/* Custom CSS for IMSA 2026 Program Page Outline */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Colors */
  --bg-deep: #060913;
  --bg-card: rgba(13, 20, 41, 0.65);
  --bg-card-hover: rgba(19, 29, 60, 0.85);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.15);
  --border-glow-active: rgba(0, 242, 254, 0.4);
  
  /* Brand Colors */
  --primary-navy: #0A142F;
  --accent-cyan: #00F2FE;
  --accent-blue: #4FACFE;
  --accent-purple: #7C4DFF;
  --accent-magenta: #EC008C;
  --accent-gold: #F5A623;
  
  /* Text */
  --text-primary: #F8F9FA;
  --text-secondary: #C5D1E8;
  --text-muted: #7E8C9F;
  
  /* Fonts */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Shadows & Blur */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);
  --shadow-cyan-glow: 0 0 20px rgba(0, 242, 254, 0.35);
  --glass-blur: blur(12px);
  --transition-fast: 0.2s;
}

:root[data-theme="light"] {
  --bg-deep: #f7fafc;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --border-light: rgba(15, 23, 42, 0.12);
  --border-glow: rgba(14, 116, 144, 0.2);
  --border-glow-active: rgba(14, 116, 144, 0.35);
  --primary-navy: #e2e8f0;
  --accent-cyan: #0369a1;
  --accent-blue: #2563eb;
  --accent-purple: #6d28d9;
  --accent-magenta: #be185d;
  --accent-gold: #b45309;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.10);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-cyan-glow: 0 0 20px rgba(14, 116, 144, 0.18);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-deep);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(13, 20, 41, 0.8) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(124, 77, 255, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(0, 242, 254, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

:root[data-theme="light"] body {
  background-image:
    radial-gradient(circle at 10% 20%, rgba(14, 116, 144, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(37, 99, 235, 0.06) 0%, transparent 45%),
    linear-gradient(180deg, #f7fafc 0%, #eef6fb 100%);
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: var(--primary-navy);
  border: 2px solid var(--bg-deep);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Glow Background Elements */
.glow-bg-1 {
  position: absolute; 
  top: 10%; 
  left: 5%; 
  width: 350px; 
  height: 350px; 
  background: rgba(0, 242, 254, 0.03); 
  filter: blur(100px); 
  border-radius: 50%; 
  pointer-events: none; 
  z-index: -1;
}

.glow-bg-2 {
  position: absolute; 
  top: 50%; 
  right: 10%; 
  width: 400px; 
  height: 400px; 
  background: rgba(124, 77, 255, 0.02); 
  filter: blur(120px); 
  border-radius: 50%; 
  pointer-events: none; 
  z-index: -1;
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(6, 9, 19, 0.75);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

header.scrolled {
  padding: 10px 0;
  background: rgba(6, 9, 19, 0.9);
  box-shadow: var(--shadow-md);
}

:root[data-theme="light"] header {
  background: rgba(255, 255, 255, 0.86);
}

:root[data-theme="light"] header.scrolled {
  background: rgba(255, 255, 255, 0.96);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 12px;
}

.logo-img {
  height: 48px;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0,242,254,0.2));
  transition: transform 0.3s ease;
}

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

nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast) ease;
  position: relative;
  padding: 8px 0;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  transition: width 0.3s ease;
}

nav a:hover {
  color: var(--text-primary);
}

nav a:hover::after {
  width: 100%;
}

nav a.active {
  color: var(--accent-cyan);
  font-weight: 600;
}

nav a.active::after {
  width: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-cyan));
}

.btn-register {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  color: #060913 !important;
  font-weight: 600 !important;
  padding: 10px 20px !important;
  border-radius: 30px;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.25);
  transition: all 0.3s ease !important;
}

.btn-register:hover {
  box-shadow: var(--shadow-cyan-glow);
  transform: translateY(-2px);
}

.btn-register::after {
  display: none !important;
}

.theme-toggle-program {
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-fast) ease, color var(--transition-fast) ease, border-color var(--transition-fast) ease;
}

.theme-toggle-program:hover {
  color: var(--text-primary);
  border-color: var(--border-glow-active);
  background: rgba(255, 255, 255, 0.1);
}

/* Mobile Menu Button */
.menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-btn-box {
  width: 24px;
  height: 18px;
  position: relative;
}

.menu-btn-inner, 
.menu-btn-inner::before, 
.menu-btn-inner::after {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  transition: all 0.3s ease;
  border-radius: 4px;
}

.menu-btn-inner {
  top: 50%;
  transform: translateY(-50%);
}

.menu-btn-inner::before {
  content: '';
  top: -8px;
}

.menu-btn-inner::after {
  content: '';
  bottom: -8px;
}

.menu-btn.open .menu-btn-inner {
  background-color: transparent;
}

.menu-btn.open .menu-btn-inner::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-btn.open .menu-btn-inner::after {
  bottom: 0;
  transform: rotate(-45deg);
}

