:root {
    --bg-base: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-orange: #f59e0b;
    --accent-purple: #8b5cf6;
    
    --border-color: #334155;
    --border-radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-main);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Typography & Layout */
h1, h2, h3, h4 { color: var(--text-main); font-weight: 600; }
a { color: var(--accent-blue); text-decoration: none; }
.text-muted { color: var(--text-muted); font-size: 0.875rem; }

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
}
.header-left { display: flex; align-items: center; gap: 12px; }
.header-right { display: flex; align-items: center; gap: 16px; }
.logo-title { font-size: 1.35rem; font-weight: 700; display: flex; align-items: center; gap: 8px;}
.logo-title i { color: var(--accent-blue); }

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.badge-online { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); border: 1px solid var(--accent-green); }
.badge-offline { background: rgba(239, 68, 68, 0.1); color: var(--accent-red); border: 1px solid var(--accent-red); }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot-green { background-color: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); animation: pulse 2s infinite; }
.dot-red { background-color: var(--accent-red); box-shadow: 0 0 8px var(--accent-red); }

@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); }
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 24px;
    margin-top: 16px;
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}
.card-header {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}
.card-header h3 { margin-bottom: 4px; display: flex; align-items: center; gap: 8px; }

/* Forms & Inputs - 16px prevents iOS Safari automatic zoom */
.form-group { margin-bottom: 16px; }
.form-label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 0.9rem; }
.form-control {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 16px;
    min-height: 44px;
    transition: border-color 0.2s;
    -webkit-appearance: none;
}
.form-control:focus { outline: none; border-color: var(--accent-blue); }

.ip-display-box {
    background: #000;
    padding: 14px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-family: monospace;
    font-size: 1.25rem;
    text-align: center;
    color: var(--accent-green);
    margin-bottom: 16px;
    letter-spacing: 1px;
    word-break: break-all;
}

/* Buttons - Touch Friendly (min 44px height) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 18px;
    min-height: 44px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    width: 100%;
    touch-action: manipulation;
    text-decoration: none;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent-blue); color: white; }
.btn-primary:hover { background: var(--accent-blue-hover); }
.btn-success { background: var(--accent-green); color: white; }
.btn-success:hover { background: #059669; }
.btn-danger { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); border: 1px solid var(--accent-red); }
.btn-danger:hover { background: var(--accent-red); color: white; }
.btn-sm { padding: 8px 14px; font-size: 0.85rem; min-height: 36px; width: auto; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border-color); }
th { color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
.code-cell { font-family: monospace; color: var(--accent-blue); background: rgba(0,0,0,0.3); padding: 4px 8px; border-radius: 4px; word-break: break-all;}

/* Countdown Timer */
.countdown { font-family: monospace; font-size: 1.05rem; color: var(--accent-orange); font-weight: bold; white-space: nowrap;}

/* VHost Toggle */
.vhost-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 8px;
    gap: 12px;
}
.vhost-info strong { display: block; font-size: 0.95rem; word-break: break-all; }
.vhost-info span { font-size: 0.75rem; color: var(--text-muted); font-family: monospace; word-break: break-all; }

/* Login Container */
.login-container {
    max-width: 420px;
    width: 100%;
    margin: 60px auto 30px auto;
    padding: 0 16px;
}
.error-msg { background: rgba(239, 68, 68, 0.2); color: #fca5a5; padding: 12px; border-radius: 6px; margin-bottom: 16px; border: 1px solid var(--accent-red); text-align: center; font-size: 0.9rem; }

/* =========================================================================
   Responsive Mobile Optimization (Tablets & Phones)
   ========================================================================= */

@media (max-width: 1024px) {
    .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .container {
        padding: 12px;
    }
    .app-header {
        padding: 12px 16px;
    }
    .logo-title {
        font-size: 1.2rem;
    }
    .card {
        padding: 16px;
        margin-bottom: 16px;
    }
    .vhost-item {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .vhost-item .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .login-container {
        margin: 20px auto;
        padding: 0 10px;
    }
    .app-header {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .header-left {
        justify-content: space-between;
    }
    .header-right {
        justify-content: space-between;
        padding-top: 8px;
        border-top: 1px solid rgba(255,255,255,0.05);
    }
    .ip-display-box {
        font-size: 1.1rem;
        padding: 10px;
    }
    th, td {
        padding: 8px 6px;
        font-size: 0.85rem;
    }
}