/* ==========================================================
   PDF 签名 /tools/pdf_signer
   复刻 tools.ai225.com/tools/pdf-signer 的卡片式设计，
   左设置 + 右预览双栏，三端响应式，跟随站点深浅色主题。
   ========================================================== */

/* 整屏工具页：解除中心限宽并铺满（保留左侧导航） */
body.page-pdf-signer-full .app { max-width: 100%; }
body.page-pdf-signer-full .main-content { max-width: 100%; width: 100%; border-right: 0; }

.sg { padding: 16px 18px 34px; box-sizing: border-box; }

/* [hidden] 兜底：本文件多处用 display:flex/grid，必须强制隐藏 */
.sg [hidden] { display: none !important; }

/* ---------- Hero ---------- */
.sg-hero { display: flex; align-items: center; gap: 13px; margin-bottom: 14px; }
.sg-hero-ico {
    width: 52px; height: 52px; flex: 0 0 auto; border-radius: 15px; font-size: 26px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent, #136ce9) 16%, transparent), color-mix(in srgb, var(--accent, #136ce9) 5%, transparent));
    border: 1px solid color-mix(in srgb, var(--accent, #136ce9) 22%, transparent);
}
.sg-hero-txt { min-width: 0; }
.sg-title { margin: 0; font-size: 22px; font-weight: 800; letter-spacing: .2px; color: var(--text-primary, #111827); }
.sg-sub { margin: 4px 0 0; font-size: 13px; line-height: 1.7; color: var(--text-secondary, #6b7280); max-width: 940px; }

/* ---------- 提示条 ---------- */
.sg-note {
    margin: 0 0 12px; padding: 10px 13px; border-radius: 11px; font-size: 13.5px; line-height: 1.6;
    background: var(--bg-secondary, #f3f4f6); color: var(--text-primary, #111827);
    border: 1px solid var(--border-color, #e5e7eb);
}
.sg-note.is-err { background: color-mix(in srgb, #dc2626 10%, transparent); border-color: color-mix(in srgb, #dc2626 32%, transparent); color: #b91c1c; }
.sg-note.is-ok { background: color-mix(in srgb, #16a34a 10%, transparent); border-color: color-mix(in srgb, #16a34a 32%, transparent); color: #15803d; }
.sg-note.is-warn { background: color-mix(in srgb, #d97706 12%, transparent); border-color: color-mix(in srgb, #d97706 34%, transparent); color: #b45309; }

/* ---------- 布局 ---------- */
.sg-app { display: grid; grid-template-columns: 372px minmax(0, 1fr); gap: 16px; align-items: start; }
.sg-side { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.sg-main { min-width: 0; display: flex; flex-direction: column; gap: 10px; }

.sg-card {
    background: var(--bg-primary, #fff); border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 14px; padding: 13px 14px;
}
.sg-card-title { font-size: 13.5px; font-weight: 800; color: var(--text-primary, #111827); margin-bottom: 10px; }

/* ---------- 上传区 ---------- */
.sg-drop {
    border: 2px dashed var(--border-color, #e5e7eb); border-radius: 14px; padding: 20px 14px;
    text-align: center; cursor: pointer; background: var(--bg-secondary, #f9fafb);
    display: flex; flex-direction: column; align-items: center; gap: 6px; transition: border-color .15s, background .15s;
}
.sg-drop:hover, .sg-drop.is-over { border-color: var(--accent, #136ce9); background: color-mix(in srgb, var(--accent, #136ce9) 6%, var(--bg-secondary, #f9fafb)); }
.sg-drop-sm { padding: 14px 12px; }
.sg-drop-ico { font-size: 30px; line-height: 1; opacity: .8; }
.sg-drop-sm .sg-drop-ico { font-size: 24px; }
.sg-drop-t { margin: 0; font-size: 14px; font-weight: 700; color: var(--text-primary, #111827); }
.sg-drop-s { margin: 0; font-size: 12px; color: var(--text-secondary, #6b7280); line-height: 1.6; }

