/* ========================================
   GitHub 加速下载器 - Material Design 风格
   ======================================== */

/* ===== CSS 变量（主题） ===== */
:root,
[data-theme="light"] {
    --md-sys-color-primary: #6750A4;
    --md-sys-color-on-primary: #FFFFFF;
    --md-sys-color-primary-container: #EADDFF;
    --md-sys-color-on-primary-container: #21005D;

    --md-sys-color-secondary: #625B71;
    --md-sys-color-on-secondary: #FFFFFF;
    --md-sys-color-secondary-container: #E8DEF8;
    --md-sys-color-on-secondary-container: #1D192B;

    --md-sys-color-surface: #FFFBFE;
    --md-sys-color-on-surface: #1C1B1F;
    --md-sys-color-surface-variant: #E7E0EC;
    --md-sys-color-on-surface-variant: #49454F;

    --md-sys-color-background: #F5F0FF;
    --md-sys-color-on-background: #1C1B1F;

    --md-sys-color-outline: #79747E;
    --md-sys-color-outline-variant: #CAC4D0;

    --md-sys-color-error: #B3261E;
    --md-sys-color-on-error: #FFFFFF;
    --md-sys-color-error-container: #F9DEDC;
    --md-sys-color-on-error-container: #410E0B;

    --md-sys-color-success: #2E7D32;
    --md-sys-color-success-container: #C8E6C9;
    --md-sys-color-warning: #F57F17;
    --md-sys-color-warning-container: #FFF8E1;

    --md-sys-elevation-0: 0 0 0 0 rgba(0,0,0,0);
    --md-sys-elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
    --md-sys-elevation-2: 0 3px 6px rgba(0,0,0,0.14), 0 2px 4px rgba(0,0,0,0.10);
    --md-sys-elevation-3: 0 6px 12px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.12);
    --md-sys-elevation-4: 0 8px 16px rgba(0,0,0,0.18), 0 4px 8px rgba(0,0,0,0.14);

    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-full: 9999px;

    --md-sys-typescale-body-medium: 400 14px/20px 'Segoe UI', system-ui, -apple-system, sans-serif;
    --md-sys-typescale-label-large: 500 14px/20px 'Segoe UI', system-ui, -apple-system, sans-serif;
    --md-sys-typescale-title-medium: 500 16px/24px 'Segoe UI', system-ui, -apple-system, sans-serif;
    --md-sys-typescale-title-large: 500 22px/28px 'Segoe UI', system-ui, -apple-system, sans-serif;
    --md-sys-typescale-headline-medium: 400 28px/36px 'Segoe UI', system-ui, -apple-system, sans-serif;

    --card-bg: #FFFFFF;
    --card-border: 1px solid rgba(0,0,0,0.08);
    --input-bg: #FFFFFF;
    --input-border: 2px solid #E0E0E0;
    --input-focus-border: 2px solid var(--md-sys-color-primary);
    --text-muted: #6B7280;
    --release-body-bg: #F8F6FF;
    --hover-bg: rgba(103, 80, 164, 0.06);
    --body-bg: #F5F0FF;
}

[data-theme="dark"] {
    --md-sys-color-primary: #D0BCFF;
    --md-sys-color-on-primary: #381E72;
    --md-sys-color-primary-container: #4F378B;
    --md-sys-color-on-primary-container: #EADDFF;

    --md-sys-color-secondary: #CCC2DC;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-secondary-container: #4A4458;
    --md-sys-color-on-secondary-container: #E8DEF8;

    --md-sys-color-surface: #1C1B1F;
    --md-sys-color-on-surface: #E6E1E5;
    --md-sys-color-surface-variant: #49454F;
    --md-sys-color-on-surface-variant: #CAC4D0;

    --md-sys-color-background: #141218;
    --md-sys-color-on-background: #E6E1E5;

    --md-sys-color-outline: #938F99;
    --md-sys-color-outline-variant: #49454F;

    --md-sys-color-error: #F2B8B5;
    --md-sys-color-on-error: #601410;
    --md-sys-color-error-container: #8C1D18;
    --md-sys-color-on-error-container: #F9DEDC;

