/* =============================================================
   Orion DS — Component Library
   Atomic Design: Atoms > Molecules > Organisms
   Version: 1.0.0 | Built on tokens.css
   ============================================================= */

/* =============================================================
   0. RESET & BASE
   ============================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--surface-default);
}

img,
picture,
video,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* =============================================================
   0.1 BREAKPOINTS & LAYOUT
   ============================================================= */

:root {
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
  --container-max: 1200px;
  --container-padding: var(--spacing-4);
}

@media (min-width: 768px) {
  :root {
    --container-padding: var(--spacing-8);
  }
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  padding-block: var(--spacing-16);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--spacing-24);
  }
}

/* =============================================================
   1. ATOMS
   ============================================================= */

/* -------------------------------------------------------------
   1.1 Badge
   ------------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  white-space: nowrap;
  line-height: 1;
}

.badge--sm {
  padding: var(--spacing-1) var(--spacing-2);
  font-size: var(--font-size-xs);
}

.badge--md,
.badge:not([class*="badge--sm"]):not([class*="badge--md"]) {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-sm);
}

.badge--accent {
  background-color: var(--action-primary-bg);
  color: var(--action-primary-fg);
}

.badge--subtle {
  background-color: var(--surface-subtle);
  color: var(--text-secondary);
}

.badge--success {
  background-color: var(--feedback-success-bg);
  color: var(--feedback-success-fg);
}

.badge--warning {
  background-color: var(--feedback-warning-bg);
  color: var(--feedback-warning-fg);
}

.badge--error {
  background-color: var(--feedback-error-bg);
  color: var(--feedback-error-fg);
}

.badge__icon {
  flex-shrink: 0;
  width: 1em;
  height: 1em;
}

/* -------------------------------------------------------------
   1.2 Button
   ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition:
    background-color var(--duration-fast) var(--easing-default),
    color var(--duration-fast) var(--easing-default),
    border-color var(--duration-fast) var(--easing-default),
    box-shadow var(--duration-fast) var(--easing-default),
    transform var(--duration-fast) var(--easing-default);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Sizes */

.btn--sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
}

.btn--md,
.btn:not([class*="btn--sm"]):not([class*="btn--md"]):not([class*="btn--lg"]) {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
}

.btn--lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

/* Variants */

.btn--primary {
  background-color: var(--action-primary-bg);
  color: var(--action-primary-fg);
}

.btn--primary:hover:not(:disabled) {
  background-color: var(--action-primary-hover);
}

.btn--primary:active:not(:disabled) {
  background-color: var(--action-primary-active);
}

.btn--secondary {
  background-color: var(--action-secondary-bg);
  color: var(--action-secondary-fg);
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--action-secondary-hover);
}

.btn--ghost {
  background-color: var(--action-ghost-bg);
  color: var(--action-ghost-fg);
}

.btn--ghost:hover:not(:disabled) {
  background-color: var(--action-ghost-hover);
}

.btn--outline {
  background-color: transparent;
  color: var(--text-accent);
  border-color: var(--border-accent);
}

.btn--outline:hover:not(:disabled) {
  background-color: var(--action-primary-bg);
  color: var(--action-primary-fg);
  border-color: var(--action-primary-bg);
}

.btn__icon {
  flex-shrink: 0;
  width: 1.25em;
  height: 1.25em;
}

/* -------------------------------------------------------------
   1.3 Input
   ------------------------------------------------------------- */

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.input-group__label {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input {
  width: 100%;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  transition:
    border-color var(--duration-fast) var(--easing-default),
    box-shadow var(--duration-fast) var(--easing-default);
}

.input::placeholder {
  color: var(--text-secondary);
}

.input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: var(--focus-ring);
}

.input--error,
.input--error:focus {
  border-color: var(--feedback-error-fg);
}

.input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Filled variant */
.input--filled {
  background-color: var(--surface-raised);
  border-color: transparent;
}

.input--filled:focus {
  border-color: var(--border-focus);
}

/* Sizes */

.input--sm {
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--font-size-sm);
}

.input--md,
.input:not([class*="input--sm"]):not([class*="input--md"]):not([class*="input--lg"]) {
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
}

.input--lg {
  padding: var(--spacing-4) var(--spacing-5);
  font-size: var(--font-size-lg);
}

/* Icons inside input */
.input-wrap__icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 1.25em;
  height: 1.25em;
  color: var(--text-secondary);
  pointer-events: none;
}

