/* ==========================================================================
   SOL DISCUSS - REAL SUPABASE STUDIO DARK UI SYSTEM
   High-Utility • Dual Navigation • Monospace Types • Studio Table Grid
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Supabase Canonical Carbon Palette */
  --sb-bg-base: #121212;
  --sb-bg-rail: #151515;
  --sb-bg-sidebar: #181818;
  --sb-bg-topbar: #181818;
  --sb-bg-card: #1c1c1c;
  --sb-bg-card-hover: #222222;
  --sb-bg-surface: #1e1e1e;
  --sb-bg-input: #141414;
  --sb-bg-code: #0d0d0d;

  /* Borders */
  --sb-border-subtle: #242424;
  --sb-border-main: #2a2a2a;
  --sb-border-strong: #383838;
  --sb-border-focus: #3ECF8E;

  /* Supabase Brand Emerald */
  --sb-brand: #3ECF8E;
  --sb-brand-hover: #34b27b;
  --sb-brand-active: #289e6c;
  --sb-brand-glow: rgba(62, 207, 142, 0.25);
  --sb-brand-dim: rgba(62, 207, 142, 0.12);
  --sb-brand-border: rgba(62, 207, 142, 0.32);

  /* Typography */
  --sb-text-title: #EDEDED;
  --sb-text-body: #D4D4D8;
  --sb-text-muted: #A1A1AA;
  --sb-text-subtle: #71717A;
  --sb-text-inverse: #0D1117;

  /* Status Accents (Glass Pill Badges) */
  --sb-badge-green-bg: rgba(62, 207, 142, 0.12);
  --sb-badge-green-text: #3ECF8E;
  --sb-badge-green-border: rgba(62, 207, 142, 0.28);

  --sb-badge-blue-bg: rgba(56, 189, 248, 0.12);
  --sb-badge-blue-text: #38BDF8;
  --sb-badge-blue-border: rgba(56, 189, 248, 0.28);

  --sb-badge-purple-bg: rgba(168, 85, 247, 0.12);
  --sb-badge-purple-text: #C084FC;
  --sb-badge-purple-border: rgba(168, 85, 247, 0.28);

  --sb-badge-amber-bg: rgba(245, 158, 11, 0.12);
  --sb-badge-amber-text: #FBBF24;
  --sb-badge-amber-border: rgba(245, 158, 11, 0.28);

  --sb-badge-red-bg: rgba(239, 68, 68, 0.12);
  --sb-badge-red-text: #F87171;
  --sb-badge-red-border: rgba(239, 68, 68, 0.28);

  /* Dimensions & Radius */
  --radius-card: 10px;
  --radius-sm: 6px;
  --radius-pill: 9999px;

  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Compatibility aliases */
  --primary-dark: #3ECF8E;
  --text-main: var(--sb-text-title);
  --text-muted: var(--sb-text-muted);
  --text-subtle: var(--sb-text-subtle);
  --card-bg: var(--sb-bg-card);
  --card-border: var(--sb-border-main);
  --border-radius-card: var(--radius-card);
  --border-radius-sm: var(--radius-sm);
  --border-radius-pill: var(--radius-pill);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--sb-bg-base);
  color: var(--sb-text-body);
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Custom Supabase Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--sb-bg-base);
}
::-webkit-scrollbar-thumb {
  background: #2a2a2a;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #3a3a3a;
}

/* App Outer Shell Container */
.dashboard-app-wrapper {
  width: 100%;
  min-height: 100vh;
  background: var(--sb-bg-base);
  display: flex;
  overflow-x: hidden;
  position: relative;
}

/* ==========================================================================
   SUPABASE STUDIO DUAL-TIER NAVIGATION SIDEBAR
   ========================================================================== */
.sb-sidebar-container {
  display: flex;
  height: 100vh;
  position: sticky;
  top: 0;
  z-index: 50;
  flex-shrink: 0;
}

