/* =========================================================
   Hausaufgabenheft — Portfolio Design
========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary:    #0D1117;
  --bg-secondary:  #161B22;
  --bg-card:       #1C2128;
  --border-color:  rgba(48, 54, 61, 0.8);
  --text-primary:  #E6EDF3;
  --text-secondary:#8B949E;
  --accent-blue:   #4F9CF9;
  --accent-green:  #4ADE80;
  --accent-yellow: #FBBF24;
  --font-main:     'Inter', sans-serif;
  --radius:        12px;
  --transition:    0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  background-image: radial-gradient(circle at 1px 1px, rgba(48,54,61,0.5) 1px, transparent 0);
  background-size: 24px 24px;
  color: var(--text-primary);
  min-height: 100vh;
  padding: 0;
}

/* ── Back Nav ───────────────────────────────────────────── */
.back-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,17,23,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
}
.back-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}
.back-nav a::before { content: '←'; }
.back-nav a:hover { color: var(--accent-blue); }

/* ── Container ──────────────────────────────────────────── */
.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ── Heading ────────────────────────────────────────────── */
h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
}

/* ── Nav links ──────────────────────────────────────────── */
.nav {
  display: flex;
  gap: 10px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.nav a {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.nav a:hover {
  color: var(--accent-blue);
  border-color: rgba(79,156,249,0.4);
  background: rgba(79,156,249,0.06);
}

/* ── Dashboard Card ─────────────────────────────────────── */
.dashboard {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
}
.dashboard h2 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.dashboard > p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 20px; }

.dashboard ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}
.dashboard ul li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
.dashboard ul li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-blue);
  flex-shrink: 0;
}
.dashboard ul li strong { color: var(--text-primary); font-weight: 600; }
.dashboard > p:last-child { margin-bottom: 0; }

/* ── Forms (other pages) ────────────────────────────────── */
form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 4px;
}

input[type="text"], input[type="date"], textarea, select {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(79,156,249,0.15);
}
textarea { min-height: 80px; resize: vertical; }
select option { background: var(--bg-secondary); }

input[type="submit"] {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 11px 24px;
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  align-self: flex-start;
  transition: background var(--transition), transform var(--transition);
}
input[type="submit"]:hover { background: #6aaff9; transform: translateY(-1px); }

/* ── List items (hausaufgaben / notizen) ────────────────── */
ul { list-style: none; padding: 0; }
li {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 8px;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  transition: border-color var(--transition);
}
li:hover { border-color: rgba(79,156,249,0.3); }

.homework-fach { font-weight: 600; color: var(--text-primary); }
.homework-datum { color: var(--text-secondary); font-size: 0.85rem; }

/* ── Buttons ─────────────────────────────────────────────── */
.back-button, .logout-button {
  display: inline-block;
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-decoration: none;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: color var(--transition), border-color var(--transition);
}
.back-button:hover, .logout-button:hover {
  color: var(--text-primary);
  border-color: rgba(139,148,158,0.5);
}

.delete-button {
  display: inline-block;
  color: #F87171;
  font-size: 0.8rem;
  text-decoration: none;
  padding: 4px 10px;
  border: 1px solid rgba(248,113,113,0.3);
  border-radius: 6px;
  transition: background var(--transition);
}
.delete-button:hover { background: rgba(248,113,113,0.1); }