/*
 * CalcPrism Alt B — "Gradient Glass" Layout
 * ==========================================
 * Glassmorphism nav, gradient footer, glass overlays,
 * page structure with generous spacing.
 */

/* ═══════════════════════════════════════════
   Base / Body
   ═══════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* matches main padding-top so anchors don't hide behind sticky nav */
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--ink);
  background: var(--bg);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-2);
}

/* ═══════════════════════════════════════════
   Navigation — Editorial (Stage 9)
   Primary styles live in components.css (.nav.site-nav etc.).
   Only auxiliary parts that aren't part of the editorial system
   (lang dropdown, hamburger) live here.
   ═══════════════════════════════════════════ */

.nav-lang-wrap {
  position: relative;
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 160px;
  margin-top: var(--space-1);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 150ms ease, visibility 0s 150ms, transform 150ms ease;
  z-index: 1100;
}

.lang-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition: opacity 150ms ease, visibility 0s, transform 150ms ease;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--ink);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.lang-option:hover {
  background: var(--accent-soft);
}

.lang-option.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

.lang-option:not(.is-active) svg {
  visibility: hidden;
}

.nav-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--radius-md);
  background: none;
  cursor: pointer;
  padding: 0;
}

.nav-hamburger span,
.nav-hamburger span::before,
.nav-hamburger span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-hamburger span::before,
.nav-hamburger span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
}

.nav-hamburger span::before { top: -7px; }
.nav-hamburger span::after { top: 7px; }

/* ═══════════════════════════════════════════
   Search Overlay — Glass
   ═══════════════════════════════════════════ */

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
  background: rgba(30, 27, 75, 0.4);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 200ms ease-out, visibility 0s 200ms;
}

.search-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 200ms ease-out, visibility 0s;
}

.glass-overlay {
  /* explicit class for JS-rendered overlay */
}

.search-overlay-inner {
  width: 100%;
  max-width: 600px;
  margin: 0 var(--space-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(-8px);
  transition: transform 200ms ease-out;
}

.glass-panel {
  /* explicit class for JS-rendered panel */
}

.search-overlay.is-open .search-overlay-inner {
  transform: translateY(0);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--line-strong);
}

.search-icon {
  flex-shrink: 0;
  color: var(--ink-3);
}

.search-input-wrap input {
  flex: 1;
  border: none;
  background: none;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--ink);
  outline: none;
}

.search-input-wrap input::placeholder {
  color: var(--ink-3);
}

.search-clear {
  flex-shrink: 0;
  background: none;
  border: none;
  font-size: var(--text-xl);
  color: var(--ink-3);
  cursor: pointer;
  padding: 0 var(--space-1);
  line-height: 1;
  transition: color var(--transition-fast);
}

.search-clear:hover {
  color: var(--ink);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  text-decoration: none;
  color: var(--ink);
  transition: background var(--transition-fast);
}

.search-result-item:hover {
  background: var(--accent-soft);
}

.result-icon {
  flex-shrink: 0;
  display: flex;
  color: var(--ink-3);
}

.result-name {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.result-badge {
  font-size: var(--text-xs);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: var(--font-medium);
}

.search-popular {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--line-strong);
}

.popular-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-inline-end: var(--space-3);
}

.search-popular a {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  margin: var(--space-1);
  transition: all var(--transition-fast);
}

.search-popular a:hover {
  background: var(--accent-soft);
}

/* ═══════════════════════════════════════════
   Mobile Menu — Glass Sidebar
   ═══════════════════════════════════════════ */

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 100vw;
  z-index: 9999;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 250ms ease;
  overflow-x: hidden;
  overflow-y: auto;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 250ms ease, visibility 0s 250ms;
}

.mobile-menu-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 250ms ease, visibility 0s;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--line-strong);
}

.mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--radius-full);
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-menu-close:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.mobile-menu-search {
  padding: var(--space-4) var(--space-6);
}

