/* ═══════════════════════════════════════════════════
   i-CMS  ·  ANIMATED LOGO
═══════════════════════════════════════════════════ */

/* Color cycle: Orange → Cyan → Purple → Pink */
@keyframes icms-color-cycle {
  0%   { color: #ff6b00; text-shadow: 0 0 12px rgba(255,107,0,.95), 0 0 32px rgba(255,107,0,.6), 0 0 68px rgba(255,107,0,.28); }
  25%  { color: #00d4ff; text-shadow: 0 0 12px rgba(0,212,255,.95), 0 0 32px rgba(0,212,255,.6), 0 0 68px rgba(0,212,255,.28); }
  50%  { color: #8b5cf6; text-shadow: 0 0 12px rgba(139,92,246,.95), 0 0 32px rgba(139,92,246,.6), 0 0 68px rgba(139,92,246,.28); }
  75%  { color: #ff0080; text-shadow: 0 0 12px rgba(255,0,128,.95), 0 0 32px rgba(255,0,128,.6), 0 0 68px rgba(255,0,128,.28); }
  100% { color: #ff6b00; text-shadow: 0 0 12px rgba(255,107,0,.95), 0 0 32px rgba(255,107,0,.6), 0 0 68px rgba(255,107,0,.28); }
}

@keyframes icms-shimmer {
  0%   { transform: translateX(-130%) skewX(-18deg); opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { transform: translateX(260%) skewX(-18deg); opacity: 0; }
}

@keyframes icms-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.78; }
}

/* Logo container */
.icms-logo-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  user-select: none;
}

/* Text wrapper — clips shimmer sweep */
.icms-text-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  padding: 0 2px;
}

/* Shimmer overlay */
.icms-text-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 36%;
  background: linear-gradient(
    108deg,
    transparent 20%,
    rgba(255,255,255,0.24) 50%,
    transparent 80%
  );
  pointer-events: none;
  display: none;
}

/* Main i-CMS text */
.icms-logo-text {
  display: block;
  font-family: 'Orbitron', 'Exo 2', 'Plus Jakarta Sans', sans-serif;
  font-size: 1.55rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  background: linear-gradient(135deg, #ff7a18 0%, #f97316 36%, #1d4ed8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

/* Brand modifier — hero size */
.icms-logo--brand .icms-logo-text {
  font-size: 3.4rem;
  letter-spacing: 0.22em;
}

/* DV Analytics mini badge */
.icms-dv-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  opacity: 0.58;
  transition: opacity 0.3s ease;
  margin-top: 1px;
}

.icms-logo--brand .icms-dv-badge {
  opacity: 0.68;
  margin-top: 6px;
  gap: 7px;
}

.icms-dv-badge:hover { opacity: 0.92; }

.icms-dv-by {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: #666;
  white-space: nowrap;
}

.icms-logo--brand .icms-dv-by {
  font-size: 0.72rem;
}

.icms-dv-img {
  width: 52px;
  height: auto;
  display: block;
  filter: drop-shadow(1px 0 0 #fff)
          drop-shadow(-1px 0 0 #fff)
          drop-shadow(0 1px 0 #fff)
          drop-shadow(0 -1px 0 #fff);
}

.icms-logo--brand .icms-dv-img {
  width: 84px;
}

/* ====================================
   GLOBAL STYLES & VARIABLES
   ==================================== */

:root {
  /* Color Palette - Academic Theme */
  --primary-color: #003d82;      /* Deep Blue */
  --primary-light: #1a5bb3;      /* Light Blue */
  --primary-lighter: #e8f1f9;    /* Very Light Blue */
  --secondary-color: #ff5722;    /* Orange Accent */
  --secondary-light: #ffb99f;    /* Light Orange */
  --success-color: #4caf50;      /* Green */
  --error-color: #f44336;        /* Red */
  --warning-color: #ff9800;      /* Orange */
  --dark-gray: #333333;          /* Dark Gray */
  --medium-gray: #666666;        /* Medium Gray */
  --light-gray: #f5f5f5;         /* Light Gray */
  --white: #ffffff;              /* White */
  
  /* Typography */
  --font-family-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 20px;
  --font-size-xlarge: 28px;
  --font-size-title: 48px;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border & Shadow */
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
  
