/* gpa.pocketplay.win — PocketPlay paper and ink, thin rules, fountain-pen blue accent, red pen for the best value. */
:root {
  --paper: #f4eee2;
  --paper-2: #fbf8f1;
  --paper-3: #efe7d6;
  --ink: #1e1b16;
  --ink-2: #5a5244;
  --ink-3: #8a806f;
  --line: #dcd2bf;
  --line-2: #c9bda6;
  --accent: #27458f;
  --accent-2: #e3e8f5;
  --on-accent: #fff;
  --red: #b4402b;
  --red-2: #f6e3dc;
  --ok: #2d6a46;
  --shadow: 0 1px 0 rgba(60, 45, 20, 0.04), 0 8px 28px -14px rgba(60, 45, 20, 0.28);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --r: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1a1713; --paper-2: #221e19; --paper-3: #2a251f; --ink: #efe8d9; --ink-2: #bdb19c; --ink-3: #8d8371;
    --line: #3a342b; --line-2: #4a4237; --accent: #9db2ec; --accent-2: #26304a; --on-accent: #111827;
    --red: #ec8c76; --red-2: #3b2620; --ok: #8fd0a6; --shadow: 0 10px 30px -18px rgba(0, 0, 0, 0.8); color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--sans); }
:root:lang(en) { --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif; --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Songti SC", "Noto Serif CJK SC", serif; }
a { color: var(--accent); text-underline-offset: 2px; }
button, input, select, textarea { font: inherit; color: inherit; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- top bar ---------- */
.top { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: saturate(1.2) blur(8px); border-bottom: 1px solid var(--line); }
.top-in { max-width: 1180px; margin: 0 auto; padding: 0 16px; height: 54px; display: flex; align-items: center; gap: 18px; }
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--ink); font-family: var(--serif); font-size: 19px; font-weight: 700; white-space: nowrap; }
.brand .seal { width: 28px; height: 28px; flex: none; }
.brand small { font: 500 12px/1 var(--sans); color: var(--ink-3); letter-spacing: 0.02em; }
.nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; margin-left: auto; }
.nav::-webkit-scrollbar { display: none; }
.nav a { padding: 6px 10px; border-radius: 999px; color: var(--ink-2); text-decoration: none; font-size: 14.5px; white-space: nowrap; }
.nav a:hover { background: var(--paper-3); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--paper-3); font-weight: 600; }
.nav .lang { border: 1px solid var(--line-2); }
@media (max-width: 760px) {
  .top-in { height: auto; flex-wrap: wrap; gap: 4px 12px; padding: 8px 16px 6px; }
  .nav { margin: 0 -16px; padding: 0 12px 2px; width: calc(100% + 32px); }
  .brand small { display: none; }
}

/* ---------- page ---------- */
main { max-width: 1180px; margin: 0 auto; padding: 0 16px 40px; }
.hero { padding: 26px 0 16px; max-width: 760px; }
.hero h1 { font: 700 clamp(30px, 5vw, 46px)/1.08 var(--serif); margin: 0 0 10px; letter-spacing: -0.01em; }
.hero p { margin: 0; color: var(--ink-2); font-size: 17px; }
.hero .chips-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.hero .chips-row span { font-size: 13px; padding: 3px 10px; border: 1px solid var(--line-2); border-radius: 999px; color: var(--ink-2); background: var(--paper-2); }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 38px; padding: 7px 14px; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: var(--on-accent); font-weight: 600; font-size: 14.5px; cursor: pointer; text-decoration: none; }
.btn:hover { filter: brightness(1.06); }
.btn:disabled { opacity: 0.45; cursor: default; filter: none; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn--ghost:hover { background: var(--paper-3); }
.btn--text { background: transparent; border-color: transparent; color: var(--ink-2); font-weight: 500; }
.btn--text:hover { color: var(--red); }

