:root {
    --bg-dark: #070a12;
    --panel-bg: rgba(15, 23, 42, 0.9);
    --panel-border: rgba(56, 189, 248, 0.22);
    --accent-cyan: #00f0ff;
    --accent-blue: #38bdf8;
    --accent-purple: #a855f7;
    --accent-orange: #f97316;
    --accent-red: #ef4444;
    --accent-green: #10b981;
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Header & Nav */
.app-header {
    height: 60px;
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--panel-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    backdrop-filter: blur(12px);
    z-index: 100;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
}

.logo-title {
    display: flex;
    flex-direction: column;
}

.app-name {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #fff, var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-tagline {
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* Navigation Tabs */
.top-nav-tabs {
    display: flex;
    gap: 6px;
    background: rgba(15, 23, 42, 0.6);
    padding: 4px;
    border-radius: 10px;
    border: 1px solid var(--panel-border);
    overflow-x: auto;
}

.nav-tab-group {
    display: flex;
    align-items: center;
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 2px;
    gap: 2px;
    transition: all 0.2s ease;
}

.nav-tab-group:hover {
    border-color: var(--panel-border);
}

.nav-tab-group.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.nav-tab-btn {
    padding: 6px 10px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.nav-tab-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.nav-tab-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: #000;
    font-weight: 700;
}

.nav-tab-launch-btn {
    padding: 5px 8px;
    background: rgba(0, 240, 255, 0.15);
    border: 1px solid rgba(0, 240, 255, 0.35);
    color: var(--accent-cyan);
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
}

.nav-tab-launch-btn:hover {
    background: var(--accent-cyan);
    color: #000;
    box-shadow: 0 0 8px var(--accent-cyan);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.global-status-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-green);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-green);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
    100% { opacity: 1; transform: scale(1); }
}

/* Buttons */
.btn-preset {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--panel-border);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-preset:hover {
    background: rgba(56, 189, 248, 0.2);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-preset.primary {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.25), rgba(168, 85, 247, 0.25));
    border-color: var(--accent-cyan);
    color: #fff;
}

.btn-preset.primary:hover {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: #000;
    box-shadow: 0 0 12px var(--accent-cyan);
}

.btn-preset.danger {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--accent-red);
    color: #fff;
}

.btn-preset.danger:hover {
    background: var(--accent-red);
    color: #fff;
    box-shadow: 0 0 12px var(--accent-red);
}

.btn-preset.secondary {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Main Container & Views */
.main-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.view-screen {
    display: none;
    height: 100%;
    width: 100%;
}

.view-screen.active {
    display: flex;
    flex-direction: column;
}

#viewDashboard {
    padding: 20px;
    gap: 16px;
    overflow-y: auto;
}

/* Banner */
.dashboard-header-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    padding: 16px 20px;
}

.dashboard-title {
    font-size: 1.2rem;
    color: var(--accent-cyan);
    font-weight: 700;
    margin-bottom: 4px;
}

.dashboard-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Robot Grid */
.robot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 12px;
    width: 100%;
}

.robot-card {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    padding: 14px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 12px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.robot-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 4px 20px rgba(0, 240, 255, 0.15);
    transform: translateY(-2px);
}

.robot-card.active-selected {
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.08);
}

.robot-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

.robot-card-icon {
    font-size: 2rem;
    line-height: 1;
}

.robot-status-pill {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 12px;
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.robot-status-pill.online {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.4);
    color: var(--accent-green);
}

.robot-status-pill.offline {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.4);
    color: var(--accent-red);
}

.robot-card-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.robot-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
}

.robot-port {
    font-size: 0.72rem;
    font-family: monospace;
    color: var(--accent-cyan);
}

.robot-dir-path {
    font-size: 0.68rem;
    font-family: monospace;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    background: rgba(255, 255, 255, 0.04);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.robot-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.3;
    height: 32px;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.robot-card-actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.action-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

/* Active Frame Viewer */
.active-frame-container {
    flex: 1;
    min-height: 480px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.active-frame-header {
    height: 44px;
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--panel-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.active-frame-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.frame-url-badge {
    font-size: 0.75rem;
    font-family: monospace;
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-cyan);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid rgba(0, 240, 255, 0.3);
}

.active-frame-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.active-frame-wrapper {
    flex: 1;
    position: relative;
    width: 100%;
    height: 100%;
    background: #000;
}

.active-frame-wrapper iframe, .fullscreen-view iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.frame-placeholder {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, #0f172a 0%, #070a12 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-align: center;
    padding: 20px;
    z-index: 10;
}

.placeholder-icon {
    font-size: 3rem;
}

.frame-placeholder h3 {
    color: var(--accent-cyan);
    font-size: 1.2rem;
}

.frame-placeholder p {
    color: var(--text-muted);
    font-size: 0.85rem;
    max-width: 480px;
}

/* Modal Backdrop & Card */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-card {
    background: #0f172a;
    border: 1px solid var(--accent-cyan);
    border-radius: var(--radius);
    width: 90%;
    max-width: 580px;
    box-shadow: 0 10px 40px rgba(0, 240, 255, 0.25);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    padding: 16px 20px;
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--panel-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.1rem;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.modal-close-btn:hover {
    color: #fff;
}

.modal-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-footer {
    padding: 14px 20px;
    background: rgba(15, 23, 42, 0.95);
    border-top: 1px solid var(--panel-border);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Form Elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-row {
    display: flex;
    gap: 12px;
}

.flex-1 {
    flex: 1;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.form-input {
    background: rgba(30, 41, 59, 0.9);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 10px 12px;
    color: #fff;
    font-size: 0.88rem;
    font-family: monospace;
    outline: none;
    transition: all 0.2s ease;
}

.form-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.form-hint {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.config-defaults-info {
    background: rgba(56, 189, 248, 0.08);
    border: 1px dashed rgba(56, 189, 248, 0.3);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.78rem;
    color: var(--accent-blue);
}