* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; background: #0f1117; color: #e6e6e6; line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.main { padding: 30px 20px; min-height: calc(100vh - 200px); }

/* Nav */
.nav { background: #1a1d29; border-bottom: 1px solid #2a2e3d; padding: 16px 0; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { color: #fff; font-size: 20px; font-weight: bold; text-decoration: none; }
.nav-links { display: flex; gap: 18px; align-items: center; }
.nav-links a { color: #b8b8b8; text-decoration: none; transition: color .15s; }
.nav-links a:hover { color: #fff; }
.user { color: #888; font-size: 14px; }
.badge { background: #2563eb; color: #fff; padding: 4px 10px; border-radius: 12px; font-size: 12px; }

/* Hero */
.hero { text-align: center; padding: 60px 20px 40px; }
.hero h1 { font-size: 44px; margin-bottom: 14px; background: linear-gradient(135deg, #6366f1, #ec4899); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { color: #b8b8b8; font-size: 18px; }
.hero-cta { margin-top: 30px; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; padding: 30px 0; }
.feature { background: #1a1d29; padding: 24px; border-radius: 12px; border: 1px solid #2a2e3d; }
.feature h3 { margin-bottom: 10px; color: #fff; }

.pricing { padding: 40px 0; }
.pricing h2 { text-align: center; margin-bottom: 24px; font-size: 28px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.card { background: #1a1d29; border: 1px solid #2a2e3d; border-radius: 12px; padding: 24px; text-align: center; transition: transform .15s, border-color .15s; }
.card:hover { transform: translateY(-4px); border-color: #6366f1; }
.card.featured { border-color: #6366f1; box-shadow: 0 0 20px rgba(99, 102, 241, 0.3); }
.card h3 { margin-bottom: 10px; }
.price { font-size: 36px; font-weight: bold; color: #6366f1; margin: 8px 0; }
.card p { color: #888; margin-bottom: 16px; }

.usage { background: #1a1d29; border: 1px solid #2a2e3d; border-radius: 12px; padding: 24px; margin: 30px 0; }
.usage h2 { margin-bottom: 14px; }
.usage pre { background: #0a0c12; padding: 16px; border-radius: 8px; overflow-x: auto; }
.usage code { color: #a5d6ff; font-family: "JetBrains Mono", Consolas, monospace; font-size: 13px; }

/* Auth */
.auth-box { max-width: 400px; margin: 60px auto; background: #1a1d29; padding: 30px; border-radius: 12px; border: 1px solid #2a2e3d; }
.auth-box h2 { margin-bottom: 20px; text-align: center; }
.auth-foot { text-align: center; margin-top: 16px; color: #888; font-size: 14px; }
.auth-foot a { color: #6366f1; text-decoration: none; }

/* Form */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; color: #b8b8b8; font-size: 14px; }
input[type=text], input[type=email], input[type=password], input[type=number] {
    width: 100%; background: #0f1117; border: 1px solid #2a2e3d; color: #e6e6e6;
    padding: 10px 12px; border-radius: 6px; font-size: 14px;
}
input:focus { outline: none; border-color: #6366f1; }

/* Buttons */
.btn { display: inline-block; background: #2a2e3d; color: #fff; padding: 8px 16px; border: none; border-radius: 6px; cursor: pointer; text-decoration: none; font-size: 14px; transition: background .15s; }
.btn:hover { background: #3a3e4d; }
.btn-primary { background: #6366f1; }
.btn-primary:hover { background: #4f46e5; }
.btn-danger { background: #dc2626; }
.btn-danger:hover { background: #b91c1c; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

/* Stat cards */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin: 24px 0; }
.stat-card { background: #1a1d29; border: 1px solid #2a2e3d; border-radius: 12px; padding: 20px; text-align: center; }
.stat-label { color: #888; font-size: 13px; }
.stat-value { font-size: 28px; font-weight: bold; color: #fff; margin: 8px 0; }
.stat-unit { color: #888; font-size: 12px; }

/* Tables */
.table { width: 100%; border-collapse: collapse; background: #1a1d29; border-radius: 8px; overflow: hidden; margin: 16px 0; }
.table th, .table td { padding: 12px; text-align: left; border-bottom: 1px solid #2a2e3d; }
.table th { background: #15171f; color: #b8b8b8; font-size: 13px; font-weight: 600; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover { background: #1f2230; }
.key-cell { background: #0a0c12; padding: 4px 8px; border-radius: 4px; font-size: 12px; color: #a5d6ff; }

/* Tags */
.tag { display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 12px; }
.tag-green { background: rgba(34, 197, 94, 0.2); color: #4ade80; }
.tag-red { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.tag-yellow { background: rgba(234, 179, 8, 0.2); color: #facc15; }
.tag-gray { background: #2a2e3d; color: #888; }

/* Forms inline */
.inline-form { display: inline-flex; gap: 6px; align-items: center; margin-right: 6px; }
.form-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.form-row input { flex: 1; min-width: 120px; }

/* Sections */
section { margin: 30px 0; }
section h2 { margin-bottom: 14px; font-size: 22px; }

.order-box { background: #1a1d29; border: 1px solid #2a2e3d; border-radius: 12px; padding: 30px; }
.order-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid #2a2e3d; }
.order-row:last-child { border-bottom: none; }
.order-row .label { color: #888; }
.big-amount { font-size: 24px; color: #6366f1; font-weight: bold; }

.wallet-box { display: flex; align-items: center; gap: 8px; background: #0a0c12; padding: 14px; border-radius: 8px; margin: 14px 0; }
.wallet-box code { flex: 1; color: #facc15; font-size: 15px; word-break: break-all; }

.muted { color: #888; font-size: 13px; }
.check-row { display: flex; gap: 12px; align-items: center; margin: 20px 0; }
.success-box { background: rgba(34, 197, 94, 0.1); border: 1px solid #4ade80; padding: 14px; border-radius: 8px; color: #4ade80; margin-top: 16px; }
.success-box a { color: #4ade80; margin-left: 8px; }

/* Flash */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; }
.flash-error { background: rgba(239, 68, 68, 0.15); border: 1px solid #f87171; color: #fca5a5; }
.flash-success { background: rgba(34, 197, 94, 0.15); border: 1px solid #4ade80; color: #86efac; }
.flash-info { background: rgba(99, 102, 241, 0.15); border: 1px solid #818cf8; color: #c7d2fe; }

/* Admin sections */
.admin-section { background: #1a1d29; border: 1px solid #2a2e3d; border-radius: 12px; padding: 24px; margin: 20px 0; }
.admin-section h2 { margin-bottom: 16px; }
.admin-section h3 { margin: 16px 0 10px; color: #b8b8b8; font-size: 15px; }

/* Footer */
.footer { text-align: center; padding: 30px 20px; color: #666; font-size: 13px; border-top: 1px solid #2a2e3d; margin-top: 60px; }

/* Code */
code { font-family: "JetBrains Mono", Consolas, monospace; }