.input-wrap__icon--leading {
  left: var(--spacing-3);
}

.input-wrap__icon--trailing {
  right: var(--spacing-3);
}

.input-wrap--has-leading .input {
  padding-left: var(--spacing-10);
}

.input-wrap--has-trailing .input {
  padding-right: var(--spacing-10);
}

/* Helper / error text */
.input-group__helper {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.input-group__helper--error {
  color: var(--feedback-error-fg);
}

/* =============================================================
   2. MOLECULES
   ============================================================= */

/* -------------------------------------------------------------
   2.1 Card
   ------------------------------------------------------------- */

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition:
    box-shadow var(--duration-normal) var(--easing-default),
    border-color var(--duration-normal) var(--easing-default),
    transform var(--duration-normal) var(--easing-default);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card--featured {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow-lime);
}

.card--featured:hover {
  box-shadow: var(--shadow-glow-lime), var(--shadow-lg);
}

.card--glass {
  background: rgba(30, 29, 48, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: rgba(255, 255, 255, 0.08);
}

.card__media {
  position: relative;
  overflow: hidden;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--easing-default);
}

.card:hover .card__media img {
  transform: scale(1.03);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  padding: var(--spacing-6);
}

.card--sm .card__body {
  padding: var(--spacing-4);
  gap: var(--spacing-2);
}

.card--lg .card__body {
  padding: var(--spacing-8);
  gap: var(--spacing-4);
}

.card__title {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  line-height: var(--line-height-snug);
}

.card__description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.card__meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.card__footer {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-6);
  border-top: 1px solid var(--border-subtle);
}

/* -------------------------------------------------------------
   2.2 SectionHeader
   ------------------------------------------------------------- */

.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-12);
}

.section-header--center {
  align-items: center;
  text-align: center;
}

.section-header--left {
  align-items: flex-start;
  text-align: left;
}

.section-header__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-1) var(--spacing-4);
  background-color: var(--action-primary-bg);
  color: var(--action-primary-fg);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-full);
}

.section-header__title {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-3xl);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
}

.section-header--large .section-header__title {
  font-size: var(--font-size-4xl);
}

@media (min-width: 768px) {
  .section-header__title {
    font-size: var(--font-size-4xl);
  }

  .section-header--large .section-header__title {
    font-size: var(--font-size-5xl);
  }
}

.section-header__title .accent {
  color: var(--text-accent);
}

.section-header__subtitle {
  font-family: var(--font-family-body);
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 640px;
}

/* -------------------------------------------------------------
   2.3 Stats
   ------------------------------------------------------------- */

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-8);
}

.stats--row {
  flex-direction: row;
}

.stats--grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
}

@media (min-width: 768px) {
  .stats--grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-2);
}

.stat__icon {
  width: 2rem;
  height: 2rem;
  color: var(--text-accent);
  margin-bottom: var(--spacing-2);
}

.stat__number {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-black);
  font-size: var(--font-size-3xl);
  color: var(--text-accent);
  line-height: var(--line-height-tight);
}

.stats--large .stat__number {
  font-size: var(--font-size-5xl);
}

@media (min-width: 768px) {
  .stat__number {
    font-size: var(--font-size-4xl);
  }

  .stats--large .stat__number {
    font-size: var(--font-size-6xl);
  }
}

.stat__label {
  font-family: var(--font-family-body);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

/* =============================================================
   3. ORGANISMS
   ============================================================= */

/* -------------------------------------------------------------
   3.1 Navbar
   ------------------------------------------------------------- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--container-padding);
  background-color: var(--surface-default);
  border-bottom: 1px solid var(--border-subtle);
  transition:
    background-color var(--duration-normal) var(--easing-default),
    box-shadow var(--duration-normal) var(--easing-default),
    backdrop-filter var(--duration-normal) var(--easing-default);
}

.navbar--transparent {
  background-color: transparent;
  border-bottom-color: transparent;
}

.navbar--scrolled {
  background-color: var(--surface-raised);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.navbar__logo {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  line-height: 1;
}

.navbar__nav {
  display: none;
  align-items: center;
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .navbar__nav {
    display: flex;
  }
}

.navbar__link {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
  transition: color var(--duration-fast) var(--easing-default);
}

.navbar__link:hover {
  color: var(--text-accent);
}

.navbar__link--active {
  color: var(--text-primary);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.navbar__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--easing-default);
}

