/* ============================================
   SNBL Review Hub - Modern Design System
   ============================================ */

:root {
  /* Colors - Modern Palette */
  --color-background: #f8f9fc;
  --color-surface: #ffffff;
  --color-border: #e5e7f2;
  --color-line: rgba(99, 102, 241, 0.12);
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-muted: #64748b;

  /* Primary Colors */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-darker: #4338ca;
  --color-primary-light: rgba(99, 102, 241, 0.08);
  --color-primary-lighter: rgba(99, 102, 241, 0.04);

  /* Accent Colors */
  --color-accent: #f59e0b;
  --color-accent-secondary: #ec4899;

  /* Status Colors */
  --color-success-bg: rgba(34, 197, 94, 0.1);
  --color-success-border: rgba(22, 163, 74, 0.3);
  --color-success-text: #059669;
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  --color-danger-border: rgba(220, 38, 38, 0.3);
  --color-danger-text: #dc2626;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-warning-border: rgba(217, 119, 6, 0.3);
  --color-warning-text: #d97706;
  --color-info-bg: rgba(59, 130, 246, 0.1);
  --color-info-border: rgba(37, 99, 235, 0.3);
  --color-info-text: #2563eb;

  /* Shadows */
  --shadow-soft: 0 4px 20px -4px rgba(15, 23, 42, 0.08);
  --shadow-card: 0 10px 40px -10px rgba(15, 23, 42, 0.12);
  --shadow-elevated: 0 20px 60px -15px rgba(15, 23, 42, 0.18);
  --shadow-button: 0 4px 14px -2px rgba(99, 102, 241, 0.4);
  --shadow-button-hover: 0 8px 24px -4px rgba(99, 102, 241, 0.5);

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
}

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

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

/* ============================================
   Layout - App Shell
   ============================================ */

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   Header
   ============================================ */

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
  transition: box-shadow var(--transition-base);
}

.app-header:hover {
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* ============================================
   Brand
   ============================================ */

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform var(--transition-fast);
}

.brand:hover {
  transform: translateY(-1px);
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px -8px rgba(99, 102, 241, 0.6);
  transition: all var(--transition-base);
}

.brand:hover .brand-logo {
  box-shadow: 0 12px 32px -8px rgba(99, 102, 241, 0.7);
  transform: rotate(-3deg) scale(1.05);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.brand-name {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-caption {
  font-size: 0.7rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
}

/* ============================================
   Navigation
   ============================================ */

.app-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.app-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
}

.app-nav a {
  position: relative;
  display: block;
  padding: 0.625rem 1rem;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.app-nav a::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.app-nav a:hover {
  color: var(--color-primary);
}

.app-nav a:hover::before {
  opacity: 1;
}

.app-nav a.active {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-darker) 100%);
  color: #fff;
  box-shadow: var(--shadow-button);
}

.app-nav a.active::before {
  opacity: 0;
}

.logout-form {
  margin: 0;
}

.logout-form button {
  background: transparent;
  border: 1.5px solid var(--color-border);
  color: var(--color-muted);
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.logout-form button:hover {
  border-color: var(--color-danger-border);
  color: var(--color-danger-text);
  background: var(--color-danger-bg);
}

/* ============================================
   Main Content
   ============================================ */

.app-main {
  flex: 1;
  padding: 3rem 1.5rem 4rem;
}

.page {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

/* ============================================
   Page Heading
   ============================================ */

.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 0.5rem;
}

h1 {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h3 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

p {
  margin: 0;
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 1.75rem;
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-elevated);
  border-color: rgba(99, 102, 241, 0.2);
}

.card--narrow {
  max-width: 500px;
  width: 100%;
  margin: 0 auto;
}

.card section {
  display: grid;
  gap: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-line);
}

.card-muted {
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ============================================
   Stats Grid
   ============================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.stat-card {
  position: relative;
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-line);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06) 0%, rgba(168, 85, 247, 0.04) 100%);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 0.5rem;
  transition: all var(--transition-base);
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent-secondary) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
  border-color: rgba(99, 102, 241, 0.3);
}

.stat-card:hover::before {
  transform: scaleX(1);
}

.stat-label {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  font-weight: 600;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   Tables
   ============================================ */

.table-card table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

th, td {
  text-align: left;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

th {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  background: var(--color-primary-lighter);
  font-weight: 700;
  border-bottom: 2px solid var(--color-line);
}

th:first-child {
  border-top-left-radius: var(--radius-lg);
}

th:last-child {
  border-top-right-radius: var(--radius-lg);
}

tbody tr {
  transition: all var(--transition-fast);
}

tbody tr:hover {
  background: var(--color-primary-lighter);
}

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

table .muted {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

/* ============================================
   Lists
   ============================================ */

ul.inline-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stack-lg {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ============================================
   Buttons
   ============================================ */

button,
.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  border: none;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-darker) 100%);
  color: #fff;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-button);
  overflow: hidden;
}

button::before,
.button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

button:hover,
.button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-button-hover);
}

button:hover::before,
.button:hover::before {
  opacity: 1;
}

button:active,
.button:active {
  transform: translateY(0);
}

button:disabled,
.button.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

button:disabled:hover,
.button.disabled:hover {
  transform: none;
  box-shadow: none;
}

