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

/* ===== DESIGN TOKENS (ported from ProxiJSON) ===== */
:root {
    --bg: #0c0c0c;
    --bg2: #111111;
    --bg3: #181818;
    --border: #252525;
    --border2: #303030;
    --text: #d0d0d0;
    --text-dim: #555555;
    --text-mid: #888888;
    --green: #3ddc84;
    --green-dk: #1a4a30;
    --red: #f16363;
    --blue: #5b9cf6;
    --amber: #f0c040;
    --purple: #b48eff;
    --orange: #f0874a;
    --slate: #7a8694;
    --font: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --radius: 2px;
    --trans: 0.15s ease;
}

html, body {
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 13px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body {
    padding: 2rem 1rem;
}

/* ===== SCROLLBARS ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #444; }

::selection {
    background: rgba(61, 220, 132, 0.18);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== HEADER ===== */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.header h1 {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.header h1::before {
    content: '> ';
    color: var(--green);
}

.header p {
    color: var(--text-mid);
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.version {
    display: inline-block;
    background: var(--bg3);
    color: var(--text-mid);
    border: 1px solid var(--border2);
    padding: 0.2rem 0.65rem;
    border-radius: var(--radius);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.08em;
}

/* ===== Mode Selector ===== */
.mode-selector {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    flex-wrap: wrap;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: color var(--trans), border-color var(--trans), background var(--trans);
    background: transparent;
    color: var(--text-mid);
    position: relative;
    font-family: var(--font);
}

.mode-btn:hover {
    color: var(--text);
    border-color: var(--border2);
    background: var(--bg3);
}

.mode-btn.active {
    color: var(--green);
    border-color: var(--green-dk);
    background: rgba(61, 220, 132, 0.06);
}

.mode-btn.mode-coming-soon {
    opacity: 0.4;
    cursor: not-allowed;
}

.mode-btn.mode-coming-soon:hover {
    border-color: var(--border2);
    background: transparent;
    color: var(--text-mid);
}

.coming-soon-badge {
    background: var(--amber);
    color: var(--bg);
    font-size: 0.6rem;
    padding: 0.1rem 0.35rem;
    border-radius: var(--radius);
    font-weight: 700;
    margin-left: 0.25rem;
}

/* ===== Coming Soon Message ===== */
.coming-soon-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-mid);
}

.coming-soon-message svg {
    color: var(--amber);
    margin-bottom: 1rem;
}

.coming-soon-message h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.coming-soon-message p {
    font-size: 0.85rem;
    color: var(--text-mid);
}

/* ===== Main Grid ===== */
.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .main-grid {
        grid-template-columns: 400px 1fr;
    }
}

/* ===== Panel ===== */
.panel {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.1rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border);
}

.panel-header h2 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-mid);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.panel-header.success h2 {
    color: var(--green);
}

/* ===== Form Elements ===== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-mid);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.form-group select,
.form-group input[type="number"],
.form-group input[type="text"],
.form-group input[type="range"] {
    width: 100%;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-family: var(--font);
    transition: border-color var(--trans), background var(--trans);
    background: var(--bg);
    color: var(--text);
}

.form-group select:focus,
.form-group input[type="number"]:focus,
.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--green-dk);
}

.form-group select option {
    background: var(--bg2);
    color: var(--text);
}

.custom-size {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.note {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.5rem;
    line-height: 1.6;
}

/* range slider value display */
.range-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.range-row input[type="range"] {
    flex: 1;
    accent-color: var(--green);
    background: transparent;
    padding: 0;
}

.range-value {
    font-size: 0.8rem;
    color: var(--green);
    min-width: 3.5rem;
    text-align: right;
    font-weight: 600;
}

/* ===== Upload Area ===== */
.upload-area {
    margin-top: 1.5rem;
    border: 1px dashed var(--border2);
    border-radius: var(--radius);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--trans);
    position: relative;
    background: var(--bg);
}

.upload-area:hover {
    border-color: var(--green-dk);
    background: rgba(61, 220, 132, 0.04);
}

.upload-area svg {
    color: var(--text-dim);
    margin-bottom: 0.75rem;
}

.upload-area:hover svg {
    color: var(--green);
}

.upload-text {
    color: var(--text);
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.85rem;
}

