:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-hover: #334155;
    --border: #334155;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 20px 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

main { flex: 1; }

footer {
    margin-top: 40px;
    padding: 16px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border);
}

/* Cards */
.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.card-narrow {
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

/* Typography */
h1 { font-size: 24px; margin-bottom: 8px; }
h2 { font-size: 18px; margin-bottom: 12px; }
.subtitle { color: var(--text-muted); margin-bottom: 20px; }
.text-muted { color: var(--text-muted); font-size: 14px; }

.email-highlight {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin: 8px 0;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 20px 0;
}

/* Forms */
.form-group { margin-bottom: 16px; }

.input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
}

.input:focus { border-color: var(--primary); }
.input::placeholder { color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background 0.2s, transform 0.1s;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-block { width: 100%; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-outline:hover { background: var(--surface-hover); color: var(--text); }

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-danger {
    color: var(--error);
    border-color: rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Status badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-active { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge-pending { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.badge-expired { background: rgba(239, 68, 68, 0.2); color: var(--error); }
.badge-relay { background: rgba(255, 255, 255, 0.15); color: #fff; }

/* Key card */
.key-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 12px;
}

.key-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.key-uri {
    word-break: break-all;
    font-family: monospace;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--surface);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    margin: 8px 0;
    max-height: 60px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid transparent;
    transition: border-color 0.2s;
    position: relative;
}

.key-uri:hover { border-color: var(--primary); }
.key-uri.copied { border-color: var(--success); }

/* Select grid (country/device) */
.select-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 16px 0;
}

.select-option {
    display: block;
    padding: 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    text-decoration: none;
    text-align: center;
    font-size: 15px;
    transition: border-color 0.2s, background 0.2s;
}

.select-option:hover {
    border-color: var(--primary);
    background: var(--surface-hover);
}

/* Link code */
.link-code {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--primary);
    padding: 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    margin: 16px 0;
}

/* Header nav */
.header-nav {
    display: flex;
    gap: 12px;
    align-items: center;
}

.header-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
}

.header-nav a:hover { color: var(--text); }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state p { margin-bottom: 16px; }

/* Links */
a { color: var(--primary); }
a:hover { color: var(--primary-hover); }