:root {
    --bg-main: #0a0d14;
    --bg-card: #121722;
    --bg-card-hover: #171d2b;
    --border-color: #232c3d;
    --border-focus: #3b82f6;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: "JetBrains Mono", Menlo, Monaco, Consolas, "Courier New", monospace;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* Modals */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(6, 9, 15, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

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

.logo-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.modal-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
}

.modal-header p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: #0b0f19;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="password"]:focus {
    border-color: var(--border-focus);
}

.error-msg {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 0.8rem;
    text-align: center;
    min-height: 1.2rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.2rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

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

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

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

.btn-outline:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

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

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-card);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.brand-icon {
    font-size: 1.4rem;
}

.brand-title {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.tag {
    font-size: 0.65rem;
    font-weight: 600;
    background-color: #1e293b;
    color: #94a3b8;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Badges */
.badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.badge-online {
    background-color: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-offline {
    background-color: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Content */
.content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 2rem;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
}

.content-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.2rem;
}

.stats-counter {
    display: flex;
    gap: 1.5rem;
}

.stat-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1.4rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Device Grid */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}

.device-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s, border-color 0.2s;
}

.device-card:hover {
    border-color: #334155;
    background: var(--bg-card-hover);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.2rem;
}

.device-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
}

.device-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.device-info-list {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
}

.info-label {
    color: var(--text-muted);
}

.info-val {
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.card-actions {
    border-top: 1px solid #1e293b;
    padding-top: 1rem;
    display: flex;
    justify-content: flex-end;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 5rem 2rem;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.empty-state h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 450px;
    margin: 0 auto;
}

/* Terminal Modal Window */
.terminal-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    z-index: 1000;
}

.terminal-window {
    width: 100%;
    max-width: 1050px;
    height: 80vh;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
}

.terminal-header {
    background: #161b22;
    padding: 0.8rem 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #30363d;
}

.terminal-title {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.term-tag {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: #21262d;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.terminal-actions {
    display: flex;
    gap: 0.6rem;
}

.terminal-body {
    flex: 1;
    padding: 0.8rem;
    background: #0d1117;
    overflow: hidden;
}

.xterm {
    height: 100%;
}