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

:root {
  --bg:           #0f1117;
  --surface:      #1a1d27;
  --surface-2:    #22263a;
  --surface-3:    #2a2f47;
  --border:       #2e3350;
  --border-light: #3a4060;
  --primary:      #4f7fff;
  --primary-dark: #3b6ae0;
  --primary-glow: rgba(79,127,255,.25);
  --success:      #22c55e;
  --success-bg:   rgba(34,197,94,.12);
  --warning:      #f59e0b;
  --warning-bg:   rgba(245,158,11,.12);
  --error:        #ef4444;
  --error-bg:     rgba(239,68,68,.12);
  --text:         #e2e8f0;
  --text-muted:   #8892aa;
  --text-dim:     #4a5568;
  --radius:       10px;
  --radius-sm:    6px;
  --shadow:       0 4px 16px rgba(0,0,0,.4);
  --transition:   180ms ease;
  --sidebar-w:    220px;
}

html { font-size: 15px; }

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;
}

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

/* ─── Login Screen ───────────────────────────────────────────────────────── */
#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(ellipse at 50% 0%, rgba(79,127,255,.15) 0%, transparent 70%);
}

.login-box {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  box-shadow: var(--shadow);
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo h1 {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -1px;
}

.login-logo p {
  font-size: .82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.login-error {
  background: var(--error-bg);
  border: 1px solid var(--error);
  color: var(--error);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  margin-bottom: 16px;
}

/* ─── Form elements ──────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .9rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-group input::placeholder { color: var(--text-dim); }

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group select option { background: var(--surface-2); }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition), transform var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.btn-primary  { background: var(--primary);    color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }

.btn-success  { background: var(--success);    color: #fff; }
.btn-success:hover:not(:disabled) { filter: brightness(1.1); }

.btn-danger   { background: var(--error);      color: #fff; }
.btn-danger:hover:not(:disabled)  { filter: brightness(1.1); }

.btn-warning  { background: var(--warning);    color: #000; }
.btn-warning:hover:not(:disabled) { filter: brightness(1.1); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-light);
}

.btn-full { width: 100%; }
.btn-sm   { padding: 6px 12px; font-size: .78rem; }
.btn-lg   { padding: 13px 24px; font-size: 1rem; }

/* ─── App shell ──────────────────────────────────────────────────────────── */
#app {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 50;
  transition: transform var(--transition);
}

.sidebar-header {
  padding: 20px 16px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -.5px;
}

.sidebar-logo span {
  display: block;
  font-size: .72rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0;
  margin-top: 1px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition);
  border: none;
  background: none;
  font-family: inherit;
  text-align: left;
  width: 100%;
}

.nav-item:hover { background: var(--surface-2); color: var(--text); }

.nav-item.active {
  background: var(--primary-glow);
  color: var(--primary);
}

.nav-item .nav-icon { font-size: 1.1rem; flex-shrink: 0; }

.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: .82rem;
  color: var(--text-muted);
}

.user-avatar {
  width: 30px;
  height: 30px;
  background: var(--primary-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* ─── Main content ───────────────────────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  height: 56px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 40;
}

.topbar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.topbar-actions { display: flex; gap: 8px; align-items: center; }

.content-area { padding: 24px; flex: 1; }

/* ─── Section panels ─────────────────────────────────────────────────────── */
.panel { display: none; }
.panel.active { display: block; }

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
  flex-wrap: wrap;
}

.panel-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

/* ─── Cards ──────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
}

.card-subtitle {
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* ─── Status badges ──────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .4px;
}

.badge-open     { background: var(--success-bg);  color: var(--success); }
.badge-closed   { background: var(--error-bg);    color: var(--error); }
.badge-finished { background: var(--warning-bg);  color: var(--warning); }
.badge-thesis   { background: rgba(79,127,255,.12); color: var(--primary); }
.badge-photo    { background: rgba(168,85,247,.12); color: #a855f7; }

