/* assets/css/style.css — Smart Notes Platform */
/* ── Variables ─────────────────────────────────────────── */
:root {
  --sn-nav:#000046;
  --sn-primary: #4F46E5;
  --sn-secondary: #7C3AED;
  --sn-accent: #06B6D4;
  --sn-success: #10B981;
  --sn-warning: #F59E0B;
  --sn-danger: #EF4444;
  --sn-bg: #F8F9FC;
  --sn-card: #FFFFFF;
  --sn-border: #E2E8F0;
  --sn-text: #1E293B;
  --sn-muted: #64748B;
  --sn-sidebar-w: 260px;
  --sn-navbar-h: 64px;
  --sn-radius: 12px;
  --sn-shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 4px 16px rgba(0, 0, 0, .06);
  --sn-shadow-lg: 0 8px 32px rgba(0, 0, 0, .10);
  font-family: 'Plus Jakarta Sans', sans-serif;
}

[data-bs-theme="dark"] {
  --sn-bg: #0F1117;
  --sn-card: #1A1D27;
  --sn-border: #2D3148;
  --sn-text: #E2E8F0;
  --sn-muted: #94A3B8;
  --sn-shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .3);
}

/* ── Reset / Base ───────────────────────────────────────── */
* {
  box-sizing: border-box;
}

body {
  background: var(--sn-bg);
  color: var(--sn-text);
  min-height: 100vh;
}

a {
  color: var(--sn-primary);
}

a:hover {
  color: var(--sn-secondary);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Sora', sans-serif;
  font-weight: 700;
}

.text-muted {
  color: var(--sn-muted) !important;
}

/* ── Loading bar ────────────────────────────────────────── */
#loadingBar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--sn-primary), var(--sn-accent));
  z-index: 9999;
  transition: width .3s ease;
}

/* ── Navbar ─────────────────────────────────────────────── */
.sn-navbar {
  height: var(--sn-navbar-h);
  background: var(--sn-nav);
  border-bottom: 1px solid var(--sn-border);
  backdrop-filter: blur(10px);
  z-index: 1030;
}

.sn-navbar .navbar-brand {
  font-family: 'Sora', sans-serif;
  font-size: 1.5rem;
  color: #2784ff;
}

.sn-search-form {
  position: relative;
  max-width: 440px;
  width: 100%;
}

.sn-search-form .form-control {
  border-radius: 10px 0 0 10px;
  background: var(--sn-bg);
  border-color: var(--sn-border);
  font-size: .875rem;
}

.sn-search-form .btn-primary {
  border-radius: 0 10px 10px 0;
}

.sn-search-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--sn-card);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius);
  margin-top: 4px;
  box-shadow: var(--sn-shadow-lg);
  max-height: 320px;
  overflow-y: auto;
}

.sn-search-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: .875rem;
  cursor: pointer;
  border-bottom: 1px solid var(--sn-border);
  text-decoration: none;
  color: var(--sn-text);
}

.sn-search-item:hover {
  background: var(--sn-bg);
}

.sn-search-item img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  border-radius: 6px;
}

.navbar-toggler span {
  color: white;
}

.dropdown-menu li a{
    color:black;
}

.nav-link {
  color: white;

}

.nav-link:focus,
.nav-link:hover {
  color: white;
  background-color:var(--sn-nav);
  border-radius: 10px;
}

.sn-avatar-placeholder {
  background: linear-gradient(135deg, var(--sn-primary), var(--sn-secondary));
  color: #fff;
  font-size: .8rem;
  font-weight: 600;
}



.navbar-toggler:focus {
  box-shadow: none;
}

.collapseNav {
  display: none;
}
/* Notifications dropdown */
.sn-notif-dropdown {
  box-shadow: var(--sn-shadow-lg) !important;
  border-color: var(--sn-border) !important;
}

