/* ===================================================================
   krfadvplayer – Material Design Theme
   Inspired by きらファン解析 Wiki (wiki.kirafan.moe)
   Color palette: primary #f48fb1, secondary #f8bbd0
   =================================================================== */

/* ===== CSS Variables ===== */
:root {
    --primary: #616161;
    --primary-dark: #424242;
    --primary-light: #e0e0e0;
    --secondary: #f5f5f5;
    --secondary-light: #fafafa;
    --surface: #ffffff;
    --background: #ffffff;
    --on-surface: #212121;
    --on-surface-secondary: #757575;
    --divider: #e0e0e0;
    --elevation-1: 0 1px 3px 0 rgba(0,0,0,.08), 0 1px 2px 0 rgba(0,0,0,.06);
    --elevation-2: 0 2px 4px -1px rgba(0,0,0,.08), 0 2px 4px 0 rgba(0,0,0,.06), 0 1px 6px 0 rgba(0,0,0,.04);
    --elevation-4: 0 2px 4px -1px rgba(0,0,0,.10), 0 4px 5px 0 rgba(0,0,0,.07), 0 1px 10px 0 rgba(0,0,0,.05);
    --elevation-8: 0 5px 5px -3px rgba(0,0,0,.10), 0 8px 10px 1px rgba(0,0,0,.06), 0 3px 14px 2px rgba(0,0,0,.04);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; }
body, html {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: var(--background);
    font-family: Avenir, Verdana, Helvetica, "Hiragino Sans GB", "Source Han Sans CN",
                 "WenQuanYi Micro Hei", "Microsoft Yahei", sans-serif;
    -webkit-font-smoothing: antialiased;
    color: var(--on-surface);
}

/* ===== Unity canvas ===== */
#unity-container {
    width: 100vw;
    height: 100vh;
}
#unity-canvas {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

/* ===== Menu overlay ===== */
#krf-menu-ui {
    position: fixed;
    inset: 0;
    background: var(--background);
    display: flex;
    flex-direction: column;
    z-index: 999;
}

/* ===== App bar (built with .krf-title) ===== */
.krf-title {
    margin: 0;
    padding: 14px 24px;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: .5px;
    color: rgba(0, 0, 0, 0.87);
    background-color: var(--secondary);
    box-shadow: var(--elevation-2);
    flex-shrink: 0;
    z-index: 1;
}

/* ===== Main panel (card) ===== */
.krf-panel {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    /* no explicit card — the panel IS the full page layout */
}

/* ===== Three-column area ===== */
.krf-columns-area {
    display: flex;
    gap: 0;
    flex: 1 1 0;
    min-height: 0;
    padding: 16px;
    gap: 16px;
}

.krf-list-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border-radius: 4px;
    box-shadow: var(--elevation-1);
    overflow: hidden;
    min-width: 0;
}

/* Column width ratios */
#col1-types     { flex: 0.5; }
#col2-subtypes  { flex: 1.2; }
#col3-advids    { flex: 1.4; }
#col4-selected  { flex: 1.3; }

.krf-col-header {
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-dark);
    letter-spacing: .8px;
    text-transform: uppercase;
    background: var(--secondary);
    border-bottom: none;
    flex-shrink: 0;
    user-select: none;
}

.krf-col-body {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

/* Scrollbar — thin & themed */
.krf-col-body::-webkit-scrollbar { width: 6px; }
.krf-col-body::-webkit-scrollbar-track { background: transparent; }
.krf-col-body::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}
.krf-col-body::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

.krf-col-placeholder {
    padding: 32px 12px;
    text-align: center;
    color: var(--on-surface-secondary);
    font-size: 14px;
}

/* ===== List buttons (column 1 & 2) ===== */
.krf-list-btn {
    display: block;
    width: 100%;
    padding: 10px 16px;
    margin-bottom: 2px;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    color: var(--on-surface);
    transition: background 0.15s ease;
    text-align: left;
    line-height: 1.5;
    font-family: inherit;
}
.krf-list-btn:hover {
    background: rgba(0, 0, 0, 0.06);
}
.krf-list-btn.active {
    background: var(--primary);
    color: #fff;
    border: none;
    box-shadow: none;
    font-weight: 500;
}

/* ===== Checkbox list (column 3) ===== */
.krf-checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--on-surface);
    font-size: 14px;
    transition: background 0.15s;
}
.krf-checkbox-item:hover {
    background: rgba(0, 0, 0, 0.04);
}
.krf-checkbox-item + .krf-checkbox-item {
    border-top: 1px solid var(--divider);
}
.krf-checkbox-item input[type="checkbox"] {
    accent-color: var(--primary);
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    cursor: pointer;
}

/* ===== Bottom bar ===== */
.krf-bottom-bar {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 12px 24px 16px;
    background: var(--surface);
    box-shadow: 0 -1px 4px rgba(0,0,0,0.06);
    flex-wrap: nowrap;
    flex-shrink: 0;
}

/* ===== Volume sliders ===== */
.krf-volume-group {
    display: flex;
    gap: 20px;
    flex: 1;
}
.krf-volume-item {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}
.krf-volume-item label {
    font-size: 13px;
    font-weight: 600;
    color: var(--on-surface-secondary);
    min-width: 40px;
    text-align: right;
}

