@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --light-bg: #f8f9fa;
    --dark-text: #343a40;
    --light-text: #6c757d;
    --border-color: #dee2e6;
    --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    --card-radius: 12px;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    margin: 0;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    background: #fff;
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

header {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f3f4f6, #e5e7eb);
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    margin: 0;
    font-size: 2.25rem;
    color: var(--dark-text);
}

header p {
    margin-top: 0.5rem;
    color: var(--light-text);
    font-size: 1.1rem;
}

main {
    padding: 2rem;
}

.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: var(--card-radius);
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
}

.upload-area:hover, .upload-area.dragover {
    background-color: #f1f7ff;
    border-color: var(--primary-color);
}

.upload-area .upload-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.upload-area p {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 500;
}

.upload-area .file-types {
    color: var(--light-text);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: block;
}

.controls-area, .result-area {
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    margin-top: 2rem;
    background-color: #fafafa;
}

.file-info {
    margin-bottom: 2rem;
    font-size: 1.1rem;
    word-break: break-all;
    line-height: 1.6;
}

.file-info strong {
    color: var(--dark-text);
}

.options {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.option-group {
    /* 这个类现在用于HTML中的逻辑分组，
       间距由父级.options flex容器处理 */
}

.options label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 1rem;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#quality-slider {
    flex-grow: 1;
}

.control-element {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    width: 100%; /* 使其占满宽度 */
}

#max-size-input {
    width: auto; /* 允许它更小 */
}

#compress-btn {
    margin-top: 1.5rem;
    padding: 0.75rem;
}

button, .download-btn {
    display: block;
    width: 100%;
    padding: 0.8rem 1rem;
    font-size: 1.1rem;
    font-weight: 500;
    color: #fff;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s, box-shadow 0.3s;
    margin-top: 2rem;
    text-decoration: none;
}

button:hover, .download-btn:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.2);
}

button:disabled {
    background-color: #a0a0a0;
    cursor: not-allowed;
    box-shadow: none;
}

.result-area h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 2rem;
}

#result-cards-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    flex-wrap: wrap;
}

.result-card-preview img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 4px;
    background-color: #f0f0f0;
    flex-shrink: 0;
}

.result-card-info {
    flex-grow: 1;
    min-width: 200px;
}

.result-card-info p {
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
    word-break: break-all;
}

.result-card-info strong {
    color: var(--dark-text);
}

.result-card-info .filename {
    font-weight: 700;
    font-size: 1rem;
    color: var(--dark-text);
}

.result-card-info .size-reduction {
    color: #28a745;
    font-weight: bold;
}

.result-card-actions .download-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    margin-top: 0; /* 覆盖默认边距 */
    display: inline-block;
    width: auto;
}

/* Cleanup old styles */
.result-details, #original-preview, #compressed-preview {
    display: none;
}

.result-summary {
    text-align: center;
    font-size: 1.2rem;
    padding: 1rem;
    background-color: #e9f5ff;
    border-radius: 8px;
    color: #0056b3;
    border: 1px solid #bde0ff;
}

.result-summary strong {
    font-size: 1.5rem;
}

.reset-btn {
    background-color: #6c757d;
    margin-top: 1rem;
}
.reset-btn:hover {
    background-color: #5a6268;
}

footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.9rem;
    color: var(--light-text);
}

/* --- Lightbox Styles --- */
.lightbox {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    cursor: default;
    animation: lightbox-zoom 0.3s ease;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: #bbb;
    text-decoration: none;
}

@keyframes lightbox-zoom {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Make preview clickable */
.result-card-preview {
    cursor: pointer;
}

/* 历史记录区域样式 */
.history-section {
    margin: 2rem 0;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.history-section h2 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.history-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.history-card {
    background: var(--bg-primary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.history-card:hover {
    transform: translateY(-2px);
}

.history-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.history-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
}

.history-info {
    padding: 1rem;
}

.history-info p {
    margin: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.history-info p:first-child {
    color: var(--text-primary);
    font-weight: bold;
}

@media (max-width: 768px) {
    .history-cards {
        grid-template-columns: 1fr;
    }
}