.mobile-menu-search input {
  width: 100%;
  padding: 12px 16px;
  min-height: 48px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  background: var(--surface);
  cursor: pointer;
}

.mobile-menu-links {
  flex: 1;
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-menu-links a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  min-height: 48px;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--ink);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.mobile-menu-links a:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.mobile-menu-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.mobile-menu-footer .icon-btn {
  min-width: 44px;
  min-height: 44px;
}

/* ═══════════════════════════════════════════
   Content Container
   ═══════════════════════════════════════════ */

.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-8);
}

/* ═══════════════════════════════════════════
   Footer — Editorial (Stage 9)
   Styles live in components.css (.foot, .foot-inner, etc.).
   ═══════════════════════════════════════════ */

/* ═══════════════════════════════════════════
   Dark Mode — Layout Overrides
   ═══════════════════════════════════════════ */

/* .site-nav dark-mode bg is handled by color-mix in components.css */

[data-theme='dark'] .lang-dropdown {
  background: var(--surface);
  border-color: var(--line);
}

[data-theme='dark'] .lang-option {
  color: var(--ink);
}

[data-theme='dark'] .lang-option:hover {
  background: rgba(96, 165, 250, 0.1);
}

[data-theme='dark'] .lang-option.is-active {
  background: rgba(96, 165, 250, 0.15);
  color: #60A5FA;
}

[data-theme='dark'] .search-overlay {
  background: rgba(0, 0, 0, 0.75);
}

[data-theme='dark'] .search-overlay-inner {
  background-color: #1F2937;
  border-color: #374151;
}

[data-theme='dark'] .search-input-wrap {
  border-bottom-color: #374151;
}

[data-theme='dark'] .search-input-wrap input {
  color: #F9FAFB;
}

[data-theme='dark'] .search-input-wrap input::placeholder {
  color: #6B7280;
}

[data-theme='dark'] .search-clear {
  color: #6B7280;
}

[data-theme='dark'] .search-clear:hover {
  color: #F9FAFB;
}

[data-theme='dark'] .search-result-item {
  color: #F9FAFB;
}

[data-theme='dark'] .search-result-item:hover {
  background: rgba(96, 165, 250, 0.1);
}

[data-theme='dark'] .result-badge {
  color: #D1D5DB;
}

[data-theme='dark'] .search-popular {
  border-top-color: #374151;
}

[data-theme='dark'] .search-popular a {
  background: rgba(96, 165, 250, 0.15);
  color: #60A5FA;
}

[data-theme='dark'] .search-popular a:hover {
  background: rgba(96, 165, 250, 0.25);
}

[data-theme='dark'] .mobile-menu {
  background: var(--surface);
}

[data-theme='dark'] .mobile-menu-backdrop {
  background: rgba(0, 0, 0, 0.6);
}

[data-theme='dark'] .mobile-menu-header {
  border-bottom-color: #374151;
}

[data-theme='dark'] .mobile-menu-search input {
  background: #111827;
  border-color: #374151;
  color: #F9FAFB;
}

[data-theme='dark'] .mobile-menu-links a {
  color: var(--ink);
}

[data-theme='dark'] .mobile-menu-links a:hover {
  background: rgba(96, 165, 250, 0.1);
}

[data-theme='dark'] .mobile-menu-footer {
  border-top-color: #374151;
}

/* ═══════════════════════════════════════════
   Responsive — Tablet (1024px)
   ═══════════════════════════════════════════ */

@media (max-width: 1024px) {
  .nav-hamburger {
    display: flex;
  }

  .content {
    padding: 0 var(--space-6);
  }
}

/* ═══════════════════════════════════════════
   Responsive — Mobile (768px)
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {
  html {
    scroll-padding-top: 72px; /* matches mobile main padding-top */
  }

  .nav-lang-wrap { display: none; }

  .content {
    padding: 0 var(--space-4);
  }

  .search-overlay {
    padding-top: 80px;
  }
}