/* Range input — Material slider style */
.krf-volume-item input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 4px;
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    --pct: 100%;
    background: linear-gradient(
        to right,
        var(--primary) 0%, var(--primary) var(--pct),
        #e0e0e0 var(--pct), #e0e0e0 100%
    );
    transition: opacity 0.15s;
}
.krf-volume-item input[type="range"]:hover {
    opacity: 0.85;
}
.krf-volume-item input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: box-shadow 0.15s, transform 0.15s;
}
.krf-volume-item input[type="range"]::-webkit-slider-thumb:hover {
    box-shadow: 0 0 0 8px rgba(97, 97, 97, 0.12), 0 1px 3px rgba(0,0,0,0.2);
    transform: scale(1.15);
}
.krf-volume-item input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    cursor: pointer;
}
.krf-volume-item input[type="range"]::-moz-range-track {
    height: 4px;
    border-radius: 2px;
    background: #e0e0e0;
}
.krf-volume-item input[type="range"]::-moz-range-progress {
    height: 4px;
    border-radius: 2px;
    background: var(--primary);
}

.krf-vol-value {
    font-size: 13px;
    font-weight: 500;
    color: var(--on-surface-secondary);
    min-width: 28px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ===== Action bar ===== */
.krf-action-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
    margin-left: auto;
}
#selected-count {
    font-size: 14px;
    color: var(--on-surface-secondary);
    font-weight: 500;
    white-space: nowrap;
    min-width: 90px;
    text-align: right;
}

/* ===== Play button — Material contained button ===== */
.krf-play-btn {
    background-color: var(--primary);
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 10px 28px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: .8px;
    transition: background-color 0.2s, box-shadow 0.2s;
    box-shadow: var(--elevation-2);
}
.krf-play-btn:hover:not(:disabled) {
    background-color: var(--primary-dark);
    box-shadow: var(--elevation-4);
}
.krf-play-btn:active:not(:disabled) {
    box-shadow: var(--elevation-8);
}
.krf-play-btn:disabled {
    background-color: #e0e0e0;
    color: #9e9e9e;
    cursor: default;
    box-shadow: none;
}

/* ===== Subcategory row (checkbox + button) ===== */
.krf-subtype-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 2px;
    border-radius: 4px;
    transition: background 0.15s;
}
.krf-subtype-row:hover {
    background: rgba(0, 0, 0, 0.04);
}
.krf-subtype-row.active {
    background: var(--primary);
}
.krf-subtype-row.active .krf-subtype-btn {
    color: #fff;
    font-weight: 500;
}
.krf-subtype-checkbox {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    cursor: pointer;
    margin-left: 10px;
}
.krf-subtype-btn {
    flex: 1;
    min-width: 0;
    margin-bottom: 0 !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}

/* ===== Selected column (col4) items ===== */
.krf-selected-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border-radius: 4px;
    transition: background 0.15s;
    font-size: 13px;
    color: var(--on-surface);
}
.krf-selected-item:hover {
    background: rgba(0, 0, 0, 0.04);
}
.krf-selected-item + .krf-selected-item {
    border-top: 1px solid var(--divider);
}
.krf-selected-title {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.4;
}
.krf-selected-advid {
    flex-shrink: 0;
    font-size: 12px;
    color: var(--on-surface-secondary);
    font-variant-numeric: tabular-nums;
    min-width: 52px;
    text-align: right;
}
.krf-remove-btn {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--on-surface-secondary);
    font-size: 16px;
    line-height: 22px;
    text-align: center;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    padding: 0;
    font-family: inherit;
}
.krf-remove-btn:hover {
    background: rgba(0, 0, 0, 0.08);
    color: #d32f2f;
}

/* ===== Ad blocker warning banner ===== */
#adblocker-warning {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 16px;
    background: #fff3e0;
    border-bottom: 1px solid #ffe0b2;
    color: #e65100;
    font-size: 13px;
    z-index: 20;
    line-height: 1.4;
}
#adblocker-dismiss {
    flex-shrink: 0;
    background: none;
    border: none;
    font-size: 18px;
    color: #e65100;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
}
#adblocker-dismiss:hover {
    opacity: 0.7;
}

/* ===== Loading overlay ===== */
#loading-overlay {
    position: absolute;
    inset: 0;
    background: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}
.loading-box {
    text-align: center;
    width: 320px;
}
.loading-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--on-surface);
    margin-bottom: 24px;
    letter-spacing: .5px;
}
.loading-bar-track {
    height: 4px;
    background: #e0e0e0;
    border-radius: 2px;
    overflow: hidden;
}
.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}
.loading-text {
    margin-top: 12px;
    font-size: 13px;
    color: var(--on-surface-secondary);
    font-variant-numeric: tabular-nums;
}

/* ===== Responsive ===== */
@media (max-width: 800px) {
    .krf-columns-area { flex-direction: column; padding: 8px; gap: 8px; }
    #col1-types, #col2-subtypes, #col3-advids, #col4-selected { flex: 1; }
    .krf-bottom-bar { flex-direction: column; align-items: stretch; flex-wrap: wrap; padding: 12px 16px; }
    .krf-volume-group { flex-direction: column; gap: 10px; }
    .krf-action-bar { justify-content: space-between; margin-left: 0; }
    .krf-title { padding: 12px 16px; font-size: 16px; }
}