.navbar__toggle:hover {
  background-color: var(--action-ghost-hover);
}

.navbar__hamburger {
  display: flex;
}

@media (min-width: 768px) {
  .navbar__hamburger {
    display: none;
  }
}

/* Mobile menu */
.navbar__mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  top: 60px;
  z-index: var(--z-dropdown);
  flex-direction: column;
  gap: var(--spacing-2);
  padding: var(--spacing-6);
  background-color: var(--surface-default);
  border-top: 1px solid var(--border-subtle);
}

.navbar__mobile-menu.is-open {
  display: flex;
}

.navbar__mobile-link {
  display: block;
  padding: var(--spacing-3) var(--spacing-4);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition:
    color var(--duration-fast) var(--easing-default),
    background-color var(--duration-fast) var(--easing-default);
}

.navbar__mobile-link:hover {
  color: var(--text-accent);
  background-color: var(--action-ghost-hover);
}

/* -------------------------------------------------------------
   3.2 Hero
   ------------------------------------------------------------- */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--spacing-24) var(--container-padding) var(--spacing-16);
  background-color: var(--surface-default);
  overflow: hidden;
}

.hero--compact {
  min-height: auto;
  padding-block: var(--spacing-16);
}

.hero--centered {
  text-align: center;
}

.hero--centered .hero__content {
  align-items: center;
}

.hero--split {
  flex-direction: column;
  gap: var(--spacing-12);
}

@media (min-width: 1024px) {
  .hero--split {
    flex-direction: row;
    align-items: center;
  }

  .hero--split .hero__content {
    flex: 1;
  }

  .hero--split .hero__visual {
    flex: 1;
  }
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero__headline {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-black);
  font-size: var(--font-size-4xl);
  color: var(--text-primary);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

@media (min-width: 768px) {
  .hero__headline {
    font-size: var(--font-size-5xl);
  }
}

@media (min-width: 1024px) {
  .hero__headline {
    font-size: var(--font-size-6xl);
  }
}

.hero__headline .accent {
  color: var(--text-accent);
}

.hero__subtitle {
  font-family: var(--font-family-body);
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 560px;
}

@media (min-width: 768px) {
  .hero__subtitle {
    font-size: var(--font-size-xl);
  }
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.hero--centered .hero__cta {
  justify-content: center;
}

.hero__visual {
  position: relative;
  z-index: 1;
}

/* Background decorations (optional) */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

/* -------------------------------------------------------------
   3.3 BeforeAfter
   ------------------------------------------------------------- */

.before-after {
  position: relative;
  overflow: hidden;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  user-select: none;
  touch-action: none;
}

.before-after--md {
  max-width: 640px;
}

.before-after--lg {
  max-width: 960px;
}

.before-after--full {
  max-width: 100%;
}

.before-after__before,
.before-after__after {
  position: absolute;
  inset: 0;
}

.before-after__before img,
.before-after__after img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.before-after__before {
  z-index: 1;
  overflow: hidden;
}

.before-after__after {
  z-index: 0;
}

/* Spacer to maintain aspect ratio */
.before-after__spacer {
  display: block;
  width: 100%;
  pointer-events: none;
  visibility: hidden;
}

/* Labels */
.before-after__label {
  position: absolute;
  top: var(--spacing-4);
  z-index: 3;
  padding: var(--spacing-2) var(--spacing-3);
  background-color: var(--surface-overlay);
  color: var(--text-primary);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  pointer-events: none;
}

.before-after__label--before {
  left: var(--spacing-4);
}

.before-after__label--after {
  right: var(--spacing-4);
}

/* Slider handle */
.before-after__handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: 2;
  width: 4px;
  transform: translateX(-50%);
  background-color: var(--action-primary-bg);
  cursor: ew-resize;
}

.before-after__handle::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 3rem;
  height: 3rem;
  background-color: var(--action-primary-bg);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.before-after__handle::after {
  content: "\2194";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--action-primary-fg);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  z-index: 1;
  pointer-events: none;
}

/* Toggle variant */
.before-after--toggle .before-after__handle {
  display: none;
}

.before-after--toggle .before-after__toggle-bar {
  display: flex;
  gap: var(--spacing-2);
  justify-content: center;
  padding: var(--spacing-3);
  position: absolute;
  bottom: var(--spacing-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  background-color: var(--surface-overlay);
  border-radius: var(--radius-full);
}

