/* ═══════════════════════════════════════════════════════════════════
   Insecticon Kursplattform – Design System
   Hybrid: cineastische Naturfilm-Mediathek + ruhiger Lernraum
   ═══════════════════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties ─────────────────────────────────────── */
:root {
  /* Farben */
  --color-forest-950:    #07110D;
  --color-forest-900:    #0B1A14;
  --color-forest-800:    #10251C;
  --color-anthracite-900:#151716;
  --color-anthracite-800:#1E211F;
  --color-offwhite:      #F4EFE7;
  --color-muted:         #B8B0A3;
  --color-muted-dark:    #7A746C;
  --color-insecticon-red:#D04A47;
  --color-sand:          #C89865;
  --color-sand-dim:      #8A6843;

  /* Grenzen & Schatten */
  --border-subtle:       1px solid rgba(255,255,255,0.07);
  --border-card:         1px solid rgba(255,255,255,0.06);
  --shadow-card:         0 4px 24px rgba(0,0,0,0.45);
  --shadow-nav:          0 1px 0 rgba(255,255,255,0.05);

  /* Typografie */
  --font-body:           -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-size-base:      17px;
  --line-height-base:    1.65;

  /* Layout */
  --max-width-page:      1180px;
  --max-width-text:      720px;
  --nav-height:          64px;

  /* Abstände */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radii */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  /* Übergänge */
  --transition-fast:  150ms ease;
  --transition-base:  250ms ease;
}

/* ─── Reset & Base ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-forest-950);
  color: var(--color-offwhite);
  line-height: var(--line-height-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--color-sand); outline-offset: 3px; border-radius: 2px; }

img { display: block; max-width: 100%; }

button { font: inherit; cursor: pointer; }

ul, ol { list-style: none; }

/* ─── Navigation ────────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(7, 17, 13, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--shadow-nav);
}

.site-nav__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-nav__brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-3);
  line-height: 1;
  text-decoration: none;
  flex-shrink: 0;
}

.site-nav__logo {
  height: 32px;
  max-height: 32px;
  width: auto;
  max-width: none;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.site-nav__brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.site-nav__wordmark {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-offwhite);
}

.site-nav__sub {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-sand);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav__link {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-offwhite);
}

.site-nav__logout {
  background: none;
  border: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-muted-dark);
  padding: 0;
  cursor: pointer;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-nav__logout:hover { color: var(--color-insecticon-red); }

/* ─── Footer ────────────────────────────────────────────────────── */
.site-footer {
  margin-top: auto;
  padding: var(--space-7) 0 var(--space-6);
  border-top: var(--border-subtle);
}

.site-footer__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.site-footer__text {
  font-size: 12px;
  color: var(--color-muted-dark);
  letter-spacing: 0.03em;
}

.site-footer__text a {
  color: var(--color-muted-dark);
  transition: color var(--transition-fast);
}

.site-footer__text a:hover { color: var(--color-muted); }

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 11px var(--space-5);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  border: none;
  text-decoration: none;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              transform var(--transition-fast),
              opacity var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1;
}

.btn:active { transform: scale(0.98); }

.btn--primary {
  background-color: var(--color-sand);
  color: var(--color-forest-950);
}

.btn--primary:hover { background-color: #d4a872; }

.btn--secondary {
  background-color: transparent;
  color: var(--color-muted);
  border: 1px solid rgba(255,255,255,0.14);
}

.btn--secondary:hover {
  background-color: rgba(255,255,255,0.05);
  color: var(--color-offwhite);
}

.btn--ghost {
  background: none;
  color: var(--color-muted);
  padding-left: 0;
  padding-right: 0;
}

.btn--ghost:hover { color: var(--color-offwhite); }

.btn--danger {
  background-color: transparent;
  color: var(--color-insecticon-red);
  border: 1px solid rgba(208,74,71,0.3);
}

.btn--danger:hover { background-color: rgba(208,74,71,0.08); }

.btn--wide { width: 100%; justify-content: center; }

.btn--sm { padding: 8px var(--space-4); font-size: 13px; }

.btn--lg { padding: 14px var(--space-6); font-size: 15px; }

/* ─── Forms ─────────────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.form-input {
  background-color: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  color: var(--color-offwhite);
  font: inherit;
  font-size: 15px;
  padding: 11px var(--space-4);
  width: 100%;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
  -webkit-appearance: none;
}

