/* ======================================================================
 *  slope-angle-converter.css —— 坡度角度换算（#8）
 *  主题：暖赭 + 米白纸（建筑施工图纸质感）
 *  布局语言：网格纸背景 + 三角剖面 SVG + 尺寸标注线（区别于 #6 环形 / #7 仪表盘）
 * ====================================================================== */

/* ---------- 作用域 ---------- */
.sac-page,
.sac-modal,
.sac-sheet,
.sac-toast {
    --sac-paper: #F6F1E8;
    --sac-paper-2: #EFE8DB;
    --sac-card: #FFFFFF;
    --sac-card-2: #FBF8F3;
    --sac-ochre: #B4552A;
    --sac-ochre-2: #D97845;
    --sac-ochre-soft: #FAEDE3;
    --sac-ink: #2C2723;
    --sac-ink-2: #574F48;
    --sac-ink-3: #8A8079;
    --sac-blue: #35617A;
    --sac-blue-soft: #E6EEF2;
    --sac-line: #DFD6C7;
    --sac-line-2: #EBE3D6;
    --sac-ok: #477A3E;
    --sac-ok-soft: #EAF2E7;
    --sac-warn: #A9710A;
    --sac-warn-soft: #FBF0DA;
    --sac-danger: #A83A2C;
    --sac-danger-soft: #F9E9E6;
    --sac-r-sm: 8px;
    --sac-r-md: 12px;
    --sac-r-lg: 16px;
    --sac-sh-1: 0 1px 2px rgba(44, 39, 35, .06);
    --sac-sh-2: 0 8px 22px rgba(44, 39, 35, .08);
    --sac-sh-3: 0 18px 44px rgba(44, 39, 35, .13);
    --sac-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --sac-grid: rgba(180, 85, 42, .09);
}

:root[data-theme="dark"] .sac-page,
:root[data-theme="dark"] .sac-modal,
:root[data-theme="dark"] .sac-sheet,
:root[data-theme="dark"] .sac-toast {
    --sac-paper: #16130F;
    --sac-paper-2: #1E1A15;
    --sac-card: #1C1915;
    --sac-card-2: #232019;
    --sac-ochre: #E0834E;
    --sac-ochre-2: #F0A277;
    --sac-ochre-soft: rgba(224, 131, 78, .15);
    --sac-ink: #F0E9DF;
    --sac-ink-2: #C4B9AB;
    --sac-ink-3: #948A7D;
    --sac-blue: #7FB0CB;
    --sac-blue-soft: rgba(127, 176, 203, .14);
    --sac-line: #38322A;
    --sac-line-2: #2B261F;
    --sac-ok: #86C77A;
    --sac-ok-soft: rgba(134, 199, 122, .14);
    --sac-warn: #E0B05A;
    --sac-warn-soft: rgba(224, 176, 90, .14);
    --sac-danger: #E58C7E;
    --sac-danger-soft: rgba(229, 140, 126, .14);
    --sac-sh-1: 0 1px 2px rgba(0, 0, 0, .4);
    --sac-sh-2: 0 8px 22px rgba(0, 0, 0, .46);
    --sac-sh-3: 0 18px 44px rgba(0, 0, 0, .55);
    --sac-grid: rgba(224, 131, 78, .12);
}

.sac-page {
    color: var(--sac-ink);
    font-size: 15.5px;
    line-height: 1.8;
}
.sac-page * { box-sizing: border-box; }