/* ---------- tool layout ---------- */
.tool { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 20px; align-items: start; }
@media (max-width: 960px) { .tool { grid-template-columns: minmax(0, 1fr); } }
.editor { min-width: 0; }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.tb-mode { display: flex; align-items: center; gap: 10px; }
.tb-label { font-size: 13.5px; color: var(--ink-2); }
.tb-actions { display: flex; align-items: center; gap: 8px; position: relative; }
.seg { display: inline-flex; padding: 3px; border: 1px solid var(--line-2); border-radius: 9px; background: var(--paper-2); }
.seg button { border: 0; background: transparent; padding: 5px 12px; border-radius: 6px; font-size: 14px; color: var(--ink-2); cursor: pointer; min-height: 32px; }
.seg button[aria-checked="true"] { background: var(--ink); color: var(--paper); font-weight: 600; }
.btn--paste { background: var(--paper-2); color: var(--ink); border-color: var(--line-2); }
.btn--paste svg { color: var(--accent); }
.settings > summary { list-style: none; cursor: pointer; padding: 7px 12px; min-height: 38px; display: flex; align-items: center; border-radius: 8px; border: 1px solid var(--line-2); font-size: 14.5px; background: var(--paper-2); }
.settings > summary::-webkit-details-marker { display: none; }
.settings > summary::after { content: ""; width: 7px; height: 7px; margin-left: 8px; border: solid var(--ink-3); border-width: 0 1.6px 1.6px 0; transform: rotate(45deg) translateY(-2px); }
.settings[open] > summary { background: var(--paper-3); }
.settings-body { position: absolute; right: 0; top: calc(100% + 6px); z-index: 20; width: min(330px, calc(100vw - 32px)); padding: 14px; background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--r); box-shadow: var(--shadow); display: grid; gap: 10px; }
.settings-body label, .five label { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 14px; }
.settings-body select, .settings-body input { min-height: 34px; border: 1px solid var(--line-2); border-radius: 7px; background: var(--paper); padding: 4px 8px; }
.settings-body input { width: 70px; text-align: right; }
.five { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px 10px; margin: 0; display: grid; gap: 6px; }
.five legend { font-size: 13px; color: var(--ink-2); padding: 0 4px; }
.hint { font-size: 12.5px; color: var(--ink-3); margin: 0; line-height: 1.5; }

/* semester card */
.sems { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; }
.sems-wrap { position: relative; }
/* Wide screens: the course list keeps the tool inside one screen and scrolls on its own. */
@media (min-width: 961px) {
  .sems { max-height: max(380px, calc(100vh - 230px)); max-height: max(380px, calc(100dvh - 230px)); overflow-y: auto; padding: 2px 8px 10px 2px; margin: -2px -8px -10px -2px; scrollbar-width: thin; scrollbar-color: var(--line-2) transparent; }
  .sems::-webkit-scrollbar { width: 8px; }
  .sems::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 8px; }
  .sems-wrap::before, .sems-wrap::after { content: ""; position: absolute; left: 0; right: 8px; height: 26px; pointer-events: none; z-index: 3; opacity: 0; transition: opacity 0.15s; }
  .sems-wrap::before { top: 0; background: linear-gradient(var(--paper), transparent); }
  .sems-wrap::after { bottom: -10px; background: linear-gradient(transparent, var(--paper)); }
  .sems-wrap.more-up::before, .sems-wrap.more-down::after { opacity: 1; }
  .sem-head { position: sticky; top: 0; z-index: 2; background: var(--paper-2); }
  .editor-foot { margin-top: 22px; }
  .results { max-height: calc(100vh - 86px); max-height: calc(100dvh - 86px); overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--line-2) transparent; }
}
.sem { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); padding: 4px 14px 10px; position: relative; }
.sem::before { content: ""; position: absolute; left: 44px; top: 0; bottom: 0; width: 1px; background: color-mix(in srgb, var(--red) 25%, transparent); pointer-events: none; }
.sem-head { display: flex; align-items: center; gap: 10px; padding: 8px 0 6px; border-bottom: 1px solid var(--line); }
.sem-name { flex: 1; min-width: 0; width: 100%; border: 0; background: transparent; font: 700 18px/1.3 var(--serif); padding: 4px 0; }
.sem-name:hover, .sem-name:focus { background: var(--paper-3); border-radius: 6px; padding-left: 6px; }
.sem-gpa { font: 700 18px/1 var(--serif); color: var(--accent); font-variant-numeric: tabular-nums; }
.sem-del { border: 0; background: transparent; color: var(--ink-3); font-size: 13px; cursor: pointer; padding: 6px; }
.sem-del:hover { color: var(--red); }

