/* ============================================================
   #23 UTC 时间换算 · 时区罗盘 / 航空时刻表
   前缀 utc- · 暖米纸 + 深松绿 + 铜金，浅色默认深色整套覆盖
   ============================================================ */
.utc-page, .utc-toast {
    --utc-bg: #fbf7ec;
    --utc-bg2: #f3ecdb;
    --utc-panel: #fffdf6;
    --utc-panel2: #faf5e8;
    --utc-ink: #25332d;
    --utc-sub: #6d766b;
    --utc-line: #e5dcc5;
    --utc-line2: #d4c6a4;
    --utc-brand: #175c50;
    --utc-brand-deep: #0e4038;
    --utc-brand-soft: #e3f0e9;
    --utc-copper: #a9601c;
    --utc-copper-soft: #f8ead4;
    --utc-warn: #a5431c;
    --utc-code: #f2ecdc;
    --utc-shadow: 0 14px 34px rgba(81, 71, 42, .10);
    --utc-shadow-sm: 0 3px 12px rgba(81, 71, 42, .07);
    --utc-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
:root[data-theme="dark"] .utc-page, :root[data-theme="dark"] .utc-toast {
    --utc-bg: #111a17;
    --utc-bg2: #18231e;
    --utc-panel: #18251f;
    --utc-panel2: #1e2f27;
    --utc-ink: #eaf3e9;
    --utc-sub: #a1b3a5;
    --utc-line: #2d4238;
    --utc-line2: #3e5948;
    --utc-brand: #6dd1a8;
    --utc-brand-deep: #9ce6c5;
    --utc-brand-soft: #17392e;
    --utc-copper: #f0b366;
    --utc-copper-soft: #3a2c19;
    --utc-warn: #ff9d78;
    --utc-code: #14241d;
    --utc-shadow: 0 14px 34px rgba(0, 0, 0, .34);
    --utc-shadow-sm: 0 3px 12px rgba(0, 0, 0, .26);
}
.utc-page {
    background: var(--utc-bg); color: var(--utc-ink); padding: 0 0 56px; min-height: 60vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 15px; line-height: 1.75;
}
.utc-wrap { max-width: 1140px; margin: 0 auto; padding: 18px 16px 0; }
.utc-page .detail-breadcrumb { font-size: 13px; color: var(--utc-sub); margin: 10px 0 18px; }
.utc-page .detail-breadcrumb a { color: var(--utc-sub); text-decoration: none; }
.utc-page .detail-breadcrumb a:hover { color: var(--utc-brand); }
.utc-page .detail-breadcrumb .current { color: var(--utc-brand); font-weight: 700; }
.utc-page .detail-breadcrumb .sep { margin: 0 8px; opacity: .6; }

/* ---------- 首屏 ---------- */
.utc-hero { display: grid; grid-template-columns: 1.18fr .82fr; gap: 26px; align-items: stretch; margin-bottom: 24px; }
.utc-hero > * { min-width: 0; }
.utc-kicker {
    display: inline-block; font: 700 11px var(--utc-mono); letter-spacing: 1.3px;
    color: var(--utc-copper); background: var(--utc-copper-soft);
    border: 1px solid var(--utc-line2); border-radius: 3px; padding: 6px 12px; margin-bottom: 14px;
}
.utc-page h1 { font-size: 35px; line-height: 1.22; font-weight: 800; margin: 0 0 14px; }
.utc-sub { font-size: 15px; line-height: 1.95; color: var(--utc-sub); margin: 0 0 18px; max-width: 640px; }
.utc-sub b { color: var(--utc-ink); }
.utc-form { background: var(--utc-panel); border: 1px solid var(--utc-line2); border-radius: 12px; padding: 14px 16px; box-shadow: var(--utc-shadow-sm); }
.utc-form > label { display: block; font-size: 12px; font-weight: 700; margin-bottom: 7px; }
.utc-form-row { display: flex; gap: 8px; flex-wrap: wrap; }
.utc-form-row input {
    flex: 1 1 260px; min-width: 0; padding: 10px 12px; border: 1px solid var(--utc-line2);
    border-radius: 7px; background: var(--utc-panel2); color: var(--utc-ink); font: 13px var(--utc-mono);
}
.utc-form-row select, .utc-custom input {
    padding: 10px; border: 1px solid var(--utc-line2); border-radius: 7px;
    background: var(--utc-panel2); color: var(--utc-ink); font-size: 13px; font-family: inherit;
}
.utc-btn {
    border: 1px solid var(--utc-line2); background: var(--utc-panel2); color: var(--utc-ink);