/* ================= 首屏 ================= */
.sac-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 30px;
    align-items: center;
    background:
        linear-gradient(var(--sac-grid) 1px, transparent 1px) 0 0 / 26px 26px,
        linear-gradient(90deg, var(--sac-grid) 1px, transparent 1px) 0 0 / 26px 26px,
        var(--sac-paper);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-lg);
    padding: 32px 36px;
    margin-bottom: 22px;
    box-shadow: var(--sac-sh-3);
    position: relative;
    overflow: hidden;
}
.sac-hero::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 4px;
    background: repeating-linear-gradient(90deg, var(--sac-ochre) 0 28px, transparent 28px 48px);
    opacity: .65;
}
.sac-hero-copy { position: relative; z-index: 1; min-width: 0; }
.sac-kicker {
    display: inline-block;
    padding: 5px 13px;
    border: 1px solid var(--sac-ochre);
    border-radius: 3px;
    color: var(--sac-ochre);
    background: var(--sac-ochre-soft);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .04em;
    margin-bottom: 13px;
}
.sac-hero h1 {
    font-size: clamp(25px, 3.2vw, 34px);
    font-weight: 800;
    line-height: 1.26;
    letter-spacing: -.02em;
    color: var(--sac-ink);
    margin: 0 0 11px;
}
.sac-hero-sub {
    font-size: 15px;
    line-height: 1.86;
    color: var(--sac-ink-2);
    margin: 0 0 16px;
    max-width: 56ch;
}
.sac-hero-sub b { color: var(--sac-ochre); font-weight: 700; }
.sac-chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.sac-chips li {
    padding: 4px 12px;
    border-radius: 3px;
    background: var(--sac-card);
    border: 1px solid var(--sac-line);
    color: var(--sac-ink-2);
    font-size: 12.5px;
    font-weight: 600;
}

/* 剖面图 */
.sac-profile-wrap { position: relative; z-index: 1; }
.sac-profile {
    width: 100%;
    max-width: 380px;
    height: auto;
    display: block;
    margin: 0 auto;
}
.sac-grid-line { stroke: var(--sac-grid); stroke-width: 1; }
.sac-axis { stroke: var(--sac-ink-3); stroke-width: 1.4; }
.sac-slope { stroke: var(--sac-ochre); stroke-width: 3; stroke-linecap: round; }
.sac-fill { fill: var(--sac-ochre-soft); }
.sac-dim { stroke: var(--sac-blue); stroke-width: 1; stroke-dasharray: 4 3; }
.sac-arc { fill: none; stroke: var(--sac-ochre); stroke-width: 1.6; }
.sac-dim-txt { fill: var(--sac-blue); font-size: 11px; font-family: var(--sac-mono); }
.sac-angle-txt { fill: var(--sac-ochre); font-size: 15px; font-weight: 800; font-family: var(--sac-mono); }
.sac-lbl { fill: var(--sac-ink-2); font-size: 11px; font-family: var(--sac-mono); }
.sac-profile-readout { text-align: center; margin-top: 8px; }
.sac-profile-readout b {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--sac-ochre);
    letter-spacing: -.02em;
    line-height: 1.15;
}
.sac-profile-readout span { font-size: 12px; color: var(--sac-ink-3); font-weight: 600; }
.sac-profile-readout span b {
    display: inline;
    font-size: 15px;
    color: var(--sac-ochre);
    font-weight: 800;
}
.sac-profile-note { font-size: 12.5px; color: var(--sac-ink-2); text-align: center; margin: 6px 0 0; }
.sac-profile-note b { color: var(--sac-ochre); }

