/**
 * Landing Platform — Panel UI
 * Modern, responsive admin panel design system
 */

:root {
  --panel-sidebar-w: 272px;
  --panel-topbar-h: 60px;

  --panel-bg: #f4f6fb;
  --panel-surface: #ffffff;
  --panel-surface-2: #f8fafc;
  --panel-text: #0f172a;
  --panel-muted: #64748b;
  --panel-border: #e2e8f0;
  --panel-border-light: #f1f5f9;

  --panel-primary: #6366f1;
  --panel-primary-dark: #4f46e5;
  --panel-primary-soft: #eef2ff;
  --panel-primary-ring: rgba(99, 102, 241, 0.25);

  --panel-sidebar-bg: #0f172a;
  --panel-sidebar-bg-2: #1e293b;
  --panel-sidebar-text: #cbd5e1;
  --panel-sidebar-muted: #94a3b8;
  --panel-sidebar-active: rgba(99, 102, 241, 0.18);
  --panel-sidebar-hover: rgba(255, 255, 255, 0.06);

  --panel-success: #059669;
  --panel-success-bg: #ecfdf5;
  --panel-warning: #d97706;
  --panel-warning-bg: #fffbeb;
  --panel-danger: #dc2626;
  --panel-danger-bg: #fef2f2;
  --panel-info: #2563eb;
  --panel-info-bg: #eff6ff;

  --panel-radius: 14px;
  --panel-radius-sm: 10px;
  --panel-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
  --panel-shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
  --panel-font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;

  --panel-transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body.panel-body {
  margin: 0;
  font-family: var(--panel-font);
  font-size: 15px;
  line-height: 1.55;
  color: var(--panel-text);
  background: var(--panel-bg);
  min-height: 100vh;
}

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

/* ---- Layout ---- */

.panel-app {
  display: flex;
  min-height: 100vh;
}

.panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--panel-transition);
  backdrop-filter: blur(2px);
  -webkit-tap-highlight-color: transparent;
}

.panel-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.panel-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(var(--panel-sidebar-w), 88vw);
  max-width: var(--panel-sidebar-w);
  background: linear-gradient(180deg, var(--panel-sidebar-bg) 0%, #111827 100%);
  color: var(--panel-sidebar-text);
  z-index: 50;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform var(--panel-transition);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  visibility: hidden;
}

.panel-sidebar.is-open {
  transform: translateX(0);
  visibility: visible;
  box-shadow: var(--panel-shadow-md);
}

.panel-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.panel-sidebar-close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--panel-radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: #e2e8f0;
  cursor: pointer;
  flex-shrink: 0;
  font-size: 1.35rem;
  line-height: 1;
  padding: 0;
}

.panel-sidebar-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.panel-sidebar__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.25rem 1rem;
  overflow-y: auto;
}

.panel-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  padding: 0.35rem 0.5rem;
  margin-bottom: 0;
  min-width: 0;
  flex: 1;
}

.panel-brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--panel-primary) 0%, #8b5cf6 100%);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 800;
  flex-shrink: 0;
}

.panel-nav {
  flex: 1;
}

.panel-nav__section {
  margin-bottom: 1.25rem;
}

.panel-nav__label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--panel-sidebar-muted);
  padding: 0 0.75rem;
  margin-bottom: 0.45rem;
}

.panel-nav__link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--panel-sidebar-text);
  text-decoration: none;
  padding: 0.62rem 0.75rem;
  border-radius: var(--panel-radius-sm);
  margin-bottom: 0.15rem;
  font-size: 0.92rem;
  font-weight: 500;
  transition: background var(--panel-transition), color var(--panel-transition);
}

.panel-nav__link:hover {
  background: var(--panel-sidebar-hover);
  color: #fff;
}

.panel-nav__link.active {
  background: var(--panel-sidebar-active);
  color: #fff;
  box-shadow: inset 3px 0 0 var(--panel-primary);
}

.panel-nav__icon {
  width: 18px;
  height: 18px;
  opacity: 0.85;
  flex-shrink: 0;
}

.panel-nav__link.active .panel-nav__icon { opacity: 1; }

.panel-user {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-user__card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.5rem;
}

.panel-user__avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--panel-sidebar-bg-2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #e2e8f0;
  flex-shrink: 0;
}

.panel-user__meta {
  min-width: 0;
  flex: 1;
}

.panel-user__name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #f1f5f9;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel-user__role {
  margin-top: 0.2rem;
}

