/* ── Reset & Base ────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #0f0f11;
    --surface: #1a1a1f;
    --surface-hover: #222228;
    --border: #2a2a30;
    --text: #e8e8ec;
    --text-muted: #8888a0;
    --accent: #6c5ce7;
    --accent-hover: #7d6ef0;
    --success: #2ecc71;
    --danger: #e74c3c;
    --danger-hover: #c0392b;
    --radius: 12px;
    --radius-sm: 8px;
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Cascadia Mono", monospace;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 3rem 1.5rem;
}

/* ── Layout ──────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: 560px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

header .subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

footer {
    text-align: center;
    margin-top: 2.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

footer a {
    color: var(--text-muted);
    text-decoration: underline;
    text-underline-offset: 2px;
}

footer a:hover {
    color: var(--text);
}

/* ── Card ────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.card > p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* ── Form ────────────────────────────────────────────── */
.field {
    margin-bottom: 1rem;
}

.field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.35rem;
    color: var(--text-muted);
}

.field input {
    width: 100%;
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    font-family: var(--font);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}

.field input::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.field input:focus {
    border-color: var(--accent);
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn.primary {
    width: 100%;
    margin-top: 0.5rem;
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn.primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn.secondary {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--border);
}

.btn.secondary:hover:not(:disabled) {
    color: var(--text);
    border-color: var(--text-muted);
}

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

.btn.danger:hover:not(:disabled) {
    background: var(--danger-hover);
    border-color: var(--danger-hover);
}

.btn.sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

/* ── Badge ───────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge.active {
    background: rgba(46, 204, 113, 0.15);
    color: var(--success);
}

.badge.revoked,
.badge.disabled {
    background: rgba(231, 76, 60, 0.15);
    color: var(--danger);
}

.badge.suspended {
    background: rgba(241, 196, 15, 0.15);
    color: #f1c40f;
}

/* ── License Header ──────────────────────────────────── */
.license-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
}

.license-header h2 {
    margin-bottom: 0.2rem;
}

.mono {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Info Grid ───────────────────────────────────────── */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius-sm);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.info-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
}

.info-item .value {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ── Device List ─────────────────────────────────────── */
.device-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
}

.device-info {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.device-name {
    font-size: 0.9rem;
    font-weight: 500;
}

.device-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ── Actions ─────────────────────────────────────────── */
.actions {
    margin-top: 1.5rem;
    display: flex;
    gap: 0.75rem;
}

/* ── Modal ───────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1rem;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    max-width: 400px;
    width: 100%;
}

.modal h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.modal p {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1.25rem;
}

/* ── Utilities ───────────────────────────────────────── */
.hidden {
    display: none !important;
}

.error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

.success {
    color: var(--success);
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

.muted {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ── Loading Spinner ─────────────────────────────────── */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 0.5rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 480px) {
    body {
        padding: 1.5rem 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .device-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}