/**
 * ==============================================================================
 * SUCCESSWALA UNIVERSAL RESPONSIVE ENGINE (CSS)
 * ==============================================================================
 * Multi-Device Adaptive Architecture: Mobile, Tablet, Laptop, Ultra-Wide Desktop
 * Fully Compatible with Dark Mode ([data-theme="dark"]) and Light Mode.
 * 
 * Viewport Tiers:
 *   - Mobile XS:   < 375px     (Compact phones: iPhone SE, Android Budget)
 *   - Mobile SM:   375px-575px (Standard phones: iPhone 13-16, Galaxy S21-S24)
 *   - Tablet MD:   576px-768px (Small tablets, phablets, foldables)
 *   - Tablet LG:   769px-1024px(iPad, iPad Pro, Android tablets, small laptops)
 *   - Laptop XL:   1025px-1366px(MacBook Air, ThinkPad, 1080p 125% scaled)
 *   - Desktop XXL: 1367px-1919px(Standard full-HD desktops, iMac)
 *   - Ultra-Wide:  >= 1920px   (2K, 4K, Curved ultra-wide monitors)
 * ==============================================================================
 */

/* ------------------------------------------------------------------------------
   1. CORE CSS VARIABLES & THEME ADAPTATION
   ------------------------------------------------------------------------------ */
:root {
  /* Dynamic Viewport Units (calculated via JS) */
  --app-height: 100vh;
  --app-vh: 1vh;
  
  /* Safe Area Insets for notched devices */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);

  /* Layout Widths */
  --sidebar-w-desktop: 260px;
  --sidebar-w-laptop: 240px;
  --sidebar-w-tablet: 220px;
  --sidebar-w-mobile: min(290px, 84vw);

  /* Fluid Spacing Scale */
  --space-2xs: clamp(2px, 0.2vw, 4px);
  --space-xs: clamp(4px, 0.5vw, 8px);
  --space-sm: clamp(8px, 1vw, 12px);
  --space-md: clamp(12px, 1.5vw, 18px);
  --space-lg: clamp(16px, 2vw, 24px);
  --space-xl: clamp(24px, 3vw, 36px);

  /* Light Theme Color Tokens */
  --ure-bg: #f8fafc;
  --ure-surface: #ffffff;
  --ure-surface-elevated: #ffffff;
  --ure-text-main: #0f172a;
  --ure-text-muted: #64748b;
  --ure-border: #e2e8f0;
  --ure-border-subtle: #f1f5f9;
  --ure-accent: #ffc107;
  --ure-accent-hover: #e0a800;
  --ure-accent-contrast: #1a1a1a;
  --ure-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --ure-shadow-md: 0 4px 14px rgba(15, 23, 42, 0.07);
  --ure-shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.10);
  --ure-card-radius: clamp(10px, 1.2vw, 16px);
  --ure-btn-radius: 10px;
  --ure-input-h: 44px;
}

/* Dark Theme Color Tokens */
[data-theme="dark"],
html[data-theme="dark"] body {
  --ure-bg: #0f1117;
  --ure-surface: #181b22;
  --ure-surface-elevated: #20242e;
  --ure-text-main: #f8fafc;
  --ure-text-muted: #94a3b8;
  --ure-border: rgba(255, 255, 255, 0.10);
  --ure-border-subtle: rgba(255, 255, 255, 0.05);
  --ure-accent: #ffc107;
  --ure-accent-hover: #ffd54f;
  --ure-accent-contrast: #000000;
  --ure-shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.35);
  --ure-shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
  --ure-shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.60);
}

/* ------------------------------------------------------------------------------
   2. GLOBAL FLUID TYPOGRAPHY & RESET ENHANCEMENTS
   ------------------------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  min-height: 100%;
  min-height: var(--app-height, 100vh);
  overflow-x: hidden !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch;
  font-size: clamp(13.5px, 0.88rem + 0.18vw, 15.5px);
  line-height: 1.55;
  background-color: var(--ure-bg) !important;
  color: var(--ure-text-main) !important;
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}

/* Fluid Heading Scale */
h1, .h1 { font-size: clamp(1.45rem, 1.15rem + 1.25vw, 2.2rem) !important; }
h2, .h2 { font-size: clamp(1.25rem, 1.05rem + 0.85vw, 1.75rem) !important; }
h3, .h3 { font-size: clamp(1.10rem, 0.95rem + 0.55vw, 1.45rem) !important; }
h4, .h4 { font-size: clamp(0.98rem, 0.90rem + 0.35vw, 1.22rem) !important; }
h5, .h5 { font-size: clamp(0.90rem, 0.85rem + 0.20vw, 1.05rem) !important; }

