/* dashboard.css — K-Viewer 대시보드 */

:root {
    --bg-primary: #0a0a0f;
    --bg-glass: rgba(20, 20, 35, 0.85);
    --bg-glass-hover: rgba(30, 30, 50, 0.9);
    --border-glass: rgba(255, 255, 255, 0.08);
    --accent: #4a9eff;
    --accent-hover: #6ab4ff;
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --danger: #ff4a6a;
    --success: #4aff8a;
    --warning: #ffaa4a;
    --radius: 12px;
    --radius-sm: 8px;
}

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

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

/* ── State-based visibility ─────────────────────── */
.login-screen,
.dashboard-screen { display: none; }

body.state-login .login-screen { display: flex; }
body.state-dashboard .dashboard-screen { display: block; }

/* ── Login Screen ───────────────────────────────── */
.login-screen {
    position: absolute;
    inset: 0;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at 50% 30%, rgba(74, 158, 255, 0.08) 0%, transparent 60%),
                var(--bg-primary);
}

.login-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 40px;
    width: 380px;
    max-width: 90vw;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.login-card h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.login-card .subtitle {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: center;
    margin-bottom: 28px;
}

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

.form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

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

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.btn-primary {
    width: 100%;
    background: var(--accent);
    margin-top: 8px;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

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

.status-message {
    margin-top: 16px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    text-align: center;
    display: none;
}

.status-message.visible {
    display: block;
}

.status-message.error {
    background: rgba(255, 74, 106, 0.12);
    color: var(--danger);
    border: 1px solid rgba(255, 74, 106, 0.2);
}

.direct-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 0.82rem;
    text-decoration: none;
    transition: color 0.2s;
}

.direct-link:hover {
    color: var(--accent);
}

/* ── Dashboard Header ───────────────────────────── */
.dashboard-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-left .logo {
    font-size: 1.1rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-email {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.btn-logout {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    padding: 6px 14px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-logout:hover {
    background: rgba(255, 74, 106, 0.15);
    color: var(--danger);
    border-color: rgba(255, 74, 106, 0.3);
}

/* ── Dashboard Content ──────────────────────────── */
.dashboard-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.btn-refresh {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    padding: 6px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-refresh:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.btn-refresh.spinning .refresh-icon {
    animation: spin 0.8s linear infinite;
}

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

/* ── Device Grid ────────────────────────────────── */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.device-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 20px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.device-card:hover {
    background: var(--bg-glass-hover);
    border-color: rgba(74, 158, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.device-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.device-card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 500;
}

.status-badge.online {
    background: rgba(74, 255, 138, 0.1);
    color: var(--success);
}

.status-badge.offline {
    background: rgba(136, 136, 160, 0.1);
    color: var(--text-secondary);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-badge.online .status-dot {
    background: var(--success);
    box-shadow: 0 0 6px var(--success);
    animation: pulse 2s ease-in-out infinite;
}

.status-badge.offline .status-dot {
    background: var(--text-secondary);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.device-host-id {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    letter-spacing: 1px;
}

.device-group {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.device-last-seen {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.btn-connect {
    width: 100%;
    padding: 8px 16px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-connect:hover {
    background: var(--accent-hover);
}

.btn-connect:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ── Empty State ────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ── Loading Spinner ────────────────────────────── */
.loading-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner.sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

/* ── Device Card Actions ────────────────────────── */
.device-card-actions {
    display: flex;
    gap: 8px;
}

.device-card-actions .btn-connect {
    flex: 1;
}

.btn-invite {
    flex: 0 0 auto;
    padding: 8px 14px;
    background: rgba(74, 158, 255, 0.12);
    border: 1px solid rgba(74, 158, 255, 0.25);
    border-radius: var(--radius-sm);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-invite:hover {
    background: rgba(74, 158, 255, 0.22);
    border-color: rgba(74, 158, 255, 0.45);
}

/* ── Modal ──────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 0;
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-host-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    padding: 8px 12px;
    background: rgba(74, 158, 255, 0.08);
    border: 1px solid rgba(74, 158, 255, 0.15);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
}

.modal-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: -4px;
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.radio-group label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.radio-group label:has(input:checked) {
    background: rgba(74, 158, 255, 0.12);
    border-color: rgba(74, 158, 255, 0.35);
    color: var(--accent);
}

.radio-group input[type="radio"] {
    accent-color: var(--accent);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.checkbox-group label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.checkbox-group label:hover {
    color: var(--text-primary);
}

.checkbox-group input[type="checkbox"] {
    accent-color: var(--accent);
    width: 15px;
    height: 15px;
    cursor: pointer;
}

.btn-modal-primary {
    width: 100%;
    padding: 10px 16px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 4px;
}

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

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

.btn-modal-secondary {
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-modal-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
}

.btn-modal-danger {
    width: 100%;
    padding: 8px 16px;
    background: rgba(255, 74, 106, 0.1);
    border: 1px solid rgba(255, 74, 106, 0.25);
    border-radius: var(--radius-sm);
    color: var(--danger);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-modal-danger:hover:not(:disabled) {
    background: rgba(255, 74, 106, 0.2);
    border-color: rgba(255, 74, 106, 0.4);
}

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

.invite-url-box {
    display: flex;
    gap: 8px;
    align-items: center;
}

.invite-url-box input[type="text"] {
    flex: 1;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.82rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    outline: none;
    min-width: 0;
}

.invite-url-box input[type="text"]:focus {
    border-color: var(--accent);
}

.invite-hint {
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-align: center;
}

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 640px) {
    .dashboard-header {
        padding: 10px 16px;
    }

    .header-left .logo {
        font-size: 0.95rem;
    }

    .user-email {
        display: none;
    }

    .dashboard-content {
        padding: 20px 16px;
    }

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

    .section-header h2 {
        font-size: 1rem;
    }
}