/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
    /* Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #0f172a;
    --border-subtle: #334155;
    --border-focus: #3b82f6;

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-heading: #ffffff;

    --accent-green: #10b981;
    --accent-green-dim: rgba(16, 185, 129, 0.1);
    --accent-purple: #3b82f6;
    --accent-purple-dim: rgba(59, 130, 246, 0.1);
    --accent-cyan: #0ea5e9;
    --accent-cyan-dim: rgba(14, 165, 233, 0.1);
    --accent-amber: #f59e0b;
    --accent-amber-dim: rgba(245, 158, 11, 0.1);
    --accent-red: #ef4444;
    --accent-red-dim: rgba(239, 68, 68, 0.1);

    --gradient-main: #3b82f6;
    --gradient-card: transparent;
    --gradient-success: #10b981;
    --gradient-warning: #f59e0b;
    --gradient-danger: #ef4444;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-glow-green: none;
    --shadow-glow-purple: none;

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

    /* Spacing & Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 10px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}



/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 24px;
    align-items: start;
}

@media (max-width: 1100px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   HEADER
   ============================================ */
.header {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
}

.logo-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 400;
}

.header-version {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* ============================================
   STATUS BAR
   ============================================ */
.status-bar {
    padding: 12px 0;
    text-align: center;
}

.status-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.status-text.processing {
    color: var(--accent-purple);
}

.status-text.completed {
    color: var(--accent-green);
}

/* ============================================
   PANELS
   ============================================ */
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.panel-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.panel-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-body {
    padding: 20px 24px;
}

.panel-input {
    position: sticky;
    top: 90px;
}

@media (max-width: 1100px) {
    .panel-input {
        position: static;
    }
}

/* ============================================
   INPUT SECTIONS
   ============================================ */
.input-section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-subtle);
}

.input-section:last-of-type {
    border-bottom: none;
}

.input-section-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.dot-green {
    background: var(--accent-green);
}

.dot-purple {
    background: var(--accent-purple);
}

.dot-cyan {
    background: var(--accent-cyan);
}

.dot-amber {
    background: var(--accent-amber);
}

.input-group {
    margin-bottom: 12px;
}

.input-group label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.input-group input[type="number"],
.input-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.88rem;
    transition: var(--transition-fast);
    outline: none;
}

.input-group input[type="number"]:focus,
.input-group textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.1);
}

.input-group textarea {
    resize: vertical;
    font-size: 0.82rem;
}

.input-hint {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Range slider */
.input-group input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-subtle);
    border-radius: 100px;
    outline: none;
    cursor: pointer;
}

.input-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-purple);
    cursor: pointer;
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.range-value {
    font-weight: 600;
    color: var(--accent-purple);
    font-family: var(--font-mono);
}

/* Select Input */
.select-input {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    color: var(--text-body);
    font-family: var(--font-primary);
    font-size: 0.82rem;
    outline: none;
    transition: var(--transition-fast);
    cursor: pointer;
    -webkit-appearance: none;
    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 4.5l3 3 3-3' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.select-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px var(--accent-green-dim);
}

.select-input optgroup {
    font-weight: 700;
    color: var(--text-heading);
}

/* Profile Summary */
.profile-summary {
    margin-top: 6px;
}

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

.profile-desc {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.profile-specs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.profile-specs span {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    padding: 2px 7px;
    border-radius: 3px;
    background: rgba(110, 231, 183, 0.08);
    color: var(--accent-green);
    border: 1px solid rgba(110, 231, 183, 0.15);
}

/* Regulation Info */
.regulation-info {
    display: flex;
    gap: 8px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.reg-badge {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(129, 140, 248, 0.08);
    color: var(--accent-purple);
    border: 1px solid rgba(129, 140, 248, 0.15);
    transition: var(--transition-fast);
}

.reg-badge.reg-clamped {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.25);
}

.reg-warn {
    font-size: 0.6rem;
    color: #f59e0b;
}

/* Quick Summary Panel */
.quick-summary {
    background: rgba(110, 231, 183, 0.04);
    border: 1px solid rgba(110, 231, 183, 0.12);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    margin-bottom: 10px;
}

.qs-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3px 0;
    font-size: 0.72rem;
}

.qs-row span {
    color: var(--text-muted);
}

.qs-row strong {
    font-family: var(--font-mono);
    color: var(--text-heading);
    font-size: 0.75rem;
}

