/* HoverLogic — FPV Drone & LiPo Battery Flight Time Calculator Styles */
:root {
    --bg-primary: #0a0d14;
    --bg-surface: #121722;
    --bg-surface-elevated: #1a2130;
    --bg-hover: #222c40;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-glow: rgba(245, 158, 11, 0.25);
    --accent-cyan: #38bdf8;
    --accent-cyan-glow: rgba(56, 189, 248, 0.2);
    --border: #1e293b;
    --border-highlight: #334155;
    
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.12);
    --success-border: rgba(34, 197, 94, 0.3);
    
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --warning-border: rgba(245, 158, 11, 0.3);
    
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --danger-border: rgba(239, 68, 68, 0.3);

    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(245, 158, 11, 0.08) 0%, transparent 60%),
        linear-gradient(rgba(30, 41, 59, 0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 41, 59, 0.2) 1px, transparent 1px);
    background-size: 100% 100%, 24px 24px, 24px 24px;
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.app-header {
    text-align: center;
    padding: 2.5rem 1rem 1.5rem;
    position: relative;
}

.header-inner {
    max-width: 800px;
    margin: 0 auto;
}

.brand-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.hud-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
    animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.app-header h1 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin: 0 0 0.5rem;
    background: linear-gradient(135deg, #ffffff 30%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin: 0;
}

.app-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem 3rem;
}

.calculator-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Preset Section */
.preset-section {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.preset-header {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.preset-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex: 1;
}

.preset-btn {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.preset-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: var(--bg-hover);
}

.preset-btn.active {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--accent);
    color: var(--accent-light);
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.15);
}

/* Grid Layout */
.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }
}

.calc-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 1.25rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title svg {
    color: var(--accent);
}

/* Form Controls */
.input-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-row.split-2 > * {
    flex: 1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f59e0b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
}

.input-with-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-unit input {
    padding-right: 3.25rem;
}

.unit-tag {
    position: absolute;
    right: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    pointer-events: none;
}

/* Range Sliders */
.range-group {
    background: var(--bg-surface-elevated);
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.range-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.range-value-badge {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent);
    border: 1px solid var(--accent);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
}

.range-value-badge.highlight {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border-highlight);
    border-radius: 3px;
    outline: none;
    margin: 0.75rem 0 0.5rem;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

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

/* Visualizer Card */
.visualizer-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

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

.hud-status-chip {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.hud-status-chip.warning {
    background: var(--warning-bg);
    color: var(--warning);
    border-color: var(--warning-border);
}

.hud-status-chip.danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger-border);
}

.canvas-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0.5rem 0;
}

canvas#dischargeGaugeCanvas {
    max-width: 100%;
    height: auto;
    display: block;
}

.status-banner {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    transition: all 0.3s ease;
}

.status-banner.warning {
    background: var(--warning-bg);
    border-color: var(--warning-border);
}

.status-banner.danger {
    background: var(--danger-bg);
    border-color: var(--danger-border);
}

.status-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.status-text strong {
    display: block;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.status-text p {
    margin: 0.2rem 0 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Results Grid */
.results-section {
    margin-top: 0.5rem;
}

.results-header h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin: 0 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.results-header svg {
    color: var(--accent-cyan);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.result-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: transform 0.2s, border-color 0.2s;
}

.result-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-2px);
}

.result-card.primary-card {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(18, 23, 34, 0.9));
    border-color: var(--accent);
    grid-column: span 2;
}

@media (max-width: 600px) {
    .result-card.primary-card {
        grid-column: span 1;
    }
}

.result-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
}

.result-value {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
}

.result-value.glow-text {
    font-size: 2.4rem;
    color: var(--accent-light);
    text-shadow: 0 0 15px rgba(245, 158, 11, 0.3);
}

.result-sub {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.4rem;
}

/* Breakdown Card */
.sub-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 1rem;
    color: var(--text-primary);
}

.capacity-bar-container {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: 4px;
    border: 1px solid var(--border);
    margin-bottom: 1rem;
}

.capacity-bar {
    height: 28px;
    display: flex;
    border-radius: 4px;
    overflow: hidden;
}

.cap-segment {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    transition: width 0.3s ease;
    white-space: nowrap;
    overflow: hidden;
}

.cap-segment.usable {
    background: linear-gradient(90deg, #38bdf8, #818cf8);
    color: #040814;
}

.cap-segment.reserve {
    background: #ef4444;
    color: #ffffff;
}

.breakdown-meta {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

/* Matrix Table Card */
.table-responsive {
    overflow-x: auto;
}

.matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.matrix-table th {
    background: var(--bg-surface-elevated);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.matrix-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.matrix-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.matrix-table tr.active-row td {
    background: rgba(245, 158, 11, 0.08);
    color: var(--accent-light);
    font-weight: 600;
}

/* Educational SEO Content */
.educational-content {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-top: 1rem;
}

.educational-content h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin: 0 0 1rem;
    color: var(--text-primary);
}

.educational-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
}

.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .edu-grid {
        grid-template-columns: 1fr;
    }
}

.edu-box {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

.edu-box h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin: 0 0 0.75rem;
    color: var(--accent-light);
}

.edu-box p, .edu-box li {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.edu-box ul {
    padding-left: 1.2rem;
    margin: 0.5rem 0;
}

.formula-callout {
    background: var(--bg-primary);
    border: 1px solid var(--border-highlight);
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    margin: 0.75rem 0;
}