:root {
  --page-bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --surface-dark: #0f172a;
  --surface-dark-soft: #111827;
  --line: #d7deea;
  --line-dark: #243244;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-dark: #f8fafc;
  --text-dark-muted: #cbd5e1;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --accent: #0f766e;
  --accent-strong: #0b6159;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 10px 24px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 14px 36px rgba(15, 23, 42, 0.12);
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.05), transparent 26%),
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.05), transparent 24%),
    var(--page-bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

main.container {
  width: min(100%, 1320px);
}

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

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

.navbar.navbar-dark.bg-dark {
  background-color: var(--surface-dark) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.navbar .nav-link,
.navbar .btn-link.nav-link {
  color: rgba(255, 255, 255, 0.84) !important;
  font-size: 0.86rem;
  font-weight: 500;
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
}

.navbar .nav-link:hover,
.navbar .nav-link.active,
.navbar .btn-link.nav-link:hover {
  color: #ffffff !important;
}

.navbar .form-control {
  font-size: 0.88rem;
}

.form-control,
.form-select,
textarea,
input[type="text"],
input[type="date"],
input[type="email"],
input[type="password"],
input[type="number"] {
  border-radius: 0.85rem;
  border: 1px solid var(--line);
  background-color: #ffffff;
  color: var(--text);
  box-shadow: none;
}

.form-control:focus,
.form-select:focus,
textarea:focus,
input[type="text"]:focus,
input[type="date"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus {
  border-color: rgba(37, 99, 235, 0.42);
  box-shadow: 0 0 0 0.18rem rgba(37, 99, 235, 0.12);
}

.btn {
  border-radius: 999px;
  font-weight: 600;
  padding: 0.55rem 1rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-strong);
  border-color: var(--primary-strong);
}

.btn-outline-primary {
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.34);
}

.btn-outline-primary:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.btn-outline-info,
.btn-info {
  color: var(--accent);
  border-color: rgba(15, 118, 110, 0.34);
  background-color: transparent;
}

.btn-outline-info:hover,
.btn-info:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.btn-outline-warning:hover,
.btn-outline-success:hover,
.btn-outline-danger:hover {
  color: #ffffff;
}

.card {
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}

.card-header {
  background-color: rgba(248, 250, 252, 0.96);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  font-weight: 600;
}

.card-title {
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.badge {
  border-radius: 999px;
  font-weight: 600;
  padding: 0.4rem 0.6rem;
}

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

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

.shadow-sm {
  box-shadow: var(--shadow-sm) !important;
}

.shadow {
  box-shadow: var(--shadow-md) !important;
}

.alert {
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
}

.alert-light {
  background-color: #ffffff;
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.18);
}

.alert-dark,
.bg-dark,
.card.bg-dark,
.modal-content.bg-dark,
.accordion-item.bg-dark,
.accordion-body.bg-dark,
.table-dark,
.list-group-item-dark {
  background-color: var(--surface-dark-soft) !important;
  color: var(--text-dark) !important;
  border-color: var(--line-dark) !important;
}

.alert-dark {
  border-color: var(--line-dark);
}

.bg-dark h1,
.bg-dark h2,
.bg-dark h3,
.bg-dark h4,
.bg-dark h5,
.bg-dark h6,
.card.bg-dark h1,
.card.bg-dark h2,
.card.bg-dark h3,
.card.bg-dark h4,
.card.bg-dark h5,
.card.bg-dark h6,
.modal-content.bg-dark h1,
.modal-content.bg-dark h2,
.modal-content.bg-dark h3,
.modal-content.bg-dark h4,
.modal-content.bg-dark h5,
.modal-content.bg-dark h6,
.accordion-item.bg-dark h1,
.accordion-item.bg-dark h2,
.accordion-item.bg-dark h3,
.accordion-item.bg-dark h4,
.accordion-item.bg-dark h5,
.accordion-item.bg-dark h6,
.table-dark h1,
.table-dark h2,
.table-dark h3,
.table-dark h4,
.table-dark h5,
.table-dark h6,
.list-group-item-dark h1,
.list-group-item-dark h2,
.list-group-item-dark h3,
.list-group-item-dark h4,
.list-group-item-dark h5,
.list-group-item-dark h6 {
  color: #ffffff;
}

.bg-dark .text-dark,
.card.bg-dark .text-dark,
.modal-content.bg-dark .text-dark,
.accordion-item.bg-dark .text-dark,
.accordion-body.bg-dark .text-dark,
.table-dark .text-dark,
.list-group-item-dark .text-dark,
.bg-dark .text-light,
.card.bg-dark .text-light,
.modal-content.bg-dark .text-light,
.accordion-item.bg-dark .text-light,
.accordion-body.bg-dark .text-light,
.table-dark .text-light,
.list-group-item-dark .text-light {
  color: var(--text-dark) !important;
}

