/* Paxta University — one hairline, one ink, nothing else. */

:root {
    color-scheme: light;
    --paper:    #fbfbfa;
    --card:     #ffffff;
    --ink:      #14140f;
    --muted:    #79796f;
    --hair:     #e2e2dc;
    --accent:   #14140f;
    --on-accent:#fbfbfa;
    --bad:      #a32b1c;
    --good:     #2f6b3f;
    --space:    clamp(1.5rem, 4vw, 3rem);
}

/* Dark palette: follows the system unless the reader pinned light,
   and is forced when they pinned dark. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
        --paper:    #0e0e0c;
        --card:     #141412;
        --ink:      #ecece6;
        --muted:    #8a8a80;
        --hair:     #26261f;
        --accent:   #ecece6;
        --on-accent:#0e0e0c;
        --bad:      #e0705f;
        --good:     #7fb98f;
    }
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --paper:    #0e0e0c;
    --card:     #141412;
    --ink:      #ecece6;
    --muted:    #8a8a80;
    --hair:     #26261f;
    --accent:   #ecece6;
    --on-accent:#0e0e0c;
    --bad:      #e0705f;
    --good:     #7fb98f;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 15px/1.6 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-feature-settings: "tnum" 1;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------------------------------------------------------------- chrome -- */

.top {
    border-bottom: 1px solid var(--hair);
    padding: 1.4rem var(--space) 0;
}

.top-in, .wrap {
    max-width: 1040px;
    margin: 0 auto;
}

.brand {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.wordmark {
    font-size: .95rem;
    font-weight: 600;
    letter-spacing: .34em;
    text-transform: uppercase;
}
.wordmark span { font-weight: 300; color: var(--muted); }

.whoami {
    font-size: .78rem;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: .9rem;
}

nav {
    display: flex;
    gap: 1.6rem;
    margin-top: 1.5rem;
    overflow-x: auto;
    scrollbar-width: none;
}
nav::-webkit-scrollbar { display: none; }

nav a {
    font-size: .8rem;
    letter-spacing: .06em;
    color: var(--muted);
    padding-bottom: .85rem;
    border-bottom: 1px solid transparent;
    white-space: nowrap;
}
nav a:hover { color: var(--ink); text-decoration: none; }
nav a.on { color: var(--ink); border-bottom-color: var(--ink); }

main { padding: var(--space); }

h1 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 400;
    letter-spacing: -.02em;
    margin: 0 0 .3rem;
}

.lede { color: var(--muted); font-size: .875rem; margin: 0 0 2.5rem; }

h2 {
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 3rem 0 1rem;
    padding-bottom: .6rem;
    border-bottom: 1px solid var(--hair);
}
h2:first-of-type { margin-top: 0; }

.muted { color: var(--muted); }
.empty { color: var(--muted); font-size: .875rem; padding: 1.2rem 0; }

/* ----------------------------------------------------------------- stats -- */

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1px;
    background: var(--hair);
    border: 1px solid var(--hair);
}

.stat { background: var(--paper); padding: 1.3rem 1.4rem; }
.stat .k {
    font-size: .65rem;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
}
.stat .v {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: -.03em;
    margin-top: .35rem;
    font-variant-numeric: tabular-nums;
}
.stat .v small { font-size: .9rem; color: var(--muted); letter-spacing: 0; }

/* ---------------------------------------------------------------- tables -- */

.scroll { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: .875rem; }

th {
    text-align: left;
    font-size: .65rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0 1rem .7rem 0;
    border-bottom: 1px solid var(--hair);
    white-space: nowrap;
}

td {
    padding: .85rem 1rem .85rem 0;
    border-bottom: 1px solid var(--hair);
    vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
td:last-child, th:last-child { padding-right: 0; }

td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.tight { white-space: nowrap; }

.mono {
    font-family: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
    font-size: .82em;
    letter-spacing: .02em;
}

.grade { font-variant-numeric: tabular-nums; }
.grade b { font-weight: 500; }
.grade .mark {
    display: inline-block;
    min-width: 1.4em;
    margin-left: .5rem;
    color: var(--muted);
    font-size: .8em;
}

/* ----------------------------------------------------------------- forms -- */

form.row {
    display: flex;
    flex-wrap: wrap;
    gap: .7rem;
    align-items: flex-end;
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: .65rem;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: .4rem;
}

input, select, textarea {
    font: inherit;
    font-size: .875rem;
    color: var(--ink);
    background: var(--card);
    border: 1px solid var(--hair);
    border-radius: 0;
    padding: .6rem .7rem;
    width: 100%;
    min-width: 0;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--ink);
}
textarea { min-height: 6rem; resize: vertical; }

