/* ============================================
   mp4 Slicer - スタイルシート
   Enhanced Glassmorphism + Modern Design
   ============================================ */

/* CSS変数 - カラー設定 (ここで一括管理) */
:root {
    /* --- ダークモード用カラー --- */
    --dark-bg-deep: #08080f;
    --dark-bg-primary: #0d0d18;
    --dark-bg-secondary: #161625;
    --dark-bg-tertiary: #1e1e32;
    --dark-bg-glass: rgba(255, 255, 255, 0.03);
    --dark-bg-glass-strong: rgba(255, 255, 255, 0.06);
    --dark-border-glass: rgba(255, 255, 255, 0.08);
    --dark-border-glass-light: rgba(255, 255, 255, 0.12);
    --dark-text-primary: #f0f0f5;
    --dark-text-secondary: #9898a8;
    --dark-text-muted: #5a5a6a;
    --dark-shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.3);
    --dark-shadow-glow: 0 0 40px rgba(124, 58, 237, 0.25);

    /* --- ライトモード用カラー --- */
    --light-bg-deep: #f5f5f7;
    --light-bg-primary: #ffffff;
    --light-bg-secondary: #f0f0f2;
    --light-bg-tertiary: #e8e8ec;
    --light-bg-glass: rgba(255, 255, 255, 0.7);
    --light-bg-glass-strong: rgba(255, 255, 255, 0.85);
    --light-border-glass: rgba(0, 0, 0, 0.08);
    --light-border-glass-light: rgba(0, 0, 0, 0.12);
    --light-text-primary: #1a1a2e;
    --light-text-secondary: #4a4a5a;
    --light-text-muted: #8a8a9a;
    --light-shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.08);
    --light-shadow-glow: 0 0 40px rgba(124, 58, 237, 0.15);

    /* --- 共通アクセントカラー --- */
    --accent-primary: #FBBC04;
    --accent-secondary: #E37400;
    --accent-success: #4285F4;

    /* --- その他共通設定 --- */
    --blur-glass: blur(20px);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* --- 現在のテーマ設定 (デフォルト: ダーク) --- */
    --bg-deep: var(--dark-bg-deep);
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --bg-glass: var(--dark-bg-glass);
    --bg-glass-strong: var(--dark-bg-glass-strong);
    --border-glass: var(--dark-border-glass);
    --border-glass-light: var(--dark-border-glass-light);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-muted: var(--dark-text-muted);
    --shadow-soft: var(--dark-shadow-soft);
    --shadow-glow: var(--dark-shadow-glow);
}

/* ライトモード設定 */
[data-theme="light"] {
    --bg-deep: var(--light-bg-deep);
    --bg-primary: var(--light-bg-primary);
    --bg-secondary: var(--light-bg-secondary);
    --bg-tertiary: var(--light-bg-tertiary);
    --bg-glass: var(--light-bg-glass);
    --bg-glass-strong: var(--light-bg-glass-strong);
    --border-glass: var(--light-border-glass);
    --border-glass-light: var(--light-border-glass-light);
    --text-primary: var(--light-text-primary);
    --text-secondary: var(--light-text-secondary);
    --text-muted: var(--light-text-muted);
    --shadow-soft: var(--light-shadow-soft);
    --shadow-glow: var(--light-shadow-glow);
}

/* リセット */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* アプリコンテナ */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2.5rem 2rem;
}

/* ヘッダー */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.header-content {
    text-align: left;
}

.header h1 {
    font-size: 2rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.icon-header {
    width: 32px;
    height: 32px;
    stroke: var(--accent-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* テーマ切り替え */
.theme-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.btn-theme {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-glass-strong);
    backdrop-filter: var(--blur-glass);
    border: 1px solid var(--border-glass-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.btn-theme:hover .theme-icon {
    stroke: white;
}

.theme-icon {
    width: 20px;
    height: 20px;
    stroke: var(--text-primary);
    display: none;
}

.theme-icon.active {
    display: block;
}

.theme-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* アイコンスタイル */
.icon-section {
    width: 18px;
    height: 18px;
    stroke: var(--accent-secondary);
    vertical-align: middle;
    margin-right: 0.5rem;
}

.icon-inline {
    width: 14px;
    height: 14px;
    stroke: var(--text-secondary);
    vertical-align: middle;
}

.icon-btn {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    vertical-align: middle;
    margin-right: 0.4rem;
}

.drop-icon {
    width: 64px;
    height: 64px;
    stroke: var(--accent-secondary);
    stroke-width: 1.5;
    margin-bottom: 1rem;
}

/* アップロードセクション */
.upload-section {
    margin-bottom: 2rem;
}

.drop-zone {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    /* ダークモードで見やすく明るく */
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

[data-theme="light"] .drop-zone {
    border-color: var(--border-glass);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent-primary);
    background: rgba(251, 188, 4, 0.1);
    box-shadow: 0 0 20px rgba(251, 188, 4, 0.2);
}

.drop-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
}

.drop-zone p {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.drop-hint {
    color: var(--text-muted) !important;
    font-size: 0.9rem !important;
    margin-top: 0.5rem;
}

