/* ============================================================
   HoMM3 Explorer - Modern CSS

   SPDX-License-Identifier: MIT
   Copyright (c) 2026 HoMM3 Explorer Contributors
   ============================================================ */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-hover: #21262d;
    --bg-accent: #1f6feb22;
    --border: #30363d;
    --border-light: #484f58;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7680;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --accent-bg: #1f6feb;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --gold: #e3b341;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
    --shadow-md: 0 4px 12px rgba(0,0,0,.5);
    --shadow-lg: 0 8px 24px rgba(0,0,0,.6);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: 150ms ease;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;         /* fallback */
    height: 100dvh;        /* modern: shrinks when browser UI appears */
    height: var(--app-height, 100vh); /* JS-driven fallback for older Android */
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ---- Header ---- */
#header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 16px;
    height: 52px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
}

.logo-icon {
    font-size: 20px;
    filter: drop-shadow(0 0 6px rgba(227,179,65,.4));
}

.logo-text {
    background: linear-gradient(135deg, var(--gold), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-nav {
    display: flex;
    gap: 4px;
    margin-left: 24px;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition);
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.nav-btn.active {
    color: var(--text-primary);
    background: var(--bg-accent);
    border-color: var(--accent);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition);
}

.action-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.action-btn.github-btn {
    text-decoration: none;
}

.action-btn.accent {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: #fff;
}

.action-btn.accent:hover {
    background: #388bfd;
}

/* ---- Screens ---- */
#main-content {
    flex: 1;
    overflow: hidden;
    position: relative;
}

#main-content.drag-over {
    outline: 3px dashed var(--accent);
    outline-offset: -3px;
    background: var(--bg-accent);
}

.screen {
    display: none;
    position: absolute;
    inset: 0;
}

.screen.active {
    display: flex;
}

/* ---- Welcome Screen ---- */
#welcome-screen {
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at center, rgba(31,111,235,.06) 0%, transparent 70%);
}

.welcome-content {
    text-align: center;
    max-width: 520px;
    animation: fadeInUp .5s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-icon {
    font-size: 64px;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 24px rgba(227,179,65,.3));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.welcome-content h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.welcome-content h2 {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.welcome-desc {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 28px;
}

.welcome-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 24px;
}

.welcome-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.welcome-btn.primary {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: #fff;
}

.welcome-btn.primary:hover {
    background: #388bfd;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.welcome-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.welcome-btn.secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
    transform: translateY(-1px);
}

.welcome-formats {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.format-badge {
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.format-badge-exe {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.3);
    color: #60a5fa;
}

.welcome-hint {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ---- Explorer Layout ---- */
.explorer-layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.explorer-sidebar {
    width: clamp(280px, 33.333vw, 50%);
    min-width: 280px;
    max-width: 50%;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background: var(--bg-secondary);
    resize: horizontal;
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sidebar-header-row .sidebar-title {
    flex-shrink: 1;
    min-width: 0;
}

.sidebar-title {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .5px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.archive-select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font: inherit;
    font-size: 12px;
    cursor: pointer;
    max-width: 180px;
}

.sidebar-controls {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sidebar-controls-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex-shrink: 0;
}

.archive-dl-btns {
    display: flex;
    gap: 4px;
}

.icon-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 7px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font: inherit;
    font-size: 11px;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.icon-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.icon-btn:disabled {
    opacity: 0.5;
    cursor: default;
}

.view-toggle {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 26px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
}

.view-btn:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.view-btn:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }

.view-btn.active {
    background: var(--accent-bg);
    color: #fff;
}

.view-btn:hover:not(.active) {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.icon-size-control {
    display: flex;
    align-items: center;
    gap: 6px;
}

.icon-size-control label {
    font-size: 11px;
    color: var(--text-muted);
}

.icon-size-control input[type="range"] {
    width: 70px;
    height: 4px;
    accent-color: var(--accent);
}

.search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
}

.search-bar input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font: inherit;
    font-size: 13px;
    outline: none;
}

.search-bar input::placeholder {
    color: var(--text-muted);
}

.file-count {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
}

/* ---- File List ---- */
.file-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.file-list.list-view {
    display: flex;
    flex-direction: column;
}

