/* ───────────────────────────────────────────────────────────────
   MicroSkills Demo-Landing — style.css
   Visueller Clone von msc-frontend (frontend-praesentations-doktrin v2.0)
   Palette C "Playful Trust": #06B6D4 Electric Teal / #F97316 Vivid Coral
   Fonts: Space Grotesk (headings) + DM Sans (body) via Google Fonts
   ─────────────────────────────────────────────────────────────── */

/* ─── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button, a, [role="button"] { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

:root {
  /* Palette C "Playful Trust" — frontend-praesentations-doktrin.md v2.0 */
  --color-primary:         #06B6D4;
  --color-primary-hover:   #0891B2;
  --color-primary-light:   #22D3EE;
  --color-primary-subtle:  #CFFAFE;
  --color-primary-xsubtle: #ECFEFF;
  --color-accent:          #F97316;
  --color-accent-hover:    #EA580C;
  --color-success:         #6EE7B7;
  --color-bg:              #FFFFFF;
  --color-bg-subtle:       #F8FAFC;
  --color-surface:         #FFFFFF;
  --color-text:            #0F172A;
  --color-text-muted:      #475569;
  --color-border:          #E2E8F0;

  /* Shadows */
  --shadow-sm: 0 1px 4px rgba(6, 182, 212, 0.08);
  --shadow-md: 0 4px 20px rgba(6, 182, 212, 0.12);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Spacing — 8px Raster */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  /* Motion */
  --motion-fast: 150ms ease-out;
  --motion-base: 250ms ease-out;
  --motion-slow: 300ms ease-out;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 64px; /* Bottom-Nav Platz auf Mobile */
}

@media (min-width: 900px) { body { padding-bottom: 0; } }

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(1.5rem, 5vw, 2.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.35rem, 4vw, 2rem); letter-spacing: -0.015em; }
h3 { font-size: clamp(1.05rem, 2.5vw, 1.3rem); font-weight: 600; }

img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }

button, a.btn-primary, a.nav__cta, .faq__q {
  min-height: 48px;
}

/* ─── Layout ────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 900px) { .container { padding: 0 var(--space-6); } }

section { padding: var(--space-12) 0; }
@media (min-width: 640px)  { section { padding: var(--space-16) 0; } }
@media (min-width: 900px)  { section { padding: var(--space-24) 0; } }

/* ─── Nav ───────────────────────────────────────────────────── */
.nav {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  max-width: 1024px;
  margin: 0 auto;
}

@media (min-width: 900px) { .nav__inner { padding: var(--space-3) var(--space-6); } }

.nav__logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

@media (min-width: 640px) { .nav__logo { font-size: 1.15rem; } }

.nav__logo span { color: var(--color-primary); }

.nav__cta {
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--color-primary-xsubtle);
  color: var(--color-primary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-primary-subtle);
  transition: background var(--motion-fast), border-color var(--motion-fast);
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  white-space: nowrap;
}

.nav__cta:hover {
  background: var(--color-primary-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

/* ─── Demo Slots Section ────────────────────────────────────── */
.demo-slots-section {
  background: var(--color-bg-subtle);
}

.demo-intro {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.slot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .slot-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

@media (min-width: 900px) {
  .slot-grid { grid-template-columns: repeat(3, 1fr); }
}

.slot-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--motion-fast), transform var(--motion-fast);
}

.slot-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.slot-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.slot-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  min-width: 28px;
}

.slot-badge--a {
  background: var(--color-primary-subtle);
  color: var(--color-primary-hover);
}

.slot-badge--b {
  background: #FFF3E7;
  color: var(--color-accent-hover);
}

.slot-badge--c {
  background: var(--color-bg-subtle);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.slot-card__title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.slot-card__body {
  padding: var(--space-4);
  min-height: 140px;
  display: flex;
  align-items: stretch;
}

.slot-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  width: 100%;
  padding: var(--space-4);
  background: var(--color-primary-xsubtle);
  border-radius: var(--radius-md);
  border: 1.5px dashed var(--color-primary-subtle);
}

.slot-placeholder__icon {
  font-size: 1.8rem;
  opacity: 0.5;
}

.slot-placeholder__text {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.slot-placeholder__badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-primary-hover);
  background: var(--color-primary-subtle);
  padding: 2px var(--space-2);
  border-radius: 20px;
  margin-top: var(--space-1);
}

/* ─── Tagline Band ──────────────────────────────────────────── */
.tagline-band {
  background: var(--color-primary);
  color: #FFFFFF;
  padding: var(--space-4) 0;
  text-align: center;
}

.tagline-band p {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  opacity: 0.95;
  color: #fff;
  margin: 0;
}

.tagline-band--top { padding: var(--space-3) 0; }
@media (min-width: 640px) { .tagline-band--top { padding: var(--space-4) 0; } }

/* ─── Hero v2.2 ─────────────────────────────────────────────── */
.hero--v22 {
  padding: var(--space-6) 0 var(--space-8);
  background: linear-gradient(160deg, var(--color-primary-xsubtle) 0%, var(--color-bg) 70%);
}

@media (min-width: 640px) { .hero--v22 { padding: var(--space-10) 0 var(--space-12); } }
@media (min-width: 900px) { .hero--v22 { padding: var(--space-12) 0 var(--space-16); } }