.bg-dark .text-muted,
.card.bg-dark .text-muted,
.modal-content.bg-dark .text-muted,
.accordion-item.bg-dark .text-muted,
.accordion-body.bg-dark .text-muted,
.table-dark .text-muted,
.list-group-item-dark .text-muted,
.bg-dark .text-white-50,
.card.bg-dark .text-white-50,
.modal-content.bg-dark .text-white-50,
.accordion-item.bg-dark .text-white-50,
.accordion-body.bg-dark .text-white-50,
.table-dark .text-white-50,
.list-group-item-dark .text-white-50 {
  color: var(--text-dark-muted) !important;
}

.bg-light,
.bg-white,
.alert-light,
.card:not(.bg-dark),
.modal-content:not(.bg-dark),
.accordion-item:not(.bg-dark),
.accordion-body:not(.bg-dark),
.table:not(.table-dark),
.list-group-item:not(.list-group-item-dark),
.home-quick-link,
.home-hero {
  color: var(--text) !important;
}

.bg-light h1,
.bg-light h2,
.bg-light h3,
.bg-light h4,
.bg-light h5,
.bg-light h6,
.bg-white h1,
.bg-white h2,
.bg-white h3,
.bg-white h4,
.bg-white h5,
.bg-white h6,
.alert-light h1,
.alert-light h2,
.alert-light h3,
.alert-light h4,
.alert-light h5,
.alert-light h6,
.card:not(.bg-dark) h1,
.card:not(.bg-dark) h2,
.card:not(.bg-dark) h3,
.card:not(.bg-dark) h4,
.card:not(.bg-dark) h5,
.card:not(.bg-dark) h6,
.table:not(.table-dark) h1,
.table:not(.table-dark) h2,
.table:not(.table-dark) h3,
.table:not(.table-dark) h4,
.table:not(.table-dark) h5,
.table:not(.table-dark) h6,
.list-group-item:not(.list-group-item-dark) h1,
.list-group-item:not(.list-group-item-dark) h2,
.list-group-item:not(.list-group-item-dark) h3,
.list-group-item:not(.list-group-item-dark) h4,
.list-group-item:not(.list-group-item-dark) h5,
.list-group-item:not(.list-group-item-dark) h6 {
  color: var(--text);
}

.bg-light .text-light,
.bg-white .text-light,
.alert-light .text-light,
.card:not(.bg-dark) .text-light,
.modal-content:not(.bg-dark) .text-light,
.accordion-item:not(.bg-dark) .text-light,
.accordion-body:not(.bg-dark) .text-light,
.table:not(.table-dark) .text-light,
.list-group-item:not(.list-group-item-dark) .text-light {
  color: var(--text) !important;
}

.bg-light .text-muted,
.bg-white .text-muted,
.alert-light .text-muted,
.card:not(.bg-dark) .text-muted,
.modal-content:not(.bg-dark) .text-muted,
.accordion-item:not(.bg-dark) .text-muted,
.accordion-body:not(.bg-dark) .text-muted,
.table:not(.table-dark) .text-muted,
.list-group-item:not(.list-group-item-dark) .text-muted {
  color: var(--text-muted) !important;
}

.table {
  color: var(--text);
}

.table thead th {
  background-color: #f8fafc;
  color: var(--text);
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
  font-weight: 700;
}

.table tbody td {
  vertical-align: middle;
}

.table-dark {
  --bs-table-bg: var(--surface-dark-soft);
  --bs-table-striped-bg: #131c2c;
  --bs-table-striped-color: var(--text-dark);
  --bs-table-hover-bg: #162133;
  --bs-table-hover-color: var(--text-dark);
  color: var(--text-dark);
  border-color: var(--line-dark);
}

.table-dark thead th {
  background-color: #0b1220;
  color: #ffffff;
  border-color: var(--line-dark);
}

.table-responsive {
  border-radius: var(--radius-lg);
}

.accordion-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.18);
}

.accordion-button {
  background-color: #ffffff;
  color: var(--text);
  font-weight: 600;
}

.accordion-button:not(.collapsed) {
  background-color: #f8fafc;
  color: var(--text);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: none;
}

.accordion-body {
  background-color: #ffffff;
  color: var(--text);
}

.list-group-item {
  border-color: rgba(148, 163, 184, 0.18);
}

.modal-content {
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 1rem;
  box-shadow: var(--shadow-md);
  background-color: #ffffff;
  color: var(--text);
}