/* -------------------------------------------------------------
   3.4 CourseCard
   ------------------------------------------------------------- */

.course-card {
  display: flex;
  flex-direction: column;
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition:
    box-shadow var(--duration-normal) var(--easing-default),
    border-color var(--duration-normal) var(--easing-default),
    transform var(--duration-normal) var(--easing-default);
}

.course-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.course-card--featured {
  border-color: var(--border-accent);
}

.course-card--featured:hover {
  box-shadow: var(--shadow-glow-lime), var(--shadow-lg);
}

.course-card__thumbnail {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.course-card__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--easing-default);
}

.course-card:hover .course-card__thumbnail img {
  transform: scale(1.05);
}

.course-card__badge {
  position: absolute;
  top: var(--spacing-3);
  left: var(--spacing-3);
}

.course-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  padding: var(--spacing-5);
  flex: 1;
}

.course-card__title {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  line-height: var(--line-height-snug);
}

.course-card__instructor {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.course-card__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.course-card__rating {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  color: var(--color-feedback-warning);
}

.course-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--spacing-5);
  border-top: 1px solid var(--border-subtle);
  margin-top: auto;
}

.course-card__price {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--text-accent);
}

.course-card__price-original {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-decoration: line-through;
  font-weight: var(--font-weight-regular);
  margin-left: var(--spacing-2);
}

/* Compact variant */
.course-card--compact {
  flex-direction: row;
}

.course-card--compact .course-card__thumbnail {
  width: 160px;
  min-width: 160px;
  aspect-ratio: auto;
}

@media (max-width: 639px) {
  .course-card--compact {
    flex-direction: column;
  }

  .course-card--compact .course-card__thumbnail {
    width: 100%;
    min-width: auto;
    aspect-ratio: 16 / 9;
  }
}

/* -------------------------------------------------------------
   3.5 Pricing
   ------------------------------------------------------------- */

.pricing {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 768px) {
  .pricing--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-plan {
  display: flex;
  flex-direction: column;
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  position: relative;
  transition:
    border-color var(--duration-normal) var(--easing-default),
    box-shadow var(--duration-normal) var(--easing-default);
}

.pricing-plan--highlighted {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow-lime);
}

@media (min-width: 768px) {
  .pricing-plan--highlighted {
    transform: scale(1.05);
    z-index: 1;
  }
}

.pricing-plan__badge {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
}

.pricing-plan__name {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.pricing-plan__price {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-black);
  font-size: var(--font-size-5xl);
  color: var(--text-accent);
  line-height: var(--line-height-tight);
}

.pricing-plan__period {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: var(--font-weight-regular);
  margin-bottom: var(--spacing-6);
}

.pricing-plan__features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-8);
  flex: 1;
}

.pricing-plan__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
}

.pricing-plan__feature::before {
  content: "\2713";
  flex-shrink: 0;
  color: var(--text-accent);
  font-weight: var(--font-weight-bold);
}

.pricing-plan__feature--disabled {
  opacity: 0.4;
  text-decoration: line-through;
}

.pricing-plan__feature--disabled::before {
  content: "\2717";
  color: var(--text-secondary);
}

.pricing-plan__cta {
  margin-top: auto;
}

/* -------------------------------------------------------------
   3.6 Testimonial
   ------------------------------------------------------------- */

.testimonial {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  position: relative;
}

.testimonial--featured {
  border-color: var(--border-accent);
}

.testimonial--compact {
  padding: var(--spacing-5);
  gap: var(--spacing-3);
}

.testimonial--inline {
  flex-direction: row;
  align-items: flex-start;
  gap: var(--spacing-6);
}

@media (max-width: 639px) {
  .testimonial--inline {
    flex-direction: column;
  }
}

.testimonial__quote {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  line-height: var(--line-height-relaxed);
  font-style: italic;
  position: relative;
}

.testimonial__quote::before {
  content: "\201C";
  font-family: var(--font-family-display);
  font-size: var(--font-size-5xl);
  color: var(--text-accent);
  line-height: 1;
  position: absolute;
  top: -0.25em;
  left: -0.05em;
  opacity: 0.4;
}

