/* assets/css/style.css */

/* --- 根本性的布局修正 --- */
html {
    box-sizing: border-box;
}

*, *:before, *:after {
    box-sizing: inherit;
}

/* --- 变量和主题 --- */
:root {
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --background-color: #ffffff;
    --text-color: #212529;
    --accent-color: #007bff;
    --border-color: #dee2e6;
    --card-background: #f8f9fa;
    --success-color: #28a745;
    --error-color: #dc3545;
    --progress-bar-background: #e9ecef;
}

[data-theme="dark"] {
    --background-color: #121212;
    --text-color: #e0e0e0;
    --accent-color: #0d6efd;
    --border-color: #444;
    --card-background: #1e1e1e;
}

/* --- 全局和导航栏 --- */
body {
    font-family: var(--font-sans);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 头部和尾部 */
header, footer {
    flex-shrink: 0;
}
header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}
header a {
    color: var(--accent-color);
    text-decoration: none;
}
footer {
    text-align: center;
    padding: 1rem;
    color: #6c757d;
}

/* 主内容区域布局 */
.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
}

main.container {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-content {
    width: 100%;
    text-align: center;
}

hgroup {
    margin-bottom: 2rem;
}
hgroup h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}
hgroup h2 {
    font-size: 1.2rem;
    color: #6c757d;
    font-weight: normal;
}

/* 上传区域 */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: all 0.2s ease-in-out;
}
.upload-area.highlight {
    border-color: var(--accent-color);
    background-color: rgba(0, 123, 255, 0.05);
}
.upload-label {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 150px;
}
.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: 1rem;
    transition: transform 0.2s ease-in-out;
}
.upload-area:hover .upload-icon {
    transform: scale(1.1);
}
.upload-label span {
    font-size: 1.1rem;
}

/* 输出格式选择器 */
.output-format-selector {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
}

.output-format-selector select {
    /* 使用Pico.css的变量来保持风格一致 */
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.3rem 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
}

/* 上传结果区域 */
#upload-results {
    margin-top: 2rem;
    text-align: left;
}

.message {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.message.error {
    background-color: var(--error-color);
    color: white;
}
.message.warning {
    background-color: #ffc107;
    color: #212529;
}

.preview-container {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.preview-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}

.file-container {
    flex-grow: 1;
    overflow: hidden;
}
.file-container p {
    margin: 0;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    word-wrap: break-word;
    white-space: normal;
}

.link-title {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}
.link-title:hover {
    text-decoration: underline;
    color: #0056b3;
}

/* 进度条 */
.progress-bar {
    width: 100%;
    background-color: var(--progress-bar-background);
    border-radius: 4px;
    height: 8px;
    margin-top: 0.5rem;
    overflow: hidden;
}
.progress {
    width: 0;
    height: 100%;
    background-color: var(--accent-color);
    transition: width 0.2s ease-in-out, background-color 0.5s;
}

/* 链接和复制按钮 */
.link-container {
    margin-top: 0.5rem;
}
.link-container p {
    font-weight: bold;
    color: var(--success-color);
    margin-bottom: 0.5rem;
}
.link-container .input-group {
    display: flex;
}
.link-container input[type="text"] {
    flex-grow: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px 0 0 4px;
    background-color: var(--background-color);
    color: var(--text-color);
    border-right: none;
    min-width: 0;
}
.copy-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--accent-color);
    background-color: var(--accent-color);
    color: white;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color 0.2s;
    flex-shrink: 0;
}
.copy-btn:hover {
    background-color: #0056b3;
}
.copy-btn.copied {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

/* --- 隐藏元素 --- */
.hidden { display: none; }

/* --- 进度条 --- */
#progress-wrapper { margin-top: 1.5rem; }
progress { height: 8px; }

/* --- 结果区域 --- */
#result { margin-top: 1.5rem; }
#result h2 { font-size: 1.5rem; }
#result-image {
    max-width: 100%;
    max-height: 400px;
    margin-top: 1rem;
    border-radius: 8px;
    border: 1px solid #dddfe2;
}
#result-caption {
    font-size: 0.9em;
    color: #606770;
    margin-top: 0.5rem;
}
#result .grid {
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
    margin-top: 1rem;
}
#copy-button {
    background-color: var(--pico-primary);
}

/* --- 错误消息 --- */
#error-message {
    --pico-color: var(--pico-color-red-700);
    --pico-background-color: var(--pico-color-red-100);
    --pico-border-color: var(--pico-color-red-300);
}

/* --- 页脚 --- */
footer.container {
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9em;
}
footer a {
    color: var(--pico-primary);
    text-decoration: none;
}