/* =====================
   FDG - Fiber Destination Germany
   Dark blue glasvezel design
   ===================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #3b82f6;
  --blue-dark: #1d4ed8;
  --bg-dark: #0a0f1e;
  --bg-dark2: #0d1526;
  --bg-light: #0f172a;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(59,130,246,0.2);
  --card-bg: rgba(255,255,255,0.04);
  --card-hover: rgba(59,130,246,0.08);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- NAVBAR ---- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,15,30,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
}
.logo-text { font-size: 1.1rem; font-weight: 700; letter-spacing: 0.5px; }
.logo-sub { color: var(--text-muted); font-weight: 400; font-size: 0.85rem; }
.nav-links { display: flex; gap: 32px; }
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-link:hover { color: var(--blue); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-select {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
}
.btn-contact {
  background: var(--blue);
  color: #fff;
  padding: 8px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.1s;
}
.btn-contact:hover { background: var(--blue-dark); transform: translateY(-1px); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* ---- HERO ---- */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 40%, #0d1f4a 0%, #0a0f1e 70%);
}
#starCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 100px 24px 80px;
  max-width: 900px;
}
.hero-subtitle {
  color: var(--blue);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 36px;
  background: linear-gradient(135deg, #fff 0%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59,130,246,0.35);
}
.btn-secondary {
  background: rgba(59,130,246,0.12);
  color: var(--blue);
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid rgba(59,130,246,0.3);
  transition: background 0.2s, transform 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-secondary:hover { background: rgba(59,130,246,0.2); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- SECTIONS ---- */
.section-dark { background: var(--bg-dark); padding: 96px 0; }
.section-light { background: var(--bg-light); padding: 96px 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #fff 0%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-sub {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 56px;
  max-width: 600px;
}
.sub-heading {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 48px 0 24px;
  color: var(--text);
}

/* ---- SERVICES GRID ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 20px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.service-card:hover {
  background: var(--card-hover);
  border-color: var(--blue);
  transform: translateY(-4px);
}
.service-icon { margin-bottom: 16px; }
.service-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.card-link {
  font-size: 0.8rem;
  color: var(--blue);
  font-weight: 500;
}

/* ---- ABOUT ---- */
.about-intro {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 700px;
  margin-bottom: 8px;
}
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 8px;
}
.cert-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.cert-icon { margin-bottom: 12px; }
.cert-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 8px; }
.cert-card p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.values-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 40px;
}
.value-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.value-item svg { flex-shrink: 0; margin-top: 2px; }
.fdh-banner {
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 12px;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.fdh-banner p { color: var(--text-muted); font-size: 0.9rem; }
.fdh-link {
  color: var(--blue);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}
.fdh-link:hover { text-decoration: underline; }

/* ---- TESTIMONIALS ---- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.testimonial-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.testimonial-card:hover { border-color: var(--blue); transform: translateY(-4px); }
.t-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.t-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.t-k { background: #2563eb; }
.t-p { background: #16a34a; }
.t-m { background: #9333ea; }
.t-header strong { display: block; font-size: 0.95rem; }
.t-header span { font-size: 0.8rem; color: var(--text-muted); }
.testimonial-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; }
.stars { color: #fbbf24; font-size: 1rem; letter-spacing: 2px; }

/* ---- CONTACT ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.contact-item svg { flex-shrink: 0; margin-top: 3px; }
.contact-item strong { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; }
.contact-item a, .contact-item span {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  display: block;
}
.contact-item a:hover { color: var(--blue); }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form input,
.contact-form textarea {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.2s;
  width: 100%;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue);
}
.contact-form textarea { resize: vertical; }
.form-success {
  background: rgba(34,197,94,0.15);
  border: 1px solid rgba(34,197,94,0.3);
  color: #86efac;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
}

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.faq-q {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: left;
  gap: 12px;
  transition: color 0.2s;
}
.faq-q:hover { color: var(--blue); }
.faq-q svg { flex-shrink: 0; transition: transform 0.3s; }
.faq-q.open svg { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s;
}
.faq-a.open { max-height: 300px; padding: 0 20px 18px; }
.faq-a p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
.faq-cta { text-align: center; }
.faq-cta p { color: var(--text-muted); margin-bottom: 16px; }

/* ---- FOOTER ---- */
#footer {
  background: #060b18;
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; margin-top: 12px; max-width: 260px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { font-size: 0.85rem; font-weight: 600; color: var(--text); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-links a, .footer-links span {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--blue); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.8rem; }
.fdh-footer { color: var(--text-muted); font-size: 0.8rem; text-decoration: none; }
.fdh-footer:hover { color: var(--blue); }

/* ---- MODAL ---- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal-overlay.active { display: flex; }
.modal-box {
  background: #0d1526;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  max-width: 560px;
  width: 100%;
  position: relative;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.modal-close:hover { color: var(--text); background: rgba(255,255,255,0.08); }
#modalContent h3 { font-size: 1.3rem; margin-bottom: 12px; color: var(--blue); }
#modalContent p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: rgba(10,15,30,0.98); padding: 20px 24px; border-bottom: 1px solid var(--border); gap: 16px; }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 32px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr 1fr; }
}