/* ===========================================================================
   Klassenkalender — styles
   Mobile first: assume every single user is on a phone, in a hallway, in a
   hurry. Anything that needs a mouse or a big screen is wrong.
   =========================================================================== */

:root {
  --bg:        #f6f6f9;
  --surface:   #ffffff;
  --text:      #16161d;
  --muted:     #6b6b7b;
  --line:      #e4e4ed;
  --accent:    #5b5bd6;
  --accent-c:  #ffffff;
  --danger:    #d5304a;
  --warn-bg:   #fff4d6;
  --warn-line: #f0c860;
  --warn-text: #6b4c00;
  --shadow:    0 1px 2px rgba(20, 20, 40, .06), 0 8px 24px rgba(20, 20, 40, .06);

  --k-schularbeit: #d5304a;
  --k-test:        #e07a1f;
  --k-hausuebung:  #2f7bd6;
  --k-abgabe:      #8a4fd0;
  --k-referat:     #1f9a6a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #121218;
    --surface:   #1c1c25;
    --text:      #ececf2;
    --muted:     #9a9aae;
    --line:      #2e2e3c;
    --accent:    #8b8bf0;
    --accent-c:  #14141c;
    --danger:    #ff6b80;
    --warn-bg:   #3a2f10;
    --warn-line: #6d5a1e;
    --warn-text: #ffdf94;
    --shadow:    0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);

    --k-schularbeit: #ff6b80;
    --k-test:        #ffa04d;
    --k-hausuebung:  #66aaff;
    --k-abgabe:      #b98bf0;
    --k-referat:     #4fd0a0;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px calc(96px + env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.view { max-width: 560px; margin: 0 auto; }
[hidden] { display: none !important; }


/* ------------------------------ language ---------------------------------- */

.lang-toggle {
  flex-shrink: 0;
  padding: 6px 10px;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}
.lang-toggle:active { transform: translateY(1px); }

/* on the start screen it sits in the top-right corner */
.lang-toggle.floating { position: absolute; top: 16px; right: 16px; z-index: 2; }
#view-start { position: relative; }


/* ---------------------------------- hero --------------------------------- */

.hero { text-align: center; padding: 40px 0 24px; }
.hero-mark { font-size: 44px; line-height: 1; }
.hero h1 { margin: 10px 0 6px; font-size: 28px; letter-spacing: -.02em; }
.sub { margin: 0; color: var(--muted); font-size: 15px; }


/* ---------------------------------- cards -------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 12px; font-size: 15px; font-weight: 600; }

.row { display: flex; gap: 8px; }
.row .input { flex: 1; min-width: 0; }

.hint { margin: 10px 0 0; font-size: 13px; color: var(--muted); }


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

.input {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 16px;               /* 16px stops iOS zooming in on focus */
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

textarea.input { resize: vertical; }

.code-input {
  text-transform: uppercase;
  letter-spacing: .18em;
  font-weight: 600;
}
/* the uppercase transform above would otherwise also shout at the placeholder */
.code-input::placeholder { text-transform: none; letter-spacing: normal; font-weight: 400; }

.label { display: block; margin: 16px 0 6px; font-size: 13px; font-weight: 600; }
.label .opt { font-weight: 400; color: var(--muted); }

.btn {
  padding: 12px 18px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
  white-space: nowrap;
}
.btn.primary { background: var(--accent); color: var(--accent-c); border-color: transparent; }
.btn.ghost   { background: transparent; }
.btn:disabled { opacity: .5; cursor: default; }
.btn:active:not(:disabled) { transform: translateY(1px); }

.linkbtn {
  padding: 0;
  font: inherit;
  font-weight: 600;
  color: var(--accent);
  background: none;
  border: 0;
  cursor: pointer;
  text-decoration: underline;
}

.icon-btn {
  padding: 8px 10px;
  min-width: 40px;
  font: inherit;
  font-size: 18px;
  color: var(--text);
  background: transparent;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}
.icon-btn.wide { font-size: 14px; font-weight: 600; color: var(--accent); }


/* --------------------------------- saved --------------------------------- */

.saved-list { list-style: none; margin: 0; padding: 0; }
.saved-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.saved-list li:last-child { border-bottom: 0; }
.saved-open {
  flex: 1;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 0;
  font: inherit;
  color: var(--text);
  text-align: left;
  background: none;
  border: 0;
  cursor: pointer;
}
.saved-open strong { font-size: 16px; }

