/* 點數兌換站 - 現代化樣式 */
:root {
  --bg-dark: #0f0f14;
  --bg-card: #1a1a24;
  --bg-card-hover: #22222e;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --success: #22c55e;
  --error: #ef4444;
  --border: #27272a;
  --radius: 12px;
  --radius-sm: 8px;
  --font-sans: 'DM Sans', 'Segoe UI', system-ui, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(99, 102, 241, 0.08), transparent);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-hover);
}

.container {
  max-width: 420px;
  margin: 0 auto;
  padding: 24px;
}

.container-wide {
  max-width: 560px;
  margin: 0 auto;
  padding: 24px;
}

.page-header {
  text-align: center;
  margin-bottom: 32px;
}
.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.page-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.form-group input {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn:hover {
  background: var(--accent-hover);
}
.btn:active {
  transform: scale(0.98);
}
.btn-secondary {
  background: var(--border);
  color: var(--text);
  margin-top: 10px;
}
.btn-secondary:hover {
  background: #3f3f46;
  color: #fff;
}

.alert {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.alert-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #4ade80;
}
.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.links {
  text-align: center;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.links a {
  margin: 0 6px;
}

/* 儀表板 - 點數展示 */
.dashboard-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.dashboard-nav .user {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.dashboard-nav .user strong {
  color: var(--text);
}
.dashboard-nav a.btn {
  width: auto;
  padding: 8px 16px;
  font-size: 0.9rem;
}

.points-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, #252532 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.points-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
}
.points-card .label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.points-card .value {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.points-card .unit {
  font-size: 1rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.actions-grid {
  display: grid;
  gap: 12px;
}
.actions-grid .btn {
  width: 100%;
}

/* 布局 */
.site-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.site-header .logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
}
.site-header nav a {
  margin-left: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.site-header nav a:hover {
  color: var(--accent);
}

.main-wrap {
  min-height: calc(100vh - 70px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px 0;
}

@media (max-width: 480px) {
  .container, .container-wide {
    padding: 16px;
  }
  .points-card .value {
    font-size: 2.5rem;
  }
}