/* ---------- 文件卡 / 签名卡 ---------- */
.sg-file-head, .sg-sig-head {
    display: flex; align-items: center; gap: 10px; padding: 10px 11px;
    border: 1px solid var(--border-color, #e5e7eb); border-radius: 11px;
    background: var(--bg-secondary, #f9fafb);
}
.sg-file-ico { font-size: 22px; flex: 0 0 auto; }
.sg-file-info, .sg-sig-info { min-width: 0; flex: 1 1 auto; }
.sg-file-name, .sg-sig-name {
    font-size: 13.5px; font-weight: 700; color: var(--text-primary, #111827);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.sg-file-meta, .sg-sig-meta { font-size: 12px; color: var(--text-secondary, #6b7280); margin-top: 2px; }
.sg-sig-thumb {
    width: 82px; height: 46px; flex: 0 0 auto; object-fit: contain; border-radius: 7px;
    background: #fff; border: 1px solid var(--border-color, #e5e7eb); padding: 2px; box-sizing: border-box;
}
.sg-icon-btn {
    flex: 0 0 auto; width: 32px; height: 32px; border-radius: 9px; cursor: pointer; font-size: 14px;
    border: 1px solid var(--border-color, #e5e7eb); background: var(--bg-primary, #fff); color: var(--text-secondary, #6b7280);
}
.sg-icon-btn:hover { color: #dc2626; border-color: color-mix(in srgb, #dc2626 40%, transparent); }

/* ---------- 按钮 ---------- */
.sg-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 5px;
    padding: 8px 13px; border-radius: 10px; font-size: 13px; font-weight: 600; cursor: pointer;
    border: 1px solid var(--border-color, #e5e7eb); background: var(--bg-primary, #fff); color: var(--text-primary, #111827);
    transition: background .15s, border-color .15s, opacity .15s;
}
.sg-btn:hover { background: var(--bg-secondary, #f3f4f6); }
.sg-btn:disabled { opacity: .5; cursor: not-allowed; }
.sg-btn-go { background: var(--accent, #136ce9); border-color: var(--accent, #136ce9); color: #fff; }
.sg-btn-go:hover { background: color-mix(in srgb, var(--accent, #136ce9) 86%, #000); border-color: color-mix(in srgb, var(--accent, #136ce9) 86%, #000); }
.sg-btn-line { display: flex; margin-top: 9px; }
.sg-btn-xs { padding: 6px 10px; font-size: 12.5px; border-radius: 9px; }
.sg-btn-block { width: 100%; margin-top: 4px; padding: 11px; font-size: 14px; }
.sg-btn-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 9px; }

/* ---------- 表单 ---------- */
.sg-field { margin-bottom: 11px; }
.sg-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sg-label { display: block; font-size: 12.5px; font-weight: 700; color: var(--text-secondary, #6b7280); margin-bottom: 5px; }
.sg-input, .sg-select {
    width: 100%; box-sizing: border-box; padding: 8px 10px; font-size: 13.5px; border-radius: 10px;
    border: 1px solid var(--border-color, #e5e7eb); background: var(--bg-primary, #fff); color: var(--text-primary, #111827);
}
.sg-input:focus, .sg-select:focus { outline: none; border-color: var(--accent, #136ce9); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent, #136ce9) 16%, transparent); }
.sg-input:disabled { opacity: .55; cursor: not-allowed; }
.sg-row { display: flex; align-items: center; gap: 9px; }
.sg-row input[type="range"] { flex: 1 1 auto; min-width: 0; accent-color: var(--accent, #136ce9); }
.sg-num { width: 62px; flex: 0 0 auto; text-align: center; box-sizing: border-box; padding: 7px 6px; font-size: 13px; border-radius: 9px; border: 1px solid var(--border-color, #e5e7eb); background: var(--bg-primary, #fff); color: var(--text-primary, #111827); }
.sg-unit { font-size: 12px; color: var(--text-secondary, #6b7280); flex: 0 0 auto; width: 18px; }
.sg-out-row { display: flex; align-items: center; gap: 7px; }
.sg-suffix { font-size: 13px; color: var(--text-secondary, #6b7280); flex: 0 0 auto; }