.form-input::placeholder { color: var(--color-muted-dark); }

.form-input:focus {
  outline: none;
  border-color: var(--color-sand-dim);
  background-color: rgba(255,255,255,0.07);
}

.form-error {
  font-size: 13px;
  color: var(--color-insecticon-red);
  padding: var(--space-3) var(--space-4);
  background-color: rgba(208,74,71,0.1);
  border: 1px solid rgba(208,74,71,0.2);
  border-radius: var(--radius-sm);
  display: none;
}

.form-error.is-visible { display: block; }

/* ─── Badges / Labels ───────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1;
}

.badge--unlocked {
  background-color: rgba(200, 152, 101, 0.15);
  color: var(--color-sand);
  border: 1px solid rgba(200, 152, 101, 0.25);
}

.badge--locked {
  background-color: rgba(255,255,255,0.05);
  color: var(--color-muted-dark);
  border: 1px solid rgba(255,255,255,0.08);
}

.badge--level {
  background-color: rgba(255,255,255,0.05);
  color: var(--color-muted);
  border: 1px solid rgba(255,255,255,0.08);
}

/* ─── Progress Bar ──────────────────────────────────────────────── */
.progress-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.progress-bar__track {
  height: 3px;
  background-color: rgba(255,255,255,0.08);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background-color: var(--color-sand);
  border-radius: 100px;
  transition: width 600ms ease;
}

.progress-bar__label {
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.03em;
}

/* ─── Breadcrumb ────────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  color: var(--color-muted-dark);
  letter-spacing: 0.03em;
  flex-wrap: wrap;
}

.breadcrumb__link {
  color: var(--color-muted-dark);
  transition: color var(--transition-fast);
}

.breadcrumb__link:hover { color: var(--color-muted); }

.breadcrumb__sep { color: var(--color-muted-dark); opacity: 0.4; }

.breadcrumb__current { color: var(--color-muted); }

/* ─── Page Layout ───────────────────────────────────────────────── */
.page-wrap {
  flex: 1;
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
  width: 100%;
}

.page-wrap--narrow {
  max-width: 520px;
}

/* ═══════════════════════════════════════════════════════════════════
   LOGIN PAGE
   ═══════════════════════════════════════════════════════════════════ */
.page-login {
  background:
    radial-gradient(ellipse 60% 80% at 30% 60%, rgba(16,37,28,0.9) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 80% 20%, rgba(200,152,101,0.06) 0%, transparent 60%),
    var(--color-forest-950);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.login-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-6);
}

.login-box {
  width: 100%;
  max-width: 420px;
}

.login-header {
  margin-bottom: var(--space-8);
  text-align: center;
}

.login-brand {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-5);
}

.login-title {
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--color-offwhite);
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

.login-subtitle {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.login-form__submit {
  margin-top: var(--space-2);
}

.login-footer {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: center;
}

.login-footer__link {
  font-size: 13px;
  color: var(--color-muted-dark);
  transition: color var(--transition-fast);
}

.login-footer__link:hover { color: var(--color-muted); }

.login-footer__sep {
  display: block;
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-2) 0;
}

/* ═══════════════════════════════════════════════════════════════════
   COURSES PAGE
   ═══════════════════════════════════════════════════════════════════ */
.page-courses {
  background:
    radial-gradient(ellipse 50% 50% at 70% 10%, rgba(16,37,28,0.7) 0%, transparent 60%),
    var(--color-forest-950);
}

.courses-hero {
  padding: var(--space-9) 0 var(--space-7);
  border-bottom: var(--border-subtle);
}

.courses-hero__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.courses-hero__eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-4);
}

.courses-hero__title {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--color-offwhite);
  margin-bottom: var(--space-4);
}

.courses-hero__desc {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 560px;
  line-height: 1.65;
}

.courses-hero__meta {
  margin-top: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.courses-hero__stat {
  font-size: 13px;
  color: var(--color-muted);
}

.courses-hero__stat strong {
  color: var(--color-offwhite);
  font-weight: 600;
}

.courses-section {
  padding: var(--space-8) 0 var(--space-9);
}

.courses-section__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
}

/* Kurskartten */
.course-card {
  background-color: var(--color-anthracite-800);
  border: var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
  position: relative;
}

