/* ============================================
   Ionospheric Ray Tracer — Design System
   ============================================ */

:root {
    /* Color palette */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-input: rgba(30, 41, 59, 0.8);
    --border: rgba(99, 102, 241, 0.15);
    --border-hover: rgba(99, 102, 241, 0.35);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-indigo: #6366f1;
    --accent-cyan: #06b6d4;
    --accent-rose: #f43f5e;
    --accent-amber: #f59e0b;
    --accent-emerald: #10b981;

    --gradient-primary: linear-gradient(135deg, #6366f1, #06b6d4);
    --gradient-warm: linear-gradient(135deg, #f43f5e, #f59e0b);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --panel-width: 320px;
    --header-height: 56px;

    /* Effects */
    --blur: 16px;
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* ---- Layout ---- */

#app {
    display: grid;
    grid-template-columns: 1fr var(--panel-width);
    grid-template-rows: var(--header-height) 1fr;
    height: 100vh;
    position: relative;
}

/* ---- Header ---- */

#header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    border-bottom: 1px solid var(--border);
    z-index: 10;
}

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

.logo h1 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stats {
    display: flex;
    gap: 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
}

.stats span {
    padding: 4px 10px;
    background: var(--bg-input);
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* ---- Canvas ---- */

#canvas {
    grid-column: 1;
    width: 100%;
    height: 100%;
    display: block;
    background: var(--bg-primary);
}

#globe-container {
    grid-column: 1;
    grid-row: 1;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

/* ---- Legend Overlay ---- */

.legend-overlay {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(17, 24, 39, 0.88);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 11px;
    color: var(--text-secondary);
    z-index: 5;
    max-height: 40vh;
    overflow-y: auto;
    display: none;
    min-width: 160px;
    max-width: 380px;
}

.legend-overlay.visible {
    display: block;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 3px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.legend-swatch {
    width: 14px;
    height: 4px;
    border-radius: 2px;
    flex-shrink: 0;
}

.legend-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
}

.legend-title {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

/* ---- View Controls Overlay ---- */

.view-controls {
    position: absolute;
    top: calc(var(--header-height) + 10px);
    right: calc(var(--panel-width) + 16px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 5;
    transition: right var(--transition);
}

.fullscreen-map .view-controls {
    right: 16px;
}

.view-toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
    background: rgba(17, 24, 39, 0.88);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 3px;
}

.pan-toolbar {
    flex-direction: column;
    padding: 4px;
}

.pan-row {
    display: flex;
    gap: 2px;
}

.view-btn {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 10px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    min-width: 32px;
    text-align: center;
    line-height: 1.2;
}

.view-btn:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
}

.view-btn:active {
    transform: scale(0.93);
}

.pan-btn {
    padding: 3px 8px;
    font-size: 12px;
    min-width: 28px;
}

.reset-btn {
    font-size: 14px;
    padding: 3px 8px;
    min-width: 28px;
}

.zoom-indicator {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    min-width: 40px;
    text-align: center;
    padding: 0 2px;
}

.fullscreen-btn {
    font-size: 16px;
    padding: 4px 8px;
    background: rgba(17, 24, 39, 0.88);
    backdrop-filter: blur(12px);
}

.fullscreen-btn.active {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.15);
}

/* ---- Resize Handle ---- */

.resize-handle {
    position: absolute;
    top: var(--header-height);
    right: var(--panel-width);
    width: 6px;
    height: calc(100vh - var(--header-height));
    cursor: col-resize;
    z-index: 12;
    background: transparent;
    transition: background var(--transition), right var(--transition);
}

.resize-handle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 1px;
    width: 4px;
    height: 40px;
    transform: translateY(-50%);
    background: var(--border);
    border-radius: 2px;
    transition: background var(--transition);
}

.resize-handle:hover,
.resize-handle.dragging {
    background: rgba(99, 102, 241, 0.1);
}

.resize-handle:hover::after,
.resize-handle.dragging::after {
    background: var(--accent-indigo);
}

