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

:root {
    --bg-primary:    #0d0d1a;
    --bg-secondary:  #13132a;
    --bg-card:       #1a1a35;
    --bg-card-hover: #1f1f40;
    --bg-input:      #0d0d1a;
    --border:        #2a2a55;
    --border-focus:  #5555cc;
    --text-primary:  #e0e0ff;
    --text-secondary:#8888bb;
    --text-hint:     #555588;
    --accent:        #5555ff;
    --accent-hover:  #7777ff;
    --danger:        #ff3333;
    --warning:       #ffaa00;
    --success:       #33cc66;

    --slot-0: #4CAF50;
    --slot-1: #2196F3;
    --slot-2: #FF9800;
    --slot-3: #E91E63;

    --slot-0-dim: rgba(76,175,80,0.18);
    --slot-1-dim: rgba(33,150,243,0.18);
    --slot-2-dim: rgba(255,152,0,0.18);
    --slot-3-dim: rgba(233,30,99,0.18);
}

html, body {
    height: 100%;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

/* ===== Header ===== */
header {
    text-align: center;
    margin-bottom: 28px;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text-primary);
}

.version {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-hint);
    vertical-align: super;
    margin-left: 6px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 6px;
}

/* ===== Groupbox ===== */
.groupbox {
    border: 1px solid var(--border);
    padding: 0;
    margin-bottom: 24px;
    background: var(--bg-secondary);
    position: relative;
}

.groupbox-title {
    position: absolute;
    top: -11px;
    left: 16px;
    background: var(--bg-secondary);
    padding: 0 8px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.groupbox-content {
    padding: 18px 20px 14px;
}

/* ===== Size Selector ===== */
.size-selector {
    display: flex;
    align-items: center;
    gap: 28px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-primary);
    user-select: none;
}

.radio-label input[type="radio"] {
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.size-info {
    margin-left: auto;
    font-size: 0.82rem;
    color: var(--text-hint);
    font-family: 'Courier New', monospace;
}

/* ===== Slots Grid ===== */
.slots-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

/* ===== Slot Card ===== */
.slot-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: border-color 0.2s;
}

.slot-card:hover {
    border-color: var(--border-focus);
}

/* Slot header color bars */
.slot-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.slot-color-0 { background: var(--slot-0-dim); border-bottom: 2px solid var(--slot-0); color: var(--slot-0); }
.slot-color-1 { background: var(--slot-1-dim); border-bottom: 2px solid var(--slot-1); color: var(--slot-1); }
.slot-color-2 { background: var(--slot-2-dim); border-bottom: 2px solid var(--slot-2); color: var(--slot-2); }
.slot-color-3 { background: var(--slot-3-dim); border-bottom: 2px solid var(--slot-3); color: var(--slot-3); }

.slot-clear-btn {
    background: none;
    border: 1px solid currentColor;
    color: inherit;
    width: 22px;
    height: 22px;
    font-size: 0.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.15s, background 0.15s;
    line-height: 1;
}

.slot-clear-btn:hover {
    opacity: 1;
    background: rgba(255,255,255,0.1);
}

/* ===== Drop Zone ===== */
.drop-zone {
    border: 2px dashed var(--border);
    margin: 12px;
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    min-height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: rgba(85,85,255,0.06);
}

.drop-zone.drag-over {
    border-style: solid;
}

.drop-zone-content {
    pointer-events: none;
}

.drop-icon {
    width: 32px;
    height: 32px;
    color: var(--text-hint);
    margin-bottom: 8px;
}

.drop-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.drop-hint {
    font-size: 0.75rem;
    color: var(--text-hint);
}

/* ===== File Info Panel ===== */
.file-info {
    padding: 4px 14px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.83rem;
}

.info-label {
    color: var(--text-secondary);
    min-width: 72px;
    flex-shrink: 0;
}

.info-value {
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.82rem;
    word-break: break-all;
}

.offset-input {
    background: var(--bg-input);
    border: 1px solid var(--border-focus);
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.82rem;
    padding: 3px 8px;
    width: 130px;
    outline: none;
    transition: border-color 0.15s;
}