.row { display: grid; grid-template-columns: minmax(0, 1fr) 78px 104px 34px 30px; gap: 8px; align-items: center; padding: 5px 0; border-bottom: 1px dashed var(--line); }
.sem--hs .row { grid-template-columns: minmax(0, 1fr) 70px 92px 118px 34px 30px; }
.row--head { font-size: 12px; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; padding: 8px 0 2px; border-bottom: 0; }
.row--head .th-major { text-align: center; }
.row--head span:first-child { padding-left: 34px; }
.row input, .row select { width: 100%; min-width: 0; min-height: 38px; border: 1px solid transparent; border-radius: 7px; background: transparent; padding: 6px 8px; font-size: 15.5px; }
.row input:hover, .row select:hover { border-color: var(--line); }
.row input:focus, .row select:focus { border-color: var(--accent); background: var(--paper); outline: none; box-shadow: 0 0 0 3px var(--accent-2); }
.row .c-name { padding-left: 34px; }
.row .c-cr, .row .c-gr { font-variant-numeric: tabular-nums; text-align: center; border-color: var(--line); background: var(--paper); }
.row select.c-gr, .row .c-type { border-color: var(--line); background-color: var(--paper); padding-right: 4px; }
.row select.c-gr { text-align: center; font-weight: 600; }
.row.is-bad .c-gr, .row.is-bad .c-cr { border-color: var(--red); background: var(--red-2); }
.c-major, .c-del { width: 30px; height: 30px; border-radius: 7px; border: 0; background: transparent; color: var(--ink-3); cursor: pointer; display: grid; place-items: center; padding: 0; justify-self: center; }
.c-major { color: var(--line-2); }
.c-major:hover { color: var(--ink-3); }
.c-major[aria-pressed="true"] { color: #c58a12; }
.c-del:hover { color: var(--red); background: var(--red-2); }
.add-row { margin-top: 6px; border: 0; background: transparent; color: var(--accent); font-weight: 600; font-size: 14.5px; padding: 6px 2px 6px 34px; cursor: pointer; }
.add-row:hover { text-decoration: underline; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 0 8px 34px; }
.chips button { border: 1px solid var(--line-2); background: var(--paper); border-radius: 999px; padding: 3px 11px; font-size: 13.5px; cursor: pointer; min-height: 30px; }
.chips button:hover { border-color: var(--accent); color: var(--accent); }

.editor-foot { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 12px; margin-top: 14px; }
.prior { display: grid; gap: 8px; justify-items: end; }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 14.5px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.prior-fields { display: flex; gap: 10px; }
.prior-fields label { display: grid; gap: 3px; font-size: 12.5px; color: var(--ink-2); }
.prior-fields input { width: 110px; max-width: 100%; min-height: 38px; border: 1px solid var(--line-2); border-radius: 7px; background: var(--paper-2); padding: 6px 8px; font-variant-numeric: tabular-nums; }

@media (max-width: 640px) {
  .sem { padding: 2px 10px 8px; }
  .sem::before { display: none; }
  .row.row--head { display: grid; grid-template-areas: "cr gr major del"; padding: 6px 0 0; border: 0; font-size: 11px; }
  .sem--hs .row.row--head { grid-template-areas: "cr gr type major del"; }
  .row--head span:first-child { display: none; }
  .row--head span:nth-child(2) { grid-area: cr; text-align: center; }
  .row--head span:nth-child(3) { grid-area: gr; text-align: center; }
  .sem--hs .row--head span:nth-child(4) { grid-area: type; text-align: center; }
  .row--head .th-major { grid-area: major; }
  .row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 30px 28px; grid-template-areas: "name name name name" "cr gr major del"; gap: 4px 6px; padding: 8px 0; }
  .sem--hs .row { grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr) minmax(0, 1.2fr) 30px 28px; grid-template-areas: "name name name name name" "cr gr type major del"; }
  .row .c-name { grid-area: name; padding-left: 8px; font-weight: 600; }
  .row .c-cr { grid-area: cr; }
  .row .c-gr { grid-area: gr; }
  .row .c-type { grid-area: type; }
  .row .c-major { grid-area: major; }
  .row .c-del { grid-area: del; }
  .row .c-cr::placeholder { font-size: 13px; }
  .add-row, .chips { padding-left: 2px; }
  .toolbar { gap: 8px; }
  .tb-mode { width: 100%; justify-content: space-between; }
  .tb-actions { width: 100%; }
  .tb-actions .btn--paste { flex: 1; }
  .prior { justify-items: start; width: 100%; }
  .editor-foot { flex-direction: column-reverse; }
  .editor-foot .add-sem { width: 100%; }
}