.upload-subtext {
    color: var(--text-dim);
    font-size: 0.75rem;
}

.upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* ===== File List ===== */
.file-list {
    max-height: 450px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem;
    background: var(--bg3);
    border-radius: var(--radius);
    margin-bottom: 0.6rem;
    transition: background var(--trans);
    border: 1px solid var(--border);
}

.file-item:hover {
    background: #1d1d1d;
    border-color: var(--border2);
}

.file-preview {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border2);
}

.file-icon {
    width: 44px;
    height: 44px;
    background: var(--bg);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.file-icon svg {
    color: var(--blue);
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.75rem;
    color: var(--text-mid);
}

.remove-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 0.25rem;
    transition: color var(--trans);
}

.remove-btn:hover {
    color: var(--red);
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.clear-btn {
    background: none;
    border: none;
    color: var(--red);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--trans);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-family: var(--font);
}

.clear-btn:hover {
    opacity: 0.7;
}

/* ===== Convert Section ===== */
.convert-section {
    text-align: center;
}

.convert-btn {
    padding: 0.85rem 2.5rem;
    background: rgba(61, 220, 132, 0.08);
    color: var(--green);
    border: 1px solid var(--green-dk);
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--trans);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font);
}

.convert-btn:hover {
    background: rgba(61, 220, 132, 0.15);
    border-color: var(--green);
}

.convert-btn:active {
    transform: translateY(1px);
}

.convert-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== Converted Section ===== */
.converted-list {
    display: grid;
    gap: 0.85rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .converted-list {
        grid-template-columns: 1fr 1fr;
    }
}

.converted-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(61, 220, 132, 0.04);
    border: 1px solid var(--green-dk);
    border-radius: var(--radius);
}

.converted-info {
    flex: 1;
    min-width: 0;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    background: rgba(61, 220, 132, 0.1);
    color: var(--green);
    border: 1px solid var(--green-dk);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background var(--trans);
    white-space: nowrap;
    font-family: var(--font);
}

.download-btn:hover {
    background: rgba(61, 220, 132, 0.2);
}

.download-all-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    background: rgba(61, 220, 132, 0.1);
    color: var(--green);
    border: 1px solid var(--green-dk);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background var(--trans);
    font-family: var(--font);
}

.download-all-btn:hover {
    background: rgba(61, 220, 132, 0.2);
}

.reset-btn {
    width: 100%;
    padding: 0.75rem;
    background: transparent;
    color: var(--text-mid);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--trans);
    font-family: var(--font);
}

.reset-btn:hover {
    color: var(--text);
    border-color: var(--border2);
    background: var(--bg3);
}

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

/* ===== Magic Mode ===== */
.magic-item {
    background: rgba(240, 192, 64, 0.05);
    border: 1px solid #5a4a1a;
}

.magic-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.magic-info small {
    color: var(--amber);
    font-weight: 500;
    font-size: 0.75rem;
}

/* ===== Spritesheet Mode ===== */
.spritesheet-item {
    background: rgba(91, 156, 246, 0.05);
    border: 1px solid #1f3a5c;
}

.spritesheet-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.spritesheet-info small {
    color: var(--blue);
    font-weight: 500;
    font-size: 0.75rem;
}

/* ===== Audio Mode ===== */
.audio-item {
    background: rgba(180, 142, 255, 0.05);
    border: 1px solid #3a2d5c;
}

.audio-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.audio-info small {
    color: var(--purple);
    font-weight: 500;
    font-size: 0.75rem;
}

.file-icon.audio-icon svg {
    color: var(--purple);
}

/* ===== Spritesheet Preview ===== */
.spritesheet-preview {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    animation: fadeIn 0.2s ease;
    overflow: hidden;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.preview-header {
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    min-height: 56px;
}

.preview-header h3 {
    color: var(--text);
    font-size: 0.95rem;
    margin: 0;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.close-preview-btn {
    background: var(--bg3);
    border: 1px solid var(--border2);
    color: var(--text-mid);
    cursor: pointer;
    padding: 0.6rem;
    border-radius: var(--radius);
    transition: all var(--trans);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
}

