:root {
    --bg: #0b2624; --bg2: #051311; --card: rgba(255,255,255,.06); --line: rgba(255,255,255,.17);
    --ink: #eefcfa; --muted: #b7d9d4; --accent: #4fd8c8; --accent-ink: #04211e; --field: rgba(255,255,255,.08);
    --soft: rgba(79,216,200,.14); --good: #8ce99a; --good-bg: rgba(140,233,154,.12); --warn: #ffc078; --warn-bg: rgba(255,192,120,.14); --bad: #ffa8a8; --pay: #ffd43b; --pay-bg: rgba(255,212,59,.11);
    color-scheme: dark;
}
@media (prefers-color-scheme: light) {
    :root { --bg: #effaf8; --bg2: #d6eeea; --card: #fff; --line: #c3e0db; --ink: #072421; --muted: #3f615c;
            --accent: #0b7a70; --accent-ink: #fff; --field: #f8fdfc; --soft: #dcf3ef; --good: #2b8a3e; --good-bg: #e6f6e9; --warn: #b45309; --warn-bg: #fff1dc; --bad: #c92a2a; --pay: #8a5a00; --pay-bg: #fff6d6; color-scheme: light; }
}
:root[data-theme="light"] { --bg: #effaf8; --bg2: #d6eeea; --card: #fff; --line: #c3e0db; --ink: #072421; --muted: #3f615c;
            --accent: #0b7a70; --accent-ink: #fff; --field: #f8fdfc; --soft: #dcf3ef; --good: #2b8a3e; --good-bg: #e6f6e9; --warn: #b45309; --warn-bg: #fff1dc; --bad: #c92a2a; --pay: #8a5a00; --pay-bg: #fff6d6; color-scheme: light; }
:root[data-theme="dark"] {
    --bg: #0b2624; --bg2: #051311; --card: rgba(255,255,255,.06); --line: rgba(255,255,255,.17);
    --ink: #eefcfa; --muted: #b7d9d4; --accent: #4fd8c8; --accent-ink: #04211e; --field: rgba(255,255,255,.08);
    --soft: rgba(79,216,200,.14); --good: #8ce99a; --good-bg: rgba(140,233,154,.12); --warn: #ffc078; --warn-bg: rgba(255,192,120,.14); --bad: #ffa8a8; --pay: #ffd43b; --pay-bg: rgba(255,212,59,.11);
    color-scheme: dark;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; padding: clamp(1rem,4vw,2.5rem) 1rem 4rem; display: flex; justify-content: center;
       font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--ink);
       background: var(--bg2) linear-gradient(180deg, var(--bg), var(--bg2) 900px) no-repeat; touch-action: manipulation; }
.app { width: min(560px, 100%); min-width: 0; display: flex; flex-direction: column; }
.col-main, .col-side { display: contents; }
.app > .topbar, .app > .back { order: 0; }
.app > header, .warn-box { order: 1; }
.summary { order: 2; }
.log { order: 3; }
.mine { order: 4; }
.list { order: 5; }
.ahead { order: 6; }
.setup { order: 7; }
.fill { order: 8; }
.settings { order: 9; }
.app > .faq { order: 10; }
.app > footer { order: 11; }
.setup-first .setup { order: 2; }
.setup-first .setup { border: 2px solid var(--accent); }
header { text-align: center; margin-bottom: 1.1rem; }
h1 { margin: 0; font-size: 1.7rem; line-height: 1.2; letter-spacing: -.02em; overflow-wrap: anywhere; }
.sub { margin: .4rem 0 0; color: var(--muted); font-size: 1rem; }
h2 { margin: 0 0 .7rem; font-size: 1.15rem; overflow-wrap: anywhere; }
.sub-h { margin: 1.1rem 0 .5rem; font-size: 1rem; overflow-wrap: anywhere; }
.setup .sub-h:first-of-type { margin-top: .2rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 1.1rem; margin-bottom: .9rem; min-width: 0; }
label, legend, .label-like { display: block; margin: .9rem 0 .35rem; font-size: .9rem; font-weight: 600; color: var(--muted); padding: 0; }
input[type=text], input[type=date], select { display: block; width: 100%; min-width: 0; max-width: 100%; min-height: 48px; padding: .6rem .8rem; font: inherit; font-size: 1.05rem; color: var(--ink);
       background: var(--field); border: 1px solid var(--line); border-radius: 12px; -webkit-appearance: none; appearance: none; }
select { -webkit-appearance: auto; appearance: auto; }
input[type=date] { -webkit-appearance: auto; appearance: auto; }
input[aria-invalid="true"], select[aria-invalid="true"] { border-color: var(--bad); }
select option { color: #111; background: #fff; }
input:focus-visible, button:focus-visible, select:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
::placeholder { color: var(--muted); opacity: .75; }
.hint { margin: .45rem 0 0; color: var(--muted); font-size: .88rem; overflow-wrap: anywhere; }
.hint:empty { display: none; }
.hint.top { margin: -.3rem 0 0; }
[hidden] { display: none !important; }
.warn-box { margin: 0 0 .9rem; padding: .7rem .9rem; border-radius: 12px; background: var(--warn-bg); border-left: 5px solid var(--warn); font-weight: 600; }
input.short { width: 6rem; text-align: center; }