.testimonial--featured .testimonial__quote {
  font-size: var(--font-size-lg);
}

.testimonial__rating {
  display: flex;
  gap: var(--spacing-1);
  color: var(--color-feedback-warning);
  font-size: var(--font-size-base);
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.testimonial__avatar {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  border: 2px solid var(--border-accent);
  object-fit: cover;
  flex-shrink: 0;
}

.testimonial__author-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.testimonial__author-name {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.testimonial__author-role {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* -------------------------------------------------------------
   3.7 FAQ
   ------------------------------------------------------------- */

.faq {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  max-width: 800px;
  margin-inline: auto;
}

.faq-item {
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-fast) var(--easing-default);
}

.faq--bordered .faq-item {
  border-radius: 0;
  border-left: none;
  border-right: none;
}

.faq--bordered .faq-item + .faq-item {
  border-top: none;
}

.faq-item.is-open {
  border-color: var(--border-accent);
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
  width: 100%;
  padding: var(--spacing-5) var(--spacing-6);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  text-align: left;
  line-height: var(--line-height-snug);
  transition: color var(--duration-fast) var(--easing-default);
}

.faq-item__question:hover {
  color: var(--text-accent);
}

.faq-item__toggle {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  color: var(--text-accent);
  transition: transform var(--duration-normal) var(--easing-default);
}

.faq-item.is-open .faq-item__toggle {
  transform: rotate(180deg);
}

.faq-item__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-normal) var(--easing-default);
}

.faq-item.is-open .faq-item__answer {
  grid-template-rows: 1fr;
}

.faq-item__answer-inner {
  overflow: hidden;
}

.faq-item__answer-content {
  padding: 0 var(--spacing-6) var(--spacing-5);
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* -------------------------------------------------------------
   3.8 Footer
   ------------------------------------------------------------- */

.footer {
  background-color: var(--surface-subtle);
  border-top: 1px solid var(--border-subtle);
  padding-block: var(--spacing-16);
}

.footer--minimal {
  padding-block: var(--spacing-8);
}

.footer__grid {
  display: grid;
  gap: var(--spacing-10);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.footer__logo {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
}

.footer__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 320px;
}

.footer__column-title {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  margin-bottom: var(--spacing-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--easing-default);
}

.footer__link:hover {
  color: var(--text-accent);
}

.footer__social {
  display: flex;
  gap: var(--spacing-3);
}

.footer__social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  background-color: var(--surface-raised);
  transition:
    color var(--duration-fast) var(--easing-default),
    background-color var(--duration-fast) var(--easing-default);
}

.footer__social-icon:hover {
  color: var(--text-accent);
  background-color: var(--action-ghost-hover);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
  padding-top: var(--spacing-8);
  margin-top: var(--spacing-10);
  border-top: 1px solid var(--border-subtle);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer__copyright {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.footer__newsletter {
  display: flex;
  gap: var(--spacing-2);
  max-width: 400px;
  width: 100%;
}

.footer__newsletter .input {
  flex: 1;
}

/* =============================================================
   4. UTILITIES
   ============================================================= */

/* Typography */

.text-heading {
  font-family: var(--font-family-heading);
}

.text-display {
  font-family: var(--font-family-display);
}

.text-body {
  font-family: var(--font-family-body);
}

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }
.text-6xl { font-size: var(--font-size-6xl); }

.font-regular { font-weight: var(--font-weight-regular); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-black { font-weight: var(--font-weight-black); }

.leading-tight { line-height: var(--line-height-tight); }
.leading-snug { line-height: var(--line-height-snug); }
.leading-normal { line-height: var(--line-height-normal); }
.leading-relaxed { line-height: var(--line-height-relaxed); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--text-accent); }
.text-inverse { color: var(--text-inverse); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Spacing */

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-12 { margin-top: var(--spacing-12); }
.mt-16 { margin-top: var(--spacing-16); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-12 { margin-bottom: var(--spacing-12); }
.mb-16 { margin-bottom: var(--spacing-16); }

.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

/* Layout */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .md\:flex-row { flex-direction: row; }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Visibility */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden { display: none; }

@media (max-width: 767px) {
  .hide-mobile { display: none; }
}

@media (min-width: 768px) {
  .hide-desktop { display: none; }
}

/* Surfaces */

.bg-default { background-color: var(--surface-default); }
.bg-subtle { background-color: var(--surface-subtle); }
.bg-raised { background-color: var(--surface-raised); }
.bg-accent { background-color: var(--surface-accent); }

