:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --card: #1e293b;
  --card-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --ok: #22c55e;
  --err: #ef4444;
  --radius: 14px;
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.4;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.82rem; }
.error { color: var(--err); }

.screen { min-height: 100dvh; }

/* ---------- Login ---------- */
#login { display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card {
  width: 100%; max-width: 340px; text-align: center;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 20px; padding: 32px 24px;
}
.login-card .logo { font-size: 44px; }
.login-card h1 { margin: 8px 0 4px; font-size: 1.5rem; }
.login-card input {
  width: 100%; margin: 18px 0 12px; padding: 14px;
  font-size: 1.3rem; text-align: center; letter-spacing: 4px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
}

/* ---------- Buttons ---------- */
button { font: inherit; cursor: pointer; border: none; border-radius: var(--radius); }
.primary {
  width: 100%; padding: 15px; font-weight: 600; font-size: 1.05rem;
  background: var(--accent-strong); color: #06263a;
}
.primary:active { transform: translateY(1px); }
.ghost {
  background: transparent; color: var(--text);
  font-size: 1.8rem; width: 44px; height: 44px; line-height: 1;
}

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 12px calc(14px + env(safe-area-inset-top, 0px));
  padding-top: max(14px, env(safe-area-inset-top, 0px));
  background: rgba(15, 23, 42, 0.9); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.date-block { text-align: center; }
.date-label { font-weight: 700; font-size: 1.15rem; }

/* ---------- Oura-Karte ---------- */
.oura-card {
  margin: 14px 16px 0;
  background: linear-gradient(135deg, #1e293b, #273449);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px;
  display: flex; flex-wrap: wrap; gap: 14px;
}
.oura-card .oura-item { display: flex; flex-direction: column; }
.oura-card .oura-val { font-weight: 700; font-size: 1.1rem; }
.oura-card .oura-key { font-size: 0.72rem; color: var(--muted); }

/* ---------- Formular ---------- */
#form { padding: 8px 16px 140px; }
.group { margin-top: 22px; }
.group-title {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 1px;
  color: var(--muted); margin: 0 4px 10px;
}
.field {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 13px 14px; margin-bottom: 10px;
}
.field-label {
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 500; margin-bottom: 10px;
}
.field-label .hint { font-size: 0.72rem; color: var(--muted); font-weight: 400; }

/* Schulnoten 1-6 */
.grades { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.grade {
  padding: 12px 0; text-align: center; font-weight: 700;
  background: var(--bg); color: var(--muted);
  border: 1px solid var(--border); border-radius: 10px;
  transition: transform .05s;
}
.grade[data-v="1"].on { background: #16a34a; }
.grade[data-v="2"].on { background: #4d9c1f; }
.grade[data-v="3"].on { background: #b0a412; }
.grade[data-v="4"].on { background: #d98218; }
.grade[data-v="5"].on { background: #e05a1c; }
.grade[data-v="6"].on { background: #dc2626; }
.grade.on { color: #fff; border-color: transparent; }

/* Toggle */
.toggle-field { display: flex; justify-content: space-between; align-items: center; }
.toggle-field .field-label { margin-bottom: 0; }
.switch {
  width: 54px; height: 32px; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--border);
  position: relative; flex: none;
}
.switch::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--muted); transition: .18s;
}
.switch.on { background: var(--ok); border-color: transparent; }
.switch.on::after { left: 25px; background: #fff; }

/* Zahl mit Stepper */
.stepper { display: flex; align-items: center; gap: 10px; }
.stepper button {
  width: 44px; height: 44px; font-size: 1.4rem; flex: none;
  background: var(--card-2); color: var(--text); border: 1px solid var(--border);
}
.stepper input {
  flex: 1; min-width: 0; text-align: center; font-size: 1.15rem; font-weight: 600;
  padding: 11px 6px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
}
.stepper .unit { color: var(--muted); min-width: 30px; font-size: .9rem; }

/* ---------- Save-Bar ---------- */
.save-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 6;
  padding: 12px 16px calc(12px + var(--safe-b));
  background: linear-gradient(to top, var(--bg) 70%, transparent);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: calc(90px + var(--safe-b));
  transform: translateX(-50%);
  background: var(--card-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 10px 18px; font-size: .92rem; z-index: 20;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}
.toast.ok { border-color: var(--ok); }
.toast.err { border-color: var(--err); }