/* ---------- 画板 / 文字签名 ---------- */
.sg-pad { margin-top: 10px; padding: 11px; border: 1px dashed var(--border-color, #e5e7eb); border-radius: 12px; background: var(--bg-secondary, #f9fafb); }
.sg-pad-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 9px; }
.sg-pad-lab { font-size: 12px; font-weight: 700; color: var(--text-secondary, #6b7280); }
.sg-pad-tools input[type="color"] { width: 38px; height: 30px; padding: 0; border: 1px solid var(--border-color, #e5e7eb); border-radius: 8px; background: none; cursor: pointer; }
.sg-pad-tools input[type="range"] { width: 96px; accent-color: var(--accent, #136ce9); }
.sg-pad-canvas {
    display: block; width: 100%; height: 170px; border-radius: 10px; cursor: crosshair; touch-action: none;
    background: #fff; border: 1px solid var(--border-color, #e5e7eb);
}
.sg-pad .sg-field { margin-bottom: 9px; }

/* ---------- 预览 ---------- */
.sg-bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.sg-bar-left, .sg-bar-right { display: flex; align-items: center; gap: 8px; min-width: 0; }
.sg-bar-title { margin: 0; font-size: 14.5px; font-weight: 800; color: var(--text-primary, #111827); }
.sg-bar-count { font-size: 12.5px; color: var(--text-secondary, #6b7280); }

.sg-stage {
    position: relative; min-height: 420px; border-radius: 13px; padding: 14px; box-sizing: border-box;
    border: 1px solid var(--border-color, #e5e7eb); background: var(--bg-secondary, #f3f4f6);
    display: flex; align-items: flex-start; justify-content: center; overflow: auto;
}
.sg-prev-wrap { position: relative; flex: 0 0 auto; box-shadow: 0 8px 26px rgba(15, 23, 42, .14); border-radius: 3px; line-height: 0; }
.sg-prev-wrap canvas { display: block; max-width: none; border-radius: 3px; }
.sg-prev-sig {
    position: absolute; left: 0; top: 0; cursor: grab; touch-action: none;
    border: 1px dashed transparent; border-radius: 3px; user-select: none; -webkit-user-drag: none;
}
.sg-prev-sig:hover { border-color: color-mix(in srgb, var(--accent, #136ce9) 55%, transparent); }
.sg-prev-sig.is-drag { cursor: grabbing; border-color: var(--accent, #136ce9); }

/* 预览右上角的「放大查看」按钮：不干扰签名拖动，整块可点击打开灯箱 */
.sg-prev-zoom {
    position: absolute; right: 8px; top: 8px; z-index: 4; width: 34px; height: 34px; padding: 0;
    display: flex; align-items: center; justify-content: center; font-size: 16px; cursor: pointer;
    color: #fff; background: color-mix(in srgb, #0f172a 62%, transparent); border: none; border-radius: 9px;
    backdrop-filter: blur(2px);
}
.sg-prev-zoom:hover { background: var(--accent, #136ce9); }