/* Borders */

.border { border: 1px solid var(--border-default); }
.border-subtle { border: 1px solid var(--border-subtle); }
.border-accent { border: 1px solid var(--border-accent); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Width */

.w-full { width: 100%; }
.max-w-sm { max-width: 640px; }
.max-w-md { max-width: 768px; }
.max-w-lg { max-width: 1024px; }
.max-w-xl { max-width: 1280px; }

/* Transitions */

.transition-fast {
  transition-duration: var(--duration-fast);
  transition-timing-function: var(--easing-default);
}

.transition-normal {
  transition-duration: var(--duration-normal);
  transition-timing-function: var(--easing-default);
}

.transition-slow {
  transition-duration: var(--duration-slow);
  transition-timing-function: var(--easing-default);
}

/* =============================================================
   5. DARK LANDING — ATOMS
   ============================================================= */

/* -------------------------------------------------------------
   5.1 StatementBanner
   ------------------------------------------------------------- */

.statement {
  padding: var(--spacing-16) 0;
  text-align: center;
}

.statement__text {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-black);
  text-transform: uppercase;
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

.statement__text .accent {
  color: var(--text-accent);
}

.statement--left {
  text-align: left;
}

.statement--compact {
  padding: var(--spacing-8) 0;
}

@media (min-width: 768px) {
  .statement__text {
    font-size: var(--font-size-4xl);
  }
}

@media (min-width: 1024px) {
  .statement__text {
    font-size: var(--font-size-5xl);
  }
}

/* -------------------------------------------------------------
   5.2 StatsRow (Hero variant)
   ------------------------------------------------------------- */

.stats-hero {
  display: flex;
  gap: var(--spacing-8);
  justify-content: center;
  flex-wrap: wrap;
  padding: var(--spacing-12) 0;
}

.stats-hero__item {
  text-align: left;
}

.stats-hero__number {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-black);
  color: var(--text-accent);
  line-height: 1;
}

.stats-hero__label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-top: var(--spacing-1);
}

.stats-hero--stacked {
  flex-direction: column;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .stats-hero {
    gap: var(--spacing-12);
  }

  .stats-hero__number {
    font-size: var(--font-size-5xl);
  }
}

@media (min-width: 1024px) {
  .stats-hero__number {
    font-size: var(--font-size-6xl);
  }
}

/* -------------------------------------------------------------
   5.3 TerminalBlock
   ------------------------------------------------------------- */

.terminal {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  font-family: var(--font-family-mono);
  overflow-x: auto;
}

.terminal__header {
  display: flex;
  gap: var(--spacing-2);
  padding-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--border-subtle);
}

.terminal__dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background-color: var(--color-dark-600);
}

.terminal__dot--red {
  background-color: var(--color-feedback-error);
}

.terminal__dot--yellow {
  background-color: var(--color-feedback-warning);
}

.terminal__dot--green {
  background-color: var(--color-feedback-success);
}

.terminal__content {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.terminal__line {
  padding: var(--spacing-1) 0;
}

.terminal__prompt {
  color: var(--text-accent);
}

.terminal__comment {
  color: var(--color-dark-600);
}

/* -------------------------------------------------------------
   5.4 ResultsCard
   ------------------------------------------------------------- */

.results-card {
  background-color: var(--surface-raised);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  position: relative;
  overflow: hidden;
}

.results-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, hsla(76, 100%, 63%, 0.08), transparent 70%);
  pointer-events: none;
}

.results-card__metrics {
  display: flex;
  gap: var(--spacing-8);
}

.results-card__number {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-black);
  color: var(--text-accent);
  line-height: 1;
}

.results-card__label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
}

.results-card__description {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  max-width: 60ch;
  margin-top: var(--spacing-4);
}

@media (min-width: 768px) {
  .results-card {
    padding: var(--spacing-12);
  }

  .results-card__number {
    font-size: var(--font-size-6xl);
  }
}

/* =============================================================
   6. DARK LANDING — MOLECULES
   ============================================================= */

/* -------------------------------------------------------------
   6.1 MethodGrid
   ------------------------------------------------------------- */

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
}

.method-card {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  transition:
    border-color var(--duration-normal) var(--easing-default),
    transform var(--duration-normal) var(--easing-default);
}

.method-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.method-card__icon {
  width: 48px;
  height: 48px;
  background-color: var(--surface-raised);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-accent);
  margin-bottom: var(--spacing-4);
}

