/* CSS Variables */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1a1a25;
    --border-color: #2a2a3a;
    --border-color-light: #3a3a4a;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    
    --accent-primary: #6366f1;
    --accent-primary-hover: #818cf8;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #3b82f6;
    
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.status-bar {
    display: flex;
    gap: 20px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

a.status-item {
    color: var(--accent-primary);
    text-decoration: none;
}

a.status-item:hover {
    color: var(--accent-primary-hover);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: pulse 2s infinite;
}

.status-dot.online {
    background: var(--accent-success);
}

.status-dot.offline {
    background: var(--accent-danger);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 20px;
}

/* User Card */
.user-card {
    background: linear-gradient(135deg, var(--bg-card), var(--bg-secondary));
}

.user-info {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item .value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* Team Members */
.team-members-list .value {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.team-member {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.team-member.current-user {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* Spawned By Label */
.spawned-by {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    margin-left: 8px;
}

/* Auth Card */
.auth-card {
    max-width: 500px;
    margin: 40px auto;
}

.auth-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.9rem;
    line-height: 1.6;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

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

.input-group input {
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.auth-hint {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.auth-hint a {
    color: var(--accent-primary);
    text-decoration: none;
}

.auth-hint a:hover {
    text-decoration: underline;
}

.hidden {
    display: none !important;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

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

.btn-primary:hover {
    background: var(--accent-primary-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-color-light);
}

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

.btn-success:hover {
    filter: brightness(1.1);
}

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

.btn-danger:hover {
    filter: brightness(1.1);
}

.btn-warning {
    background: var(--accent-warning);
    color: black;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-icon {
    font-size: 1rem;
}

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

.challenge-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    transition: all 0.2s ease;
}

.challenge-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.challenge-name {
    font-weight: 600;
    font-size: 1rem;
}

.challenge-category {
    font-size: 0.7rem;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.category-web { background: #3b82f620; color: #60a5fa; }
.category-pwn { background: #ef444420; color: #f87171; }
.category-rev { background: #8b5cf620; color: #a78bfa; }
.category-crypto { background: #10b98120; color: #34d399; }
.category-misc { background: #f59e0b20; color: #fbbf24; }
.category-forensics { background: #ec489920; color: #f472b6; }

.challenge-description {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    min-height: 40px;
}

.challenge-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.challenge-actions {
    display: flex;
    gap: 8px;
}

/* Instances List */
.instances-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.instance-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: center;
}

.instance-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.instance-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.instance-name {
    font-weight: 600;
    font-size: 1rem;
}

.instance-status {
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.status-running {
    background: var(--accent-success);
    color: white;
}

.status-starting {
    background: var(--accent-warning);
    color: black;
}

.status-stopping, .status-error {
    background: var(--accent-danger);
    color: white;
}

.instance-details {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.85rem;
}

.instance-detail {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}

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

.instance-urls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.instance-url {
    font-family: var(--font-mono);
    background: var(--bg-primary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    color: var(--accent-info);
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.instance-url:hover {
    background: var(--accent-info);
    color: white;
}

.instance-url .port-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 2px 4px;
    border-radius: 3px;
}

.instance-url:hover .port-label {
    background: rgba(255,255,255,0.2);
    color: white;
}

/* Instance Error Styles */
.instance-error-card {
    border-color: var(--accent-danger) !important;
    background: rgba(239, 68, 68, 0.1);
}

.instance-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--accent-danger);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin: 10px 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.instance-error .error-icon {
    flex-shrink: 0;
}

.instance-error .error-msg {
    font-size: 0.85rem;
    color: #fca5a5;
    word-break: break-word;
    font-family: var(--font-mono);
}

.instance-actions {
    display: flex;
    gap: 8px;
}

.instance-timer {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-warning);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 280px;
}

.toast.success {
    border-color: var(--accent-success);
    background: linear-gradient(135deg, var(--bg-card), #10b98110);
}

.toast.error {
    border-color: var(--accent-danger);
    background: linear-gradient(135deg, var(--bg-card), #ef444410);
}

.toast.info {
    border-color: var(--accent-info);
    background: linear-gradient(135deg, var(--bg-card), #3b82f610);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

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

.modal-body {
    padding: 20px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer p {
    margin: 4px 0;
}

.footer-credit {
    font-size: 0.8rem;
}

.footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .user-info {
        flex-direction: column;
        gap: 16px;
    }
    
    .challenges-grid {
        grid-template-columns: 1fr;
    }
    
    .instance-card {
        grid-template-columns: 1fr;
    }
    
    .instance-actions {
        justify-content: flex-end;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color-light);
}