.fullscreen-map .resize-handle {
    display: none;
}

/* ---- Fullscreen Map Mode ---- */

.fullscreen-map #controls {
    display: none;
}

.fullscreen-map #canvas {
    grid-column: 1 / -1;
}

/* ---- Run Mode Toggle ---- */

.run-mode-section {
    padding: 10px 14px;
}

.mode-toggle {
    display: flex;
    gap: 4px;
}

.mode-btn {
    flex: 1;
    padding: 7px 10px;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.mode-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}

.mode-btn.active {
    color: #fff;
    background: var(--accent-indigo);
    border-color: var(--accent-indigo);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.3);
}

/* ---- Target Controls ---- */

.target-section {
    border-color: rgba(244, 63, 94, 0.2);
}

.target-input {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-primary);
    color: var(--accent-cyan);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 13px;
    outline: none;
    text-align: center;
}

.target-input:focus {
    border-color: var(--accent-rose);
}

.target-button {
    background: var(--gradient-warm);
    box-shadow: 0 4px 16px rgba(244, 63, 94, 0.3);
}

.target-button:hover {
    box-shadow: 0 6px 24px rgba(244, 63, 94, 0.4);
}

.target-btn-row {
    display: flex;
    gap: 6px;
}

.target-btn-row .target-button {
    flex: 1;
}

.stop-button {
    background: linear-gradient(135deg, #dc2626, #991b1b);
    box-shadow: 0 4px 16px rgba(220, 38, 38, 0.3);
    flex: 0 0 auto;
    padding: 8px 14px;
}

.stop-button:hover {
    box-shadow: 0 6px 24px rgba(220, 38, 38, 0.5);
}

.target-log {
    margin-top: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.target-log-header {
    padding: 6px 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: rgba(30, 41, 59, 0.3);
}

.target-log-body {
    max-height: 200px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-secondary);
    padding: 4px 0;
}

.target-log-body::-webkit-scrollbar {
    width: 3px;
}

.target-log-body::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.target-log-row {
    display: grid;
    grid-template-columns: 24px 1fr 1fr 1fr;
    gap: 4px;
    padding: 3px 10px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.06);
}

.target-log-row.header {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 9px;
    text-transform: uppercase;
}

.target-log-row.success {
    color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.06);
}

.target-log-row.fail {
    color: var(--accent-rose);
    opacity: 0.6;
}

.target-log-row.escape {
    color: var(--text-muted);
    opacity: 0.4;
}

/* ---- Target Range Summary ---- */

.target-range-summary {
    margin-top: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.target-range-summary-header {
    padding: 6px 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: rgba(30, 41, 59, 0.3);
}

.target-range-summary-body {
    padding: 6px 10px;
    font-family: var(--font-mono);
    font-size: 11px;
}

.range-stat {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
    color: var(--text-secondary);
}

.range-stat span:last-child {
    color: var(--accent-cyan);
    font-weight: 500;
}

.range-hint {
    padding: 6px 10px;
    font-size: 10px;
    color: var(--accent-amber);
    border-top: 1px solid var(--border);
    line-height: 1.4;
}

.range-hint.good {
    color: var(--accent-emerald);
}

.range-hint:empty {
    display: none;
}

select.target-input {
    text-align: left;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' fill='none' stroke='%2394a3b8' stroke-width='1.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 24px;
}

/* ---- Target Quick/Advanced Toggle ---- */

.target-mode-toggle {
    display: flex;
    gap: 4px;
    margin: 6px 0;
}

.target-mode-btn {
    flex: 1;
    padding: 5px 8px;
    font-family: var(--font-sans);
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.target-mode-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-secondary);
}

.target-mode-btn.active {
    color: #fff;
    background: var(--accent-rose);
    border-color: var(--accent-rose);
    box-shadow: 0 0 10px rgba(244, 63, 94, 0.25);
}

/* ---- Advanced Sweep Params ---- */

.adv-info-note {
    font-size: 10px;
    color: var(--text-muted);
    margin-bottom: 6px;
    padding: 4px 8px;
    background: rgba(99, 102, 241, 0.06);
    border-radius: 4px;
    line-height: 1.4;
}