.sn-notif-list {
  max-height: 300px;
  overflow-y: auto;
}

.sn-notif-item {
  padding: 10px 14px;
  border-bottom: 1px solid var(--sn-border);
  font-size: .8rem;
  cursor: pointer;
  display: block;
  text-decoration: none;
  color: var(--sn-text);
}

.sn-notif-item:hover {
  background: var(--sn-bg);
}

.sn-notif-item.unread {
  background: rgba(79, 70, 229, .05);
  border-left: 3px solid var(--sn-primary);
}

/* ── Sidebar ────────────────────────────────────────────── */
.sn-layout {
  display: block;
  min-height: calc(100vh - var(--sn-navbar-h));
}

/* ── Desktop: fixed sidebar + margin-left on main ── */
.sn-sidebar {
  width: var(--sn-sidebar-w);
  background: var(--sn-card);
  border-right: 1px solid var(--sn-border);
  position: fixed;
  top: var(--sn-navbar-h);
  left: 0;
  height: calc(100vh - var(--sn-navbar-h));
  z-index: 1030;
  flex-shrink: 0;
  transition: transform .28s cubic-bezier(.4, 0, .2, 1), width .28s cubic-bezier(.4, 0, .2, 1);
}

/* Sidebar hidden state on desktop (collapsed) */
.sn-sidebar.is-collapsed {
  transform: translateX(-100%);
}

.sn-sidebar-brand {
  font-family: 'Sora', sans-serif;
  font-size: .95rem;
}

.sn-sidebar-label {
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--sn-muted);
  font-weight: 600;
  margin-top: 1rem;
}

.sn-sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  font-size: .875rem;
  color: var(--sn-muted);
  text-decoration: none;
  border-radius: 0;
  transition: all .15s;
  border-left: 3px solid transparent;
}

.sn-sidebar-link i {
  font-size: 1rem;
  width: 18px;
}

.sn-sidebar-link:hover {
  color: var(--sn-primary);
  background: rgba(79, 70, 229, .06);
}

.sn-sidebar-link.active {
  color: var(--sn-primary);
  background: rgba(79, 70, 229, .08);
  border-left-color: var(--sn-primary);
  font-weight: 600;
}

.sn-main {
  min-width: 0;
  padding: 2rem;
  margin-left: var(--sn-sidebar-w);
  transition: margin-left .28s cubic-bezier(.4, 0, .2, 1);
  margin-left:270px;
}

/* When sidebar is collapsed on desktop */
.sn-layout.sidebar-collapsed .sn-main {
  margin-left: 0;
}

/* ── Cards ──────────────────────────────────────────────── */
.sn-card {
  background: var(--sn-card);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius);
  box-shadow: var(--sn-shadow);
  transition: box-shadow .2s, transform .2s;
  overflow: hidden;
}

.sn-card:hover {
  box-shadow: var(--sn-shadow-lg);
  transform: translateY(-2px);
}

.sn-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.sn-card-img-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--sn-primary) 0%, var(--sn-secondary) 50%, var(--sn-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2.5rem;
}

.sn-card-body {
  padding: 1.25rem;
}

.sn-card-title {
  font-family: 'Sora', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: .5rem;
}

.sn-card-title a {
  color: var(--sn-text);
  text-decoration: none;
}

.sn-card-title a:hover {
  color: var(--sn-primary);
}

.sn-card-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: .75rem;
  color: var(--sn-muted);
}

.sn-card-meta i {
  margin-right: 3px;
}

.sn-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: .75rem;
}

/* ── Stat cards (dashboard) ─────────────────────────────── */
.sn-stat-card {
  background: var(--sn-card);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: var(--sn-shadow);
}

.sn-stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.sn-stat-num {
  font-family: 'Sora', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
}

.sn-stat-label {
  font-size: .8rem;
  color: var(--sn-muted);
  margin-top: 2px;
}

/* ── Hero ───────────────────────────────────────────────── */
.sn-hero {
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #06B6D4 100%);
  color: #fff;
  padding: 6rem 0 5rem;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
}