    border-radius: 7px; padding: 10px 16px; font-size: 14px; font-weight: 650; cursor: pointer;
    transition: transform .12s, box-shadow .12s, background .12s; font-family: inherit;
}
.utc-btn:hover { transform: translateY(-1px); box-shadow: var(--utc-shadow-sm); }
.utc-btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.utc-btn-main { background: var(--utc-brand); border-color: var(--utc-brand-deep); color: #fff; }
.utc-btn-main:hover { background: var(--utc-brand-deep); }
.utc-btn-ghost { background: transparent; }
.utc-mini {
    border: 1px solid var(--utc-line2); background: var(--utc-panel2); color: var(--utc-brand);
    border-radius: 6px; padding: 5px 11px; font-size: 12px; cursor: pointer; font-family: inherit;
}
.utc-form-acts { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 10px; }
.utc-form-msg, .utc-batch-msg, .utc-custom-msg { font-size: 11.5px; color: var(--utc-sub); margin: 9px 0 0; line-height: 1.8; min-height: 20px; }
.utc-form-msg.is-err, .utc-batch-msg.is-err, .utc-custom-msg.is-err { color: var(--utc-warn); }

/* ---------- 罗盘 ---------- */
.utc-compass {
    background: radial-gradient(circle at 50% 38%, var(--utc-panel), var(--utc-panel2));
    border: 1px solid var(--utc-line2); border-radius: 12px; box-shadow: var(--utc-shadow);
    padding: 14px 16px; text-align: center; display: flex; flex-direction: column; align-items: center;
}
.utc-compass-head { width: 100%; display: flex; justify-content: space-between; gap: 8px; font: 700 11px var(--utc-mono); letter-spacing: 1px; color: var(--utc-sub); }
.utc-compass-head b { color: var(--utc-copper); }
.utc-compass svg { width: 236px; max-width: 100%; height: 236px; margin: 6px 0 0; }
.utc-c-outer { fill: none; stroke: var(--utc-line2); stroke-width: 2; }
.utc-c-inner { fill: none; stroke: var(--utc-line); stroke-width: 1; stroke-dasharray: 4 5; }
.utc-ticks line { stroke: var(--utc-brand); stroke-width: 2; }
.utc-c-label { font: 700 11px var(--utc-mono); fill: var(--utc-sub); }
.utc-needle line { stroke: var(--utc-copper); stroke-width: 3; }
.utc-needle circle { fill: var(--utc-copper); }
.utc-c-hub { fill: var(--utc-brand); }
.utc-c-center { font: 800 20px var(--utc-mono); fill: var(--utc-brand); }
.utc-c-sub { font: 10px var(--utc-mono); fill: var(--utc-sub); }
.utc-compass-foot { font-size: 11.5px; color: var(--utc-sub); margin: 4px 0 0; line-height: 1.7; }

/* ---------- 区块 ---------- */
.utc-section {
    background: var(--utc-panel); border: 1px solid var(--utc-line); border-radius: 12px;
    box-shadow: var(--utc-shadow-sm); padding: 20px; margin-bottom: 20px;
}
.utc-sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 15px; }
.utc-page h2 { font-size: 19px; margin: 0; font-weight: 800; }
.utc-page h2::before { content: '◷'; color: var(--utc-copper); margin-right: 8px; }
.utc-sec-sub { font: 11.5px var(--utc-mono); color: var(--utc-sub); }
.utc-results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.utc-result { border: 1px solid var(--utc-line2); border-top: 4px solid var(--utc-brand); border-radius: 9px; background: var(--utc-panel2); padding: 13px 15px; min-width: 0; }
.utc-result.is-copper { border-top-color: var(--utc-copper); background: var(--utc-copper-soft); }
.utc-result span { display: block; font-size: 11.5px; color: var(--utc-sub); }
.utc-result b { display: block; font: 800 19px/1.5 var(--utc-mono); color: var(--utc-ink); word-break: break-word; }
.utc-result small { display: block; font: 11.5px var(--utc-mono); color: var(--utc-brand); }