/* Leftmost Rail (54px) */
.sb-nav-rail {
  width: 52px;
  min-width: 52px;
  background: var(--sb-bg-rail);
  border-right: 1px solid var(--sb-border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  height: 100vh;
}

.sb-rail-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.sb-rail-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #1e1e1e;
  border: 1px solid var(--sb-border-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sb-brand);
  text-decoration: none;
  transition: all 0.18s ease;
  box-shadow: 0 0 12px rgba(62, 207, 142, 0.15);
}

.sb-rail-logo:hover {
  border-color: var(--sb-brand);
  transform: scale(1.05);
  box-shadow: 0 0 18px rgba(62, 207, 142, 0.3);
}

.sb-rail-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  width: 100%;
}

.sb-rail-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sb-text-subtle);
  text-decoration: none;
  transition: all 0.15s ease;
  position: relative;
  border: 1px solid transparent;
}

.sb-rail-btn:hover {
  background: #222222;
  color: var(--sb-text-title);
  border-color: var(--sb-border-subtle);
}

.sb-rail-btn.active {
  background: rgba(62, 207, 142, 0.12);
  color: var(--sb-brand);
  border-color: var(--sb-brand-border);
}

.sb-rail-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
  margin-top: auto;
}

/* Secondary Navigation Sub-Panel (210px) */
.sb-sub-panel {
  width: 215px;
  min-width: 215px;
  background: var(--sb-bg-sidebar);
  border-right: 1px solid var(--sb-border-subtle);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sb-sub-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--sb-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sb-project-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--sb-text-title);
  text-decoration: none;
}

.sb-status-dot {
  width: 7px;
  height: 7px;
  background: var(--sb-brand);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--sb-brand);
}

.sb-sub-nav-section {
  padding: 12px 10px 6px 10px;
}

.sb-sub-nav-title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--sb-text-subtle);
  padding: 4px 8px;
  margin-bottom: 2px;
}

.sb-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--sb-text-muted);
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 500;
  transition: all 0.12s ease;
  margin-bottom: 2px;
  border: 1px solid transparent;
}

.sb-nav-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.sb-nav-item-left span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font-mono);
  font-size: 12px;
}

.sb-nav-item:hover {
  background: #202020;
  color: var(--sb-text-title);
  border-color: var(--sb-border-subtle);
}

.sb-nav-item.active {
  background: #242424;
  color: var(--sb-text-title);
  font-weight: 600;
  border-color: var(--sb-border-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.sb-nav-item.active .sb-nav-item-left {
  color: var(--sb-brand);
}

.sb-count-pill {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  background: #202020;
  color: var(--sb-text-subtle);
  border: 1px solid var(--sb-border-subtle);
}

.sb-count-pill.pending {
  background: rgba(239, 68, 68, 0.15);
  color: #F87171;
  border-color: rgba(239, 68, 68, 0.3);
}

/* ==========================================================================
   MAIN CANVAS & TOP BAR
   ========================================================================== */
.dashboard-main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--sb-bg-base);
  overflow-y: auto;
  min-height: 100vh;
}

.dashboard-topbar {
  height: 52px;
  background: var(--sb-bg-topbar);
  border-bottom: 1px solid var(--sb-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
}

.topbar-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--sb-text-muted);
}

.topbar-breadcrumbs strong {
  color: var(--sb-text-title);
  font-weight: 700;
}

.topbar-breadcrumbs .divider {
  color: var(--sb-text-subtle);
}

.topbar-search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--sb-bg-input);
  border: 1px solid var(--sb-border-main);
  padding: 5px 12px;
  border-radius: 6px;
  width: 280px;
  color: var(--sb-text-subtle);
  font-size: 12px;
}

.topbar-search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--sb-text-title);
  font-size: 12px;
  width: 100%;
}

.topbar-search-box kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  background: #242424;
  border: 1px solid var(--sb-border-main);
  padding: 1px 4px;
  border-radius: 4px;
  color: var(--sb-text-subtle);
}

