/* =====================================================
   AI Evolve – Gemeinsames Stylesheet
   ===================================================== */

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

:root {
  --cyan:       #00D4FF;
  --magenta:    #FF1493;
  --dark-bg:    #1A1A2E;
  --dark-bg2:   #16213E;
  --white:      #FFFFFF;
  --light-gray: #F5F7FA;
  --text:       #2D2D2D;
  --text-light: rgba(255,255,255,0.80);
  --border:     rgba(0,212,255,0.20);
  --shadow:     0 8px 32px rgba(0,0,0,0.15);
  --radius:     12px;
  --font:       'Inter', 'Open Sans', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a  { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Typography ── */
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; font-weight: 700; }
p  { margin-bottom: 1rem; }

/* ── Layout ── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 80px 0; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--cyan);
  color: var(--dark-bg);
  border-color: var(--cyan);
}
.btn-primary:hover {
  background: #00BFEA;
  border-color: #00BFEA;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,212,255,0.35);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-lg { padding: 17px 36px; font-size: 1.1rem; }

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge-magenta { background: var(--magenta); color: white; }
.badge-cyan    { background: var(--cyan);    color: var(--dark-bg); }
.badge-outline { border: 1px solid var(--cyan); color: var(--cyan); background: transparent; }

/* ── Navigation ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo-icon {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: white;
}
.nav-logo-text span:first-child { color: white; }
.nav-logo-text span:last-child  { color: white; }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.80);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 0.2s;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.nav-cta { display: none; }

/* Mobile menu */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s;
}

/* ── Hero ── */
.hero {
  background: var(--dark-bg);
  padding: 100px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(0,212,255,0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 30% 80%, rgba(255,20,147,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content { position: relative; max-width: 720px; }
.hero-eyebrow {
  display: inline-block;
  color: var(--cyan);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero h1 { color: var(--white); margin-bottom: 22px; }
.hero h1 span { color: var(--cyan); }
.hero-sub {
  color: var(--text-light);
  font-size: 1.15rem;
  margin-bottom: 36px;
  max-width: 600px;
}
.hero-buttons { display: flex; flex-wrap: wrap; gap: 14px; }

/* ── Section headings ── */
.section-heading {
  text-align: center;
  margin-bottom: 56px;
}
.section-heading h2 { margin-bottom: 14px; }
.section-heading p {
  color: #666;
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}
.section-heading.light h2 { color: white; }
.section-heading.light p  { color: rgba(255,255,255,0.65); }

/* ── Cards ── */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.12);
}
.card-body { padding: 28px; }

/* ── 3-col grid ── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* ── Icon card ── */
.icon-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid rgba(0,0,0,0.07);
  transition: all 0.25s;
}
.icon-card:hover { border-color: var(--cyan); box-shadow: 0 8px 32px rgba(0,212,255,0.10); }
.icon-card .icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 14px;
  background: rgba(0,212,255,0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
}
.icon-card h3 { margin-bottom: 8px; font-size: 1rem; }
.icon-card p  { font-size: 0.92rem; color: #666; margin: 0; }

/* ── Steps ── */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 36px; position: relative; }
.step { text-align: center; padding: 8px; }
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--cyan);
  color: var(--dark-bg);
  font-size: 1.4rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.step h3 { color: white; margin-bottom: 10px; font-size: 1.05rem; }
.step p   { color: rgba(255,255,255,0.70); font-size: 0.92rem; margin: 0; }

/* ── Stats ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
  text-align: center;
}
.stat-num {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 0.88rem;
  color: #666;
  line-height: 1.4;
}

/* ── Optin / CTA section ── */
.optin-section {
  background: var(--dark-bg);
  position: relative;
  overflow: hidden;
}
.optin-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(0,212,255,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.optin-box { position: relative; max-width: 600px; margin: 0 auto; text-align: center; }
.optin-box h2 { color: white; margin-bottom: 14px; }
.optin-box .sub { color: rgba(255,255,255,0.70); font-size: 1rem; margin-bottom: 32px; }
.optin-form { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.optin-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: 14px 18px;
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  color: white;
  font-size: 1rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
}
.optin-form input[type="email"]::placeholder { color: rgba(255,255,255,0.40); }
.optin-form input[type="email"]:focus { border-color: var(--cyan); }
.optin-fine {
  margin-top: 14px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.40);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ── Feature split ── */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-split.reverse { direction: rtl; }
.feature-split.reverse > * { direction: ltr; }

.feature-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.feature-img-placeholder {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-bg2) 100%);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  border: 1px solid var(--border);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
}
.feature-img-placeholder span { font-size: 4rem; }
.feature-img-placeholder p {
  color: rgba(255,255,255,0.50);
  font-size: 0.88rem;
  margin: 0;
}

.feature-text .badge { margin-bottom: 18px; }
.feature-text h2 { margin-bottom: 16px; }
.feature-text .desc { color: #555; margin-bottom: 24px; font-size: 0.97rem; }
.feature-bullets { list-style: none; margin-bottom: 28px; }
.feature-bullets li {
  padding: 7px 0;
  padding-left: 28px;
  position: relative;
  font-size: 0.94rem;
  color: var(--text);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.feature-bullets li:last-child { border-bottom: none; }
.feature-bullets li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 900;
}

