/* ============================================================
 * SolarCal — stylesheet
 * ============================================================ */
:root {
  --bg: #0e1420;
  --bg2: #151d2e;
  --card: #1a2438;
  --card2: #202c44;
  --line: rgba(148, 163, 198, .16);
  --tx: #e8edf7;
  --tx2: #93a0ba;
  --acc: #ffb520;
  --acc2: #ff8a00;
  --accSoft: rgba(255, 181, 32, .13);
  --good: #3ddc84;
  --goodSoft: rgba(61, 220, 132, .12);
  --bad: #ff5d6c;
  --badSoft: rgba(255, 93, 108, .12);
  --info: #4da3ff;
  --infoSoft: rgba(77, 163, 255, .12);
  --shadow: 0 8px 28px rgba(0, 0, 0, .35);
  --r: 14px;
}
html[data-theme="light"] {
  --bg: #f2f5fa;
  --bg2: #e9eef6;
  --card: #ffffff;
  --card2: #f4f7fc;
  --line: rgba(30, 45, 80, .13);
  --tx: #1c2536;
  --tx2: #5d6b85;
  --accSoft: rgba(255, 138, 0, .12);
  --shadow: 0 6px 22px rgba(25, 40, 80, .10);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans Thai', 'Sarabun', 'Leelawadee UI', -apple-system, 'Segoe UI', Tahoma, sans-serif;
  background: var(--bg);
  color: var(--tx);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
}
::selection { background: var(--acc); color: #14100a; }

/* ---------- layout ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 232px; flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--line);
  padding: 18px 12px;
  position: sticky; top: 0; height: 100vh;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 2px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 10px 16px;
}
.logo .sun { font-size: 30px; filter: drop-shadow(0 0 12px rgba(255, 181, 32, .6)); }
.logo b { font-size: 19px; letter-spacing: .3px; }
.logo small { display: block; color: var(--tx2); font-size: 11px; font-weight: 400; }

.nav-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 10px;
  color: var(--tx2); text-decoration: none;
  font-size: 14px; cursor: pointer; border: 0; background: none;
  width: 100%; text-align: right; font-family: inherit;
  transition: background .15s, color .15s;
  text-align: start;
}
.nav-btn .ic { width: 22px; text-align: center; font-size: 16px; }
.nav-btn:hover { background: var(--card); color: var(--tx); }
.nav-btn.active { background: var(--accSoft); color: var(--acc); font-weight: 600; }
html[data-theme="light"] .nav-btn.active { color: #c46a00; }
.nav-sep { margin: 10px 12px 4px; font-size: 11px; color: var(--tx2); text-transform: uppercase; letter-spacing: .8px; }
.sidebar .foot { margin-top: auto; padding: 12px 10px 4px; font-size: 11.5px; color: var(--tx2); }
.sidebar .foot a { color: var(--tx2); }

.main { flex: 1; min-width: 0; padding: 26px 30px 70px; max-width: 1180px; margin: 0 auto; }

/* topbar (mobile) */
.topbar {
  display: none; position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg2) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 10px 14px; align-items: center; gap: 12px;
}
.topbar .logo { padding: 0; }
.topbar .logo .sun { font-size: 22px; }
.topbar .logo b { font-size: 16px; }
.burger {
  border: 1px solid var(--line); background: var(--card); color: var(--tx);
  border-radius: 9px; padding: 7px 11px; font-size: 16px; cursor: pointer;
}
.theme-btn {
  margin-left: auto; border: 1px solid var(--line); background: var(--card);
  color: var(--tx); border-radius: 9px; padding: 6px 10px; cursor: pointer; font-size: 15px;
}
.sidebar .theme-btn { margin: 6px 10px 0; width: calc(100% - 20px); }

/* ---------- sections ---------- */
.section { display: none; animation: fadeIn .25s ease; }
.section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.sec-head { margin-bottom: 18px; }
.sec-head h1 { font-size: 24px; display: flex; align-items: center; gap: 10px; }
.sec-head p { color: var(--tx2); margin-top: 4px; max-width: 760px; font-size: 13.5px; }

/* ---------- cards & grids ---------- */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r); padding: 20px; box-shadow: var(--shadow);
  margin-bottom: 18px;
}
.card h2 { font-size: 16px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.card h2 .tag { font-size: 11px; background: var(--accSoft); color: var(--acc); padding: 2px 9px; border-radius: 20px; font-weight: 600; }
html[data-theme="light"] .card h2 .tag { color: #c46a00; }