/* ------------------------------------------------------------------------------
   3. UNIVERSAL CONTAINER & MAIN CONTENT FLOW
   ------------------------------------------------------------------------------ */
.main {
  min-height: 100vh;
  min-height: var(--app-height, 100vh);
  width: auto;
  max-width: 100%;
  transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
  padding: var(--space-md) max(var(--space-md), var(--safe-right)) calc(var(--space-xl) + var(--safe-bottom)) max(var(--space-md), var(--safe-left));
}

/* Container boundary enforcement */
.container, .container-fluid, .container-lg, .container-xl {
  width: 100%;
  max-width: 100%;
  padding-left: var(--space-sm);
  padding-right: var(--space-sm);
  margin-left: auto;
  margin-right: auto;
}

/* ------------------------------------------------------------------------------
   4. DEVICE-SPECIFIC ADAPTIVE BREAKPOINTS
   ------------------------------------------------------------------------------ */

/* === MOBILE PHONES (All Mobile < 768px) === */
@media (max-width: 767.98px) {
  .main {
    margin-left: 0 !important;
    padding-left: 10px !important;
    padding-right: 10px !important;
    padding-top: 56px !important; /* Space for mobile navbar/toggle */
  }

  /* Fixed Mobile Header / Brandbar */
  .brandbar {
    position: sticky !important;
    top: 0 !important;
    z-index: 1040 !important;
    padding: 8px 12px 8px 52px !important;
    background: var(--ure-surface) !important;
    border-bottom: 1px solid var(--ure-border) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  /* Sidebar Drawer on Mobile */
  .sidebar {
    width: var(--sidebar-w-mobile) !important;
    max-width: 85vw !important;
    left: calc(-1 * var(--sidebar-w-mobile)) !important;
    top: 0 !important;
    bottom: 0 !important;
    height: 100% !important;
    height: var(--app-height, 100vh) !important;
    z-index: 1060 !important;
    box-shadow: none;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), left 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  }

  body.sidebar-mobile-open .sidebar {
    left: 0 !important;
    box-shadow: 8px 0 30px rgba(0, 0, 0, 0.35) !important;
  }

  /* Backdrop Overlay */
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 1055;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }

  body.sidebar-mobile-open .sidebar-backdrop {
    opacity: 1;
    visibility: visible;
  }

  /* Sidebar Toggle Button on Mobile */
  #sidebarToggle {
    position: fixed !important;
    top: 8px !important;
    left: 8px !important;
    z-index: 1045 !important;
    min-width: 40px !important;
    min-height: 40px !important;
    border-radius: 10px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  /* Form Controls on Mobile: Prevent iOS zoom by ensuring min 16px */
  input[type="text"],
  input[type="number"],
  input[type="email"],
  input[type="password"],
  input[type="tel"],
  input[type="date"],
  input[type="search"],
  select.form-select,
  textarea.form-control {
    font-size: 16px !important;
    min-height: 44px !important;
    padding: 8px 12px !important;
    border-radius: var(--ure-btn-radius) !important;
  }

  /* Grid Column Stacking on Mobile */
  .row.g-2, .row.g-3, .row.g-4 {
    margin-left: -6px !important;
    margin-right: -6px !important;
  }
  .row.g-2 > *, .row.g-3 > *, .row.g-4 > * {
    padding-left: 6px !important;
    padding-right: 6px !important;
  }

  /* Card and Statbox Mobile Adaptations */
  .card, .card-stat {
    padding: 12px 14px !important;
    border-radius: 12px !important;
    margin-bottom: 10px !important;
  }

  /* Horizontal action button stacks */
  .btn-group {
    display: inline-flex !important;
    flex-wrap: wrap !important;
    gap: 4px !important;
  }
  .btn-group > .btn {
    border-radius: 6px !important;
    margin-right: 0 !important;
  }

  /* Buttons on Mobile: Minimum 44px touch target */
  .btn {
    min-height: 38px;
    padding: 7px 14px;
    font-size: 0.88rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }

  /* Mobile Tabs & Pills: Horizontal Scroll with no scrollbars */
  .nav-pills, .nav-tabs, .subtab-nav {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding-bottom: 6px !important;
    scrollbar-width: none !important;
    gap: 6px !important;
  }
  .nav-pills::-webkit-scrollbar,
  .nav-tabs::-webkit-scrollbar,
  .subtab-nav::-webkit-scrollbar {
    display: none !important;
  }
  .nav-pills .nav-link,
  .nav-tabs .nav-link,
  .subtab-nav .nav-link {
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    font-size: 0.84rem !important;
    padding: 8px 14px !important;
  }