  /* Transitions */
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

/* ====================================
   RESET & BASE STYLES
   ==================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--dark-gray);
  background-color: var(--white);
  overflow-x: hidden;
}

/* ====================================
   TYPOGRAPHY
   ==================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-title);
}

h2 {
  font-size: var(--font-size-xlarge);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ====================================
   NAVIGATION BAR
   ==================================== */

.navbar {
  background-color: var(--white);
  color: var(--dark-gray);
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-large);
  font-weight: 600;
}

.navbar-logo {
  height: 40px;
  width: auto;
}

.navbar-text {
  color: var(--white);
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--dark-gray);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-color);
}

/* ====================================
   HERO SECTION
   ==================================== */

.hero {
  background-color: var(--white);
  color: var(--dark-gray);
  padding: var(--spacing-2xl) var(--spacing-md);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-content {
  max-width: 600px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-logo {
  margin-bottom: var(--spacing-xl);
}

.logo-large {
  height: 120px;
  width: auto;
  animation: slideDown 0.8s ease-out;
}

.hero-title {
  font-size: var(--font-size-title);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  color: var(--primary-color);
  animation: slideDown 0.8s ease-out 0.1s backwards;
}

.hero-subtitle {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-md);
  color: var(--medium-gray);
  opacity: 0.95;
  animation: slideDown 0.8s ease-out 0.2s backwards;
}

.hero-description {
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-base);
  opacity: 0.9;
}

.hero-description p {
  margin-bottom: 0;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ====================================
   BUTTONS
   ==================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:active::before {
  width: 300px;
  height: 300px;
}

/* Button Variants */

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
  background-color: var(--light-gray);
  color: var(--dark-gray);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-lighter);
}

.btn-danger {
  background-color: var(--error-color);
  color: var(--white);
}

.btn-danger:hover {
  background-color: #d32f2f;
}

/* Button Sizes */

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-large);
  min-width: 200px;
}

.btn-block {
  width: 100%;
  display: flex;
  justify-content: center;
}

.btn-text {
  position: relative;
  z-index: 1;
}

.btn-icon {
  position: relative;
  z-index: 1;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

/* ====================================
   MODALS
   ==================================== */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

.modal-container {
  position: relative;
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease-out;
  z-index: 1001;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--light-gray);
}

.modal-title {
  margin: 0;
  font-size: var(--font-size-xlarge);
  color: var(--primary-color);
}

.modal-close {
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--medium-gray);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--primary-color);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  text-align: center;
}

.modal-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: stretch;
  align-items: stretch;
}

.modal-actions .btn {
  flex: 1 1 0;
  min-width: 0;
  white-space: normal;
  line-height: 1.25;
  text-align: center;
}

.modal-alert {
  max-width: 400px;
}

.modal-alert .modal-header {
  justify-content: center;
  border-bottom: none;
  padding-bottom: 0;
}

.modal-alert .modal-title {
  text-align: center;
}

.modal-alert .modal-body {
  padding-top: var(--spacing-md);
}

.modal-loading {
  max-width: 350px;
  text-align: center;
}

.modal-container.modal-issue {
  max-width: 560px;
}

.alert-content {
  text-align: center;
  padding: var(--spacing-sm) var(--spacing-md) var(--spacing-lg);
}

.alert-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 38px;
  font-weight: 700;
  color: var(--error-color);
  background: rgba(244, 67, 54, 0.12);
  border: 2px solid rgba(244, 67, 54, 0.18);
}

.alert-message {
  font-size: var(--font-size-large);
  font-weight: 600;
  color: var(--dark-gray);
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.alert-submessage {
  font-size: var(--font-size-small);
  color: var(--medium-gray);
}

/* ====================================
   FORMS
   ==================================== */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group.checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--dark-gray);
}

.form-label-small {
  font-weight: 500;
  color: var(--medium-gray);
  font-size: var(--font-size-small);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--light-gray);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family-primary);
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: var(--primary-lighter);
}

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

.form-checkbox {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary-color);
}

.form-error {
  display: block;
  color: var(--error-color);
  font-size: var(--font-size-small);
  margin-top: var(--spacing-xs);
  min-height: 20px;
}

