/* --- 1. 核心變數與主題 (維持不變) --- */
:root {
    --main-hue: 250; 
    --primary: hsl(var(--main-hue), 85%, 65%);
    --primary-dark: hsl(var(--main-hue), 85%, 55%);
    --secondary: hsl(calc(var(--main-hue) + 35), 90%, 60%);
    --gradient-main: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-hover: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-body: #09090b;
    --bg-sidebar: rgba(18, 18, 20, 0.8);
    --bg-card: #141416;
    --text-main: #ffffff;
    --text-muted: #888890;
    --border-color: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(255, 255, 255, 0.03);
    --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
    --select-arrow-color: #ffffff;
    --input-hover-border: rgba(255, 255, 255, 0.3);
}

[data-theme="light"] {
    --bg-body: #f0f2f5;
    --bg-sidebar: rgba(255, 255, 255, 0.85);
    --bg-card: #ffffff;
    --text-main: #1a1a1a;
    --text-muted: #666666;
    --border-color: rgba(0, 0, 0, 0.1);
    --input-bg: #f8f9fa;
    --shadow-card: 0 8px 24px rgba(0,0,0,0.06);
    --select-arrow-color: #333333;
    --input-hover-border: rgba(0, 0, 0, 0.3);
}

/* --- 2. 基礎佈局與背景 (維持不變) --- */
body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    transition: background-color 0.4s var(--ease-smooth);
    overflow-x: hidden;
}

.bg-orb {
    position: fixed; top: -10%; right: -10%; width: 70vw; height: 70vw;
    background: radial-gradient(circle, var(--primary) 0%, transparent 65%);
    opacity: 0.15; filter: blur(90px); z-index: -1;
    transition: background 0.5s ease;
    animation: float 10s infinite ease-in-out alternate;
}
@keyframes float { 0% { transform: translateY(0); } 100% { transform: translateY(30px); } }

.app-container { display: flex; height: 100vh; }
.main-content { flex: 1; padding: 3rem; overflow-y: auto; }

/* --- 3. 側邊欄 (維持不變) --- */
.sidebar {
    width: 280px; background: var(--bg-sidebar); border-right: 1px solid var(--border-color);
    padding: 2rem; display: flex; flex-direction: column; backdrop-filter: blur(20px);
    transition: background 0.4s, border-color 0.4s;
}

.brand {
    font-size: 1.4rem; font-weight: 800; margin-bottom: 3rem; display: flex; align-items: center; gap: 12px;
    letter-spacing: 1px; color: var(--text-main);
}
.logo-icon { color: var(--primary); font-size: 1.6rem; filter: drop-shadow(0 0 8px var(--primary)); }

.menu { list-style: none; padding: 0; margin-bottom: auto; }
.menu li { margin-bottom: 8px; position: relative; }
.menu li a {
    display: flex; align-items: center; gap: 14px; padding: 14px 20px;
    color: var(--text-muted); text-decoration: none; border-radius: 8px;
    transition: 0.3s var(--ease-smooth); font-weight: 500;
    position: relative; overflow: hidden;
}
.menu li a:hover {
    color: var(--text-main);
    background: linear-gradient(90deg, var(--input-bg) 0%, transparent 100%);
}
.menu li.active a {
    color: var(--primary);
    background: linear-gradient(90deg, rgba(var(--primary), 0.1) 0%, transparent 100%);
}
.menu li.active::before {
    content: ''; position: absolute; left: 0; top: 15%; bottom: 15%; width: 4px;
    background: var(--primary); border-radius: 0 4px 4px 0;
    box-shadow: 0 0 10px var(--primary);
}

/* --- 4. 底部控制區 (修改為按鈕樣式) --- */
.theme-control {
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    display: flex; flex-direction: column; gap: 30px;
}
.control-row { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.control-col { display: flex; flex-direction: column; gap: 12px; }
.label { font-size: 0.75rem; text-transform: uppercase; color: var(--text-muted); font-weight: 600; letter-spacing: 1px; }