/* エディタセクション */
.editor-section {
    margin-bottom: 2rem;
}

.editor-header {
    margin-bottom: 1rem;
}

.btn-change-video {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-change-video:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.editor-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 1024px) {
    .editor-layout {
        grid-template-columns: 1fr;
    }
}

/* 動画エリア */
.video-area {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.video-container {
    position: relative;
    background: transparent;
    /* 黒い縁が出るのを防ぐため透明に */
    border-radius: var(--radius-md);
    overflow: hidden;
    width: 100%;
    aspect-ratio: 16 / 9;
    transition: var(--transition);
}

.video-container.drag-over {
    outline: 3px dashed var(--accent-primary);
    outline-offset: -3px;
}

#video-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

#crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

/* 動画コンテナ内のドロップゾーン */
.video-drop-zone {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    backdrop-filter: blur(5px);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    z-index: 20;
}

[data-theme="light"] .video-drop-zone {
    border-color: var(--accent-primary);
}

.video-drop-zone:hover,
.video-drop-zone.drag-over {
    border-color: var(--accent-primary);
    background: rgba(251, 188, 4, 0.15);
}

.video-drop-zone.hidden {
    display: none;
}

.video-drop-zone .drop-icon {
    font-size: 3rem;
    margin-bottom: 0.75rem;
}

.video-drop-zone p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
}

.video-drop-zone .drop-hint {
    color: var(--text-muted) !important;
    font-size: 0.85rem !important;
    margin-top: 0.25rem;
}

/* 再アップロードボタン（動画読み込み後） */
.btn-reload-video {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 40px;
    height: 40px;
    background: var(--accent-secondary);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 15;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}

.btn-reload-video:hover {
    background: var(--accent-primary);
    opacity: 1;
    transform: scale(1.1);
}

.btn-reload-video.hidden {
    display: none;
}

/* 時間範囲コントロール */
.time-range-container {
    margin-top: 1rem;
}

.time-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-family: monospace;
}

.range-slider-container {
    padding: 0.5rem 0;
}

.range-track {
    position: relative;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    cursor: pointer;
}

.range-selected {
    position: absolute;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    pointer-events: none;
}

.range-handle {
    position: absolute;
    top: 50%;
    width: 18px;
    height: 18px;
    background: var(--text-primary);
    border: 3px solid var(--accent-primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: grab;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    z-index: 10;
}

.range-handle:hover,
.range-handle:active {
    transform: translate(-50%, -50%) scale(1.2);
    box-shadow: 0 0 10px var(--accent-primary);
}

.range-handle:active {
    cursor: grabbing;
}

.playback-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-icon {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

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

#playback-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    cursor: pointer;
}

#playback-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
}

/* 設定パネル */
.settings-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.settings-group {
    background: var(--bg-glass-strong);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    border: 1px solid var(--border-glass-light);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    transition: var(--transition);
}

.settings-group:hover {
    border-color: rgba(124, 58, 237, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

.settings-group h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

/* 入力フィールド */
.crop-inputs,
.time-inputs {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.input-row {
    display: flex;
    gap: 0.75rem;
}

.input-row label,
.time-inputs label {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

input[type="number"],
input[type="text"],
select {
    flex: 1;
    min-width: 0;
    max-width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(251, 188, 4, 0.2);
}

select {
    cursor: pointer;
}

.aspect-ratio-container {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
}

.aspect-ratio-container label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.aspect-ratio-container select {
    flex: 1;
    min-width: 120px;
}

.custom-ratio {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    margin-top: 0.5rem;
}

.custom-ratio input {
    width: 60px;
    text-align: center;
}

.custom-ratio span {
    color: var(--text-secondary);
}

/* 間隔コンテナ */
.interval-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.interval-container input {
    width: 100px;
}

.interval-container span {
    color: var(--text-secondary);
}

.info-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* ボタン */
.btn-primary,
.btn-secondary,
.btn-success {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-glass);
    margin-top: 0.75rem;
}

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

.btn-success {
    background: var(--accent-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.3);
}

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

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* プレビューセクション */
.preview-section {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.preview-section h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

#preview-count {
    color: var(--text-secondary);
    font-weight: 400;
}

.preview-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.preview-gallery::-webkit-scrollbar {
    width: 8px;
}

.preview-gallery::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.preview-gallery::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

.preview-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.preview-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: var(--transition);
}

.preview-item:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(251, 188, 4, 0.4);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-item .frame-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    text-align: center;
}

/* 実サイズ表示モーダル */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    max-width: 95vw;
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

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

#modal-image {
    max-width: 95vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

.modal-info {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: var(--bg-glass);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
}

/* モーダルナビゲーションボタン */
.modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-nav:hover {
    background: var(--accent-primary);
    transform: translateY(-50%) scale(1.1);
}

.modal-prev {
    left: -70px;
}

.modal-next {
    right: -70px;
}

@media (max-width: 768px) {
    .modal-prev {
        left: 10px;
    }

    .modal-next {
        right: 10px;
    }
}

/* プログレスバー */
.progress-container {
    margin-top: 1.5rem;
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    width: 0%;
    transition: width 0.3s ease;
}

#progress-text {
    text-align: center;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ユーティリティ */
.hidden {
    display: none !important;
}

/* アニメーション */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.editor-section:not(.hidden),
.preview-section:not(.hidden) {
    animation: fadeIn 0.4s ease;
}