/* Advanced Toggle */
.advanced-toggle {
    margin-bottom: 8px;
}

.advanced-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px dashed var(--border-subtle);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-size: 0.72rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.advanced-toggle-btn:hover {
    border-color: var(--accent-purple);
    color: var(--text-secondary);
    background: rgba(129, 140, 248, 0.04);
}

.advanced-toggle-btn.open {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    border-style: solid;
    background: rgba(129, 140, 248, 0.05);
}

.advanced-chevron {
    transition: transform 0.25s ease;
    flex-shrink: 0;
}

.adv-count {
    margin-left: auto;
    font-size: 0.6rem;
    font-family: var(--font-mono);
    opacity: 0.5;
}

/* Advanced Params Container */
.advanced-params {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 12px;
    margin-bottom: 12px;
    background: rgba(15, 23, 42, 0.3);
}

/* 2-Column Input Row */
.input-row-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* Compact Input Sections */
.input-section-compact {
    margin-bottom: 8px;
    padding-bottom: 8px;
}

.input-section-compact .input-group {
    margin-bottom: 6px;
}

.input-section-title-sm {
    font-size: 0.72rem !important;
    margin-bottom: 6px !important;
}

/* Compact range slider */
.range-compact {
    display: flex;
    align-items: center;
    gap: 8px;
}

.range-compact input[type="range"] {
    flex: 1;
    height: 4px;
}

.range-val {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-purple);
    min-width: 32px;
    text-align: right;
}

/* Auto Badge Small */
.auto-badge-sm {
    font-size: 0.55rem;
    padding: 1px 5px;
    border-radius: 3px;
    background: rgba(251, 191, 36, 0.15);
    color: var(--accent-amber);
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-left: auto;
    flex-shrink: 0;
}

/* Auto Terrain Display */
.auto-terrain-display {
    margin-top: 0;
}

.auto-terrain-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    transition: var(--transition-normal);
}

.auto-terrain-card.detected {
    border-color: var(--accent-amber);
    background: var(--accent-amber-dim);
}

.auto-terrain-icon {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: var(--transition-normal);
}

.auto-terrain-card.detected .auto-terrain-icon {
    color: var(--accent-amber);
}

.auto-terrain-type {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.2;
}

.auto-terrain-card.detected .auto-terrain-type {
    color: var(--accent-amber);
}

.auto-terrain-detail {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 1px;
}

/* Signal radar pulse on map */
.signal-radar-ring {
    border-radius: 50%;
    pointer-events: none;
}

@keyframes radarPulse {
    0% {
        opacity: 0.6;
        transform: scale(0.95);
    }

    50% {
        opacity: 0.3;
    }

    100% {
        opacity: 0.6;
        transform: scale(1);
    }
}

/* Coverage legend on map */
.coverage-legend {
    position: absolute;
    bottom: 12px;
    left: 12px;
    z-index: 1000;
    background: rgba(15, 20, 40, 0.9);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    display: none;
}

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

.coverage-legend h4 {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 6px;
}

.coverage-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.68rem;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.coverage-legend-item:last-child {
    margin-bottom: 0;
}

.coverage-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.coverage-pct {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-muted);
    margin-left: 4px;
}

.coverage-legend-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 6px 0;
}

.coverage-legend-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.65rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.coverage-legend-stat strong {
    font-family: var(--font-mono);
    color: var(--text-heading);
    font-size: 0.68rem;
}

/* Coverage Loading Overlay */
.coverage-loading {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 18, 36, 0.92);
    border: 1px solid rgba(96, 165, 250, 0.25);
    border-radius: 8px;
    padding: 8px 16px;
    color: #e2e8f0;
    font-size: 0.72rem;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    white-space: nowrap;
}

.coverage-loading.visible {
    opacity: 1;
}

.cov-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(96, 165, 250, 0.2);
    border-top: 2px solid #60a5fa;
    border-radius: 50%;
    animation: covSpin 0.7s linear infinite;
}

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

/* Data Source Badges */
.cov-badge {
    font-size: 0.55rem;
    padding: 1px 5px;
    border-radius: 3px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    vertical-align: middle;
    margin-left: 4px;
}

.cov-badge-real {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.cov-badge-synth {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.btn-calculate {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--accent-purple);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-top: 8px;
}

