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

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1e3a5f 0%, #2c4a6e 50%, #1e3a5f 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    max-width: 500px;
    padding: 2rem;
}

.loading-logo {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.loading-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.loading-subtitle {
    font-size: 1rem;
    color: #ffd700;
    letter-spacing: 0.15em;
    margin-bottom: 2rem;
}

.loading-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: #ffd700;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#loading-message {
    color: #ffffff;
    font-size: 1rem;
}

.loading-progress {
    margin-bottom: 1.5rem;
}

.loading-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255,255,255,0.2);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.loading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #bf0a30, #ffd700);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

#loading-detail {
    color: rgba(255,255,255,0.8);
    font-size: 0.85rem;
}

.loading-info {
    color: rgba(255,255,255,0.6);
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
}

:root {
    --bg-primary: #e8eaed;
    --bg-secondary: #f5f5f5;
    --bg-card: #ffffff;
    --navy: #1e3a5f;
    --navy-light: #2c4a6e;
    --red: #bf0a30;
    --red-dark: #9a0826;
    --gold: #ffd700;
    --text: #1a1a1a;
    --text-dim: #555555;
    --border: #d0d0d0;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
}

body {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text);
    min-height: 100vh;
}

.app-header {
    background: var(--navy);
    border-bottom: 4px solid var(--red);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sim-warning {
    color: #ff0000;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    font-weight: 900;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.3;
    text-shadow: 0 0 8px rgba(255, 0, 0, 0.4);
}

.logo-section { display: flex; align-items: center; gap: 1rem; }
.logo-img { width: 60px; height: 60px; object-fit: contain; border-radius: 4px; }

.app-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.75rem;
    color: #ffffff;
}

.app-subtitle {
    font-size: 0.7rem;
    color: var(--gold);
    letter-spacing: 0.15em;
    font-weight: 600;
}

.db-status { display: flex; align-items: center; gap: 0.75rem; }
.db-indicator { width: 10px; height: 10px; border-radius: 50%; background: var(--warning); }
.db-indicator.ready { background: var(--success); }
#db-count { font-size: 0.8rem; color: #ffffff; }

.btn-update {
    background: var(--red);
    border: none;
    color: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}
.btn-update:hover { background: var(--red-dark); }

.tab-navigation {
    max-width: 1200px;
    margin: 1.5rem auto;
    padding: 6px;
    display: flex;
    gap: 4px;
    background: var(--bg-card);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.tab-button {
    flex: 1;
    padding: 0.75rem 0.5rem;
    background: transparent;
    border: 2px solid transparent;
    color: var(--text-dim);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    white-space: nowrap;
}
.tab-button:hover { color: var(--navy); background: var(--bg-primary); }
.tab-button.active { background: var(--navy); color: #ffffff; }

.tab-content { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem 2rem; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.panel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.input-card label {
    display: block;
    font-size: 0.7rem;
    color: var(--navy);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.input-card input, .input-card select {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
}
.input-card input:focus, .input-card select:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(30,58,95,0.15); }

.airport-input { text-transform: uppercase; font-size: 1.25rem !important; color: var(--navy) !important; font-weight: 700; }
.airport-info { margin-top: 0.4rem; font-size: 0.75rem; color: var(--text-dim); min-height: 1.5em; }

.waypoints-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.section-header h3 { color: var(--navy); font-size: 0.9rem; text-transform: uppercase; }

.btn-secondary {
    background: #ffffff;
    border: 2px solid var(--navy);
    color: var(--navy);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}
.btn-secondary:hover { background: var(--navy); color: #ffffff; }

#waypoints-container { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.waypoint-item { display: flex; align-items: center; gap: 0.25rem; background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 4px; padding: 0.25rem; }
.waypoint-item input { width: 70px; background: transparent; border: none; color: var(--navy); font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; text-transform: uppercase; padding: 0.25rem; font-weight: 600; }
.waypoint-item input:focus { outline: none; }
.remove-waypoint { background: none; border: none; color: var(--red); cursor: pointer; font-size: 1.2rem; padding: 0.25rem; }
.hint { font-size: 0.75rem; color: var(--text-dim); margin-top: 0.5rem; }