/* ---------- results ---------- */
.results { position: sticky; top: 70px; background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 14px; box-shadow: var(--shadow); padding: 18px 18px 14px; overflow: hidden; scroll-margin-top: 70px; }
.results::after { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: repeating-linear-gradient(90deg, var(--accent) 0 18px, transparent 18px 22px); opacity: 0.85; }
@media (max-width: 960px) { .results { position: static; margin-top: 4px; } }
.r-label { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); }
.r-big { font: 700 64px/1 var(--serif); letter-spacing: -0.02em; font-variant-numeric: tabular-nums lining-nums; margin: 4px 0 4px; color: var(--ink); }
.r-big small { font: 500 18px var(--sans); color: var(--ink-3); letter-spacing: 0; }
.r-big--empty { color: var(--line-2); }
.r-sub { font-size: 13.5px; color: var(--ink-2); }
.r-list { margin: 14px 0 0; padding: 0; border-top: 1px solid var(--line); }
.r-row { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.r-row dt { font-size: 14px; color: var(--ink-2); }
.r-row dd { margin: 0; font: 700 19px var(--serif); font-variant-numeric: tabular-nums; }
.r-row--strong dd { color: var(--accent); font-size: 22px; }
.r-trend { margin: 14px 0 0; }
.r-trend figcaption, .r-scales h3 { font: 600 12.5px/1 var(--sans); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-2); margin: 0 0 6px; }
.r-trend svg { width: 100%; height: auto; display: block; }
.t-axis { stroke: var(--line-2); stroke-width: 1; }
.t-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.t-dot { fill: var(--paper-2); stroke: var(--accent); stroke-width: 2; }
.t-val { font: 600 10.5px var(--sans); fill: var(--ink-2); text-anchor: middle; }
.r-scales { margin-top: 16px; }
.r-scales table { width: 100%; border-collapse: collapse; font-size: 14px; }
.r-scales tr.g th { text-align: left; font-size: 11.5px; color: var(--ink-3); font-weight: 600; padding: 10px 0 3px; text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 1px solid var(--line); }
.r-scales th[scope="row"] { text-align: left; font-weight: 500; padding: 6px 0; }
.r-scales th a { color: var(--ink); text-decoration: none; border-bottom: 1px dotted var(--ink-3); }
.r-scales th a:hover { color: var(--accent); border-color: var(--accent); }
.r-scales td { text-align: right; font: 700 16px var(--serif); font-variant-numeric: tabular-nums; }
.r-scales tr:not(.g) { border-bottom: 1px dashed var(--line); }
.r-scales tr.top td { color: var(--red); }
.badge { display: inline-block; margin-left: 6px; font: 700 10.5px/1 var(--sans); padding: 3px 6px; border-radius: 4px; color: var(--red); background: var(--red-2); vertical-align: 1px; text-transform: uppercase; letter-spacing: 0.04em; }
.r-scales .hint { margin-top: 8px; }
.r-notes { margin: 12px 0 0; padding: 0 0 0 18px; font-size: 13px; color: var(--ink-2); }
.r-notes .warn { color: var(--red); }
.r-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); }
.r-actions .btn { min-height: 34px; padding: 5px 11px; font-size: 13.5px; }
.r-actions .btn--text { margin-left: auto; }
.r-plan { display: block; margin-top: 10px; font-size: 14px; font-weight: 600; }

.mbar { display: none; }
@media (max-width: 960px) {
  .mbar { position: fixed; left: 12px; right: 12px; bottom: calc(10px + env(safe-area-inset-bottom)); z-index: 40; display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-radius: 12px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.45); cursor: pointer; transition: transform 0.2s, opacity 0.2s; text-align: left; }
  .mbar.off, .mbar.empty { transform: translateY(140%); opacity: 0; pointer-events: none; }
  .mbar .mb-l { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; opacity: 0.75; }
  .mbar b { font: 700 24px/1 var(--serif); font-variant-numeric: tabular-nums; }
  .mbar .mb-s { font-size: 13px; opacity: 0.75; flex: 1; }
  .mbar .mb-go { font-size: 13px; font-weight: 600; }
  .mbar .mb-go::after { content: " ↓"; }
  body { padding-bottom: 70px; }
}