.btn-calculate:hover {
    background: #4f5fe6;
}

.btn-calculate:active {
    background: #3b4cd0;
}

/* Export PDF Button */
.btn-export-pdf {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid rgba(110, 231, 183, 0.3);
    border-radius: var(--radius-sm);
    background: rgba(110, 231, 183, 0.08);
    color: var(--accent-green);
    font-family: var(--font-primary);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.btn-export-pdf:hover {
    background: rgba(110, 231, 183, 0.15);
    border-color: var(--accent-green);
}

.btn-export-pdf:active {
    transform: scale(0.97);
}

.btn-export-pdf.exporting {
    opacity: 0.7;
    pointer-events: none;
}

.btn-export-pdf.exporting svg {
    animation: covSpin 0.7s linear infinite;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ============================================
   RESULTS PLACEHOLDER
   ============================================ */
.results-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.placeholder-icon {
    margin-bottom: 20px;
    opacity: 0.5;
}

.results-placeholder p {
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ============================================
   RESULT CARDS
   ============================================ */
.result-card {
    margin-bottom: 20px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: rgba(10, 14, 30, 0.4);
}

.result-card-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--gradient-card);
}

.result-card-header h3 {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-heading);
}

.result-step-badge {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(100, 116, 139, 0.15);
    color: var(--text-muted);
    white-space: nowrap;
}

.result-card-body {
    padding: 20px;
}

/* Canvas */
canvas {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    background: rgba(5, 8, 18, 0.6);
    display: block;
}

/* Terrain Stats */
.terrain-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.stat-item {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
}

.stat-label {
    font-size: 0.68rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-heading);
    margin-top: 2px;
}

.stat-value.green {
    color: var(--accent-green);
}

.stat-value.purple {
    color: var(--accent-purple);
}

.stat-value.cyan {
    color: var(--accent-cyan);
}

.stat-value.amber {
    color: var(--accent-amber);
}

/* Curvature Info */
.curvature-info {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 10px;
}

/* Propagation Modes */
.propagation-modes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

@media (max-width: 600px) {
    .propagation-modes {
        grid-template-columns: 1fr;
    }
}

.mode-card {
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    text-align: center;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.mode-card.active-mode {
    border-color: var(--accent-green);
    background: var(--accent-green-dim);
}

.mode-card.active-mode::after {
    content: '✓ AKTIF';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--accent-green);
    letter-spacing: 0.05em;
}

.mode-card h4 {
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.mode-card p {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.mode-card.active-mode h4 {
    color: var(--accent-green);
}

/* Fresnel Info */
.fresnel-info {
    margin-bottom: 12px;
}

.fresnel-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.82rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.fresnel-detail:last-child {
    border-bottom: none;
}

.fresnel-detail strong {
    color: var(--text-heading);
    font-family: var(--font-mono);
    font-weight: 600;
}

/* Loss Breakdown */
.loss-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.loss-item {
    padding: 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
}

.loss-item-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}

.loss-item-value {
    font-size: 1.3rem;
    font-weight: 800;
    font-family: var(--font-mono);
}

.loss-item-desc {
    font-size: 0.68rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Loss Bar Chart */
.loss-bar-chart {
    margin-top: 4px;
}

.loss-bar-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.loss-bar-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    width: 100px;
    flex-shrink: 0;
    text-align: right;
}

.loss-bar-track {
    flex: 1;
    height: 24px;
    background: var(--bg-input);
    border-radius: 100px;
    overflow: hidden;
    position: relative;
}

.loss-bar-fill {
    height: 100%;
    border-radius: 100px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    padding: 0 10px;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--bg-primary);
    white-space: nowrap;
}

.loss-bar-fill.green {
    background: var(--gradient-success);
}

.loss-bar-fill.purple {
    background: linear-gradient(135deg, #818cf8, #a78bfa);
}

.loss-bar-fill.amber {
    background: var(--gradient-warning);
}

.loss-bar-fill.red {
    background: var(--gradient-danger);
}

.loss-bar-fill.cyan {
    background: linear-gradient(135deg, #06b6d4, #67e8f9);
}

/* RSSI Gauge */
.rssi-gauge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
}

.rssi-value {
    font-size: 3.5rem;
    font-weight: 800;
    font-family: var(--font-mono);
    line-height: 1;
    margin-bottom: 4px;
}

.rssi-unit {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.rssi-meter {
    width: 100%;
    max-width: 500px;
    height: 16px;
    background: var(--bg-input);
    border-radius: 100px;
    position: relative;
    overflow: hidden;
    margin-bottom: 8px;
}