.method-card__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.method-card__description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.method-card__letter {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  color: var(--text-accent);
}

/* -------------------------------------------------------------
   6.2 TeamTable
   ------------------------------------------------------------- */

.team-table {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1px;
  background-color: var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.team-table__cell {
  background-color: var(--surface-subtle);
  padding: var(--spacing-4) var(--spacing-5);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
  transition: background-color var(--duration-fast) var(--easing-default);
}

.team-table__cell:hover {
  background-color: var(--surface-raised);
}

.team-table__name {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.team-table__role {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.team-table__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
}

.team-table--numbered {
  counter-reset: team-member;
}

.team-table--numbered .team-table__cell::before {
  counter-increment: team-member;
  content: counter(team-member);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* =============================================================
   7. DARK LANDING — ORGANISMS
   ============================================================= */

/* -------------------------------------------------------------
   7.1 HorizontalScroll
   Snap-scrolling card carousel with edge fade gradients
   ------------------------------------------------------------- */

.hscroll {
  position: relative;
  overflow: hidden;
}

.hscroll__track {
  display: flex;
  gap: var(--spacing-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: var(--spacing-2) 0;
  scrollbar-width: none;
}

@media (min-width: 768px) {
  .hscroll__track {
    gap: var(--spacing-6);
  }
}

.hscroll__track::-webkit-scrollbar {
  display: none;
}

.hscroll__item {
  flex: 0 0 auto;
  width: 80vw;
  scroll-snap-align: start;
}

@media (min-width: 768px) {
  .hscroll__item {
    width: 300px;
  }
}

.hscroll__item--wide {
  width: 90vw;
}

@media (min-width: 768px) {
  .hscroll__item--wide {
    width: 400px;
  }
}

.hscroll__card {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: border-color var(--duration-normal) var(--easing-default);
}

.hscroll__card:hover {
  border-color: var(--border-accent);
}

.hscroll__card-tag {
  font-size: var(--font-size-xs);
  color: var(--text-accent);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--spacing-2);
}

.hscroll__card-title {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.hscroll__card-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  flex: 1;
}

.hscroll__nav {
  display: flex;
  gap: var(--spacing-2);
  justify-content: center;
  margin-top: var(--spacing-6);
}

.hscroll__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-dark-600);
  border: none;
  cursor: pointer;
  transition:
    background-color var(--duration-fast) var(--easing-default),
    width var(--duration-fast) var(--easing-default);
}

.hscroll__dot.is-active {
  background-color: var(--color-lime-500);
  width: 24px;
}

/* Gradient fade on edges */
.hscroll::before,
.hscroll::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 40px;
  z-index: 1;
  pointer-events: none;
}

.hscroll::before {
  left: 0;
  background: linear-gradient(to right, var(--surface-default), transparent);
}

.hscroll::after {
  right: 0;
  background: linear-gradient(to left, var(--surface-default), transparent);
}

/* -------------------------------------------------------------
   7.2 CalculatorUI
   Dark tool/calculator with labeled inputs and output display
   ------------------------------------------------------------- */

.calculator {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  max-width: 700px;
}

.calculator__header {
  margin-bottom: var(--spacing-6);
}

.calculator__title {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  color: var(--text-primary);
}

.calculator__subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-1);
}

.calculator__body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.calculator__field {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.calculator__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.calculator__input {
  background-color: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  transition:
    border-color var(--duration-fast) var(--easing-default),
    box-shadow var(--duration-fast) var(--easing-default);
}

.calculator__input:focus {
  border-color: var(--border-accent);
  outline: none;
  box-shadow: var(--focus-ring);
}

.calculator__range {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background-color: var(--surface-raised);
  border-radius: var(--radius-full);
  outline: none;
}

.calculator__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background-color: var(--color-lime-500);
  cursor: pointer;
  border: 2px solid var(--color-dark-900);
}

.calculator__range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background-color: var(--color-lime-500);
  cursor: pointer;
  border: 2px solid var(--color-dark-900);
}

.calculator__output {
  background-color: var(--surface-raised);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  margin-top: var(--spacing-4);
}

.calculator__output-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.calculator__output-value {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-black);
  color: var(--text-accent);
  margin-top: var(--spacing-1);
}

.calculator__divider {
  height: 1px;
  background-color: var(--border-subtle);
  margin: var(--spacing-2) 0;
}