/* ---------- toast ---------- */
.toast { position: fixed; left: 50%; bottom: calc(84px + env(safe-area-inset-bottom)); transform: translate(-50%, 20px); opacity: 0; pointer-events: none; z-index: 60; background: var(--ink); color: var(--paper); padding: 10px 14px; border-radius: 10px; font-size: 14px; display: flex; gap: 14px; align-items: center; max-width: calc(100vw - 32px); transition: opacity 0.2s, transform 0.2s; box-shadow: 0 8px 24px -8px rgba(0, 0, 0, 0.5); }
.toast.on { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.toast-act { border: 0; background: transparent; color: var(--accent-2); font-weight: 700; cursor: pointer; padding: 2px 4px; }
@media (min-width: 961px) { .toast { bottom: 24px; } }

/* ---------- paste dialog ---------- */
dialog { border: 0; padding: 0; background: transparent; color: var(--ink); max-width: min(760px, calc(100vw - 24px)); width: 100%; }
dialog::backdrop { background: rgba(25, 20, 12, 0.45); }
.dlg { background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); max-height: calc(100dvh - 32px); overflow: auto; }
.dlg-head { display: flex; justify-content: space-between; align-items: center; }
.dlg-head h2 { margin: 0; font: 700 22px var(--serif); }
.dlg-x { border: 0; background: transparent; font-size: 26px; line-height: 1; cursor: pointer; color: var(--ink-3); width: 36px; height: 36px; }
.paste-steps { margin: 10px 0 12px; padding-left: 20px; color: var(--ink-2); font-size: 14px; }
.paste-area { width: 100%; border: 1.5px dashed var(--line-2); border-radius: 10px; background: var(--paper); padding: 10px 12px; font: 13.5px/1.5 var(--mono); resize: vertical; min-height: 130px; }
.paste-area:focus { border-color: var(--accent); outline: none; }
.paste-header { margin: 8px 0 0; font-size: 13.5px; }
.paste-status { margin: 8px 0; font-weight: 600; font-size: 14px; }
.paste-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
.paste-preview table { border-collapse: collapse; font-size: 13px; min-width: 100%; }
.paste-preview th { padding: 6px; background: var(--paper-3); text-align: left; }
.paste-preview th select { font-size: 12.5px; border: 1px solid var(--line-2); border-radius: 6px; padding: 3px 4px; background: var(--paper-2); min-width: 86px; }
.paste-preview th select.role-skip { color: var(--ink-3); }
.paste-preview td { padding: 5px 8px; border-top: 1px solid var(--line); white-space: nowrap; max-width: 260px; overflow: hidden; text-overflow: ellipsis; }
.paste-preview td.role-skip { color: var(--ink-3); text-decoration: line-through; text-decoration-color: var(--line-2); }
.paste-preview td.role-grade, .paste-preview td.role-credits { font-weight: 700; color: var(--accent); }
.paste-preview tr.is-header td { color: var(--ink-3); font-style: italic; text-decoration: none; }
.dlg-row { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.dlg .hint { margin-top: 8px; }

/* ---------- planner ---------- */
.planner { display: grid; grid-template-columns: minmax(0, 360px) minmax(0, 1fr); gap: 20px; background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); }
@media (max-width: 760px) { .planner { grid-template-columns: minmax(0, 1fr); } }
.pl-form { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; align-content: start; }
.pl-f { display: grid; min-width: 0; gap: 4px; font-size: 13.5px; color: var(--ink-2); }
.pl-f input, .pl-f select { width: 100%; min-width: 0; min-height: 42px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--paper); padding: 6px 10px; font-size: 17px; color: var(--ink); font-variant-numeric: tabular-nums; }
.pl-f input:focus, .pl-f select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-2); }
.pl-out { min-width: 0; }
.pl-big { margin: 0 0 12px; display: grid; gap: 2px; font-size: 15px; color: var(--ink-2); }
.pl-big b { font: 700 54px/1.05 var(--serif); color: var(--accent); font-variant-numeric: tabular-nums; }
.pl-big.ok { font: 700 22px var(--serif); color: var(--ok); }
.pl-big.warn span { color: var(--red); font-weight: 600; }
.pl-big small { font-size: 13.5px; color: var(--ink-2); }
.pl-empty { color: var(--ink-3); margin: 0; }
.pl-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.pl-table th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3); font-weight: 600; padding: 4px 0; border-bottom: 1px solid var(--line); }
.pl-table td { padding: 6px 0; border-bottom: 1px dashed var(--line); font-variant-numeric: tabular-nums; font-family: var(--serif); font-weight: 700; }
.pl-table tr.hit td:last-child { color: var(--ok); }
.pl-table tr.hit td:last-child::after { content: " ✓"; }