/* [修改] 新版圓形主題切換按鈕 */
.theme-btn {
    width: 40px; 
    height: 40px; 
    border-radius: 50%;
    border: 1px solid var(--border-color); 
    background: var(--input-bg);
    color: var(--text-muted); 
    cursor: pointer; 
    display: flex; 
    align-items: center; 
    justify-content: center;
    transition: 0.3s var(--ease-smooth);
    font-size: 1.2rem; /* 配合 Icon 大小 */
}

.theme-btn:hover { 
    color: var(--primary); 
    border-color: var(--primary); 
    background: rgba(var(--primary), 0.1);
    transform: rotate(15deg);
    box-shadow: 0 0 15px rgba(var(--primary), 0.3);
}

.theme-btn:active {
    transform: scale(0.9);
}

/* 顏色選擇器 */
.color-picker { display: flex; gap: 12px; }
.color-dot {
    width: 26px; height: 26px; border-radius: 50%; border: 2px solid transparent; cursor: pointer;
    background: hsl(var(--hue), 85%, 65%); transition: 0.3s var(--ease-bounce); position: relative;
}
.color-dot:hover { transform: scale(1.1); }
.color-dot.active { border-color: var(--text-main); transform: scale(1.15); }

/* --- 5. 卡片與標題 (維持不變) --- */
.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.header h1 { 
    margin: 0; font-size: 1.8rem;
    background: linear-gradient(90deg, var(--text-main) 0%, var(--text-muted) 40%, var(--primary) 50%, var(--text-muted) 60%, var(--text-main) 100%);
    background-size: 200% auto; color: transparent; -webkit-background-clip: text; background-clip: text;
    animation: shineText 5s linear infinite;
}
@keyframes shineText { to { background-position: 200% center; } }
.highlight { color: var(--primary); }

.user-profile { display: flex; align-items: center; gap: 15px; }
.notification-badge {
    position: relative; width: 40px; height: 40px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: var(--input-bg); border: 1px solid var(--border-color);
    transition: 0.3s var(--ease-smooth); cursor: pointer; color: var(--text-muted);
}
.notification-badge i { font-size: 1.2rem; }
.notification-badge:hover {
    color: var(--primary); border-color: var(--primary); 
    transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.notification-badge::after {
    content: ""; position: absolute; top: 8px; right: 10px;
    width: 8px; height: 8px; background: #ef4444; border-radius: 50%;
    border: 2px solid var(--bg-card);
}
.avatar {
    width: 40px; height: 40px; background: var(--gradient-main); border-radius: 50%;
    display: flex; align-items: center; justify-content: center; color: #fff; font-weight: bold;
}

.content-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; }
.card {
    background: var(--bg-card); padding: 2rem; border-radius: 20px;
    border: 1px solid var(--border-color); box-shadow: var(--shadow-card);
    transition: transform 0.3s var(--ease-smooth), border-color 0.3s;
}
.card:hover { transform: translateY(-4px); border-color: var(--primary); }

.card h3, .card-header h3 { 
    margin-top: 0; margin-bottom: 25px; 
    padding-bottom: 15px;
    font-size: 1.2rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.card-header { margin-bottom: 0; padding-bottom: 0; border: none; }
.subtitle { color: var(--text-muted); font-size: 0.9rem; margin-top: -15px; margin-bottom: 20px; display: block; }
.form-card { padding-top: 2rem; }

/* --- 6. Form 樣式 (維持不變) --- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 2rem; }

.input-floating { position: relative; margin-bottom: 5px; }
.input-floating.full-width { grid-column: 1 / -1; }

.input-floating input, .input-floating textarea {
    width: 100%; padding: 14px 16px; 
    background: var(--input-bg); border: 1px solid var(--border-color); border-radius: 12px;
    color: var(--text-main); font-size: 1rem; outline: none;
    transition: 0.3s; resize: none; box-sizing: border-box; 
}
.input-floating label {
    position: absolute; top: 14px; left: 16px;
    color: var(--text-muted); font-size: 0.95rem; pointer-events: none;
    transition: 0.3s var(--ease-smooth);
    background-color: transparent; padding: 0 4px;
}
.input-floating input:hover, .input-floating textarea:hover { border-color: var(--input-hover-border); }