.topbar-actions-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-env-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--sb-brand);
  background: var(--sb-badge-green-bg);
  border: 1px solid var(--sb-badge-green-border);
  padding: 2px 8px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.topbar-user-avatar-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 10px 3px 4px;
  background: #202020;
  border: 1px solid var(--sb-border-main);
  border-radius: 9999px;
  text-decoration: none;
  transition: all 0.15s ease;
}

.topbar-user-avatar-pill:hover {
  border-color: var(--sb-brand-border);
  background: #252525;
}

.topbar-user-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--sb-text-title);
}

/* ==========================================================================
   SUPABASE TABLE TOOLBAR & HEADER (STUDIO TABLE LOOK)
   ========================================================================== */
.sb-table-toolbar {
  padding: 16px 24px 12px 24px;
  border-bottom: 1px solid var(--sb-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  background: #141414;
}

.sb-table-toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.sb-table-identity {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sb-schema-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--sb-text-subtle);
  background: #202020;
  border: 1px solid var(--sb-border-subtle);
  padding: 2px 6px;
  border-radius: 4px;
}

.sb-table-title {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--sb-text-title);
}

.sb-rows-count-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sb-text-muted);
  background: #1c1c1c;
  border: 1px solid var(--sb-border-main);
  padding: 2px 8px;
  border-radius: 9999px;
}

.sb-table-toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sb-filter-input {
  background: var(--sb-bg-input);
  border: 1px solid var(--sb-border-main);
  color: var(--sb-text-title);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 6px;
  outline: none;
  min-width: 220px;
  transition: border-color 0.15s ease;
}

.sb-filter-input:focus {
  border-color: var(--sb-brand);
}

/* ==========================================================================
   BUTTONS (SUPABASE CANONICAL BUTTON SYSTEM)
   ========================================================================== */
.btn-primary-dark, .sb-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--sb-brand);
  color: var(--sb-text-inverse) !important;
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid rgba(62, 207, 142, 0.6);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 0 10px rgba(62, 207, 142, 0.18);
  white-space: nowrap;
}

.btn-primary-dark:hover, .sb-btn-primary:hover {
  background: var(--sb-brand-hover);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5), 0 0 14px rgba(62, 207, 142, 0.28);
}

.sb-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: #202020;
  color: var(--sb-text-body);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--sb-border-main);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.12s ease;
  white-space: nowrap;
}

.sb-btn-secondary:hover {
  background: #262626;
  color: var(--sb-text-title);
  border-color: var(--sb-border-strong);
}

.btn-pill-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: #1c1c1c;
  color: var(--sb-text-body);
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 5px;
  border: 1px solid var(--sb-border-main);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.12s ease;
}

.btn-pill-action:hover {
  background: #262626;
  color: var(--sb-text-title);
  border-color: var(--sb-border-strong);
}

.btn-approve {
  background: var(--sb-badge-green-bg);
  color: var(--sb-badge-green-text);
  border-color: var(--sb-badge-green-border);
}
.btn-approve:hover {
  background: rgba(62, 207, 142, 0.22);
  border-color: var(--sb-brand);
}

.btn-view {
  background: var(--sb-badge-blue-bg);
  color: var(--sb-badge-blue-text);
  border-color: var(--sb-badge-blue-border);
}
.btn-view:hover {
  background: rgba(56, 189, 248, 0.22);
}

.btn-delete, .btn-reject {
  background: var(--sb-badge-red-bg);
  color: var(--sb-badge-red-text);
  border-color: var(--sb-badge-red-border);
}
.btn-delete:hover, .btn-reject:hover {
  background: rgba(239, 68, 68, 0.22);
}

.btn-mini-preset {
  background: #1c1c1c;
  border: 1px solid var(--sb-border-main);
  color: var(--sb-text-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.12s ease;
}
.btn-mini-preset:hover {
  background: #262626;
  color: var(--sb-brand);
  border-color: var(--sb-brand-border);
}

