/* ============================================================================
 * Cubox Auth Demo — 极简样式
 * 仅用 CSS 变量,无构建,所有元素走 :root 暴露的 token。
 * ========================================================================== */

:root {
  --bg-1: #1e1b4b;
  --bg-2: #312e81;
  --fg: #f8fafc;
  --muted: #cbd5e1;
  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --danger: #fb7185;
  --card-bg: rgba(15, 23, 42, 0.85);
  --border: rgba(148, 163, 184, 0.2);
  --code-bg: rgba(2, 6, 23, 0.6);
  --shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(at 20% 30%, var(--bg-2) 0%, transparent 50%),
    radial-gradient(at 80% 70%, var(--bg-1) 0%, transparent 50%),
    linear-gradient(135deg, #020617 0%, #0f172a 100%);
  color: var(--fg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

main.card {
  width: 100%;
  max-width: 420px;
  padding: 36px 32px 28px;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

h1 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 4px;
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 24px;
}

section[hidden] { display: none !important; }

/* ---------- 表单 ---------- */
form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

button[type="submit"],
button[type="button"] {
  margin-top: 8px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent) 0%, #818cf8 100%);
  color: var(--bg-1);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.15s;
}

button:hover {
  box-shadow: 0 8px 16px rgba(56, 189, 248, 0.3);
}

button:active { transform: scale(0.98); }

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- 分割线 ---------- */
.divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.divider span {
  padding: 0 12px;
}

/* ---------- GitHub 按钮 ---------- */
.github-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
  background: #24292f;
  color: #fff;
  border: 1px solid #444c56;
  border-radius: 10px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background 0.15s, transform 0.1s;
}

.github-btn:hover { background: #2d333b; }
.github-btn:active { transform: scale(0.98); }

.hint {
  margin-top: 20px;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
}

.hint code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.78rem;
}

/* ---------- 用户信息卡 ---------- */
.user-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 16px;
}

.user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}

.user-row .label {
  width: 64px;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.user-row code {
  flex: 1;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

/* ---------- 错误 / 提示 ---------- */
.error {
  margin-top: 20px;
  padding: 12px 16px;
  background: rgba(251, 113, 133, 0.15);
  border: 1px solid rgba(251, 113, 133, 0.3);
  border-radius: 10px;
  color: var(--danger);
  font-size: 0.85rem;
}

.api-base {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--muted);
  text-align: center;
}

.api-base code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}