/* ---------- converter ---------- */
.conv { background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 14px; padding: 18px; box-shadow: var(--shadow); display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 20px; }
@media (max-width: 760px) { .conv { grid-template-columns: minmax(0, 1fr); } }
.conv-in { display: grid; gap: 12px; align-content: start; }
.conv-in label { display: grid; min-width: 0; gap: 4px; font-size: 13.5px; color: var(--ink-2); }
.conv-in input, .conv-in select { width: 100%; min-width: 0; min-height: 44px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--paper); padding: 6px 10px; font-size: 18px; color: var(--ink); font-variant-numeric: tabular-nums; }
.conv-in input:focus, .conv-in select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-2); }
.conv-in .row2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; }
.conv-out { min-width: 0; display: grid; gap: 0; align-content: start; }
.conv-res { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.conv-res:first-child { padding-top: 0; }
.conv-res .k { font-size: 14px; color: var(--ink-2); }
.conv-res .k small { display: block; font-size: 12px; color: var(--ink-3); }
.conv-res .v { font: 700 26px/1.1 var(--serif); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.conv-res.main .v { font-size: 44px; color: var(--accent); }
.conv-res .v small { font: 500 13px var(--sans); color: var(--ink-3); }
.conv-note { font-size: 13px; color: var(--ink-3); margin: 10px 0 0; }

/* ---------- article ---------- */
.content { max-width: 760px; margin: 40px 0 0; }
.content h2 { font: 700 27px/1.25 var(--serif); margin: 38px 0 10px; letter-spacing: -0.005em; }
.content h3 { font: 700 19px/1.3 var(--serif); margin: 24px 0 6px; }
.content p, .content li { color: var(--ink); }
.content ul, .content ol { padding-left: 22px; }
.content code, .formula { font-family: var(--mono); font-size: 14.5px; background: var(--paper-3); padding: 1px 6px; border-radius: 5px; }
.formula { display: block; padding: 10px 14px; margin: 10px 0; border-left: 3px solid var(--accent); font-size: 15px; overflow-x: auto; }
.tbl { overflow-x: auto; margin: 12px 0 6px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper-2); }
.tbl table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
.tbl th, .tbl td { padding: 7px 12px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl thead th { background: var(--paper-3); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-2); }
.tbl td.n { font-variant-numeric: tabular-nums; font-weight: 600; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl-cap { font-size: 13px; color: var(--ink-3); margin: 0 0 14px; }
.src { font-size: 13px; color: var(--ink-3); }
.callout { border: 1px solid var(--line-2); background: var(--paper-2); border-radius: 10px; padding: 12px 16px; margin: 16px 0; font-size: 15px; }
.callout strong { color: var(--red); }
.content details { border-bottom: 1px solid var(--line); padding: 10px 0; }
.content summary { cursor: pointer; font-weight: 600; font-size: 16px; }
.content details p { margin: 8px 0 2px; color: var(--ink-2); }
.sources { font-size: 14px; }
.sources li { margin: 4px 0; color: var(--ink-2); }
.sources a { word-break: break-word; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; margin: 14px 0; }
.cards a { display: block; padding: 12px 14px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--paper-2); text-decoration: none; color: var(--ink); }
.cards a:hover { border-color: var(--accent); }
.cards b { display: block; font: 700 17px var(--serif); }
.cards span { font-size: 13.5px; color: var(--ink-2); }
.anchor { scroll-margin-top: 80px; }
.anchor:target { background: var(--accent-2); border-radius: 8px; }

/* ---------- ads (reserved, hidden while off) ---------- */
.ad-slot { margin: 26px auto; max-width: 970px; min-height: 90px; display: flex; justify-content: center; }

/* ---------- footer ---------- */
.foot { border-top: 1px solid var(--line); margin-top: 50px; }
.foot-in { max-width: 1180px; margin: 0 auto; padding: 22px 16px 30px; font-size: 13.5px; color: var(--ink-3); }
.foot nav { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-bottom: 10px; }
.foot nav a { color: var(--ink-2); text-decoration: none; }
.foot nav a:hover { color: var(--accent); }
.foot p { margin: 4px 0; max-width: 760px; }

