:root {
  --ink: #14213D;
  --ink-soft: #4B5875;
  --paper: #F6F7FB;
  --paper-alt: #EEF0F8;
  --surface: #FFFFFF;
  --line: #E1E4EE;
  --marigold: #FFB627;
  --marigold-ink: #6B4300;
  --teal: #1C7C68;
  --coral: #E15554;
  --shadow: 0 20px 40px -20px rgba(20,33,61,0.15);
}

html.dark {
  --ink: #ECEEF5;
  --ink-soft: #AEB4C7;
  --paper: #0B111F;
  --paper-alt: #131A2C;
  --surface: #131A2C;
  --line: #232C42;
  --marigold: #FFC65C;
  --marigold-ink: #2B1B00;
  --teal: #37C9A4;
  --coral: #FF8482;
  --shadow: 0 20px 40px -20px rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }

html, body {
  overflow-x: hidden;
  max-width: 100vw;
  width: 100%;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  color: var(--ink);
  background: var(--paper);
  min-height: 100vh;
  transition: background .25s ease, color .25s ease;
}

h1, h2, h3, h4 { font-family: 'Bricolage Grotesque', sans-serif; margin: 0; letter-spacing: -0.01em; }
p { margin: 0; color: var(--ink-soft); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.mono, .mono-strong, .slug-suffix, .url-text, .badge, .eyebrow {
  font-family: 'IBM Plex Mono', monospace;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .12s ease, background .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--marigold); color: var(--marigold-ink); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--paper-alt); }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-outline:hover { border-color: var(--ink-soft); }
.btn-lg { padding: 13px 24px; font-size: 15.5px; }
.btn-block { width: 100%; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}
.icon-btn:hover { background: var(--paper-alt); }

.wordmark { display: flex; align-items: center; gap: 10px; }
.wordmark-text {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.auth-aside .wordmark-text { color: #FFFFFF; }

.wordmark-badge {
  font-size: 10.5px;
  font-weight: 600;
  background: var(--marigold);
  color: var(--marigold-ink);
  padding: 2px 6px;
  border-radius: 5px;
}

/* Auth Shell Layout */
.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
}

.auth-aside {
  background: #14213D;
  color: #FFFFFF;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  font-size: 13.5px;
  font-weight: 600;
  color: #C6CCDD;
  padding: 0;
  width: fit-content;
}
.back-link:hover { color: #FFFFFF; }

.auth-aside-body { max-width: 400px; margin: auto 0; }
.auth-aside-body h2 { font-size: 28px; color: #FFFFFF; margin: 22px 0 10px; }
.auth-aside-body p { color: #B7BED1; font-size: 14.5px; margin-bottom: 24px; }
.aside-foot { font-size: 12.5px; color: #8891A8; }

/* Mock Browser Card */
.browser-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: background .25s ease, border-color .25s ease;
}

.browser-chrome {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-alt);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ink-soft) 30%, transparent);
}

.browser-url {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 5px 10px;
  font-size: 12px;
  color: var(--ink-soft);
}

/* Dark Navy Aside Browser Card Override */
.auth-aside .browser-card {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.12);
  box-shadow: none;
}

.auth-aside .browser-chrome {
  background: rgba(255,255,255,0.05);
  border-bottom-color: rgba(255,255,255,0.1);
}

.auth-aside .dot {
  background: rgba(255,255,255,0.2);
}

.auth-aside .browser-url {
  background: rgba(0,0,0,0.2);
  border-color: rgba(255,255,255,0.1);
  color: #B7BED1;
}

/* Student Portal Mock UI */
.student-preview {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.student-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.auth-aside .student-header {
  border-bottom-color: rgba(255,255,255,0.1);
}

.student-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--marigold);
  color: var(--marigold-ink);
  font-weight: 800;
  font-size: 12.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.student-meta { display: flex; flex-direction: column; gap: 2px; }
.student-name { font-size: 13.5px; font-weight: 700; color: var(--ink); }
.auth-aside .student-name { color: #FFFFFF; }

.student-role { font-size: 11px; color: var(--ink-soft); }
.auth-aside .student-role { color: #B7BED1; }

.preview-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.preview-card {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
}
.auth-aside .preview-card {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.08);
}

.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.subject-title { font-size: 11.5px; font-weight: 600; color: var(--ink); }
.auth-aside .subject-title { color: #FFFFFF; }

.subject-pct { font-size: 11px; font-weight: 700; color: var(--marigold-ink); font-family: 'IBM Plex Mono', monospace; }
html.dark .subject-pct, .auth-aside .subject-pct { color: var(--marigold); }

.progress-track { height: 5px; background: var(--line); border-radius: 3px; overflow: hidden; }
.auth-aside .progress-track { background: rgba(255,255,255,0.1); }

.progress-fill { height: 100%; background: var(--marigold); border-radius: 3px; }
.progress-fill.teal { background: var(--teal); }

.next-task { display: block; font-size: 10.5px; color: var(--ink-soft); margin-top: 6px; }
.auth-aside .next-task { color: #B7BED1; }

.live-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  background: color-mix(in srgb, var(--teal) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--teal) 30%, transparent);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 11.5px;
  color: var(--teal);
  font-weight: 600;
}
.auth-aside .live-banner {
  background: color-mix(in srgb, var(--teal) 20%, transparent);
  border-color: color-mix(in srgb, var(--teal) 40%, transparent);
  color: #37C9A4;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
  flex-shrink: 0;
}

/* Admin Management Console Mock UI */
.admin-preview {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.admin-top-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.stat-pill {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  text-align: center;
}
.auth-aside .stat-pill {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.08);
}