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--muted);
}

.forget {
  padding: 4px 8px;
  font-size: 13px;
  color: var(--muted);
  background: none;
  border: 0;
  cursor: pointer;
}


/* --------------------------------- topbar -------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 -16px 12px;
  padding: 10px 8px calc(10px + env(safe-area-inset-top));
  padding-top: calc(10px + env(safe-area-inset-top));
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-title { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar-title strong { font-size: 17px; }


/* --------------------------------- stress -------------------------------- */

.stress {
  margin-bottom: 14px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--warn-text);
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 14px;
}
.stress strong { display: block; margin-bottom: 2px; }


/* --------------------------------- events -------------------------------- */

.events { list-style: none; margin: 0; padding: 0; }

.event {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  margin-bottom: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--kind, var(--line));
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.event.is-today { border-color: var(--danger); }

.event-main { flex: 1; min-width: 0; }
.event-top { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.event-subject { font-weight: 600; overflow-wrap: anywhere; }
.event-kind { font-size: 12px; font-weight: 600; color: var(--kind, var(--muted)); }
.event-when { margin-top: 2px; font-size: 13px; color: var(--muted); }
.event-note { margin-top: 6px; font-size: 14px; color: var(--muted); overflow-wrap: anywhere; }

.countdown {
  flex-shrink: 0;
  min-width: 66px;
  text-align: right;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}
.countdown.urgent { color: var(--danger); }

.event-del {
  flex-shrink: 0;
  align-self: center;
  padding: 6px 8px;
  font-size: 15px;
  color: var(--muted);
  background: none;
  border: 0;
  cursor: pointer;
}

.empty { padding: 48px 0; text-align: center; color: var(--muted); }

.share-nudge {
  margin-top: 22px;
  padding: 14px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 14px;
}
.share-nudge .linkbtn { display: block; margin-top: 4px; }


/* ----------------------------------- fab --------------------------------- */

.fab {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 6;
  padding: 14px 26px;
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-c);
  background: var(--accent);
  border: 0;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(40, 40, 120, .28);
  cursor: pointer;
}
.fab:active { transform: translateX(-50%) translateY(1px); }


/* ---------------------------------- sheet -------------------------------- */

.sheet {
  width: min(520px, 100%);
  margin: auto auto 0;
  padding: 20px 18px calc(20px + env(safe-area-inset-bottom));
  color: var(--text);
  background: var(--surface);
  border: 0;
  border-radius: 20px 20px 0 0;
  box-shadow: var(--shadow);
}
@media (min-width: 560px) {
  .sheet { margin: auto; border-radius: 20px; }
}
.sheet::backdrop { background: rgba(0, 0, 0, .45); }
.sheet h2 { margin: 0 0 4px; font-size: 18px; }

.kinds { margin: 14px 0 0; padding: 0; border: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.kinds .label { width: 100%; margin: 0 0 2px; padding: 0; }

.chip { cursor: pointer; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.chip input:checked + span { color: var(--accent-c); background: var(--kind, var(--accent)); border-color: transparent; }
.chip input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.k-schularbeit { --kind: var(--k-schularbeit); }
.k-test        { --kind: var(--k-test); }
.k-hausuebung  { --kind: var(--k-hausuebung); }
.k-abgabe      { --kind: var(--k-abgabe); }
.k-referat     { --kind: var(--k-referat); }

.sheet-actions { display: flex; gap: 8px; margin-top: 20px; }
.sheet-actions .btn { flex: 1; }


/* ---------------------------------- toast -------------------------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(88px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 14px;
  width: max-content;
  max-width: calc(100vw - 32px);
  padding: 12px 16px;
  font-size: 14px;
  color: var(--surface);
  background: var(--text);
  border-radius: 12px;
  box-shadow: var(--shadow);
}
.toast .linkbtn { color: inherit; }


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

.error {
  margin: 12px 0 0;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, transparent);
  border-radius: 10px;
}

.footer { margin: 28px 0 8px; text-align: center; font-size: 13px; color: var(--muted); }
.footer a { color: var(--muted); }

.page { max-width: 560px; margin: 0 auto; padding: 32px 0; }
.page-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.page-top a { color: var(--accent); }
.page h1 { font-size: 22px; }
.page h2 { margin-top: 28px; font-size: 16px; }
.page a { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}