/* buttons */
.primary, .secondary, .danger { display: flex; align-items: center; justify-content: center; width: 100%; min-height: 48px; padding: .5rem .8rem; border-radius: 12px;
       font: inherit; font-weight: 700; text-align: center; text-decoration: none; cursor: pointer; line-height: 1.2; overflow-wrap: anywhere; }
.primary { border: 0; background: var(--accent); color: var(--accent-ink); }
.secondary { border: 1px solid var(--line); background: var(--field); color: var(--ink); font-weight: 600; }
.secondary.small { width: auto; min-height: 44px; padding: 0 .85rem; font-size: .92rem; margin: 0; }
.secondary[aria-disabled="true"] { opacity: .55; }
.danger { border: 1px solid var(--bad); background: transparent; color: var(--bad); font-weight: 600; margin-top: .9rem; }
button:disabled { opacity: .45; cursor: default; }
.link { display: block; min-height: 44px; margin-top: .3rem; padding: 0 .1rem; border: 0; background: none; color: var(--accent); font: inherit; font-size: .95rem; font-weight: 600; text-align: left; cursor: pointer; }
.err { margin: .4rem 0 0; color: var(--bad); font-weight: 600; font-size: .92rem; overflow-wrap: anywhere; }
.err:empty { margin: 0; }
.msg { margin: 0; color: var(--muted); font-size: .95rem; overflow-wrap: anywhere; }
.msg.show { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .8rem; margin: .8rem 0 0; padding: .5rem .75rem; border-radius: 12px; background: var(--soft); color: var(--ink); }
.msg .undo { min-height: 40px; padding: 0 .9rem; border: 1px solid var(--accent); border-radius: 10px; background: none; color: var(--accent); font: inherit; font-weight: 700; cursor: pointer; }
.row-btns { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .8rem; }
.row-btns > * { flex: 1 1 9rem; width: auto; }
.row-btns > .small { flex: 0 0 auto; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: .5rem; margin-top: .4rem; }
.tool-grid.gap { margin-top: 1rem; }
a.secondary { min-width: 0; }
.gap-top { margin-top: 1rem; }
.pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: .5rem; }
.pair > * { min-width: 0; }
.opt, .fld { min-width: 0; }
.inline { display: flex; align-items: center; gap: .6rem; min-width: 0; flex-wrap: wrap; }
.inline > input { width: 4.5rem; flex: none; text-align: center; }
.quick { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip { min-width: 44px; min-height: 44px; padding: 0 .75rem; border: 1px solid var(--line); border-radius: 999px; background: var(--field); color: var(--accent); font: inherit; font-size: .95rem; font-weight: 700; cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

