/* HMC472A Attenuator Web UI - PCB Green Theme */

:root {
    --bg: #131009;
    --bg-elevated: #1a1610;
    --bg-card: #221e17;
    --accent-green: #3aaa62;
    --accent-green-dim: #2d8a4e;
    --accent-green-glow: rgba(58, 170, 98, 0.3);
    --accent-gold: #dbb960;
    --accent-gold-dim: #b39a4d;
    --accent-gold-glow: rgba(219, 185, 96, 0.3);
    --text: #e8e2d6;
    --text-dim: #9a9488;
    --text-muted: #6a645a;
    --border: #3a352c;
    --error: #d64545;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 1rem;
}

/* Header */
header {
    text-align: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

header h1 {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--accent-green);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

header h1 .icon {
    width: 1.5rem;
    height: 1.5rem;
}

.subtitle {
    color: var(--text-dim);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Sections */
section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

section h2 {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

/* dB Display */
.display-section {
    text-align: center;
    background: var(--bg);
    border-color: var(--accent-green-dim);
}

.db-display {
    font-family: var(--font-mono);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent-green);
    text-shadow: 0 0 20px var(--accent-green-glow);
    line-height: 1;
    padding: 0.5rem 0;
}

.db-display .db-unit {
    font-size: 1.5rem;
    color: var(--text-dim);
    margin-left: 0.25rem;
}

.step-display {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-dim);
}

/* Slider */
.slider-section {
    padding: 1.25rem 1rem;
}

#db-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--bg);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}

#db-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: var(--accent-green);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-green-glow);
    transition: transform 0.1s ease;
}

#db-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

#db-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--accent-green);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-green-glow);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Preset Buttons */
.preset-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.preset-btn {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: 0.75rem 0.5rem;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.preset-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-green-dim);
}

.preset-btn:active,
.preset-btn.active {
    background: var(--accent-green-dim);
    border-color: var(--accent-green);
    color: var(--bg);
}

/* Pin Visualization */
.pin-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
}

.pin {
    text-align: center;
    padding: 0.5rem 0.25rem;
    background: var(--bg);
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all 0.15s ease;
}

.pin-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    margin: 0 auto 0.375rem;
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green-glow);
    transition: all 0.15s ease;
}

.pin.low .pin-indicator {
    background: var(--accent-gold);
    box-shadow: 0 0 8px var(--accent-gold-glow);
}

.pin-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
}

.pin-db {
    font-size: 0.625rem;
    color: var(--text-muted);
}

.pin-legend {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.75rem;
    color: var(--text-dim);
}

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

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

.legend-dot.low {
    background: var(--accent-gold);
}

/* Sweep Controls */
.sweep-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.sweep-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    padding: 0.625rem 0.75rem;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sweep-btn .icon {
    width: 16px;
    height: 16px;
}

.sweep-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-green-dim);
}

.sweep-btn.active {
    background: var(--accent-green-dim);
    border-color: var(--accent-green);
    color: var(--bg);
}

.sweep-btn.stop:hover {
    border-color: var(--error);
}

.sweep-config {
    display: flex;
    justify-content: center;
}

.sweep-config label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-dim);
}

.sweep-config input {
    width: 80px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: 0.375rem 0.5rem;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    text-align: center;
}

.sweep-config input:focus {
    outline: none;
    border-color: var(--accent-green-dim);
}

.sweep-status {
    text-align: center;
    font-size: 0.75rem;
    color: var(--accent-gold);
    min-height: 1.25rem;
    margin-top: 0.5rem;
}

/* Footer */
footer {
    padding: 1rem 0;
    border-top: 1px solid var(--border);
    margin-top: 0.5rem;
}

.status-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.ota-section {
    text-align: center;
    margin-top: 0.75rem;
}

.ota-btn {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.ota-btn:hover {
    color: var(--text);
    border-color: var(--text-dim);
}

.ota-btn.enabled {
    color: var(--accent-green);
    border-color: var(--accent-green-dim);
}

/* Icons */
.icon {
    width: 1em;
    height: 1em;
    vertical-align: middle;
}

/* Responsive */
@media (max-width: 400px) {
    .preset-buttons {
        grid-template-columns: repeat(2, 1fr);
    }

    .pin-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .db-display {
        font-size: 2.75rem;
    }
}