/* ================================================================
   Training Center Management - style.css
   ================================================================ */

/* ── Variables ───────────────────────────────────────────────── */
:root {
  --primary:       #0d47a1;
  --primary-light: #e3f2fd;
  --primary-dark:  #002171;
  --accent:        #1565c0;
  --success:       #2e7d32;
  --success-light: #e8f5e9;
  --danger:        #c62828;
  --danger-light:  #ffebee;
  --warning:       #e65100;
  --warning-light: #fff3e0;
  --info:          #0277bd;
  --info-light:    #e1f5fe;
  --bg:            #f0f4f8;
  --card-bg:       #ffffff;
  --border:        #dde3ea;
  --text:          #1a2332;
  --text-muted:    #607080;
  --nav-bg:        #0d2c6e;
  --nav-text:      #ffffff;
  --sidebar-w:     230px;
  --radius:        8px;
  --shadow:        0 1px 4px rgba(0,0,0,.10);
  --shadow-lg:     0 4px 16px rgba(0,0,0,.13);
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 15px;
  overflow-x: hidden;
  overflow-y: scroll;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ── Top Nav ─────────────────────────────────────────────────── */
.top-nav {
  background: var(--nav-bg);
  color: var(--nav-text);
  display: flex;
  align-items: center;
  padding: 0 5px;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 6px rgba(0,0,0,.30);
  gap: 12px;
}
.top-nav .brand {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .3px;
  flex: 1;
  color: #fff;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.top-nav .user-info {
  font-size: .82rem;
  color: rgba(255,255,255,.8);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}
.top-nav img { 
  height: 40px; 
  margin-right: 8px; 
  background-color: white; 
  padding: 5px;
  vertical-align: middle;
}
.btn-logout {
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 4px;
  padding: 5px 12px;
  font-size: .82rem;
  white-space: nowrap;
  text-decoration: none;
}
.btn-logout:hover { background: rgba(255,255,255,.25); text-decoration: none; }
.hamburger {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px 6px;
  display: none;
}

/* ── Layout ──────────────────────────────────────────────────── */
.page-wrapper {
  display: flex;
  min-height: calc(100vh - 52px);
}
.sidebar {
  width: var(--sidebar-w);
  background: var(--card-bg);
  border-right: 1px solid var(--border);
  flex-shrink: 0;
  position: sticky;
  top: 52px;
  height: calc(100vh - 52px);
  overflow-y: auto;
}
.main-content {
  flex: 1;
  padding: 24px 20px;
  min-width: 0;
}

/* ── Sidebar Nav ─────────────────────────────────────────────── */
.sidebar-nav { padding: 8px 0 16px; }
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  color: var(--text);
  font-size: .9rem;
  border-left: 3px solid transparent;
  transition: background .15s;
}
.sidebar-nav a:hover { background: var(--primary-light); text-decoration: none; }
.sidebar-nav a.active {
  background: var(--primary-light);
  border-left-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}
.sidebar-section {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  padding: 10px 16px 4px;
}
.nav-icon { font-size: 1rem; width: 20px; text-align: center; }
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 150;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}
.card-header {
  background: var(--primary-light);
  border-bottom: 1px solid var(--border);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-header h2 { font-size: 1rem; font-weight: 700; color: var(--primary-dark); margin: 0; }
.card-body { padding: 18px; }

/* ── Page header ─────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}
.page-header h1 { font-size: 1.4rem; font-weight: 700; color: var(--text); }

/* ── Stat tiles ──────────────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.stat-tile {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-tile .num { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-tile .lbl { font-size: .8rem; color: var(--text-muted); margin-top: 2px; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  border-radius: 5px;
  font-size: .88rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, opacity .15s;
  white-space: nowrap;
  height: 30px;
}
.btn:hover { opacity: .88; text-decoration: none; }
.btn-primary   { background: var(--primary); color: #fff; }
.btn-success   { background: var(--success); color: #fff; }
.btn-danger    { background: var(--danger);  color: #fff; }
.btn-warning   { background: var(--warning); color: #fff; }
.btn-info      { background: var(--info);    color: #fff; }
.btn-secondary { background: #607d8b;         color: #fff; }
.btn-outline   { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-sm        { padding: 4px 10px; font-size: .8rem; height: 25px;}
.btn-group     { display: flex; gap: 6px; flex-wrap: wrap; }

/* ── Forms ───────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: .93rem;
  color: var(--text);
  background: #fff;
  transition: border-color .15s;
  font-size: 16px;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13,71,161,.12);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.form-section {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--primary);
  border-bottom: 1px solid var(--primary-light);
  padding-bottom: 4px;
  margin: 20px 0 14px;
}

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
thead th {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
  text-align: left;
}
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f8f9fc; }
td { padding: 10px 12px; vertical-align: middle; }

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: .73rem;
  font-weight: 700;
  white-space: nowrap;
}
.badge-l2 { background: #e8f5e9; color: #1b5e20; }
.badge-l3 { background: #e3f2fd; color: #0d47a1; }
.badge-l4 { background: #f3e5f5; color: #4a148c; }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger  { background: var(--danger-light);  color: var(--danger);  }
.badge-info    { background: var(--info-light);     color: var(--info); }
.badge-muted   { background: #eceff1; color: #546e7a; }
.badge-super   { background: var(--accent); color: #fff; }

/* ── Alerts ──────────────────────────────────────────────────── */
.success-flash, .error-flash, .info-flash {
  padding: 10px 16px;
  border-radius: 5px;
  margin-bottom: 16px;
  font-size: .9rem;
  font-weight: 500;
}
.success-flash { background: var(--success-light); color: var(--success); border: 1px solid #a5d6a7; }
.error-flash   { background: var(--danger-light);  color: var(--danger);  border: 1px solid #ef9a9a; }
.info-flash    { background: var(--info-light);    color: var(--info);    border: 1px solid #81d4fa; }

/* ── Document grid ───────────────────────────────────────────── */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.doc-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.doc-card .doc-title {
  font-weight: 600;
  font-size: .92rem;
  color: var(--text);
  margin-bottom: 2px;
}
.doc-card .doc-source {
  font-size: .75rem;
  color: var(--text-muted);
}
.doc-card .doc-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }

/* ── Login ───────────────────────────────────────────────────── */
.login-wrapper {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
}
.login-box h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-dark);
  text-align: center;
  margin-bottom: 6px;
}
.login-box .subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: .88rem;
  margin-bottom: 24px;
}

/* ── Misc ────────────────────────────────────────────────────── */
.text-muted    { color: var(--text-muted); }
.text-danger   { color: var(--danger); }
.text-success  { color: var(--success); }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: .95rem; }

/* ── Print ───────────────────────────────────────────────────── */
@media print {
  .top-nav, .sidebar, .sidebar-backdrop, .btn, .page-header .btn { display: none !important; }
  .main-content { padding: 0; }
  .page-wrapper { display: block; }
}

/* ── Mobile ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hamburger { display: block; }
  .page-wrapper { display: block; }
  .sidebar {
    position: fixed;
    top: 52px;
    left: 0;
    height: calc(100vh - 52px);
    z-index: 160;
    transform: translateX(-100%);
    transition: transform .25s ease;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop.open { display: block; }
  .main-content { padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .top-nav .user-info { display: none !important; }
}