/* 音频格式转换 /tools/audio_convert —— class 前缀 ac-，沿用站点主题变量自动适配深浅色 */

.ac-app { max-width: none; margin: 0; padding: 22px 20px 56px; box-sizing: border-box; }

/* ---------- Hero ---------- */
.ac-hero { text-align: center; padding: 26px 12px 20px; }
.ac-hero h1 { margin: 0 0 10px; font-size: 30px; line-height: 1.25; font-weight: 800; color: var(--text-primary); }
.ac-hero-sub { margin: 0 auto 16px; max-width: 680px; font-size: 15px; line-height: 1.7; color: var(--text-secondary); }
.ac-badges { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.ac-badge {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 12.5px; padding: 5px 12px; border-radius: 999px;
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
}

/* ---------- 上传区 ---------- */
.ac-drop {
    border: 2px dashed var(--border); border-radius: 20px; background: var(--bg-secondary);
    padding: 44px 20px; text-align: center; cursor: pointer;
    transition: border-color .18s, background .18s, box-shadow .18s;
}
.ac-drop:hover { border-color: var(--accent); }
.ac-drop.is-over {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 7%, var(--bg-secondary));
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 10%, transparent);
}
.ac-drop-ic { font-size: 42px; line-height: 1; margin-bottom: 12px; }
.ac-drop-title { font-size: 17px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.ac-drop-sub { font-size: 13.5px; color: var(--text-secondary); margin-bottom: 16px; }
.ac-drop-fmt { margin-top: 14px; font-size: 12px; line-height: 1.7; color: var(--text-secondary); opacity: .85; }

/* ---------- 通过链接添加 ---------- */
.ac-url-wrap { margin: 20px auto 0; max-width: 640px; padding-top: 18px; border-top: 1px dashed var(--border); text-align: left; }
.ac-url-row { display: flex; gap: 8px; align-items: stretch; }
.ac-url-input {
    flex: 1 1 auto; min-width: 0;
    border: 1px solid var(--border); background: var(--bg-primary); color: var(--text-primary);
    border-radius: 9px; padding: 9px 11px; font-size: 14px; font-family: inherit; outline: none;
}
.ac-url-input:focus { border-color: var(--accent); }
.ac-url-row .ac-btn { flex: 0 0 auto; white-space: nowrap; }
.ac-url-name { display: block; margin-top: 8px; font-size: 12.5px; color: var(--text-secondary); word-break: break-all; }
.ac-url-name.is-ok { color: var(--accent); }
.ac-url-tip { margin-top: 8px; font-size: 12px; line-height: 1.7; color: var(--text-secondary); }

/* ---------- 按钮 ---------- */
.ac-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    border: 1px solid var(--border); background: var(--bg-primary); color: var(--text-primary);
    font-size: 14px; font-weight: 600; padding: 10px 18px; border-radius: 10px; cursor: pointer;
    transition: background .15s, border-color .15s, transform .08s;
}
.ac-btn:hover { border-color: var(--accent); color: var(--accent); }
.ac-btn:active { transform: translateY(1px); }
.ac-btn-pri { background: var(--accent); border-color: var(--accent); color: #fff; }
.ac-btn-pri:hover { color: #fff; opacity: .92; }
.ac-btn-pri:disabled { opacity: .55; cursor: not-allowed; }
.ac-btn-sm { padding: 7px 13px; font-size: 13px; border-radius: 8px; }

/* ---------- 工作区 ---------- */
.ac-work { margin-top: 18px; }
.ac-card {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: 16px; padding: 16px 18px; margin-bottom: 14px;
}
.ac-card-title { margin: 0 0 12px; font-size: 15px; font-weight: 700; color: var(--text-primary); }
.ac-file { display: flex; gap: 12px; align-items: center; }
.ac-file-info { flex: 1 1 auto; min-width: 0; }
.ac-file-name { font-size: 15px; font-weight: 700; color: var(--text-primary); word-break: break-all; margin-bottom: 4px; }
.ac-file-meta { font-size: 12.5px; color: var(--text-secondary); }

/* ---------- 格式网格 ---------- */
.ac-fmt-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 9px;
}
.ac-fmt {
    border: 1px solid var(--border); background: var(--bg-primary); color: var(--text-primary);
    border-radius: 11px; padding: 10px 8px; cursor: pointer; text-align: center;
    transition: border-color .15s, background .15s, color .15s;
}
.ac-fmt:hover:not(:disabled) { border-color: var(--accent); }
.ac-fmt.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
.ac-fmt:disabled { opacity: .42; cursor: not-allowed; }
.ac-fmt-n { display: block; font-size: 14px; font-weight: 700; letter-spacing: .3px; }
.ac-fmt-d { display: block; margin-top: 3px; font-size: 11px; opacity: .8; line-height: 1.4; }
.ac-fmt-note { margin: 10px 0 0; font-size: 12.5px; color: var(--accent); }

