/* Dark Theme (default) */
:root, [data-theme="dark"] {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a3e;
    --bg-card: #1e1e4a;
    --text-primary: #e8e8ff;
    --text-secondary: #a0a0cc;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.12);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --border: rgba(255, 255, 255, 0.08);
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --input-bg: #0f0f23;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #4f46e5;
    --accent-hover: #6366f1;
    --success: #16a34a;
    --success-bg: rgba(22, 163, 74, 0.1);
    --danger: #dc2626;
    --danger-bg: rgba(220, 38, 38, 0.1);
    --warning: #d97706;
    --warning-bg: rgba(217, 119, 6, 0.1);
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --input-bg: #f1f5f9;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

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

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

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

.error-msg {
    margin-top: 12px;
    padding: 10px;
    background: var(--danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    color: var(--danger);
    font-size: 13px;
    text-align: center;
}

/* Header */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left h1 {
    font-size: 20px;
}

.header-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
    color: var(--text-primary);
}

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

.lang-btn {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s;
}

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

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.stat-item {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
    transition: transform 0.2s;
}

.stat-item:hover {
    transform: translateY(-2px);
}

.stat-item .stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-item .stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
}

.stat-item.online .stat-value { color: var(--success); }
.stat-item.offline .stat-value { color: var(--danger); }

/* Toolbar */
.toolbar {
    margin-bottom: 20px;
    display: flex;
    gap: 12px;
    align-items: center;
}

.toolbar .btn-primary {
    width: auto;
    padding: 10px 20px;
}

.toolbar .btn-secondary {
    padding: 10px 20px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
}

.toolbar .btn-secondary:hover {
    background: var(--accent);
    color: white;
}

/* Server Grid */
.servers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
}

.server-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.server-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.server-card.online::before {
    background: var(--success);
}

.server-card.offline::before {
    background: var(--danger);
}

.server-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.1);
}

.server-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.server-card-header .name {
    font-size: 16px;
    font-weight: 600;
}

.server-card-header .host {
    font-size: 12px;
    color: var(--text-secondary);
}

.status-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-badge.online {
    background: var(--success-bg);
    color: var(--success);
}

.status-badge.offline {
    background: var(--danger-bg);
    color: var(--danger);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse-green 2s infinite;
}

.status-dot.offline {
    background: var(--danger);
    box-shadow: 0 0 8px var(--danger);
    animation: pulse-red 2s infinite;
}

@keyframes pulse-green {
    0%, 100% { box-shadow: 0 0 4px var(--success); }
    50% { box-shadow: 0 0 12px var(--success); }
}

@keyframes pulse-red {
    0%, 100% { box-shadow: 0 0 4px var(--danger); }
    50% { box-shadow: 0 0 12px var(--danger); }
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 14px;
}

.metric-item {
    text-align: center;
}

.metric-item .label {
    font-size: 11px;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 4px;
}

.metric-item .value {
    font-size: 18px;
    font-weight: 700;
    color: var(--success);
}

.metric-item .value.warn { color: var(--warning); }
.metric-item .value.crit { color: var(--danger); }

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-primary);
    border-radius: 2px;
    margin-top: 4px;
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.3s;
}

.progress-bar .fill.ok { background: var(--success); }
.progress-bar .fill.warn { background: var(--warning); }
.progress-bar .fill.crit { background: var(--danger); }

.server-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.server-card-actions button {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.2s;
}

.server-card-actions button:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.server-card-actions button.danger:hover {
    background: var(--danger);
    border-color: var(--danger);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

.modal-content.modal-large {
    max-width: 900px;
    height: 80vh;
}

.modal-content.modal-wide {
    max-width: 700px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-header h2 {
    font-size: 18px;
}

.btn-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
}

.btn-close:hover {
    background: var(--danger);
    color: white;
}

.modal-content h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 20px 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Instructions */
.instructions-section {
    margin-bottom: 20px;
}

.instr-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
}

.instr-card h4 {
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--accent);
}

.instr-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.instr-card code {
    display: block;
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--bg-primary);
    border-radius: 6px;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 12px;
    color: var(--success);
    overflow-x: auto;
    white-space: nowrap;
}

.instr-card .cmd-list {
    list-style: none;
    margin-top: 8px;
}

.instr-card .cmd-list li {
    padding: 6px 12px;
    background: var(--bg-primary);
    border-radius: 4px;
    margin-bottom: 4px;
    font-family: monospace;
    font-size: 12px;
    color: var(--text-primary);
}

/* Terminal */
#terminal-container {
    width: 100%;
    height: calc(100% - 60px);
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 24px 16px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    opacity: 0.5;
}

.app-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.app-footer a:hover {
    color: var(--accent);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    main { padding: 16px; }
    .servers-grid { grid-template-columns: 1fr; }
    .stats-bar { flex-direction: column; gap: 8px; }
    header { padding: 12px 16px; }
    .header-right { gap: 4px; }
}