/* 全域樣式 */
:root {
    --primary-color: #2d3748;
    --secondary-color: #4a5568;
    --accent-color: #667eea;
    --text-color: #1a202c;
    --bg-light: #f7fafc;
}

html {
    font-size: 14px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-color);
}

/* Navbar 樣式 */
.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.3s ease;
}

    .navbar-dark .navbar-nav .nav-link:hover {
        color: var(--accent-color);
    }

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
}

/* 作品卡片 */
.project-card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    background: white;
}

    .project-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15) !important;
    }

.project-image-container {
    position: relative;
    overflow: hidden;
    padding-top: 66.67%; /* 3:2 比例 */
}

.project-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.project-card:hover .project-image {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

/* 評分按鈕 */
.rating-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.rating-btn {
    min-width: 50px;
    transition: all 0.2s ease;
}

    .rating-btn:hover {
        transform: scale(1.1);
    }

    .rating-btn.active {
        background-color: var(--accent-color);
        border-color: var(--accent-color);
        color: white;
    }

/* 評分顯示 */
.rating-display {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

/* 評論區 */
.comments-list .card {
    border-left: 4px solid var(--accent-color);
}

/* 按鈕樣式 */
.btn {
    border-radius: 8px;
    padding: 8px 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
    }

/* Badge 樣式 */
.badge {
    padding: 6px 12px;
    font-weight: 500;
    border-radius: 6px;
}

/* 卡片陰影效果 */
.shadow-sm {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08) !important;
}

.shadow-lg {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12) !important;
}

/* Footer */
.footer {
    width: 100%;
    white-space: nowrap;
    padding: 20px 0;
}

    .footer a {
        text-decoration: none;
        transition: color 0.2s ease;
    }

        .footer a:hover {
            color: var(--accent-color) !important;
        }

/* 響應式調整 */
@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
    }

        .hero-section h1 {
            font-size: 2rem;
        }

    .rating-buttons {
        justify-content: center;
    }
}

/* 動畫效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.project-card {
    animation: fadeIn 0.5s ease-out;
}

/* 表單樣式 */
.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* 確保輸入欄位可以互動 */
.form-control {
    pointer-events: auto !important;
    user-select: auto !important;
    -webkit-user-select: auto !important;
    position: relative;
    z-index: 1;
}

/* Alert 樣式 */
.alert {
    border-radius: 8px;
    border: none;
}

/* 載入動畫 */
.project-image {
    opacity: 0;
    transition: opacity 0.3s ease;
}

    .project-image.loaded {
        opacity: 1;
    }

/* 分類按鈕群組 */
.btn-group .btn {
    border-radius: 0;
}

    .btn-group .btn:first-child {
        border-top-left-radius: 8px;
        border-bottom-left-radius: 8px;
    }

    .btn-group .btn:last-child {
        border-top-right-radius: 8px;
        border-bottom-right-radius: 8px;
    }

/* Dropdown 選單 */
.dropdown-menu {
    border-radius: 8px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.dropdown-item {
    transition: background-color 0.2s ease;
}

    .dropdown-item:hover {
        background-color: var(--bg-light);
    }

/* 卡片標題連結 */
.card-title a {
    transition: color 0.2s ease;
}

    .card-title a:hover {
        color: var(--accent-color) !important;
    }