.course-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}

.course-card--locked {
  opacity: 0.65;
  filter: saturate(0.5);
}

.course-card--locked:hover {
  opacity: 0.78;
  filter: saturate(0.65);
}

.course-card__cover {
  aspect-ratio: 16 / 9;
  background: linear-gradient(
    135deg,
    var(--color-forest-800) 0%,
    var(--color-anthracite-900) 50%,
    rgba(200,152,101,0.12) 100%
  );
  position: relative;
  overflow: hidden;
}

.course-card__cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 40%,
    rgba(30,33,31,0.7) 100%
  );
}

.course-card__cover-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.course-card__cover-icon svg {
  width: 48px;
  height: 48px;
  opacity: 0.15;
}

.course-card__cover-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.course-card__badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 2;
}

.course-card__body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.course-card__title {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.35;
  color: var(--color-offwhite);
}

.course-card__subtitle {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.55;
  margin-top: -var(--space-2);
}

.course-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.course-card__meta-item {
  font-size: 12px;
  color: var(--color-muted-dark);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.course-card__progress {
  margin-top: auto;
}

.course-card__actions {
  padding: var(--space-4) var(--space-5);
  border-top: var(--border-subtle);
  display: flex;
  gap: var(--space-3);
}

/* ═══════════════════════════════════════════════════════════════════
   COURSE DETAIL PAGE
   ═══════════════════════════════════════════════════════════════════ */
.course-hero {
  background:
    linear-gradient(to bottom, var(--color-forest-800) 0%, var(--color-forest-950) 100%);
  padding: var(--space-9) 0 var(--space-8);
  border-bottom: var(--border-subtle);
}

.course-hero__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.course-hero__nav {
  margin-bottom: var(--space-6);
}

.course-hero__eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-3);
}

.course-hero__title {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--color-offwhite);
  margin-bottom: var(--space-3);
  max-width: 760px;
}

.course-hero__subtitle {
  font-size: 17px;
  color: var(--color-muted);
  margin-bottom: var(--space-6);
  max-width: 640px;
}

.course-hero__stats {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-bottom: var(--space-7);
}

.course-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.course-stat__value {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-offwhite);
}

.course-stat__label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted-dark);
}

.course-hero__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.course-body {
  padding: var(--space-8) 0;
}

.course-body__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-8);
  align-items: start;
}

/* Lektionsliste */
.lesson-list { display: flex; flex-direction: column; }

.section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-5);
}

.lesson-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: var(--border-subtle);
  text-decoration: none;
  transition: background-color var(--transition-fast);
  border-radius: var(--radius-sm);
}

.lesson-item:last-child { border-bottom: none; }

.lesson-item:hover .lesson-item__title { color: var(--color-sand); }

.lesson-item__num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--color-muted-dark);
  margin-top: 2px;
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
}

.lesson-item--done .lesson-item__num {
  background-color: rgba(200,152,101,0.15);
  border-color: var(--color-sand-dim);
  color: var(--color-sand);
}

.lesson-item__content { flex: 1; min-width: 0; }

.lesson-item__title {
  font-size: 15px;
  color: var(--color-offwhite);
  line-height: 1.4;
  margin-bottom: 3px;
  transition: color var(--transition-fast);
}

.lesson-item__meta {
  font-size: 12px;
  color: var(--color-muted-dark);
}

/* Kurs-Seitenleiste */
.course-sidebar { display: flex; flex-direction: column; gap: var(--space-5); }

.sidebar-card {
  background-color: var(--color-anthracite-800);
  border: var(--border-card);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.sidebar-card__title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-4);
}

/* Materialien */
.material-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: var(--border-subtle);
}

.material-item:last-child { border-bottom: none; }

.material-item__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background-color: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.material-item__icon svg {
  width: 16px;
  height: 16px;
  color: var(--color-muted-dark);
}

.material-item__content { flex: 1; min-width: 0; }

.material-item__title {
  font-size: 13px;
  color: var(--color-offwhite);
  margin-bottom: 2px;
}

.material-item__desc {
  font-size: 11px;
  color: var(--color-muted-dark);
}

.material-item__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-2);
  font-size: 12px;
  color: var(--color-sand-dim);
  transition: color var(--transition-fast);
}

.material-item__link:hover { color: var(--color-sand); }

/* ═══════════════════════════════════════════════════════════════════
   LESSON PAGE
   ═══════════════════════════════════════════════════════════════════ */
.page-lesson {
  background-color: var(--color-forest-950);
}