.file-list.grid-view {
    display: flex;
    flex-wrap: wrap;
    padding: 8px;
    gap: 8px;
    align-content: flex-start;
}

/* List Item */
.file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    cursor: pointer;
    transition: background var(--transition);
    border-left: 3px solid transparent;
    min-height: 34px;
}

.file-item:hover {
    background: var(--bg-hover);
}

.file-item.selected {
    background: var(--bg-accent);
    border-left-color: var(--accent);
}

.file-item-icon {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
}

.file-item-name {
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.file-item-size {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.file-item-ext {
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 10px;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-transform: uppercase;
    border: 1px solid var(--border);
}

/* PAK Tree View */
.pak-tree-group { }
.pak-tree-header {
    font-weight: 500;
}
.pak-tree-header .pak-tree-toggle {
    width: 14px;
    font-size: 10px;
    flex-shrink: 0;
    color: var(--text-muted);
    user-select: none;
}
.pak-tree-header .file-item-ext {
    font-size: 10px;
    color: var(--text-muted);
    background: none;
    border: none;
    padding: 0;
}
.pak-tree-children { }
.pak-tree-child {
    padding-left: 42px !important;
}
.pak-tree-child .file-item-icon {
    font-size: 12px;
}

/* Grid Item */
.grid-view .file-item {
    flex-direction: column;
    padding: 8px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    border-left: 1px solid var(--border);
    background: var(--bg-tertiary);
    gap: 6px;
    text-align: center;
    position: relative;
}

.grid-view .file-item:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.grid-view .file-item.selected {
    border-color: var(--accent);
    background: var(--bg-accent);
}

.grid-view .file-item-icon {
    width: 100%;
    height: var(--icon-size, 64px);
    font-size: 32px;
    position: relative;
}

.grid-view .file-item-icon canvas,
.grid-view .file-item-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    image-rendering: pixelated;
}

.grid-view .file-item-name {
    font-size: 11px;
    word-break: break-all;
    white-space: normal;
    line-height: 1.3;
}

.grid-view .file-item-size,
.grid-view .file-item-ext {
    display: none;
}

/* ---- Preview Panel ---- */
.explorer-preview {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-primary);
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

/* Preview Content */
.preview-wrapper {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.preview-filename {
    font-weight: 600;
    font-size: 14px;
}

.preview-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    gap: 12px;
}

.preview-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.preview-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}

.preview-toolbar button {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 12px;
    white-space: nowrap;
}

.preview-toolbar button:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.preview-toolbar select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font: inherit;
    font-size: 12px;
    cursor: pointer;
}

/* Always-visible button in preview header (e.g. Open in Viewer ▶) */
.preview-open-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 12px;
    white-space: nowrap;
}
.preview-open-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Frame counter in the controls bar */
.def-frame-badge {
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    padding: 0 4px;
    white-space: nowrap;
}

/* Mobile collapse toggles — hidden on desktop, shown via media query */
.preview-toolbar-toggle,
.def-mobile-toggle,
.def-controls .def-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 14px;
}
.preview-toolbar-toggle {
    min-width: 28px;
    height: 28px;
    padding: 0 6px;
    margin-left: auto;
}
.def-mobile-toggle {
    min-width: 34px;
    height: 32px;
    padding: 0 6px;
}
.preview-toolbar-toggle.active,
.def-mobile-toggle.active {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: var(--accent);
}

.video-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    max-width: 640px;
    padding: 8px 0;
}

.video-controls button {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition);
}

.video-controls button:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}

.video-controls input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.video-controls input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.video-controls input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}

.preview-body {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
}

.preview-body.checkerboard {
    background-image:
        linear-gradient(45deg, #1a1e24 25%, transparent 25%),
        linear-gradient(-45deg, #1a1e24 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1a1e24 75%),
        linear-gradient(-45deg, transparent 75%, #1a1e24 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

.preview-body.bg-white,
.def-player.bg-white {
    background: #ffffff;
    background-image: none;
}

.preview-body canvas,
.preview-body img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    image-rendering: pixelated;
}