.sn-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
}

.sn-hero .lead {
  font-size: 1.15rem;
  opacity: .9;
}

.sn-hero .sn-search-form .form-control {
  border: none;
  box-shadow: 0 4px 24px rgba(0, 0, 0, .15);
}

/* ── Section headings ────────────────────────────────────── */
.sn-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.sn-section-title span {
  color: var(--sn-primary);
}

/* ── Badges / Tags ───────────────────────────────────────── */
.sn-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .03em;
}

.sn-badge-primary {
  background: rgba(79, 70, 229, .12);
  color: var(--sn-primary);
}

.sn-badge-success {
  background: rgba(16, 185, 129, .12);
  color: var(--sn-success);
}

.sn-badge-warning {
  background: rgba(245, 158, 11, .15);
  color: var(--sn-warning);
}

.sn-badge-danger {
  background: rgba(239, 68, 68, .12);
  color: var(--sn-danger);
}

.sn-badge-info {
  background: rgba(6, 182, 212, .12);
  color: var(--sn-accent);
}

/* ── Table ───────────────────────────────────────────────── */
.sn-table {
  width: 100%;
  border-collapse: collapse;
}

.sn-table th {
  background: var(--sn-bg);
  padding: 10px 16px;
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--sn-muted);
  border-bottom: 1px solid var(--sn-border);
  white-space: nowrap;
}

.sn-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--sn-border);
  font-size: .875rem;
  vertical-align: middle;
}

.sn-table tr:last-child td {
  border-bottom: none;
}

.sn-table tr:hover td {
  background: rgba(79, 70, 229, .03);
}

/* ── Form controls ───────────────────────────────────────── */
.form-control,
.form-select {
  background: var(--sn-bg);
  border-color: var(--sn-border);
  color: var(--sn-text);
  border-radius: 8px;
  padding: .375rem .25rem .375rem .75rem;
}

.form-control:focus,
.form-select:focus {
  background: var(--sn-card);
  border-color: var(--sn-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
  color: var(--sn-text);
}

label.form-label {
  font-weight: 500;
  font-size: .875rem;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn-primary {
  background: var(--sn-primary);
  border-color: var(--sn-primary);
}

.btn-primary:hover {
  background: #4338CA;
  border-color: #4338CA;
}

.btn {
  border-radius: 8px;
  font-weight: 500;
}

/* ── Note detail ─────────────────────────────────────────── */
.sn-pdf-preview {
  width: 100%;
  height: 500px;
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius);
}

.sn-rich-content {
  font-size: .975rem;
  line-height: 1.8;
}

.sn-rich-content h1,
.sn-rich-content h2,
.sn-rich-content h3 {
  margin-top: 1.5rem;
}

.sn-rich-content img {
  max-width: 100%;
  border-radius: 8px;
}

.sn-rich-content pre {
  background: var(--sn-bg);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
}

/* ── Star rating ─────────────────────────────────────────── */
.sn-stars {
  display: flex;
  gap: 4px;
}

.sn-stars .star {
  font-size: 1.4rem;
  cursor: pointer;
  color: #D1D5DB;
  transition: color .15s;
}

.sn-stars .star.active,
.sn-stars .star:hover,
.sn-stars .star.hovered {
  color: #F59E0B;
}

/* ── Teacher profile card ────────────────────────────────── */
.sn-teacher-card {
  background: var(--sn-card);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--sn-shadow);
}

.sn-teacher-avatar {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--sn-primary);
}

.sn-teacher-avatar-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sn-primary), var(--sn-secondary));
  color: #fff;
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  border: 3px solid var(--sn-primary);
}

/* ── Comment ─────────────────────────────────────────────── */
.sn-comment {
  border-left: 3px solid var(--sn-border);
  padding-left: 1rem;
  margin-bottom: 1.25rem;
}

.sn-comment.own {
  border-left-color: var(--sn-primary);
}

.sn-reply {
  margin-left: 2rem;
  border-left: 2px solid var(--sn-border);
  padding-left: .75rem;
}

