/* ============================================================
   国际空间站过境预测 · 天文台日志 / 极坐标星图
   前缀 iss- · 淡蓝灰 + 深靛 + 星青 + 极光紫，浅色默认；深色整套覆盖
   ============================================================ */
.iss-page, .iss-modal, .iss-toast {
    --iss-bg: #eef3f9;
    --iss-bg2: #dfe9f5;
    --iss-panel: #ffffff;
    --iss-panel2: #f3f7fc;
    --iss-ink: #17294d;
    --iss-sub: #62748f;
    --iss-line: #d9e3f0;
    --iss-line2: #b9cbe3;
    --iss-navy: #16294d;
    --iss-blue: #2f6fc4;
    --iss-blue-deep: #1a4b93;
    --iss-violet: #7255c7;
    --iss-mint: #1f8a7b;
    --iss-amber: #c88a16;
    --iss-red: #c04a3e;
    --iss-shadow: 0 18px 42px rgba(20, 45, 84, .13);
    --iss-shadow-sm: 0 3px 12px rgba(20, 45, 84, .08);
    --iss-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
:root[data-theme="dark"] .iss-page, :root[data-theme="dark"] .iss-modal, :root[data-theme="dark"] .iss-toast {
    --iss-bg: #0b111e;
    --iss-bg2: #131f34;
    --iss-panel: #111a2a;
    --iss-panel2: #18263b;
    --iss-ink: #e2ebfa;
    --iss-sub: #9db0cd;
    --iss-line: #263752;
    --iss-line2: #3a5378;
    --iss-navy: #070d18;
    --iss-blue: #7fb1ff;
    --iss-blue-deep: #a9cdff;
    --iss-violet: #b79bff;
    --iss-mint: #5ed4bd;
    --iss-amber: #eac273;
    --iss-red: #ff8f80;
    --iss-shadow: 0 18px 42px rgba(0, 0, 0, .52);
    --iss-shadow-sm: 0 3px 12px rgba(0, 0, 0, .34);
}
.iss-page {
    background: radial-gradient(1100px 460px at 12% -10%, var(--iss-bg2), transparent 62%), var(--iss-bg);
    color: var(--iss-ink); padding: 0 0 58px; min-height: 60vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 15px; line-height: 1.8;
}
.iss-wrap { max-width: 1180px; margin: 0 auto; padding: 18px 16px 0; }
.iss-page .detail-breadcrumb { font-size: 13px; color: var(--iss-sub); margin: 10px 0 16px; }
.iss-page .detail-breadcrumb a { color: var(--iss-sub); text-decoration: none; }
.iss-page .detail-breadcrumb a:hover { color: var(--iss-blue); }
.iss-page .detail-breadcrumb .current { color: var(--iss-blue); font-weight: 700; }
.iss-page .detail-breadcrumb .sep { margin: 0 8px; opacity: .55; }
.iss-notice { display: flex; align-items: flex-start; gap: 12px; flex-wrap: wrap; background: var(--iss-panel); border: 1px solid var(--iss-line2); border-left: 4px solid var(--iss-amber); border-radius: 6px; padding: 9px 13px; margin-bottom: 18px; font-size: 12px; }
.iss-notice > b { flex: none; font: 800 10.5px var(--iss-mono); letter-spacing: 1px; color: var(--iss-amber); border: 1px solid var(--iss-line2); border-radius: 3px; padding: 3px 8px; }
.iss-notice span { flex: 1; min-width: 220px; line-height: 1.7; }
.iss-notice span b { color: var(--iss-ink); }

.iss-hero { display: grid; grid-template-columns: 1.08fr .92fr; gap: 22px; align-items: stretch; margin-bottom: 20px; }
.iss-hero > * { min-width: 0; }
.iss-kicker { display: inline-block; font: 800 10.5px var(--iss-mono); letter-spacing: 1.8px; color: var(--iss-blue); border-bottom: 1px solid var(--iss-line2); padding-bottom: 5px; margin-bottom: 14px; }
.iss-page h1 { font-size: 31px; line-height: 1.26; font-weight: 830; margin: 0 0 13px; letter-spacing: -.6px; }
.iss-sub { font-size: 14.5px; line-height: 2; color: var(--iss-sub); margin: 0 0 15px; }
.iss-sub b { color: var(--iss-ink); }
.iss-hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin-bottom: 15px; }
.iss-hero-facts > div { background: var(--iss-panel); border: 1px solid var(--iss-line2); border-radius: 8px; padding: 9px 11px; border-top: 3px solid var(--iss-blue); }
.iss-hero-facts > div:nth-child(2) { border-top-color: var(--iss-mint); }
.iss-hero-facts > div:nth-child(3) { border-top-color: var(--iss-violet); }
.iss-hero-facts b { display: block; font: 800 21px var(--iss-mono); }
.iss-hero-facts span { font-size: 11px; color: var(--iss-sub); }
.iss-hero-acts { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.iss-hero-tip { font-size: 11.5px; color: var(--iss-sub); }
