/* ================================================================
   Simulation Platform v3 — Global Design System
   Modern Dark Theme with Inter + JetBrains Mono
   ================================================================ */

:root {
  --neutral-0: #09090B; --neutral-50: #111114; --neutral-100: #141419;
  --neutral-200: #1C1C22; --neutral-300: #27272A; --neutral-400: #3F3F46;
  --neutral-500: #52525B; --neutral-600: #71717A; --neutral-700: #A1A1AA;
  --neutral-800: #D4D4D8; --neutral-900: #E4E4E7; --neutral-950: #FAFAFA;
  --primary-500: #6366F1; --primary-400: #818CF8; --primary-600: #4F46E5;
  --trust: #38BDF8; --innovation: #A78BFA;
  --success: #34D399; --warning: #FBBF24; --error: #F87171;
  --success-dim: rgba(52,211,153,.12); --warning-dim: rgba(251,191,36,.12); --error-dim: rgba(248,113,113,.12);
  --gradient-bg: linear-gradient(135deg, var(--neutral-0) 0%, #0F0F1A 100%);
  --gradient-card: linear-gradient(145deg, var(--neutral-200) 0%, var(--neutral-100) 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.5);
  --shadow-md: 0 4px 12px rgba(0,0,0,.5);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.6);
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 16px;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--gradient-bg);
  color: var(--neutral-950);
  min-height: 100vh;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

code, pre, .mono { font-family: 'JetBrains Mono', monospace; font-size: 0.85em; }

a { color: var(--primary-400); text-decoration: none; }
a:hover { color: var(--primary-500); }

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

.top-nav {
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px; height: 56px;
  background: var(--neutral-100); border-bottom: 1px solid var(--neutral-300);
  position: sticky; top: 0; z-index: 100;
}
.nav-brand { font-weight: 700; font-size: 1rem; color: var(--neutral-950); letter-spacing: -0.02em; }
.nav-back { color: var(--neutral-700); font-size: 0.85rem; font-weight: 500; }
.nav-back:hover { color: var(--neutral-950); }
.nav-title { font-weight: 600; font-size: 0.9rem; color: var(--neutral-800); }
.nav-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.nav-link { color: var(--neutral-700); font-size: 0.8rem; font-weight: 500; }
.nav-link:hover { color: var(--neutral-950); }
.nav-user { color: var(--neutral-700); font-size: 0.8rem; }
.nav-tenant { color: var(--trust); font-size: 0.75rem; font-weight: 500; background: rgba(56,189,248,.1); padding: 2px 8px; border-radius: 4px; }
.nav-badge { font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; padding: 2px 8px; border-radius: 4px; background: var(--neutral-300); color: var(--neutral-700); }
.nav-badge--superadmin { background: rgba(248,113,113,.15); color: var(--error); }
.nav-badge--admin { background: rgba(251,191,36,.15); color: var(--warning); }

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

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm); border: 1px solid var(--neutral-400);
  background: var(--neutral-200); color: var(--neutral-950); font-size: 0.85rem;
  font-weight: 500; cursor: pointer; transition: all 0.15s ease;
  text-decoration: none; font-family: inherit;
}
.btn:hover { background: var(--neutral-300); border-color: var(--neutral-500); }
.btn-primary { background: var(--primary-600); border-color: var(--primary-600); color: #fff; }
.btn-primary:hover { background: var(--primary-500); border-color: var(--primary-500); color: #fff; }
.btn-outline { background: transparent; }
.btn-sm { padding: 4px 10px; font-size: 0.75rem; }
.btn-block { width: 100%; }

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

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 500; color: var(--neutral-700); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea,
.admin-form-inline input, .admin-form-inline select {
  width: 100%; padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--neutral-400); background: var(--neutral-200); color: var(--neutral-950);
  font-size: 0.85rem; font-family: inherit; transition: border-color 0.15s;
}
.form-group input:focus, .admin-form-inline input:focus, .admin-form-inline select:focus {
  outline: none; border-color: var(--primary-500); box-shadow: 0 0 0 3px rgba(99,102,241,.2);
}

/* ================================================================
   Alerts
   ================================================================ */

.alert { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.85rem; margin-bottom: 16px; }
.alert-error { background: var(--error-dim); color: var(--error); border: 1px solid rgba(248,113,113,.3); }

/* ================================================================
   Login Page
   ================================================================ */

.login-page {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
  background: var(--gradient-bg);
}
.login-container { width: 100%; max-width: 400px; padding: 24px; }
.login-card {
  background: var(--gradient-card); border: 1px solid var(--neutral-300); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-lg);
}
.login-header { text-align: center; margin-bottom: 24px; }
.login-header h1 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.03em; }
.login-subtitle { color: var(--neutral-700); font-size: 0.85rem; margin-top: 4px; }
.login-badge { text-align: center; margin-top: 16px; font-size: 0.7rem; color: var(--neutral-600); text-transform: uppercase; letter-spacing: 0.05em; }

/* ================================================================
   Dashboard
   ================================================================ */