/* ── Progress / Skill bars ───────────────────────────────── */
.sn-progress {
  height: 6px;
  border-radius: 3px;
  background: var(--sn-border);
  overflow: hidden;
}

.sn-progress-bar {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--sn-primary), var(--sn-accent));
  transition: width .6s ease;
}

/* ── Announcement banner ─────────────────────────────────── */
.sn-announcement {
  border-left: 4px solid var(--sn-primary);
  background: rgba(79, 70, 229, .06);
  padding: .75rem 1rem;
  border-radius: 0 8px 8px 0;
  margin-bottom: .75rem;
}

/* ── Footer ──────────────────────────────────────────────── */
.sn-footer {
  background: var(--sn-card);
  margin-left:258px;
  border-top: 1px solid var(--sn-border);
}

@media (max-width: 575.98px) {
    .sn-footer{
        margin-left:0px;

    }
}

/* ── Back to top ─────────────────────────────────────────── */
.sn-back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  box-shadow: var(--sn-shadow-lg);
}

.sn-back-top.show {
  display: flex;
}

/* ── Dashboard header ────────────────────────────────────── */
.sn-dash-header {
  background: linear-gradient(135deg, var(--sn-primary), var(--sn-secondary));
  color: #fff;
  padding: 2rem;
  border-radius: var(--sn-radius);
  margin-bottom: 1.5rem;
}
.sn-dash-header p{
    color:white;
}

/* ── Alert / Flash ───────────────────────────────────────── */
.alert {
  border-radius: 10px;
  font-size: .875rem;
}

/* ── Breadcrumb ──────────────────────────────────────────── */
.breadcrumb {
  font-size: .8rem;
}

.breadcrumb-item+.breadcrumb-item::before {
  color: var(--sn-muted);
}

/* ── Pagination ──────────────────────────────────────────── */
.page-link {
  border-color: var(--sn-border);
  color: var(--sn-primary);
  border-radius: 8px !important;
}

.page-item.active .page-link {
  background: var(--sn-primary);
  border-color: var(--sn-primary);
}

.pagination {
  gap: 4px;
}

/* ── Upload area ─────────────────────────────────────────── */
.sn-upload-area {
  border: 2px dashed var(--sn-border);
  border-radius: var(--sn-radius);
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}

.sn-upload-area:hover,
.sn-upload-area.drag {
  border-color: var(--sn-primary);
  background: rgba(79, 70, 229, .04);
}

.sn-upload-area .upload-icon {
  font-size: 2.5rem;
  color: var(--sn-primary);
}

/* ── Spinner overlay ─────────────────────────────────────── */
.sn-spinner-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  display: none;
}

.sn-spinner-overlay.show {
  display: flex;
}

/* ── Top teachers section ────────────────────────────────── */
.sn-top-teacher {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: .875rem;
  border-radius: 10px;
  background: var(--sn-bg);
  margin-bottom: .5rem;
  text-decoration: none;
  color: var(--sn-text);
  transition: background .15s;
}

.sn-top-teacher:hover {
  background: var(--sn-border);
}

.sn-top-teacher img,
.sn-top-teacher .ph {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  background: linear-gradient(135deg, var(--sn-primary), var(--sn-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  flex-shrink: 0;
}

/* ── Chart containers ────────────────────────────────────── */
.sn-chart-container {
  position: relative;
  height: 280px;
}

/* ── CKEditor wrapper ────────────────────────────────────── */
.ck-editor__editable {
  min-height: 300px !important;
}

.ck.ck-editor {
  border-radius: 8px !important;
  border: 1px solid var(--sn-border) !important;
}

/* ── Sidebar toggle button ───────────────────────────────── */
.sn-sidebar-toggle {
  position: fixed;
  top: calc(var(--sn-navbar-h) + 0px);
  left: calc(var(--sn-sidebar-w) + 10px);
  z-index: 1040;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--sn-border);
  background: #ffffffb8;
  color: var(--sn-text);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--sn-shadow);
  transition: background .18s, color .18s, left .28s cubic-bezier(.4, 0, .2, 1);
}