/* ================= 首屏操作条 ================= */
.sac-quick {
    background: var(--sac-card);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-md);
    box-shadow: var(--sac-sh-2);
    padding: 17px 21px 15px;
    margin: -10px 0 22px;
    position: relative;
    z-index: 3;
}
.sac-mode-row { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.sac-mode {
    padding: 7px 16px;
    border: 1px solid var(--sac-line);
    border-radius: 3px;
    background: var(--sac-card-2);
    color: var(--sac-ink-2);
    font-size: 13.5px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all .16s;
}
.sac-mode:hover { border-color: var(--sac-ochre); color: var(--sac-ochre); }
.sac-mode.is-on {
    background: var(--sac-ochre);
    border-color: var(--sac-ochre);
    color: #fff;
}
.sac-quick-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
    gap: 16px;
    align-items: end;
}
.sac-field { min-width: 0; }
.sac-field > label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--sac-ink-2);
    margin-bottom: 6px;
}
.sac-field input[type="text"],
.sac-field input[type="number"],
.sac-field select {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    font-family: inherit;
    color: var(--sac-ink);
    background: var(--sac-card-2);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-sm);
    outline: none;
    transition: border-color .16s, box-shadow .16s, background-color .16s;
}
.sac-field input:focus, .sac-field select:focus {
    border-color: var(--sac-ochre);
    background: var(--sac-card);
    box-shadow: 0 0 0 3px var(--sac-ochre-soft);
}
.sac-field input.is-bad { border-color: var(--sac-danger); box-shadow: 0 0 0 3px var(--sac-danger-soft); }
.sac-hint { font-size: 12px; line-height: 1.6; color: var(--sac-ink-3); margin: 5px 0 0; }
.sac-hint b { color: var(--sac-ink-2); }
.sac-err { font-size: 12.5px; color: var(--sac-danger); margin: 9px 0 0; font-weight: 600; }
.sac-err:empty { display: none; }
.sac-quick-mini { display: flex; gap: 14px; justify-content: center; margin-top: 7px; }
.sac-linkbtn {
    background: none; border: none; padding: 0;
    font-family: inherit; font-size: 12.5px; font-weight: 650;
    color: var(--sac-ink-3); cursor: pointer;
    border-bottom: 1px dashed var(--sac-line);
    transition: color .16s, border-color .16s;
}
.sac-linkbtn:hover { color: var(--sac-ochre); border-color: var(--sac-ochre); }

/* ================= 按钮 ================= */
.sac-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.sac-btn {
    padding: 10px 18px;
    border-radius: var(--sac-r-sm);
    border: 1px solid var(--sac-line);
    background: var(--sac-card);
    color: var(--sac-ink-2);
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all .16s;
}
.sac-btn:hover { border-color: var(--sac-ochre); color: var(--sac-ochre); transform: translateY(-1px); }
.sac-btn--primary {
    background: var(--sac-ochre);
    border-color: var(--sac-ochre);
    color: #fff;
    box-shadow: 0 8px 18px rgba(180, 85, 42, .22);
}
.sac-btn--primary:hover { color: #fff; filter: brightness(1.06); }
.sac-btn--lg { padding: 12px 28px; font-size: 15px; }

/* ================= 主区 ================= */
.sac-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 384px);
    gap: 20px;
    align-items: start;
}
.sac-panel {
    background: var(--sac-card);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-md);
    box-shadow: var(--sac-sh-1);
    padding: 19px 21px 21px;
    margin-bottom: 18px;
}
.sac-panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 15px; }
.sac-step {
    flex-shrink: 0;
    display: grid; place-items: center;
    width: 27px; height: 27px;
    border: 1px solid var(--sac-ochre);
    border-radius: 3px;
    color: var(--sac-ochre);
    font-size: 12px;
    font-weight: 800;
    font-family: var(--sac-mono);
}
.sac-panel-head h2 {
    font-size: 17px; font-weight: 750; color: var(--sac-ink);
    margin: 0; letter-spacing: -.01em;
}

/* 换算卡 */
.sac-convert {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}
.sac-cell {
    padding: 13px 14px;
    border: 1px solid var(--sac-line-2);
    border-left: 3px solid var(--sac-line);
    border-radius: var(--sac-r-sm);
    background: var(--sac-card-2);
}
.sac-cell .ct { font-size: 12px; color: var(--sac-ink-3); font-weight: 650; display: block; margin-bottom: 3px; }
.sac-cell .cv { font-size: 21px; font-weight: 800; color: var(--sac-ink); letter-spacing: -.01em; line-height: 1.2; }
.sac-cell .cv small { font-size: 12.5px; font-weight: 650; color: var(--sac-ink-3); margin-left: 3px; }
.sac-cell.is-main { border-left-color: var(--sac-ochre); background: var(--sac-ochre-soft); }
.sac-cell.is-main .cv { color: var(--sac-ochre); }