/* ==========================================================================
   SUPABASE STUDIO DATA TABLES (GRID WITH MONOSPACE COLUMN TYPES)
   ========================================================================== */
.management-table-card {
  margin: 0;
  background: var(--sb-bg-base);
  border: none;
  border-radius: 0;
  overflow: hidden;
  flex: 1;
}

.modern-data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 12.5px;
}

.modern-data-table thead {
  background: #161616;
  border-bottom: 1px solid var(--sb-border-main);
  position: sticky;
  top: 0;
  z-index: 10;
}

.modern-data-table th {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--sb-text-subtle);
  white-space: nowrap;
  border-right: 1px solid #1f1f1f;
}

.modern-data-table th:last-child {
  border-right: none;
}

.sb-col-type {
  font-size: 10px;
  font-weight: 500;
  color: #555555;
  margin-left: 4px;
}

.modern-data-table tbody tr {
  border-bottom: 1px solid var(--sb-border-subtle);
  transition: background 0.1s ease;
}

.modern-data-table tbody tr:hover {
  background: #1a1a1a;
}

.modern-data-table td {
  padding: 11px 16px;
  vertical-align: middle;
  color: var(--sb-text-body);
  border-right: 1px solid #1a1a1a;
}

.modern-data-table td:last-child {
  border-right: none;
}

/* ==========================================================================
   BADGES & PILLS
   ========================================================================== */
.subject-code-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: #171717;
  color: var(--sb-brand);
  border: 1px solid rgba(62, 207, 142, 0.3);
}

.badge-common {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--sb-badge-green-bg);
  color: var(--sb-badge-green-text);
  border: 1px solid var(--sb-badge-green-border);
}

.badge-course {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--sb-badge-purple-bg);
  color: var(--sb-badge-purple-text);
  border: 1px solid var(--sb-badge-purple-border);
}

.badge-sem {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--sb-badge-blue-bg);
  color: var(--sb-badge-blue-text);
  border: 1px solid var(--sb-badge-blue-border);
}

.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
}

.badge-status.approved {
  background: var(--sb-badge-green-bg);
  color: var(--sb-badge-green-text);
  border: 1px solid var(--sb-badge-green-border);
}

.badge-status.pending {
  background: var(--sb-badge-amber-bg);
  color: var(--sb-badge-amber-text);
  border: 1px solid var(--sb-badge-amber-border);
}

.badge-status.rejected {
  background: var(--sb-badge-red-bg);
  color: var(--sb-badge-red-text);
  border: 1px solid var(--sb-badge-red-border);
}

/* Supabase Boolean Pills */
.sb-bool-true {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--sb-brand);
  background: var(--sb-badge-green-bg);
  border: 1px solid var(--sb-badge-green-border);
  padding: 2px 7px;
  border-radius: 4px;
}

.sb-bool-false {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: #F87171;
  background: var(--sb-badge-red-bg);
  border: 1px solid var(--sb-badge-red-border);
  padding: 2px 7px;
  border-radius: 4px;
}

/* ==========================================================================
   DASHBOARD OVERVIEW CARDS & METRICS
   ========================================================================== */
.sb-overview-container {
  padding: 24px 28px;
}

.sb-health-banner {
  background: #171717;
  border: 1px solid var(--sb-border-main);
  border-radius: 8px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.sb-health-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sb-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.sb-metric-card {
  background: var(--sb-bg-card);
  border: 1px solid var(--sb-border-main);
  border-radius: 8px;
  padding: 18px 20px;
  transition: all 0.15s ease;
}

.sb-metric-card:hover {
  border-color: var(--sb-border-strong);
  background: var(--sb-bg-card-hover);
}

.sb-metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.sb-metric-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--sb-text-muted);
}

.sb-metric-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  color: var(--sb-text-title);
  letter-spacing: -0.02em;
}

