/* Section 7 — "Ton plan": study-plan calculator + grade calculator. Everything scoped under #plan, classes .plan-* */

#plan {
  /* the five theme swatches of the timeline, built only from base.css tokens */
  --plan-c1: var(--wine); --plan-c2: var(--wine-deep); --plan-c3: var(--brass); --plan-c4: var(--muted);
  --plan-c5: repeating-linear-gradient(135deg, var(--brass) 0 3px, var(--brass-deco) 3px 6px);
}
#plan .container { position: relative; z-index: 1; }

/* ---------------------------------------------------------------- head */
#plan .plan-head { max-width: 46em; margin: 0 0 clamp(40px, 6vw, 72px); }
#plan .plan-head .lead { max-width: 34em; }

/* ---------------------------------------------------------------- grid + cards */
#plan .plan-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: clamp(20px, 3vw, 32px); align-items: start; }
@media (min-width: 1020px) { #plan .plan-grid { grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr); } }

#plan .plan-card { position: relative; padding: clamp(22px, 3.6vw, 48px); border-radius: var(--r-xl); }
/* menu-card double frame: a brass hairline inset inside the card */
#plan .plan-card::before { content: ""; position: absolute; inset: 9px; border: 1px solid var(--brass-deco); border-radius: calc(var(--r-xl) - 9px); opacity: .38; pointer-events: none; }
@media (max-width: 420px) { #plan .plan-card { border-radius: var(--r-lg); } #plan .plan-card::before { inset: 7px; border-radius: calc(var(--r-lg) - 7px); } }

#plan .plan-card-head { display: flex; align-items: baseline; gap: 14px; margin: 0 0 clamp(22px, 3vw, 34px); padding-bottom: 18px; border-bottom: 1px solid var(--line); }
#plan .plan-card-head .h3 { margin: 0; }
#plan .plan-k { font-style: italic; font-size: 17px; color: var(--brass); letter-spacing: .02em; display: inline-flex; align-items: center; gap: 10px; }
#plan .plan-k::after { content: ""; width: 18px; height: 1px; background: var(--brass-deco); }

/* ---------------------------------------------------------------- fields */
#plan .plan-form { display: grid; gap: clamp(22px, 3vw, 30px); }
#plan .plan-field { margin: 0; padding: 0; border: 0; min-width: 0; }
#plan .plan-label { display: block; padding: 0; font-size: 13px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin: 0 0 10px; }
#plan .plan-opt { text-transform: none; letter-spacing: 0; font-weight: 500; }
#plan .plan-hint { margin: 10px 0 0; font-size: 14.5px; line-height: 1.5; color: var(--muted); }

#plan .plan-min-top { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
#plan .plan-min-top .plan-label { margin-bottom: 14px; }
#plan .plan-min-val { display: flex; align-items: center; gap: 14px; }
#plan .plan-big { font-size: clamp(64px, 9vw, 96px); line-height: .86; letter-spacing: -.045em; font-weight: 350; color: var(--ink); display: inline-flex; align-items: baseline; gap: 6px; }
#plan .plan-big small { font-size: 17px; letter-spacing: 0; font-style: italic; color: var(--muted); font-weight: 400; }
#plan .plan-big > span { display: inline-block; min-width: 1.15em; text-align: right; }
#plan .plan-bump { animation: plan-bump .42s var(--ease-out); }
@keyframes plan-bump { from { transform: translateY(.12em); opacity: .35; } to { transform: none; opacity: 1; } }

/* little minute clock next to the big number */
#plan .plan-clock { width: 60px; height: 60px; flex: none; }
#plan .plan-clock-ticks line { stroke: var(--brass-deco); stroke-width: 1.2; stroke-linecap: round; }
#plan .plan-clock-track { fill: none; stroke: var(--line); stroke-width: 3; }
#plan .plan-clock-arc { fill: none; stroke: var(--wine); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 100 100; transition: stroke-dashoffset .6s var(--ease-out); }
#plan .plan-clock-pin { fill: var(--brass-deco); }

