:root {
    --bg-base: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-elevated: #334155;
    --bg-surface-input: #090d16;
    
    --border-color: #334155;
    --border-focus: #3b82f6;
    --border-subtle: #1e293b;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-glow: rgba(59, 130, 246, 0.25);
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --danger-hover: #dc2626;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

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

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

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Typography & Utilities */
.font-mono {
    font-family: var(--font-mono);
}

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

.text-highlight {
    color: #60a5fa;
}

.text-right {
    text-align: right;
}

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

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Navbar */
.navbar {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 0.875rem 0;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.025em;
}

.brand-icon {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.35rem 0.75rem;
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* Flash Messages */
.flash-messages {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.alert-success {
    background-color: var(--success-bg);
    border-color: rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

.alert-danger {
    background-color: var(--danger-bg);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-warning {
    background-color: var(--warning-bg);
    border-color: rgba(245, 158, 11, 0.3);
    color: #fde68a;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

.alert-icon {
    font-weight: bold;
    font-size: 1rem;
}

.alert-text {
    flex: 1;
}

.alert-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.15s;
}

.alert-close:hover {
    opacity: 1;
}

/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.card-header {
    margin-bottom: 1.25rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-subtitle {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Top Status Banner */
.status-card {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    background: linear-gradient(145deg, #1e293b 0%, #152033 100%);
    border-color: #334155;
    padding: 1.25rem 1.5rem;
}

.status-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2rem;
}

.status-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.status-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.status-value {
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-subtext {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-secondary);
}

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

.status-active {
    background-color: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.status-error {
    background-color: var(--danger);
    box-shadow: 0 0 8px var(--danger);
}

.status-idle {
    background-color: var(--warning);
}

/* Detected IP Banner */
.detected-ip-card {
    background-color: rgba(59, 130, 246, 0.08);
    border: 1px dashed rgba(59, 130, 246, 0.35);
    border-radius: var(--radius-md);
    padding: 0.875rem 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.detected-info {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Form Styles */
.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.flex-1 {
    flex: 1;
    min-width: 160px;
}

.flex-2 {
    flex: 2;
    min-width: 220px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.required {
    color: var(--danger);
}

.input-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 0.875rem;
    color: var(--text-muted);
    pointer-events: none;
}

.form-control {
    width: 100%;
    padding: 0.6875rem 0.875rem 0.6875rem 2.375rem;
    background-color: var(--bg-surface-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    transition: all 0.15s ease-in-out;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
}

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

.form-actions {
    display: flex;
    justify-content: flex-end;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6875rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    text-decoration: none;
    line-height: 1.25;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
}

.btn-outline-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.btn-outline-sm:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-elevated);
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 8px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background-color: var(--bg-surface-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-danger {
    background-color: var(--danger-bg);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.25);
}

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

.btn-outline-highlight {
    background: transparent;
    border: 1px solid #60a5fa;
    color: #60a5fa;
}

.btn-outline-highlight:hover {
    background-color: rgba(59, 130, 246, 0.15);
}

.btn-block {
    width: 100%;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    text-align: left;
}

.data-table th {
    padding: 0.75rem 1rem;
    background-color: rgba(15, 23, 42, 0.5);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.ip-cell {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.ip-address {
    font-weight: 600;
    color: #93c5fd;
}

.btn-copy {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: color 0.15s;
}

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

.network-label {
    font-weight: 500;
    color: var(--text-primary);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.badge-primary {
    background-color: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-secondary {
    background-color: var(--bg-surface-elevated);
    color: var(--text-secondary);
}

.badge-duration {
    background-color: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
    border: 1px solid rgba(148, 163, 184, 0.25);
}

.badge-counter {
    background-color: var(--primary);
    color: #ffffff;
    border-radius: var(--radius-full);
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

.badge-auth-by {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.6875rem;
}

.badge-warning {
    background-color: var(--warning-bg);
    color: #fde68a;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Countdown Badge */
.countdown-badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    background-color: rgba(16, 185, 129, 0.12);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.25);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.countdown-expiring-soon {
    background-color: var(--danger-bg);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-icon {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    max-width: 480px;
    margin: 0 auto;
}

/* Collapsible History Section */
.history-details {
    cursor: pointer;
}

.history-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    user-select: none;
}

.history-summary::-webkit-details-marker {
    display: none;
}

.summary-left {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.summary-arrow {
    color: var(--text-muted);
    transition: transform 0.2s ease-in-out;
}

.history-details[open] .summary-arrow {
    transform: rotate(90deg);
}

.history-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.history-content {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}

/* Auth / Login Page */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 220px);
}

.auth-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

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

.auth-icon-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.25);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem auto;
}

.auth-title {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 0.375rem;
}

.auth-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.input-password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-password-wrapper .form-control {
    padding-left: 1rem;
    padding-right: 2.75rem;
}

.btn-toggle-pwd {
    position: absolute;
    right: 0.75rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
}

.btn-toggle-pwd:hover {
    color: var(--text-primary);
}

/* Footer */
.footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 1.25rem 0;
    margin-top: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
}

.toast {
    background-color: #1e293b;
    color: #f8fafc;
    border: 1px solid #3b82f6;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Mobile Rules */
@media (max-width: 768px) {
    .main-content {
        padding: 1.25rem 0;
    }
    
    .status-card {
        flex-direction: column;
        align-items: stretch;
    }
    
    .status-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 1rem;
    }
    
    .flex-1, .flex-2 {
        width: 100%;
        min-width: 100%;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}