.sb-metric-footer {
  margin-top: 6px;
  font-size: 11.5px;
  color: var(--sb-text-subtle);
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Table Quick Jump Navigator Cards */
.sb-tables-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.sb-table-card {
  background: var(--sb-bg-card);
  border: 1px solid var(--sb-border-main);
  border-radius: 8px;
  padding: 16px 18px;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sb-table-card:hover {
  border-color: var(--sb-brand-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.sb-table-card-top {
  margin-bottom: 14px;
}

.sb-table-card-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--sb-text-title);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}

.sb-table-card-desc {
  font-size: 12px;
  color: var(--sb-text-muted);
  line-height: 1.4;
}

.sb-table-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--sb-border-subtle);
}

/* ==========================================================================
   FORM CONTROLS & MODALS (STUDIO ROW EDITOR)
   ========================================================================== */
.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--sb-text-muted);
  margin-bottom: 6px;
}

.form-label code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sb-brand);
}

.form-control {
  width: 100%;
  background: var(--sb-bg-input);
  border: 1px solid var(--sb-border-main);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--sb-text-title);
  outline: none;
  transition: border-color 0.15s ease;
  font-family: var(--font-sans);
}

.form-control:focus {
  border-color: var(--sb-brand);
  box-shadow: 0 0 0 1px var(--sb-brand);
}

select.form-control option {
  background: #1c1c1c;
  color: #EDEDED;
}

textarea.form-control {
  resize: vertical;
  min-height: 70px;
}

/* Studio Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-dialog-box {
  background: #181818;
  border: 1px solid var(--sb-border-main);
  border-radius: 10px;
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  position: relative;
}

.modal-dialog-box.modal-large {
  max-width: 760px;
}

.modal-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--sb-border-subtle);
}

/* ==========================================================================
   STUDIO AUTHENTICATION / LOGIN VIEW
   ========================================================================== */
.login-page-body {
  background: radial-gradient(ellipse 80% 80% at 50% -20%, rgba(62, 207, 142, 0.15), rgba(18, 18, 18, 1));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-container-card {
  width: 100%;
  max-width: 380px;
  background: #181818;
  border: 1px solid var(--sb-border-main);
  border-radius: 12px;
  padding: 32px 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  position: relative;
}

.login-container-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--sb-brand), transparent);
}

.login-logo-box {
  width: 44px;
  height: 44px;
  background: #141414;
  border: 1px solid var(--sb-border-main);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 0 20px rgba(62, 207, 142, 0.2);
}

.login-alert {
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 18px;
}

.login-alert.danger {
  background: var(--sb-badge-red-bg);
  border: 1px solid var(--sb-badge-red-border);
  color: var(--sb-badge-red-text);
}

.demo-credentials-pill {
  margin-top: 22px;
  padding: 12px 14px;
  background: #131313;
  border: 1px solid var(--sb-border-subtle);
  border-radius: 6px;
  font-size: 11.5px;
  color: var(--sb-text-muted);
  line-height: 1.6;
}

.demo-credentials-pill code {
  color: var(--sb-brand);
  font-family: var(--font-mono);
}

/* Chip Selector Grid for Semesters & Courses */
.chip-selector-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.chip-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #1c1c1c;
  border: 1px solid var(--sb-border-main);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  color: var(--sb-text-muted);
  transition: all 0.12s ease;
}

.chip-checkbox-label:hover {
  background: #252525;
  color: var(--sb-text-title);
  border-color: var(--sb-border-strong);
}

.chip-checkbox-label input[type="checkbox"]:checked + span,
.chip-checkbox-label input[type="radio"]:checked + span {
  color: var(--sb-brand);
  font-weight: 700;
}

/* ==========================================================================
   SUBJECTS GRID & MODERN STUDIO CARDS
   ========================================================================== */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 16px;
}

.subject-card {
  background: #181818;
  border: 1px solid var(--sb-border-main);
  border-radius: 10px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.subject-card:hover {
  background: #1c1c1c;
  border-color: var(--sb-border-strong);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(62, 207, 142, 0.15);
  transform: translateY(-2px);
}