.grid2 { display: grid; grid-template-columns: minmax(340px, 5fr) minmax(380px, 6fr); gap: 18px; align-items: start; }
@media (max-width: 1020px) { .grid2 { grid-template-columns: 1fr; } }

/* ---------- forms ---------- */
.f-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 12px 14px; }
.f-row { display: flex; flex-direction: column; gap: 5px; }
.f-row.wide { grid-column: 1 / -1; }
.f-row label { font-size: 12.5px; color: var(--tx2); display: flex; align-items: center; gap: 5px; }
.f-wrap { position: relative; display: flex; }
.f-row input[type="number"], .f-row input[type="text"], .f-row select {
  width: 100%; background: var(--bg); color: var(--tx);
  border: 1px solid var(--line); border-radius: 9px;
  padding: 8px 11px; font-size: 14.5px; font-family: inherit;
  transition: border .15s, box-shadow .15s;
}
.f-row input:focus, .f-row select:focus {
  outline: none; border-color: var(--acc);
  box-shadow: 0 0 0 3px var(--accSoft);
}
.f-wrap .unit {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  font-size: 11.5px; color: var(--tx2); pointer-events: none;
  background: var(--bg); padding-left: 4px;
}
.f-wrap input { padding-right: 58px; }
.f-row select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--tx2) 50%), linear-gradient(135deg, var(--tx2) 50%, transparent 50%); background-position: calc(100% - 16px) 55%, calc(100% - 11px) 55%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 30px; }

.chk { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--tx); cursor: pointer; padding-top: 20px; }
.chk input { width: 17px; height: 17px; accent-color: var(--acc); cursor: pointer; }

.help {
  cursor: help; color: var(--tx2); border: 1px solid var(--line);
  border-radius: 50%; width: 15px; height: 15px; font-size: 10px;
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
}

details.adv { grid-column: 1 / -1; border-top: 1px dashed var(--line); padding-top: 10px; margin-top: 4px; }
details.adv summary {
  cursor: pointer; color: var(--info); font-size: 13px; font-weight: 600;
  list-style: none; display: flex; align-items: center; gap: 6px; user-select: none;
}
details.adv summary::before { content: '▸'; transition: transform .15s; }
details.adv[open] summary::before { transform: rotate(90deg); }
details.adv .f-grid { margin-top: 12px; }

.btn {
  background: linear-gradient(135deg, var(--acc), var(--acc2));
  color: #201200; font-weight: 700; border: 0; border-radius: 10px;
  padding: 9px 18px; font-size: 14px; cursor: pointer; font-family: inherit;
  transition: filter .15s, transform .1s;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(.97); }
.btn.ghost {
  background: var(--card2); color: var(--tx); border: 1px solid var(--line); font-weight: 500;
}
.btn.small { padding: 5px 12px; font-size: 12.5px; border-radius: 8px; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

/* ---------- results ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); gap: 11px; margin-bottom: 14px; }
.kpi {
  background: var(--card2); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 14px;
}
.kpi .t { font-size: 11.5px; color: var(--tx2); margin-bottom: 3px; }
.kpi .v { font-size: 21px; font-weight: 700; line-height: 1.2; }
.kpi .v small { font-size: 12px; font-weight: 500; color: var(--tx2); margin-left: 3px; }
.kpi.hero { background: linear-gradient(135deg, var(--accSoft), transparent); border-color: color-mix(in srgb, var(--acc) 40%, transparent); }
.kpi.hero .v { color: var(--acc); }
html[data-theme="light"] .kpi.hero .v { color: #c46a00; }
.kpi.good .v { color: var(--good); }
.kpi.bad .v { color: var(--bad); }
.kpi.info .v { color: var(--info); }

.note {
  border-radius: 10px; padding: 10px 14px; font-size: 13px; margin: 10px 0;
  border: 1px solid;
}
.note.warn { background: var(--badSoft); border-color: color-mix(in srgb, var(--bad) 40%, transparent); color: var(--bad); }
.note.ok { background: var(--goodSoft); border-color: color-mix(in srgb, var(--good) 40%, transparent); color: var(--good); }
.note.info { background: var(--infoSoft); border-color: color-mix(in srgb, var(--info) 40%, transparent); color: var(--info); }
html[data-theme="light"] .note.ok { color: #157a47; }
html[data-theme="light"] .note.warn { color: #c22636; }
html[data-theme="light"] .note.info { color: #1d6ec2; }