.adv-info-note b {
    color: var(--accent-cyan);
}

.adv-sweep-param {
    margin-bottom: 6px;
    padding: 4px 0;
    border-bottom: 1px solid rgba(99, 102, 241, 0.06);
}

.adv-sweep-param:last-of-type {
    border-bottom: none;
}

.adv-sweep-header {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    margin-bottom: 4px;
}

.adv-sweep-header input[type="checkbox"] {
    accent-color: var(--accent-rose);
    cursor: pointer;
}

.adv-sweep-name {
    font-size: 11px;
    color: var(--text-secondary);
}

.adv-hidden {
    display: none !important;
}

.adv-fixed-row {
    margin-bottom: 2px;
}

.adv-combo-info {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    padding: 4px;
    background: rgba(99, 102, 241, 0.06);
    border-radius: 4px;
    margin-top: 4px;
}

.adv-combo-info.warning {
    color: var(--accent-amber);
    background: rgba(245, 158, 11, 0.1);
}

/* ---- Advanced Results Table ---- */

.adv-results {
    margin-top: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.adv-results-header {
    padding: 6px 10px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: rgba(30, 41, 59, 0.3);
}

.adv-results-body {
    max-height: 250px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 10px;
    padding: 4px 0;
}

.adv-results-body::-webkit-scrollbar {
    width: 3px;
}

.adv-results-body::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.adv-result-row {
    display: grid;
    grid-template-columns: 20px 1fr 70px 60px;
    gap: 4px;
    padding: 4px 10px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.06);
    color: var(--text-secondary);
    align-items: center;
}

.adv-result-row.header {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 9px;
    text-transform: uppercase;
}

.adv-result-row.best {
    color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.06);
}

.adv-result-row.good {
    color: var(--accent-cyan);
}

.adv-result-row.miss {
    color: var(--text-muted);
    opacity: 0.6;
}

/* ---- Controls Panel ---- */

#controls {
    grid-column: 2;
    overflow-y: auto;
    padding: 8px 10px;
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur));
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-section {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 10px;
}

.control-section h2 {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 6px;
}

/* ---- TX Location Section ---- */

.location-section {
    border-color: rgba(16, 185, 129, 0.2);
}

.location-row {
    display: flex;
    gap: 8px;
    margin-bottom: 6px;
}

.location-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.location-field span {
    font-size: 10px;
    color: var(--text-muted);
}

.location-field input {
    width: 100%;
    padding: 5px 8px;
    background: var(--bg-primary);
    color: var(--accent-emerald);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 12px;
    outline: none;
    text-align: center;
    transition: border-color var(--transition);
}

.location-field input:focus {
    border-color: var(--accent-emerald);
}

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

.geolocate-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 10px;
    background: linear-gradient(135deg, #10b981, #06b6d4);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}

.geolocate-btn:hover {
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
    transform: translateY(-1px);
}

.geolocate-btn:active {
    transform: translateY(0) scale(0.97);
}

.geolocate-btn.locating {
    opacity: 0.7;
    pointer-events: none;
}

.geolocate-btn.locating .geo-icon {
    animation: pulse-geo 1s ease-in-out infinite;
}

@keyframes pulse-geo {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.geo-status {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--text-muted);
    padding: 3px 8px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: 4px;
    white-space: nowrap;
}

.geo-status.located {
    color: var(--accent-emerald);
    background: rgba(16, 185, 129, 0.1);
}

.geo-status.error {
    color: var(--accent-rose);
    background: rgba(244, 63, 94, 0.1);
}

/* ---- Accordion sections ---- */

.section-toggle {
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0 !important;
    padding: 2px 0;
}

.section-toggle:hover {
    color: var(--text-secondary);
}

.chevron {
    font-size: 10px;
    transition: transform 0.2s;
}

.section-body {
    overflow: hidden;
    max-height: 600px;
    transition: max-height 0.3s ease, opacity 0.2s ease, margin-top 0.2s ease;
    opacity: 1;
    margin-top: 6px;
}