.button-row { display: flex; gap: 1rem; margin-bottom: 1rem; }
.btn-primary { flex: 1; background: var(--red); color: #ffffff; border: none; padding: 0.875rem; border-radius: 6px; font-size: 0.95rem; font-weight: 700; cursor: pointer; text-transform: uppercase; letter-spacing: 0.05em; }
.btn-primary:hover { background: var(--red-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(191,10,48,0.3); }

.results-section { background: var(--bg-card); border: 1px solid var(--border); border-left: 4px solid var(--navy); border-radius: 8px; padding: 1.25rem; margin-top: 1rem; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.results-section h3, .results-section h4 { color: var(--navy); font-size: 0.9rem; margin-bottom: 0.75rem; }

.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1rem; }
.summary-card { background: var(--bg-secondary); border: 2px solid var(--navy); border-radius: 8px; padding: 1rem; text-align: center; }
.summary-value { font-family: 'JetBrains Mono', monospace; font-size: 1.75rem; color: var(--navy); font-weight: 700; }
.summary-label { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; font-weight: 600; }

.winds-info { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 6px; padding: 0.75rem 1rem; margin-bottom: 1rem; display: flex; justify-content: space-between; align-items: center; }
.winds-info h4 { margin: 0; font-size: 0.8rem; color: var(--navy); }
#winds-data { font-family: 'JetBrains Mono', monospace; color: var(--navy); font-weight: 600; }

.table-container { overflow-x: auto; }
.route-table, .fuel-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.route-table th, .route-table td, .fuel-table td { padding: 0.6rem; text-align: center; border-bottom: 1px solid var(--border); }
.route-table th { background: var(--navy); color: #ffffff; font-weight: 600; font-size: 0.7rem; text-transform: uppercase; }
.route-table td { font-family: 'JetBrains Mono', monospace; }
.fuel-table td:first-child { text-align: left; color: var(--text-dim); }
.fuel-table td:last-child { text-align: right; font-family: 'JetBrains Mono', monospace; color: var(--navy); font-weight: 600; }
.fuel-table .total td { border-top: 2px solid var(--red); padding-top: 0.75rem; }

/* Chart/Map Styles */
.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.chart-header {
    background: var(--navy);
    color: #ffffff;
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chart-header h3 { margin: 0; font-size: 1rem; }

.chart-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.chart-controls select {
    background: var(--navy-light);
    color: #ffffff;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 0.4rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.btn-small {
    background: var(--red);
    color: #ffffff;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
}
.btn-small:hover { background: var(--red-dark); }

.chart-status {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    margin-left: auto;
}
.chart-status.ready { background: var(--success); color: #fff; }
.chart-status.pending { background: var(--warning); color: #000; }

.route-line-ifr { background: #ff00ff; }

.chart-legend {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
}

.legend-item { display: flex; align-items: center; gap: 0.35rem; }
.legend-line { width: 20px; height: 3px; background: var(--red); border-radius: 2px; }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; border: 2px solid #ffffff; }
.dep-dot { background: #28a745; }
.dest-dot { background: var(--red); }
.wpt-dot { background: var(--navy); }

#vfr-map, #ifr-map {
    height: 500px;
    width: 100%;
    background: #ddd;
    display: block;
}

.map-placeholder {
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    color: var(--text-dim);
    font-size: 1rem;
}

.map-label {
    background: var(--navy) !important;
    color: #ffffff !important;
    border: none !important;
    padding: 2px 6px !important;
    font-weight: 600 !important;
    font-size: 11px !important;
    border-radius: 3px !important;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3) !important;
}

.map-label::before { border-top-color: var(--navy) !important; }

/* Briefing */
.placeholder { text-align: center; padding: 3rem; color: var(--text-dim); }
.briefing-header { margin-bottom: 1.5rem; }
.briefing-meta { display: flex; gap: 2rem; font-size: 0.85rem; color: var(--text-dim); }
.briefing-section { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin-bottom: 1rem; }
.briefing-section h4 { color: var(--navy); font-size: 0.9rem; margin-bottom: 0.75rem; border-bottom: 2px solid var(--border); padding-bottom: 0.5rem; }

