:root {
  --bg: #f3f6f4;
  --ink: #14201f;
  --muted: #5a6b69;
  --brand: #0f3d3e;
  --accent: #c45c26;
  --ok: #1f7a4d;
  --warn: #a15c12;
  --line: #c9d5d1;
  --card: #ffffff;
  --shadow: 0 10px 30px rgba(20, 32, 31, 0.08);
  --radius: 18px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
  --font: "Iowan Old Style", Palatino, Georgia, serif;
  --ui: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 10% -10%, #dbe8e3 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #f0e6dc 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: var(--ui);
  -webkit-tap-highlight-color: transparent;
}
button, input { font: inherit; }
button {
  border: 0;
  cursor: pointer;
  background: none;
  color: inherit;
}
a { color: var(--brand); }

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: calc(16px + var(--safe-t)) 16px calc(40px + var(--safe-b));
}

.brand {
  font-family: var(--font);
  font-size: 1.6rem;
  color: var(--brand);
  font-weight: 700;
  margin: 0 0 4px;
}
.sub {
  color: var(--muted);
  margin: 0 0 20px;
  font-size: 0.92rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 16px;
  margin-bottom: 14px;
}

.card h2 {
  font-family: var(--font);
  margin: 0 0 12px;
  font-size: 1.2rem;
  color: var(--brand);
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin: 10px 0 6px;
}
input[type=text],
input[type=email],
input[type=password],
input[type=file] {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}
.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.btn {
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 650;
  font-size: 0.92rem;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-ok { background: var(--ok); color: #fff; }
.btn-ghost {
  background: #fff;
  border: 1px solid var(--line);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 12px;
}
.tab {
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 650;
}
.tab.active {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.msg {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.88rem;
}
.msg.err { background: #fdecea; color: #8a1f11; }
.msg.ok { background: #e8f6ee; color: #145c35; }
.msg.info { background: #eef3f2; color: var(--muted); }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.userchip {
  font-size: 0.85rem;
  color: var(--muted);
}

.exam-list { display: grid; gap: 10px; }
.exam-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  background: #fbfcfb;
}
.exam-item h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-family: var(--font);
  color: var(--brand);
}
.meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.4;
}
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-right: 6px;
}
.badge.ready { background: rgba(31,122,77,.15); color: var(--ok); }
.badge.processing { background: rgba(161,92,18,.15); color: var(--warn); }
.badge.error { background: #fdecea; color: #8a1f11; }
.badge.key { background: rgba(15,61,62,.12); color: var(--brand); }
.key-panel {
  margin-top: 10px;
  padding: 12px;
  border-radius: 12px;
  border: 1px dashed var(--line);
  background: #fff;
}
.key-panel textarea {
  width: 100%;
  min-height: 90px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  font: inherit;
  resize: vertical;
}
.key-panel .hint {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0 0 8px;
}
.code {
  font-family: ui-monospace, monospace;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--muted);
}
.check input { width: auto; }

.hidden { display: none !important; }