    --md-sys-color-success: #81C784;
    --md-sys-color-success-container: #1B5E20;
    --md-sys-color-warning: #FFB74D;
    --md-sys-color-warning-container: #E65100;

    --md-sys-elevation-0: 0 0 0 0 rgba(0,0,0,0);
    --md-sys-elevation-1: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
    --md-sys-elevation-2: 0 3px 6px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.4);
    --md-sys-elevation-3: 0 6px 12px rgba(0,0,0,0.6), 0 3px 6px rgba(0,0,0,0.5);
    --md-sys-elevation-4: 0 8px 16px rgba(0,0,0,0.7), 0 4px 8px rgba(0,0,0,0.6);

    --card-bg: #1E1C22;
    --card-border: 1px solid rgba(255,255,255,0.08);
    --input-bg: #2B2930;
    --input-border: 2px solid #3D3B43;
    --input-focus-border: 2px solid var(--md-sys-color-primary);
    --text-muted: #9E9BA6;
    --release-body-bg: #2B2930;
    --hover-bg: rgba(208, 188, 255, 0.08);
    --body-bg: #141218;
}

/* ===== 全局重置 ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface);
    background-color: var(--body-bg);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--md-sys-color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ===== 容器 ===== */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 16px 80px;
}

/* ===== 页面头部 ===== */
.page-header {
    text-align: center;
    margin-bottom: 32px;
}

.page-header h1 {
    font: var(--md-sys-typescale-headline-medium);
    color: var(--md-sys-color-primary);
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 15px;
}

/* ===== 卡片 ===== */
.card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--md-sys-shape-corner-large);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--md-sys-elevation-1);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: var(--md-sys-elevation-2);
}

/* ===== 区块标题 ===== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h2 {
    font: var(--md-sys-typescale-title-large);
    color: var(--md-sys-color-on-surface);
}

/* ===== 徽章 ===== */
.badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--md-sys-shape-corner-full);
    line-height: 1.5;
}

.badge-success {
    background-color: var(--md-sys-color-success-container);
    color: var(--md-sys-color-success);
}

.badge-warning {
    background-color: var(--md-sys-color-warning-container);
    color: var(--md-sys-color-warning);
}

/* ===== 表单控件 ===== */
.form-input {
    width: 100%;
    font: var(--md-sys-typescale-body-medium);
    padding: 10px 16px;
    border: var(--input-border);
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--input-bg);
    color: var(--md-sys-color-on-surface);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus {
    border-color: var(--md-sys-color-primary);
    box-shadow: 0 0 0 3px rgba(103, 80, 164, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input-lg {
    padding: 14px 20px;
    font-size: 16px;
}

.form-select {
    width: 100%;
    font: var(--md-sys-typescale-body-medium);
    padding: 10px 16px;
    border: var(--input-border);
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--input-bg);
    color: var(--md-sys-color-on-surface);
    outline: none;
    cursor: pointer;
    appearance: auto;
    transition: border-color 0.2s ease;
}

.form-select:focus {
    border-color: var(--md-sys-color-primary);
    box-shadow: 0 0 0 3px rgba(103, 80, 164, 0.15);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font: var(--md-sys-typescale-label-large);
    padding: 10px 24px;
    border: none;
    border-radius: var(--md-sys-shape-corner-small);
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, #7C6FBE 100%);
    color: var(--md-sys-color-on-primary);
    box-shadow: var(--md-sys-elevation-1);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--md-sys-elevation-2);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--md-sys-elevation-1);
}

.btn-outline {
    background: transparent;
    color: var(--md-sys-color-primary);
    border: 1px solid var(--md-sys-color-outline);
}

.btn-outline:hover:not(:disabled) {
    background: var(--hover-bg);
    border-color: var(--md-sys-color-primary);
}

.btn-sm {
    padding: 8px 14px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

/* ===== 代理配置 ===== */
.proxy-section {
    position: relative;
}

.proxy-select-row {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.proxy-select-row .form-select {
    flex: 1;
}

.proxy-input-row {
    display: flex;
    gap: 8px;
}

.proxy-input-row .form-input {
    flex: 1;
}

.proxy-current {
    margin-top: 14px;
    font-size: 13px;
    color: var(--text-muted);
    word-break: break-all;
}

.proxy-current span {
    color: var(--md-sys-color-primary);
    font-weight: 500;
}