.preview-body.zoom-actual canvas,
.preview-body.zoom-actual img {
    max-width: none;
    max-height: none;
}

/* Map preview */
.map-preview-body {
    align-items: flex-start !important;
    justify-content: flex-start !important;
    overflow: auto;
    padding: 20px;
}
.map-preview-card {
    max-width: 560px;
    width: 100%;
}
.map-preview-icon {
    font-size: 40px;
    line-height: 1;
    margin-bottom: 12px;
}
.map-preview-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 12px;
}
.map-preview-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    background: var(--bg-secondary);
    padding: 10px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin: 12px 0;
    white-space: pre-wrap;
    word-break: break-word;
}
.map-preview-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 10px;
    margin-top: 4px;
}
.map-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 10px;
}
.map-meta-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--text-muted);
}
.map-meta-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* Text preview */
.preview-text {
    width: 100%;
    height: 100%;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    overflow: auto;
    color: var(--text-primary);
    padding: 16px;
    text-align: left;
    align-self: flex-start;
}

.defviewer-sidebar .sidebar-header {
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
}

.defviewer-sidebar .sidebar-header-row {
    flex: 1;
    flex-wrap: nowrap;
}

/* ---- DEF Viewer Layout ---- */
.defviewer-layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.defviewer-sidebar {
    width: clamp(280px, 33.333vw, 50%);
    min-width: 280px;
    max-width: 50%;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background: var(--bg-secondary);
}

.defviewer-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.def-info-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.def-info-header {
    display: none;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
}

.def-info-header h3 {
    font-size: 15px;
    margin-bottom: 6px;
}

.def-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.def-info-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.def-info-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--text-muted);
}

.def-info-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.def-animation-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.def-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: 0;         /* let flexbox shrink freely; no hard min pushes layout */
    touch-action: none;    /* let our pointer-event handler manage all gestures */
    overscroll-behavior: contain;
    background-image:
        linear-gradient(45deg, #1a1e24 25%, transparent 25%),
        linear-gradient(-45deg, #1a1e24 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1a1e24 75%),
        linear-gradient(-45deg, transparent 75%, #1a1e24 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
    overflow: auto;
    padding: 20px;
}

.def-player canvas {
    image-rendering: pixelated;
}

.def-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.def-controls button {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 32px;
    padding: 0 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 14px;
    white-space: nowrap;
}

.def-controls button:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.def-controls button.active {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: #fff;
}

.def-controls .speed-control {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
}

.def-controls .speed-control label {
    font-size: 11px;
    color: var(--text-muted);
}

.def-controls .speed-control input {
    width: 80px;
    accent-color: var(--accent);
}

.def-controls .speed-value {
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    min-width: 40px;
}

.def-controls .group-select {
    margin-left: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.def-controls .group-select label {
    font-size: 11px;
    color: var(--text-muted);
}

.def-controls select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font: inherit;
    font-size: 12px;
}

.def-controls .render-mode {
    margin-left: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.def-controls .render-mode label {
    font-size: 11px;
    color: var(--text-muted);
}

.def-frames-panel {
    height: 140px;
    min-height: 100px;
    overflow-y: hidden;
    overflow-x: auto;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    resize: vertical;
}

.def-frames-header {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
}

.def-frames-strip {
    display: flex;
    gap: 4px;
    padding: 8px;
    overflow-x: auto;
    flex: 1;
    align-items: center;
}

.def-frame-thumb {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    overflow: hidden;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    transition: all var(--transition);
    position: relative;
}

.def-frame-thumb:hover {
    border-color: var(--border-light);
}

.def-frame-thumb.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.def-frame-thumb canvas {
    max-width: 100%;
    max-height: 100%;
    image-rendering: pixelated;
}

.def-frame-thumb .frame-number {
    position: absolute;
    bottom: 1px;
    right: 2px;
    font-size: 9px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: rgba(0,0,0,.6);
    padding: 0 3px;
    border-radius: 2px;
}

/* ---- Loading Overlay ---- */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(13,17,23,.85);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.loading-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
}

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

.loading-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.loading-progress {
    width: 200px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--gold));
    border-radius: 2px;
    width: 0%;
    transition: width .3s ease;
}