/* the answer */
.summary { border: 2px solid var(--accent); }
.month-nav, .day-nav { display: grid; grid-template-columns: 48px minmax(0, 1fr) 48px; gap: .5rem; align-items: center; }
.month-nav .small, .day-nav .small { width: 48px; min-height: 48px; padding: 0; font-size: 1.4rem; }
.m-name { margin: 0; text-align: center; font-weight: 800; font-size: 1.1rem; }
.to-now { margin: .1rem auto 0; text-align: center; }
#sum-body { margin-top: .7rem; }
.next { margin: 0; font-size: 1.3rem; font-weight: 800; line-height: 1.3; overflow-wrap: anywhere; color: var(--accent); }
.next.small-next { font-size: 1.12rem; }
.next.good { color: var(--good); } .next.pay { color: var(--pay); }
.facts-line { margin: .3rem 0 0; color: var(--muted); font-weight: 600; overflow-wrap: anywhere; }
.verdict { margin: .7rem 0 0; padding: .6rem .8rem; border-radius: 12px; font-weight: 700; overflow-wrap: anywhere; }
.verdict.good { background: var(--good-bg); border-left: 5px solid var(--good); }
.verdict.pay { background: var(--pay-bg); border-left: 5px solid var(--pay); }
.options { list-style: none; margin: .7rem 0 0; padding: 0; display: grid; gap: .35rem; }
.opt-line { padding: .45rem .7rem; border: 1px solid var(--line); border-radius: 10px; font-size: .95rem; overflow-wrap: anywhere; }
.opt-line.base { font-weight: 700; }
.opt-line.best { border: 2px solid var(--good); font-weight: 700; }
.opt-line.best::before { content: "Cheapest: "; color: var(--good); }
.spent { margin: .7rem 0 0; font-weight: 600; overflow-wrap: anywhere; }
.go { margin-top: .8rem; }

/* log a ride */
.log-btns { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: .5rem; margin-top: .9rem; }
.log-btns .primary { flex-direction: column; min-height: 64px; font-size: 1.08rem; }
.log-btns small { display: block; font-weight: 600; font-size: .82rem; opacity: .85; }
.fare-line { margin: .5rem 0 0; font-weight: 700; overflow-wrap: anywhere; }
#l-day { font-weight: 600; }

/* boxes: each fare, pass, bought pass and day in its own bordered box */
.boxes, .days { list-style: none; margin: .4rem 0 0; padding: 0; display: grid; gap: .6rem; }
.box { border: 1px solid var(--line); border-left: 5px solid var(--accent); border-radius: 12px; padding: .75rem .85rem; background: var(--field); min-width: 0; }
.box .pair label, .box .fld > label { margin-top: .5rem; }
.box .pair:first-child label { margin-top: 0; }
.box-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: .2rem .8rem; }
.box-head strong { overflow-wrap: anywhere; min-width: 0; }
.tag { font-size: .8rem; font-weight: 700; padding: .1rem .55rem; border-radius: 999px; background: var(--soft); color: var(--ink); }
.small-line { margin: .3rem 0 0; font-size: .93rem; overflow-wrap: anywhere; }
.pass-verdict { margin: .4rem 0 0; font-weight: 700; font-size: .95rem; overflow-wrap: anywhere; }
.pass-verdict.good { color: var(--good); } .pass-verdict.pay { color: var(--pay); }
.box.buy.good { border-left-color: var(--good); } .box.buy.pay { border-left-color: var(--pay); }
.box.bought.st-done { border-left-color: var(--muted); }
.day-total { color: var(--muted); font-weight: 700; font-size: .92rem; }
.ride { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .45rem .8rem; margin-top: .5rem; padding-top: .5rem; border-top: 1px dashed var(--line); }
.ride-info { flex: 1 1 12rem; min-width: 0; }
.ride.edit { display: block; }
.ride-text { margin: 0; overflow-wrap: anywhere; }
.on-pass { margin: .15rem 0 0; font-size: .85rem; font-weight: 700; color: var(--good); }
.ride-btns { display: flex; flex-wrap: wrap; gap: .4rem; }
.ride-btns .small { min-width: 48px; }
.buy-btn { margin-top: .8rem; }
.buy-form { margin-top: .3rem; }
.covers .label-like { margin-top: .7rem; }
.check { display: flex; align-items: center; gap: .55rem; margin: .3rem 0 0; min-height: 44px; padding: .2rem .7rem; border: 1px solid var(--line); border-radius: 12px; color: var(--ink); font-weight: 600; cursor: pointer; overflow-wrap: anywhere; }
.check input { width: 1.15rem; height: 1.15rem; margin: 0; flex: none; accent-color: var(--accent); }