.input-floating input:focus, .input-floating textarea:focus,
.input-floating input:not(:placeholder-shown), .input-floating textarea:not(:placeholder-shown) {
    border-color: var(--primary); background: transparent;
}
.input-floating input:focus ~ label, .input-floating textarea:focus ~ label,
.input-floating input:not(:placeholder-shown) ~ label, .input-floating textarea:not(:placeholder-shown) ~ label {
    top: -10px; left: 12px; font-size: 0.8rem; 
    color: var(--primary); background: var(--bg-card); font-weight: 600;
}

.focus-border {
    position: absolute; bottom: 4px; left: 50%; width: 0; height: 3px;
    background: var(--primary); transition: 0.4s var(--ease-bounce);
    transform: translateX(-50%); border-radius: 2px; opacity: 0; pointer-events: none;
}
.input-floating input:focus ~ .focus-border,
.input-floating textarea:focus ~ .focus-border { width: 40%; opacity: 1; }

/* --- 7. 下拉選單 (維持不變) --- */
.select-premium-wrapper { margin-bottom: 20px; }
.select-label { display: block; margin-bottom: 8px; font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }
.select-box { position: relative; width: 100%; }

.select-box select {
    width: 100%; padding: 14px 16px;
    font-size: 1rem; color: var(--text-main); cursor: pointer;
    background: var(--input-bg); border: 1px solid var(--border-color);
    border-radius: 12px; appearance: none; -webkit-appearance: none; transition: 0.3s;
}
.select-box select:hover { border-color: var(--input-hover-border); }
.select-box select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(var(--primary), 0.1); outline: none; }
.select-arrow {
    position: absolute; top: 0; bottom: 0; right: 0; width: 40px;
    display: flex; align-items: center; justify-content: center;
    pointer-events: none; color: var(--text-muted); transition: 0.3s;
}
.select-box select:focus + .select-arrow { color: var(--primary); transform: rotate(180deg); }

/* --- 8. 按鈕與佈局 (維持不變) --- */
.row { display: flex; gap: 15px; flex-wrap: wrap; }
.row-center { display: flex; gap: 30px; align-items: center; flex-wrap: wrap; } 

.btn {
    border: none; outline: none; border-radius: 10px;
    padding: 12px 28px; font-size: 0.95rem; font-weight: 600; letter-spacing: 0.5px;
    cursor: pointer; display: inline-flex; align-items: center; gap: 8px; justify-content: center;
    transition: transform 0.1s linear, box-shadow 0.3s ease, filter 0.3s ease, background 0.3s;
    position: relative; overflow: hidden;
}
.btn:active { transform: scale(0.96); }

.btn-primary {
    background: var(--gradient-main); color: #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.btn-primary:hover {
    background: var(--gradient-hover);
    box-shadow: 0 0 20px var(--primary);
    filter: brightness(1.1);
}

.btn-secondary {
    background: transparent; border: 1px solid var(--border-color); color: var(--text-main);
}
.btn-secondary:hover {
    border-color: var(--primary); color: var(--primary); background: var(--input-bg);
    box-shadow: 0 0 15px rgba(var(--primary), 0.2);
}

.btn-glow {
    background: rgba(0,0,0,0.3); color: #fff; border: 1px solid rgba(255,255,255,0.1);
}
.btn-glow i { color: var(--primary); }
.btn-glow:hover {
    border-color: var(--primary); 
    box-shadow: 0 0 25px var(--primary);
}

/* --- 9. Checkbox (維持不變) --- */
.custom-checkbox { 
    display: flex; align-items: center; 
    gap: 16px;
    cursor: pointer; user-select: none; 
}
.custom-checkbox input { display: none; }
.checkbox-box {
    width: 20px; height: 20px; border: 2px solid var(--border-color); border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    transition: 0.3s; background: var(--input-bg);
}
.checkbox-box svg { width: 14px; height: 14px; fill: none; stroke: white; stroke-width: 3; stroke-dasharray: 24; stroke-dashoffset: 24; transition: 0.3s ease; }
.custom-checkbox input:checked + .checkbox-box {
    background: var(--primary); border-color: var(--primary); transform: scale(1.05);
}
.custom-checkbox input:checked + .checkbox-box svg { stroke-dashoffset: 0; }
.custom-checkbox span { font-size: 0.9rem; color: var(--text-muted); }

