/* Lernkicker: calm, big touch targets, one task per screen. Pitch green as the accent. */
:root {
    --green: #1f8f4e;
    --green-dark: #166b3a;
    --green-light: #e3f3e8;
    --background: #f4f8f2;
    --paper: #ffffff;
    --text: #1d2a22;
    --muted: #5b6b61;
    --line: #d5e0d8;
    --red: #b3261e;
    --red-light: #fbe7e5;
    --gold: #e0a100;
    --science: #2e8b57;
    --german: #c0392b;
    --math: #2563eb;
    --english: #7c3aed;
    --other: #64748b;
    --radius: 14px;
    color-scheme: light;
}

* { box-sizing: border-box; }

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

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font: 18px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}

a { color: var(--green-dark); }

h1 { font-size: 1.7rem; line-height: 1.2; margin: 0.4em 0 0.3em; }
h2 { font-size: 1.25rem; margin: 0 0 0.6em; }
h3 { font-size: 1.05rem; margin: 1em 0 0.4em; }

h1:focus { outline: none; }

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--green);
    padding: max(10px, env(safe-area-inset-top)) 16px 10px;
}

.languages { display: flex; gap: 4px; }
.languages button {
    min-height: 36px;
    padding: 4px 10px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 999px;
    background: transparent;
    color: #fff;
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}
.languages button.on { background: #fff; color: var(--green-dark); font-weight: 600; }

.header .brand { color: #fff; font-weight: 700; font-size: 1.15rem; text-decoration: none; }

.page {
    max-width: 720px;
    margin: 0 auto;
    padding: 12px 16px calc(48px + env(safe-area-inset-bottom));
}

/* Loading */
.loading { display: grid; place-items: center; min-height: 80vh; text-align: center; color: var(--muted); }
.ball { font-size: 3.5rem; animation: rollen 1.6s ease-in-out infinite; }
@keyframes rollen { 50% { transform: translateY(-12px) rotate(180deg); } }
@media (prefers-reduced-motion: reduce) { .ball { animation: none; } }
.loading-text { color: var(--muted); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 48px;
    padding: 10px 20px;
    border: 2px solid var(--green);
    border-radius: 999px;
    background: var(--green);
    color: #fff;
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn.quiet { background: transparent; color: var(--green-dark); }
.btn.danger { background: var(--red); border-color: var(--red); }
.btn.goal { font-size: 1.15rem; padding-inline: 32px; }
.buttons { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 20px 0; }

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
}

/* Cards (tasks for the child, children for parents) */
.cards { list-style: none; padding: 0; display: grid; gap: 12px; }
.card {
    display: grid;
    gap: 2px;
    padding: 16px 18px;
    border-radius: var(--radius);
    background: var(--paper);
    border-left: 8px solid var(--other);
    box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
    color: var(--text);
    text-decoration: none;
}
.card .subject { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.card .title { font-size: 1.2rem; font-weight: 700; }
.card .due { color: var(--muted); }
.stars { color: var(--gold); font-size: 1.3rem; letter-spacing: 2px; }
.stars.big { font-size: 3rem; text-align: center; }

.subject-science { border-left-color: var(--science); }
.subject-german { border-left-color: var(--german); }
.subject-math { border-left-color: var(--math); }
.subject-english { border-left-color: var(--english); }
.subject-other { border-left-color: var(--other); }

.empty { text-align: center; padding: 32px 0; color: var(--muted); }
.tip, .hint, .subtitle { color: var(--muted); font-size: 0.95rem; }
.parents-link { margin-top: 32px; }
.grown-ups { margin-top: 48px; color: var(--muted); font-size: 0.85rem; }
.grown-ups > summary { cursor: pointer; width: max-content; }

/* PIN pad */
.pin-pad { max-width: 320px; margin: 16px auto; text-align: center; }
.pin-dots { display: flex; justify-content: center; gap: 16px; margin-bottom: 16px; }
.pin-dot { width: 20px; height: 20px; border-radius: 50%; border: 3px solid var(--green); }
.pin-dot.full { background: var(--green); }
.keys { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.keys button {
    min-height: 68px;
    border-radius: 50%;
    border: none;
    background: var(--paper);
    box-shadow: 0 1px 3px rgb(0 0 0 / 12%);
    font: inherit;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text);
    aspect-ratio: 1;
    justify-self: center;
    width: 72px;
}

/* Practising */
.practice-header { display: flex; gap: 12px; align-items: center; color: var(--muted); font-weight: 600; }
.practice-header .close { text-decoration: none; font-size: 1.3rem; color: var(--muted); }
.progress { width: 100%; height: 10px; margin-top: 10px; accent-color: var(--green); }
.counter { color: var(--muted); margin: 4px 0 12px; }