@media (max-width: 639px) {
  .calculator {
    padding: var(--spacing-5);
  }
}

/* -------------------------------------------------------------
   7.3 SystemDiagram
   Connected flow/system with lines between nodes
   ------------------------------------------------------------- */

.system-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-6);
  position: relative;
  padding: var(--spacing-8) 0;
}

.system-diagram__node {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4) var(--spacing-6);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  min-width: 250px;
  position: relative;
  z-index: 1;
  transition:
    border-color var(--duration-normal) var(--easing-default),
    box-shadow var(--duration-normal) var(--easing-default);
}

.system-diagram__node:hover {
  border-color: var(--border-accent);
}

.system-diagram__node--active {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow-lime);
}

.system-diagram__node-icon {
  width: 40px;
  height: 40px;
  background-color: var(--surface-raised);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-accent);
  flex-shrink: 0;
}

.system-diagram__node-text {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

.system-diagram__node-sub {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.system-diagram__connector {
  width: 1px;
  height: 32px;
  background-color: var(--border-subtle);
  position: relative;
}

.system-diagram__connector::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 8px;
  height: 8px;
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  transform: rotate(45deg) translateX(-50%);
}

.system-diagram--horizontal {
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
}

.system-diagram--horizontal .system-diagram__connector {
  width: 32px;
  height: 1px;
}

.system-diagram--horizontal .system-diagram__connector::after {
  bottom: auto;
  left: auto;
  right: 0;
  top: 50%;
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  transform: rotate(-45deg) translateY(-50%);
}

@media (max-width: 768px) {
  .system-diagram--horizontal {
    flex-direction: column;
  }

  .system-diagram--horizontal .system-diagram__connector {
    width: 1px;
    height: 32px;
  }

  .system-diagram--horizontal .system-diagram__connector::after {
    bottom: 0;
    left: 50%;
    right: auto;
    top: auto;
    border-right: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    transform: rotate(45deg) translateX(-50%);
  }

  .system-diagram__node {
    min-width: auto;
    width: 100%;
  }
}

/* -------------------------------------------------------------
   7.4 FinalCTA
   Full-viewport dark CTA section with centered emphasis
   ------------------------------------------------------------- */

.final-cta {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-16) var(--spacing-4);
  position: relative;
  overflow: hidden;
}

.final-cta__badge {
  font-size: var(--font-size-xs);
  color: var(--text-accent);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--spacing-6);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
}

.final-cta__title {
  font-family: var(--font-family-heading);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-black);
  text-transform: uppercase;
  color: var(--text-primary);
  max-width: 800px;
  line-height: var(--line-height-tight);
}

@media (min-width: 768px) {
  .final-cta__title {
    font-size: var(--font-size-4xl);
  }
}

@media (min-width: 1024px) {
  .final-cta__title {
    font-size: var(--font-size-5xl);
  }
}

.final-cta__title .accent {
  color: var(--text-accent);
}

.final-cta__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin-top: var(--spacing-4);
  line-height: var(--line-height-relaxed);
}

.final-cta__actions {
  display: flex;
  gap: var(--spacing-4);
  margin-top: var(--spacing-8);
  flex-wrap: wrap;
  justify-content: center;
}

/* Background glow decoration */
.final-cta::before {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(192, 255, 66, 0.08) 0%,
    transparent 70%
  );
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

/* -------------------------------------------------------------
   7.5 Divider
   Section divider with optional text
   ------------------------------------------------------------- */

.divider {
  height: 1px;
  background-color: var(--border-subtle);
  margin: var(--spacing-12) 0;
}

.divider--accent {
  background: linear-gradient(
    to right,
    transparent,
    var(--border-accent),
    transparent
  );
}

.divider--text {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  height: auto;
  background: none;
}

.divider--text::before,
.divider--text::after {
  content: "";
  flex: 1;
  height: 1px;
  background-color: var(--border-subtle);
}

.divider__text {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  white-space: nowrap;
}

/* =============================================================
   FOCUS VISIBLE — WCAG 2.4.7
   ============================================================= */

.navbar__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

.navbar__toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-md);
}

.faq-item__question:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-md);
}

.footer__social-icon:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.footer__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

.pricing-plan:focus-visible,
.testimonial:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.hscroll__dot:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.before-after__handle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* =============================================================
   REDUCED MOTION — WCAG 2.1 SC 2.3.3
   ============================================================= */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}