:root {
  --bg: #121512;
  --surface: #1c211c;
  --surface-2: #262c26;
  --text: #f2f4f1;
  --muted: #9aa39a;
  --accent: #70db97;
  --accent-hover: #5fcf88;
  --accent-dim: rgba(112, 219, 151, 0.14);
  --danger: #f87171;
  --border: rgba(255, 255, 255, 0.09);
  --radius: 14px;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { font-size: 15px; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.45;
}
a { color: var(--accent); }

.hidden { display: none !important; }
.muted { color: var(--muted); }
.center { text-align: center; }

/* —— Login —— */
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(112, 219, 151, 0.08), transparent 50%),
    var(--bg);
}
.auth-card {
  width: min(380px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  display: grid;
  gap: 10px;
  box-shadow: var(--shadow);
}
.auth-card h1 { margin: 0; font-size: 1.35rem; letter-spacing: -0.02em; }
.auth-card label { font-size: 0.82rem; color: var(--muted); font-weight: 600; }
.auth-card input {
  width: 100%;
  padding: 11px 14px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
.auth-card input:focus {
  outline: none;
  border-color: rgba(112, 219, 151, 0.55);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* —— Buttons —— */
.btn {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 11px;
  padding: 9px 14px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.btn:hover { background: #303830; }
.btn:active { transform: scale(0.98); }
.btn.primary {
  background: var(--accent);
  color: #0c1510;
  border-color: var(--accent);
}
.btn.primary:hover { background: var(--accent-hover); }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 10px; font-size: 0.8rem; }
.btn.danger {
  border-color: rgba(248, 113, 113, 0.45);
  color: var(--danger);
  background: rgba(248, 113, 113, 0.08);
}
.btn.danger:hover { background: rgba(248, 113, 113, 0.16); }

.error { color: var(--danger); margin: 0; }
.msg { margin: 0.5rem 0 0; color: var(--accent); font-size: 0.9rem; }
.msg.error { color: var(--danger); }

/* —— Top bar + tabs —— */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar strong { font-size: 0.95rem; }
.topbar-actions { display: flex; gap: 6px; flex-wrap: wrap; }

.tabs {
  display: flex;
  gap: 4px;
  padding: 10px 12px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.15);
  -webkit-overflow-scrolling: touch;
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 600;
  font-size: 0.82rem;
}
.tab:hover { color: var(--text); background: rgba(255, 255, 255, 0.04); }
.tab.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: rgba(112, 219, 151, 0.35);
}

/* —— Panel —— */
.panel {
  padding: 18px 16px 40px;
  max-width: 920px;
  margin: 0 auto;
}
.panel h2 {
  margin: 0 0 14px;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.panel h3 {
  margin: 1.1rem 0 0.6rem;
  font-size: 1rem;
  color: var(--text);
}

/* —— Cards —— */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 14px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
}

/* —— Forms: both grid-form (HTML) and form-grid (legacy) —— */
.grid-form,
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 640px) {
  .grid-form,
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }
  /* full-width rows */
  .grid-form > .form-actions,
  .form-grid > .form-actions,
  .grid-form > .msg,
  .form-grid > .msg,
  .grid-form > .span-2,
  .form-grid > .span-2 {
    grid-column: 1 / -1;
  }
}

/* Label above input inside wrappers */
.grid-form > div,
.form-grid > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.grid-form label,
.form-grid label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.grid-form input,
.grid-form select,
.grid-form textarea,
.form-grid input,
.form-grid select,
.form-grid textarea,
.card input:not([type="checkbox"]):not([type="radio"]),
.card select,
.card textarea {
  width: 100%;
  padding: 11px 13px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.grid-form input:focus,
.grid-form select:focus,
.grid-form textarea:focus,
.form-grid input:focus,
.form-grid select:focus,
.form-grid textarea:focus,
.card input:focus,
.card select:focus,
.card textarea:focus {
  outline: none;
  border-color: rgba(112, 219, 151, 0.5);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.grid-form input::placeholder,
.form-grid input::placeholder {
  color: rgba(154, 163, 154, 0.65);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 4px;
}

/* Checkbox rows */
.card label:has(input[type="checkbox"]),
.grid-form label:has(input[type="checkbox"]) {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-weight: 500;
  cursor: pointer;
}

/* New ID box */
#newIdBox {
  border-color: rgba(112, 219, 151, 0.35);
  background: linear-gradient(180deg, rgba(112, 219, 151, 0.08), var(--surface));
}
#newIdBox code {
  display: block;
  padding: 10px 12px;
  background: var(--bg);
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-top: 6px;
  font-size: 0.95rem;
  color: var(--accent);
}

/* —— Olympiad form (not always grid-form children) —— */
#olympiadForm.card {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
#olympiadForm .grid-form {
  margin-bottom: 0;
}
#olympiadForm > label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-top: 8px;
}
#olympiadForm > input,
#olympiadForm > select {
  width: 100%;
  padding: 11px 13px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  margin-bottom: 4px;
}

/* Question builder */
.question-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 10px;
  background: var(--bg);
  display: grid;
  gap: 8px;
}
.question-card .q-text {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.option-row {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 8px;
  align-items: center;
}
.option-row input[type="text"],
.option-row .opt-text {
  width: 100%;
  padding: 8px 10px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

/* —— Stats —— */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  min-width: 0;
}
.stat b,
.stat .num {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.stat span,
.stat .lbl {
  color: var(--muted);
  font-size: 0.8rem;
}

/* —— Tables —— */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  -webkit-overflow-scrolling: touch;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
th {
  color: var(--muted);
  font-weight: 600;
  background: rgba(0, 0, 0, 0.2);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
tbody tr:hover { background: rgba(112, 219, 151, 0.04); }
tbody tr:last-child td { border-bottom: none; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
  word-break: break-all;
}

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
}
.badge.fail {
  background: rgba(248, 113, 113, 0.15);
  color: var(--danger);
}
.badge.off {
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
}

.row-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.cards { display: grid; gap: 10px; }
.oly-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: grid;
  gap: 6px;
}
.oly-card h3 { margin: 0; }

@media (max-width: 700px) {
  html { font-size: 14px; }
  .panel { padding: 12px 10px 32px; }
  .card { padding: 14px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .topbar {
    flex-wrap: wrap;
    padding: 10px 12px;
    gap: 8px;
  }
  .topbar-actions {
    width: 100%;
    justify-content: flex-end;
  }
  .tabs {
    padding: 8px;
    gap: 6px;
  }
  .tab {
    min-height: 40px;
    padding: 8px 14px;
    font-size: 0.85rem;
  }
  th, td { padding: 8px 10px; }

  /* Horizontal scroll for wide tables — do not break layout */
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -4px;
    padding-bottom: 4px;
  }
  table {
    min-width: 520px;
  }

  .btn {
    min-height: 44px;
    padding: 10px 14px;
  }
  .btn.small {
    min-height: 36px;
    padding: 6px 12px;
  }

  .grid-form input,
  .grid-form select,
  .grid-form textarea,
  .form-grid input,
  .form-grid select,
  .form-grid textarea {
    min-height: 44px;
    font-size: 16px; /* prevent iOS input zoom */
  }

  .auth-card {
    padding: 18px 16px;
  }
  .auth-card input {
    min-height: 44px;
  }
  .auth-card .btn {
    min-height: 48px;
  }

  .oly-card {
    padding: 14px 12px;
  }
  .row-between {
    flex-direction: column;
    align-items: stretch;
  }
  .row-between .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .panel h2 {
    font-size: 1.1rem;
  }
  .tabs {
    padding: 6px 8px;
  }
}