/* 明细 */
.sac-rows { display: flex; flex-direction: column; }
.sac-row {
    display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
    padding: 10px 2px;
    border-bottom: 1px dashed var(--sac-line);
    font-size: 14px;
}
.sac-row:last-child { border-bottom: none; }
.sac-row .rk { color: var(--sac-ink-2); flex-shrink: 0; }
.sac-row .rv { color: var(--sac-ink); font-weight: 700; text-align: right; word-break: break-all; }
.sac-row .rv em { font-style: normal; color: var(--sac-ink-3); font-weight: 500; font-size: 12.5px; }

/* 提示 */
.sac-note {
    display: flex; gap: 11px;
    padding: 13px 15px;
    border-radius: var(--sac-r-sm);
    font-size: 13.5px; line-height: 1.75;
    margin-bottom: 11px;
    border: 1px solid transparent;
}
.sac-note:last-child { margin-bottom: 0; }
.sac-note .ico { flex-shrink: 0; font-size: 16px; line-height: 1.5; }
.sac-note--ok { background: var(--sac-ok-soft); border-color: color-mix(in srgb, var(--sac-ok) 26%, transparent); color: var(--sac-ink-2); }
.sac-note--ok b { color: var(--sac-ok); }
.sac-note--warn { background: var(--sac-warn-soft); border-color: color-mix(in srgb, var(--sac-warn) 26%, transparent); color: var(--sac-ink-2); }
.sac-note--warn b { color: var(--sac-warn); }
.sac-note--danger { background: var(--sac-danger-soft); border-color: color-mix(in srgb, var(--sac-danger) 26%, transparent); color: var(--sac-ink-2); }
.sac-note--danger b { color: var(--sac-danger); }

/* 规范对照表 */
.sac-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.sac-table th, .sac-table td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--sac-line-2); }
.sac-table th { font-size: 12px; font-weight: 700; color: var(--sac-ink-3); background: var(--sac-card-2); white-space: nowrap; }
.sac-table td { color: var(--sac-ink-2); }
.sac-table td:first-child { font-weight: 700; color: var(--sac-ink); white-space: nowrap; }
.sac-table tr.is-hit td { background: var(--sac-ochre-soft); color: var(--sac-ink); }
.sac-table tr.is-hit td:first-child { color: var(--sac-ochre); }
.sac-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* 批量 */
.sac-batch textarea {
    width: 100%; min-height: 112px;
    padding: 12px 13px;
    font-size: 14px; font-family: var(--sac-mono); line-height: 1.72;
    color: var(--sac-ink);
    background: var(--sac-card-2);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-sm);
    outline: none; resize: vertical;
}
.sac-batch textarea:focus { border-color: var(--sac-ochre); box-shadow: 0 0 0 3px var(--sac-ochre-soft); }
.sac-batch-out {
    margin-top: 12px; max-height: 320px; overflow: auto;
    border: 1px solid var(--sac-line); border-radius: var(--sac-r-sm);
}
.sac-batch-out table { width: 100%; border-collapse: collapse; font-size: 13px; }
.sac-batch-out th, .sac-batch-out td { padding: 7px 10px; border-bottom: 1px solid var(--sac-line-2); text-align: left; }
.sac-batch-out th { background: var(--sac-card-2); color: var(--sac-ink-3); font-size: 12px; font-weight: 700; position: sticky; top: 0; }
.sac-batch-out td { color: var(--sac-ink-2); }
.sac-batch-out td:first-child { font-weight: 700; color: var(--sac-ink); }

/* 全文 */
.sac-doc {
    font-family: var(--sac-mono); font-size: 13px; line-height: 1.85;
    white-space: pre-wrap; word-break: break-word;
    color: var(--sac-ink-2);
    background: var(--sac-card-2);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-sm);
    padding: 15px 16px;
    max-height: 440px; overflow: auto;
}
.sac-doc:empty::before { content: "输入坡度后点击「开始换算」"; color: var(--sac-ink-3); }

