/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
  /* Light theme */
  --bg-primary: #fafbfc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f0f2f5;
  --text-primary: #1a1d23;
  --text-secondary: #5f6980;
  --text-tertiary: #8b95a8;
  --accent: #0e7c6b;
  --accent-light: #e8f5f2;
  --accent-hover: #0a6355;
  --border: #e2e6ed;
  --border-light: #f0f2f5;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1), 0 8px 20px rgba(0,0,0,0.06);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-ar: 'Noto Kufi Arabic', 'Inter', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-accent: linear-gradient(135deg, #0e7c6b 0%, #14a38b 100%);
  --gradient-bg: linear-gradient(135deg, #e8f5f2 0%, #f0f7ff 50%, #fef3e8 100%);
}

[data-theme="dark"] {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-tertiary: #252833;
  --text-primary: #e8eaf0;
  --text-secondary: #9ca3b4;
  --text-tertiary: #6b7385;
  --accent: #2dd4a8;
  --accent-light: #1a2d28;
  --accent-hover: #5ee6c0;
  --border: #2a2d3a;
  --border-light: #1f222d;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.3);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.4);
  --gradient-bg: linear-gradient(135deg, #0a1a15 0%, #0f1520 50%, #1a150f 100%);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-en);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

[dir="rtl"] body {
  font-family: var(--font-ar);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Background Decoration
   ============================================ */
.bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  transition: opacity var(--transition);
}

[data-theme="dark"] .bg-circle {
  opacity: 0.15;
}

.bg-circle-1 {
  width: 500px;
  height: 500px;
  background: #0e7c6b;
  top: -200px;
  right: -150px;
  opacity: 0.08;
}

.bg-circle-2 {
  width: 400px;
  height: 400px;
  background: #3b82f6;
  bottom: -100px;
  left: -100px;
  opacity: 0.06;
}

.bg-circle-3 {
  width: 300px;
  height: 300px;
  background: #f59e0b;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.04;
}

/* ============================================
   Header
   ============================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 251, 252, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition), border var(--transition);
}

[data-theme="dark"] .header {
  background: rgba(15, 17, 23, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.logo-text {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Hamburger menu button (mobile only) */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  order: -1;
}

.menu-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.menu-toggle .icon {
  width: 20px;
  height: 20px;
}

.menu-toggle .close-icon {
  display: none;
}

.menu-toggle.active .hamburger-icon {
  display: none;
}

.menu-toggle.active .close-icon {
  display: block;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.btn-icon:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.btn-icon .icon {
  width: 18px;
  height: 18px;
}

.lang-label {
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-ar);
}

[dir="rtl"] .lang-label {
  font-family: var(--font-en);
}

/* Navigation links */
.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-link:hover {
  color: var(--accent);
  background: var(--accent-light);
}

.nav-link--active {
  color: var(--accent);
  font-weight: 600;
  background: var(--accent-light);
}

#langToggle {
  width: auto;
  padding: 0 14px;
  font-size: 0.8rem;
}

/* Theme toggle icons */
[data-theme="light"] .moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 60px 0 32px;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ============================================
   Today Banner
   ============================================ */
.today-banner {
  position: relative;
  z-index: 1;
  padding: 16px 0 32px;
}

.today-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  flex-wrap: wrap;
}

.today-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.today-label {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
}

.today-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.today-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ============================================
   Converter Card
   ============================================ */
.converter-section {
  position: relative;
  z-index: 1;
  padding-bottom: 80px;
}

.converter-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition);
}

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

/* Direction Toggle */
.direction-toggle {
  display: flex;
  position: relative;
  background: var(--bg-tertiary);
  padding: 6px;
  margin: 24px 24px 0;
  border-radius: var(--radius-md);
  gap: 4px;
}

.direction-btn {
  flex: 1;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  z-index: 2;
  white-space: nowrap;
}

.direction-btn.active {
  color: var(--text-primary);
  font-weight: 600;
}

.direction-slider {
  position: absolute;
  top: 6px;
  left: 6px;
  width: calc(50% - 8px);
  height: calc(100% - 12px);
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
  z-index: 1;
}

.direction-slider.right {
  transform: translateX(calc(100% + 4px));
}

/* Converter Body */
.converter-body {
  display: flex;
  align-items: stretch;
  padding: 32px 24px;
  gap: 24px;
}

.input-panel, .result-panel {
  flex: 1;
  min-width: 0;
}

.panel-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

/* Date Selectors */
.date-selectors {
  display: flex;
  gap: 12px;
}

.select-group {
  flex: 1;
  min-width: 0;
}

.select-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-tertiary);
  margin-bottom: 6px;
}