/* ===== 仓库查询 ===== */
.repo-input-row {
    display: flex;
    gap: 12px;
}

.repo-input-row .form-input {
    flex: 1;
}

.repo-hint {
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-muted);
}

.repo-hint code {
    background: var(--md-sys-color-surface-variant);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}

/* ===== 内置快捷入口 ===== */
.quick-repos {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--md-sys-color-outline-variant);
}

.quick-repos-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.quick-repos-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 4px;
}

.btn-repo-quick {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--card-bg);
    cursor: pointer;
    transition: all 0.25s ease;
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface);
    text-align: left;
}

.btn-repo-quick:hover {
    background: var(--hover-bg);
    border-color: var(--md-sys-color-primary);
    box-shadow: var(--md-sys-elevation-1);
    transform: translateY(-1px);
}

.repo-quick-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.repo-quick-name {
    font-weight: 600;
    font-size: 14px;
}

.repo-quick-repo {
    font-size: 12px;
    color: var(--text-muted);
    padding: 1px 6px;
    background: var(--release-body-bg);
    border-radius: 4px;
}

/* ===== 仓库信息 ===== */
.repo-info {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 20px 24px;
    margin-bottom: 20px;
    box-shadow: var(--md-sys-elevation-1);
}

.repo-info-header h3 {
    font: var(--md-sys-typescale-title-medium);
    margin-bottom: 10px;
}

.repo-info-header h3 a {
    color: var(--md-sys-color-on-surface);
}

.repo-info-header h3 a:hover {
    color: var(--md-sys-color-primary);
}

.repo-desc {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 10px;
    line-height: 1.5;
}

.repo-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.stat {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== Releases 标题 ===== */
.releases-title {
    font: var(--md-sys-typescale-title-medium);
    margin-bottom: 16px;
    color: var(--md-sys-color-on-surface);
}

/* ===== Release 卡片 ===== */
.release-card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--md-sys-elevation-1);
    transition: all 0.3s ease;
}

.release-card:hover {
    box-shadow: var(--md-sys-elevation-2);
}

.release-card-latest {
    border-left: 4px solid var(--md-sys-color-primary);
}

/* 头部 */
.release-header {
    margin-bottom: 14px;
}

.release-tag-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.release-tag {
    font: var(--md-sys-typescale-title-medium);
    color: var(--md-sys-color-primary);
    font-weight: 600;
}

.release-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.release-name {
    font-size: 15px;
    color: var(--md-sys-color-on-surface);
}

.release-date {
    font-size: 13px;
    color: var(--text-muted);
}

/* 更新日志 */
.release-body {
    background: var(--release-body-bg);
    border-radius: var(--md-sys-shape-corner-small);
    padding: 16px;
    margin-bottom: 16px;
    max-height: 240px;
    overflow-y: auto;
    font-size: 13px;
    line-height: 1.7;
}

.release-body::-webkit-scrollbar {
    width: 4px;
}

.release-body::-webkit-scrollbar-track {
    background: transparent;
}

.release-body::-webkit-scrollbar-thumb {
    background: var(--md-sys-color-outline-variant);
    border-radius: 2px;
}

.changelog h4 {
    font-size: 14px;
    font-weight: 700;
    margin: 10px 0 6px;
    color: var(--md-sys-color-on-surface);
}

.changelog h5 {
    font-size: 13px;
    font-weight: 700;
    margin: 8px 0 4px;
    color: var(--md-sys-color-on-surface);
}

.changelog ul {
    margin: 4px 0 8px;
    padding-left: 20px;
}

.changelog li {
    margin-bottom: 3px;
}

.changelog code {
    background: var(--md-sys-color-surface-variant);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 12px;
}

.changelog a {
    color: var(--md-sys-color-primary);
}

.text-muted {
    color: var(--text-muted);
    font-style: italic;
}

/* 下载文件列表 */
.assets-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--md-sys-color-on-surface);
}

.assets-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.release-assets-empty {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
    padding: 12px 0;
}

/* 下载项 */
.asset-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--release-body-bg);
    transition: all 0.25s ease;
    text-decoration: none;
    color: var(--md-sys-color-on-surface);
    cursor: pointer;
}