.utc-epoch { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 13px; padding: 10px 13px; background: var(--utc-code); border-radius: 8px; font-size: 12.5px; }
.utc-epoch span { color: var(--utc-sub); }
.utc-epoch b { font: 700 14px var(--utc-mono); color: var(--utc-ink); }
.utc-table-scroll { overflow-x: auto; }
.utc-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.utc-table th, .utc-table td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--utc-line); vertical-align: top; }
.utc-table th { background: var(--utc-bg2); color: var(--utc-sub); font-size: 11.5px; white-space: nowrap; }
.utc-table tbody tr:nth-child(even) { background: var(--utc-panel2); }
.utc-table td { font-family: var(--utc-mono); word-break: break-word; }
.utc-table .utc-empty { text-align: center; color: var(--utc-sub); padding: 24px; font-family: inherit; }
.utc-offset { display: inline-block; border-radius: 4px; padding: 2px 7px; background: var(--utc-brand-soft); color: var(--utc-brand); font-weight: 700; }
.utc-pill { display: inline-block; border-radius: 4px; padding: 2px 7px; font-size: 11px; font-weight: 700; background: var(--utc-brand-soft); color: var(--utc-brand); }
.utc-pill.err { background: var(--utc-copper-soft); color: var(--utc-warn); }
.utc-custom { margin-top: 15px; padding-top: 14px; border-top: 1px dashed var(--utc-line2); }
.utc-custom label { display: block; font-size: 12px; font-weight: 700; margin-bottom: 7px; }
.utc-custom > div { display: flex; gap: 8px; flex-wrap: wrap; }
.utc-custom input { flex: 1 1 220px; min-width: 0; font-family: var(--utc-mono); }
.utc-batch { display: grid; grid-template-columns: .85fr 1.15fr; gap: 18px; }
.utc-batch > * { min-width: 0; }
.utc-batch label { display: block; font-size: 12.5px; font-weight: 700; margin-bottom: 7px; }
.utc-batch textarea {
    width: 100%; box-sizing: border-box; resize: vertical; padding: 11px 12px;
    border: 1px solid var(--utc-line2); border-radius: 8px; background: var(--utc-panel2);
    color: var(--utc-ink); font: 12px/1.8 var(--utc-mono);
}
.utc-batch-acts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.utc-note-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 11px; }
.utc-note-grid > div { border: 1px solid var(--utc-line); border-radius: 9px; background: var(--utc-panel2); padding: 12px 14px; min-width: 0; }
.utc-note-grid b { display: block; color: var(--utc-brand); font-size: 13.5px; margin-bottom: 5px; }
.utc-note-grid p { margin: 0; font-size: 12.5px; line-height: 1.9; color: var(--utc-sub); }
.utc-note-grid p b { display: inline; font-size: inherit; color: var(--utc-ink); }
.utc-toast {
    position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 14px);
    background: var(--utc-ink); color: var(--utc-panel); border-radius: 8px; padding: 10px 18px;
    font-size: 13px; box-shadow: var(--utc-shadow); opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s; z-index: 999;
}
.utc-toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 980px) {
    .utc-hero, .utc-batch { grid-template-columns: 1fr; }
    .utc-results, .utc-note-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .utc-wrap { padding: 12px 12px 0; }
    .utc-page h1 { font-size: 28px; }
    .utc-sub { font-size: 14px; line-height: 1.85; }
    .utc-section { padding: 15px 13px; }
    .utc-form { padding: 12px; }
    .utc-table th, .utc-table td { padding: 8px 7px; font-size: 11.5px; }
    .utc-result b { font-size: 17px; }
    .utc-compass svg { width: 210px; height: 210px; }
}

/* 深色主按钮：亮松绿底配深墨字 */
:root[data-theme="dark"] .utc-btn-main { color: #0b241c; }
:root[data-theme="dark"] .utc-btn-main:hover { color: #0b241c; }