@import "https://fonts.googleapis.com/earlyaccess/droidarabickufi.css";

:root {
  /* Brand Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --secondary-color: #f59e0b;
  --secondary-hover: #d97706;
  --accent-color: #10b981;
  --accent-hover: #059669;

  /* Neutral Colors */
  --background-light: #fafafa;
  --background-dark: #0f0f0f;
  --surface-light: #ffffff;
  --surface-dark: #1a1a1a;
  --card-background-light: #ffffff;
  --card-background-dark: #1f1f1f;

  /* Text Colors */
  --text-primary-light: #111827;
  --text-primary-dark: #f9fafb;
  --text-secondary-light: #6b7280;
  --text-secondary-dark: #9ca3af;
  --text-muted-light: #9ca3af;
  --text-muted-dark: #6b7280;

  /* Border Colors */
  --border-light: #e5e7eb;
  --border-dark: #374151;
  --border-focus: var(--primary-color);

  /* Shadow Colors */
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-dark: rgba(0, 0, 0, 0.3);
  --shadow-colored: rgba(37, 99, 235, 0.15);

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

body {
  font-size: 1rem;
  line-height: 1.6;
  background-color: var(--background-light);
  color: var(--text-primary-light);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

.dark body {
  background-color: var(--background-dark);
  color: var(--text-primary-dark);
}

/* Typography Scale */
h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.025em;
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.3;
  font-weight: 600;
}

h4 {
  font-size: 1.25rem;
  line-height: 1.4;
  font-weight: 600;
}

p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary-light);
}

.dark p {
  color: var(--text-secondary-dark);
}

/* Text utilities */
.text-muted {
  color: var(--text-muted-light);
}

.dark .text-muted {
  color: var(--text-muted-dark);
}

#heroCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    border-radius: 0.75rem;
}
.hero-content-wrapper {
    position: relative;
    overflow: hidden;
    border-radius: 0.75rem;
    width: auto;
}
.dropdown:hover .dropdown-menu { display: block; }
.transition-all-custom { transition: all 0.3s ease; }
.ai-powered-title {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
  background-size: 200% 200%;
  animation: gradient-shift 4s ease-in-out infinite;
  color: transparent;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
  position: relative;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.feature-card {
  background-color: var(--card-background-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.dark .feature-card {
  background-color: var(--card-background-dark);
}
.feature-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}
.dark .feature-card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
}
section {
  background-color: var(--background-light);
}

.dark section {
  background-color: var(--background-dark);
}

footer {
  background-color: var(--background-light);
}

.dark footer {
  background-color: var(--background-dark);
}

html, body { height: 100%; overflow-x: hidden; }
body { min-height: 100vh; }
.spark-logo-container { width: 80px; height: auto; }
.spark-logo { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }

@keyframes fadeSlideUp {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}
.animate-fade-slide-up {
  animation: fadeSlideUp .6s ease-out;
}

.shimmer {
  position: relative;
  overflow: hidden;
  background-color: #f3f4f6; /* Tailwind: gray-100 */
}
.dark .shimmer {
  background-color: #3a3a3a;
}
.shimmer::after {
  content: "";
  position: absolute;
  top: 0;
  left: -150px;
  height: 100%;
  width: 150px;
  background: linear-gradient(to right, transparent 0%, #e0e0e0 50%, transparent 100%);
  animation: shimmerMove 1.5s infinite;
}
.dark .shimmer::after {
  background: linear-gradient(to right, transparent 0%, #4a4a4a 50%, transparent 100%);
}
@keyframes shimmerMove {
  0% { left: -150px; }
  100% { left: 100%; }
}
/* Card Components */
.card {
  background-color: var(--card-background-light);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: 0 1px 3px var(--shadow-light);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.dark .card {
  background-color: var(--card-background-dark);
  border-color: var(--border-dark);
  box-shadow: 0 1px 3px var(--shadow-dark);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px var(--shadow-light);
}

.dark .card:hover {
  box-shadow: 0 10px 25px var(--shadow-dark);
}

.news-card {
  user-select: none;
  -webkit-user-drag: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  background: var(--card-background-light);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 8px var(--shadow-light);
  transition: all var(--transition-normal);
  overflow: hidden;
  position: relative;
}

