/* --- CSS VARIABLES --- */
:root {
  --bg-color: #121212;
  --card-bg: #1e1e1e;
  --text-main: #e0e0e0;
  --text-muted: #a0a0a0;
  --border-color: #333;
  --accent-color: #bb86fc;
  --accent-hover: #9965f4;
  --header-bg: #2c2c2c;
   
  /* Slot Type Markers */
  --lec-marker: #90caf9;
  --tut-marker: #ffcc80;
  --lab-marker: #ef9a9a;
  --break-marker: #424242; 
   
  --active-glow: 0 0 15px rgba(187, 134, 252, 0.5);

  /* Break Card Colors */
  --break-bg: #000000;
  --break-border: #333;
}

[data-theme="light"] {
  --bg-color: #f0f2f5;
  --card-bg: #ffffff;
  --text-main: #333333;
  --text-muted: #555555;
  --border-color: #e0e0e0;
  --accent-color: #6200ea;
  --accent-hover: #5000c9;
  --header-bg: #ffffff;

  /* Slot Type Markers */
  --lec-marker: #0d47a1;
  --tut-marker: #e65100;
  --lab-marker: #c62828;
  --break-marker: #9e9e9e;

  --active-glow: 0 0 15px rgba(98, 0, 234, 0.4);

  /* Break Card Colors Light */
  --break-bg: #e0e0e0;
  --break-border: #ccc;
}

/* --- GLOBAL --- */
* { 
  box-sizing: border-box; 
  -webkit-tap-highlight-color: transparent;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
  transition: background-color 0.3s ease;
}

/* --- HEADER --- */
header {
  flex: 0 0 auto;
  width: 100%;
  height: 70px;
  padding: 0 15px;
  background: var(--header-bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  position: relative;
  transition: all 0.3s ease;
}

.brand-container {
  display: flex; 
  align-items: center; 
  gap: 15px;
}

.app-logo {
  height: 45px; 
  width: 45px; 
  border-radius: 8px; 
  object-fit: cover; 
  border: 1px solid var(--border-color);
  transition: border-color 0.3s ease;
}

h1 {
  font-weight: 800; 
  font-size: 1.3rem; 
  margin: 0;
  background: linear-gradient(90deg, var(--accent-color), #03dac6);
  -webkit-background-clip: text; 
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-controls { 
  display: flex; 
  gap: 10px; 
  align-items: center; 
}

.icon-btn {
  background: transparent; 
  border: none; 
  color: var(--text-main);
  font-size: 1.4rem; 
  cursor: pointer; 
  padding: 8px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  background: rgba(128, 128, 128, 0.1);
}

/* --- RECTANGULAR DROPDOWN --- */
.batch-dropdown-container {
  position: relative;
  width: 100%;
  margin-bottom: 15px;
}

.dropdown-trigger {
  width: 100%;
  padding: 12px 15px;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.dropdown-trigger:hover,
.dropdown-trigger:focus {
  border-color: var(--accent-color);
  outline: none;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  max-height: 300px;
  overflow-y: auto;
  background: var(--header-bg);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  margin-top: 8px;
  padding: 15px;
  z-index: 200;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  transition: all 0.3s ease;
}

.dropdown-content.show {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.batch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.batch-btn {
  padding: 10px 5px;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  color: var(--text-muted);
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.85rem;
  text-align: center;
}

.batch-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-2px);
}

.batch-btn:active {
  transform: translateY(0);
}

.batch-btn.active-batch {
  background: rgba(187, 134, 252, 0.15);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* --- FILTER PANEL --- */
.filter-toggle-btn {
  background: var(--accent-color); 
  color: #fff;
  border: none; 
  padding: 8px 16px; 
  border-radius: 20px;
  font-weight: 700; 
  font-size: 0.9rem; 
  cursor: pointer;
  display: flex; 
  align-items: center; 
  gap: 6px;
  transition: all 0.2s ease;
  box-shadow: 0 6px 16px rgba(187,134,252,0.35);
}