.asset-item:hover {
    background: var(--hover-bg);
    transform: translateX(4px);
    text-decoration: none;
    box-shadow: var(--md-sys-elevation-1);
}

.asset-icon {
    flex-shrink: 0;
    font-size: 20px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--md-sys-color-primary-container);
    border-radius: var(--md-sys-shape-corner-small);
}

.asset-info {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.asset-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 500;
}

.asset-size {
    flex-shrink: 0;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--card-bg);
    padding: 2px 10px;
    border-radius: var(--md-sys-shape-corner-full);
    font-weight: 500;
}

/* ===== 加载动画 ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px 0;
    color: var(--text-muted);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--md-sys-color-outline-variant);
    border-top-color: var(--md-sys-color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== 提示消息 ===== */
.alert {
    padding: 14px 18px;
    border-radius: var(--md-sys-shape-corner-small);
    margin-bottom: 16px;
    font: var(--md-sys-typescale-body-medium);
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error {
    background: var(--md-sys-color-error-container);
    color: var(--md-sys-color-on-error-container);
    border: 1px solid var(--md-sys-color-error);
}

.alert-success {
    background: var(--md-sys-color-success-container);
    color: var(--md-sys-color-success);
    border: 1px solid var(--md-sys-color-success);
}

.alert-info {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border: 1px solid var(--md-sys-color-primary);
}

/* ===== 主题切换按钮 ===== */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--card-bg);
    box-shadow: var(--md-sys-elevation-2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.3s ease;
    z-index: 100;
    color: var(--md-sys-color-on-surface);
}

.theme-toggle:hover {
    box-shadow: var(--md-sys-elevation-3);
    transform: scale(1.1);
}

/* ===== 响应式 ===== */
@media (max-width: 640px) {
    .container {
        padding: 16px 12px 60px;
    }

    .card {
        padding: 16px;
    }

    .repo-input-row {
        flex-direction: column;
    }

    .proxy-input-row {
        flex-direction: column;
    }
    
    .local-proxy-controls {
        flex-direction: column;
        gap: 12px;
    }
    
    .local-proxy-btns {
        flex-direction: column !important;
    }
    
    .local-proxy-btns .btn {
        width: 100%;
        justify-content: center;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .release-card {
        padding: 16px;
    }

    .asset-info {
        flex-direction: column;
        gap: 4px;
        align-items: flex-start;
    }

    .release-meta {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ===== 本地代理区域 ===== */
.local-proxy-section {
    margin-bottom: 20px;
}

.proxy-info-content {
    padding: 14px 0;
}

.proxy-status-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font: var(--md-sys-typescale-body-medium);
}

.proxy-status-row:last-child {
    margin-bottom: 0;
}

.status-label {
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
}

.local-proxy-status {
    padding: 4px 12px;
    border-radius: var(--md-sys-shape-corner-full);
    font-size: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.local-proxy-status.running {
    background: var(--md-sys-color-success);
    color: white;
}

.local-proxy-status.stopped {
    background: var(--md-sys-color-outline);
    color: white;
}

.proxy-url-text {
    color: var(--md-sys-color-primary);
    font-weight: 500;
}

.code-text {
    background: var(--md-sys-color-surface-variant);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    color: var(--md-sys-color-on-surface-variant);
}

.proxy-tips {
    background: var(--md-sys-color-primary-container);
    padding: 12px 16px;
    border-radius: var(--md-sys-shape-corner-small);
    margin-top: 16px;
}

.proxy-tips p {
    margin: 6px 0;
    font-size: 13px;
    color: var(--md-sys-color-on-primary-container);
}

.proxy-tips p:first-child {
    margin-top: 0;
}

.proxy-tips p:last-child {
    margin-bottom: 0;
}

.third-party-proxies {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid rgba(103, 80, 164, 0.15);
}

.third-party-proxies h3 {
    font: var(--md-sys-typescale-title-medium);
    margin: 0 0 14px 0;
    color: var(--md-sys-color-on-surface);
    font-size: 16px;
}
        gap: 2px;
    }
}

@media (max-width: 480px) {
    .proxy-select-row {
        flex-direction: column;
    }

    .repo-stats {
        flex-direction: column;
        gap: 4px;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .theme-toggle { display: none; }
}