.lesson-nav {
  padding: var(--space-5) 0;
  border-bottom: var(--border-subtle);
}

.lesson-nav__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.lesson-nav__progress-text {
  font-size: 12px;
  color: var(--color-muted-dark);
  letter-spacing: 0.03em;
}

.lesson-main {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-7) var(--space-6) var(--space-9);
}

.lesson-title {
  font-size: clamp(20px, 3.5vw, 30px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--color-offwhite);
  margin: var(--space-5) 0 var(--space-7);
}

/* Video */
.video-block {
  margin-bottom: var(--space-7);
}

.video-wrap {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-anthracite-900);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border-card);
}

.video-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  background: linear-gradient(
    135deg,
    var(--color-forest-800) 0%,
    var(--color-anthracite-900) 100%
  );
}

.video-placeholder__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-placeholder__icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-muted-dark);
  margin-left: 3px;
}

.video-placeholder__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted-dark);
}

/* Lektionsinhalt */
.lesson-content {
  max-width: var(--max-width-text);
}

.lesson-content + .lesson-content { margin-top: var(--space-7); }

.lesson-h2 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-4);
  margin-top: var(--space-7);
}

.lesson-h2:first-child { margin-top: 0; }

.lesson-h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-offwhite);
  margin-bottom: var(--space-3);
  margin-top: var(--space-5);
}

.lesson-content p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.lesson-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-muted);
}

.lesson-list li::before {
  content: '';
  flex-shrink: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-sand-dim);
  margin-top: 9px;
}

/* Abschluss-Button */
.lesson-complete {
  margin: var(--space-8) 0 var(--space-6);
  padding: var(--space-5);
  background-color: var(--color-anthracite-800);
  border: var(--border-card);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.lesson-complete__label {
  font-size: 14px;
  color: var(--color-muted);
}

.lesson-complete--done .lesson-complete__label {
  color: var(--color-sand);
}

/* Lektionsnavigation */
.lesson-pagination {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: var(--border-subtle);
}

/* Downloads in Lektion */
.lesson-downloads {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.lesson-download-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--color-muted-dark);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.lesson-download-link:hover { color: var(--color-sand); }

.lesson-download-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════
   LOCKED PAGE
   ═══════════════════════════════════════════════════════════════════ */
.locked-hero {
  padding: var(--space-9) 0 var(--space-7);
  background: linear-gradient(
    to bottom,
    var(--color-forest-800) 0%,
    var(--color-forest-950) 100%
  );
  border-bottom: var(--border-subtle);
}

.locked-hero__inner {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.locked-notice {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: 100px;
  background-color: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted-dark);
  margin-bottom: var(--space-5);
}

.locked-lessons {
  opacity: 0.45;
  pointer-events: none;
  user-select: none;
  position: relative;
}

.locked-lessons::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--color-forest-950));
}

/* ═══════════════════════════════════════════════════════════════════
   HELP PAGE
   ═══════════════════════════════════════════════════════════════════ */
.help-wrap {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding: var(--space-9) var(--space-6);
}

.help-title {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 300;
  color: var(--color-offwhite);
  margin-bottom: var(--space-5);
}

.help-section {
  margin-top: var(--space-7);
}

.help-section__title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-4);
}

.help-section p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.help-section ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.help-section li {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-muted);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.help-section li::before {
  content: '';
  flex-shrink: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-sand-dim);
  margin-top: 10px;
}

.help-actions {
  margin-top: var(--space-7);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ═══════════════════════════════════════════════════════════════════
   ERROR PAGE
   ═══════════════════════════════════════════════════════════════════ */
.page-error { flex: 1; display: flex; align-items: center; justify-content: center; }

.error-page__inner {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}

.error-page__code {
  font-size: 80px;
  font-weight: 200;
  line-height: 1;
  color: rgba(255,255,255,0.06);
  margin-bottom: var(--space-5);
}

.error-page__message {
  font-size: 17px;
  color: var(--color-muted);
  margin-bottom: var(--space-6);
}

/* ═══════════════════════════════════════════════════════════════════
   SPINNER
   ═══════════════════════════════════════════════════════════════════ */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.15);
  border-top-color: var(--color-sand);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════════════════════════════
   DISCORD COMMUNITY BOX
   Dezenter, freiwilliger Begleitraum – kein Discord-Look, kein Grau-Blau.
   ═══════════════════════════════════════════════════════════════════ */
.discord-wrap {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-8);
}