.dashboard-main { max-width: 1200px; margin: 0 auto; padding: 32px 24px; }
.dashboard-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 24px; letter-spacing: -0.02em; }
.modules-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.module-card {
  display: flex; align-items: flex-start; gap: 14px; padding: 20px;
  background: var(--gradient-card); border: 1px solid var(--neutral-300); border-radius: var(--radius-md);
  transition: all 0.2s ease; cursor: pointer; position: relative; overflow: hidden; text-decoration: none; color: inherit;
}
.module-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%;
  background: var(--card-accent, var(--primary-500));
}
.module-card:hover { border-color: var(--neutral-400); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.module-icon { font-size: 1.8rem; flex-shrink: 0; margin-top: 2px; }
.module-info h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; color: var(--neutral-950); }
.module-info p { font-size: 0.8rem; color: var(--neutral-700); line-height: 1.4; }
.module-category { position: absolute; top: 10px; right: 12px; font-size: 0.6rem; text-transform: uppercase; color: var(--neutral-600); letter-spacing: 0.08em; font-weight: 600; }

/* Module page wrapper */
.module-page { display: flex; flex-direction: column; height: calc(100vh - 56px); }
.module-container { flex: 1; width: 100%; overflow: auto; }

/* ================================================================
   Profile
   ================================================================ */

.profile-main { max-width: 900px; margin: 0 auto; padding: 32px 24px; }
.profile-header { margin-bottom: 32px; }
.profile-header h2 { font-size: 1.5rem; font-weight: 700; }
.profile-meta { color: var(--neutral-700); font-size: 0.85rem; margin-top: 4px; }
.profile-section { margin-bottom: 32px; }
.profile-section h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 16px; border-bottom: 1px solid var(--neutral-300); padding-bottom: 8px; }
.sessions-grid, .progress-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.session-card, .progress-card {
  background: var(--neutral-200); border: 1px solid var(--neutral-300); border-radius: var(--radius-sm);
  padding: 14px; font-size: 0.8rem;
}
.session-module, .progress-module { font-weight: 600; color: var(--primary-400); margin-bottom: 4px; }
.session-score { color: var(--success); font-weight: 600; }
.session-rating { background: var(--success-dim); color: var(--success); padding: 1px 6px; border-radius: 3px; font-size: 0.7rem; font-weight: 600; }
.session-date, .progress-date { color: var(--neutral-600); font-size: 0.7rem; margin-top: 4px; }
.progress-key { color: var(--neutral-700); }
.progress-value { font-weight: 700; font-size: 1.1rem; color: var(--neutral-950); }
.empty-state { color: var(--neutral-600); font-size: 0.85rem; font-style: italic; }

/* ================================================================
   Admin Pages
   ================================================================ */

.admin-main { max-width: 1100px; margin: 0 auto; padding: 32px 24px; }
.admin-header { margin-bottom: 24px; }
.admin-header h2 { font-size: 1.5rem; font-weight: 700; }
.admin-card {
  background: var(--neutral-200); border: 1px solid var(--neutral-300); border-radius: var(--radius-md);
  padding: 24px; margin-bottom: 20px;
}
.admin-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 12px; }
.admin-hint { color: var(--neutral-600); font-size: 0.8rem; margin-bottom: 16px; }
.admin-form-inline { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.admin-form-inline input, .admin-form-inline select { width: auto; flex: 1; min-width: 140px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.admin-table th { text-align: left; padding: 10px 12px; color: var(--neutral-700); font-weight: 600; border-bottom: 1px solid var(--neutral-400); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }
.admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--neutral-300); }
.admin-table tr:hover td { background: var(--neutral-100); }
.actions-cell { display: flex; gap: 6px; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; vertical-align: middle; }
.status-dot.active { background: var(--success); }
.status-dot.inactive { background: var(--error); }

/* Module toggle grid */
.module-toggle-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }
.module-toggle-card {
  display: flex; align-items: center; gap: 12px; padding: 14px;
  background: var(--neutral-100); border: 1px solid var(--neutral-300); border-radius: var(--radius-sm);
  position: relative;
}
.module-toggle-card::before { content:''; position:absolute; left:0; top:0; width:3px; height:100%; background:var(--card-accent,var(--primary-500)); border-radius:3px 0 0 3px; }
.module-toggle-icon { font-size: 1.5rem; }
.module-toggle-info h4 { font-size: 0.85rem; font-weight: 600; }
.module-toggle-info p { font-size: 0.7rem; color: var(--neutral-600); }

/* Metrics */
.metrics-overview { display: flex; gap: 16px; margin-bottom: 24px; }
.metric-tile {
  flex: 1; background: var(--neutral-200); border: 1px solid var(--neutral-300); border-radius: var(--radius-md);
  padding: 20px; text-align: center;
}
.metric-tile-value { font-size: 2rem; font-weight: 800; color: var(--primary-400); }
.metric-tile-label { font-size: 0.75rem; color: var(--neutral-600); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 4px; }
.modules-grid--small { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.module-card--small { padding: 12px; }
.module-card--small .module-icon { font-size: 1.3rem; }
.module-card--small .module-info h3 { font-size: 0.8rem; }

/* Error page */
.error-page { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 60vh; text-align: center; padding: 24px; }
.error-code { font-size: 5rem; font-weight: 800; color: var(--neutral-400); letter-spacing: -0.04em; }
.error-message { color: var(--neutral-700); font-size: 1rem; margin: 12px 0 24px; }

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

@media (max-width: 640px) {
  .top-nav { padding: 0 12px; gap: 8px; }
  .modules-grid { grid-template-columns: 1fr; }
  .admin-form-inline { flex-direction: column; }
  .admin-form-inline input, .admin-form-inline select { width: 100%; }
  .metrics-overview { flex-direction: column; }
}