.badge .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}

/* ─── Table ──────────────────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85rem;
}

thead th {
  background: var(--surface-2);
  color: var(--text-muted);
  font-weight: 600;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  padding: 10px 16px;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

tbody td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }

.td-mono {
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  font-size: .8rem;
  color: var(--text-muted);
}

/* ─── Results bar chart ──────────────────────────────────────────────────── */
.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.result-row {
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

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

.result-name {
  font-weight: 600;
  font-size: .9rem;
  color: var(--text);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-count {
  font-size: .82rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.result-count strong {
  color: var(--primary);
  font-weight: 700;
}

.result-bar-track {
  height: 8px;
  background: var(--surface-3);
  border-radius: 4px;
  overflow: hidden;
}

.result-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #7c3aed);
  border-radius: 4px;
  transition: width .6s cubic-bezier(.4,0,.2,1);
}

.result-bar-fill.gold   { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.result-bar-fill.silver { background: linear-gradient(90deg, #94a3b8, #cbd5e1); }
.result-bar-fill.bronze { background: linear-gradient(90deg, #92400e, #b45309); }

/* ─── QR display ─────────────────────────────────────────────────────────── */
.qr-display-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.qr-image-wrap {
  background: #fff;
  padding: 16px;
  border-radius: var(--radius);
  display: inline-block;
  box-shadow: 0 0 40px rgba(79,127,255,.2);
}

.qr-image-wrap img { display: block; max-width: 320px; width: 100%; }

.qr-token {
  font-family: 'Menlo', 'Monaco', monospace;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  background: var(--surface-2);
  padding: 8px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.qr-countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.qr-countdown-label {
  font-size: .8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
}

.qr-countdown-value {
  font-size: 2rem;
  font-weight: 900;
  color: var(--warning);
  line-height: 1;
}

.qr-progress {
  width: 200px;
  height: 6px;
  background: var(--surface-3);
  border-radius: 3px;
  overflow: hidden;
}

.qr-progress-fill {
  height: 100%;
  background: var(--warning);
  border-radius: 3px;
  transition: width 1s linear;
}

/* ─── Modal ──────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(4px);
}

.modal-backdrop.hidden { display: none; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 28px 24px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow);
  animation: modalIn .2s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(.95) translateY(8px); }
  to   { opacity: 1; transform: scale(1)  translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
  transition: color var(--transition);
}

.modal-close:hover { color: var(--text); }

.modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ─── Notifications / toasts ─────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 500;
  color: #fff;
  box-shadow: var(--shadow);
  animation: toastIn .25s ease;
  max-width: 320px;
}

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

.toast-success { background: #166534; border-left: 3px solid var(--success); }
.toast-error   { background: #7f1d1d; border-left: 3px solid var(--error); }
.toast-info    { background: #1e3a5f; border-left: 3px solid var(--primary); }

/* ─── Misc helpers ───────────────────────────────────────────────────────── */
.hidden { display: none !important; }

.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-dim);
  font-size: .9rem;
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: .5;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.stat-label {
  font-size: .72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.stat-value.primary { color: var(--primary); }
.stat-value.success { color: var(--success); }

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }

  .sidebar {
    transform: translateX(-220px);
    width: 220px;
  }

  .sidebar.open { transform: translateX(0); }

  .main-content { margin-left: 0; }

  .mobile-menu-btn {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text);
  }

  .content-area { padding: 16px; }

  .panel-header { flex-direction: column; align-items: flex-start; }
}

.mobile-menu-btn { display: none; }

/* ─── Toggle switch ──────────────────────────────────────────────────────── */
.toggle-switch { position: relative; display: inline-block; width: 44px; height: 24px; flex-shrink: 0; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0;
  background: var(--border);
  border-radius: 24px;
  transition: background 200ms;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 200ms;
}
.toggle-switch input:checked + .toggle-slider { background: var(--primary); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }