/* ====================================================================== *
 * File: student_shell.css
 * Location: static/css/student_shell.css
 * Description: RTL desktop sidebar, icon-collapse behavior, and mobile off-canvas student navigation.
 * Version: 1.0.0
 * Last Modified: Wed Aug 12 2026 - 06:20
 * Dependencies: app.css, Vazirmatn/Estedad typography, student_sidebar.js
 * ====================================================================== */

/* -------------------------------------------------------------------------- *
 * 1. Authenticated application frame
 * -------------------------------------------------------------------------- */

body.has-student-sidebar {
  --student-sidebar-width: 288px;
  padding-right: var(--student-sidebar-width);
  transition: padding-right 220ms ease;
}

.topbar-authenticated {
  height: 68px;
  justify-content: flex-start;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.student-sidebar-trigger {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-content: center;
  gap: 4px;
  border: 1px solid #dfe5ed;
  border-radius: 12px;
  background: #ffffff;
  color: #102746;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(13, 34, 64, 0.06);
}

.student-sidebar-trigger span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 20px;
  background: currentColor;
}

.student-sidebar-trigger:focus-visible,
.student-sidebar-link:focus-visible,
.student-sidebar-close:focus-visible {
  outline: 3px solid rgba(202, 161, 63, 0.3);
  outline-offset: 3px;
}

/* -------------------------------------------------------------------------- *
 * 2. Sidebar surface and brand
 * -------------------------------------------------------------------------- */

.student-sidebar {
  position: fixed;
  inset: 0 0 0 auto;
  z-index: 60;
  display: flex;
  width: var(--student-sidebar-width);
  height: 100svh;
  flex-direction: column;
  border-left: 1px solid #e3e8ef;
  background:
    radial-gradient(circle at 85% 0, rgba(224, 189, 104, 0.12), transparent 28%),
    #ffffff;
  color: #18304f;
  box-shadow: -12px 0 36px rgba(12, 33, 63, 0.05);
  transition: width 220ms ease, transform 220ms ease;
}

.student-sidebar-header {
  display: flex;
  min-height: 80px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid #edf0f4;
}

.student-sidebar-brand {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 11px;
}

.student-sidebar-mark {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(145deg, #163966, #0b254a);
  color: #e4c36e;
  font-size: 1.18rem;
  font-weight: 900;
  box-shadow: 0 9px 22px rgba(10, 37, 76, 0.2);
}

.student-sidebar-mark img {
  display: block;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  object-fit: contain;
}

.student-sidebar-brand-copy,
.student-sidebar-user {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.student-sidebar-brand-copy strong,
.student-sidebar-user strong {
  overflow: hidden;
  font-size: 0.92rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.student-sidebar-brand-copy small,
.student-sidebar-user small {
  color: #8490a2;
  font-size: 0.7rem;
  white-space: nowrap;
}

.student-sidebar-close {
  display: none;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 10px;
  background: #f3f5f8;
  color: #526075;
  font-size: 1.4rem;
  cursor: pointer;
}

/* -------------------------------------------------------------------------- *
 * 3. Navigation groups and links
 * -------------------------------------------------------------------------- */

.student-sidebar-nav {
  flex: 1;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 15px 12px 24px;
  scrollbar-width: thin;
  scrollbar-color: #d6dde7 transparent;
}

.student-sidebar-section + .student-sidebar-section {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #edf0f4;
}

.student-sidebar-section h2 {
  margin: 0 10px 9px;
  color: #98a1af;
  font-size: 0.69rem;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.student-sidebar-link {
  display: flex;
  width: 100%;
  min-height: 46px;
  align-items: center;
  gap: 12px;
  margin: 3px 0;
  padding: 10px 13px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: #526178;
  font-size: 0.88rem;
  font-weight: 650;
  text-align: right;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.student-sidebar-link svg,
.student-sidebar-footer svg {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.student-sidebar-link:hover {
  background: #f3f6fa;
  color: #12365f;
  transform: translateX(-2px);
}

.student-sidebar-link.is-active {
  background: linear-gradient(135deg, #123a68, #0b2a52);
  color: #ffffff;
  box-shadow: 0 10px 23px rgba(11, 42, 82, 0.17);
}

.student-sidebar-link.is-active svg {
  color: #e7c873;
}

.student-sidebar-link.is-disabled {
  cursor: default;
  opacity: 0.5;
}

.student-sidebar-details summary {
  list-style: none;
}

.student-sidebar-details summary::-webkit-details-marker {
  display: none;
}

.student-sidebar-details summary b {
  margin-right: auto;
  color: #99a3b2;
  font-size: 1rem;
  transition: transform 160ms ease;
}

.student-sidebar-details[open] summary b {
  transform: rotate(180deg);
}

.student-sidebar-submenu {
  display: grid;
  gap: 3px;
  margin: 3px 38px 8px 0;
  padding-right: 13px;
  border-right: 1px solid #dce3ec;
}

.student-sidebar-submenu a {
  padding: 7px 9px;
  border-radius: 8px;
  color: #68768a;
  font-size: 0.78rem;
}

.student-sidebar-submenu a:hover {
  background: #f4f6f9;
  color: #133c69;
}

/* -------------------------------------------------------------------------- *
 * 4. Account footer
 * -------------------------------------------------------------------------- */

.student-sidebar-footer {
  display: flex;
  min-height: 76px;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-top: 1px solid #e9edf2;
  background: rgba(248, 250, 252, 0.9);
}

.student-sidebar-avatar {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: #e7edf5;
  color: #143b68;
  font-weight: 850;
}

.student-sidebar-user {
  flex: 1;
}

.student-sidebar-footer form {
  margin: 0;
}

.student-sidebar-footer button {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #7a8798;
  cursor: pointer;
}

.student-sidebar-footer button:hover {
  background: #fff0ef;
  color: #b42318;
}

/* -------------------------------------------------------------------------- *
 * 5. Desktop icon-collapse state
 * -------------------------------------------------------------------------- */

body.sidebar-is-collapsed {
  --student-sidebar-width: 88px;
}

body.sidebar-is-collapsed .student-sidebar {
  width: 88px;
}

body.sidebar-is-collapsed .student-sidebar-brand-copy,
body.sidebar-is-collapsed .student-sidebar-user,
body.sidebar-is-collapsed .student-sidebar-section h2,
body.sidebar-is-collapsed .student-sidebar-link span,
body.sidebar-is-collapsed .student-sidebar-link b,
body.sidebar-is-collapsed .student-sidebar-submenu {
  display: none;
}

body.sidebar-is-collapsed .student-sidebar-header,
body.sidebar-is-collapsed .student-sidebar-footer {
  justify-content: center;
  padding-inline: 10px;
}

body.sidebar-is-collapsed .student-sidebar-link {
  justify-content: center;
  padding-inline: 10px;
}

body.sidebar-is-collapsed .student-sidebar-link:hover {
  transform: none;
}

body.sidebar-is-collapsed .student-sidebar-footer form {
  display: none;
}

/* -------------------------------------------------------------------------- *
 * 6. Mobile off-canvas behavior
 * -------------------------------------------------------------------------- */

.student-sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(4, 18, 38, 0.48);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

@media (max-width: 960px) {
  body.has-student-sidebar,
  body.sidebar-is-collapsed {
    --student-sidebar-width: min(88vw, 320px);
    padding-right: 0;
  }

  .topbar-authenticated {
    height: 64px;
    padding: 0 14px;
    background: #ffffff;
  }

  .student-sidebar {
    width: var(--student-sidebar-width);
    transform: translateX(105%);
  }

  body.sidebar-is-open {
    overflow: hidden;
  }

  body.sidebar-is-open .student-sidebar {
    transform: translateX(0);
  }

  body.sidebar-is-collapsed .student-sidebar {
    width: var(--student-sidebar-width);
  }

  body.sidebar-is-collapsed .student-sidebar-brand-copy,
  body.sidebar-is-collapsed .student-sidebar-user,
  body.sidebar-is-collapsed .student-sidebar-section h2,
  body.sidebar-is-collapsed .student-sidebar-link span,
  body.sidebar-is-collapsed .student-sidebar-link b {
    display: grid;
  }

  body.sidebar-is-collapsed .student-sidebar-section h2,
  body.sidebar-is-collapsed .student-sidebar-link span,
  body.sidebar-is-collapsed .student-sidebar-link b {
    display: initial;
  }

  body.sidebar-is-collapsed .student-sidebar-submenu {
    display: grid;
  }

  body.sidebar-is-collapsed .student-sidebar-header,
  body.sidebar-is-collapsed .student-sidebar-footer {
    justify-content: space-between;
    padding-inline: 16px;
  }

  body.sidebar-is-collapsed .student-sidebar-link {
    justify-content: flex-start;
    padding-inline: 13px;
  }

  body.sidebar-is-collapsed .student-sidebar-footer form {
    display: block;
  }

  .student-sidebar-close {
    display: grid;
    place-items: center;
  }
}

@media print {
  .student-sidebar,
  .student-sidebar-backdrop,
  .student-sidebar-trigger {
    display: none !important;
  }

  body.has-student-sidebar {
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.has-student-sidebar,
  .student-sidebar,
  .student-sidebar-link {
    transition: none;
  }
}

/* ============================= End of student_shell.css ============================= */