/* ===== 音频格式转换器 专属样式 =====
   迪妙网络空间安全学院 · 反钓工具箱
   复用官网 style.css 变量与公共组件（navbar/footer/page-header/section） */

/* ===== 主体布局 ===== */
.tool-main {
    padding: 40px 0 80px;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

/* ===== 本地运行提示条 ===== */
.privacy-banner {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: linear-gradient(135deg, #e8f1ff 0%, #f0f5ff 100%);
    border: 1.5px solid rgba(26, 110, 255, 0.15);
    border-radius: var(--radius);
    padding: 18px 22px;
    margin-bottom: 28px;
}
.privacy-icon {
    width: 40px; height: 40px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.privacy-icon svg { width: 22px; height: 22px; color: white; }
.privacy-banner h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}
.privacy-banner p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 双栏布局 ===== */
.tool-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
    align-items: start;
}
.tool-left, .tool-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-width: 0;
}

/* ===== 引擎状态卡片 ===== */
.engine-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
}
.engine-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.engine-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}
.engine-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: #f59e0b;
    flex-shrink: 0;
    animation: engine-pulse 1.6s infinite;
}
.engine-dot.ready { background: #16a34a; animation: none; }
.engine-dot.error { background: #dc2626; animation: none; }
@keyframes engine-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}
.engine-retry {
    padding: 6px 14px;
    border: 1.5px solid var(--primary);
    background: var(--primary-light);
    color: var(--primary);
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.engine-retry:hover { background: var(--primary); color: white; }
.engine-progress {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
}
.engine-progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-warm);
    border-radius: 100px;
    overflow: hidden;
}
.engine-progress-bar span {
    display: block;
    height: 100%;
    width: 0%;
    background: var(--primary-gradient);
    border-radius: 100px;
    transition: width 0.3s ease;
}
.engine-progress-text {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    min-width: 38px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ===== 上传区 ===== */
.upload-zone {
    background: var(--bg-card);
    border: 2px dashed rgba(26, 110, 255, 0.3);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.upload-icon {
    width: 56px; height: 56px;
    color: var(--primary);
    margin-bottom: 16px;
}
.upload-zone h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}
.upload-zone > p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 12px;
}
.btn-browse {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(26, 110, 255, 0.3);
    transition: var(--transition);
    margin-bottom: 16px;
}
.btn-browse:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 110, 255, 0.4);
}
.upload-hint {
    font-size: 12px !important;
    color: var(--text-light) !important;
    margin-bottom: 0 !important;
    line-height: 1.7;
}

/* ===== 文件列表面板 ===== */
.file-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.file-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-warm);
}
.file-panel-head h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.file-count {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 10px;
    border-radius: 100px;
}
.btn-clear {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1.5px solid var(--border);
    background: white;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}
.btn-clear:hover {
    border-color: var(--danger);
    color: var(--danger);
    background: var(--danger-light);
}
.btn-clear:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}
.btn-clear:disabled:hover {
    border-color: var(--border);
    color: var(--text-secondary);
    background: white;
}
.file-list, .result-list {
    list-style: none;
    max-height: 420px;
    overflow-y: auto;
}
.file-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.file-item:last-child { border-bottom: none; }
.file-item:hover { background: var(--bg-warm); }
.file-item.converting { background: var(--primary-light); }
.file-icon {
    width: 40px; height: 40px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.5px;
}
.file-icon.done { background: #f0fdf4; color: #16a34a; }
.file-icon.error { background: #fef2f2; color: #dc2626; }
.file-info { flex: 1; min-width: 0; }
.file-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
}
.file-meta {
    font-size: 12px;
    color: var(--text-light);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.file-meta .arrow { color: var(--primary); font-weight: 700; }
.file-progress {
    height: 4px;
    background: var(--bg-warm);
    border-radius: 100px;
    margin-top: 8px;
    overflow: hidden;
    display: none;
}
.file-item.converting .file-progress { display: block; }
.file-progress span {
    display: block;
    height: 100%;
    width: 0%;
    background: var(--primary-gradient);
    border-radius: 100px;
    transition: width 0.25s ease;
}
.file-remove {
    width: 32px; height: 32px;
    border: none;
    background: transparent;
    color: var(--text-light);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
}
.file-remove:hover { background: var(--danger-light); color: var(--danger); }
.file-remove svg { width: 16px; height: 16px; }
.file-status {
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
    white-space: nowrap;
}
.file-status.waiting { color: var(--text-light); }
.file-status.done { color: #16a34a; }
.file-status.error { color: #dc2626; }
.file-status.converting { color: var(--primary); }
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 14px;
    border: none;
    background: #f0fdf4;
    color: #16a34a;
    font-family: inherit;
    font-size: 12px;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
    white-space: nowrap;
}
.btn-download:hover { background: #16a34a; color: white; }
.btn-download svg { width: 14px; height: 14px; }

