/* ======================
   基本設定とリセット
====================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* フォントベースライン補正（視覚的中央調整） */
/* ※ヘッダー要素（.nav-link, .settings-btn）は除外 */
.mode-btn,
.start-btn,
.stop-btn,
.auto-btn,
.preset-btn,
.upload-btn,
.clear-btn,
.apply-btn,
.result-close,
.result-item,
.status-text,
.mode-label {
    transform: translateY(-3px);
}

:root {
    /* メインカラー */
    --primary-color: #FF6B35;
    --primary-dark: #E85A2A;
    --accent-color: #FFD700;

    /* 背景カラー */
    --bg-dark: #1a1a2e;
    --bg-darker: #0f0f1a;
    --bg-card: #2a2a4a;

    /* ネオンカラー */
    --neon-blue: #00D4FF;
    --neon-pink: #FF00FF;
    --neon-green: #00FF88;

    /* テキストカラー */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* シャドウ */
    --shadow-light: 0 2px 4px rgba(0,0,0,0.2);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.3);
    --shadow-heavy: 0 8px 16px rgba(0,0,0,0.4);
    --shadow-neon: 0 0 20px rgba(0,212,255,0.3);

    /* サイズ */
    --header-height: 70px;
    --sidebar-width: 350px;
    --border-radius: 12px;
    --border-radius-large: 20px;

    /* アニメーション */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 50%, #16213E 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ======================
   コンテナ
====================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ======================
   ヘッダー
====================== */
.header {
    height: var(--header-height);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    text-decoration: none;
    font-family: 'Orbitron', 'Noto Sans JP', sans-serif;
    font-size: 1.2rem;
    font-weight: 900;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-cta {
    display: flex;
    gap: 10px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 8px;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.settings-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    font-family: inherit;
}

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

.settings-btn .material-icons {
    font-size: 18px;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ======================
   メインコンテンツ
====================== */
.main-content {
    padding-top: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ======================
   設定パネル (サイドバー)
====================== */
.settings-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(180deg, #2a2a4a 0%, #1a1a2e 100%);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
    z-index: 1100;
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    overflow-y: auto;
    visibility: hidden;
}

.settings-panel.active {
    transform: translateX(0);
    visibility: visible;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    position: sticky;
    top: 0;
    z-index: 10;
}

.settings-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.close-settings {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-primary);
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-settings:hover {
    background: rgba(255, 255, 255, 0.3);
}

.settings-content {
    padding: 20px;
}

.setting-group {
    margin-bottom: 30px;
}

.setting-group h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
}

/* ======================
   フォーム要素
====================== */
.segment-textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    resize: vertical;
    transition: var(--transition-fast);
}

.segment-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

.segment-textarea::placeholder {
    color: var(--text-muted);
}

.segment-info {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: right;
}

/* タイトル入力 */
.title-input {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    font-weight: bold;
    transition: var(--transition-fast);
}

.title-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

.title-input::placeholder {
    color: var(--text-muted);
    font-weight: normal;
}

.input-hint {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ======================
   色設定
====================== */
.color-setting {
    margin-bottom: 20px;
}

.color-setting label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.color-setting input[type="color"] {
    width: 60px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    cursor: pointer;
    background: none;
    padding: 2px;
}

.color-setting input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-setting input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 8px;
}

/* ======================
   背景画像設定
====================== */
.background-preview {
    width: 100%;
    height: 120px;
    background: rgba(0, 0, 0, 0.3);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.85rem;
    background-size: cover;
    background-position: center;
    transition: var(--transition-fast);
    margin-bottom: 15px;
}

.background-preview .material-icons {
    font-size: 32px;
    opacity: 0.5;
}

.background-preview.has-image {
    border-style: solid;
    border-color: var(--primary-color);
}

.background-preview.has-image span {
    display: none;
}

.background-buttons {
    display: flex;
    gap: 10px;
}

.background-buttons .upload-btn,
.background-buttons .clear-btn {
    flex: 1;
    margin: 0;
}

/* ======================
   ボタン
====================== */
.upload-btn, .clear-btn, .preset-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: inherit;
    font-size: 0.9rem;
    margin: 5px;
}

.upload-btn:hover, .clear-btn:hover, .preset-btn:hover {
    border-color: var(--primary-color);
    background: rgba(255, 107, 53, 0.1);
}

.apply-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
}

.apply-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.4);
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.preset-buttons .preset-btn {
    width: 100%;
    margin: 0;
}

/* ======================
   トグルスイッチ
====================== */
.toggle-setting {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 56px;
    height: 30px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-medium);
    border-radius: 30px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 2px;
    background: white;
    transition: var(--transition-medium);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.toggle-switch input:checked + .toggle-slider {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

.toggle-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toggle-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.toggle-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ======================
   モード選択
====================== */
.mode-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.mode-option {
    flex: 1;
    cursor: pointer;
}

.mode-option input {
    display: none;
}

.mode-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.mode-label .mode-icon {
    font-size: 24px;
}

.mode-option input:checked + .mode-label {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
    color: var(--text-primary);
    box-shadow: 0 5px 20px rgba(255, 107, 53, 0.3);
}

.mode-option:hover .mode-label {
    border-color: rgba(255, 255, 255, 0.3);
}

/* ======================
   オーバーレイ
====================== */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ======================
   モーダル
====================== */
.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.7);
    background: linear-gradient(180deg, #2a2a4a 0%, #1a1a2e 100%);
    border-radius: var(--border-radius-large);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    z-index: 1200;
    max-width: 500px;
    width: 90vw;
    max-height: 80vh;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.modal.active {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    visibility: visible;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.modal-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
}

.close-modal {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-primary);
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    background: rgba(255, 255, 255, 0.3);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    max-height: 60vh;
    color: var(--text-secondary);
}

.modal-body ol {
    padding-left: 20px;
}

.modal-body li {
    margin-bottom: 12px;
    line-height: 1.6;
}

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

.text-center {
    text-align: center;
}

.text-accent {
    color: var(--accent-color);
}

.text-neon-blue {
    color: var(--neon-blue);
}

.text-neon-pink {
    color: var(--neon-pink);
}

/* ======================
   アニメーション
====================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-medium);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 40px rgba(255, 215, 0, 0.8);
    }
}