.metar-item, .taf-item, .pirep-item, .notam-item, .tfr-item, .sigmet-item { background: var(--bg-secondary); border-radius: 4px; padding: 0.75rem; margin-bottom: 0.5rem; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; border-left: 3px solid var(--navy); }
.metar-item .station, .taf-item .station { color: var(--navy); font-weight: 700; }
.flight-cat { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 3px; font-size: 0.7rem; font-weight: 700; margin-left: 0.5rem; }
.flight-cat.vfr { background: var(--success); color: #fff; }
.flight-cat.mvfr { background: #3b82f6; color: #fff; }
.flight-cat.ifr { background: var(--red); color: #fff; }
.flight-cat.lifr { background: #9333ea; color: #fff; }
.tfr-item { border-left-color: var(--red); }
.no-data { color: var(--text-dim); font-style: italic; }

.winds-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.winds-table th, .winds-table td { padding: 0.5rem; text-align: center; border-bottom: 1px solid var(--border); }
.winds-table th { background: var(--navy); color: #ffffff; font-size: 0.75rem; }
.winds-table td { font-family: 'JetBrains Mono', monospace; }

/* Performance */
.perf-section { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 1.25rem; margin-bottom: 1rem; }
.perf-section h3 { color: var(--navy); font-size: 1rem; margin-bottom: 1rem; border-bottom: 2px solid var(--red); padding-bottom: 0.5rem; }
.perf-results { margin-top: 1rem; padding: 1rem; background: var(--bg-secondary); border: 2px solid var(--navy); border-radius: 6px; }
.result-row { display: flex; justify-content: space-between; padding: 0.4rem 0; }
.result-row .value { font-family: 'JetBrains Mono', monospace; font-size: 1.25rem; color: var(--navy); font-weight: 700; }

/* W&B */
.wb-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.wb-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1rem; }
.wb-card { background: var(--bg-secondary); border: 2px solid var(--navy); border-radius: 8px; padding: 1rem; text-align: center; }
.wb-value { font-family: 'JetBrains Mono', monospace; font-size: 1.5rem; color: var(--navy); font-weight: 700; }
.wb-label { font-size: 0.75rem; color: var(--text-dim); font-weight: 600; }
.wb-limit { font-size: 0.65rem; color: var(--text-dim); margin-top: 0.25rem; }
.status-message { padding: 0.75rem; border-radius: 6px; text-align: center; font-weight: 600; }
.status-message.success { background: rgba(40,167,69,0.1); border: 2px solid var(--success); color: var(--success); }
.status-message.danger { background: rgba(220,53,69,0.1); border: 2px solid var(--danger); color: var(--danger); }

/* Reference */
.ref-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.ref-card { background: var(--bg-card); border: 1px solid var(--border); border-top: 3px solid var(--red); border-radius: 8px; padding: 1rem; }
.ref-card h4 { color: var(--navy); font-size: 0.85rem; margin-bottom: 0.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.ref-card table { width: 100%; font-size: 0.85rem; }
.ref-card td { padding: 0.3rem 0; }
.ref-card td:first-child { color: var(--text-dim); }
.ref-card td:last-child { text-align: right; font-family: 'JetBrains Mono', monospace; color: var(--navy); font-weight: 600; }

/* Modal */
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal-content { background: var(--bg-card); border: 2px solid var(--navy); border-radius: 12px; padding: 2rem; max-width: 400px; width: 90%; text-align: center; }
.modal-content h3 { color: var(--navy); margin-bottom: 1.5rem; }
.progress-bar { width: 100%; height: 8px; background: var(--bg-secondary); border-radius: 4px; overflow: hidden; margin-bottom: 1rem; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--red), var(--navy)); width: 0%; transition: width 0.3s; }
.note { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 1rem; }