/* ---------------------------------------------------------------- range slider (brass rail, ring thumb) */
#plan .plan-range { -webkit-appearance: none; appearance: none; display: block; width: 100%; height: 44px; margin: 0; background: transparent; cursor: pointer; touch-action: pan-y; }
#plan .plan-range:focus { outline: none; }
#plan .plan-range:focus-visible { outline: 3px solid var(--wine); outline-offset: 2px; border-radius: 999px; }
#plan .plan-range::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--wine) 0, var(--wine) var(--p, 50%), var(--muted) var(--p, 50%), var(--muted) 100%); }
#plan .plan-range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 30px; height: 30px; margin-top: -13px; border-radius: 50%; border: 2px solid var(--wine); background: radial-gradient(circle, var(--wine) 0 4px, var(--card) 4.6px); box-shadow: 0 0 0 6px rgba(201, 164, 92, .16), 0 4px 12px rgba(60, 30, 20, .18); transition: transform .3s var(--ease-out), box-shadow .3s; }
#plan .plan-range:active::-webkit-slider-thumb { transform: scale(1.12); box-shadow: 0 0 0 9px rgba(201, 164, 92, .2), 0 6px 16px rgba(60, 30, 20, .2); }
#plan .plan-range::-moz-range-track { height: 4px; border-radius: 4px; background: var(--muted); border: 0; }
#plan .plan-range::-moz-range-progress { height: 4px; border-radius: 4px; background: var(--wine); }
#plan .plan-range::-moz-range-thumb { width: 27px; height: 27px; border-radius: 50%; border: 2px solid var(--wine); background: radial-gradient(circle, var(--wine) 0 4px, var(--card) 4.6px); box-shadow: 0 0 0 6px rgba(201, 164, 92, .16), 0 4px 12px rgba(60, 30, 20, .18); }

#plan .plan-scale { display: flex; justify-content: space-between; padding: 0 6px; font-family: var(--serif); font-size: 14px; color: var(--muted); font-variant-numeric: lining-nums tabular-nums; }
#plan .plan-scale span { position: relative; width: 2ch; text-align: center; }
#plan .plan-scale span::before { content: ""; position: absolute; left: 50%; top: -6px; width: 1px; height: 4px; background: var(--line-strong); }

/* ---------------------------------------------------------------- day chips (real radios) */
#plan .plan-chips { display: flex; gap: 10px; flex-wrap: wrap; }
#plan .plan-chip { position: relative; flex: 1 1 0; min-width: 84px; }
#plan .plan-chip input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
#plan .plan-chip span { display: flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--card); font-weight: 650; font-size: 15.5px; color: var(--ink); transition: background-color .25s, color .25s, border-color .25s, box-shadow .25s; }
#plan .plan-chip:hover span { border-color: var(--ink); }
#plan .plan-chip input:checked + span { background: var(--wine); border-color: var(--wine); color: #fff; box-shadow: 0 8px 20px rgba(138, 28, 53, .22); }
#plan .plan-chip input:focus-visible + span { outline: 3px solid var(--wine); outline-offset: 3px; }

/* ---------------------------------------------------------------- date */
#plan .plan-date-row { display: flex; gap: 10px; align-items: stretch; }
#plan .plan-date-in { flex: 1 1 auto; min-width: 0; min-height: 50px; padding: 0 16px; border-radius: var(--r-sm); border: 1px solid var(--muted); background: var(--card); color: var(--ink); font-size: 16px; font-family: var(--sans); }
#plan .plan-date-in:hover { border-color: var(--ink); }
#plan .plan-date-in:focus-visible { outline: 3px solid var(--wine); outline-offset: 2px; border-color: var(--wine); }
#plan .plan-clear { flex: none; min-height: 50px; padding: 0 18px; border-radius: var(--r-sm); border: 1px solid var(--muted); background: transparent; font-weight: 600; font-size: 15px; color: var(--ink); }
#plan .plan-clear:hover { background: var(--paper-2); }
#plan .plan-clear[hidden] { display: none; }