/* ===== 设置卡片 ===== */
.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    position: sticky;
    top: 88px;
}
.settings-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 800;
    color: var(--text);
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.settings-title svg { color: var(--primary); }
.setting-group { margin-bottom: 20px; }
.setting-label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}
.format-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}
.format-option {
    position: relative;
}
.format-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.format-option label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 4px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}
.format-option label:hover { border-color: var(--primary); }
.format-option input:checked + label {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 4px 12px rgba(26, 110, 255, 0.15);
}
.format-option .fmt-name {
    font-size: 13px;
    font-weight: 800;
    color: var(--text);
}
.format-option input:checked + label .fmt-name { color: var(--primary); }
.format-option .fmt-desc {
    font-size: 10px;
    color: var(--text-light);
}
.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.chip {
    padding: 7px 14px;
    border: 1.5px solid var(--border);
    border-radius: 100px;
    background: white;
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: 0 3px 10px rgba(26, 110, 255, 0.3);
}
.btn-convert {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #ff6b35 0%, #ff4757 100%);
    color: white;
    font-family: inherit;
    font-size: 15px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
    transition: var(--transition);
    margin-top: 4px;
}
.btn-convert:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 107, 53, 0.4);
}
.btn-convert:disabled {
    background: #e2e8f0;
    color: var(--text-light);
    box-shadow: none;
    cursor: not-allowed;
}
.convert-note {
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
    line-height: 1.6;
}

/* ===== 结果面板 ===== */
.result-panel {
    margin-top: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

/* ===== 功能特点区 ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.feature-item {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}
.feature-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(26, 110, 255, 0.2);
}
.feature-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.feature-icon svg { width: 24px; height: 24px; color: var(--primary); }
.feature-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}
.feature-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== 移动端适配 ===== */
@media (max-width: 1024px) {
    .tool-layout { grid-template-columns: 1fr; }
    .settings-card { position: static; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .tool-main { padding: 24px 0 56px; }
    .privacy-banner {
        flex-direction: column;
        gap: 10px;
        padding: 16px;
    }
    .privacy-icon { width: 36px; height: 36px; }
    .upload-zone { padding: 36px 16px; }
    .upload-icon { width: 44px; height: 44px; }
    .upload-zone h3 { font-size: 16px; }
    .btn-browse { width: 100%; justify-content: center; }
    .file-item { padding: 12px 14px; gap: 10px; }
    .file-icon { width: 34px; height: 34px; font-size: 10px; }
    .settings-card { padding: 18px 16px; }
    .format-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
    .format-option label { padding: 8px 2px; }
    .format-option .fmt-name { font-size: 12px; }
    .format-option .fmt-desc { font-size: 9px; }
    .feature-grid { grid-template-columns: 1fr; }
    .feature-item { padding: 22px 18px; }
    .file-panel-head { padding: 14px 16px; }
}


/* ===== 移动端导航 / 页脚适配 =====
   官网公共 style.css 仅含桌面端规则，移动端规则在各页面内联样式中，
   此处与官网 index.html / drill.html 内联规则保持一致 */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0; right: 0;
        background: white;
        flex-direction: column;
        padding: 16px 24px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        gap: 4px;
        border-bottom: 1px solid var(--border);
        z-index: 999;
    }
    .nav-links.active { display: flex; }
    .mobile-toggle { display: flex; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}