.discord-box {
  border: 1px solid rgba(200, 152, 101, 0.22);
  background: linear-gradient(
    135deg,
    rgba(200, 152, 101, 0.06) 0%,
    rgba(208, 74, 71, 0.04) 100%
  );
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.discord-box--final {
  border-color: rgba(208, 74, 71, 0.22);
  background: linear-gradient(
    135deg,
    rgba(208, 74, 71, 0.06) 0%,
    rgba(200, 152, 101, 0.04) 100%
  );
}

.discord-box__content {
  flex: 1;
  min-width: 260px;
}

.discord-box__eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-sand);
  margin-bottom: var(--space-3);
}

.discord-box__title {
  font-size: 17px;
  font-weight: 400;
  color: var(--color-offwhite);
  line-height: 1.35;
  margin-bottom: var(--space-3);
}

.discord-box__text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.discord-box__note {
  font-size: 12px;
  color: var(--color-muted-dark);
  line-height: 1.6;
}

.discord-box__action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  flex-shrink: 0;
  padding-top: 2px;
}

.discord-box__channel {
  font-size: 12px;
  color: var(--color-muted-dark);
}

.discord-box__channel span {
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", monospace;
  font-size: 11px;
  color: var(--color-sand-dim);
}

/* Kursseite: Box sitzt in der Sidebar → vertikal wie die anderen Sidebar-Cards */
.discord-box--course {
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-5);
  border-radius: var(--radius-md);
}

.discord-box--course .discord-box__action {
  width: 100%;
}

.discord-box--course .discord-box__action .btn {
  width: 100%;
  justify-content: center;
}

/* Lektionsseite: Box passt sich der lesson-main Breite an */
.discord-box--lesson {
  margin: var(--space-6) 0;
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .course-body__inner {
    grid-template-columns: 1fr;
  }
  .course-sidebar { order: -1; }
}

@media (max-width: 640px) {
  :root { --font-size-base: 16px; }

  .site-nav__inner { padding: 0 var(--space-4); }
  .site-nav__links { gap: var(--space-4); }
  .site-nav__link:not(.site-nav__logout) { display: none; }

  .courses-hero,
  .course-hero,
  .locked-hero { padding-top: var(--space-7); padding-bottom: var(--space-6); }

  .courses-hero__inner,
  .course-hero__inner,
  .locked-hero__inner,
  .courses-section__inner,
  .course-body__inner { padding-left: var(--space-4); padding-right: var(--space-4); }

  .courses-grid { grid-template-columns: 1fr; }

  .lesson-main { padding: var(--space-5) var(--space-4) var(--space-8); }

  .lesson-pagination { flex-direction: column; }

  .lesson-complete { flex-direction: column; align-items: flex-start; }

  .course-hero__actions { flex-direction: column; }

  .help-wrap { padding-left: var(--space-4); padding-right: var(--space-4); }

  .help-actions { flex-direction: column; }

  .lesson-nav__inner { padding: 0 var(--space-4); }

  .discord-wrap { padding-left: var(--space-4); padding-right: var(--space-4); }

  .discord-box {
    flex-direction: column;
    gap: var(--space-5);
  }

  .discord-box__action { width: 100%; }

  .discord-box__action .btn { width: 100%; justify-content: center; }
}

@media (max-width: 400px) {
  .login-wrap { padding: var(--space-6) var(--space-4); }
}

/* ═══════════════════════════════════════════════════════════════════
   LOGOUT PAGE
   ═══════════════════════════════════════════════════════════════════ */
.page-logout {
  background:
    radial-gradient(ellipse 60% 80% at 70% 60%, rgba(16,37,28,0.85) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 20% 30%, rgba(200,152,101,0.05) 0%, transparent 60%),
    var(--color-forest-950);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.logout-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-6);
}

.logout-box {
  width: 100%;
  max-width: 440px;
  text-align: center;
}

.logout-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-7);
  color: var(--color-muted);
}

.logout-header {
  margin-bottom: var(--space-8);
}

.logout-title {
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--color-offwhite);
  line-height: 1.3;
  margin-bottom: var(--space-4);
}

.logout-subtitle {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

.logout-text {
  font-size: 13px;
  color: var(--color-muted-dark);
  line-height: 1.6;
}

.logout-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (max-width: 400px) {
  .logout-wrap { padding: var(--space-6) var(--space-4); }
}