.close-preview-btn:hover,
.close-preview-btn:active {
    color: var(--text);
    border-color: var(--border2);
    background: #222;
}

.preview-content {
    flex: 1;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--bg);
}

#previewCanvas {
    display: block;
    width: 100%;
    height: auto;
    max-width: 100%;
    background:
        repeating-conic-gradient(#1a1a1a 0% 25%, #111 0% 50%)
        50% / 16px 16px;
    border-bottom: 1px solid var(--border);
}

.preview-info {
    padding: 1rem;
    background: var(--bg2);
}

.preview-info h4 {
    margin: 0 0 1rem 0;
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.preview-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.preview-stat {
    background: var(--bg3);
    padding: 0.875rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.preview-stat label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-bottom: 0.35rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.preview-stat value {
    display: block;
    font-size: 1rem;
    color: var(--green);
    font-weight: 700;
}

/* ===== Inputs ===== */
input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    cursor: pointer;
    accent-color: var(--green);
}

input[type="color"] {
    width: 100%;
    height: 38px;
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    cursor: pointer;
    background: var(--bg);
}

/* ===== Toast / Notification ===== */
.notification {
    font-family: var(--font) !important;
    letter-spacing: 0.04em;
    border: 1px solid var(--border2);
}

.notification-success {
    background: rgba(61, 220, 132, 0.12) !important;
    color: var(--green) !important;
    border-color: var(--green-dk) !important;
    box-shadow: none !important;
}

.notification-error {
    background: rgba(241, 99, 99, 0.12) !important;
    color: var(--red) !important;
    border-color: #5c2222 !important;
    box-shadow: none !important;
}

.notification-info {
    background: var(--bg3) !important;
    color: var(--text) !important;
    border-color: var(--border2) !important;
    box-shadow: none !important;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 374px) {
    .preview-header h3 { font-size: 0.85rem; }
    .preview-info { padding: 0.75rem; }
    .preview-stat { padding: 0.75rem; }
    .preview-stat value { font-size: 0.9rem; }
}

@media (min-width: 375px) and (max-width: 767px) {
    .preview-grid { grid-template-columns: 1fr 1fr; }
    .preview-info { padding: 1.25rem; }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .preview-content {
        margin: 2rem;
        border-radius: var(--radius);
        max-height: calc(100vh - 4rem);
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }
    .preview-header { border-radius: var(--radius) var(--radius) 0 0; }
    .preview-grid { grid-template-columns: repeat(2, 1fr); }
    #previewCanvas { max-height: 60vh; width: auto; margin: 0 auto; border-bottom: none; }
}

@media (min-width: 1024px) {
    .spritesheet-preview { padding: 2rem; }
    .preview-content {
        max-width: 1200px;
        max-height: calc(100vh - 4rem);
        margin: 0 auto;
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
        display: flex;
        flex-direction: column;
        border: 1px solid var(--border);
    }
    .preview-header { border-radius: var(--radius) var(--radius) 0 0; padding: 1.5rem; }
    .preview-header h3 { font-size: 1.1rem; }
    .preview-grid { grid-template-columns: repeat(3, 1fr); }
    .preview-info { padding: 2rem; }
    #previewCanvas { max-height: 70vh; width: auto; margin: 1rem auto; border: 1px solid var(--border); }
    .close-preview-btn { padding: 0.875rem; }
}

@media (max-width: 767px) and (orientation: landscape) {
    .preview-header { padding: 0.75rem 1rem; min-height: 50px; }
    .preview-header h3 { font-size: 0.85rem; }
    .preview-info { padding: 1rem; }
    .preview-grid { grid-template-columns: repeat(3, 1fr); }
    .preview-stat { padding: 0.5rem; }
    .preview-stat label { font-size: 0.65rem; }
    .preview-stat value { font-size: 0.85rem; }
    #previewCanvas { max-height: 50vh; }
}

@media (hover: none) and (pointer: coarse) {
    .close-preview-btn { min-width: 48px; min-height: 48px; }
    .preview-stat { min-height: 60px; }
}

@supports (padding: max(0px)) {
    .preview-header {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
        padding-top: max(1rem, env(safe-area-inset-top));
    }
    .preview-info {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }
}