/* When sidebar is collapsed, move toggle to left edge */
.sn-layout.sidebar-collapsed .sn-sidebar-toggle {
  left: -3px;
}

.sn-sidebar-toggle:hover {
  background: var(--sn-primary);
  color: #fff;
  border-color: var(--sn-primary);
}

/* Sidebar close button (inside sidebar, mobile) */
.sn-sidebar-close {
  background: none;
  border: none;
  color: var(--sn-muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: color .18s, background .18s;
}

.sn-sidebar-close:hover {
  color: var(--sn-danger);
  background: rgba(239, 68, 68, .08);
}

/* Backdrop */
.sn-sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1044;
  background: rgba(0, 0, 0, .45);
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}

.sn-sidebar-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 991.98px) {

  /* On mobile, reset margin-left since sidebar overlays */
  .sn-main,
  .sn-layout.sidebar-collapsed .sn-main {
    margin-left: 0;
  }

  /* Toggle button: always at left edge on mobile */
  .sn-sidebar-toggle,
  .sn-layout.sidebar-collapsed .sn-sidebar-toggle {
    left: -3px;
    display: flex;
  }

  /* Sidebar: hidden off-screen left, slides in on .is-open */
  .sn-sidebar {
    top: 0;
    height: 100vh;
    width: 270px;
    z-index: 1045;
    transform: translateX(-100%);
    transition: transform .28s cubic-bezier(.4, 0, .2, 1);
    box-shadow: none;
  }

  /* is-collapsed has no extra effect on mobile — .is-open controls it */
  .sn-sidebar.is-collapsed {
    transform: translateX(-100%);
  }

  .sn-sidebar.is-open {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0, 0, 0, .18);
  }

  /* Main content: full width, padding-top accounts for fixed toggle button */
  .sn-main {
    padding: 1rem;
    padding-top: 60px;
    width: 100%;
    margin-left:0px;
  }

  /* Admin pages use flex-grow-1 p-4 */
  .flex-grow-1.p-4 {
    padding-top: 60px !important;
  }

  .sn-hero {
    clip-path: none;
    padding: 4rem 0 3rem;
  }

  /* Tables scroll horizontally on mobile */
  .sn-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Stat cards: 2 per row on tablet */
  .sn-stat-card {
    padding: 1rem;
    gap: .75rem;
  }

  /* Dash header padding */
  .sn-dash-header {
    padding: 1.25rem;
  }

  /* Full-width buttons on mobile */
  .sn-mobile-full .btn {
    width: 100%;
    margin-bottom: .5rem;
  }
}

@media (max-width: 575.98px) {
  .sn-stat-num {
    font-size: 1.4rem;
  }

  .sn-hero h1 {
    font-size: 1.75rem;
  }

  /* Main padding tighter on small phones */
  .sn-main {
    padding: .75rem;
    margin-left:0px;
  }

  /* Card body padding smaller */
  .sn-card-body {
    padding: .9rem;
  }

  /* Table font smaller */
  .sn-table th,
  .sn-table td {
    padding: 8px 10px;
    font-size: .8rem;
  }

  /* Upload area compact */
  .sn-upload-area {
    padding: 1.5rem 1rem;
  }

  /* Stack form actions vertically */
  .sn-form-actions {
    flex-direction: column;
    gap: .5rem;
  }

  .sn-form-actions .btn {
    width: 100%;
  }
}

/* ── Admin layout: d-flex wrapper responsive ─────────────── */
/* Admin pages use d-flex > [sidebar + flex-grow-1 p-4] pattern */
@media (max-width: 991.98px) {

  /* Admin wrapper: stack vertically on mobile */
  .d-flex>.sn-sidebar~.flex-grow-1,
  .flex-grow-1.p-4:not([class*="align"]):not([class*="justify"]) {
    width: 100%;
    min-width: 0;
    padding: .75rem !important;
  }
}