.breadcrumb {
  background-color: transparent;
}

.calendar-day {
  min-height: 110px;
  position: relative;
  border-radius: 0.9rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.calendar-day:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.calendar-day.bg-dark {
  background-color: var(--surface-dark-soft) !important;
  border-color: var(--line-dark) !important;
}

.calendar-day.bg-light {
  background-color: #eef4ff !important;
  border-color: rgba(37, 99, 235, 0.30) !important;
}

.status-indicators {
  min-height: 22px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
}

.status-indicators i {
  font-size: 15px;
}

.action-buttons {
  display: flex;
  justify-content: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.action-buttons .btn {
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.action-buttons .btn i {
  font-size: 12px;
}

.dashboard-page,
.question-page,
.message-page,
.account-page,
.home-page {
  position: relative;
}

.dashboard-page .card,
.question-page .card,
.message-page .card,
.account-page .card,
.home-page .card {
  overflow: hidden;
}

.question-page .question-sidebar,
.message-page .message-sidebar {
  top: 1rem;
}

.question-page .thread-meta,
.question-page .reply-card {
  word-break: break-word;
}

.question-page .thread-body,
.question-page .thread-replies,
.question-page .thread-reply-form {
  max-width: 100%;
}

.question-page .form-control,
.question-page .form-select,
.question-page textarea,
.question-page input[type="text"],
.question-page input[type="date"],
.message-page .form-control,
.message-page .form-select,
.message-page textarea,
.message-page input[type="text"],
.message-page input[type="date"] {
  width: 100%;
}

.account-page .accordion-item.bg-dark,
.account-page .accordion-body,
.account-page .card.bg-dark,
.account-page .table-dark {
  color: var(--text-dark);
}

.account-page th,
.account-page td {
  color: inherit;
}

.profile-img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
}

.favourite-icon i {
  transition: transform 0.2s ease, color 0.2s ease;
  cursor: pointer;
}

.favourite-icon i:hover {
  transform: scale(1.1);
  color: #dc2626 !important;
}

.z-3 {
  z-index: 3 !important;
}

.hover-glow:hover {
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.08), 0 12px 24px rgba(15, 23, 42, 0.12);
  transform: translateY(-3px);
}

.category-badge,
.btn-accent {
  background-color: var(--accent);
  color: #ffffff;
  border: none;
}

.category-badge:hover,
.btn-accent:hover {
  background-color: var(--accent-strong);
  color: #ffffff;
}

.home-page {
  display: grid;
  gap: 1.5rem;
}

.home-hero {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(30, 41, 59, 0.92));
  color: var(--text-dark);
}

.home-hero-copy {
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 26%),
    radial-gradient(circle at bottom right, rgba(15, 118, 110, 0.16), transparent 24%);
}

.home-hero-title {
  font-size: clamp(1.85rem, 2.6vw, 2.75rem);
  line-height: 1.12;
}

.home-hero-title-sm {
  font-size: clamp(1.5rem, 2.1vw, 2.1rem);
  line-height: 1.15;
}

.home-hero-copy-text {
  font-size: 0.98rem;
  line-height: 1.7;
}

.home-hero .lead,
.home-hero .text-muted,
.home-banner-caption p,
.home-banner-caption .text-white-50 {
  color: rgba(248, 250, 252, 0.78) !important;
}

.home-banner-slide {
  min-height: 420px;
  height: 100%;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: end;
}

.home-banner-caption {
  width: 100%;
  padding: 1.25rem;
}

.home-quick-link {
  display: block;
  color: var(--text);
  background: var(--surface);
  border-radius: 1rem;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.home-quick-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.22);
  color: var(--text);
}

.home-category-card {
  min-height: 280px;
  background-size: cover;
  background-position: center;
  color: #ffffff;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.home-category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  filter: saturate(1.04);
}

.home-category-card .card-body {
  min-height: 280px;
}

.home-category-card h3 {
  color: #ffffff !important;
}

.home-category-card .badge {
  color: #ffffff;
}

.home-category-card .text-white-50 {
  color: rgba(248, 250, 252, 0.72) !important;
}

.home-category-card .btn-outline-light {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.72);
}

.home-category-card .btn-outline-light:hover {
  background-color: #ffffff;
  color: var(--text);
}

@media (max-width: 991.98px) {
  .question-page .question-sidebar,
  .feedback-page .feedback-sidebar {
    position: static !important;
  }
}

@media (max-width: 767.98px) {
  .card {
    border-radius: 0.9rem;
  }

  .calendar-day {
    min-height: 95px;
  }

  .home-banner-slide,
  .home-category-card,
  .home-category-card .card-body {
    min-height: 320px;
  }
}