/* Main Content Area */
.main-content-area {
  padding-top: 130px;
  padding-bottom: 80px;
}

/* Hero Section */
.hero-banner-container {
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  position: relative;
  transition: transform 0.5s ease, box-shadow 0.5s ease;
}

.hero-banner-container:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 242, 254, 0.15), 0 0 0 1px var(--border-glow-active);
}

.hero-banner-img {
  width: 100%;
  height: auto;
  display: block;
}

/* Typography Title Sections */
.title-section {
  text-align: center; 
  margin-bottom: 40px;
}

.main-title {
  font-family: var(--font-heading); 
  font-size: 2.2rem; 
  font-weight: 800; 
  color: var(--text-primary); 
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.subtitle {
  color: var(--accent-cyan); 
  font-weight: 600; 
  text-transform: uppercase; 
  letter-spacing: 2px; 
  font-size: 0.9rem;
}

.program-note {
  max-width: 760px;
  margin: 16px auto 0;
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.days-nav-container {
  display: flex; 
  gap: 15px; 
  justify-content: center; 
  margin-bottom: 40px;
}

.day-header-anchor {
  padding-top: 100px;
  margin-top: -100px;
}

.day-title {
  font-family: var(--font-heading); 
  font-size: 1.5rem; 
  color: var(--text-primary); 
  margin-bottom: 15px; 
  display: flex; 
  align-items: center; 
  gap: 10px;
}

.day-icon {
  color: var(--accent-cyan);
}

/* Button UI */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

/* Tables Outline Design */
.program-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: 50px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-md);
}

.program-table th {
  background: rgba(13, 20, 41, 0.95);
  color: var(--accent-cyan);
  font-family: var(--font-heading);
  font-weight: 700;
  text-align: left;
  padding: 16px 20px;
  font-size: 1rem;
  letter-spacing: 0.5px;
  border-bottom: 2px solid rgba(0, 242, 254, 0.3);
}

.program-table td {
  padding: 20px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: top;
}

.program-table tr:last-child td {
  border-bottom: none;
}

.time-col {
  width: 20%;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
  border-right: 1px solid var(--border-light);
}

.time-sub {
  font-size: 0.8rem; 
  font-weight: normal; 
  color: var(--text-muted);
  display: inline-block;
  margin-top: 2px;
}

.content-col {
  width: 80%;
}

.session-header {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.session-title-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.session-desc {
  font-size: 0.85rem; 
  color: var(--text-muted); 
  margin: 0;
}

.morning-agenda {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.agenda-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 10px;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.agenda-item span {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--accent-cyan);
  white-space: nowrap;
}

.social-row .content-col {
  background: rgba(245, 166, 35, 0.035);
}

/* Badges for Session Nature */
.nature-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: var(--font-body);
}

.badge-plenary {
  background: rgba(236, 0, 140, 0.12);
  color: var(--accent-magenta);
  border: 1px solid rgba(236, 0, 140, 0.2);
}

.badge-oral {
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.2);
}

.badge-poster {
  background: rgba(79, 172, 254, 0.1);
  color: var(--accent-blue);
  border: 1px solid rgba(79, 172, 254, 0.2);
}

.badge-roundtable {
  background: rgba(124, 77, 255, 0.12);
  color: var(--accent-purple);
  border: 1px solid rgba(124, 77, 255, 0.2);
}

.badge-social {
  background: rgba(245, 166, 35, 0.1);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 166, 35, 0.2);
}

/* Theme Icons inside headers */
.theme-icon-plenary {
  color: var(--accent-magenta);
}

.theme-icon-social {
  color: var(--accent-gold);
}

.theme-icon-general {
  color: var(--accent-cyan);
}

/* Parallel Sessions Grid */
.parallel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 10px;
}

.parallel-col {
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.parallel-col:hover {
  border-color: var(--border-glow);
  background: rgba(255, 255, 255, 0.03);
}

.parallel-col-roundtable {
  border-color: rgba(124, 77, 255, 0.25);
  background: rgba(124, 77, 255, 0.01);
}

.parallel-col-roundtable:hover {
  border-color: rgba(124, 77, 255, 0.5);
  background: rgba(124, 77, 255, 0.03);
}

.parallel-col h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--accent-cyan);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.parallel-col h5 {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text-primary);
  margin: 0;
  border-bottom: 1px dashed var(--border-light);
  padding-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.parallel-col-roundtable h5 {
  border-bottom: 1px dashed rgba(124, 77, 255, 0.25);
}

/* Track header icons colors */
.track-icon-blue {
  color: var(--accent-blue);
}