.field { flex: 1 1 12rem; }
.field.sm { flex: 0 1 7rem; }
.field.xs { flex: 0 1 5.5rem; }

button {
    font: inherit;
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--on-accent);
    background: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 0;
    padding: .7rem 1.3rem;
    cursor: pointer;
    white-space: nowrap;
}
button:hover { opacity: .82; }

button.ghost {
    background: transparent;
    color: var(--muted);
    border-color: var(--hair);
    padding: .45rem .8rem;
    letter-spacing: .08em;
}
button.ghost:hover { color: var(--ink); border-color: var(--ink); opacity: 1; }
button.ghost.danger:hover { color: var(--bad); border-color: var(--bad); }

.inline { display: inline; }
.actions { display: flex; gap: .4rem; justify-content: flex-end; }

/* ---------------------------------------------------------------- notices -- */

.flash {
    border-left: 2px solid var(--ink);
    padding: .8rem 1rem;
    margin-bottom: 1.6rem;
    font-size: .875rem;
    background: var(--card);
}
.flash.err { border-color: var(--bad); color: var(--bad); }
.flash.ok  { border-color: var(--good); }

/* ----------------------------------------------------------------- login -- */

.gate {
    min-height: 100vh;
    min-height: 100dvh;
    display: grid;
    place-items: center;
    padding: 2rem;
}

.gate-in { width: 100%; max-width: 21rem; }

.gate .wordmark {
    font-size: 1.05rem;
    display: block;
    margin-bottom: .5rem;
}
.gate .sub {
    color: var(--muted);
    font-size: .78rem;
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--hair);
}
.gate .stack > * + * { margin-top: 1.1rem; }
.gate button { width: 100%; padding: .8rem; }
.gate .hint {
    margin-top: 2rem;
    font-size: .72rem;
    color: var(--muted);
    line-height: 1.7;
}

/* ----------------------------------------------------------------- misc --- */

.cards { display: grid; gap: 1px; background: var(--hair); border: 1px solid var(--hair); }
.card { background: var(--paper); padding: 1.3rem 1.4rem; }
.card h3 { margin: 0 0 .3rem; font-size: .95rem; font-weight: 500; }
.card .meta { font-size: .75rem; color: var(--muted); }
.card p { margin: .8rem 0 0; font-size: .875rem; white-space: pre-wrap; }

.day { margin-bottom: 2.2rem; }
.day.is-today .day-name { color: var(--ink); }
.day-name {
    font-size: .65rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
    padding-bottom: .6rem;
    border-bottom: 1px solid var(--hair);
    margin-bottom: .2rem;
}

.pill {
    font-size: .65rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    border: 1px solid var(--hair);
    padding: .15rem .5rem;
}

.radios { display: flex; gap: .1rem; }
.radios label {
    margin: 0;
    padding: .45rem .7rem;
    border: 1px solid var(--hair);
    cursor: pointer;
    letter-spacing: .06em;
    color: var(--muted);
    background: var(--card);
    user-select: none;
}
.radios input { position: absolute; opacity: 0; pointer-events: none; }
.radios input:checked + span { color: var(--on-accent); }
.radios label:has(input:checked) {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--on-accent);
}

.tabs { display: flex; gap: 1.2rem; margin-bottom: 1.8rem; font-size: .8rem; }
.tabs a { color: var(--muted); }
.tabs a.on { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

footer {
    max-width: 1040px;
    margin: 4rem auto 0;
    padding: 1.4rem var(--space) 2.5rem;
    border-top: 1px solid var(--hair);
    font-size: .7rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
}

@media (max-width: 620px) {
    th, td { padding-right: .7rem; }
    .whoami { font-size: .72rem; }
}

/* ----------------------------------------------------------------- theme -- */

.theme {
    font: inherit;
    font-size: .72rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
}
.theme:hover { color: var(--ink); opacity: 1; }
.theme::before {
    content: "";
    display: inline-block;
    width: .55rem;
    height: .55rem;
    margin-right: .45rem;
    border: 1px solid currentColor;
    border-radius: 50%;
    vertical-align: baseline;
}
.theme[data-mode="light"]::before { background: currentColor; }
.theme[data-mode="dark"]::before  { background: linear-gradient(90deg, currentColor 50%, transparent 50%); }

.gate .theme { margin-top: 1.6rem; }