.help-text {
  font-size: var(--font-size-small);
  color: var(--medium-gray);
  margin: 0;
}

/* ====================================
   TOASTS
   ==================================== */

.toast {
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  max-width: 400px;
  z-index: 2000;
  animation: slideInRight 0.3s ease-out;
}

.toast.hidden {
  display: none;
}

.toast-error {
  border-left: 4px solid var(--error-color);
}

.toast-success {
  border-left: 4px solid var(--success-color);
}

.toast-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.toast-icon {
  font-size: 20px;
  font-weight: bold;
}

.toast-error .toast-icon {
  color: var(--error-color);
}

.toast-success .toast-icon {
  color: var(--success-color);
}

.toast-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--medium-gray);
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: var(--dark-gray);
}

/* ====================================
   LOADERS & SPINNERS
   ==================================== */

.loader {
  border: 3px solid var(--light-gray);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
}

.loader.hidden {
  display: none;
}

.spinner {
  border: 4px solid var(--primary-lighter);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

.loading-text {
  color: var(--medium-gray);
  font-size: var(--font-size-base);
}

/* ====================================
   ANIMATIONS
   ==================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */

@media (max-width: 768px) {
  :root {
    --font-size-title: 32px;
    --font-size-xlarge: 24px;
    --spacing-2xl: 32px;
  }

  .navbar-container {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .navbar-menu {
    gap: var(--spacing-md);
  }

  .hero {
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: auto;
  }

  .logo-large {
    height: 80px;
  }

  .modal-container {
    width: 95%;
  }

  .modal-actions {
    flex-direction: column;
  }

  .modal-actions .btn {
    width: 100%;
  }

  .btn-large {
    min-width: auto;
    width: 100%;
  }

  .toast {
    left: var(--spacing-md);
    right: var(--spacing-md);
    max-width: none;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-title: 24px;
    --font-size-xlarge: 20px;
    --spacing-2xl: 24px;
  }

  .navbar-text {
    display: none;
  }

  .hero-title {
    font-size: 24px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .modal-title {
    font-size: var(--font-size-large);
  }

  .form-input {
    padding: var(--spacing-md);
    font-size: 16px;
  }
}

/* ====================================
   UTILITY CLASSES
   ==================================== */

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

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

.mt-md {
  margin-top: var(--spacing-md);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

/* ====================================
   SESSIONS SCREEN
   ==================================== */

.sessions-screen {
  background: linear-gradient(135deg, var(--primary-lighter) 0%, #f0f4f8 100%);
  min-height: 100vh;
  padding: var(--spacing-lg) var(--spacing-md);
}

.sessions-screen.hidden {
  display: none;
}

.sessions-header {
  max-width: 1200px;
  margin: 0 auto var(--spacing-2xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.sessions-header-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.sessions-header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.sessions-logo {
  height: 60px;
  width: auto;
}

.sessions-title {
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.sessions-subtitle {
  color: var(--medium-gray);
  margin-bottom: 0;
}

.btn-logout {
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-logout:hover {
  background: var(--primary-color);
  color: white;
}

.sessions-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  animation: fadeInUp 0.5s ease-out;
}

.no-sessions {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-2xl);
  background: white;
  border-radius: var(--border-radius-lg);
  color: var(--medium-gray);
}

.session-card {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  animation: slideUp 0.4s ease-out;
}

.session-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.session-card.inactive {
  border: 3px solid var(--error-color);
  background: linear-gradient(135deg, rgba(244, 67, 54, 0.02) 0%, rgba(244, 67, 54, 0.04) 100%);
}

.session-poster-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, #eef2ff 0%, #f8fafc 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.session-poster {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.session-card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--light-gray);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.session-title {
  margin: 0;
  font-size: var(--font-size-large);
  color: var(--primary-color);
}

.session-status {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.session-status.on {
  background-color: #c8e6c9;
  color: #2e7d32;
}

.session-status.off {
  background-color: #ffcdd2;
  color: #c62828;
}

.session-card-body {
  padding: var(--spacing-lg);
  flex-grow: 1;
}

.session-description {
  color: var(--medium-gray);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-small);
  line-height: 1.5;
}