.exercise { background: var(--paper); border-radius: var(--radius); padding: 18px; box-shadow: 0 1px 3px rgb(0 0 0 / 8%); }
.exercise h2, .exercise-result h3 { display: flex; gap: 12px; align-items: baseline; }
.points { margin-left: auto; font-size: 0.85rem; font-weight: 400; color: var(--muted); white-space: nowrap; }

select, input, textarea {
    font: inherit;
    font-size: 1rem;
    color: var(--text);
    background: var(--paper);
    border: 2px solid var(--line);
    border-radius: 10px;
    padding: 8px 10px;
    max-width: 100%;
}
textarea { width: 100%; font-family: ui-monospace, monospace; font-size: 0.85rem; }

.cloze { line-height: 2.6; }
.cloze .gap { margin: 0 4px; }
input.gap { width: 9em; }

.rows, .statements, .fields, .steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.rows li, .statements li { display: grid; gap: 8px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.rows li:last-child, .statements li:last-child { border-bottom: none; }
.fields input { width: 100%; }
.fields label { display: grid; gap: 4px; }

.choice { display: flex; gap: 10px; }
.choice button, .option {
    flex: 1;
    min-height: 48px;
    padding: 10px 14px;
    border-radius: 12px;
    border: 2px solid var(--line);
    background: var(--paper);
    font: inherit;
    color: var(--text);
    text-align: left;
    cursor: pointer;
}
.choice button { text-align: center; }
.choice button.on, .option.on { border-color: var(--green); background: var(--green-light); font-weight: 600; }

.step {
    width: 100%;
    display: flex;
    gap: 12px;
    align-items: center;
    min-height: 52px;
    padding: 8px 12px;
    border-radius: 12px;
    border: 2px solid var(--line);
    background: var(--paper);
    font: inherit;
    color: var(--text);
    text-align: left;
    cursor: pointer;
}
.step .badge {
    flex: none;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px dashed var(--muted);
    display: grid;
    place-items: center;
    font-weight: 700;
    color: var(--green-dark);
}
.step.set { border-color: var(--green); }
.step.set .badge { border: 2px solid var(--green); background: var(--green-light); }
.steps + .btn { margin-top: 12px; }

.question { border: none; padding: 0; margin: 0 0 18px; display: grid; gap: 8px; }
.question legend { font-weight: 600; margin-bottom: 8px; padding: 0; }

/* Results */
.result .total { text-align: center; font-size: 1.2rem; font-weight: 700; margin: 0; }
.result .praise { text-align: center; color: var(--green-dark); font-weight: 600; }
.exercise-result { background: var(--paper); border-radius: var(--radius); padding: 14px 16px; margin-top: 12px; border-left: 6px solid var(--red); }
.exercise-result.full { border-left-color: var(--green); }
.exercise-result ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.exercise-result li { display: grid; grid-template-columns: 1.4em 1fr; }
.exercise-result li small { grid-column: 2; color: var(--muted); }
.exercise-result li.ok > span:first-child { color: var(--green); font-weight: 700; }
.exercise-result li.wrong > span:first-child { color: var(--red); font-weight: 700; }
.takeaway { background: var(--green-light); border-radius: 10px; padding: 8px 12px; margin-bottom: 0; }

/* Parent pages */
.form { display: grid; gap: 12px; margin: 12px 0; }
.form label { display: grid; gap: 4px; font-weight: 600; }
.form label input, .form label select { font-weight: 400; }
.form .btn { justify-self: start; }
.form.row { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); align-items: end; }
.check { grid-template-columns: auto 1fr !important; align-items: start; font-weight: 400 !important; }
.check input { width: 22px; height: 22px; margin-top: 3px; }

.box { background: var(--paper); border-radius: var(--radius); padding: 16px 18px; margin: 16px 0; box-shadow: 0 1px 3px rgb(0 0 0 / 8%); }
.box > summary { font-weight: 700; cursor: pointer; }
.parents-nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0 20px; }

.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.list li {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--line);
    border-left: 6px solid var(--line);
}
.list li > div { display: grid; min-width: 0; }
.list small { color: var(--muted); }
.shared-badge { color: var(--green-dark) !important; font-weight: 600; }
.shared-badge::before { content: "🌍 "; }
.preview-banner { background: #fff8e1; border-radius: var(--radius); padding: 12px 16px; margin: 8px 0 16px; display: grid; gap: 8px; justify-items: start; }
.preview-banner p { margin: 0; }
.preview-exercise { margin-bottom: 16px; }
.filters { margin-bottom: 16px; }
.locked-badge { background: var(--red-light); color: var(--red); border-radius: 6px; padding: 0 6px; font-size: 0.85rem; margin-left: 6px; }

