/* ===== Green Screen Remover — styles.css ===== */

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

:root {
    --bg: #0f1115;
    --bg-card: #1a1d24;
    --bg-input: #232830;
    --border: #2d333d;
    --text: #e4e6eb;
    --text-dim: #8b9099;
    --text-muted: #6b7079;
    --accent: #4ade80;
    --accent-hover: #22c55e;
    --accent-dim: #166534;
    --danger: #ef4444;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.site-header {
    background: linear-gradient(135deg, #0f1115 0%, #141a21 100%);
    border-bottom: 1px solid var(--border);
    padding: 32px 20px 24px;
    text-align: center;
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
}

.site-header h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--accent);
    text-transform: lowercase;
}

.tagline {
    font-size: clamp(0.85rem, 2.5vw, 1.05rem);
    color: var(--text-dim);
    margin-top: 6px;
}

/* ===== Badges ===== */
.badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    padding: 14px 16px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.badge {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(74, 222, 128, 0.08);
    border: 1px solid rgba(74, 222, 128, 0.2);
    padding: 4px 14px;
    border-radius: 100px;
    white-space: nowrap;
}

/* ===== Tool Area ===== */
.tool-area {
    flex: 1;
    max-width: 960px;
    margin: 0 auto;
    width: 100%;
    padding: 28px 16px 48px;
}

/* ===== Drop Zone ===== */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(74, 222, 128, 0.04);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-icon {
    color: var(--text-dim);
}

.drop-text {
    font-size: 1rem;
    color: var(--text-dim);
}

.file-btn {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    border: none;
    padding: 10px 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.file-btn:hover {
    background: var(--accent-hover);
}

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

/* ===== Controls ===== */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1 1 160px;
}

.control-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-dim);
}

.control-group .val {
    color: var(--accent);
    font-weight: 700;
}

.color-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

input[type="color"] {
    width: 44px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: var(--bg-input);
}

.hex-input {
    flex: 1;
    min-width: 0;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: monospace;
    font-size: 0.85rem;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s;
}

.hex-input:focus {
    border-color: var(--accent);
}

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

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
}

.small-btn {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-dim);
    background: var(--bg-input);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.2s, border-color 0.2s;
}

.small-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.small-btn.active {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(74,222,128,0.06);
}

/* ===== Canvas Area ===== */
.canvas-area {
    margin-top: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    overflow: auto;
    max-width: 100%;
}

.canvas-wrapper {
    position: relative;
    display: inline-block;
    margin: 0 auto;
    max-width: 100%;
    line-height: 0;
}

#dstCanvas {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
}

.checker-bg {
    display: none;
}

.canvas-wrapper.bg-checker #dstCanvas {
    background-image:
        linear-gradient(45deg, #333 25%, transparent 25%),
        linear-gradient(-45deg, #333 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #333 75%),
        linear-gradient(-45deg, transparent 75%, #333 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
    background-color: #555;
}

.canvas-wrapper.bg-white #dstCanvas {
    background: #fff;
}

.canvas-wrapper.bg-black #dstCanvas {
    background: #000;
}

/* ===== Actions ===== */
.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
}

.primary-btn {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bg);
    background: var(--accent);
    border: none;
    padding: 12px 32px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.primary-btn:hover {
    background: var(--accent-hover);
}

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

.ghost-btn {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dim);
    background: transparent;
    border: 1px solid var(--border);
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

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

/* ===== File List ===== */
.file-list {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.file-item .name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text);
}

.file-item .size {
    color: var(--text-muted);
    font-size: 0.78rem;
}

.file-item .status {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.file-item .status.done {
    color: var(--accent);
}

.file-item .download-link {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    cursor: pointer;
}

/* ===== Info Section ===== */
.info-section {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 40px 20px;
}

.info-grid {
    max-width: 960px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.info-card {
    padding: 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.info-card h2 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 10px;
}

.info-card p {
    font-size: 0.88rem;
    color: var(--text-dim);
}

/* ===== FAQ ===== */
.faq {
    max-width: 960px;
    margin: 32px auto 0;
}

.faq summary {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    cursor: pointer;
    padding: 14px 0;
    border-top: 1px solid var(--border);
    list-style: none;
    position: relative;
    padding-left: 28px;
}

.faq summary::-webkit-details-marker {
    display: none;
}

.faq summary::before {
    content: "+";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 700;
}

.faq[open] summary::before {
    content: "−";
}

.faq-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 8px 0 20px 28px;
}

.qa p {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.qa p strong {
    color: var(--text);
}

/* ===== Footer ===== */
.site-footer {
    text-align: center;
    padding: 20px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}

.site-footer p {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ===== Eyedropper ===== */
#pickerCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    cursor: crosshair;
}

#pickerCanvas.hidden {
    display: none;
}

/* ===== Utilities ===== */
.hidden {
    display: none !important;
}

/* ===== Mobile ===== */
@media (max-width: 640px) {
    .site-header {
        padding: 24px 16px 18px;
    }

    .badges {
        gap: 6px;
        padding: 10px 12px;
    }

    .badge {
        font-size: 0.7rem;
        padding: 3px 10px;
    }

    .drop-zone {
        padding: 32px 16px;
    }

    .controls {
        padding: 16px;
        gap: 12px;
    }

    .control-group {
        flex: 1 1 100%;
    }

    .actions {
        flex-direction: column;
    }

    .primary-btn,
    .ghost-btn {
        width: 100%;
        text-align: center;
    }

    .info-card {
        padding: 20px;
    }
}