.stat-pill.highlight {
  background: color-mix(in srgb, var(--teal) 14%, transparent);
  border-color: color-mix(in srgb, var(--teal) 30%, transparent);
}

.stat-num {
  display: block;
  font-size: 13px;
  font-weight: 800;
  color: var(--ink);
  font-family: 'IBM Plex Mono', monospace;
}
.auth-aside .stat-num { color: #FFFFFF; }

.stat-lbl {
  font-size: 10px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.auth-aside .stat-lbl { color: #B7BED1; }

.admin-widget-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.widget-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
}
.auth-aside .widget-row {
  background: rgba(255,255,255,0.05);
  border: none;
}

.widget-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  background: var(--surface);
}
.auth-aside .widget-icon {
  background: rgba(255,255,255,0.08);
}

.widget-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.widget-title { font-size: 11.5px; font-weight: 700; color: var(--ink); }
.auth-aside .widget-title { color: #FFFFFF; }

.widget-sub { font-size: 10.5px; color: var(--ink-soft); }
.auth-aside .widget-sub { color: #B7BED1; }

.status-badge {
  font-size: 9.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
  font-family: 'IBM Plex Mono', monospace;
}
.status-badge.active { background: color-mix(in srgb, var(--teal) 25%, transparent); color: var(--teal); }
.auth-aside .status-badge.active { color: #37C9A4; }

.status-badge.pending { background: color-mix(in srgb, var(--marigold) 25%, transparent); color: var(--marigold-ink); }
html.dark .status-badge.pending, .auth-aside .status-badge.pending { color: #FFC65C; }

.admin-actions-bar {
  display: flex;
  gap: 8px;
}
.action-btn {
  flex: 1;
  text-align: center;
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-soft);
}
.auth-aside .action-btn {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
  color: #C6CCDD;
}

/* Auth Form Side */
.auth-form-side {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  background: var(--paper);
}
.theme-float { position: absolute; top: 24px; right: 24px; }
.form-wrap { width: 100%; max-width: 400px; }
.form-head h1 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.form-head p { font-size: 14px; margin-bottom: 24px; color: var(--ink-soft); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--teal);
  background: color-mix(in srgb, var(--teal) 12%, transparent);
  padding: 4px 9px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.form { display: flex; flex-direction: column; gap: 16px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; font-weight: 600; color: var(--ink-soft); }

.input-icon {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 12px;
  background: var(--surface);
  color: var(--ink-soft);
}
.input-icon input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  padding: 12px 0;
  font-size: 14.5px;
  color: var(--ink);
  font-weight: 400;
  font-family: inherit;
}
.input-adornment {
  background: none;
  border: none;
  color: var(--ink-soft);
  display: flex;
  padding: 4px;
  cursor: pointer;
}

.form-row-between { display: flex; align-items: center; justify-content: space-between; }
.checkbox { display: flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 400; color: var(--ink-soft); }
.link-inline { background: none; border: none; padding: 0; color: var(--teal); font-weight: 600; font-size: inherit; cursor: pointer; text-decoration: none; }
.link-inline:hover { text-decoration: underline; }

.form-foot { margin-top: 24px; font-size: 13.5px; text-align: center; color: var(--ink-soft); }

.social-auth { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.social-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--ink-soft);
  margin: 12px 0;
}
.social-divider::before, .social-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}

.social-btns { display: flex; gap: 10px; }
.social-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 600;
  background: var(--surface);
  color: var(--ink);
  transition: background .15s ease;
}
.social-btn:hover { background: var(--paper-alt); }

/* Alert message */
.alert {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13.5px;
  margin-bottom: 18px;
}
.alert-danger {
  background: color-mix(in srgb, var(--coral) 12%, transparent);
  border: 1px solid var(--coral);
  color: var(--coral);
}
.alert-success {
  background: color-mix(in srgb, var(--teal) 12%, transparent);
  border: 1px solid var(--teal);
  color: var(--teal);
}

/* Demo Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 17, 31, 0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.modal-backdrop.open { opacity: 1; pointer-events: auto; }
.modal-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  width: 100%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px;
  box-shadow: var(--shadow);
  position: relative;
  color: var(--ink);
}
.modal-card h2 { font-size: 24px; margin-bottom: 8px; }
.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.modal-card .form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}
.modal-card .form input,
.modal-card .form select,
.modal-card .form textarea {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 12px;
  background: var(--surface);
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
  outline: none;
}
.modal-card .form input:focus,
.modal-card .form select:focus,
.modal-card .form textarea:focus {
  border-color: var(--teal);
}

/* Cookie Consent Banner */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  right: 24px;
  max-width: 400px;
  width: calc(100% - 48px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform .3s ease, opacity .3s ease;
}

.cookie-banner-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cookie-banner-head h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.cookie-banner p {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.5;
  margin: 0;
}

.cookie-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

/* Touch-Friendly Ergonomics & Responsive Breakpoints */
.input-icon { min-height: 48px; }
.btn-lg { min-height: 48px; }
.social-btn { min-height: 44px; }
.input-adornment { min-width: 36px; min-height: 36px; align-items: center; justify-content: center; }

@media (max-width: 900px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-aside { display: none; }
  .auth-form-side { padding: 48px 24px; min-height: 100vh; }
}

@media (max-width: 640px) {
  .auth-form-side { padding: 36px 20px; }
  .form-wrap { max-width: 100%; }
  .form-head h1 { font-size: 24px; }
  .modal-card { padding: 24px 18px; }
  .cookie-banner {
    bottom: 16px;
    right: 16px;
    left: 16px;
    width: auto;
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .auth-form-side { padding: 28px 16px; }
  .theme-float { top: 16px; right: 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .social-btns { flex-direction: column; gap: 8px; }
}