/**
 * Vista Residences - Shared Styles
 * Color palette: Gold / Slate / White
 * Mobile-first, app-like transitions
 * RTL support for Arabic
 */

/* ===== CSS Variables ===== */
:root {
  /* Brand Colors */
  --gold: #c9a227;
  --gold-light: #e8d48a;
  --gold-dark: #9a7b1a;
  --slate: #1a1a2e;
  --slate-light: #2d2d44;
  --slate-muted: #64748b;
  --white: #ffffff;
  --off-white: #f8f9fa;

  /* Semantic Colors */
  --bg: #f7f8fb;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e7e9f2;
  --accent: #c9a227;
  --accent2: #2563eb;
  --good: #16a34a;
  --warn: #f59e0b;
  --bad: #ef4444;

  /* Shadows */
  --shadow: 0 16px 40px rgba(15, 23, 42, .08);
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, .06);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, .12);

  /* Border Radius */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-arabic: 'Noto Sans Arabic', 'Dubai', 'Segoe UI', Tahoma, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Z-index scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ===== RTL Support (Arabic) ===== */
[dir="rtl"] {
  --font-sans: var(--font-arabic);
}

[dir="rtl"] .text-left { text-align: right; }
[dir="rtl"] .text-right { text-align: left; }
[dir="rtl"] .ml-auto { margin-right: auto; margin-left: 0; }
[dir="rtl"] .mr-auto { margin-left: auto; margin-right: 0; }

/* ===== Base Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 2rem; }

.text-muted { color: var(--muted); }
.text-gold { color: var(--gold); }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.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: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ===== Card Component ===== */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
}

/* ===== Button Component ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: var(--gold);
  border-color: var(--gold-dark);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--gold-dark);
}

.btn-secondary {
  background: var(--slate);
  border-color: var(--slate-light);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--slate-light);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}

.btn-ghost:hover {
  background: rgba(0, 0, 0, 0.05);
}

.btn-sm {
  padding: 0.5rem 0.875rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 1rem 1.5rem;
  font-size: 1rem;
}

/* ===== Badge/Chip Component ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid var(--line);
  background: var(--off-white);
  color: var(--muted);
}

.badge-gold {
  background: rgba(201, 162, 39, 0.1);
  border-color: rgba(201, 162, 39, 0.3);
  color: var(--gold-dark);
}

.badge-good {
  background: rgba(22, 163, 74, 0.1);
  border-color: rgba(22, 163, 74, 0.3);
  color: #065f46;
}

.badge-warn {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #92400e;
}

.badge-bad {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #991b1b;
}

/* ===== Status Badges ===== */
.status-available {
  background: rgba(22, 163, 74, 0.1);
  border-color: rgba(22, 163, 74, 0.3);
  color: #065f46;
}

.status-reserved {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #92400e;
}

.status-sold {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #991b1b;
}

/* ===== Header/Navigation ===== */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: var(--space-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--slate);
  text-decoration: none;
}

.logo-gold {
  color: var(--gold);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-link {
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold);
}

/* ===== Unit Card ===== */
.unit-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.unit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--gold);
}

.unit-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--off-white);
}

.unit-card-body {
  padding: var(--space-md);
}

.unit-card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.unit-card-meta {
  font-size: 0.75rem;
  color: var(--muted);
}

.unit-card-sqft {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  font-size: 0.75rem;
}

.unit-card-sqft span {
  display: flex;
  flex-direction: column;
}

.unit-card-sqft strong {
  font-size: 0.875rem;
  color: var(--ink);
}

.unit-card-status {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
}

[dir="rtl"] .unit-card-status {
  right: auto;
  left: var(--space-sm);
}

/* ===== Modal ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: var(--card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow: auto;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  border-bottom: 1px solid var(--line);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--off-white);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--line);
  color: var(--ink);
}

.modal-body {
  padding: var(--space-md);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-top: 1px solid var(--line);
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-xs);
  background: var(--off-white);
  border-radius: var(--radius);
  overflow-x: auto;
}

.tab {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab:hover {
  color: var(--ink);
  background: rgba(0, 0, 0, 0.05);
}

.tab.active {
  color: var(--white);
  background: var(--gold);
}

/* ===== Filter Bar ===== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.filter-select,
.filter-input {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  outline: none;
  transition: border-color var(--transition-fast);
}

.filter-select:focus,
.filter-input:focus {
  border-color: var(--gold);
}

/* ===== Language Switcher ===== */
.lang-switcher {
  display: flex;
  gap: var(--space-xs);
}

.lang-btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover,
.lang-btn.active {
  color: var(--gold);
  border-color: var(--gold);
}

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.75rem 1.25rem;
  background: var(--slate);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  z-index: var(--z-toast);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Form Elements ===== */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem;
  font-size: 0.875rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--gold);
}

/* ===== Utilities ===== */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

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

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.cursor-pointer { cursor: pointer; }

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fadeIn { animation: fadeIn var(--transition-normal); }
.animate-slideUp { animation: slideUp var(--transition-normal); }
.animate-pulse { animation: pulse 2s infinite; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }

  .header-inner {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .nav {
    width: 100%;
    justify-content: center;
  }

  .modal {
    width: 95%;
    max-height: 95vh;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
}