.table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.table th, .table td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.table tbody tr { cursor: pointer; }
.table tr.active { background: var(--green-light); }

.file { display: inline-grid; gap: 6px; font-weight: 600; margin-bottom: 12px; }
.qr { max-width: 260px; margin: 12px 0; }
.qr svg { width: 100%; height: auto; }
.code-big { font: 700 1.8rem/1 ui-monospace, monospace; letter-spacing: 0.15em; }
.code { font: 700 1.4rem ui-monospace, monospace; letter-spacing: 0.15em; text-transform: uppercase; width: 100%; }
.link { width: 100%; }

/* Calendar */
.calendar details { margin: 12px 0; }
.calendar details > summary { cursor: pointer; font-weight: 600; color: var(--green-dark); }
.calendar .row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.calendar .list li.past { opacity: 0.6; }
.calendar .list small.error { padding: 2px 8px; }
.dates { list-style: none; padding: 0; margin: 0 0 16px; display: grid; gap: 8px; }
.dates li {
    display: grid;
    grid-template-columns: 2rem 1fr;
    column-gap: 8px;
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--paper);
    box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
}
.dates .icon { grid-row: span 2; font-size: 1.5rem; align-self: center; }
.dates .when { color: var(--muted); font-size: 0.9rem; }
.dates .what { font-weight: 700; }

/* Learning material */
.card .known { color: var(--green-dark); font-weight: 600; }
.lesson-block { background: var(--paper); border-radius: var(--radius); padding: 16px 18px; margin: 16px 0; box-shadow: 0 1px 3px rgb(0 0 0 / 8%); border-left: 6px solid var(--line); }
.lesson-block.known { border-left-color: var(--green); }
.lesson-block p, .lesson-block li { line-height: 1.55; }
.known-toggle {
    display: block;
    width: 100%;
    margin-top: 14px;
    padding: 12px;
    font: inherit;
    font-weight: 600;
    border: 2px dashed var(--line);
    border-radius: 12px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}
.known-toggle.on { border: 2px solid var(--green); background: var(--green-light); color: var(--green-dark); }
.facts { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.facts li { background: #fff8e1; border-radius: 10px; padding: 8px 12px; }
.facts li::before { content: "★ "; color: var(--gold); }
.lesson-end { margin: 24px 0; display: grid; gap: 10px; justify-items: start; }

.modes { display: flex; gap: 6px; margin-bottom: 12px; }
.modes button {
    flex: 1;
    padding: 10px 8px;
    font: inherit;
    font-weight: 600;
    border: 2px solid var(--line);
    border-radius: 10px;
    background: var(--paper);
    color: var(--text);
    cursor: pointer;
}
.modes button.on { border-color: var(--green); background: var(--green-light); color: var(--green-dark); }
.level { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-items: center; }
.level span { grid-column: 1 / -1; order: -1; color: var(--muted); font-weight: 600; }
.level .btn { padding: 8px 10px; }
.poem { font-size: 1.15rem; line-height: 1.9; }
.poem .stanza { margin: 0 0 1em; }
.poem .line { display: block; }
.poem .author { color: var(--muted); font-style: italic; font-size: 1rem; }
.poem .revealed { color: var(--green-dark); font-weight: 600; }
.poem .hidden-line { color: var(--line); letter-spacing: 0.3em; }
.gap-word {
    font: inherit;
    letter-spacing: 0.05em;
    color: var(--muted);
    background: var(--green-light);
    border: none;
    border-radius: 6px;
    padding: 0 3px;
    cursor: pointer;
}

.flashcard {
    display: grid;
    place-items: center;
    gap: 8px;
    width: 100%;
    min-height: 150px;
    padding: 20px;
    font: inherit;
    text-align: center;
    border: 2px solid var(--line);
    border-radius: var(--radius);
    background: var(--background);
    color: var(--text);
    cursor: pointer;
}
.flashcard .side { font-size: 1.3rem; font-weight: 700; }
.flashcard small { color: var(--muted); }
.flashcard.flipped { border-color: var(--green); background: var(--green-light); }
.flashcard.flipped .side { font-size: 1.1rem; font-weight: 600; }
.cards-done { text-align: center; }

.error { color: var(--red); background: var(--red-light); border-radius: 10px; padding: 8px 12px; }
.error p, .error ul { margin: 0; }
.ok { color: var(--green-dark); background: var(--green-light); border-radius: 10px; padding: 8px 12px; }

#blazor-error-ui {
    display: none;
    position: fixed;
    inset: auto 0 0 0;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
    background: #fff3c4;
    box-shadow: 0 -1px 4px rgb(0 0 0 / 15%);
    z-index: 10;
}
#blazor-error-ui .dismiss { position: absolute; right: 16px; cursor: pointer; }