.section-body.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

/* ---- Compact slider rows ---- */

.compact-slider {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}

.compact-slider:last-child {
    margin-bottom: 0;
}

.compact-label {
    font-size: 10px;
    color: var(--text-secondary);
    white-space: nowrap;
    min-width: 56px;
    flex-shrink: 0;
}

.compact-slider input[type="range"] {
    flex: 1;
    min-width: 0;
}

.compact-slider output {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--text-primary);
    min-width: 30px;
    text-align: right;
    flex-shrink: 0;
}

.compact-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2px;
}

.compact-slider-header span {
    font-size: 10px;
    color: var(--text-secondary);
}

.control-section label {
    display: block;
    margin-bottom: 5px;
}

.control-section label:last-child {
    margin-bottom: 0;
}

.control-section label>span {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.slider-row output {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-cyan);
    min-width: 36px;
    text-align: right;
}

/* Range slider styling */
input[type="range"] {
    -webkit-appearance: none;
    flex: 1;
    height: 4px;
    background: rgba(99, 102, 241, 0.15);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-indigo);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
    transition: transform var(--transition), box-shadow var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 16px rgba(99, 102, 241, 0.6);
}

select {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

select:focus {
    border-color: var(--accent-indigo);
}

/* ---- Checkbox Group (chip style) ---- */

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.chip {
    display: flex !important;
    align-items: center;
    gap: 0;
    margin-bottom: 0 !important;
    cursor: pointer;
}

.chip input[type="checkbox"] {
    display: none;
}

.chip span {
    display: inline-block !important;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all var(--transition);
    cursor: pointer;
    user-select: none;
    margin-bottom: 0 !important;
}

.chip input[type="checkbox"]:checked+span {
    color: #fff;
    background: var(--accent-indigo);
    border-color: var(--accent-indigo);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.chip:hover span {
    border-color: var(--border-hover);
}

/* ---- Sweep Toggle ---- */

.sweep-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 4px;
    margin-top: -2px;
}

.sweep-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 2px 6px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-muted);
    transition: all var(--transition);
    line-height: 1;
}

.sweep-toggle:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.sweep-toggle.active {
    background: rgba(6, 182, 212, 0.15);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* ---- Sweep Range Inputs ---- */

.sweep-range {
    overflow: hidden;
    max-height: 200px;
    transition: max-height 0.3s ease, opacity 0.2s ease;
    opacity: 1;
}

.sweep-range.hidden {
    max-height: 0;
    opacity: 0;
    pointer-events: none;
}

.sweep-inputs {
    display: flex;
    gap: 8px;
    margin-top: 6px;
}

.sweep-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sweep-field span {
    font-size: 9px !important;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted) !important;
    margin-bottom: 0 !important;
}

.sweep-field input[type="number"] {
    width: 100%;
    padding: 5px 6px;
    background: var(--bg-primary);
    color: var(--accent-cyan);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 12px;
    outline: none;
    text-align: center;
}

.sweep-field input[type="number"]:focus {
    border-color: var(--accent-cyan);
}

/* Remove spinner arrows on number inputs */
.sweep-field input[type="number"]::-webkit-outer-spin-button,
.sweep-field input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.sweep-field input[type="number"] {
    -moz-appearance: textfield;
}

/* ---- Trace Button ---- */

.trace-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 8px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition), transform var(--transition),
        box-shadow var(--transition);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
    position: relative;
}

.trace-button:hover {
    opacity: 0.92;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.4);
}

.trace-button:active {
    transform: translateY(0);
}

.trace-button.loading {
    opacity: 0.7;
    pointer-events: none;
}

.trace-button.loading .btn-icon {
    animation: spin 0.8s linear infinite;
}

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

/* ---- Combo Counter Badge ---- */

.combo-counter {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 7px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
    line-height: 1.4;
}

.combo-counter.warning {
    background: rgba(245, 158, 11, 0.4);
}

.combo-counter.danger {
    background: rgba(244, 63, 94, 0.4);
}

/* ---- Export Buttons ---- */

.export-buttons {
    display: flex;
    gap: 8px;
}

.export-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 5px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.export-btn:hover:not(:disabled) {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.08);
}

.export-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ---- Info Panel ---- */