/* ---------- 预览放大 / 全屏 灯箱 ---------- */
.sg-zoom {
    position: fixed; inset: 0; z-index: 999; display: flex; align-items: center; justify-content: center;
}
.sg-zoom[hidden] { display: none !important; }
.sg-zoom-mask { position: absolute; inset: 0; background: rgba(8, 12, 22, .82); }
.sg-zoom-box {
    position: relative; z-index: 1; display: flex; flex-direction: column; width: min(94vw, 1100px);
    height: min(92vh, 880px); background: var(--bg-primary, #fff); border-radius: 16px; overflow: hidden;
    box-shadow: 0 30px 90px rgba(0, 0, 0, .5);
}
.sg-zoom-bar {
    display: flex; align-items: center; gap: 10px; padding: 10px 14px; flex: 0 0 auto;
    border-bottom: 1px solid var(--border-color, #e5e7eb); background: var(--bg-primary, #fff);
}
.sg-zoom-title { font-size: 14px; font-weight: 700; }
.sg-zoom-val {
    font-size: 12.5px; color: var(--text-secondary, #6b7280); font-variant-numeric: tabular-nums;
    min-width: 44px;
}
.sg-zoom-btns { margin-left: auto; display: flex; gap: 6px; }
.sg-zoom-btn {
    min-width: 32px; height: 32px; padding: 0 8px; cursor: pointer; font-size: 15px; line-height: 1;
    color: var(--text-primary, #111827); background: var(--bg-secondary, #f3f4f6);
    border: 1px solid var(--border-color, #e5e7eb); border-radius: 8px;
}
.sg-zoom-btn:hover { border-color: var(--accent, #136ce9); color: var(--accent, #136ce9); }
.sg-zoom-stage {
    flex: 1 1 auto; min-height: 0; position: relative; overflow: auto; padding: 16px;
    display: flex; align-items: center; justify-content: center;
    background: repeating-conic-gradient(color-mix(in srgb, var(--bg-secondary, #f3f4f6) 0% 25%, transparent 0% 50%) 0 / 22px 22px);
    cursor: grab;
}
.sg-zoom-stage.is-pan { cursor: grabbing; }
.sg-zoom-stage canvas {
    display: block; max-width: none; border-radius: 4px;
    box-shadow: 0 10px 34px rgba(0, 0, 0, .35); background: #fff;
    transform-origin: top left;
}
.sg-zoom-hint {
    margin: 0; flex: 0 0 auto; padding: 8px 14px; font-size: 12px; line-height: 1.5;
    color: var(--text-secondary, #6b7280); border-top: 1px solid var(--border-color, #e5e7eb);
    background: var(--bg-primary, #fff);
}
/* 灯箱打开时锁住页面滚动 */
body.sg-zoom-open { overflow: hidden; }
.sg-empty {
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
    min-height: 380px; color: var(--text-secondary, #6b7280); width: 100%;
}
.sg-empty-ico { font-size: 40px; opacity: .5; }
.sg-empty p { margin: 0; font-size: 14px; }
.sg-tip { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--text-secondary, #6b7280); }

/* ---------- 说明 ---------- */
.sg-about {
    margin-top: 20px; padding: 16px 18px; border-radius: 14px; font-size: 13.5px; line-height: 1.8;
    background: var(--bg-primary, #fff); border: 1px solid var(--border-color, #e5e7eb); color: var(--text-primary, #111827);
}
.sg-about-title { margin: 0 0 8px; font-size: 15px; font-weight: 800; }
.sg-about h3 { margin: 16px 0 8px; font-size: 14px; font-weight: 800; }
.sg-about-list { margin: 0; padding-left: 20px; }
.sg-about-list li { margin-bottom: 4px; }
.sg-about table { width: 100%; border-collapse: collapse; margin-top: 6px; font-size: 13px; }
.sg-about th, .sg-about td { border: 1px solid var(--border-color, #e5e7eb); padding: 7px 9px; text-align: left; vertical-align: top; }
.sg-about th { background: var(--bg-secondary, #f9fafb); font-weight: 700; width: 120px; }
.sg-hint { margin: 12px 0 0; font-size: 12.5px; color: var(--text-secondary, #6b7280); }

/* ---------- 响应式：平板 / 窄窗 ---------- */
@media (max-width: 1099px) {
    .sg-app { grid-template-columns: 330px minmax(0, 1fr); }
}
@media (max-width: 991px) {
    .sg-app { grid-template-columns: minmax(0, 1fr); }
    .sg-main { order: -1; }
    .sg-stage { min-height: 340px; }
}
/* ---------- 响应式：手机 ---------- */
@media (max-width: 767px) {
    .sg { padding: 12px 12px 26px; }
    .sg-hero { gap: 10px; }
    .sg-hero-ico { width: 44px; height: 44px; border-radius: 13px; font-size: 22px; }
    .sg-title { font-size: 19px; }
    .sg-sub { font-size: 12.5px; }
    .sg-grid2 { grid-template-columns: 1fr; }
    /* 16px 防 iOS 聚焦缩放 */
    .sg-input, .sg-select, .sg-num { font-size: 16px; }
    .sg-stage { min-height: 300px; padding: 10px; }
    .sg-btn-block { padding: 13px; }
    .sg-about { padding: 13px 13px; font-size: 13px; }
    .sg-about th { width: 92px; }
    .sg-pad-canvas { height: 150px; }
}
@media (max-width: 420px) {
    .sg-drop { padding: 16px 10px; }
    .sg-btn-row .sg-btn { flex: 1 1 auto; }
}