/* ---------------------------------------------------------------- result */
#plan .plan-out { margin-top: clamp(28px, 4vw, 40px); padding-top: clamp(24px, 3.4vw, 34px); border-top: 1px solid var(--line); position: relative; }
#plan .plan-out::before { content: ""; position: absolute; top: -4px; left: 50%; width: 7px; height: 7px; margin-left: -3.5px; background: var(--card); border: 1px solid var(--brass-deco); transform: rotate(45deg); }
#plan .plan-ready { margin: 0; font-family: var(--serif); font-size: clamp(24px, 2.6vw, 30px); line-height: 1.05; letter-spacing: -.02em; color: var(--muted); font-style: italic; }
#plan .plan-ready b { display: block; margin-top: 6px; font-style: normal; font-weight: 400; font-size: clamp(46px, 6.4vw, 72px); line-height: .95; letter-spacing: -.04em; color: var(--wine); font-variant-numeric: lining-nums; }
#plan .plan-when { margin: 14px 0 0; color: var(--ink); max-width: 36em; }

#plan .plan-fit { display: flex; gap: 12px; align-items: flex-start; margin: 18px 0 0; padding: 14px 16px; border-radius: var(--r-sm); background: var(--ok-soft); color: var(--ink); }
#plan .plan-fit[hidden] { display: none; }
#plan .plan-fit p { margin: 0; line-height: 1.5; }
#plan .plan-fit-i { flex: none; width: 22px; height: 22px; margin-top: 1px; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
#plan .plan-fit-ok { stroke: var(--ok); }
#plan .plan-fit-ko { stroke: var(--bad); display: none; }
#plan .plan-fit.is-short { background: var(--bad-soft); }
#plan .plan-fit.is-short .plan-fit-ok { display: none; }
#plan .plan-fit.is-short .plan-fit-ko { display: block; }
#plan .plan-apply { display: inline-flex; align-items: center; min-height: 44px; margin: 4px 0 -6px; padding: 0 2px; border: 0; background: none; color: var(--wine); font-weight: 700; text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
#plan .plan-apply:hover { text-decoration-thickness: 2px; }
#plan .plan-apply[hidden] { display: none; }

/* ---------------------------------------------------------------- timeline (signature) */
#plan .plan-tl { position: relative; margin: clamp(30px, 4vw, 40px) 0 0; padding: 62px 0 0; overflow: hidden; }
#plan .plan-weeks { position: absolute; left: 0; right: 0; top: 48px; bottom: 44px; display: grid; grid-template-columns: repeat(var(--plan-a, 6), minmax(0, 1fr)); }
#plan .plan-wk { position: relative; border-left: 1px solid var(--line); }
#plan .plan-wk:nth-child(even) { background: rgba(239, 230, 217, .38); }
#plan .plan-wk:last-child { border-right: 1px solid var(--line); }
#plan .plan-wk span { position: absolute; left: 0; right: 0; bottom: -22px; line-height: 18px; text-align: center; font-family: var(--serif); font-size: 13.5px; color: var(--muted); font-variant-numeric: lining-nums tabular-nums; }
@media (max-width: 600px) { #plan .plan-weeks.is-dense .plan-wk:nth-child(even) span { visibility: hidden; } }

#plan .plan-track { position: relative; height: 18px; margin: 10px 0 0; }
#plan .plan-run { position: absolute; inset: 0; display: flex; gap: 0; border-radius: 3px; overflow: hidden; transform-origin: 0 50%; transform: scaleX(1); transition: transform .9s var(--ease-out); box-shadow: 0 6px 16px rgba(60, 30, 20, .14); }
#plan .plan-seg { display: block; flex-basis: 0; height: 100%; box-shadow: inset -1px 0 0 rgba(255, 255, 255, .55); }
#plan .plan-s1 { background: var(--plan-c1); }
#plan .plan-s2 { background: var(--plan-c2); }
#plan .plan-s3 { background: var(--plan-c3); }
#plan .plan-s4 { background: var(--plan-c4); }
#plan .plan-s5 { background: var(--plan-c5); }
#plan .plan-sx { background: var(--ink) repeating-linear-gradient(90deg, transparent 0 5px, rgba(201, 164, 92, .55) 5px 6px); }
#plan .plan-sr { background: var(--brass-deco); }