.dark .news-card {
  background-color: var(--card-background-dark);
  border-color: var(--border-dark);
  box-shadow: 0 2px 8px var(--shadow-dark);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px var(--shadow-light);
  border-color: var(--primary-color);
}

.dark .news-card:hover {
  box-shadow: 0 12px 30px var(--shadow-dark);
}

.news-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.news-card:hover::before {
  opacity: 1;
}
#newsCarousel {
  cursor: grab;
  scroll-behavior: smooth;
}
#newsCarousel.cursor-grabbing {
  cursor: grabbing;
}
.share-trend-btn {
  transition: color 0.3s ease;
}
#aiArticlesCarousel {
  scroll-snap-type: x mandatory;
}
#aiArticlesCarousel > div {
  scroll-snap-align: start;
}

.search-input-container {
  position: relative;
}

.search-input-container input {
  padding-right: 2.5rem; /* Space for the clear button */
}

.search-input-container .clear-button {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  color: #ef4444; /* Tailwind red-500 */
}

.search-input-container .clear-button:hover {
  color: #b91c1c; /* Tailwind red-700 */
}
/* Form Components */
.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  background-color: var(--surface-light);
  color: var(--text-primary-light);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
  outline: none;
}

.dark .form-input {
  border-color: var(--border-dark);
  background-color: var(--surface-dark);
  color: var(--text-primary-dark);
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  transform: translateY(-1px);
}

.form-input::placeholder {
  color: var(--text-muted-light);
}

.dark .form-input::placeholder {
  color: var(--text-muted-dark);
}

/* Enhanced Search Component */
.search-container {
  position: relative;
  max-width: 28rem;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  padding-right: 7rem;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-2xl);
  background: var(--surface-light);
  backdrop-filter: blur(10px);
  color: var(--text-primary-light);
  font-size: 1rem;
  transition: all var(--transition-normal);
  outline: none;
  box-shadow: 0 4px 12px var(--shadow-light);
}

.dark .search-input {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  color: var(--text-primary-dark);
  box-shadow: 0 4px 12px var(--shadow-dark);
}

.search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1), 0 8px 20px var(--shadow-light);
  transform: translateY(-2px);
}

.search-btn {
  position: absolute;
  right: var(--space-xs);
  top: 50%;
  transform: translateY(-50%);
  padding: var(--space-sm) var(--space-md);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: white;
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.search-btn:hover {
  transform: translateY(-50%) scale(1.05);
  box-shadow: 0 4px 12px var(--shadow-colored);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--surface-light);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 8px var(--shadow-light);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-behavior: smooth;
}

.nav-tabs::-webkit-scrollbar {
  display: none;
}

.dark .nav-tabs {
  background: var(--surface-dark);
  border-color: var(--border-dark);
  box-shadow: 0 2px 8px var(--shadow-dark);
}

.nav-tab {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-secondary-light);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dark .nav-tab {
  color: var(--text-secondary-dark);
}

.nav-tab:hover {
  color: var(--text-primary-light);
  background: var(--border-light);
  transform: translateY(-1px);
}

.dark .nav-tab:hover {
  color: var(--text-primary-dark);
  background: var(--border-dark);
}

.nav-tab.active {
  color: white;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  box-shadow: 0 4px 12px var(--shadow-colored);
  transform: translateY(-2px);
}

.nav-tab.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  pointer-events: none;
}

/* Header Component */
.header {
  background: var(--surface-light);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: all var(--transition-normal);
}

.dark .header {
  background: var(--surface-dark);
  border-bottom-color: var(--border-dark);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px var(--shadow-light);
  transition: transform var(--transition-normal);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary-light);
}

.dark .logo-text h1 {
  color: var(--text-primary-dark);
}

.logo-text p {
  font-size: 0.75rem;
  margin: 0;
  opacity: 0.8;
}

/* Dropdown Component */
.dropdown {
  position: relative;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-sm);
  background: var(--surface-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  color: var(--text-primary-light);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 0.875rem;
}

.dark .dropdown-trigger {
  background: var(--surface-dark);
  border-color: var(--border-dark);
  color: var(--text-primary-dark);
}

.dropdown-trigger:hover {
  background: var(--border-light);
  transform: translateY(-1px);
}

.dark .dropdown-trigger:hover {
  background: var(--border-dark);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-xs));
  right: 0;
  min-width: 10rem;
  background: var(--surface-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 25px var(--shadow-light);
  padding: var(--space-sm);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
}