.select-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b95a8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

[dir="rtl"] .select-input {
  background-position: left 12px center;
  padding-right: 14px;
  padding-left: 32px;
}

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

.select-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* Arrow Divider */
.arrow-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  flex-shrink: 0;
  color: var(--accent);
  opacity: 0.6;
}

.arrow-divider svg {
  width: 24px;
  height: 24px;
}

/* Result Panel */
.result-display {
  background: var(--gradient-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  position: relative;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition);
}

[data-theme="dark"] .result-display {
  background: var(--bg-tertiary);
}

.result-date {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  transition: all var(--transition);
}

.result-date.animate {
  animation: fadeInUp 0.4s ease;
}

.result-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.result-day-name {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.result-month-detail {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* Copy Button */
.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition);
}

[dir="rtl"] .copy-btn {
  right: auto;
  left: 12px;
}

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

.copy-btn .icon {
  width: 16px;
  height: 16px;
}

.copy-tooltip {
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.copy-btn.copied .copy-tooltip {
  opacity: 1;
}

/* ============================================
   Month Info Card
   ============================================ */
.month-info-card {
  margin-top: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  animation: fadeInUp 0.4s ease;
}

.month-info-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.month-info-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.month-info-badge {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--accent-light);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.month-info-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 48px 0 32px;
  border-top: 1px solid var(--border-light);
  background: var(--bg-secondary);
  transition: background var(--transition);
}

/* Islamic ornament divider */
.footer-ornament {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
  color: var(--accent);
}

.footer-ornament svg {
  width: 120px;
  height: 24px;
}

/* Footer content layout */
.footer-content {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 560px;
  margin: 0 auto 32px;
}

.footer-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-heading {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 2px;
}

.footer-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 480px;
  font-family: var(--font-ar);
}

/* Email link */
.footer-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  direction: ltr;
  transition: all var(--transition);
}

.footer-email:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.footer-email .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Footer bottom bar */
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.footer-rights {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-tertiary);
  font-family: var(--font-ar);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  opacity: 0.7;
  direction: ltr;
}

/* Privacy link */
.footer-privacy-link {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  transition: all var(--transition);
}

.footer-privacy-link:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  /* Mobile hamburger menu */
  .menu-toggle {
    display: flex;
  }

  .header-actions .nav-link {
    display: none;
  }

  .nav-mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 12px 24px;
    z-index: 99;
    animation: fadeIn 0.2s ease;
  }

  .nav-mobile-menu.open {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .nav-mobile-menu .nav-link {
    display: block;
    font-size: 0.95rem;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    text-align: right;
  }

  [dir="ltr"] .nav-mobile-menu .nav-link {
    text-align: left;
  }

  .hero {
    padding: 40px 0 24px;
  }

  .converter-body {
    flex-direction: column;
    gap: 16px;
    padding: 24px 16px;
  }

  .arrow-divider {
    width: 100%;
    height: 32px;
    transform: rotate(90deg);
  }

  .direction-toggle {
    margin: 16px 16px 0;
  }

  .direction-btn {
    font-size: 0.8rem;
    padding: 10px 12px;
  }

  .date-selectors {
    gap: 8px;
  }

  .select-input {
    padding: 10px 10px;
    font-size: 0.85rem;
    padding-right: 28px;
  }

  [dir="rtl"] .select-input {
    padding-right: 10px;
    padding-left: 28px;
  }

  .today-card {
    gap: 16px;
    padding: 16px 20px;
  }

  .today-divider {
    display: none;
  }

  .today-card {
    flex-direction: column;
  }

  .result-date {
    font-size: 1.25rem;
  }

  .month-info-card {
    padding: 18px;
  }

  .footer {
    padding: 36px 0 24px;
  }

  .footer-content {
    gap: 24px;
    margin-bottom: 24px;
  }

  .footer-text {
    font-size: 0.85rem;
  }

  .footer-email {
    font-size: 0.82rem;
    padding: 8px 18px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .header-inner {
    height: 56px;
  }
}

/* ============================================
   RTL Adjustments
   ============================================ */
[dir="rtl"] .arrow-divider svg {
  transform: scaleX(-1);
}

[dir="rtl"] .direction-slider.right {
  transform: translateX(calc(-100% - 4px));
}

[dir="rtl"] .direction-slider:not(.right) {
  left: auto;
  right: 6px;
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ============================================
   Selection
   ============================================ */
::selection {
  background: var(--accent);
  color: white;
}