/* margin between "ready" and the exam date */
#plan .plan-gap { position: absolute; left: 0; top: 3px; bottom: 3px; width: 100%; background: var(--ok); opacity: 0; border-radius: 2px; transform-origin: 0 50%; transform: translateX(0) scaleX(0); transition: transform .9s var(--ease-out), opacity .4s; }
#plan .plan-gap.is-on { opacity: .28; }

/* markers (finish + exam). The element spans the track and is moved by translateX(% of the track). */
#plan .plan-mk { position: absolute; left: 0; top: -40px; bottom: -8px; width: 100%; pointer-events: none; transform: translateX(var(--x, 100%)); transition: transform .9s var(--ease-out); }
#plan .plan-mk::before { content: ""; position: absolute; left: -.5px; top: 22px; bottom: 0; width: 1px; background: var(--ink); }
#plan .plan-mk::after { content: ""; position: absolute; left: -4px; top: 18px; width: 7px; height: 7px; background: var(--card); border: 1px solid var(--ink); transform: rotate(45deg); }
#plan .plan-mk b { position: absolute; left: 0; top: 0; transform: translateX(-50%); white-space: nowrap; font-family: var(--serif); font-style: italic; font-weight: 500; font-size: 15px; line-height: 1; color: var(--ink); }
#plan .plan-mk.is-left b { transform: translateX(-100%); padding-right: 2px; }
#plan .plan-mk.is-right b { transform: none; padding-left: 2px; }
#plan .plan-mk-exam { top: -58px; }
#plan .plan-mk-exam::before { background: var(--wine); width: 2px; left: -1px; top: 18px; }
#plan .plan-mk-exam::after { border-color: var(--wine); background: var(--wine); top: 14px; }
#plan .plan-mk-exam b { color: var(--wine); font-style: normal; font-family: var(--sans); font-size: 12.5px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
#plan .plan-mk[hidden] { display: none; }

#plan .plan-axis { display: flex; justify-content: space-between; margin-top: 26px; line-height: 18px; font-size: 12.5px; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

/* legend = the readable version of the timeline */
#plan .plan-legend { list-style: none; margin: clamp(22px, 3vw, 30px) 0 0; padding: 0; border-top: 1px solid var(--line); }
#plan .plan-legend li { display: grid; grid-template-columns: 12px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 11px 0; border-bottom: 1px solid var(--line); }
#plan .plan-sw { width: 12px; height: 12px; border-radius: 3px; }
#plan .plan-lg-n { font-weight: 600; font-size: 15.5px; line-height: 1.35; }
#plan .plan-lg-n small { display: block; font-weight: 400; font-size: 14px; color: var(--muted); }
#plan .plan-lg-w { font-family: var(--serif); font-style: italic; font-size: 15px; color: var(--brass); white-space: nowrap; text-align: right; }

#plan .plan-note-s { margin: 18px 0 0; font-size: 14px; line-height: 1.55; color: var(--muted); }
#plan .plan-note-s b { color: var(--ink); }

