/* =========================================================================
   Components — Buttons, Cards, Nav, Hero, Footer, ...
   ========================================================================= */

/* -------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-5);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--accent-text);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: var(--surface-raised);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--surface-raised);
}

.btn-lg {
  padding: var(--s-4) var(--s-6);
  font-size: var(--fs-md);
}

.btn-sm {
  padding: var(--s-2) var(--s-4);
  font-size: var(--fs-sm);
}

/* Link-Button mit Pfeil */
.btn-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--accent);
  font-weight: var(--fw-medium);
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.btn-link .arrow {
  transition: transform var(--transition);
}

.btn-link:hover .arrow {
  transform: translateX(4px);
}

/* -------------------------------------------------------------------------
   Tags / Pills
   ------------------------------------------------------------------------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-1) var(--s-3);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
}

.tag-accent {
  color: var(--accent);
  background: var(--accent-subtle);
  border-color: transparent;
}

/* -------------------------------------------------------------------------
   Nav
   ------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
  padding: var(--s-4) 0;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-weight: var(--fw-bold);
  font-size: var(--fs-md);
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-brand:hover { color: var(--text); }

.nav-brand .brand-mark {
  width: 30px;
  height: 30px;
  color: var(--text);
  flex-shrink: 0;
  transition: color var(--transition);
}

.nav-brand:hover .brand-mark {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  padding: var(--s-2) var(--s-3);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text);
  background: var(--surface-raised);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun  { display: block; }

.lang-switch {
  display: inline-flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
}

.lang-switch a {
  color: var(--text-muted);
  padding: 0.4rem 0.6rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.lang-switch a.is-active {
  background: var(--surface-raised);
  color: var(--text);
}

/* Mobile-Menu (einfach, ohne JS-Toggle für Prototype) */
@media (max-width: 860px) {
  .nav-links { display: none; }
}

/* -------------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------------- */

.hero {
  padding-top: clamp(var(--s-10), 8vw, var(--s-14));
  padding-bottom: clamp(var(--s-10), 8vw, var(--s-14));
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 60%;
  height: 120%;
  background: radial-gradient(circle at center,
              var(--accent-subtle) 0%,
              transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero > .container { position: relative; z-index: 1; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--s-5);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}

.hero-eyebrow::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 16px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(2.5rem, 6.5vw, var(--fs-5xl));
  letter-spacing: -0.03em;
  max-width: 16ch;
  margin-bottom: var(--s-6);
}

.hero-title .accent {
  background: linear-gradient(135deg, var(--accent), #7dffe8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(1.125rem, 1.6vw, 1.375rem);
  line-height: var(--lh-relaxed);
  color: var(--text-muted);
  max-width: 56ch;
  margin-bottom: var(--s-8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
}

/* -------------------------------------------------------------------------
   Section-Heading
   ------------------------------------------------------------------------- */

.section-heading {
  max-width: 48rem;
  margin-bottom: var(--s-10);
}

.section-heading h2 {
  margin-bottom: var(--s-4);
}

.section-heading p {
  font-size: var(--fs-lg);
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
}

/* -------------------------------------------------------------------------
   Grid-Layouts
   ------------------------------------------------------------------------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--s-6);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--s-6);
}

.grid-2-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-10);
  align-items: center;
}

@media (max-width: 860px) {
  .grid-2-split { grid-template-columns: 1fr; gap: var(--s-8); }
}

/* -------------------------------------------------------------------------
   Cards
   ------------------------------------------------------------------------- */

.card {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--s-6);
  transition: border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.card:hover {
  border-color: var(--border-strong);
}

.card-link {
  color: inherit;
  text-decoration: none;
  display: block;
}

.card-link:hover {
  color: inherit;
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: 0;
}

/* Service-Card */
.card-service {
  padding: var(--s-7);
  position: relative;
  overflow: hidden;
}

.card-service .service-meta {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-5);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card-service .service-meta .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-subtle);
}

.card-service h3 {
  font-size: var(--fs-2xl);
  margin-bottom: var(--s-3);
}

.card-service .service-sub {
  color: var(--text-muted);
  margin-bottom: var(--s-5);
}

.card-service ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--s-5) 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.card-service li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-2);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.card-service li::before {
  content: '';
  width: 16px;
  height: 16px;
  margin-top: 2px;
  flex-shrink: 0;
  background: var(--accent);
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center / contain no-repeat;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center / contain no-repeat;
}

.card-service .card-footer {
  margin-top: auto;
  padding-top: var(--s-4);
  border-top: 1px dashed var(--border);
}

/* Article-Card */
.card-article {
  padding: 0;
  overflow: hidden;
}

.card-article .article-meta {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-5) var(--s-5) 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.card-article h3 {
  padding: 0 var(--s-5);
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
}

.card-article p {
  padding: 0 var(--s-5);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.card-article .article-read {
  padding: var(--s-4) var(--s-5) var(--s-5);
  color: var(--accent);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}

/* Stat-Card */
.card-stat {
  padding: var(--s-6);
  text-align: left;
}

.card-stat .stat-number {
  font-family: var(--font-mono);
  font-size: var(--fs-4xl);
  font-weight: var(--fw-extrabold);
  line-height: 1;
  color: var(--text);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.card-stat .stat-label {
  margin-top: var(--s-3);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* -------------------------------------------------------------------------
   Problem-Columns (drei Spalten mit Icon)
   ------------------------------------------------------------------------- */

