@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;700&display=swap');
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Noto Sans TC", 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

a {
    text-decoration: none; /* 移除所有連結的底線 */

}

.controls {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.sort-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.sort-label {
    font-weight: 600;
    color: #333;
    margin-right: 10px;
}

.sort-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.sort-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.sort-btn.active {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    transform: scale(1.05);
}

.color-group {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
    transition: all 0.3s ease;
}

.color-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.group-header {
    padding: 20px;
    cursor: pointer;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.6));
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.group-header:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
}

.group-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: #333;
}

.toggle-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
    color: #666;
}

.group-header.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.color-grid {
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    /* grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); */
    gap: 15px;
    transition: all 0.3s ease;
    height: auto; 
    max-height: none;
    overflow: visible;
}

.color-grid.collapsed {
    /* display: none; */
    /* max-height: none; */
    max-height: 0;
    padding: 0 20px;
}

.color-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.color-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.color-block {
    height: 120px;
    width: 100%;
    position: relative;
    cursor: pointer;
}

.color-info {
    padding: 15px;
}

.color-code {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 8px;
    text-align: center;
}

.color-details {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.4;
}

.color-name {
    font-weight: 600;
    margin-bottom: 4px;
    text-align: center;
}

.hsv-info {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
    margin-top: 8px;
}

.hsv-item {
    text-align: center;
    padding: 4px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

.copy-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.copy-message.show {
    opacity: 1;
}

/* 字體規範樣式 */
.font-section {
    margin-top: 30px;
}

.font-guidelines-content {
    padding: 0;
}

.font-category {
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 10px;
    margin: 0 0 20px 0;
}

.font-category h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.3rem;
    border-bottom: 2px solid #0268b7;
    padding-bottom: 10px;
}

.font-demo {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 15px;
}

.font-name {
    font-weight: bold;
    color: #0268b7;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.font-sample {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 15px 0;
    color: #333;
}

.font-sample.serif {
    font-family: 'Noto Serif TC', serif;
}

.font-description {
    color: #666;
    font-size: 0.9rem;
}

.primary-font {
    border-left: 4px solid #0268b7;
}

.secondary-font {
    border-left: 4px solid #5ECBC3;
}

.font-demos {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.guidelines-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.guideline-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.guideline-item.correct {
    border-left: 4px solid #006833;
}

.guideline-item.incorrect {
    border-left: 4px solid #FC8561;
}

.guideline-title {
    font-weight: bold;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.guideline-item.correct .guideline-title {
    color: #006833;
}

.guideline-item.incorrect .guideline-title {
    color: #FC8561;
}

.logo-demo {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 15px 0;
    text-align: center;
    padding: 10px;
    background: #f0f0f0;
    border-radius: 4px;
}

.correct-spacing {
    letter-spacing: normal;
}

.incorrect-spacing {
    letter-spacing: -0.1em;
    color: #FC8561;
}

.guideline-text {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.5;
}

.color-usage-demos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.usage-demo {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.demo-title {
    padding: 15px;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.05);
    text-align: center;
}

.demo-bg {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.demo-bg.dark-bg {
    background: #25587F;
}

.demo-bg.light-bg {
    background: #f4f4f4;
}

.demo-bg.colorful-bg {
    background: linear-gradient(45deg, #5ECBC3, #0268b7);
}

.demo-logo {
    font-weight: 600;
    text-align: center;
    line-height: 1.3;
}

.white-text {
    color: white;
}

.black-text {
    color: #333;
}

.demo-desc {
    padding: 15px;
    font-size: 0.9rem;
    color: #666;
    text-align: center;
}

.spacing-demo {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.spacing-example {
    display: flex;
    align-items: center;
    gap: 30px;
}

.safe-area {
    padding: 40px;
    border: 2px dashed #0268b7;
    background: rgba(2, 104, 183, 0.05);
    border-radius: 8px;
    position: relative;
}

.safe-area::before {
    content: '淨空範圍';
    position: absolute;
    top: -10px;
    left: 20px;
    background: white;
    padding: 0 10px;
    color: #0268b7;
    font-size: 0.8rem;
    font-weight: 600;
}

.logo-placeholder {
    font-size: 1.5rem;
    font-weight: 600;
    color: #0268b7;
    text-align: center;
}

.spacing-note {
    flex: 1;
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .color-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 10px;
    }

    h1 {
        font-size: 2rem;
    }

    .group-title {
        font-size: 1.2rem;
    }

    .sort-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .sort-btn {
        margin: 5px 0;
    }

    .font-demos {
        grid-template-columns: 1fr;
    }

    .guidelines-grid {
        grid-template-columns: 1fr;
    }

    .color-usage-demos {
        grid-template-columns: 1fr;
    }

    .spacing-example {
        flex-direction: column;
        gap: 20px;
    }
}

#back-to-top {
    display: none; /* 預設隱藏 */
    position: fixed; /* 固定在視窗中 */
    bottom: 20px; /* 距離底部 20px */
    right: 20px; /* 距離右側 20px */
    background-color: #007bff; /* 背景顏色 */
    color: white; /* 文字顏色 */
    padding: 10px 15px; /* 內邊距 */
    border-radius: 5px; /* 圓角 */
    text-decoration: none; /* 移除下劃線 */
    font-size: 24px; /* 字體大小 */
    line-height: 1; /* 行高 */
    z-index: 1000; /* 確保按鈕在其他內容之上 */
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); /* 陰影效果 */
    transition: background-color 0.3s ease; /* 背景顏色過渡效果 */
}

#back-to-top:hover {
    background-color: #0056b3; /* 懸停時的背景顏色 */
}