/* ── Quote / Mission ── */
.mission-block {
  background: var(--dark-bg);
  padding: 90px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.mission-block::before {
  content: '"';
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 22rem;
  color: rgba(0,212,255,0.04);
  font-family: Georgia, serif;
  pointer-events: none;
  line-height: 1;
}
.mission-quote {
  max-width: 800px;
  margin: 0 auto;
  font-size: clamp(1.2rem, 2.5vw, 1.55rem);
  font-weight: 600;
  color: white;
  line-height: 1.55;
  position: relative;
}
.mission-quote em { color: var(--cyan); font-style: normal; }

/* ── Contact form ── */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 7px;
  color: var(--text);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.97rem;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--cyan); }
.form-group textarea { resize: vertical; min-height: 140px; }
.form-note {
  text-align: center;
  margin-top: 16px;
  font-size: 0.84rem;
  color: #888;
}
.form-note a { color: var(--cyan); }

/* ── Footer ── */
footer {
  background: var(--dark-bg);
  color: rgba(255,255,255,0.70);
  padding: 60px 0 24px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-col h4 {
  color: white;
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: rgba(255,255,255,0.60);
  font-size: 0.92rem;
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--cyan); }
.footer-social { display: flex; gap: 12px; margin-top: 4px; }
.social-link {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  text-decoration: none;
  transition: all 0.2s;
  color: rgba(255,255,255,0.70);
}
.social-link:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,212,255,0.08); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}
.footer-brand { display: flex; align-items: center; gap: 8px; }
.footer-brand svg { width: 28px; height: 28px; }

/* ── Divider ── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.3), transparent);
  margin: 0;
}

/* ── Article page ── */
.article-hero {
  background: var(--dark-bg);
  padding: 100px 0 50px;
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(0,212,255,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 30% 80%, rgba(255,20,147,0.04) 0%, transparent 60%);
  pointer-events: none;
}
.article-hero .container { position: relative; }
.breadcrumb {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255,255,255,0.55); }
.breadcrumb a:hover { color: var(--cyan); }
.article-hero h1 { color: white; max-width: 720px; margin-bottom: 18px; font-size: clamp(1.6rem, 4vw, 2.4rem); }
.article-meta {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
}
.article-meta .badge { font-size: 0.7rem; }

.article-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 40px;
}
.article-content h2 {
  font-size: 1.4rem;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(0,0,0,0.06);
}
.article-content h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.article-content h3 { font-size: 1.05rem; margin-top: 28px; margin-bottom: 10px; }
.article-content p { font-size: 0.97rem; color: #444; line-height: 1.8; }
.article-content strong { color: var(--text); }
.article-content ul, .article-content ol {
  margin: 16px 0;
  padding-left: 24px;
}
.article-content li {
  font-size: 0.95rem;
  color: #444;
  line-height: 1.7;
  margin-bottom: 8px;
}
.article-content blockquote {
  background: var(--light-gray);
  border-left: 4px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 28px;
  margin: 28px 0;
}
.article-content blockquote p { margin-bottom: 6px; font-size: 0.92rem; }
.article-content blockquote p:last-child { margin-bottom: 0; }

.article-faq { margin-top: 48px; }
.article-faq h2 { border-top: none; }
.faq-block { margin-bottom: 16px; }
.faq-block summary {
  font-size: 0.93rem;
  font-weight: 600;
  cursor: pointer;
  padding: 14px 18px;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,0.08);
  list-style: none;
  background: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.2s;
}
.faq-block summary::-webkit-details-marker { display: none; }
.faq-block summary::after { content: '+'; color: var(--cyan); font-size: 1.3rem; font-weight: 400; }
.faq-block[open] summary::after { content: '\2212'; }
.faq-block[open] summary { border-color: var(--cyan); color: var(--cyan); }
.faq-block .faq-answer {
  padding: 14px 18px;
  font-size: 0.9rem;
  color: #555;
  line-height: 1.7;
}

.article-sources {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid rgba(0,0,0,0.08);
}
.article-sources h2 { border-top: none !important; padding-top: 0 !important; margin-top: 0 !important; font-size: 1.1rem; }
.article-sources ol { counter-reset: source; list-style: none; padding-left: 0; }
.article-sources li {
  counter-increment: source;
  font-size: 0.82rem;
  color: #888;
  padding: 6px 0;
  padding-left: 28px;
  position: relative;
}
.article-sources li::before {
  content: '[' counter(source) ']';
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 600;
}
.article-sources a { color: #888; text-decoration: underline; }
.article-sources a:hover { color: var(--cyan); }

.article-cta-box {
  background: var(--light-gray);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 48px;
  border-left: 4px solid var(--cyan);
}
.article-cta-box p { margin-bottom: 16px; }
.article-cta-box p:last-child { margin-bottom: 0; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .grid-3, .steps, .stats-grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .feature-split { grid-template-columns: 1fr; gap: 36px; }
  .feature-split.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  section { padding: 56px 0; }
  .hero { padding: 72px 0 60px; }
  .grid-3, .steps, .stats-grid, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .optin-form { flex-direction: column; }
  .optin-form input[type="email"] { min-width: 100%; }
}