.subject-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.subject-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.subject-code-tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(62, 207, 142, 0.12);
  color: var(--sb-brand);
  border: 1px solid rgba(62, 207, 142, 0.3);
  letter-spacing: 0.02em;
}

.badge-category-pill {
  font-family: var(--font-sans);
  font-size: 10.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-category-aec {
  background: rgba(56, 189, 248, 0.12);
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-category-dsc {
  background: rgba(168, 85, 247, 0.12);
  color: #C084FC;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.badge-category-vac {
  background: rgba(245, 158, 11, 0.12);
  color: #FBBF24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-category-sec {
  background: rgba(244, 63, 94, 0.12);
  color: #FB7185;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.badge-category-ge {
  background: rgba(99, 102, 241, 0.12);
  color: #818CF8;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-category-dse {
  background: rgba(234, 88, 12, 0.12);
  color: #FB923C;
  border: 1px solid rgba(234, 88, 12, 0.3);
}

.subject-credits-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--sb-text-muted);
  background: #141414;
  border: 1px solid var(--sb-border-main);
  padding: 3px 8px;
  border-radius: 5px;
  white-space: nowrap;
}

.subject-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--sb-text-title);
  margin: 0 0 6px 0;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.subject-card-desc {
  font-size: 12.5px;
  color: var(--sb-text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.subject-meta-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.badge-scope {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 6px;
  line-height: 1;
}

.badge-scope-all {
  background: rgba(62, 207, 142, 0.1);
  color: #3ECF8E;
  border: 1px solid rgba(62, 207, 142, 0.28);
}

.badge-scope-course {
  background: rgba(168, 85, 247, 0.1);
  color: #C084FC;
  border: 1px solid rgba(168, 85, 247, 0.28);
}

.badge-scope-sem {
  background: rgba(56, 189, 248, 0.1);
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.28);
}

.subject-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--sb-border-subtle);
  margin-top: auto;
}

.subject-stats-group {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
}

.subject-stat-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.subject-stat-item.stat-notes {
  color: var(--sb-brand);
}

.subject-stat-item.stat-pyqs {
  color: var(--sb-text-muted);
}

.subject-stat-dot {
  color: var(--sb-border-strong);
}

.sb-card-btn-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sb-card-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--sb-border-main);
  background: #202020;
  color: var(--sb-text-body);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  line-height: 1;
}

.sb-card-btn:hover {
  background: #262626;
  color: var(--sb-text-title);
  border-color: var(--sb-border-strong);
}

.sb-card-btn-edit {
  background: rgba(62, 207, 142, 0.08);
  color: #3ECF8E;
  border-color: rgba(62, 207, 142, 0.25);
}

.sb-card-btn-edit:hover {
  background: rgba(62, 207, 142, 0.18);
  color: #3ECF8E;
  border-color: #3ECF8E;
}

.sb-card-btn-notes {
  background: rgba(56, 189, 248, 0.08);
  color: #38BDF8;
  border-color: rgba(56, 189, 248, 0.25);
}

.sb-card-btn-notes:hover {
  background: rgba(56, 189, 248, 0.18);
  color: #38BDF8;
  border-color: #38BDF8;
}

.sb-card-btn-delete {
  background: rgba(239, 68, 68, 0.08);
  color: #F87171;
  border-color: rgba(239, 68, 68, 0.25);
  padding: 5px 8px;
}

.sb-card-btn-delete:hover {
  background: rgba(239, 68, 68, 0.2);
  color: #F87171;
  border-color: #EF4444;
}

/* Responsive */
@media (max-width: 900px) {
  .sb-sub-panel {
    display: none;
  }
  .sb-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .sb-tables-grid {
    grid-template-columns: 1fr;
  }
  .subjects-grid {
    grid-template-columns: 1fr;
  }
}