  /* Student Dashboard Specific Responsive Rules */
  .todo-sidebar {
    width: 100% !important;
    margin-bottom: 12px !important;
  }
  .todo-main {
    min-width: 0 !important;
    width: 100% !important;
  }
  .todo-grid {
    grid-template-columns: 1fr !important;
  }
  .study-tab-btn {
    padding: 8px 14px !important;
    font-size: 0.85rem !important;
  }
}

/* === EXTRA SMALL MOBILE (< 360px) === */
@media (max-width: 359.98px) {
  .seat-grid {
    grid-template-columns: repeat(3, 1fr) !important;
  }
  .main {
    padding-left: 6px !important;
    padding-right: 6px !important;
  }
  .card, .card-stat {
    padding: 10px 12px !important;
  }
  .btn {
    font-size: 0.80rem !important;
    padding: 6px 10px !important;
  }
}

/* === TABLETS & SMALL LAPTOPS (768px to 1024px) === */
@media (min-width: 768px) and (max-width: 1024px) {
  .sidebar {
    width: var(--sidebar-w-tablet) !important;
    left: 0 !important;
  }
  .main {
    margin-left: var(--sidebar-w-tablet) !important;
    width: calc(100% - var(--sidebar-w-tablet)) !important;
    max-width: calc(100vw - var(--sidebar-w-tablet)) !important;
    box-sizing: border-box !important;
    min-width: 0 !important;
    padding: 18px 20px !important;
  }
  body.sidebar-desktop-closed .sidebar {
    left: calc(-1 * var(--sidebar-w-tablet)) !important;
  }
  body.sidebar-desktop-closed .main {
    margin-left: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  /* 2-column or 3-column optimal tablet grid */
  .col-md-3 {
    flex: 0 0 50% !important;
    max-width: 50% !important;
  }
  .col-md-4 {
    flex: 0 0 50% !important;
    max-width: 50% !important;
  }
  .col-md-6 {
    flex: 0 0 100% !important;
    max-width: 100% !important;
  }

  .card, .card-stat {
    padding: 16px 18px !important;
    border-radius: 14px !important;
  }
}

/* === STANDARD LAPTOPS (1025px to 1366px) === */
@media (min-width: 1025px) and (max-width: 1366px) {
  .sidebar {
    width: var(--sidebar-w-laptop) !important;
  }
  .main {
    margin-left: var(--sidebar-w-laptop) !important;
    width: calc(100% - var(--sidebar-w-laptop)) !important;
    max-width: calc(100vw - var(--sidebar-w-laptop)) !important;
    box-sizing: border-box !important;
    min-width: 0 !important;
    padding: 22px 26px !important;
  }
  body.sidebar-desktop-closed .sidebar {
    left: calc(-1 * var(--sidebar-w-laptop)) !important;
  }
  body.sidebar-desktop-closed .main {
    margin-left: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  .card, .card-stat {
    padding: 18px 22px !important;
  }
}

/* === DESKTOP & LARGE SCREENS (1367px to 1919px) === */
@media (min-width: 1367px) {
  .sidebar {
    width: var(--sidebar-w-desktop) !important;
  }
  .main {
    margin-left: var(--sidebar-w-desktop) !important;
    width: calc(100% - var(--sidebar-w-desktop)) !important;
    max-width: calc(100vw - var(--sidebar-w-desktop)) !important;
    box-sizing: border-box !important;
    min-width: 0 !important;
    padding: 24px 34px !important;
  }
  body.sidebar-desktop-closed .sidebar {
    left: calc(-1 * var(--sidebar-w-desktop)) !important;
  }
  body.sidebar-desktop-closed .main {
    margin-left: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  .card, .card-stat {
    padding: 20px 24px !important;
  }
}

/* === ULTRA-WIDE MONITORS (>= 1920px) === */
@media (min-width: 1920px) {
  .main {
    padding-left: 48px !important;
    padding-right: 48px !important;
  }
  /* Constrain maximum reading line length */
  .main > .container-fluid,
  .main > .container {
    max-width: 1800px !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }
}

/* ------------------------------------------------------------------------------
   5. BULLETPROOF TABLE RESPONSIVENESS
   ------------------------------------------------------------------------------ */
.table-responsive,
div[data-lenis-prevent].table-responsive {
  width: 100% !important;
  max-width: 100% !important;
  overflow-x: auto !important;
  overflow-y: hidden !important;
  -webkit-overflow-scrolling: touch !important;
  touch-action: pan-x pan-y !important;
  border-radius: var(--ure-card-radius);
  margin-bottom: var(--space-md);
  position: relative;
}