.session-meta {
  font-size: 12px;
  color: #999;
  margin-bottom: 0;
  font-family: monospace;
  word-break: break-all;
}

.session-card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--light-gray);
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.session-card-footer .btn {
  flex: 1;
  font-size: var(--font-size-small);
  padding: var(--spacing-md);
}

.btn-disabled {
  background-color: var(--light-gray);
  color: var(--medium-gray);
  cursor: not-allowed;
  border: none;
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  font-weight: 600;
  flex: 1;
}

/* ====================================
   ANIMATIONS
   ==================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ====================================
   RESPONSIVE SESSIONS
   ==================================== */

@media (max-width: 768px) {
  .sessions-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
  }

  .sessions-header-content {
    width: 100%;
  }

  .btn-logout {
    width: 100%;
  }

  .sessions-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .sessions-screen {
    padding: var(--spacing-md);
  }

  .sessions-header {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
  }

  .sessions-logo {
    height: 50px;
  }

  .session-card-header {
    flex-direction: column;
  }

  .session-title {
    font-size: var(--font-size-base);
  }

  .session-card-footer {
    flex-direction: column;
  }

  .session-card-footer .btn,
  .btn-disabled {
    width: 100%;
  }
}

/* ====================================
   STUDENT UI REFRESH
   ==================================== */

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-muted: #fafafa;
  --surface-elevated: #ffffff;
  --surface-overlay: #ffffff;
  --border: #e8e8e8;
  --border-strong: #dfdfdf;
  --text: #000000;
  --text-muted: #5f6775;
  --heading: #000000;
  --primary: #e05322;
  --primary-soft: rgba(224, 83, 34, 0.08);
  --success: #4caf50;
  --success-soft: rgba(76, 175, 80, 0.08);
  --danger: #df514c;
  --danger-soft: rgba(223, 81, 76, 0.08);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.09);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.10), 0 4px 8px rgba(0, 0, 0, 0.05);
  --overlay: rgba(0, 0, 0, 0.45);
  --input-bg: #ffffff;
  --input-border: #e8e8e8;
  --input-shadow: 0 0 0 2px rgba(224, 83, 34, 0.15);
  --row-hover: #fafafa;
  --radius-sm: 4px;
  --radius-md: 4px;
  --radius-lg: 4px;
}

html[data-theme="dark"] {
  --bg: #161922;
  --surface: #191c24;
  --surface-muted: #212431;
  --surface-elevated: #1e222b;
  --surface-overlay: #1e222b;
  --border: #2d323f;
  --border-strong: #383e4d;
  --text: #cbd5e1;
  --text-muted: #8e9db0;
  --heading: #ffffff;
  --primary: #f05a28;
  --primary-soft: rgba(240, 90, 40, 0.1);
  --success: #00b852;
  --success-soft: rgba(0, 184, 82, 0.1);
  --danger: #ff5722;
  --danger-soft: rgba(255, 87, 34, 0.1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.6);
  --overlay: rgba(0, 0, 0, 0.6);
  --input-bg: #161922;
  --input-border: #2d323f;
  --input-shadow: 0 0 0 2px rgba(240, 90, 40, 0.18);
  --row-hover: #212431;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hero {
  min-height: 100vh;
  padding: 18px;
  background:
    radial-gradient(circle at top left, rgba(240, 90, 40, 0.08), transparent 30%),
    radial-gradient(circle at bottom right, rgba(240, 90, 40, 0.04), transparent 28%),
    var(--bg);
  position: relative;
}

.hero-content {
  width: min(100%, 960px);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 28px 28px 32px;
}

.hero-toolbar {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 20;
}

.theme-toggle {
  border: 0;
  background: transparent;
  padding: 0;
}

.theme-row {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.theme-row:hover,
.theme-row:focus-visible {
  border-color: var(--primary);
  background: var(--primary-soft);
  outline: none;
}

.theme-row-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.theme-row-label strong {
  font-size: 15px;
  color: var(--heading);
}

.theme-row-label small {
  font-size: 12px;
  color: var(--text-muted);
}

.theme-switch {
  width: 58px;
  height: 32px;
  flex: 0 0 58px;
  border-radius: 999px;
  background: var(--border);
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 4px;
}