.panel-main {
  flex: 1;
  min-width: 0;
  margin-left: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.panel-topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: var(--panel-topbar-h);
  padding: 0 1rem;
  background: var(--panel-surface);
  border-bottom: 1px solid var(--panel-border);
  position: sticky;
  top: 0;
  z-index: 30;
}

.panel-topbar__title {
  font-size: 1rem;
  font-weight: 700;
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel-menu-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius-sm);
  background: var(--panel-surface);
  color: var(--panel-text);
  cursor: pointer;
  flex-shrink: 0;
}

.panel-menu-btn:hover { background: var(--panel-surface-2); }

.panel-content {
  flex: 1;
  padding: 1.75rem 2rem 2.5rem;
  max-width: 1280px;
  width: 100%;
}

/* ---- Page header ---- */

.page-header {
  margin-bottom: 1.75rem;
}

.page-header__row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-header h1 {
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0;
}

.page-header .subtitle {
  color: var(--panel-muted);
  margin: 0.45rem 0 0;
  font-size: 0.95rem;
  max-width: 62ch;
}

/* ---- Messages ---- */

.panel-messages {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.panel-messages li {
  padding: 0.8rem 1rem;
  border-radius: var(--panel-radius-sm);
  font-size: 0.92rem;
  border: 1px solid transparent;
}

.panel-messages .success {
  background: var(--panel-success-bg);
  color: #065f46;
  border-color: #a7f3d0;
}

.panel-messages .error {
  background: var(--panel-danger-bg);
  color: #991b1b;
  border-color: #fecaca;
}

.panel-messages .warning {
  background: var(--panel-warning-bg);
  color: #92400e;
  border-color: #fde68a;
}

.panel-messages .info {
  background: var(--panel-info-bg);
  color: #1e40af;
  border-color: #bfdbfe;
}

/* ---- Cards ---- */

.card {
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  padding: 1.35rem;
  margin-bottom: 1rem;
  box-shadow: var(--panel-shadow);
}

.card--highlight {
  border-color: #c7d2fe;
  background: linear-gradient(180deg, #fff 0%, #fafaff 100%);
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.02em;
}

.card__subtitle {
  color: var(--panel-muted);
  font-size: 0.88rem;
  margin: 0.25rem 0 0;
}

/* ---- Stats ---- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  padding: 1.2rem 1.25rem;
  box-shadow: var(--panel-shadow);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--panel-primary), #8b5cf6);
}

.stat-card .num {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--panel-primary-dark);
  line-height: 1.1;
}

.stat-card .lbl {
  color: var(--panel-muted);
  font-size: 0.88rem;
  margin-top: 0.35rem;
}

/* ---- Quick actions ---- */

.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.quick-action {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--panel-transition), box-shadow var(--panel-transition), transform var(--panel-transition);
}

.quick-action:hover {
  border-color: #c7d2fe;
  box-shadow: var(--panel-shadow-md);
  transform: translateY(-1px);
  color: inherit;
}

.quick-action__icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--panel-primary-soft);
  color: var(--panel-primary-dark);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.quick-action__title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.quick-action__desc {
  font-size: 0.82rem;
  color: var(--panel-muted);
  line-height: 1.4;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--panel-primary);
  color: #fff;
  padding: 0.58rem 1.05rem;
  border-radius: var(--panel-radius-sm);
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 0.92rem;
  line-height: 1.2;
  transition: background var(--panel-transition), box-shadow var(--panel-transition), transform 0.1s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--panel-primary-dark);
  color: #fff;
}

.btn:active { transform: scale(0.98); }

.btn:focus-visible {
  outline: 2px solid var(--panel-primary);
  outline-offset: 2px;
}

.btn-outline {
  background: var(--panel-surface);
  color: var(--panel-primary-dark);
  border: 1px solid #c7d2fe;
}

.btn-outline:hover {
  background: var(--panel-primary-soft);
  color: var(--panel-primary-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--panel-muted);
  border: 1px solid var(--panel-border);
}

.btn-ghost:hover {
  background: var(--panel-surface-2);
  color: var(--panel-text);
}

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

.btn-danger:hover { background: #b91c1c; }

.btn-sm {
  padding: 0.38rem 0.7rem;
  font-size: 0.82rem;
}

.btn-block { width: 100%; }

.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}

/* ---- Badges ---- */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.badge-primary {
  background: var(--panel-primary-soft);
  color: var(--panel-primary-dark);
}

