:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2236;
    --bg-card-hover: #1e2a42;
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --gold: #f59e0b;
    --red: #ef4444;
    --green: #22c55e;
    --yellow: #eab308;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-dim: #64748b;
    --border: #1e293b;
    --lcars-orange: #ff9900;
    --lcars-blue: #9999ff;
    --lcars-purple: #cc99cc;
    --lcars-red: #cc6666;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* LCARS-inspired top bar */
.lcars-bar {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-bottom: 3px solid var(--lcars-orange);
    padding: 0;
    height: 60px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.lcars-cap {
    width: 120px;
    height: 60px;
    background: var(--lcars-orange);
    border-radius: 0 0 30px 0;
    flex-shrink: 0;
}

.lcars-title {
    padding: 0 20px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--lcars-orange);
}

.lcars-status {
    margin-left: auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

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

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

.sync-dot.offline { background: var(--red); animation: none; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Navigation */
.nav-tabs {
    display: flex;
    gap: 2px;
    padding: 10px 20px;
    margin-top: 60px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-tab {
    padding: 10px 18px;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: none;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    white-space: nowrap;
    transition: all 0.2s;
}

.nav-tab:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.nav-tab.active {
    background: var(--lcars-orange);
    color: #000;
}

/* Main content */
.main {
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 16px;
    transition: border-color 0.2s;
}

.card:hover { border-color: var(--accent); }

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

.card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--lcars-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
}

.badge-critical { background: var(--red); color: #fff; }
.badge-warning { background: var(--yellow); color: #000; }
.badge-ok { background: var(--green); color: #000; }

/* Dashboard grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--lcars-orange);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Diagnostic issues list */
.issue-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 8px;
    border-left: 4px solid var(--text-dim);
}

.issue-item.high { border-left-color: var(--red); }
.issue-item.medium { border-left-color: var(--yellow); }
.issue-item.low { border-left-color: var(--green); }

.issue-icon {
    font-size: 20px;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.issue-content { flex: 1; }

.issue-title {
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 2px;
}

.issue-detail {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.issue-fix {
    font-size: 12px;
    color: var(--green);
    font-weight: 600;
}

/* Research table */
.research-table {
    width: 100%;
    border-collapse: collapse;
}

.research-table th {
    text-align: left;
    padding: 10px;
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 2px solid var(--border);
}

.research-table td {
    padding: 10px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

.research-table tr:hover td {
    background: var(--bg-card-hover);
}

.level-bar {
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    min-width: 80px;
}

.level-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}

.level-fill.full { background: var(--green); }
.level-fill.partial { background: var(--yellow); }
.level-fill.empty { background: var(--red); }

/* Crew cards */
.crew-card {
    display: flex;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 10px;
    margin-bottom: 10px;
}

.crew-slot {
    text-align: center;
    padding: 10px;
    background: var(--bg-card);
    border-radius: 8px;
    min-width: 100px;
}

.crew-slot-label {
    font-size: 10px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.crew-slot-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--lcars-blue);
}

/* Section views */
.section { display: none; }
.section.active { display: block; }

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

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--lcars-orange);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-dim);
}

.empty-state h3 {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    max-width: 400px;
    margin: 0 auto;
}

/* Responsive */
@media (max-width: 768px) {
    .lcars-cap { width: 60px; }
    .lcars-title { font-size: 16px; padding: 0 12px; }
    .main { padding: 12px; }
    .dashboard-grid { grid-template-columns: 1fr 1fr; }
    .nav-tab { padding: 8px 12px; font-size: 11px; }
    .crew-card { flex-wrap: wrap; }
}

/* Calculator */
.calc-controls {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.calc-field {
    flex: 1;
    min-width: 120px;
}

.calc-field label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.calc-field select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

.calc-field select:focus {
    outline: none;
    border-color: var(--lcars-orange);
}

.calc-btn {
    padding: 10px 24px;
    background: var(--lcars-orange);
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.calc-btn:hover { opacity: 0.85; }

.cost-table {
    width: 100%;
    border-collapse: collapse;
}

.cost-table th {
    text-align: left;
    padding: 10px;
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 2px solid var(--border);
}

.cost-table td {
    padding: 10px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

.cost-table tr:hover td { background: var(--bg-card-hover); }

.calc-tier-card .calc-tier-detail {
    display: none;
    margin-top: 12px;
}

.calc-tier-card.expanded .calc-tier-detail {
    display: block;
}

.calc-comp {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
}

.calc-comp-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--lcars-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.calc-cost-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    font-size: 12px;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .calc-controls { flex-direction: column; }
    .calc-field { min-width: 100%; }
}

@media (max-width: 480px) {
    .dashboard-grid { grid-template-columns: 1fr; }
}

/* Advisor Chat */
.advisor-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 180px);
    max-height: 700px;
}

.advisor-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 12px 12px 0 0;
    border: 1px solid var(--border);
    border-bottom: none;
}

.advisor-msg {
    display: flex;
    margin-bottom: 16px;
    gap: 10px;
}

.advisor-msg.advisor-user {
    flex-direction: row-reverse;
}

.advisor-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    font-weight: 700;
}

.advisor-bot .advisor-avatar {
    background: var(--lcars-orange);
    color: #000;
}

.advisor-user .advisor-avatar {
    background: var(--accent);
    color: #fff;
}

.advisor-msg-content {
    max-width: 75%;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
}

.advisor-bot .advisor-msg-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.advisor-user .advisor-msg-content {
    background: var(--accent);
    color: #fff;
}

.advisor-msg-content p { margin-bottom: 8px; }
.advisor-msg-content p:last-child { margin-bottom: 0; }
.advisor-msg-content strong { color: var(--lcars-orange); }
.advisor-user .advisor-msg-content strong { color: #fff; }
.advisor-msg-content code {
    background: rgba(255,255,255,0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}
.advisor-msg-content ul, .advisor-msg-content ol {
    margin: 8px 0;
    padding-left: 20px;
}
.advisor-msg-content li { margin-bottom: 4px; }

.advisor-thinking {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: var(--text-dim);
    font-size: 13px;
}

.advisor-thinking-dots span {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--lcars-orange);
    border-radius: 50%;
    animation: advisorDot 1.4s infinite ease-in-out;
    margin-right: 3px;
}

.advisor-thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.advisor-thinking-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes advisorDot {
    0%, 80%, 100% { opacity: 0.2; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1.2); }
}

.advisor-input-area {
    display: flex;
    gap: 8px;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0 0 12px 12px;
}

.advisor-input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    resize: none;
    outline: none;
}

.advisor-input:focus {
    border-color: var(--lcars-orange);
}

.advisor-input::placeholder {
    color: var(--text-dim);
}

.advisor-send {
    padding: 12px 20px;
    background: var(--lcars-orange);
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.advisor-send:hover { opacity: 0.85; }
.advisor-send:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.advisor-welcome {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.advisor-welcome h3 {
    color: var(--lcars-orange);
    font-size: 18px;
    margin-bottom: 8px;
}

.advisor-welcome p {
    font-size: 14px;
    max-width: 500px;
    margin: 0 auto 16px;
}

.advisor-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.advisor-suggestion {
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.advisor-suggestion:hover {
    border-color: var(--lcars-orange);
    color: var(--lcars-orange);
}

/* Efficiency breakdown */
.eff-category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.eff-category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    font-size: 12px;
}

.eff-category-name {
    color: var(--text-secondary);
    text-transform: capitalize;
}

.eff-category-value {
    color: var(--green);
    font-weight: 700;
}

.eff-pct {
    color: var(--green);
    font-size: 11px;
    font-weight: 600;
}