/* ============================================================
   水印工具前台样式
   ============================================================ */
:root {
    --primary: #2c71ff;
    --primary-hover: #1f5fe8;
    --primary-light: #eaf1ff;
    --bg: #f6f6f7;
    --card: #ffffff;
    --border: #e8eaef;
    --text: #2c2c2c;
    --text2: #9ba7b9;
    --text3: #9b9b9b;
    --green: #00a870;
    --orange: #e37318;
    --red: #d9455c;
    --radius: 3px;
    --shadow: 0 1px 3px rgba(0, 0, 0, .06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6;
    -webkit-overflow-scrolling: touch; touch-action: pan-y; overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; }

/* ---------------- 顶栏 ---------------- */
.topbar {
    background: #fff; border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
}
.topbar-in {
    max-width: 1080px; margin: 0 auto; padding: 0 16px; height: 58px;
    display: flex; align-items: center; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 9px; flex: none; }
.brand-logo {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 17px; font-weight: 700; flex: none;
}
.brand-name { font-size: 17px; font-weight: 700; color: var(--text); }
.top-right { margin-left: auto; display: flex; align-items: center; gap: 14px; flex: none; }
.login-link { color: var(--text2); font-size: 14px; }
.login-link:hover { color: var(--primary); }

/* ---------------- 布局 ---------------- */
.page.container { max-width: 1080px; margin: 0 auto; padding: 18px 16px 40px; }
.layout { display: flex; gap: 18px; align-items: flex-start; }
.main { flex: 1; min-width: 0; }

.card {
    background: var(--card); border-radius: var(--radius);
    box-shadow: var(--shadow); border: 0;
}

/* ---------------- 上传区域 ---------------- */
.upload-card { padding: 0; overflow: hidden; margin-bottom: 14px; }
.upload-zone {
    border: 2px dashed #c6ccd8; border-radius: 8px;
    padding: 48px 20px; text-align: center; cursor: pointer;
    transition: border-color .2s, background .2s; margin: 20px;
}
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--primary); background: var(--primary-light);
}
.upload-icon { font-size: 48px; margin-bottom: 12px; display: block; }
.upload-title { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.upload-hint { font-size: 13px; color: var(--text3); }

/* ---------------- 工作区 ---------------- */
.work-card { padding: 0; overflow: hidden; }
.work-layout { display: flex; gap: 0; }
.preview-wrap { flex: 1; min-width: 0; padding: 20px; border-right: 1px solid var(--border); }
.preview-img-wrap {
    text-align: center; min-height: 200px;
    display: flex; align-items: center; justify-content: center;
    background: repeating-conic-gradient(#f0f0f0 0% 25%, #fff 0% 50%) 50% / 16px 16px;
    border-radius: 6px; overflow: hidden;
}
.preview-img-wrap img {
    max-width: 100%; max-height: 520px; display: block; margin: 0 auto;
}
.preview-tip { font-size: 12px; color: var(--text3); margin-top: 8px; text-align: center; }

.controls-wrap { width: 280px; flex: none; padding: 20px; overflow-y: auto; max-height: 640px; }

.ctrl-section { margin-bottom: 18px; }
.ctrl-label { font-size: 13px; color: var(--text2); margin-bottom: 8px; font-weight: 600; display: flex; align-items: center; gap: 6px; }
.ctrl-label span { font-weight: 400; color: var(--text3); font-size: 12px; }

.ctrl-input {
    width: 100%; border: 1px solid #dfe3ea; border-radius: 8px;
    padding: 10px 12px; font-size: 14px; outline: none;
}
.ctrl-input:focus { border-color: var(--primary); }

/* 模式切换 */
.mode-tabs { display: flex; gap: 6px; }
.mode-btn {
    flex: 1; padding: 8px 0; border: 1px solid var(--border); border-radius: 8px;
    background: #fff; color: var(--text2); font-size: 13px; cursor: pointer;
    text-align: center; transition: all .15s;
}
.mode-btn:hover { border-color: var(--primary); color: var(--primary); }
.mode-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 位置按钮 */
.pos-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.pos-btn {
    padding: 8px 0; border: 1px solid var(--border); border-radius: 6px;
    background: #fff; color: var(--text2); font-size: 12px; cursor: pointer;
    text-align: center; transition: all .15s;
}
.pos-btn:hover { border-color: var(--primary); color: var(--primary); }
.pos-btn.active { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }

/* 滑块 */
.ctrl-range {
    width: 100%; height: 4px; -webkit-appearance: none; appearance: none;
    background: #e0e3eb; border-radius: 2px; outline: none;
}
.ctrl-range::-webkit-slider-thumb {
    -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
    background: var(--primary); cursor: pointer; border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,.2);
}

/* 颜色 */
.color-row { display: flex; align-items: center; gap: 8px; }
.ctrl-color {
    width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 8px;
    cursor: pointer; padding: 2px; background: #fff;
}
.color-text {
    flex: 1; font-family: monospace; font-size: 13px; text-transform: uppercase;
}

/* 按钮 */
.btn-primary {
    display: inline-block; background: var(--primary); color: #fff !important;
    border: 0; border-radius: 8px; padding: 11px 18px; font-size: 14px;
    font-weight: 600; cursor: pointer; text-align: center;
    -webkit-appearance: none; appearance: none; width: 100%;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:active { opacity: .85; }
.btn-ghost {
    display: inline-block; border: 1px solid var(--border); background: #fff;
    color: var(--text2); border-radius: 8px; padding: 11px 18px;
    font-size: 14px; cursor: pointer; text-align: center; width: 100%;
    -webkit-appearance: none; appearance: none;
}
.btn-ghost:hover { color: var(--primary); border-color: var(--primary); }
.btn-block { width: 100%; display: block; }

.ctrl-actions { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.ctrl-reset { text-align: center; margin-top: 12px; }
.ctrl-reset a { font-size: 13px; color: var(--text3); }
.ctrl-reset a:hover { color: var(--primary); }

/* ---------------- 底部 ---------------- */
.site-footer {
    border-top: 1px solid var(--border); background: #fff;
    padding: 22px 0 26px; text-align: center; font-size: 13px; color: var(--text3);
}
.site-footer .container { padding: 0 16px; }
.site-footer p { margin-bottom: 4px; }
.site-footer .copy { font-size: 12px; }

/* ---------------- 消息提示 ---------------- */
.msg-ok { background: #e6f7ef; color: var(--green); padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }
.form-err { background: #fdecee; color: var(--red); padding: 9px 13px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 860px) {
    .work-layout { flex-direction: column; }
    .preview-wrap { border-right: 0; border-bottom: 1px solid var(--border); }
    .controls-wrap { width: 100%; max-height: none; }
    .preview-img-wrap img { max-height: 360px; }
}

@media (max-width: 480px) {
    body { font-size: 13.5px; }
    .topbar-in { height: 50px; }
    .brand-name { display: none; }
    .upload-zone { padding: 32px 16px; }
    .upload-icon { font-size: 36px; }
}