/* --- 10. 生成器元件樣式 (維持不變) --- */
.control-group { margin-bottom: 25px; }

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    background: var(--input-bg);
    transition: 0.3s var(--ease-bounce);
    cursor: pointer;
    margin-bottom: 25px;
    position: relative;
    overflow: hidden;
}
.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(var(--primary), 0.03);
    transform: translateY(-2px);
}
.upload-icon {
    font-size: 3rem; color: var(--text-muted); margin-bottom: 10px; display: block;
    transition: 0.3s;
}
.upload-zone:hover .upload-icon { color: var(--primary); transform: scale(1.1); filter: drop-shadow(0 0 10px var(--primary)); }
.upload-text { font-weight: 600; color: var(--text-main); margin: 0 0 5px 0; }
.upload-hint { font-size: 0.8rem; color: var(--text-muted); }

/* Chips */
.chips-wrapper { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.chip {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.chip:hover {
    border-color: var(--primary);
    color: var(--text-main);
    background: rgba(var(--primary), 0.05);
}
.chip.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(var(--primary), 0.05);
    text-shadow: 0 0 8px var(--primary);
    box-shadow: 0 0 0 1px var(--primary) inset, 0 0 10px rgba(var(--primary), 0.3);
}

/* Btn Generate */
.btn-generate {
    background: var(--gradient-main);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    padding: 16px;
    border: none;
    border-radius: 12px;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
    overflow: hidden;
    box-shadow: 0 8px 20px -6px rgba(var(--primary), 0.6); 
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease, filter 0.3s ease;
}
.btn-generate::before {
    content: '';
    position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: 0.6s ease; z-index: -1;
}
.btn-generate:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px -5px rgba(var(--primary), 0.9);
    filter: brightness(1.1);
	box-shadow: 0 0 20px var(--primary);
}
.btn-generate:hover::before { left: 100%; }
.btn-generate:active {
    transform: scale(0.98); 
    box-shadow: 0 4px 15px -4px rgba(var(--primary), 0.5);
}
.btn-generate i {
    font-size: 1.2rem; margin-right: 8px; transition: 0.3s;
}
.btn-generate:hover i { transform: rotate(-15deg); }

/* Range Slider */
.slider-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.slider-value { 
    font-family: monospace; color: var(--primary); font-weight: bold; 
    background: var(--input-bg); padding: 2px 8px; border-radius: 4px;
}
.range-wrapper { position: relative; width: 100%; height: 24px; display: flex; align-items: center; }
.range-input { -webkit-appearance: none; width: 100%; background: transparent; cursor: pointer; }
.range-input::-webkit-slider-runnable-track {
    width: 100%; height: 6px; background: var(--input-bg); border-radius: 10px; border: 1px solid var(--border-color);
}
.range-input::-moz-range-track {
    width: 100%; height: 6px; background: var(--input-bg); border-radius: 10px; border: 1px solid var(--border-color);
}
.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px; width: 20px; border-radius: 50%;
    background: var(--primary);
    margin-top: -8px;
    box-shadow: 0 0 10px var(--primary);
    border: 2px solid var(--bg-card);
    transition: transform 0.2s, box-shadow 0.2s;
}
.range-input::-moz-range-thumb {
    height: 20px; width: 20px; border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--bg-card);
    box-shadow: 0 0 10px var(--primary);
    transition: transform 0.2s, box-shadow 0.2s;
}
.range-input:active::-webkit-slider-thumb { transform: scale(1.2); box-shadow: 0 0 20px var(--primary); }
.range-input:active::-moz-range-thumb { transform: scale(1.2); box-shadow: 0 0 20px var(--primary); }

/* Toggle Switch */
.toggle-switch {
    display: flex; align-items: center; gap: 12px; cursor: pointer; user-select: none;
}
.toggle-switch input { display: none; }
.toggle-slider {
    position: relative; width: 48px; height: 26px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 30px; transition: 0.3s;
}
.toggle-slider::before {
    content: ""; position: absolute; height: 18px; width: 18px;
    left: 4px; bottom: 3px;
    background-color: var(--text-muted);
    border-radius: 50%; transition: 0.3s var(--ease-bounce);
}
.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(var(--primary), 0.4);
}
.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.toggle-label { font-size: 0.95rem; color: var(--text-main); }