.button-sm {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.button-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid rgba(99, 102, 241, 0.3);
  box-shadow: none;
}

.button-ghost::before {
  background: var(--color-primary-light);
}

.button-ghost:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-soft);
}

.button-secondary {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1.5px solid rgba(99, 102, 241, 0.3);
  box-shadow: none;
}

.button-secondary:hover {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.button-danger {
  background: transparent;
  color: var(--color-danger-text);
  border: 1.5px solid var(--color-danger-border);
  box-shadow: none;
}

.button-danger::before {
  background: var(--color-danger-bg);
}

.button-danger:hover {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
  border-color: var(--color-danger-text);
  box-shadow: 0 4px 14px -2px rgba(220, 38, 38, 0.3);
}

/* ============================================
   Actions
   ============================================ */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

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

.table-actions form {
  margin: 0;
}

.table-actions .button,
.table-actions button {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
}

/* ============================================
   Forms
   ============================================ */

form {
  display: grid;
  gap: 1.25rem;
}

form.inline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.form-grid {
  display: grid;
  gap: 1.25rem;
}

.form-grid.two-column {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

input,
select,
textarea {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: all var(--transition-base);
}

input:hover,
select:hover,
textarea:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}

.actions input[type="file"] {
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  border: 2px dashed var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-base);
}

.actions input[type="file"]:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-lighter);
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

/* ============================================
   Alerts & Messages
   ============================================ */

.flash,
.error,
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-success-border);
  background: var(--color-success-bg);
  color: var(--color-success-text);
  font-weight: 500;
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.flash::before,
.alert::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-success-text);
  color: white;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.error {
  border-color: var(--color-danger-border);
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}

.error::before {
  content: '!';
  background: var(--color-danger-text);
}

/* ============================================
   Badges
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.025em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid rgba(99, 102, 241, 0.2);
  transition: all var(--transition-fast);
}

.badge:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-soft);
}

/* ============================================
   Empty State
   ============================================ */

.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--color-muted);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--color-border);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.02) 0%, rgba(168, 85, 247, 0.02) 100%);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ============================================
   Scroll Panels
   ============================================ */

.scroll-panels {
  max-height: 280px;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-border);
  padding: 1rem 1.25rem;
  background: var(--color-surface);
}

.scroll-panels label {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 500;
  color: var(--color-text);
  padding: 0.5rem 0;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.scroll-panels label:hover {
  color: var(--color-primary);
}

/* ============================================
   Widget Previews
   ============================================ */

.grid.widgets-preview {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
}

.widget-preview {
  position: relative;
}

.widget-surface {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  background: transparent;
}

.widget-frame {
  width: 100%;
  border: none;
  border-radius: var(--radius-2xl);
  min-height: 340px;
  background: transparent;
}

.widget-preview--compact .widget-surface {
  justify-content: flex-start;
}

.widget-surface--compact {
  max-width: 540px;
}

.widget-surface--standard {
  max-width: 780px;
}

.widget-preview--wide {
  grid-column: 1 / -1;
}

.widget-surface--wide {
  max-width: 1160px;
}

.widget-preview--full {
  grid-column: 1 / -1;
}

.widget-surface--full {
  width: 100%;
  max-width: 1280px;
}

/* ============================================
   Details/Summary
   ============================================ */

details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-muted);
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

details summary:hover {
  color: var(--color-primary);
}

details[open] summary {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

/* ============================================
   Helper Banner
   ============================================ */

.helper-banner {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-darker) 100%);
  color: #fff;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-elevated);
  font-weight: 600;
  font-size: 0.9375rem;
  z-index: 200;
  transition: all var(--transition-base);
  animation: slideInUp 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.helper-banner:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 72px -16px rgba(99, 102, 241, 0.6);
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.muted {
  color: var(--color-muted);
}

/* ============================================
   Footer
   ============================================ */

footer.app-footer {
  margin-top: auto;
  background: transparent;
  padding: 0 1.5rem 2rem;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.875rem;
  text-align: center;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
  .widget-surface--wide,
  .widget-surface--full {
    max-width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }
}

@media (max-width: 900px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.25rem;
  }

  .app-nav {
    width: 100%;
  }

  .app-nav ul {
    width: 100%;
    gap: 0.375rem;
    flex-wrap: wrap;
  }

  .app-main {
    padding: 2rem 1.25rem 3rem;
  }

  .card {
    padding: 1.5rem;
  }

  h1 {
    font-size: 2rem;
  }
}

@media (max-width: 720px) {
  .grid.widgets-preview {
    grid-template-columns: 1fr;
  }

  .widget-frame {
    min-height: 300px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  h1 {
    font-size: 1.75rem;
  }

  .page-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .actions {
    width: 100%;
    flex-direction: column;
  }

  .actions .button,
  .actions button {
    width: 100%;
    justify-content: center;
  }

  th, td {
    padding: 0.75rem;
    font-size: 0.875rem;
  }

  .table-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .table-actions .button,
  .table-actions button {
    width: 100%;
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .app-header,
  .app-nav,
  .logout-form,
  .helper-banner,
  .actions {
    display: none;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}