/* ================================================================
   Rajan Code Studio - Sections: Header, Hero, Showcase, Footer
   ================================================================ */

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background-color: rgba(255, 251, 254, 0.85);
  border-bottom: 1px solid var(--md-outline-variant);
  transition: background-color var(--motion-standard);
}

[data-theme="dark"] .site-header {
  background-color: rgba(20, 18, 24, 0.85);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .site-header {
    background-color: rgba(20, 18, 24, 0.85);
  }
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 12px;
  /* Defensive flex sizing: never let children force horizontal overflow */
  min-width: 0;
}

.site-header__inner > nav {
  min-width: 0;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  min-width: 0;
  max-width: 100%;
}

.nav-link {
  font-weight: 500;
  color: var(--md-on-surface-variant);
  padding: 8px 12px;
  border-radius: var(--radius-full);
  transition: color var(--motion-bounce), background-color var(--motion-bounce);
}

.nav-link:hover, .nav-link.active {
  color: var(--md-primary);
  background-color: var(--md-surface-container);
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
  background-color: var(--md-surface-container-high);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav-link:hover,
  :root:not([data-theme="light"]) .nav-link.active {
    background-color: var(--md-surface-container-high);
  }
}

/* Hero */
.hero {
  padding: 80px 0 60px;
}

.hero__container {
  background-color: var(--md-surface-container-low);
  border-radius: var(--radius-3xl);
  padding: 60px 48px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  border: 1px solid var(--md-outline-variant);
}

.hero__title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-display));
  max-width: 800px;
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: var(--text-lg);
  max-width: 680px;
  color: var(--md-on-surface-variant);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

/* Section Containers */
.section {
  padding: 60px 0;
}

.section__header {
  margin-bottom: 40px;
}

.section__title {
  font-size: var(--text-3xl);
  margin-bottom: 8px;
}

.section__subtitle {
  max-width: 640px;
  color: var(--md-on-surface-variant);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 24px;
}

/* App Showcase Card */
.app-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.app-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background-color: var(--md-primary-container);
  color: var(--md-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-card__icon .material-symbols-outlined {
  font-size: var(--icon-lg);
}

.app-card__title-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.app-card__title-row h3 {
  font-size: var(--text-2xl);
}

.app-card__title-row h3 a {
  color: inherit;
}

.app-card__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 12px 0;
}

.app-card__feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  color: var(--md-on-surface-variant);
}

.app-card__feature-item .material-symbols-outlined {
  font-size: var(--icon-sm);
  color: var(--md-success);
  flex-shrink: 0;
}

.app-card__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

/* Page Hero (sub-pages) */
.page-hero {
  padding: 56px 0 24px;
}

.page-hero__container {
  background-color: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-3xl);
  padding: 48px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.page-hero__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  letter-spacing: -0.02em;
}

.page-hero__subtitle {
  font-size: var(--text-md);
  max-width: 720px;
  color: var(--md-on-surface-variant);
}

/* Error Screen (404) */
.error-screen {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
}

.error-screen__card {
  position: relative;
  overflow: hidden;
  background-color: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-3xl);
  box-shadow: var(--elevation-1);
  padding: 56px 40px;
  max-width: 480px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.error-screen__badge {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background-color: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--elevation-1);
}

.error-screen__badge .material-symbols-outlined {
  font-size: var(--icon-xl);
}

.error-screen__code {
  font-size: clamp(var(--text-display), 12vw, calc(var(--text-display) + 1rem));
  line-height: 1;
  letter-spacing: -0.03em;
}

.error-screen__copy {
  text-align: center;
  max-width: 34ch;
}

.error-screen__note {
  font-size: var(--text-xs);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--md-surface-container-low);
  border-top: 1px solid var(--md-outline-variant);
  padding: 48px 0 24px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.site-footer__about {
  max-width: 340px;
  font-size: var(--text-sm);
  margin-top: 16px;
}

.site-footer__heading {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--md-on-surface-variant);
  margin-bottom: 16px;
}

.site-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: var(--text-sm);
}

.site-footer__links a {
  color: var(--md-on-surface-variant);
}

.site-footer__links a:hover {
  color: var(--md-primary);
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--md-outline-variant);
  font-size: var(--text-sm);
  color: var(--md-on-surface-variant);
}