/* usual travel */
.wd { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: .3rem; }
.wd-day { display: flex; flex-direction: column; align-items: center; gap: .2rem; margin: 0; padding: .35rem 0; min-height: 56px; border: 1px solid var(--line); border-radius: 10px; background: var(--field); color: var(--ink); font-size: .85rem; cursor: pointer; min-width: 0; }
.wd-day:has(input:checked) { border-color: var(--accent); background: var(--soft); }
.wd-day input { width: 1.15rem; height: 1.15rem; margin: 0; accent-color: var(--accent); }
.recent { margin: .8rem 0 0; color: var(--muted); font-weight: 600; font-size: .92rem; }
.recent:empty { display: none; }
#ahead-body .sub-h { margin-top: 1rem; }

@media print {
    body { background: #fff; color: #000; padding: 0; display: block; }
    .app { width: 100%; display: block; }
    .back, .topbar, header .sub, .log, .mine, .ahead, .setup, .fill, .settings, .faq, footer, .msg, .month-nav button, .to-now, .ride-btns, .go { display: none !important; }
    .card { border-color: #999; background: #fff; break-inside: avoid; }
    .next, .verdict, .opt-line, .facts-line, .box { color: #000; background: #fff; }
}

/* questions */
.faq { margin-top: 1.2rem; }
.faq details { border: 1px solid var(--line); border-radius: 12px; margin: 0 0 .5rem; background: var(--card); }
.faq summary { cursor: pointer; padding: .75rem .9rem; font-weight: 600; min-height: 44px; }
.faq details p { margin: 0; padding: 0 .9rem .8rem; color: var(--muted); }
footer { margin-top: 1.4rem; text-align: center; font-size: .9rem; }
footer a { color: var(--muted); }

.back { display: inline-flex; align-items: center; gap: .4rem; min-height: 44px; margin: 0 0 .5rem; padding: 0 1rem 0 .8rem; border: 1px solid var(--line, rgba(127,127,127,.4)); border-radius: 999px; color: var(--muted, var(--mut, inherit)); font-size: .92rem; font-weight: 600; text-decoration: none; background: transparent; }
.back:hover { color: var(--ink, inherit); border-color: currentColor; }
.back:focus-visible { outline: 3px solid var(--accent, var(--acc, #fff)); outline-offset: 2px; }

/* narrow phones */
@media (max-width: 420px) {
    .card { padding: 1rem .8rem; }
    .tool-grid { grid-template-columns: minmax(0, 1fr); }
    h1 { font-size: 1.5rem; }
    .pair { grid-template-columns: minmax(0, 1fr); }
    .box { padding: .7rem .7rem; }
}
@media (max-width: 360px) {
    .topbar .theme-toggle { padding: 0; width: 44px; justify-content: center; }
    .topbar .theme-toggle span { display: none; }
    .wd-day { font-size: .78rem; }
    .log-btns .primary { font-size: 1rem; }
}

/* laptops and desktops: the answer, logging and rides on the left; planning and set-up on the right */
@media (min-width: 900px) {
    .app { width: min(1140px, 100%); display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); column-gap: 1.5rem; align-items: start; }
    .app > * { grid-column: 1 / -1; }
    .col-main, .col-side { display: flex; flex-direction: column; min-width: 0; }
    .app > .topbar { grid-row: 1; }
    .app > header { grid-row: 2; }
    .app > .warn-box { grid-row: 3; }
    .app > .col-main { grid-column: 1; grid-row: 4; }
    .app > .col-side { grid-column: 2; grid-row: 4; }
    .app > .faq { grid-row: 5; width: min(760px, 100%); justify-self: center; }
    .app > footer { grid-row: 6; width: min(760px, 100%); justify-self: center; }
    header h1 { font-size: 2.3rem; }
    .next { font-size: 1.5rem; }
    .pair { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}