.badge-success {
  background: var(--panel-success-bg);
  color: var(--panel-success);
}

.badge-warning {
  background: var(--panel-warning-bg);
  color: var(--panel-warning);
}

.badge-danger {
  background: var(--panel-danger-bg);
  color: var(--panel-danger);
}

.badge-muted {
  background: #f1f5f9;
  color: var(--panel-muted);
}

.badge-admin {
  background: linear-gradient(135deg, var(--panel-primary), #8b5cf6);
  color: #fff;
}

/* ---- Tables ---- */

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -0.25rem;
  padding: 0 0.25rem;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

table.data-table th,
table.data-table td {
  text-align: left;
  padding: 0.8rem 0.75rem;
  border-bottom: 1px solid var(--panel-border-light);
  vertical-align: middle;
}

table.data-table th {
  color: var(--panel-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--panel-surface-2);
}

table.data-table tbody tr:hover {
  background: #fafbff;
}

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

table.data-table code {
  font-size: 0.82rem;
  background: #f1f5f9;
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
}

/* Legacy table selector */
table:not(.data-table) {
  width: 100%;
  border-collapse: collapse;
}

table:not(.data-table) th,
table:not(.data-table) td {
  text-align: left;
  padding: 0.8rem 0.75rem;
  border-bottom: 1px solid var(--panel-border-light);
}

table:not(.data-table) th {
  color: var(--panel-muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--panel-muted);
}

.empty-state p { margin: 0; }

/* ---- Forms ---- */

.form-row { margin-bottom: 1.1rem; }

.form-row label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  max-width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius-sm);
  font: inherit;
  color: var(--panel-text);
  background: #fff;
  transition: border-color var(--panel-transition), box-shadow var(--panel-transition);
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--panel-primary);
  box-shadow: 0 0 0 3px var(--panel-primary-ring);
}

.form-row small,
.form-help {
  display: block;
  color: var(--panel-muted);
  font-size: 0.84rem;
  margin-top: 0.3rem;
}

.form-card {
  max-width: 520px;
}

.errorlist {
  color: var(--panel-danger);
  list-style: none;
  font-size: 0.86rem;
  margin: 0.3rem 0 0;
  padding: 0;
}

.form-errors {
  color: var(--panel-danger);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

/* ---- Auth pages ---- */

.panel-auth {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(ellipse at top left, rgba(99, 102, 241, 0.12), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.1), transparent 50%),
    var(--panel-bg);
}

.panel-auth__card {
  width: 100%;
  max-width: 420px;
  background: var(--panel-surface);
  border: 1px solid var(--panel-border);
  border-radius: calc(var(--panel-radius) + 2px);
  padding: 2rem;
  box-shadow: var(--panel-shadow-md);
}

.panel-auth__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
  text-decoration: none;
  color: var(--panel-text);
  font-weight: 800;
}

.panel-auth__brand .panel-brand__mark { width: 32px; height: 32px; font-size: 0.75rem; }

.panel-auth h1 {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
}

.panel-auth .subtitle {
  color: var(--panel-muted);
  margin-bottom: 1.5rem;
  font-size: 0.92rem;
}

.panel-auth__footer {
  margin-top: 1.5rem;
  color: var(--panel-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

body.panel-nav-locked {
  overflow: hidden;
  touch-action: none;
}

/* ---- Utilities ---- */

.text-muted { color: var(--panel-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-2 { margin-bottom: 1rem; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ---- Responsive: desktop sidebar always visible ---- */

@media (min-width: 961px) {
  .panel-sidebar {
    transform: translateX(0);
    visibility: visible;
    width: var(--panel-sidebar-w);
  }

  .panel-sidebar.is-open {
    box-shadow: none;
  }

  .panel-sidebar-close {
    display: none;
  }

  .panel-overlay {
    display: none !important;
  }

  .panel-main {
    margin-left: var(--panel-sidebar-w);
    width: auto;
  }

  .panel-topbar {
    display: none;
  }
}

@media (max-width: 960px) {
  .panel-content {
    padding: 1.25rem 1rem 2rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .stats {
    grid-template-columns: 1fr;
  }

  .quick-actions {
    grid-template-columns: 1fr;
  }

  .page-header__row .actions {
    width: 100%;
  }

  .page-header__row .actions .btn {
    flex: 1;
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}