/**
 * Frontend — Material-style layout, navbar, offcanvas sidebar, cards
 */

:root {
  --nav-height: 64px;
  --sidebar-width: 280px;
  --card-radius: 16px;
  --card-shadow: 0 2px 8px rgba(0,0,0,.06);
  --card-shadow-hover: 0 12px 24px rgba(0,0,0,.1);
  --accent: #6750a4;
  --accent-rgb: 103, 80, 164;
}

[data-bs-theme="dark"] {
  --card-shadow: 0 2px 8px rgba(0,0,0,.2);
  --card-shadow-hover: 0 12px 24px rgba(0,0,0,.3);
}

.navbar-material {
  min-height: var(--nav-height);
  box-shadow: 0 2px 4px rgba(0,0,0,.08);
  padding-top: 0;
  padding-bottom: 0;
}
[data-bs-theme="dark"] .navbar-material {
  box-shadow: 0 2px 4px rgba(0,0,0,.2);
}
.navbar-material .navbar-brand {
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.navbar-material .nav-link {
  font-weight: 500;
  padding: 0.5rem 0.75rem !important;
  border-radius: 8px;
  transition: background-color .15s;
}
.navbar-material .nav-link:hover {
  background-color: rgba(var(--accent-rgb), 0.08);
}
.navbar-material .navbar-toggler {
  border: none;
  padding: 0.5rem;
  border-radius: 50%;
}
.navbar-material .navbar-toggler:hover {
  background-color: rgba(255,255,255,.1);
}
.navbar-material .navbar-toggler:focus {
  box-shadow: 0 0 0 2px rgba(255,255,255,.3);
}

@media (min-width: 992px) {
  .navbar-material .navbar-toggler {
    display: none;
  }
}

@media (max-width: 991.98px) {
  .navbar-material .navbar-collapse {
    display: none !important;
  }
}

.offcanvas-sidebar {
  width: var(--sidebar-width) !important;
  max-width: 85vw;
  border-right: 0;
  box-shadow: 4px 0 24px rgba(0,0,0,.12);
}
.offcanvas-sidebar .offcanvas-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--bs-border-color);
}
.offcanvas-sidebar .offcanvas-title {
  font-weight: 600;
  font-size: 1.1rem;
}
.offcanvas-sidebar .nav {
  flex-direction: column;
}
.offcanvas-sidebar .nav-link {
  padding: 0.75rem 1.25rem !important;
  border-radius: 0;
  border-left: 3px solid transparent;
}
.offcanvas-sidebar .nav-link:hover,
.offcanvas-sidebar .nav-link.active {
  background-color: rgba(var(--accent-rgb), 0.08);
  border-left-color: var(--accent);
}
.offcanvas-sidebar .sidebar-search {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--bs-border-color);
}
.offcanvas-sidebar .sidebar-divider {
  height: 1px;
  background: var(--bs-border-color);
  margin: 0.5rem 1rem;
}
.offcanvas-sidebar .theme-toggle {
  width: 100%;
  text-align: left;
  padding: 0.75rem 1.25rem !important;
  border-radius: 0;
  border: none;
  background: none;
}

.prompt-card-modern {
  border: none;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: box-shadow .25s ease, transform .2s ease;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.prompt-card-modern:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}
.prompt-card-modern .card-accent {
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #7f67b8);
  flex-shrink: 0;
}
.prompt-card-modern .card-body {
  padding: 1.25rem 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.prompt-card-modern .card-title {
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}
.prompt-card-modern .card-title a {
  color: inherit;
  text-decoration: none;
  transition: color .15s;
}
.prompt-card-modern .card-title a:hover {
  color: var(--accent);
}
.prompt-card-modern .card-meta {
  font-size: 0.8rem;
  color: var(--bs-secondary-color);
  margin-top: auto;
  padding-top: 0.75rem;
}
.prompt-card-modern .card-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}
.prompt-card-modern .btn-action {
  font-weight: 500;
  border-radius: 8px;
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
}
.prompt-card-modern .badge-category {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.search-bar-modern {
  background: var(--bs-body-bg);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  box-shadow: var(--card-shadow);
  margin-bottom: 1.5rem;
}
.search-bar-modern .form-control,
.search-bar-modern .form-select {
  border-radius: 8px;
  border-color: var(--bs-border-color);
}
.search-bar-modern .btn-search {
  border-radius: 8px;
  font-weight: 500;
  padding: 0.5rem 1.25rem;
}

.page-title-modern {
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.footer-modern {
  margin-top: auto;
  padding: 2rem 0;
  border-top: 1px solid var(--bs-border-color);
}
.footer-modern a {
  text-decoration: none;
  opacity: 0.85;
  transition: opacity .15s;
}
.footer-modern a:hover {
  opacity: 1;
}

[data-bs-theme="dark"] .prompt-card-modern .card-title a {
  color: var(--bs-body-color);
}
[data-bs-theme="dark"] .prompt-card-modern .card-title a:hover {
  color: var(--bs-primary);
}

/* Auth pages: login, register, forgot password */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: linear-gradient(160deg, #f5f3ff 0%, #ede9fe 50%, #e0e7ff 100%);
}
[data-bs-theme="dark"] .auth-page {
  background: linear-gradient(160deg, #1a1a2e 0%, #16213e 50%, #0f0f1a 100%);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  border: none;
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(103, 80, 164, 0.12), 0 2px 8px rgba(0,0,0,.06);
  overflow: hidden;
}
[data-bs-theme="dark"] .auth-card {
  box-shadow: 0 8px 32px rgba(0,0,0,.25);
}
.auth-card-accent {
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #7f67b8);
}
.auth-card .card-body {
  padding: 2rem 1.75rem;
}
.auth-card .auth-title {
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: var(--bs-body-color);
}
.auth-card .form-label {
  font-weight: 500;
  margin-bottom: 0.35rem;
}
.auth-card .form-control {
  border-radius: 10px;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--bs-border-color);
}
.auth-card .form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
}
.auth-card .btn-primary {
  border-radius: 10px;
  padding: 0.65rem 1rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent) 0%, #7f67b8 100%);
  border: none;
}
.auth-card .btn-primary:hover {
  background: linear-gradient(135deg, #5a4a8f 0%, #6b5a9e 100%);
  filter: brightness(1.05);
}
.auth-card .alert {
  border-radius: 10px;
}
.auth-links {
  font-size: 0.9rem;
  margin-top: 1.25rem;
}
.auth-links a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}
.auth-links a:hover {
  text-decoration: underline;
}
.auth-back {
  margin-top: 1.5rem;
  font-size: 0.9rem;
}
.auth-back a {
  color: var(--bs-secondary-color);
  text-decoration: none;
}
.auth-back a:hover {
  color: var(--accent);
}