/* ---------- 设置 ---------- */
.ac-grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 18px; }
.ac-row { display: flex; flex-direction: column; gap: 7px; }
.ac-row > label, .ac-lbl { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.ac-select {
    width: 100%; box-sizing: border-box; border: 1px solid var(--border);
    background: var(--bg-primary); color: var(--text-primary);
    border-radius: 9px; padding: 9px 11px; font-size: 14px; font-family: inherit; outline: none;
}
.ac-select:focus { border-color: var(--accent); }
.ac-hintbox {
    margin-top: 12px; padding: 10px 12px; border-radius: 10px;
    background: color-mix(in srgb, var(--accent) 8%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
    font-size: 12.5px; line-height: 1.65; color: var(--text-secondary);
}

/* ---------- 进度 / 状态 ---------- */
.ac-progress { margin-top: 14px; }
.ac-bar { height: 8px; border-radius: 999px; background: var(--border); overflow: hidden; }
.ac-bar > i { display: block; height: 100%; width: 0; border-radius: 999px; background: var(--accent); transition: width .25s; }
.ac-prog-txt { display: block; margin-top: 6px; font-size: 12.5px; color: var(--text-secondary); }
.ac-status { margin: 10px 0 0; font-size: 13.5px; color: var(--text-secondary); min-height: 20px; word-break: break-all; }
.ac-status.is-err { color: var(--danger); }
.ac-status.is-ok { color: #1a9e4b; }

/* 发送到邮箱面板 */
.ac-mail-panel { margin-top: 14px; padding: 14px; border: 1px solid var(--border-color); border-radius: 12px; background: var(--bg-secondary); }
.ac-mail-input { width: 100%; box-sizing: border-box; padding: 10px 12px; font-size: 14px; border: 1px solid var(--border-color); border-radius: 9px; background: var(--bg-primary); color: var(--text-primary); }
.ac-mail-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.ac-mail-row { display: flex; gap: 10px; margin-top: 10px; }
.ac-mail-note { margin: 10px 0 0; font-size: 12.5px; color: var(--text-secondary); line-height: 1.6; }
.ac-mail-panel .ac-status { margin: 8px 0 0; }

.ac-result audio { width: 100%; margin: 6px 0 12px; }
.ac-res-meta { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; }
.ac-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------- 说明区块 ---------- */
.ac-sect { margin-top: 30px; }
.ac-sect > h2 { font-size: 19px; font-weight: 800; color: var(--text-primary); margin: 0 0 14px; }
.ac-cards3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.ac-card3 { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; }
.ac-card3 h3 { margin: 0 0 8px; font-size: 14.5px; font-weight: 700; color: var(--text-primary); }
.ac-card3 p { margin: 0; font-size: 13px; line-height: 1.7; color: var(--text-secondary); }

.ac-steps .ac-step { display: flex; gap: 12px; margin-bottom: 14px; align-items: flex-start; }
.ac-step-n {
    flex: 0 0 auto; width: 26px; height: 26px; border-radius: 50%;
    background: var(--accent); color: #fff; font-size: 13px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.ac-step-b b { display: block; font-size: 14px; color: var(--text-primary); margin-bottom: 3px; }
.ac-step-b span { font-size: 13px; color: var(--text-secondary); line-height: 1.65; }

.ac-box { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; }
.ac-box p { margin: 0 0 8px; font-size: 13px; line-height: 1.75; color: var(--text-secondary); }
.ac-box p:last-child { margin-bottom: 0; }
.ac-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.ac-chip { font-size: 12px; padding: 3px 9px; border-radius: 6px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); }

.ac-faq details {
    border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px;
    margin-bottom: 10px; background: var(--bg-secondary);
}
.ac-faq summary { cursor: pointer; font-size: 14px; font-weight: 600; color: var(--text-primary); outline: none; }
.ac-faq details p { margin: 10px 0 0; font-size: 13px; line-height: 1.75; color: var(--text-secondary); }

.ac-foot-note {
    margin-top: 26px; font-size: 12.5px; line-height: 1.75; color: var(--text-secondary);
    border-top: 1px dashed var(--border); padding-top: 14px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 991px) {
    .ac-cards3 { grid-template-columns: 1fr; }
    .ac-grid3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 767px) {
    .ac-app { padding: 16px 14px 44px; }
    .ac-hero { padding: 16px 4px 14px; }
    .ac-hero h1 { font-size: 23px; }
    .ac-hero-sub { font-size: 14px; }
    .ac-drop { padding: 30px 14px; border-radius: 16px; }
    .ac-grid3 { grid-template-columns: 1fr; }
    .ac-fmt-grid { grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 8px; }
    .ac-file { flex-direction: column; align-items: flex-start; }
    .ac-select { font-size: 16px; } /* 防 iOS 聚焦缩放 */
    .ac-actions .ac-btn { flex: 1 1 auto; }
    .ac-url-wrap { max-width: none; }
    .ac-url-input { font-size: 16px; } /* 防 iOS 聚焦缩放 */
    .ac-url-row { flex-direction: column; }
    .ac-url-row .ac-btn { width: 100%; }
}
@media (max-width: 420px) {
    .ac-hero h1 { font-size: 20px; }
    .ac-fmt-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}