/* ---------------------------------------------------------------- grade card */
#plan .plan-sub { margin: 0 0 8px; color: var(--muted); font-size: 16px; line-height: 1.55; }
#plan .plan-dial-wrap { position: relative; max-width: 360px; margin: 10px auto 0; }
#plan .plan-dial { width: 100%; height: auto; overflow: visible; }
#plan .plan-dial-frame { fill: none; stroke: var(--brass-deco); stroke-width: 1; opacity: .7; }
#plan .plan-dial-track { fill: none; stroke: var(--linen); stroke-width: 10; stroke-linecap: round; }
#plan .plan-dial-fill { fill: none; stroke: var(--ok); stroke-width: 10; stroke-linecap: round; stroke-dasharray: 100 100; transition: stroke-dashoffset .8s var(--ease-out), stroke .4s; }
#plan .plan-grade.is-fail .plan-dial-fill { stroke: var(--wine); }
#plan .plan-tick { stroke: var(--line-strong); stroke-width: 1.2; stroke-linecap: round; }
#plan .plan-tick.is-int { stroke: var(--brass-deco); stroke-width: 1.6; }
#plan .plan-tick.is-pass { stroke: var(--ink); stroke-width: 2; }
#plan .plan-tick-l { font-family: var(--serif); font-size: 15px; fill: var(--muted); text-anchor: middle; dominant-baseline: middle; }
#plan .plan-tick-l.is-pass { fill: var(--ink); font-weight: 600; }
#plan .plan-dial-bead { transform-box: view-box; transform-origin: 160px 164px; transition: transform .8s var(--ease-out); }
#plan .plan-dial-bead circle { fill: var(--card); stroke: var(--ink); stroke-width: 1.5; filter: drop-shadow(0 2px 3px rgba(60, 30, 20, .25)); }
#plan .plan-dial-read { position: absolute; left: 0; right: 0; bottom: 0; display: flex; flex-direction: column; align-items: center; }
#plan .plan-grade-num { font-size: clamp(66px, 9vw, 92px); line-height: .9; letter-spacing: -.045em; font-weight: 400; color: var(--ink); }
#plan .plan-grade-of { margin-top: 4px; font-family: var(--serif); font-style: italic; color: var(--muted); font-size: 15px; }

#plan .plan-verdict { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 6px 10px; margin: 20px 0 clamp(22px, 3vw, 30px); text-align: center; line-height: 1.45; }
#plan .plan-verdict b { font-family: var(--serif); font-size: 22px; font-weight: 500; letter-spacing: -.01em; color: var(--ok); }
#plan .plan-verdict span { flex-basis: 100%; color: var(--muted); font-size: 15px; }
#plan .plan-v-i { width: 22px; height: 22px; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; stroke: var(--ok); }
#plan .plan-v-ko { display: none; stroke: var(--wine); }
#plan .plan-verdict.is-fail b { color: var(--wine); }
#plan .plan-verdict.is-fail .plan-v-ok { display: none; }
#plan .plan-verdict.is-fail .plan-v-ko { display: block; }

#plan .plan-r-val { font-size: 30px; line-height: 1; color: var(--muted); margin-bottom: 12px; letter-spacing: -.02em; }
#plan .plan-r-val b { font-weight: 400; font-size: 44px; color: var(--ink); letter-spacing: -.04em; }

/* 30 marks, one per question */
#plan .plan-pips { display: grid; grid-template-columns: repeat(30, minmax(0, 1fr)); gap: 3px; margin: 14px 4px 0; height: 16px; }
#plan .plan-pips i { position: relative; display: block; border-radius: 2px; background: var(--line); transform-origin: 50% 100%; transform: scaleY(.55); transition: background-color .3s, transform .4s var(--ease-out); }
#plan .plan-pips i.is-on { background: var(--ok); transform: none; }
#plan .plan-grade.is-fail .plan-pips i.is-on { background: var(--wine); }
#plan .plan-pips i.is-need::after { content: ""; position: absolute; left: 50%; top: -9px; width: 5px; height: 5px; margin-left: -2.5px; background: var(--ink); transform: rotate(45deg); border-radius: 1px; }
#plan .plan-pips i.is-need:not(.is-on)::after { top: -11px; }

@media (min-width: 1020px) { #plan .plan-grade { position: sticky; top: 100px; } }

@media (prefers-reduced-motion: reduce) {
  #plan .plan-bump { animation: none; }
}