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-8);
}

.hero__content { flex: 1 1 0; min-width: 0; width: 100%; }

.hero h1 {
  color: var(--color-text);
  margin-bottom: var(--space-4);
  max-width: 680px;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__sub {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 0;
  line-height: 1.7;
}

/* ─── Pain Section ──────────────────────────────────────────── */
.pain { background: var(--color-bg); }

.pain h2 { margin-bottom: var(--space-6); max-width: 600px; }

.pain__text {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 620px;
  line-height: 1.75;
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-4);
}

.pain__keywords {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pain__tag {
  background: var(--color-primary-xsubtle);
  color: var(--color-primary-hover);
  font-size: 0.82rem;
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border-radius: 20px;
  border: 1px solid var(--color-primary-subtle);
}

/* ─── Section Labels ────────────────────────────────────────── */
.section-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.section-title { margin-bottom: var(--space-12); }

/* ─── Features ──────────────────────────────────────────────── */
.features { background: var(--color-bg-subtle); }

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

@media (min-width: 900px) {
  .features__grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--motion-fast), transform var(--motion-fast);
}

.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.feature-card__icon {
  width: 44px;
  height: 44px;
  background: var(--color-primary-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: 1.3rem;
}

.feature-card h3 { font-size: 1.05rem; margin-bottom: var(--space-2); color: var(--color-text); }
.feature-card p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.65; }

/* ─── Fachgebiete ───────────────────────────────────────────── */
.fachgebiete { background: var(--color-bg); }

.fachgebiete__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

@media (min-width: 640px) {
  .fachgebiete__grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-4); }
}

.fach-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--motion-fast), transform var(--motion-fast), border-color var(--motion-fast);
  min-height: 120px;
}

.fach-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--color-primary); }

.fach-card__icon { font-size: 1.5rem; }
.fach-card__name { font-family: 'Space Grotesk', sans-serif; font-size: 0.9rem; font-weight: 700; line-height: 1.3; color: var(--color-text); }
.fach-card__cta { font-size: 0.8rem; color: var(--color-primary); font-weight: 600; margin-top: auto; }

/* ─── FAQ ───────────────────────────────────────────────────── */
.faq { background: var(--color-bg); }
.faq__list { max-width: 680px; display: flex; flex-direction: column; gap: 0; }
.faq__item { border-bottom: 1px solid var(--color-border); }
.faq__item:first-child { border-top: 1px solid var(--color-border); }

.faq__q {
  width: 100%;
  background: none;
  border: none;
  padding: var(--space-4) 0;
  text-align: left;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  transition: color var(--motion-fast);
  min-height: 56px;
}

@media (min-width: 640px) { .faq__q { font-size: 1.05rem; } }
.faq__q:hover { color: var(--color-primary); }
.faq__q::after { content: '+'; font-size: 1.5rem; font-weight: 400; color: var(--color-primary); flex-shrink: 0; transition: transform var(--motion-base); }
.faq__item.open .faq__q::after { transform: rotate(45deg); }

.faq__a {
  display: none;
  padding: 0 0 var(--space-4);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 580px;
}

.faq__item.open .faq__a { display: block; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--color-accent);
  color: #FFFFFF;
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background var(--motion-fast), transform var(--motion-fast);
  white-space: normal;
  line-height: 1.3;
  min-height: 48px;
  text-decoration: none;
}

.btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-1px); color: #fff; text-decoration: none; }
.btn-primary:active { transform: translateY(0); }

.btn-primary--light {
  background: #FFFFFF;
  color: var(--color-primary);
}

.btn-primary--light:hover {
  background: var(--color-primary-xsubtle);
  color: var(--color-primary-hover);
}

/* ─── Footer CTA ────────────────────────────────────────────── */
.footer-cta {
  background: var(--color-primary);
  color: #FFFFFF;
  text-align: center;
  padding: var(--space-12) 0;
}

@media (min-width: 640px) { .footer-cta { padding: var(--space-16) 0; } }
@media (min-width: 900px) { .footer-cta { padding: var(--space-24) 0; } }

.footer-cta h2 { margin-bottom: var(--space-6); color: #fff; }

.footer-cta__micro {
  margin-top: var(--space-4);
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
}

/* ─── Footer ────────────────────────────────────────────────── */
.footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.6);
  padding: var(--space-6) 0;
  text-align: center;
  font-size: 0.8rem;
}

.footer a {
  color: rgba(255,255,255,0.6);
  text-decoration: underline;
  margin: 0 var(--space-2);
  display: inline-block;
  padding: var(--space-1) 0;
}

.footer a:hover { color: rgba(255,255,255,0.9); }

/* ─── Bottom Nav (Mobile only) ──────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-around;
  align-items: stretch;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 4px env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.04);
}

.bottom-nav__tab {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: 48px;
  padding: 6px 4px;
  text-decoration: none;
  color: var(--color-text-muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
}

.bottom-nav__tab:hover,
.bottom-nav__tab:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-xsubtle);
  text-decoration: none;
}

.bottom-nav__icon { font-size: 1.1rem; line-height: 1; }
.bottom-nav__label { line-height: 1; }

@media (min-width: 900px) { .bottom-nav { display: none; } }