.filter-toggle-btn:hover { 
  background: var(--accent-hover); 
}

#filter-panel {
  background: var(--header-bg);
  width: 100%;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0.0, 0.2, 1);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  z-index: 90;
  flex: 0 0 auto;
}

#filter-panel.expanded {
  max-height: 80vh;
  overflow-y: auto;
}

.filter-content { 
  padding: 20px 15px; 
  display: flex; 
  flex-direction: column; 
  gap: 20px; 
}

.filter-group { 
  display: flex; 
  flex-direction: column; 
  gap: 8px; 
}

.filter-label { 
  font-size: 0.85rem; 
  color: var(--text-muted); 
  font-weight: 700; 
  text-transform: uppercase; 
  letter-spacing: 1px; 
}

.filter-options { 
  display: flex; 
  flex-wrap: wrap; 
  gap: 8px; 
}

.toggle-btn {
  padding: 10px;
  background: var(--card-bg); 
  border: 2px solid var(--border-color);
  color: var(--text-muted); 
  font-weight: 600; 
  border-radius: 10px;
  cursor: pointer; 
  transition: all 0.2s ease; 
  min-width: 65px;
  font-size: 0.85rem;
}

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

.toggle-btn.active {
  background: rgba(187, 134, 252, 0.15); 
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.day-btn {
  width: 45px; 
  height: 45px; 
  border-radius: 50%;
  background: var(--card-bg); 
  border: 2px solid var(--border-color);
  color: var(--text-muted); 
  font-weight: 700; 
  font-size: 0.9rem;
  display: flex; 
  align-items: center; 
  justify-content: center;
  cursor: pointer; 
  transition: all 0.2s ease;
}

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

.day-btn.active-day {
  background: var(--accent-color); 
  color: #fff; 
  border-color: var(--accent-color);
  box-shadow: 0 4px 12px rgba(187, 134, 252, 0.3);
}

/* --- VIEW CONTAINERS --- */
.view-container { 
  flex: 1; 
  position: relative; 
  overflow: hidden; 
  width: 100%; 
  transition: opacity 0.3s ease;
}

.hidden-view { 
  display: none !important; 
}

#timetable-container { 
  cursor: grab; 
  touch-action: pan-y; 
  user-select: none;
}

#timetable-container:active { 
  cursor: grabbing; 
}

.days-track { 
  display: flex; 
  height: 100%; 
  width: 600vw; 
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.5, 1); 
}

.day-view { 
  width: 100vw; 
  height: 100%; 
  overflow-y: auto; 
  padding: 15px; 
  padding-bottom: 80px; 
  scrollbar-width: thin;
  scrollbar-color: var(--accent-color) transparent;
}

.day-view::-webkit-scrollbar {
  width: 4px;
}

.day-view::-webkit-scrollbar-track {
  background: transparent;
}

.day-view::-webkit-scrollbar-thumb {
  background-color: var(--accent-color);
  border-radius: 20px;
}

.day-header { 
  font-size: 1.5rem; 
  font-weight: 800; 
  margin: 10px 0 20px; 
  color: var(--accent-color); 
  text-align: center; 
  position: sticky;
  top: 0;
  padding: 12px 0;
  background: linear-gradient(
    to bottom,
    rgba(18,18,18,0.95),
    rgba(18,18,18,0.6),
    transparent
  );
  z-index: 10;
}

.floating-batch {
  position: absolute;
  top: 15px;
  right: 15px;
  background-color: rgba(30, 30, 30, 0.85);
  color: var(--accent-color);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-weight: 800;
  font-size: 0.85rem;
  z-index: 50;
  pointer-events: none;
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
}

[data-theme="light"] .floating-batch {
  background-color: rgba(255, 255, 255, 0.85);
}

.class-card { 
  background: var(--card-bg); 
  border-radius: 16px; 
  padding: 15px; 
  margin-bottom: 15px; 
  border: none;
  box-shadow: 0 6px 18px rgba(0,0,0,0.35); 
  position: relative; 
  overflow: hidden; 
  display: flex; 
  flex-direction: column; 
  gap: 8px; 
  transition: all 0.3s ease;
}

