/* ═══════════════════════════════════════════════════════════════
   TERRAMATCH NEXUS — Layout CSS
   Header, footer, main grid, sidebars, tab content areas
   ═══════════════════════════════════════════════════════════════ */

/* ── Splash Screen ── */
#splash {
    position: fixed;
    inset: 0;
    z-index: var(--z-splash);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    background-image: radial-gradient(ellipse at center, #041a28 0%, #020b14 70%);
}

#splash .splash-title {
    font-family: var(--font-body);
    font-weight: 200;
    font-size: 42px;
    color: var(--teal);
    letter-spacing: 8px;
    text-transform: uppercase;
    margin-bottom: 8px;
    text-shadow: 0 0 40px rgba(0,245,212,0.3);
}

#splash .splash-subtitle {
    font-family: var(--font-display);
    font-size: 13px;
    color: var(--text-dim);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 40px;
}

#splash .splash-bar-track {
    width: 360px;
    height: 3px;
    background: rgba(0,245,212,0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 24px;
}

#splash .splash-bar-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--teal), var(--cyan));
    border-radius: 2px;
    box-shadow: 0 0 16px rgba(0,245,212,0.5);
}

#splash .splash-status {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--teal-dim);
    letter-spacing: 1px;
    height: 18px;
}

/* ── Main App Container ── */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    opacity: 0;
}

/* ── Header ── */
#header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: rgba(2,11,20,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

/* Header — Logo */
.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-mark {
    width: 36px;
    height: 36px;
    border: 1.5px solid var(--teal);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.logo-mark svg {
    width: 20px;
    height: 20px;
}

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

.logo-text .logo-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 14px;
    color: var(--teal);
    letter-spacing: 3px;
    line-height: 1;
}

.logo-text .logo-tagline {
    font-family: var(--font-mono);
    font-size: 8px;
    color: var(--text-dim);
    letter-spacing: 0.5px;
    margin-top: 2px;
}

/* Header — Navigation */
.header-nav {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-tab {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-dim);
    padding: 8px 14px;
    border-radius: 4px;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
    position: relative;
}

.nav-tab:hover {
    color: var(--teal);
    background: var(--glass);
    text-shadow: 0 0 10px rgba(0,245,212,0.3);
}

.nav-tab.active {
    color: var(--teal);
    border-bottom-color: var(--teal);
    background: var(--glass);
}

/* Header — Status Strip */
.header-status {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-dim);
    white-space: nowrap;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot.green {
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
}

.status-dot.amber {
    background: var(--amber);
    box-shadow: 0 0 6px var(--amber);
}

.version-badge {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--text-dim);
    background: rgba(0,245,212,0.06);
    padding: 2px 8px;
    border-radius: 3px;
    border: 1px solid var(--border);
}

#live-clock {
    color: var(--teal);
    font-family: var(--font-mono);
    font-size: 11px;
    min-width: 72px;
    text-align: right;
}

/* ── Footer ── */
#footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-footer);
    height: var(--footer-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: rgba(2,11,20,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-dim);
}

#footer-coords {
    color: var(--teal-dim);
    min-width: 200px;
    text-align: center;
}

.footer-classified {
    color: var(--red);
    opacity: 0.6;
    letter-spacing: 2px;
}

/* ── Main Content Area ── */
#main-content {
    flex: 1;
    margin-top: 0;
    margin-bottom: var(--footer-h);
    overflow: hidden;
    position: relative;
}

/* ── Tab Sections ── */
.tab-section {
    display: none;
    position: absolute;
    inset: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0;
}

.tab-section.active {
    display: block;
}

/* ── Command Center Layout ── */
.command-layout {
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    gap: 0;
}

.command-left {
    padding: 12px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.command-center {
    position: relative;
    cursor: crosshair;
    overflow: hidden;
}

.command-right {
    padding: 12px;
    overflow-y: auto;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── Risk Engine Layout ── */
.risk-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    gap: 0;
}

.risk-map-area {
    position: relative;
    overflow: hidden;
    padding: 12px;
}

.risk-right {
    padding: 12px;
    overflow-y: auto;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── Simulation Layout ── */
.sim-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    gap: 0;
}

.sim-center {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
}

.sim-right {
    padding: 12px;
    overflow-y: auto;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── AI Match Layout ── */
.match-layout {
    display: grid;
    grid-template-columns: 300px 1fr 320px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    gap: 0;
}

.match-left {
    padding: 12px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.match-center {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.match-right {
    padding: 12px;
    overflow-y: auto;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── Smart Cities Layout ── */
.cities-layout {
    padding: 16px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    overflow-y: auto;
    position: relative;
}

.cities-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

/* ── City Detail Slide Panel ── */
.city-detail-panel {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: var(--footer-h);
    width: 360px;
    background: var(--bg2);
    border-left: 1px solid var(--border);
    z-index: 500;
    overflow-y: auto;
    padding: 20px;
    transform: translateX(360px);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.city-detail-panel.open {
    transform: translateX(0);
}

/* ── Alerts Layout ── */
.alerts-layout {
    padding: 16px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.alerts-summary {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.alerts-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    flex: 1;
    min-height: 0;
}

.alert-column {
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    max-height: calc(100vh - var(--header-h) - var(--footer-h) - 120px);
}

/* ── Analytics Layout ── */
.analytics-layout {
    padding: 16px;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.kpi-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    flex: 1;
}

/* ── Field Ops Layout ── */
.fieldops-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: calc(100vh - var(--header-h) - var(--footer-h));
    gap: 0;
}

.fieldops-actions {
    padding: 12px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.fieldops-content {
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ── Modal Overlay ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background: rgba(2,11,20,0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 32px;
    min-width: 400px;
    max-width: 560px;
    position: relative;
}

/* ── Responsive adjustments ── */
@media (max-width: 1400px) {
    .cities-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .charts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1100px) {
    .command-layout {
        grid-template-columns: 240px 1fr 280px;
    }
    .cities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .nav-tab {
        font-size: 10px;
        padding: 6px 10px;
        letter-spacing: 1px;
    }
}