/* ---- Toast ---- */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 200;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    font-size: 13px;
    animation: slideIn .3s ease;
    max-width: 380px;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }
.toast.info { border-color: var(--accent); }

@keyframes slideIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: none; }
}

.toast-icon {
    font-size: 16px;
    flex-shrink: 0;
}

/* ---- Tag badges for file types ---- */
.ext-pcx { color: #3fb950; }
.ext-def { color: #d29922; }
.ext-txt { color: #8b949e; }
.ext-wav { color: #a371f7; }
.ext-msk { color: #768390; }
.ext-fnt { color: #768390; }
.ext-pal { color: #768390; }

/* ---- Responsive: Tablet (≤ 768px) ---- */
@media (max-width: 768px) {
    /* Header: hide button/nav labels, compact spacing */
    .header-nav span { display: none; }
    .action-btn span { display: none; }

    #header {
        gap: 8px;
        padding: 0 10px;
        height: 46px;
    }

    .header-nav { margin-left: 8px; }
    .header-right { gap: 4px; }
    .action-btn { padding: 6px 8px; }

    /* Explorer: vertical stack instead of side-by-side */
    .explorer-layout {
        flex-direction: column;
    }

    .explorer-sidebar {
        width: 100% !important;
        min-width: 0;
        max-width: 100%;
        height: 40vh;
        min-height: 180px;
        max-height: 50vh;
        resize: vertical;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .resize-handle { display: none; }

    .explorer-preview {
        flex: 1;
        min-height: 0;
    }

    /* DEF viewer: vertical stack */
    .defviewer-layout {
        flex-direction: column;
    }

    .defviewer-sidebar {
        width: 100% !important;
        min-width: 0;
        max-width: 100%;
        height: 40svh;        /* svh = smallest viewport height, always excludes browser bars */
        min-height: 150px;
        max-height: 50svh;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    /* DEF controls: allow wrapping */
    .def-controls .speed-control,
    .def-controls .group-select,
    .def-controls .render-mode {
        margin-left: 0;
    }
    .def-controls .frame-info {
        margin-left: 0;
        width: 100%;
    }

    /* Preview header: allow wrapping */
    .preview-header {
        flex-wrap: wrap;
        gap: 8px;
        padding: 8px 12px;
    }
    .preview-toolbar {
        margin-left: 0;
        width: 100%;
        flex-wrap: wrap;
    }

    /* Welcome screen: stack buttons */
    .welcome-actions {
        flex-direction: column;
        align-items: center;
    }
    .welcome-formats { flex-wrap: wrap; }

    /* Modal: more compact */
    .modal-overlay { padding: 10px; }
    .modal-box { padding: 20px 18px; max-height: 85vh; }
}

/* ---- Responsive: Phone (≤ 480px) ---- */
@media (max-width: 480px) {
    #header {
        gap: 4px;
        padding: 0 8px;
        height: 42px;
    }

    .logo-text { display: none; }

    .header-nav { margin-left: 4px; gap: 2px; }
    .nav-btn { padding: 6px 8px; }

    /* Welcome screen: smaller text */
    .welcome-content h1 { font-size: 22px; }
    .welcome-content h2 { font-size: 16px; }
    .welcome-icon { font-size: 48px; }
    .welcome-desc { font-size: 13px; }

    /* Sidebar shorter */
    .explorer-sidebar,
    .defviewer-sidebar {
        height: 35svh;
        min-height: 130px;
    }

    /* Preview: less padding */
    .preview-body { padding: 10px; }
    .search-bar { padding: 6px 10px; }

    /* Grid items narrower */
    .grid-view .file-item { min-width: 70px; }

    /* Toast: full width */
    .toast-container { right: 10px; bottom: 10px; left: 10px; }
    .toast { max-width: 100%; }

    /* Modal: full-screen */
    .modal-overlay { padding: 0; }
    .modal-box {
        max-width: 100%;
        max-height: 100vh;
        border-radius: 0;
        padding: 16px 14px;
    }
}

/* ---- Additional mobile: collapsible toolbars + animation controls ---- */
@media (max-width: 768px) {
    /* Show mobile toggle buttons */
    .preview-toolbar-toggle { display: flex; }
    .def-mobile-toggle,
    .def-controls .def-mobile-toggle { display: flex; }