.problem-col {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.problem-col .problem-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--accent-subtle);
  color: var(--accent);
  margin-bottom: var(--s-2);
}

.problem-col h3 {
  font-size: var(--fs-xl);
  line-height: var(--lh-snug);
}

.problem-col p {
  color: var(--text-muted);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
}

/* -------------------------------------------------------------------------
   Manifesto-Quote
   ------------------------------------------------------------------------- */

.manifesto {
  position: relative;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--accent-subtle) 60%, transparent),
    color-mix(in srgb, var(--surface-raised) 80%, transparent));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--s-8), 6vw, var(--s-12));
  overflow: hidden;
}

.manifesto::before {
  content: '“';
  position: absolute;
  top: -3rem;
  left: 1rem;
  font-family: Georgia, serif;
  font-size: 16rem;
  color: var(--accent-subtle);
  line-height: 1;
  pointer-events: none;
}

.manifesto blockquote {
  margin: 0;
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  line-height: 1.3;
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 40ch;
}

.manifesto .cite {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-top: var(--s-6);
  color: var(--text-muted);
}

.manifesto .cite-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--depth);
  display: grid;
  place-items: center;
  color: var(--text);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
}

.manifesto .cite-name {
  color: var(--text);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
}

.manifesto .cite-role {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* -------------------------------------------------------------------------
   Logo-Strip / Affiliations
   ------------------------------------------------------------------------- */

.logo-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(var(--s-6), 5vw, var(--s-10));
  padding: var(--s-6) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.logo-strip .logo-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-subtle);
  width: 100%;
  text-align: center;
  margin-bottom: var(--s-3);
}

.logo-strip .logo-item {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.02em;
  color: var(--text-muted);
  opacity: 0.85;
  filter: grayscale(100%);
  transition: color var(--transition), opacity var(--transition);
}

.logo-strip .logo-item:hover {
  color: var(--text);
  opacity: 1;
}

/* -------------------------------------------------------------------------
   CTA-Banner
   ------------------------------------------------------------------------- */

.cta-banner {
  background: linear-gradient(135deg,
    var(--surface-raised),
    color-mix(in srgb, var(--accent) 12%, var(--surface-raised)));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--s-8), 6vw, var(--s-12));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 0%,
              var(--accent-subtle),
              transparent 50%);
  pointer-events: none;
}

.cta-banner > * { position: relative; z-index: 1; }

.cta-banner h2 {
  margin-bottom: var(--s-4);
  max-width: 18ch;
  margin-inline: auto;
}

.cta-banner p {
  margin: 0 auto var(--s-7);
  color: var(--text-muted);
  font-size: var(--fs-md);
  max-width: 52ch;
  line-height: var(--lh-relaxed);
}

.cta-banner .cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--s-3);
}

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */

.site-footer {
  margin-top: var(--s-16);
  padding: var(--s-12) 0 var(--s-8);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s-8);
  margin-bottom: var(--s-10);
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-about {
  max-width: 36ch;
}

.footer-about p {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  margin-top: var(--s-4);
}

.footer-col h4 {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-subtle);
  margin-bottom: var(--s-4);
  font-weight: var(--fw-semibold);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.footer-col a {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--text);
}

.footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-6);
  border-top: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  flex-wrap: wrap;
  gap: var(--s-4);
}

.footer-meta .kilo-link {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-meta .kilo-link:hover { color: var(--accent); }

/* -------------------------------------------------------------------------
   Assessment-Teaser (Lead-Magnet-Block)
   ------------------------------------------------------------------------- */

.assessment-teaser {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--s-6), 4vw, var(--s-8));
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--s-6);
}

@media (max-width: 720px) {
  .assessment-teaser { grid-template-columns: 1fr; }
}

.assessment-teaser h3 {
  font-size: var(--fs-xl);
  margin-bottom: var(--s-2);
}

.assessment-teaser p {
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* -------------------------------------------------------------------------
   FAQ Accordion (für Service-Seiten)
   ------------------------------------------------------------------------- */

.faq {
  max-width: var(--prose-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-raised);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq details[open] {
  border-color: var(--border-strong);
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: var(--s-4) var(--s-5);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-4);
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq details[open] summary::after {
  content: '−';
  color: var(--accent);
}

.faq .faq-body {
  padding: 0 var(--s-5) var(--s-5);
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
}

/* -------------------------------------------------------------------------
   Process-Timeline (Phasen)
   ------------------------------------------------------------------------- */

.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: var(--s-5);
  align-items: flex-start;
}

.timeline-marker {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-raised);
  border: 2px solid var(--accent);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: var(--fw-bold);
  color: var(--accent);
  position: relative;
  z-index: 1;
}

.timeline-content h4 {
  margin-bottom: var(--s-2);
}

.timeline-content p {
  color: var(--text-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
}

.timeline-duration {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--s-1);
}

/* -------------------------------------------------------------------------
   Code-Accent-Block (Hero-rechts-Panel für Split-Hero)
   ------------------------------------------------------------------------- */

.code-panel {
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--s-5);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.7;
  box-shadow: var(--shadow);
}

.code-panel .code-header {
  display: flex;
  gap: var(--s-2);
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--border);
}

.code-panel .code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-subtle);
}

.code-panel .code-title {
  margin-left: auto;
  font-size: var(--fs-xs);
  color: var(--text-subtle);
  text-transform: lowercase;
}

.code-panel .line-prompt { color: var(--accent); }
.code-panel .line-output { color: var(--text-muted); }
.code-panel .line-comment { color: var(--text-subtle); }