:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface2: #222533;
    --border: #2d3140;
    --text: #e1e4ed;
    --text2: #9ca3b4;
    --accent: #6c8cff;
    --green: #4ade80;
    --yellow: #fbbf24;
    --red: #f87171;
    --purple: #c084fc;
    --cyan: #22d3ee;
    --orange: #fb923c;
    --pink: #f472b6;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 16px;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(108, 140, 255, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(34, 211, 238, 0.04) 0%, transparent 50%);
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 24px;
    padding-top: 16px;
}

header h1 {
    font-size: clamp(1.4rem, 4vw, 2rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text2);
    font-size: clamp(0.8rem, 2vw, 0.95rem);
}

/* Input Section */
.input-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: clamp(16px, 3vw, 24px);
    margin-bottom: 20px;
}

.input-section label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    color: var(--text2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

#hexInput {
    width: 100%;
    padding: clamp(10px, 2vw, 14px) 50px clamp(10px, 2vw, 14px) 14px;
    background: var(--surface2);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text);
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: clamp(0.85rem, 2vw, 1.05rem);
    letter-spacing: 1px;
    transition: all 0.2s;
}

#hexInput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(108, 140, 255, 0.15);
}

#hexInput::placeholder {
    color: #555;
    letter-spacing: 0;
    font-size: clamp(0.7rem, 1.8vw, 0.9rem);
}

.input-status {
    position: absolute;
    right: 14px;
    font-size: 1.2rem;
    pointer-events: none;
}

.hint {
    color: var(--text2);
    font-size: clamp(0.7rem, 1.5vw, 0.8rem);
    margin-top: 6px;
    opacity: 0.7;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: clamp(40px, 8vw, 60px) 16px;
    color: var(--text2);
}

.empty-icon {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-state p:first-of-type {
    font-size: clamp(1rem, 2.5vw, 1.1rem);
}

/* Parsed Section */
.parsed-section h2 {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    margin-bottom: 12px;
    color: var(--text);
    font-weight: 600;
}

/* Bitmap Container */
.bitmap-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: clamp(12px, 2.5vw, 20px);
    margin-bottom: 24px;
}

/* Bitmap */
.bitmap {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(4px, 1vw, 8px);
    justify-content: center;
    margin-bottom: 16px;
}

.byte-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
}

.byte-label {
    font-size: clamp(0.6rem, 1.3vw, 0.7rem);
    color: var(--text2);
    font-weight: 500;
}

.byte-cell {
    width: clamp(38px, 8vw, 54px);
    height: clamp(38px, 8vw, 54px);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-weight: 700;
    font-size: clamp(0.75rem, 1.8vw, 1rem);
    color: #fff;
    transition: all 0.2s;
}

/* Byte cell colors */
.byte-cell.bytes-reserved { background: #3b3f55; }
.byte-cell.bytes-locker { background: var(--accent); color: #fff; }
.byte-cell.bytes-tariff { background: var(--purple); }
.byte-cell.bytes-status { background: var(--green); color: #000; }
.byte-cell.bytes-counter { background: var(--orange); }

/* Bitmap Legend */
.bitmap-legend {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(10px, 2vw, 20px);
    justify-content: center;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: clamp(0.7rem, 1.4vw, 0.82rem);
    color: var(--text2);
}

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

.legend-color.color-reserved { background: #3b3f55; }
.legend-color.color-locker { background: var(--accent); }
.legend-color.color-tariff { background: var(--purple); }
.legend-color.color-status { background: var(--green); }
.legend-color.color-counter { background: var(--orange); }

/* Decode Table */
.decode-table {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.decode-row {
    display: flex;
    align-items: center;
    padding: clamp(10px, 2vw, 14px) clamp(12px, 2.5vw, 20px);
    border-bottom: 1px solid var(--border);
    gap: clamp(8px, 1.5vw, 16px);
    transition: background 0.15s;
}

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

.decode-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.row-bytes {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-weight: 700;
    font-size: clamp(0.7rem, 1.5vw, 0.85rem);
    color: var(--accent);
    min-width: clamp(50px, 10vw, 65px);
    padding: 3px 8px;
    background: rgba(108, 140, 255, 0.1);
    border-radius: 6px;
    text-align: center;
    flex-shrink: 0;
}

.row-name {
    font-weight: 600;
    font-size: clamp(0.8rem, 1.8vw, 0.95rem);
    color: var(--text);
    min-width: clamp(100px, 20vw, 160px);
    flex-shrink: 0;
}

.row-value {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-weight: 600;
    font-size: clamp(0.8rem, 1.8vw, 1rem);
    flex: 1;
    word-break: break-all;
    min-width: 0;
}

.row-certainty {
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    min-width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.row-comment {
    font-size: clamp(0.7rem, 1.3vw, 0.82rem);
    color: var(--text2);
    font-style: italic;
    flex-shrink: 0;
    text-align: right;
    max-width: clamp(120px, 25vw, 220px);
}

/* Value colors */
.row-value.confirmed { color: var(--green); }
.row-value.partial { color: var(--yellow); }
.row-value.unknown { color: var(--text2); }

/* Certainty colors */
.certainty-confirmed { color: var(--green); }
.certainty-partial { color: var(--yellow); }
.certainty-unknown { color: var(--text2); }

/* Footer */
footer {
    text-align: center;
    color: var(--text2);
    font-size: clamp(0.7rem, 1.3vw, 0.78rem);
    margin-top: 32px;
    padding: 16px;
    opacity: 0.5;
}

/* Mobile-specific adjustments */
@media (max-width: 640px) {
    body {
        padding: 10px;
    }
    
    .container {
        max-width: 100%;
    }
    
    .decode-row {
        flex-wrap: wrap;
        gap: 4px 10px;
        padding: 12px 10px;
    }
    
    .row-comment {
        max-width: 100%;
        text-align: left;
        width: 100%;
        margin-top: 4px;
    }
    
    .row-bytes, .row-name {
        min-width: auto;
    }
    
    .row-name {
        order: 1;
    }
    
    .row-bytes {
        order: 0;
    }
    
    .row-value {
        order: 2;
        width: 100%;
        margin-top: 2px;
    }
    
    .row-certainty {
        order: 3;
    }
    
    .row-comment {
        order: 4;
    }
    
    .bitmap {
        gap: 4px;
    }
    
    .byte-cell {
        width: 36px;
        height: 36px;
        font-size: 0.7rem;
        border-radius: 8px;
    }
    
    .byte-label {
        font-size: 0.6rem;
    }
    
    .bitmap-legend {
        gap: 8px;
    }
    
    .legend-item {
        font-size: 0.7rem;
        gap: 4px;
    }
}

/* Desktop optimizations */
@media (min-width: 1024px) {
    body {
        padding: 32px;
    }
    
    .container {
        max-width: 960px;
    }
    
    .byte-cell {
        width: 56px;
        height: 56px;
        font-size: 1rem;
    }
    
    .decode-row {
        padding: 16px 24px;
    }
}