/* ---------- print: a clean GPA report ---------- */
@media print {
  @page { margin: 14mm; }
  body { background: #fff; color: #000; font-size: 11pt; padding: 0; }
  .top, .hero p, .hero .chips-row, .toolbar, .add-row, .add-sem, .c-del, .c-major, .sem-del, .mbar, .r-actions, .r-plan, .content, .foot, .ad-slot, .toast, .chips, .prior .check, .planner-wrap, .r-scales .hint { display: none !important; }
  .hero { padding: 0 0 6px; }
  .hero h1 { font-size: 20pt; }
  .tool { display: block; }
  .sems, .results { max-height: none !important; overflow: visible !important; }
  .sems-wrap::before, .sems-wrap::after { display: none; }
  .sem-head { position: static; }
  .results { position: static; box-shadow: none; border: 1px solid #000; margin-top: 10px; break-inside: avoid; }
  .results::after { display: none; }
  .sem { box-shadow: none; border: 1px solid #999; break-inside: avoid; margin-bottom: 8px; }
  .sem::before { display: none; }
  .row { grid-template-columns: minmax(0, 1fr) 60px 70px !important; grid-template-areas: none !important; border-bottom: 1px solid #ddd; }
  .row input, .row select { border: 0 !important; background: none !important; appearance: none; -webkit-appearance: none; padding: 2px; min-height: 0; box-shadow: none !important; }
  .row .c-name { padding-left: 2px; }
  .row--head { display: grid !important; }
  .row--head span:nth-child(n+4) { display: none; }
  .sem--hs .row .c-type { display: none; }
}

/* ---------- additions ---------- */
.planner-wrap { margin-top: 34px; }
.sec-h { font: 700 24px/1.25 var(--serif); margin: 0 0 12px; }
.tbl--matrix th, .tbl--matrix td { text-align: center; padding: 6px 9px; }
.tbl--matrix thead th { position: sticky; top: 0; white-space: normal; min-width: 64px; line-height: 1.25; }
.tbl--matrix thead th a { color: var(--ink-2); text-decoration: none; }
.tbl--matrix tbody th { text-align: left; position: sticky; left: 0; background: var(--paper-2); font-variant-numeric: tabular-nums; }
.tbl--matrix tbody tr:hover td, .tbl--matrix tbody tr:hover th { background: var(--accent-2); }
.tbl--cam td, .tbl--cam th { white-space: normal; vertical-align: top; min-width: 90px; }
.tbl--cam tbody th { font-family: var(--serif); background: var(--paper-3); }
.tbl tbody th[scope="row"] { text-align: left; color: var(--ink-2); font-weight: 600; }
.formula-inline { font: 600 13px var(--mono); }
.conv-res .v .formula-inline { white-space: normal; }