.iss-btn {
    border: 1px solid var(--iss-line2); background: var(--iss-panel); color: var(--iss-ink);
    border-radius: 6px; padding: 9px 15px; font-size: 13.5px; font-weight: 680; cursor: pointer;
    font-family: inherit; transition: transform .12s, background .12s;
}
.iss-btn:hover { transform: translateY(-1px); border-color: var(--iss-blue); }
.iss-btn--main { background: var(--iss-blue); border-color: var(--iss-blue-deep); color: #fff; }
:root[data-theme="dark"] .iss-btn--main { color: #081631; }

.iss-sky { background: var(--iss-navy); color: #c9dcf7; border: 1px solid var(--iss-blue-deep); border-radius: 10px; padding: 14px; box-shadow: var(--iss-shadow); display: flex; flex-direction: column; }
.iss-sky-head { display: flex; justify-content: space-between; gap: 8px; font: 700 10.5px var(--iss-mono); letter-spacing: 1.3px; border-bottom: 1px dashed rgba(201,220,247,.28); padding-bottom: 8px; }
.iss-sky-head b { color: #7fb1ff; }
.iss-sky-head span { color: #93a9c9; }
.iss-sky-svg { width: 100%; max-height: 292px; margin: 10px auto; display: block; }
.iss-sky-horizon { fill: rgba(255,255,255,.025); stroke: #6687b5; stroke-width: 1.5; }
.iss-sky-ring { fill: none; stroke: #3d5a86; stroke-width: 1; stroke-dasharray: 4 5; }
.iss-sky-axis { stroke: #3d5a86; stroke-width: 1; stroke-dasharray: 3 5; }
.iss-sky-label { fill: #a8c4e8; font: 700 11px var(--iss-mono); }
.iss-sky-path { fill: none; stroke: #7fe0d2; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.iss-sky-peak { fill: #ffd479; stroke: #16294d; stroke-width: 1.5; }
.iss-sky-foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 5px; margin-top: auto; font: 600 10px var(--iss-mono); color: #93a9c9; }

.iss-body { display: grid; grid-template-columns: 296px 1fr; gap: 20px; align-items: start; }
.iss-body > * { min-width: 0; }
.iss-panel { background: var(--iss-panel); border: 1px solid var(--iss-line2); border-radius: 10px; padding: 18px; box-shadow: var(--iss-shadow-sm); position: sticky; top: 14px; }
.iss-panel h2, .iss-main h2 { font-size: 18px; margin: 0 0 4px; letter-spacing: -.2px; }
.iss-hint { font-size: 12.5px; color: var(--iss-sub); margin: 0 0 16px; line-height: 1.7; }
.iss-field { margin-bottom: 14px; }
.iss-label { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; font-weight: 700; margin-bottom: 7px; }
.iss-label em { font-style: normal; font: 500 10.5px var(--iss-mono); color: var(--iss-sub); text-align: right; }
.iss-input { width: 100%; box-sizing: border-box; border: 1px solid var(--iss-line2); background: var(--iss-panel2); color: var(--iss-ink); border-radius: 6px; padding: 9px 10px; font: 600 12.5px var(--iss-mono); outline: none; }
.iss-input:focus { border-color: var(--iss-blue); }
select.iss-input { font-family: inherit; font-size: 13px; }
.iss-inline { display: flex; gap: 7px; }
.iss-inline .iss-input { min-width: 0; }
.iss-seg { display: flex; flex-wrap: wrap; gap: 5px; }
.iss-seg button { flex: 1; min-width: 48px; border: 1px solid var(--iss-line2); background: var(--iss-panel2); color: var(--iss-sub); border-radius: 5px; padding: 6px 3px; font: 600 11.5px var(--iss-mono); cursor: pointer; font-family: var(--iss-mono); }
.iss-seg button.is-on { background: var(--iss-blue); color: #fff; border-color: var(--iss-blue-deep); }
:root[data-theme="dark"] .iss-seg button.is-on { color: #081631; }
.iss-params { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.iss-params label { font-size: 10.5px; color: var(--iss-sub); font-weight: 650; }
.iss-params .iss-input { margin-top: 3px; padding: 7px 8px; }
.iss-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.iss-actions .iss-btn--main { grid-column: 1 / -1; }
.iss-actions--row { display: flex; flex-wrap: wrap; margin: 12px 0; }
.iss-err { color: var(--iss-red); font-size: 12.5px; margin: 10px 0 0; }
.iss-err[hidden] { display: none; }