/* Airports Tab */
.airport-detail-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 1.25rem; margin-bottom: 1.5rem; }
.airport-detail-card h3 { color: var(--navy); font-family: 'Orbitron', sans-serif; font-size: 1.1rem; margin-bottom: 0.25rem; }
.airport-detail-card .airport-name { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1rem; }
.airport-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.airport-info-section h4 { color: var(--navy); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
.airport-info-row { display: flex; justify-content: space-between; padding: 0.3rem 0; font-size: 0.85rem; }
.airport-info-row .label { color: var(--text-dim); }
.airport-info-row .value { color: var(--text-primary); font-family: 'JetBrains Mono', monospace; font-weight: 500; }
.runway-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; margin-top: 0.5rem; }
.runway-table th { text-align: left; color: var(--navy); padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--border); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }
.runway-table td { padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--border); font-family: 'JetBrains Mono', monospace; }
.metar-box { background: #0a1628; border-radius: 6px; padding: 0.75rem; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; color: #7ec87e; margin-top: 0.5rem; word-break: break-all; }
.metar-box.simulated { color: #cc8400; }
.diagram-container { margin-top: 1rem; }
.diagram-container iframe { width: 100%; height: 500px; border: 1px solid var(--border); border-radius: 6px; background: #fff; }
.diagram-link { display: inline-block; margin-top: 0.5rem; color: var(--navy); font-size: 0.85rem; text-decoration: underline; }
.flight-cat-badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 3px; font-size: 0.75rem; font-weight: 700; margin-left: 0.5rem; }
.flight-cat-badge.vfr { background: #28a745; color: #fff; }
.flight-cat-badge.mvfr { background: #007bff; color: #fff; }
.flight-cat-badge.ifr { background: #bf0a30; color: #fff; }
.flight-cat-badge.lifr { background: #ff00ff; color: #fff; }

/* Terrain Profile */
.profile-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 1rem; }
.profile-header h3 { color: var(--navy); font-family: 'Orbitron', sans-serif; }
.profile-stats { display: flex; gap: 1.5rem; font-size: 0.85rem; align-items: center; flex-wrap: wrap; }
.profile-stat { color: var(--text-secondary); }
.profile-stat strong { color: var(--navy); }
.profile-clearance { padding: 0.25rem 0.75rem; border-radius: 4px; font-size: 0.8rem; font-weight: 600; }
.profile-clearance.ok { background: rgba(40,167,69,0.15); color: #28a745; }
.profile-clearance.warning { background: rgba(255,165,0,0.15); color: #cc8400; }
.profile-clearance.danger { background: rgba(191,10,48,0.15); color: #bf0a30; }
.profile-legend { display: flex; gap: 1.5rem; margin-bottom: 0.75rem; font-size: 0.8rem; color: var(--text-dim); }
.legend-swatch { display: inline-block; width: 14px; height: 10px; border-radius: 2px; margin-right: 4px; vertical-align: middle; }
.profile-canvas-container { background: #0a1628; border-radius: 8px; padding: 1rem; border: 1px solid var(--border); overflow: hidden; }
#terrain-canvas { width: 100%; height: 350px; display: block; cursor: crosshair; }
.profile-hover-info { font-size: 0.8rem; color: var(--text-dim); margin-top: 0.5rem; min-height: 1.2em; font-family: 'JetBrains Mono', monospace; }
.profile-loading { text-align: center; padding: 3rem; color: var(--text-dim); }
.profile-loading .spinner { display: inline-block; width: 24px; height: 24px; border: 3px solid var(--border); border-top-color: var(--navy); border-radius: 50%; animation: spin 0.8s linear infinite; margin-right: 0.5rem; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 768px) {
    .header-content { flex-direction: column; gap: 0.75rem; }
    .tab-navigation { flex-wrap: wrap; }
    .tab-button { flex: 1 1 30%; font-size: 0.75rem; padding: 0.6rem 0.25rem; }
    .summary-grid, .wb-summary { grid-template-columns: 1fr; }
    .logo-img { width: 50px; height: 50px; }
    #vfr-map, #ifr-map, .map-placeholder { height: 350px; }
    #terrain-canvas { height: 250px; }
    .chart-legend { font-size: 0.65rem; gap: 0.5rem; }
}