.info-panel {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 11px;
    color: var(--text-secondary);
    min-height: 40px;
}

.info-hint {
    color: var(--text-muted);
    font-style: italic;
}

.info-panel .ray-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 8px;
}

.info-panel .ray-detail dt {
    color: var(--text-muted);
}

.info-panel .ray-detail dd {
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    text-align: right;
}

.info-panel .config-label {
    font-size: 10px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 6px;
    color: #fff;
}

/* ---- Progress Bar ---- */

.trace-progress {
    height: 3px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: -4px;
    margin-bottom: 4px;
    display: none;
}

.trace-progress.visible {
    display: block;
}

.trace-progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
}

/* ---- Scrollbar ---- */

#controls::-webkit-scrollbar {
    width: 4px;
}

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

#controls::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.legend-overlay::-webkit-scrollbar {
    width: 3px;
}

.legend-overlay::-webkit-scrollbar-track {
    background: transparent;
}

.legend-overlay::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

/* ---- Header Actions ---- */

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--accent-cyan);
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition);
}

.header-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-indigo);
    transform: scale(1.05);
    box-shadow: 0 0 16px rgba(99, 102, 241, 0.2);
}

/* ---- Info Modal ---- */

.info-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

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

.info-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: min(720px, 90vw);
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(99, 102, 241, 0.1);
    animation: slideUp 0.25s ease-out;
    overflow: hidden;
}

.info-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px 14px;
    border-bottom: 1px solid var(--border);
}

.info-modal-header h2 {
    font-size: 18px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.info-close-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 6px;
    transition: all var(--transition);
    line-height: 1;
}

.info-close-btn:hover {
    color: var(--text-primary);
    background: rgba(244, 63, 94, 0.1);
    border-color: rgba(244, 63, 94, 0.3);
}

/* ---- Info Tabs ---- */

.info-tabs {
    display: flex;
    gap: 4px;
    padding: 10px 24px 0;
    border-bottom: 1px solid var(--border);
}

.info-tab {
    padding: 8px 18px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: -1px;
}

.info-tab:hover {
    color: var(--text-secondary);
}

.info-tab.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

/* ---- Tab Content ---- */

.info-tab-content {
    display: none;
    overflow-y: auto;
    padding: 16px 24px 24px;
    flex: 1;
}

.info-tab-content.active {
    display: block;
}

.info-tab-content::-webkit-scrollbar {
    width: 5px;
}

.info-tab-content::-webkit-scrollbar-track {
    background: transparent;
}

.info-tab-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ---- Info Sections ---- */

.info-section {
    margin-bottom: 20px;
}

.info-section:last-child {
    margin-bottom: 0;
}

.info-section h3 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

/* ---- Info Cards ---- */

.info-card {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid rgba(99, 102, 241, 0.08);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 8px;
    transition: all var(--transition);
}

.info-card:last-child {
    margin-bottom: 0;
}

.info-card:hover {
    border-color: rgba(99, 102, 241, 0.18);
    background: rgba(30, 41, 59, 0.7);
}

.info-card h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: 6px;
}

.info-card p {
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.info-card ul {
    list-style: none;
    padding: 0;
    margin: 4px 0 0;
}

.info-card ul li {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
    padding: 4px 0 4px 14px;
    position: relative;
}

.info-card ul li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--accent-indigo);
    font-weight: 700;
}

.info-card ul li strong {
    color: var(--accent-cyan);
}

.info-card em {
    color: var(--accent-amber);
    font-style: normal;
}

/* ---- How-to Steps ---- */

.howto-steps {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.howto-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 10px 14px;
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(99, 102, 241, 0.06);
    border-radius: 10px;
    transition: all var(--transition);
}

.howto-step:hover {
    border-color: rgba(99, 102, 241, 0.15);
    background: rgba(30, 41, 59, 0.6);
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    margin-top: 2px;
}

.howto-step strong {
    display: block;
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.howto-step p {
    font-size: 12px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0;
}

/* ---- Ionogram Panel ---- */

.ionogram-panel {
    position: absolute;
    bottom: 12px;
    left: 12px;
    width: min(420px, 50vw);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 20;
    overflow: hidden;
}