/* Table scroll visual hints (fade gradient on edges) */
.table-responsive.has-overflow-right::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 24px;
  pointer-events: none;
  background: linear-gradient(to right, transparent, var(--ure-surface));
  z-index: 5;
  transition: opacity 0.2s ease;
}

/* Clean Custom Scrollbar for Tables */
.table-responsive::-webkit-scrollbar {
  height: 6px;
}
.table-responsive::-webkit-scrollbar-track {
  background: var(--ure-border-subtle);
  border-radius: 4px;
}
.table-responsive::-webkit-scrollbar-thumb {
  background: var(--ure-text-muted);
  opacity: 0.4;
  border-radius: 4px;
}
.table-responsive::-webkit-scrollbar-thumb:hover {
  background: var(--ure-accent);
}

/* Universal Table Styling */
table.table {
  width: 100% !important;
  margin-bottom: 0 !important;
  color: var(--ure-text-main) !important;
  border-color: var(--ure-border) !important;
  vertical-align: middle;
}
table.table th {
  background-color: var(--ure-surface) !important;
  color: var(--ure-text-main) !important;
  font-weight: 600;
  border-bottom: 2px solid var(--ure-accent) !important;
  white-space: nowrap;
}
table.table td {
  border-bottom: 1px solid var(--ure-border) !important;
  color: var(--ure-text-main) !important;
}

/* ------------------------------------------------------------------------------
   6. CARDS, MODALS & DIALOGS
   ------------------------------------------------------------------------------ */
.card, .card-stat {
  background-color: var(--ure-surface) !important;
  border: 1px solid var(--ure-border) !important;
  color: var(--ure-text-main) !important;
  box-shadow: var(--ure-shadow-sm) !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.3s ease;
}
.card:hover, .card-stat:hover {
  box-shadow: var(--ure-shadow-md) !important;
}

/* Modals on Mobile: Bottom Sheet Style with Max Height Fix */
@media (max-width: 575.98px) {
  .modal-dialog {
    margin: 0 !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    max-width: 100% !important;
  }
  .modal-content {
    border-radius: 18px 18px 0 0 !important;
    max-height: calc(var(--app-vh, 1vh) * 88) !important;
    overflow-y: auto !important;
    border-bottom: none !important;
    padding-bottom: var(--safe-bottom);
  }
}

/* ------------------------------------------------------------------------------
   7. DARK / LIGHT SEAMLESS COLOR HARMONY
   ------------------------------------------------------------------------------ */
[data-theme="dark"] .bg-white,
[data-theme="dark"] .bg-light {
  background-color: var(--ure-surface) !important;
  color: var(--ure-text-main) !important;
  border-color: var(--ure-border) !important;
}

[data-theme="dark"] .text-dark {
  color: var(--ure-text-main) !important;
}

[data-theme="dark"] .text-muted {
  color: var(--ure-text-muted) !important;
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: var(--ure-surface-elevated) !important;
  border-color: var(--ure-border) !important;
  color: var(--ure-text-main) !important;
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  border-color: var(--ure-accent) !important;
  box-shadow: 0 0 0 0.25rem rgba(255, 193, 7, 0.25) !important;
}



/* ------------------------------------------------------------------------------
   9. PRINT MEDIA STYLES & BULLETPROOF WATERMARK
   ------------------------------------------------------------------------------ */
@media print {
  .sidebar, #sidebarToggle, .brandbar, .btn, .no-print {
    display: none !important;
  }
  .main {
    margin-left: 0 !important;
    padding: 0 !important;
  }
  body, html {
    background: #ffffff !important;
    color: #000000 !important;
  }

  /* Universal Watermark Layering — Always visible, never hidden by card/table boxes */
  .global-print-watermark,
  .print-watermark,
  .receipt-watermark {
    display: block !important;
    position: fixed !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    width: 60vw !important;
    max-width: 460px !important;
    height: auto !important;
    object-fit: contain !important;
    opacity: 0.13 !important;
    z-index: 9999 !important;
    pointer-events: none !important;
    mix-blend-mode: multiply !important;
    filter: grayscale(10%) !important;
  }

  /* Force transparent backgrounds so watermark shines through clearly */
  .card, .card-stat, table, tr, td, th, .bg-white, .bg-light, .bg-transparent-print {
    background: transparent !important;
    background-color: transparent !important;
    box-shadow: none !important;
  }
}