.iss-main { display: flex; flex-direction: column; gap: 18px; }
.iss-stats, .iss-conditions, .iss-passes, .iss-cities, .iss-theory { background: var(--iss-panel); border: 1px solid var(--iss-line2); border-radius: 10px; padding: 18px; box-shadow: var(--iss-shadow-sm); }
.iss-kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; margin-top: 14px; }
.iss-kpi { background: var(--iss-panel2); border: 1px solid var(--iss-line); border-left: 4px solid var(--iss-blue); border-radius: 6px; padding: 10px 12px; }
.iss-kpi span { display: block; font-size: 11.5px; color: var(--iss-sub); }
.iss-kpi b { display: block; font: 800 18px/1.4 var(--iss-mono); }
.iss-kpi em { display: block; font-style: normal; font-size: 11px; line-height: 1.65; color: var(--iss-sub); }
.iss-cond-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 10px; margin-top: 14px; }
.iss-cond { background: var(--iss-panel2); border: 1px solid var(--iss-line); border-radius: 7px; padding: 11px 12px; }
.iss-cond b { font-size: 13.5px; }
.iss-cond p { font-size: 11.5px; line-height: 1.8; color: var(--iss-sub); margin: 5px 0 0; }
.iss-section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.iss-section-head span { font: 600 11.5px var(--iss-mono); color: var(--iss-sub); }
.iss-scroll { overflow-x: auto; margin-top: 12px; }
.iss-table { width: 100%; border-collapse: collapse; font-size: 12px; min-width: 720px; }
.iss-table th { text-align: left; font: 700 10px var(--iss-mono); letter-spacing: .4px; color: var(--iss-sub); border-bottom: 2px solid var(--iss-line2); padding: 8px 9px; }
.iss-table td { border-bottom: 1px solid var(--iss-line); padding: 8px 9px; font-family: var(--iss-mono); }
.iss-table td:first-child { font-family: inherit; font-weight: 650; }
.iss-table tbody tr:hover { background: var(--iss-panel2); }
.iss-table tbody tr.is-good { background: rgba(31,138,123,.07); }
.iss-pill { display: inline-block; padding: 1px 7px; border-radius: 3px; font: 700 10px var(--iss-mono); }
.iss-pill.is-good { background: rgba(31,138,123,.14); color: var(--iss-mint); }
.iss-pill.is-day { background: rgba(200,138,22,.15); color: var(--iss-amber); }
.iss-pill.is-dark { background: rgba(192,74,62,.13); color: var(--iss-red); }
.iss-mini { border: 0; background: transparent; color: var(--iss-red); cursor: pointer; font-size: 12px; }
.iss-theory p { font-size: 13px; line-height: 1.95; color: var(--iss-sub); margin: 10px 0 0; }

.iss-modal[hidden] { display: none !important; }
.iss-modal { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; padding: 18px; background: rgba(8, 18, 36, .64); }
.iss-sheet { width: min(550px, 100%); max-height: 86vh; overflow: auto; background: var(--iss-panel); border: 1px solid var(--iss-line2); border-radius: 10px; padding: 20px; box-shadow: var(--iss-shadow); }
.iss-sheet-head { display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid var(--iss-blue); padding-bottom: 10px; margin-bottom: 12px; }
.iss-sheet-head b { font: 800 12.5px var(--iss-mono); letter-spacing: .6px; }
.iss-modal-x { border: 0; background: transparent; color: var(--iss-sub); font-size: 24px; line-height: 1; cursor: pointer; }
.iss-sheet p { font-size: 13.5px; line-height: 1.9; margin: 6px 0; }
.iss-sheet-acts { margin-top: 16px; text-align: right; }
.iss-toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(18px); z-index: 10000; background: var(--iss-ink); color: var(--iss-panel); padding: 9px 18px; border-radius: 5px; font: 600 13px var(--iss-mono); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; }
.iss-toast.is-on { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 980px) {
    .iss-hero, .iss-body { grid-template-columns: 1fr; }
    .iss-panel { position: static; }
    .iss-page h1 { font-size: 26px; }
}
@media (max-width: 560px) {
    .iss-wrap { padding: 12px 10px 0; }
    .iss-hero-facts { gap: 5px; }
    .iss-hero-facts b { font-size: 16px; }
    .iss-table { min-width: 680px; }
}