    /* Preview header: hide toolbar & meta by default */
    .preview-toolbar { display: none !important; }
    .preview-meta   { display: none; }
    .preview-header.toolbar-expanded .preview-toolbar { display: flex !important; width: 100%; order: 10; flex-wrap: wrap; }
    .preview-header.toolbar-expanded .preview-meta   { display: flex; width: 100%; order: 9; }

    /* Animation viewer: show info header when expanded */
    .def-info-panel.mobile-expanded .def-info-header { display: block; }

    /* Animation controls: hide extra items by default, show when expanded */
    .def-controls .speed-control,
    .def-controls .group-select,
    .def-controls .render-mode,
    .def-controls .def-export-btns { display: none; }
    .def-info-panel.mobile-expanded .def-controls .speed-control,
    .def-info-panel.mobile-expanded .def-controls .group-select,
    .def-info-panel.mobile-expanded .def-controls .render-mode,
    .def-info-panel.mobile-expanded .def-controls .def-export-btns { display: flex; }

    /* Frames strip: a bit shorter on mobile */
    .def-frames-panel { height: 90px; min-height: 60px; }
}

/* ---- Resize handle ---- */
.resize-handle {
    width: 5px;
    cursor: col-resize;
    background: transparent;
    transition: background 0.15s;
    flex-shrink: 0;
    z-index: 5;
}
.resize-handle:hover,
.resize-handle:active {
    background: var(--accent);
}

/* ---- Extension filter dropdown ---- */
.ext-filter {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2px 4px;
    font-size: 11px;
    max-width: 80px;
    cursor: pointer;
}
.ext-filter:focus {
    outline: none;
    border-color: var(--accent);
}

/* ---- DEF export buttons ---- */
.def-export-btns {
    display: flex;
    gap: 4px;
    margin-left: auto;
    flex-wrap: wrap;
}
.def-export-btns button {
    font-size: 11px;
    padding: 3px 8px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    white-space: nowrap;
    min-width: auto;
}
.def-export-btns button:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ---- DEF sidebar thumbnail tweaks ---- */
#def-list .file-item-icon canvas {
    image-rendering: pixelated;
}
#def-list .grid-view .file-item-name,
#def-list.grid-view .file-item-name {
    font-size: 10px;
    word-break: break-all;
    white-space: normal;
    line-height: 1.2;
    max-height: 2.4em;
    overflow: hidden;
}

/* ---- Hex view scrollable ---- */
#hex-view {
    overflow-y: auto;
    max-height: 100%;
    white-space: pre;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.4;
}

/* ---- Toggle button (animate thumbs) ---- */
.toggle-btn {
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 3px 8px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.toggle-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.toggle-btn.active {
    background: var(--accent-bg);
    border-color: var(--accent);
    color: var(--accent);
}

/* ---- Image border overlay ---- */
canvas.img-border {
    outline: 1px solid #ff4444;
    outline-offset: 0px;
}

/* ---- About Modal ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    padding: 20px;
}

.modal-box {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 32px 36px;
    max-width: 560px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalIn .18s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(.95) translateY(-8px); }
    to   { opacity: 1; transform: none; }
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}
.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.about-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}
.about-logo h2 {
    font-size: 22px;
    background: linear-gradient(135deg, var(--gold), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-desc {
    color: var(--text-secondary);
    font-size: 13.5px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.about-section {
    margin-top: 18px;
}
.about-section h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    margin-bottom: 8px;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--border);
}
.about-section p,
.about-section li {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}
.about-section a {
    color: var(--accent);
    text-decoration: none;
}
.about-section a:hover {
    text-decoration: underline;
}
.about-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.about-list li::before {
    content: '›';
    margin-right: 6px;
    color: var(--accent);
}

.about-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12.5px;
    color: var(--text-secondary);
}
.about-table th,
.about-table td {
    padding: 6px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.about-table th {
    color: var(--text-muted);
    font-weight: 600;
}
.about-table tr:last-child td {
    border-bottom: none;
}

.about-disclaimer {
    margin-top: 20px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.5;
}