/* 风险卡 */
.sac-risk { margin-top: 28px; }
.sac-risk > h2 { font-size: 20px; font-weight: 800; margin: 0 0 15px; letter-spacing: -.01em; }
.sac-risk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 13px; }
.sac-risk-card {
    padding: 17px 18px;
    border: 1px solid var(--sac-line);
    border-top: 3px solid var(--sac-ochre);
    border-radius: var(--sac-r-sm);
    background: var(--sac-card);
    box-shadow: var(--sac-sh-1);
}
.sac-risk-card h3 { font-size: 15px; font-weight: 750; margin: 0 0 6px; color: var(--sac-ink); }
.sac-risk-card p { font-size: 13.5px; line-height: 1.78; color: var(--sac-ink-2); margin: 0; }
.sac-risk-card b { color: var(--sac-ink); }

/* toast */
.sac-toast {
    position: fixed; left: 50%; bottom: 26px;
    transform: translateX(-50%) translateY(10px);
    background: var(--sac-ink);
    color: var(--sac-paper);
    font-size: 14px; font-weight: 600;
    padding: 11px 22px; border-radius: 3px;
    z-index: 9999; opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s;
    box-shadow: var(--sac-sh-3);
}
.sac-toast.is-on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ================= 响应式 ================= */
@media (max-width: 980px) {
    .sac-hero { grid-template-columns: 1fr; padding: 26px 22px; }
    .sac-main { grid-template-columns: 1fr; }
    .sac-quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sac-quick-grid .sac-field--act { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
    .sac-hero { padding: 20px 16px; }
    .sac-hero h1 { font-size: 22px; }
    .sac-quick-grid { grid-template-columns: 1fr; }
    .sac-mode-row { gap: 6px; }
    .sac-mode { flex: 1; padding: 7px 10px; }
}

/* ================= AI 解读 ================= */
.sac-ai {
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-md);
    background: var(--sac-card);
    padding: 18px 20px 20px;
    box-shadow: var(--sac-sh-1);
    margin-bottom: 18px;
}
.sac-ai-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.sac-ai-head h2 { font-size: 16px; font-weight: 750; margin: 0; color: var(--sac-ink); }
.sac-ai-head .ai-tag {
    font-size: 11.5px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 3px;
    background: var(--sac-ochre-soft);
    color: var(--sac-ochre);
    border: 1px solid color-mix(in srgb, var(--sac-ochre) 30%, transparent);
}
.sac-ai-btn {
    padding: 9px 18px;
    border-radius: var(--sac-r-sm);
    border: 1px solid var(--sac-ochre);
    background: var(--sac-ochre-soft);
    color: var(--sac-ochre);
    font-size: 13.5px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all .16s;
}
.sac-ai-btn:hover { background: var(--sac-ochre); color: #fff; }
.sac-ai-btn:disabled { opacity: .55; cursor: not-allowed; }
.sac-ai-status { font-size: 12.5px; color: var(--sac-ink-3); }
.sac-ai-box {
    margin-top: 12px;
    font-size: 14px;
    line-height: 1.82;
    color: var(--sac-ink-2);
    background: var(--sac-card-2);
    border: 1px solid var(--sac-line);
    border-radius: var(--sac-r-sm);
    padding: 14px 16px;
}
.sac-ai-box:empty { display: none; }
.sac-ai-box p { margin: 0 0 8px; }
.sac-ai-box p:last-child { margin-bottom: 0; }
.sac-ai-note { font-size: 12px; color: var(--sac-ink-3); margin: 10px 0 0; }

/* ================= 打印 ================= */
@media print {
    .sac-actions, .sac-batch, .sac-toast, .sac-quick, .sac-ai { display: none !important; }
    .sac-hero { background: none; box-shadow: none; border: 1px solid #999; }
    .sac-panel, .sac-risk-card { box-shadow: none; break-inside: avoid; }
}