.rssi-meter-fill {
    height: 100%;
    border-radius: 100px;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.rssi-meter-labels {
    width: 100%;
    max-width: 500px;
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* Link Budget Table */
.link-budget-table {
    margin-top: 20px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.budget-row {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.82rem;
    transition: var(--transition-fast);
}

.budget-row:last-child {
    border-bottom: none;
}

.budget-row:hover {
    background: rgba(129, 140, 248, 0.04);
}

.budget-row.total-row {
    background: var(--gradient-card);
    font-weight: 700;
}

.budget-label {
    flex: 1;
    color: var(--text-secondary);
}

.budget-op {
    width: 30px;
    text-align: center;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.budget-value {
    width: 120px;
    text-align: right;
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-heading);
}

.total-row .budget-label,
.total-row .budget-value {
    color: var(--text-heading);
}

/* Signal Verdict */
.signal-verdict {
    margin-top: 20px;
    padding: 20px;
    border-radius: var(--radius-md);
    text-align: center;
}

.signal-verdict.good {
    background: var(--accent-green-dim);
    border: 1px solid rgba(110, 231, 183, 0.3);
}

.signal-verdict.marginal {
    background: var(--accent-amber-dim);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

.signal-verdict.bad {
    background: var(--accent-red-dim);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

.verdict-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.verdict-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.signal-verdict.good .verdict-title {
    color: var(--accent-green);
}

.signal-verdict.marginal .verdict-title {
    color: var(--accent-amber);
}

.signal-verdict.bad .verdict-title {
    color: var(--accent-red);
}

.verdict-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   MAP SECTION
   ============================================ */
.map-section {
    margin-bottom: 24px;
}

.map-section .panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.map-instructions {
    display: flex;
    align-items: center;
}

.map-instruction-badge {
    font-size: 0.72rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 4px;
    background: rgba(100, 116, 139, 0.12);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.map-instruction-badge.done {
    background: var(--accent-green-dim);
    color: var(--accent-green);
    border-color: rgba(110, 231, 183, 0.2);
    animation: none;
}

.panel-body-map {
    padding: 16px;
}

.map-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
}

.leaflet-map {
    width: 100%;
    height: 420px;
    z-index: 1;
    background: #0a0e1a;
}

@media (max-width: 700px) {
    .leaflet-map {
        height: 300px;
    }
}

/* Dark-theme overrides for Leaflet controls */
.leaflet-control-zoom a {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-subtle) !important;
}

.leaflet-control-zoom a:hover {
    background: var(--bg-card-hover) !important;
}

.leaflet-control-attribution {
    background: rgba(10, 14, 26, 0.7) !important;
    color: var(--text-muted) !important;
    font-size: 0.6rem !important;
}

.leaflet-control-attribution a {
    color: var(--accent-cyan) !important;
}

.leaflet-popup-content-wrapper {
    background: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-lg) !important;
}

.leaflet-popup-tip {
    background: var(--bg-card) !important;
    border: 1px solid var(--border-subtle) !important;
}

.leaflet-popup-close-button {
    color: var(--text-muted) !important;
}

/* Map Overlay Controls */
.map-overlay-controls {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.map-ctrl-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.map-ctrl-btn:hover {
    background: rgba(20, 28, 55, 0.9);
    color: var(--text-heading);
    border-color: var(--accent-purple);
}

/* Coordinate Display */
.map-coords-display {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 12px;
    margin-top: 14px;
    align-items: stretch;
}

@media (max-width: 700px) {
    .map-coords-display {
        grid-template-columns: 1fr;
    }
}

.coord-card {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    transition: var(--transition-normal);
}

.coord-card.set {
    border-color: rgba(110, 231, 183, 0.2);
}

.coord-card-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
    font-size: 0.72rem;
    color: var(--text-heading);
}

.coord-card-header svg {
    color: var(--accent-cyan);
    flex-shrink: 0;
}

/* Coordinate Inputs */
.coord-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 6px;
    align-items: end;
}

.coord-input-row {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.coord-input-row label {
    font-size: 0.6rem;
    color: var(--text-muted);
    font-weight: 500;
}

.coord-input-row input {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-body);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    outline: none;
    transition: var(--transition-fast);
}

.coord-input-row input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px var(--accent-green-dim);
}