.class-card::before { 
  content: ''; 
  position: absolute; 
  left: 0; 
  top: 0; 
  height: 100%; 
  width: 5px; 
}

.type-lec::before { 
  background-color: var(--lec-marker); 
}

.type-tut::before { 
  background-color: var(--tut-marker); 
}

.type-lab::before { 
  background-color: var(--lab-marker); 
}

.active-now { 
  border: 2px solid var(--accent-color) !important; 
  box-shadow: var(--active-glow) !important; 
  position: relative;
  z-index: 5;
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: var(--active-glow);
  }
  50% {
    box-shadow: 0 0 20px rgba(187, 134, 252, 0.8);
  }
}

.time-slot { 
  font-size: 0.85rem; 
  color: var(--text-muted); 
  font-weight: 600; 
  display: flex; 
  align-items: center; 
  gap: 6px; 
}

.time-slot::before { 
  content: '•'; 
  color: var(--accent-color); 
  opacity: 0.6;
  font-size: 1rem; 
}

.subject-name { 
  font-size: 1.2rem; 
  font-weight: 800; 
  margin: 4px 0; 
}

.card-footer { 
  display: flex; 
  flex-wrap: wrap; 
  gap: 10px; 
  margin-top: 8px; 
  padding-top: 12px; 
  border-top: 1px solid var(--border-color); 
  font-size: 0.8rem; 
  color: var(--text-muted); 
}

.info-badge { 
  display: flex; 
  align-items: center; 
  gap: 4px; 
  background: rgba(255,255,255,0.06);
  padding: 4px 10px; 
  border-radius: 20px; 
  font-weight: 600; 
  font-size: 0.75rem;
  opacity: 0.85; 
  transition: all 0.2s ease;
}

.info-badge:hover {
  opacity: 1;
  background: rgba(128,128,128,0.2);
}

.break-card { 
  background: var(--break-bg); 
  border: 1px solid var(--break-border); 
  border-radius: 20px; 
  padding: 15px; 
  margin-bottom: 15px; 
  display: flex; 
  flex-direction: column; 
  gap: 6px; 
  transition: all 0.3s ease;
}

.break-header { 
  font-size: 1rem; 
  font-weight: 700; 
  color: var(--text-main); 
}

.break-time-text { 
  font-size: 0.85rem; 
  color: var(--text-muted); 
  font-family: monospace; 
}

/* --- TABLE VIEW --- */
#compact-container { 
  overflow: auto; 
  padding: 0; 
  padding-bottom: 60px; 
  background-color: var(--bg-color); 
  scrollbar-width: thin;
  scrollbar-color: var(--accent-color) transparent;
}

#compact-container::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

#compact-container::-webkit-scrollbar-track {
  background: transparent;
}

#compact-container::-webkit-scrollbar-thumb {
  background-color: var(--accent-color);
  border-radius: 20px;
}

.weekly-table { 
  border-collapse: separate; 
  border-spacing: 0; 
  width: 100%; 
  min-width: 600px; 
}

.weekly-table th, .weekly-table td { 
  padding: 10px 6px; 
  text-align: center; 
  vertical-align: middle; 
  font-size: 0.8rem; 
  border-right: 1px solid var(--border-color); 
  border-bottom: 1px solid var(--border-color); 
  color: var(--text-main); 
  transition: all 0.3s ease;
}

.weekly-table thead th { 
  position: sticky; 
  top: 0; 
  background-color: var(--header-bg); 
  z-index: 20; 
  border-bottom: 2px solid var(--border-color); 
  font-weight: 800; 
  text-transform: uppercase; 
  font-size: 0.75rem; 
}

.weekly-table tbody td:first-child { 
  position: sticky; 
  left: 0; 
  background-color: var(--card-bg); 
  z-index: 10; 
  border-right: 2px solid var(--border-color); 
  font-weight: bold; 
  color: var(--accent-color); 
  min-width: 75px; 
  white-space: nowrap; 
  font-size: 0.7rem; 
}