/* ---------- tables ---------- */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 11px; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 520px; }
.tbl th {
  background: var(--card2); color: var(--tx2); font-weight: 600;
  text-align: start; padding: 9px 12px; font-size: 12px; white-space: nowrap;
  position: sticky; top: 0;
}
.tbl td { padding: 8px 12px; border-top: 1px solid var(--line); white-space: nowrap; }
.tbl td.num, .tbl th.num { text-align: end; font-variant-numeric: tabular-nums; }
.tbl tr.hl td { background: var(--accSoft); font-weight: 600; }
.tbl tr.dim td { color: var(--tx2); }
.tbl .ok { color: var(--good); font-weight: 600; }
.tbl .no { color: var(--bad); }

/* ---------- load table ---------- */
.load-tbl input[type="number"], .load-tbl input[type="text"], .load-tbl select {
  background: var(--bg); color: var(--tx); border: 1px solid var(--line);
  border-radius: 7px; padding: 5px 8px; font-size: 13px; font-family: inherit; width: 100%;
}
.load-tbl input:focus, .load-tbl select:focus { outline: none; border-color: var(--acc); }
.load-tbl td { padding: 5px 6px; }
.load-tbl .del {
  background: none; border: 0; color: var(--bad); cursor: pointer; font-size: 15px;
  padding: 3px 7px; border-radius: 6px;
}
.load-tbl .del:hover { background: var(--badSoft); }
.load-tbl input.w-name { min-width: 150px; }
.load-tbl input.w-num { width: 74px; text-align: end; }

canvas.chart { width: 100%; display: block; }

/* ---------- misc ---------- */
.pill-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0 14px; }
.pill {
  border: 1px solid var(--line); background: var(--card2); color: var(--tx2);
  border-radius: 20px; padding: 5px 14px; font-size: 13px; cursor: pointer; font-family: inherit;
  transition: all .15s;
}
.pill:hover { border-color: var(--acc); color: var(--tx); }
.pill.on { background: var(--accSoft); border-color: var(--acc); color: var(--acc); font-weight: 600; }
html[data-theme="light"] .pill.on { color: #c46a00; }

.home-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.home-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
  padding: 18px; cursor: pointer; transition: transform .15s, border-color .15s;
  display: flex; flex-direction: column; gap: 6px; text-align: start; font-family: inherit; color: var(--tx);
}
.home-card:hover { transform: translateY(-3px); border-color: var(--acc); }
.home-card .ic { font-size: 26px; }
.home-card b { font-size: 15.5px; }
.home-card span { color: var(--tx2); font-size: 12.5px; line-height: 1.45; }

.formula {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 16px; font-size: 13.5px; margin: 8px 0;
  overflow-x: auto;
}
.formula code { font-family: 'SF Mono', Consolas, monospace; color: var(--acc); font-size: 12.5px; }
html[data-theme="light"] .formula code { color: #b35f00; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 22px; font-size: 13.5px; }
.two-col > div { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px dashed var(--line); }
.two-col > div span:first-child { color: var(--tx2); }
.two-col > div span:last-child { font-weight: 600; font-variant-numeric: tabular-nums; text-align: end; }
@media (max-width: 640px) { .two-col { grid-template-columns: 1fr; } }

.sr-note { font-size: 12px; color: var(--tx2); margin-top: 10px; line-height: 1.6; }

/* ---------- responsive ---------- */
@media (max-width: 840px) {
  .topbar { display: flex; }
  .sidebar {
    position: fixed; z-index: 60; left: 0; top: 0; bottom: 0;
    transform: translateX(-100%); transition: transform .22s ease;
    box-shadow: 0 0 40px rgba(0,0,0,.5); height: 100dvh;
  }
  .sidebar.open { transform: none; }
  .backdrop {
    display: none; position: fixed; inset: 0; z-index: 50;
    background: rgba(5, 8, 15, .55);
  }
  .backdrop.show { display: block; }
  .main { padding: 18px 14px 60px; }
  .kpi .v { font-size: 18px; }
  .sec-head h1 { font-size: 20px; }
}

/* ---------- print ---------- */
@media print {
  .sidebar, .topbar, .btn-row, .backdrop, .no-print { display: none !important; }
  body { background: #fff; color: #111; font-size: 12px; }
  .main { padding: 0; max-width: none; }
  .card { box-shadow: none; border-color: #ccc; break-inside: avoid; background: #fff; }
  .kpi { border-color: #ccc; background: #fafafa; }
  .section { display: none !important; }
  .section.active { display: block !important; }
  :root { --tx: #111; --tx2: #555; --card2: #f5f5f5; --line: #ccc; --bg: #fff; }
}