.coord-input-row input::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.coord-input-row input.input-error {
    border-color: #ef4444;
    animation: coordShake 0.3s ease;
}

@keyframes coordShake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-4px);
    }

    75% {
        transform: translateX(4px);
    }
}

.coord-go-btn {
    padding: 6px 8px;
    border: 1px solid var(--accent-green);
    border-radius: 4px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 30px;
}

.coord-go-btn:hover {
    background: rgba(16, 185, 129, 0.2);
}

.coord-rx .coord-go-btn {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    background: rgba(129, 140, 248, 0.1);
}

.coord-rx .coord-go-btn:hover {
    background: rgba(129, 140, 248, 0.2);
}

.coord-values {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.coord-placeholder {
    color: var(--text-muted);
    font-size: 0.72rem;
    font-style: italic;
    font-family: var(--font-primary);
}

.coord-distance {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-width: 80px;
}

.coord-distance .coord-values {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.coord-distance .coord-values .distance-unit {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    display: block;
    margin-top: 2px;
}

/* Auto Badge */
.auto-badge {
    font-size: 0.55rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 100px;
    background: var(--accent-green-dim);
    color: var(--accent-green);
    border: 1px solid rgba(110, 231, 183, 0.2);
    vertical-align: middle;
    margin-left: 4px;
    letter-spacing: 0.08em;
}

/* Signal line on map - custom Leaflet path styling */
.leaflet-signal-line {
    stroke-dasharray: 8 6;
    animation: dashMove 1s linear infinite;
}

@keyframes dashMove {
    to {
        stroke-dashoffset: -14;
    }
}

/* ============================================
   FORMULAS SECTION
   ============================================ */
.formulas-section {
    margin-top: 40px;
    padding-bottom: 40px;
}

.formula-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.formula-card {
    padding: 18px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
}

.formula-card h4 {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
}

.formula-box {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent-cyan);
    background: rgba(5, 8, 18, 0.6);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    overflow-x: auto;
}

.formula-card p {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    text-align: center;
    padding: 30px 24px;
    border-top: 1px solid var(--border-subtle);
    background: rgba(10, 14, 26, 0.6);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.footer-note {
    margin-top: 4px;
    font-size: 0.7rem;
    opacity: 0.7;
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(100, 120, 180, 0.2);
    border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(100, 120, 180, 0.35);
}

/* ============================================
   3D TERRAIN VIEWER
   ============================================ */
.terrain3d-toggle-row {
    margin-top: 10px;
}

.terrain3d-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px dashed var(--border-subtle);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.terrain3d-toggle-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.terrain3d-toggle-btn:not(:disabled):hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.05);
}

.terrain3d-toggle-btn.active {
    border-style: solid;
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.08);
}

.terrain3d-badge {
    margin-left: auto;
    font-size: 0.6rem;
    font-family: var(--font-mono);
    padding: 2px 6px;
    border-radius: 3px;
    background: rgba(100, 116, 139, 0.15);
    color: var(--text-muted);
    font-weight: 500;
}

.terrain3d-toggle-btn.active .terrain3d-badge {
    background: rgba(34, 211, 238, 0.15);
    color: var(--accent-cyan);
}

.terrain3d-container {
    margin-top: 10px;
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.8);
    overflow: hidden;
}

.terrain3d-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-subtle);
}

.terrain3d-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.terrain3d-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.terrain3d-hint {
    font-size: 0.6rem;
    color: var(--text-muted);
}

.terrain3d-reset-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.terrain3d-reset-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.terrain3d-canvas-wrap {
    position: relative;
    width: 100%;
    height: 420px;
    background: #0a1628;
}

.terrain3d-canvas-wrap canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.terrain3d-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: rgba(10, 22, 40, 0.9);
    z-index: 10;
    color: var(--accent-cyan);
    font-size: 0.78rem;
}

.terrain3d-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(34, 211, 238, 0.15);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: covSpin 0.8s linear infinite;
}

.terrain3d-legend {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.65rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.terrain3d-legend-bar {
    height: 8px;
    width: 120px;
    border-radius: 4px;
    background: linear-gradient(90deg, #1a6b3c, #4ade80, #fbbf24, #b45309, #78716c, #ffffff);
}

.terrain3d-legend-labels {
    display: flex;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
}

.terrain3d-legend-stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

.terrain3d-legend-stat strong {
    color: var(--text-heading);
}

/* ============================================
   UTILITIES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}