.weekly-table thead th:first-child { 
  position: sticky; 
  top: 0; 
  left: 0; 
  z-index: 30; 
  background-color: var(--header-bg); 
  border-right: 2px solid var(--border-color); 
}

.cell-lec { 
  background-color: rgba(144, 202, 249, 0.15); 
  border-left: 3px solid var(--lec-marker) !important; 
}

.cell-tut { 
  background-color: rgba(255, 204, 128, 0.15); 
  border-left: 3px solid var(--tut-marker) !important; 
}

.cell-lab { 
  background-color: rgba(239, 154, 154, 0.15); 
  border-left: 3px solid var(--lab-marker) !important; 
}

.cell-break { 
  background-color: var(--break-bg); 
  opacity: 0.7; 
}

.cell-subject { 
  font-weight: 700; 
  display: block; 
  margin-bottom: 2px; 
  font-size: 0.85rem;
}

.cell-room { 
  font-size: 0.7rem; 
  color: var(--text-muted); 
  display: block; 
}

.weekly-table td.active-now {
  border: 2px solid var(--accent-color) !important;
  background-color: rgba(187, 134, 252, 0.2) !important;
  box-shadow: inset 0 0 10px var(--accent-color);
  z-index: 5;
  animation: tablePulse 2s infinite;
}

@keyframes tablePulse {
  0%, 100% {
    box-shadow: inset 0 0 10px var(--accent-color);
  }
  50% {
    box-shadow: inset 0 0 15px var(--accent-color);
  }
}
/* In the TABLE VIEW section, add: */

.weekly-table {
  border-collapse: collapse !important; /* Change from separate to collapse */
  border-spacing: 0;
  width: 100%;
  min-width: 600px;
  table-layout: fixed; /* Add this */
}

.weekly-table th {
  width: 14.28%; /* 100% / 7 columns */
  min-width: 80px;
}

.weekly-table td {
  height: 60px;
  vertical-align: middle;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: normal;
  word-wrap: break-word;
  max-width: 0; /* Helps with text overflow */
}

.weekly-table td:first-child {
  width: 100px;
  min-width: 100px;
}

/* Ensure rowspan cells don't break layout */
.weekly-table td[rowspan] {
  position: relative;
}

/* Add visual indicator for multi-hour classes */
.cell-lec[rowspan],
.cell-tut[rowspan],
.cell-lab[rowspan] {
  background: linear-gradient(
    135deg,
    transparent 0%,
    transparent 92%,
    var(--border-color) 92%,
    var(--border-color) 100%
  );
}

/* --- FOOTER --- */
.footer-sig { 
  position: fixed; 
  bottom: 0; 
  left: 0; 
  width: 100%; 
  text-align: center; 
  padding: 10px; 
  background: var(--bg-color); 
  color: var(--text-muted); 
  border-top: 1px solid var(--border-color); 
  z-index: 200; 
  padding-bottom: calc(10px + env(safe-area-inset-bottom)); 
  font-size: 0.8rem; 
  transition: all 0.3s ease;
}

.signature { 
  color: var(--accent-color); 
  font-weight: 700; 
}

/* --- LOADING STATE --- */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* --- ACCESSIBILITY --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- ANIMATIONS --- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 480px) {
  .batch-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .filter-options {
    justify-content: center;
  }
  
  h1 {
    font-size: 1.1rem;
  }
  
  .class-card {
    padding: 12px;
    margin-bottom: 18px;
  }
  
  .subject-name {
    font-size: 1.1rem;
    line-height: 1.3;
  }
}
/* Ensure day view scrolls properly */
.day-view { 
  width: 100vw; 
  height: 100%; 
  overflow-y: auto !important;
  overflow-x: hidden;
  padding: 15px; 
  padding-bottom: 80px; 
  scrollbar-width: thin;
  scrollbar-color: var(--accent-color) transparent;
  -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
  overscroll-behavior: contain; /* Prevent scroll chaining */
  touch-action: pan-y; /* Allow vertical panning */
}

/* Improve touch experience */
.class-card, .break-card {
  touch-action: pan-y; /* Allow scrolling on cards */
}

/* Prevent text selection during swipe */
.days-track {
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}