.track-icon-cyan {
  color: var(--accent-cyan);
}

.track-icon-purple {
  color: var(--accent-purple);
}

/* Topics list inside cards */
.topics-list {
  margin: 10px 0 0 16px; 
  padding: 0; 
  font-size: 0.8rem; 
  color: var(--text-secondary); 
  text-align: left;
}

.topics-list li {
  margin-bottom: 5px;
  line-height: 1.4;
}

.topics-list li::marker {
  color: var(--accent-cyan);
}

.parallel-col-roundtable .topics-list li::marker {
  color: var(--accent-purple);
}

/* Footer */
footer {
  background: #03060C;
  border-top: 1px solid var(--border-light);
  padding: 40px 0 30px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

:root[data-theme="light"] footer {
  background: #eaf2f8;
}

.version-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.footer-event {
  color: var(--text-secondary);
  font-weight: 600;
  margin-top: 10px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.78rem;
}

.footer-contact a {
  color: var(--text-secondary);
}

.footer-contact a:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   PARALLEL MOBILE UI/UX & RESPONSIVE TYPOGRAPHY
   ========================================================================== */

@media (max-width: 1024px) {
  .parallel-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .parallel-col-roundtable {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .logo-img {
    height: 36px;
  }
  .nav-container {
    padding: 10px 0;
  }
  .main-content-area {
    padding-top: 80px;
    padding-bottom: 40px;
  }

  /* Scale down base layout */
  .container {
    padding: 0 16px;
  }
  
  .day-header-anchor {
    padding-top: 80px;
    margin-top: -80px;
  }

  /* Responsive Headers & Typography scaling */
  .main-title {
    font-size: 1.5rem;
  }

  .subtitle {
    font-size: 0.78rem;
    letter-spacing: 1.5px;
  }

  .day-title {
    font-size: 1.25rem;
  }

  .session-header {
    font-size: 0.95rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .session-title-wrapper {
    width: 100%;
  }

  .nature-badge {
    font-size: 0.65rem;
    padding: 2px 6px;
  }

  .session-desc {
    font-size: 0.8rem;
  }

  .parallel-col h4 {
    font-size: 0.88rem;
  }

  .parallel-col h5 {
    font-size: 0.8rem;
    padding-bottom: 6px;
  }

  .topics-list {
    font-size: 0.75rem;
    margin-top: 8px;
    margin-left: 12px;
  }

  .program-note {
    font-size: 0.82rem;
    padding: 10px 12px;
  }

  .agenda-item {
    grid-template-columns: 1fr;
    gap: 3px;
    font-size: 0.78rem;
  }

  .theme-toggle-program {
    font-size: 0.95rem;
  }

  /* Mobile Table UI/UX transformation (Stacking columns to eliminate horizontal scroll) */
  .program-table, 
  .program-table tbody, 
  .program-table tr, 
  .program-table td {
    display: block;
    width: 100% !important;
  }

  .program-table thead {
    display: none; /* Hide header row since content is self-labeled */
  }

  .program-table tr {
    border-bottom: 2px solid var(--border-light);
    padding: 12px 6px;
  }

  .program-table tr:last-child {
    border-bottom: none;
  }

  .program-table td {
    border: none !important;
    padding: 8px 12px !important;
  }

  .time-col {
    font-size: 0.85rem !important;
    color: var(--accent-cyan) !important;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding-bottom: 2px !important;
  }

  .time-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 0;
    text-transform: none;
    letter-spacing: 0;
  }

  .content-col {
    padding-top: 0 !important;
  }

  /* Stacking the Parallel Grid card items vertically on mobile devices */
  .parallel-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
    margin-top: 12px !important;
  }

  .parallel-col-roundtable {
    grid-column: span 1 !important;
  }

  .parallel-col {
    padding: 12px;
  }

  /* Navigation burger menu styling */
  .menu-btn {
    display: block;
    z-index: 1001;
  }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 280px;
    height: 100vh;
    background: rgba(6, 9, 19, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--border-light);
    padding: 100px 30px 40px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
  }

  :root[data-theme="light"] nav {
    background: rgba(255, 255, 255, 0.96);
  }

  nav.open {
    right: 0;
  }

  nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  nav a {
    font-size: 1.05rem;
  }

  .btn-register {
    width: 100%;
    text-align: center;
    margin-top: 10px;
  }
}

@media (max-width: 480px) {
  /* Extra scaling for small devices (e.g. iPhone SE) */
  .main-title {
    font-size: 1.35rem;
  }
  
  .day-title {
    font-size: 1.15rem;
  }

  .days-nav-container {
    flex-direction: column;
    gap: 10px;
    align-items: center;
  }

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

  .program-table tr {
    padding: 10px 4px;
  }

  .program-table td {
    padding: 6px 10px !important;
  }
}