/* ============================================================
   Tokens
   ============================================================ */
:root {
  --bg: #0d1117;
  --bg-panel: #12161f;
  --line: #26303f;
  --text: #d7dee8;
  --text-dim: #8996a8;
  --accent: #ffb627;      /* signal amber */
  --accent-dim: #7a5f1c;
  --ok: #3ddc97;
  --err: #ff5d5d;
  --font-display: 'Chakra Petch', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --radius: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
}

body {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
  background-color: var(--bg);
}

a { color: var(--accent); }

/* ============================================================
   Layout shell
   ============================================================ */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 48px 20px 80px;
}

.brand {
  width: 100%;
  max-width: 720px;
  margin-bottom: 28px;
}

.brand h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(28px, 5vw, 40px);
  margin: 0 0 8px;
  color: #fff;
  letter-spacing: 0.01em;
}

.brand p {
  color: var(--text-dim);
  margin: 0;
  max-width: 56ch;
  line-height: 1.5;
}

/* ============================================================
   Panel / card
   ============================================================ */
.panel {
  width: 100%;
  max-width: 720px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 24px;
  gap: 12px;
  flex-wrap: wrap;
}

.panel-head h2 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0;
  color: #fff;
}

.panel-head .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
}

/* ============================================================
   Form elements
   ============================================================ */
.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.field label .req { color: var(--accent); }

.field input,
.field select {
  width: 100%;
  background: #0a0d13;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 14px;
  font-size: 15px;
  font-family: var(--font-body);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input::placeholder { color: #4b5567; }

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 182, 39, 0.15);
}

.field .hint {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 6px;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2,1fr);
}

@media (max-width: 560px) {
  .two-col { grid-template-columns: 1fr; }
}

#members-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 4px;
}

.member-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.member-row .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  width: 28px;
  flex-shrink: 0;
  text-align: right;
}

.member-row input { flex: 1; }

.member-card .member-row { margin-bottom: 10px; }

.member-sub {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 10px;
}

.member-sub:last-child { margin-bottom: 0; }

.member-row input,
.member-sub input,
.member-sub select {
  width: 100%;
  background: #0a0d13;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 14px; /* Same as leader inputs */
  font-size: 15px;    /* Same as leader inputs */
  font-family: var(--font-body);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.member-row input:focus,
.member-sub input:focus,
.member-sub select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 182, 39, 0.15);
}

@media (max-width: 560px) {
  .member-sub { grid-template-columns: 1fr; }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius);
  border: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #17130a;
}
.btn-primary:hover { background: #ffc457; }
.btn-primary:active { transform: scale(0.99); }
.btn-primary:disabled {
  background: var(--accent-dim);
  color: #a68a4e;
  cursor: not-allowed;
}

.btn-ghost {
  background: var(--accent);
  border: 1px solid var(--line);
  color: black;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.foot-link {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
  display: none;
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 13px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  border: 1px solid transparent;
}

.alert.show { display: block; }

.alert-err {
  background: rgba(255, 93, 93, 0.08);
  border-color: rgba(255, 93, 93, 0.3);
  color: var(--err);
}

.alert-ok {
  background: rgba(61, 220, 151, 0.08);
  border-color: rgba(61, 220, 151, 0.3);
  color: var(--ok);
}

/* ============================================================
   Dashboard: team badge
   ============================================================ */
.badge {
  border: 1px dashed var(--accent-dim);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  position: relative;
}

.badge .badge-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 6px;
}

.badge h2 {
  font-family: var(--font-display);
  font-size: 26px;
  margin: 0 0 4px;
  color: #fff;
}

.badge .leader {
  color: var(--text-dim);
  font-size: 14px;
}

.roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.roster li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #0a0d13;
  padding: 14px 16px;
}

.roster li .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  width: 20px;
}

.roster li .member-details {
  font-size: 13px;
  line-height: 1.5;
  word-break: break-word;
}

.roster li .role {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 3px 8px;
  border-radius: 4px;
}

.skeleton {
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 13px;
}

/* ============================================================
   Admin dashboard
   ============================================================ */
.admin-toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.admin-toolbar input[type="search"] {
  flex: 1;
  min-width: 180px;
  background: #0a0d13;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 14px;
}

.admin-toolbar input[type="search"]:focus {
  outline: none;
  border-color: var(--accent);
}

.admin-toolbar .btn {
  width: auto;
  white-space: nowrap;
}

.team-accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.team-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0a0d13;
  overflow: hidden;
}

.team-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  cursor: pointer;
  user-select: none;
}

.team-card-head:hover { background: rgba(255, 182, 39, 0.04); }

.team-card-head .tname {
  font-family: var(--font-display);
  font-size: 16px;
  color: #fff;
  margin: 0;
}

.team-card-head .tmeta {
  color: var(--text-dim);
  font-size: 12px;
  font-family: var(--font-mono);
}

.team-card-head .chev {
  margin-left: auto;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  transition: transform 0.15s ease;
}

.team-card.open .chev { transform: rotate(180deg); }

.team-card-body {
  display: none;
  padding: 0 16px 18px;
  border-top: 1px solid var(--line);
}

.team-card.open .team-card-body { display: block; }

.team-card-body .badge {
  margin: 16px 0;
  padding: 16px;
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 16px;
}

.stat-row .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 4px 9px;
}

.admin-summary {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.topbar {
  width: 100%;
  max-width: 720px;
  display: flex;
  justify-content: flex-end;
}

/* ============================================================
   Admin dashboard: card actions
   ============================================================ */
.card-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex-shrink: 0;
}

.btn-icon {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 10px;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.btn-icon:hover { border-color: var(--accent); color: var(--accent); }

.btn-delete:hover { border-color: var(--err); color: var(--err); }

/* ============================================================
   Modal
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 11, 0.75);
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

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

.modal {
  width: 100%;
  max-width: 640px;
  max-height: 88vh;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}

.modal-head h2 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0;
  color: #fff;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

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

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-foot {
  display: flex;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--line);
  flex-shrink: 0;
}

.modal-foot .btn { width: auto; flex: 1; }

.member-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: #0a0d13;
}

/* ============================================================
   Problem statement selection page
   ============================================================ */
.ps-count-toggle {
  display: flex;
  gap: 10px;
}

.ps-radio {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: #0a0d13;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dim);
  transition: border-color 0.15s ease, color 0.15s ease;
  text-transform: none;
  margin-bottom: 0;
}

.ps-radio:has(input:checked) {
  border-color: var(--accent);
  color: #fff;
}

.ps-radio input {
  accent-color: var(--accent);
  width: auto;
}

.ps-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 4px;
  margin-bottom: 20px;
  background: #0a0d13;
}

.ps-subhead {
  margin-bottom: 16px;
}

.ps-subhead h2 {
  font-size: 15px;
}

.field input[type="file"] {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.field input[type="file"]::file-selector-button {
  background: var(--accent);
  color: #16130a;
  border: none;
  border-radius: 4px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  margin-right: 12px;
  cursor: pointer;
}

/* ============================================================
   Admin panel — problem statement PDFs
   ============================================================ */
.ps-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 10px;
  background: #0a0d13;
}

.ps-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.ps-line {
  font-size: 13px;
  color: var(--text);
}

.ps-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ps-filename {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ps-pdf-frame {
  margin-top: 12px;
}

.ps-pdf-embed {
  width: 100%;
  height: 480px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.ps-download-link {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
}

.ps-download-link:hover {
  text-decoration: underline;
}