.offset-input:focus {
    border-color: var(--accent-hover);
    box-shadow: 0 0 0 2px rgba(85,85,255,0.2);
}

.offset-input.invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 2px rgba(255,51,51,0.2);
}

/* Warning row */
.warning-row {
    margin-top: 2px;
}

.warning-text {
    font-size: 0.78rem;
    color: var(--danger);
    font-weight: 600;
}

/* ===== Minimap Section ===== */
.minimap-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 18px 20px;
    margin-bottom: 24px;
}

.minimap-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.minimap-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.minimap-hint {
    font-size: 0.8rem;
    color: var(--text-hint);
}

.expand-btn {
    margin-left: auto;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.78rem;
    padding: 3px 10px;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.expand-btn:hover {
    border-color: var(--border-focus);
    color: var(--text-primary);
}

.expand-btn.active {
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== Enlarged Byte View ===== */
.enlarged-section {
    margin-top: 16px;
    border-top: 1px solid var(--border);
    padding-top: 14px;
}

.enlarged-header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
}

.enlarged-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    flex-shrink: 0;
}

.enlarged-hint {
    font-size: 0.75rem;
    color: var(--text-hint);
    flex: 1;
    min-width: 0;
}

.enlarged-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    margin-left: auto;
}

.enlarged-ctrl-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.enlarged-select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.78rem;
    font-family: 'Courier New', monospace;
    padding: 3px 6px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
    appearance: none;
    -webkit-appearance: none;
    padding-right: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238888bb'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 5px center;
}

.enlarged-select:hover,
.enlarged-select:focus {
    border-color: var(--border-focus);
}

.enlarged-canvas-wrap {
    overflow-x: auto;
    overflow-y: auto;
    max-height: 480px;
    border: 1px solid var(--border);
    background: #000;
    cursor: crosshair;
}

#enlargedMap {
    display: block;
    image-rendering: pixelated;
}

.enlarged-status {
    margin-top: 8px;
    padding: 6px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-size: 0.8rem;
    font-family: 'Courier New', monospace;
    color: var(--text-secondary);
    min-height: 32px;
}

.minimap-wrapper {
    position: relative;
}

.minimap-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    font-family: 'Courier New', monospace;
    color: var(--text-hint);
    margin-bottom: 4px;
}

#minimap {
    display: block;
    width: 100%;
    height: 64px;
    border: 1px solid var(--border);
    cursor: crosshair;
    image-rendering: pixelated;
}

.minimap-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

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

.slot-color-0-bg { background: var(--slot-0); }
.slot-color-1-bg { background: var(--slot-1); }
.slot-color-2-bg { background: var(--slot-2); }
.slot-color-3-bg { background: var(--slot-3); }

/* Minimap tooltip */
.minimap-tooltip {
    position: fixed;
    background: #1a1a35ee;
    border: 1px solid var(--border-focus);
    padding: 6px 10px;
    font-size: 0.78rem;
    font-family: 'Courier New', monospace;
    color: var(--text-primary);
    pointer-events: none;
    z-index: 100;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}

/* ===== Action Bar ===== */
.action-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.action-options {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--text-secondary);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--accent);
    width: 15px;
    height: 15px;
    cursor: pointer;
}

.action-opt-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.action-opt-input {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.82rem;
    padding: 3px 8px;
    width: 72px;
    outline: none;
    transition: border-color 0.15s;
}

.action-opt-input.action-opt-name {
    width: 130px;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

.action-opt-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(85,85,255,0.2);
}

.action-opt-input.invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 2px rgba(255,51,51,0.2);
}

.action-btn {
    padding: 10px 24px;
    border: none;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s, transform 0.1s;
    letter-spacing: 0.02em;
}

.action-btn:active:not(:disabled) {
    transform: scale(0.97);
}

.action-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.download-bin {
    background: var(--slot-0);
    color: #fff;
}

.download-bin:hover:not(:disabled) {
    background: #66bb6a;
}

.download-hex {
    background: var(--slot-1);
    color: #fff;
}

.download-hex:hover:not(:disabled) {
    background: #42a5f5;
}

.action-info {
    font-size: 0.82rem;
    color: var(--text-hint);
    margin-left: 4px;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-focus);
}