.theme-switch-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transform: translateX(0);
  transition: transform 0.2s ease;
}

[data-theme-toggle][data-theme="dark"] .theme-switch-thumb {
  transform: translateX(26px);
}

.theme-toggle-compact {
  min-height: 40px;
}

.icms-dv-by,
.hero-subtitle,
.hero-description,
.sessions-subtitle,
.help-text,
.form-label-small,
.loading-text,
.session-description,
.session-meta,
.alert-submessage {
  color: var(--text-muted);
}

.icms-dv-img {
  filter: none;
}

.hero-title,
.sessions-title,
.modal-title,
.session-title,
.alert-message {
  color: var(--heading);
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  margin-bottom: 10px;
}

.hero-subtitle {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.hero-description {
  max-width: 640px;
  margin: 0 auto 24px;
}

.btn,
.btn-logout {
  min-height: 40px;
  border-radius: var(--radius-md);
  font-weight: 700;
  box-shadow: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: #d54b1d;
  box-shadow: none;
}

.btn-secondary,
.btn-logout {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover,
.btn-logout:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.sessions-screen {
  min-height: 100vh;
  padding: 18px;
  background: var(--bg);
}

.sessions-header,
.session-card,
.modal-container,
.no-sessions,
.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.sessions-header {
  margin-bottom: 18px;
}

.sessions-header-actions {
  justify-content: flex-end;
}

.sessions-container {
  gap: 16px;
}

.session-card {
  transform: none;
}

.session-card:hover {
  transform: translateY(-2px);
}

.session-card-header,
.session-card-footer,
.modal-header {
  border-color: var(--border);
}

.session-status.on {
  background: var(--success-soft);
  color: var(--success);
}

.session-status.off {
  background: var(--danger-soft);
  color: var(--danger);
}

.session-card.inactive {
  border-color: var(--danger);
  background: var(--surface);
}

.modal-overlay {
  background: var(--overlay);
}

.modal-container {
  background: var(--surface-elevated);
}

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

.modal-close,
.toast-close {
  color: var(--text-muted);
}

.modal-close:hover,
.toast-close:hover {
  color: var(--primary);
}

.form-label {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.form-input {
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  background: var(--input-bg);
  color: var(--text);
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.form-input:focus {
  border-color: var(--primary);
  background: var(--input-bg);
  box-shadow: var(--input-shadow);
}

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

.form-checkbox {
  accent-color: var(--primary);
}

.toast {
  background: var(--surface-overlay);
  color: var(--text);
}

.toast-error {
  border-left-color: var(--danger);
}

.toast-success {
  border-left-color: var(--success);
}

.loader {
  border-color: var(--border);
  border-top-color: var(--primary);
}

.spinner {
  border-color: var(--border);
  border-top-color: var(--primary);
}

.alert-icon {
  color: var(--danger);
  background: var(--danger-soft);
  border-color: transparent;
}

html[data-theme="dark"] .icms-logo-text,
html[data-theme="light"] .icms-logo-text {
  background: linear-gradient(135deg, #ff7a18 0%, #f97316 42%, #7f71d8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

@media (max-width: 768px) {
  .hero,
  .sessions-screen {
    padding: 12px;
  }

  .hero-toolbar {
    position: static;
    display: flex;
    justify-content: flex-end;
    margin-bottom: 12px;
  }

  .hero-content,
  .sessions-header {
    padding: 18px;
  }

  .sessions-header {
    flex-direction: column;
    align-items: stretch;
  }

  .sessions-header-actions {
    justify-content: flex-start;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn-large {
    width: 100%;
    min-width: 0;
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding: 18px 16px 22px;
  }

  .sessions-header {
    padding: 16px;
    margin-bottom: 16px;
  }

  .sessions-header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .sessions-header-actions,
  .session-card-footer {
    flex-direction: column;
  }

  .sessions-header-actions .btn,
  .session-card-footer .btn,
  .btn-disabled {
    width: 100%;
  }

  .modal-container {
    width: 100%;
    max-width: none;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
  }

  .modal-body {
    padding: 16px;
  }

  .toast {
    bottom: 12px;
    right: 12px;
    left: 12px;
  }
}