/* ═══════════════════════════════════════════════
   Live-Checker Dashboard — Premium Dark Theme
   ═══════════════════════════════════════════════ */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: #16161f;
    --bg-elevated: #1c1c28;
    --bg-modal: #13131d;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #e8e8ef;
    --text-secondary: #8b8b9e;
    --text-muted: #5c5c72;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.25);
    --purple: #a855f7;
    --green: #22c55e;
    --green-glow: rgba(34, 197, 94, 0.2);
    --yellow: #eab308;
    --yellow-glow: rgba(234, 179, 8, 0.2);
    --red: #ef4444;
    --red-glow: rgba(239, 68, 68, 0.2);
    --blue: #3b82f6;
    --orange: #f97316;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.hidden {
    display: none !important;
}

/* ═══════════════ LOGIN ═══════════════ */
.login-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 1000;
}

.login-card {
    position: relative;
    width: 380px;
    padding: 48px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    overflow: hidden;
}

.login-glow {
    position: absolute;
    top: -120px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        opacity: 0.4;
        transform: translateX(-50%) scale(1);
    }

    50% {
        opacity: 0.7;
        transform: translateX(-50%) scale(1.1);
    }
}

.login-icon {
    color: var(--accent);
    margin-bottom: 20px;
    position: relative;
}

.login-title {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 400;
    margin-bottom: 32px;
}

.login-form {
    position: relative;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.login-btn {
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: var(--font);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: opacity var(--transition), transform var(--transition);
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.login-btn:active {
    transform: translateY(0);
}

.login-error {
    margin-top: 16px;
    color: var(--red);
    font-size: 13px;
    min-height: 20px;
}

/* ═══════════════ HEADER ═══════════════ */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transition: background var(--transition), box-shadow var(--transition);
}

.status-dot.connected {
    background: var(--green);
    box-shadow: 0 0 8px var(--green-glow);
}

.status-dot.disconnected {
    background: var(--red);
    box-shadow: 0 0 8px var(--red-glow);
}

.session-count {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    background: var(--accent);
    color: white;
    font-size: 12px;
    font-weight: 700;
    border-radius: 12px;
    padding: 0 8px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* ═══════════════ CONTROLS BAR ═══════════════ */
.controls-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 32px;
}

.page-title {
    font-size: 22px;
    font-weight: 700;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

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

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
}

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

/* ═══════════════ SESSIONS GRID ═══════════════ */
.sessions-grid {
    padding: 0 32px 32px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 16px;
}

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    color: var(--text-muted);
    text-align: center;
    gap: 12px;
}

.empty-state p {
    font-size: 16px;
    font-weight: 500;
}

.empty-state span {
    font-size: 13px;
}

/* ═══════════════ SESSION CARD ═══════════════ */
.session-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
    animation: card-in 0.3s ease-out;
}

@keyframes card-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.session-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

.card-email {
    font-size: 14px;
    font-weight: 600;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-status.success {
    background: var(--green-glow);
    color: var(--green);
}

.card-status.warning {
    background: var(--yellow-glow);
    color: var(--yellow);
}

.card-status.error {
    background: var(--red-glow);
    color: var(--red);
}

.card-status.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--blue);
}

.card-status.processing {
    background: rgba(168, 85, 247, 0.15);
    color: var(--purple);
    animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {

    0%,
    100% {
        opacity: 0.8;
    }

    50% {
        opacity: 1;
    }
}

.card-body {
    padding: 16px 20px;
}

.card-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.meta-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-value {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.card-challenge {
    margin-top: 12px;
    padding: 12px;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--radius-sm);
    text-align: center;
}

.challenge-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.challenge-code {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 4px;
    font-variant-numeric: tabular-nums;
}

.card-secret {
    margin-top: 12px;
    padding: 12px;
    background: rgba(34, 197, 94, 0.08);
    border: 1px solid rgba(34, 197, 94, 0.15);
    border-radius: var(--radius-sm);
}

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

.secret-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--green);
    font-family: 'Courier New', monospace;
    word-break: break-all;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
}

.card-footer .btn {
    padding: 6px 14px;
    font-size: 12px;
}

/* ═══════════════ MODAL ═══════════════ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    animation: fade-in 0.2s ease;
}

@keyframes fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal {
    background: var(--bg-modal);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 520px;
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    animation: modal-in 0.25s ease-out;
}

@keyframes modal-in {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 700;
}

.btn-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    transition: all var(--transition);
}

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

.modal-form {
    padding: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

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

.form-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    padding: 10px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group select {
    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='%238b8b9e' 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 12px center;
    padding-right: 36px;
}

.checkbox-group {
    display: flex;
    align-items: flex-end;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    text-transform: none;
    letter-spacing: 0;
}

.check-label {
    color: var(--text-primary);
    font-weight: 400;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding-top: 8px;
}

/* VNC Modal */
.vnc-modal {
    width: 80vw;
    max-width: 1200px;
    height: 75vh;
}

.vnc-container {
    width: 100%;
    height: calc(100% - 60px);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    overflow: hidden;
}

.vnc-canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.vnc-connecting,
.vnc-error {
    color: var(--text-secondary);
    font-size: 14px;
    text-align: center;
    padding: 40px;
}

.vnc-error {
    color: var(--red);
}

/* ═══════════════ RESPONSIVE ═══════════════ */
@media (max-width: 768px) {
    .header {
        padding: 12px 16px;
    }

    .controls-bar {
        padding: 16px;
    }

    .sessions-grid {
        padding: 0 16px 16px;
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .vnc-modal {
        width: 95vw;
        height: 60vh;
    }
}

/* ═══════════════ SCROLLBAR ═══════════════ */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}