/* ---------- first-visit guide ---------- */
.tool.is-onboarding { grid-template-columns: minmax(0, 1fr); }
.tool.is-onboarding > .editor, .tool.is-onboarding > .results { display: none; }
.ob-wrap:empty { display: none; }
.ob { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 16px; box-shadow: var(--shadow); padding: 22px 24px 24px; }
.ob-steps { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0 0 18px; padding: 0; font-size: 14px; color: var(--ink-3); }
.ob-steps li { display: flex; align-items: center; gap: 7px; }
.ob-steps li + li::before { content: ""; width: 22px; height: 1px; background: var(--line-2); margin-right: 4px; }
.ob-steps li.on { color: var(--ink); font-weight: 700; }
.ob-steps li.done { color: var(--ok); }
.stepno { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid currentColor; font: 700 11.5px/1 var(--sans); flex: none; }
.ob-steps li.on .stepno { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.ob-steps li.done .stepno { background: var(--ok); color: var(--paper); border-color: var(--ok); }
.ob-q { font: 700 26px/1.25 var(--serif); margin: 0 0 14px; }
.ob-chosen { margin: 0 0 6px; font-size: 14px; color: var(--ink-2); display: flex; align-items: center; gap: 8px; }
.ob-back { border: 0; background: none; color: var(--accent); font-weight: 600; cursor: pointer; padding: 2px 4px; }
.ob-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.ob-card { text-align: left; display: grid; align-content: start; gap: 6px; padding: 16px 16px 15px; border: 1.5px solid var(--line-2); border-radius: 12px; background: var(--paper); cursor: pointer; transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s; min-height: 132px; }
.ob-card:hover, .ob-card:focus-visible { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 10px 24px -16px rgba(39, 69, 143, 0.6); outline: none; }
.ob-card b { font: 700 20px/1.2 var(--serif); display: flex; align-items: center; gap: 8px; }
.ob-card b em { font: 700 11px/1 var(--sans); font-style: normal; color: var(--on-accent); background: var(--accent); padding: 4px 7px; border-radius: 999px; }
.ob-card .eg { font: 700 22px/1.2 var(--serif); color: var(--accent); font-variant-numeric: tabular-nums; }
.ob-card small { font-size: 13.5px; line-height: 1.5; color: var(--ink-2); }
.ob-card.is-default { border-color: var(--ink-3); }
.ob-way--paste { border-color: var(--accent); background: linear-gradient(var(--accent-2), var(--paper) 70%); }
.ob-copy { margin-top: 6px; }
.ob-copy svg { display: block; }
.pa-sheet { fill: var(--paper-2); stroke: var(--line-2); }
.pa-sel { fill: var(--accent-2); stroke: var(--accent); stroke-dasharray: 3 2; }
.pa-line { stroke: var(--ink-3); stroke-width: 2.4; stroke-linecap: round; }
.pa-arrow { fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.pa-box { fill: var(--paper-2); stroke: var(--ink); stroke-width: 1.5; }
.pa-num { font: 700 13px Georgia, serif; fill: var(--ink); }
.ob-demo { border-left: 1px dashed var(--line-2); padding-left: 22px; }
.ob-demo-t { font: 700 12px/1 var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--red); margin-bottom: 12px; }
.ob-demo .r-big { font-size: 52px; }
.ob-demo .r-row dd { font-size: 17px; }
.ob-demo .hint { margin-top: 8px; }
.ed-hint { display: flex; align-items: center; gap: 8px; margin: 0 0 10px; font-size: 14px; color: var(--ink-2); }
.tb-label { display: inline-flex; align-items: center; gap: 7px; }
.r-label { display: flex; align-items: center; gap: 7px; }
.ed-hint .stepno, .tb-label .stepno, .r-label .stepno { color: var(--accent); }
@media (max-width: 860px) {
  .ob { grid-template-columns: minmax(0, 1fr); padding: 18px 16px 18px; }
  .ob-demo { border-left: 0; border-top: 1px dashed var(--line-2); padding: 16px 0 0; }
  .ob-cards { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .ob-card { min-height: 0; padding: 13px 14px; }
  .ob-card .eg { font-size: 18px; }
  .ob-q { font-size: 22px; }
}
@media print { .ob-wrap { display: none; } .ed-hint { display: none; } }

/* algorithm step */
.ob-group { margin: 4px 0 8px; font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.ob-cards--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ob-cards--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 66%; }
.ob-cards--4 .ob-card { min-height: 112px; }
.ob-cards--2 .ob-card { min-height: 0; }
.ob-card--rec { border-color: var(--accent); background: linear-gradient(var(--accent-2), var(--paper) 70%); }
.ob-more { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 10px 0 14px; font-size: 13.5px; color: var(--ink-2); }
.ob-chip { border: 1px solid var(--line-2); background: var(--paper); border-radius: 999px; padding: 4px 12px; font-size: 13.5px; cursor: pointer; min-height: 32px; }
.ob-chip:hover, .ob-chip:focus-visible { border-color: var(--accent); color: var(--accent); outline: none; }
.r-pick { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 2px 0 12px; font-size: 13px; color: var(--ink-2); }
.r-pick-sel { flex: 1; max-width: 220px; min-height: 34px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--paper); padding: 4px 8px; font-weight: 600; color: var(--ink); }
.r-scales tr.is-head th, .r-scales tr.is-head td { color: var(--accent); }
.r-scales tr.is-head th::before { content: "▸ "; }
@media (max-width: 860px) {
  .ob-cards--4, .ob-cards--2 { grid-template-columns: minmax(0, 1fr); max-width: none; }
  .ob-cards--4 .ob-card { min-height: 0; }
}
@media print { .r-pick { display: none; } }