/* Mobile-specific dropdown positioning */
@media (max-width: 768px) {
  .dropdown-menu {
    right: -1rem;
    left: auto;
    min-width: 12rem;
    max-width: calc(100vw - 2rem);
  }

  /* Ensure dropdown doesn't go off-screen on very small devices */
  @media (max-width: 480px) {
    .dropdown-menu {
      right: -0.5rem;
      min-width: 11rem;
      max-width: calc(100vw - 1rem);
    }
  }
}

.dark .dropdown-menu {
  background: var(--surface-dark);
  border-color: var(--border-dark);
  box-shadow: 0 8px 25px var(--shadow-dark);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary-light);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-size: 0.875rem;
}

.dark .dropdown-item {
  color: var(--text-primary-dark);
}

.dropdown-item:hover {
  background: var(--border-light);
  color: var(--primary-color);
}

.dark .dropdown-item:hover {
  background: var(--border-dark);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-light);
  color: var(--text-primary-light);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: 0 8px 25px var(--shadow-light);
  backdrop-filter: blur(20px);
  z-index: 100;
  transition: all var(--transition-normal);
  max-width: 90vw;
}

.dark .toast {
  background: var(--surface-dark);
  color: var(--text-primary-dark);
  border-color: var(--border-dark);
  box-shadow: 0 8px 25px var(--shadow-dark);
}

.toast.success {
  border-color: var(--accent-color);
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  color: white;
}

.toast.error {
  border-color: #ef4444;
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
}

/* Game Component */
.game-container {
  background: var(--card-background-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  box-shadow: 0 8px 25px var(--shadow-light);
  max-width: 42rem;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.dark .game-container {
  background: var(--card-background-dark);
  border-color: var(--border-dark);
  box-shadow: 0 8px 25px var(--shadow-dark);
}

.game-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.game-question {
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--text-primary-light);
  line-height: 1.6;
}

.dark .game-question {
  color: var(--text-primary-dark);
}

.game-buttons {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.game-feedback {
  text-align: center;
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.game-score {
  text-align: center;
  color: var(--text-secondary-light);
  margin-bottom: var(--space-xl);
}

.dark .game-score {
  color: var(--text-secondary-dark);
}

/* Responsive Design Enhancements */
@media (max-width: 768px) {
  .header-content {
    padding: var(--space-sm) var(--space-md);
  }

  .logo {
    width: 2rem;
    height: 2rem;
  }

  .logo-text h1 {
    font-size: 1rem;
  }

  .logo-text p {
    font-size: 0.625rem;
  }

  /* Enhanced Mobile Navigation Tabs */
  .nav-tabs {
    padding: var(--space-sm);
    gap: var(--space-sm);
    margin: 0 var(--space-sm);
    border-radius: var(--radius-lg);
  }

  .nav-tab {
    padding: var(--space-md) var(--space-lg);
    font-size: 0.875rem;
    font-weight: 600;
    min-height: 3rem;
    min-width: fit-content;
    border-radius: var(--radius-md);
  }

  .nav-tab.active {
    box-shadow: 0 2px 8px var(--shadow-colored);
    transform: none;
  }

  .nav-tab:hover {
    transform: none;
  }

  .search-input {
    padding: var(--space-sm) var(--space-md);
    padding-right: 6rem;
    font-size: 0.875rem;
  }

  .game-container {
    padding: var(--space-lg);
    margin: var(--space-md);
  }

  .game-buttons {
    flex-direction: column;
    gap: var(--space-md);
  }
}

/* Extra small mobile devices */
@media (max-width: 480px) {
  .nav-tabs {
    padding: var(--space-xs);
    gap: var(--space-xs);
    margin: 0 var(--space-xs);
  }

  .nav-tab {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
    min-height: 2.5rem;
    font-weight: 500;
  }

  .header-content {
    padding: var(--space-xs) var(--space-sm);
  }

  .logo-text h1 {
    font-size: 0.75rem;
  }

  .logo-text p {
    font-size: 0.5rem;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-light: #000000;
    --border-dark: #ffffff;
    --shadow-light: rgba(0, 0, 0, 0.5);
    --shadow-dark: rgba(255, 255, 255, 0.5);
  }
}