.ionogram-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
}

#ionogram-canvas {
    width: 100%;
    height: 200px;
    display: block;
}

/* ---- MUF/LUF ---- */

.muf-luf-section {
    margin-top: 10px;
}

.muf-luf-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.25);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}

.muf-luf-button:hover {
    background: rgba(245, 158, 11, 0.18);
    border-color: rgba(245, 158, 11, 0.4);
}

.muf-luf-button.loading {
    opacity: 0.6;
    pointer-events: none;
}

.muf-luf-results {
    margin-top: 8px;
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
}

.muf-luf-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3px 0;
}

.muf-label,
.luf-label,
.ouf-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.muf-label {
    color: #f43f5e;
}

.luf-label {
    color: #06b6d4;
}

.ouf-label {
    color: #10b981;
}

.muf-value,
.luf-value,
.owf-value {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ---- IRI Model ---- */

.iri-section {
    margin-bottom: 12px;
}

.iri-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 10px;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 600;
    color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}

.iri-toggle-btn:hover {
    background: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.35);
}

.iri-toggle-btn.active {
    background: rgba(6, 182, 212, 0.18);
    border-color: var(--accent-cyan);
}

.iri-controls {
    margin-top: 8px;
    padding: 8px;
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.iri-row {
    display: flex;
    gap: 8px;
    margin-bottom: 6px;
}

.iri-row:last-child {
    margin-bottom: 0;
}

.iri-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.iri-field span {
    font-size: 9px;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.iri-field input[type="number"],
.iri-field input[type="date"],
.iri-field input[type="time"] {
    width: 100%;
    padding: 4px 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    outline: none;
}

.iri-field input:focus {
    border-color: var(--accent-cyan);
}

.iri-field.iri-full {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
}

.iri-field.iri-full input[type="range"] {
    flex: 1;
}

.iri-field.iri-full output {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent-cyan);
    min-width: 30px;
    text-align: right;
}

.iri-calc-btn {
    width: 100%;
    margin-top: 6px;
    padding: 6px 10px;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--gradient-primary);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
}

.iri-calc-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* ---- Absorption Legend ---- */

.absorption-legend {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    z-index: 10;
}

.absorption-legend-title {
    font-size: 8px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 3px;
}

.absorption-legend-bar {
    width: 80px;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, #10b981, #f59e0b, #f43f5e);
}

.absorption-legend-labels {
    display: flex;
    justify-content: space-between;
    font-size: 7px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ---- Zoom Rect ---- */

.view-btn.zoom-rect-active {
    background: rgba(99, 102, 241, 0.3);
    border-color: var(--accent-indigo);
    color: var(--accent-indigo);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.3);
}

canvas.zoom-rect-cursor {
    cursor: crosshair !important;
}

/* ---- Screenshot Dropdown ---- */

.screenshot-dropdown {
    position: relative;
}

.screenshot-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 4px;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    z-index: 20;
    min-width: 130px;
    backdrop-filter: blur(8px);
}

.screenshot-dropdown.open .screenshot-menu {
    display: block;
}

.screenshot-option {
    display: block;
    width: 100%;
    padding: 6px 10px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 11px;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s;
}

.screenshot-option:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
}

/* ---- Ionosphere Key ---- */

.iono-key {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 10px;
    z-index: 15;
    backdrop-filter: blur(8px);
}

.iono-key-title {
    font-size: 9px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.iono-key-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 2px 0;
    font-size: 10px;
    color: var(--text-muted);
    cursor: help;
}

.iono-swatch {
    width: 14px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
}

.iono-swatch-line {
    width: 14px;
    height: 0;
    border-top: 2px dashed rgba(99, 102, 241, 0.5);
    flex-shrink: 0;
}

.iono-info {
    font-size: 9px;
    color: var(--text-muted);
    opacity: 0.4;
    margin-left: auto;
    transition: opacity 0.15s;
}

.iono-key-item:hover .iono-info {
    opacity: 1;
    color: var(--accent-indigo);
}