/* back2future — Website Entwurf (draft)
   Page styles. Foundations imported from ../colors_and_type.css */
@import url("./colors_and_type.css");

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg-deep);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: var(--container); margin: 0 auto; padding-inline: var(--gutter); }
section { position: relative; }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-sans); font-size: 1rem; font-weight: 600;
  padding: .9rem 1.6rem; border-radius: var(--radius-pill);
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast);
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--color-accent); color: var(--color-on-accent); box-shadow: var(--glow-cta); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 44px var(--glow-cyan); }
.btn-primary:active { transform: translateY(0); }
.btn-green { background: var(--color-green); color: #04241a; box-shadow: var(--glow-green-cta); }
.btn-green:hover { transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--color-text); border-color: rgba(255,255,255,.22); }
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------------- Eyebrow ---------------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: var(--fs-eyebrow); font-weight: 600; text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow); color: var(--color-accent);
  margin-bottom: 1rem;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--grad-neon); border-radius: 2px; }

/* ---------------- Nav ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,15,26,.72); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.nav-logo { height: 34px; width: auto; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { font-size: .95rem; color: var(--color-muted); font-weight: 500; transition: color var(--dur-fast); }
.nav-links a:hover { color: var(--color-text); }
.nav-cta { display: flex; gap: .75rem; align-items: center; }
@media (max-width: 900px) { .nav-links { display: none; } }

/* ---------------- Hero ---------------- */
.hero { padding: clamp(48px,8vh,96px) 0 clamp(60px,10vh,120px); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(60% 50% at 78% 30%, rgba(0,209,255,.16), transparent 70%),
    radial-gradient(70% 60% at 20% 90%, rgba(15,191,135,.14), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px,5vw,72px);
  align-items: center;
}
.hero h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2.4rem,4.6vw,3.6rem); line-height: 1.08; letter-spacing: -.02em; }
.hero h1 .grad { background: var(--grad-neon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: var(--fs-lead); color: var(--color-muted); line-height: 1.6; margin-top: 1.4rem; max-width: 36ch; }
.hero-actions { display: flex; gap: 1rem; margin-top: 2.2rem; flex-wrap: wrap; }
.hero-sub { margin-top: 2.4rem; font-size: .98rem; color: var(--color-muted); line-height: 1.6; max-width: 44ch; padding-top: 1.6rem; border-top: 1px solid rgba(255,255,255,.08); }

.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-visual .device {
  border-radius: 26px; overflow: hidden; box-shadow: var(--shadow-card);
  border: 1px solid rgba(255,255,255,.1);
  transform: rotate(2deg);
}
.hero-visual .glow-ring {
  position: absolute; inset: -8% -4%; z-index: -1;
  background: var(--grad-bg-glow); filter: blur(8px);
}

/* ---------------- Key points (3) ---------------- */
.keypoints { padding: clamp(40px,7vh,80px) 0; }
.keypoints-head { max-width: 760px; margin-bottom: 3rem; }
.keypoints-head p { margin-top: 1.1rem; }
.kp-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.kp {
  background: linear-gradient(180deg, var(--color-surface), rgba(18,24,41,.6));
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 2rem 1.8rem; transition: border-color var(--dur), transform var(--dur);
}
.kp:hover { border-color: rgba(0,209,255,.45); transform: translateY(-4px); }
.kp-ic {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(0,209,255,.12); color: var(--color-accent); margin-bottom: 1.2rem;
}
.kp-ic svg { width: 26px; height: 26px; }
.kp h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; margin-bottom: .5rem; }
.kp p { color: var(--color-muted); font-size: .98rem; line-height: 1.55; }
@media (max-width: 860px) { .kp-grid { grid-template-columns: 1fr; } }

/* ---------------- Customer Journey ---------------- */
.journey { padding: clamp(50px,8vh,100px) 0; background: var(--color-bg); }
.journey-head { text-align: center; max-width: 720px; margin: 0 auto 4rem; }
.step {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px,6vw,90px);
  align-items: center; margin-bottom: 5.5rem;
}
.step:last-child { margin-bottom: 0; }
.step:nth-child(even) .step-media { order: -1; }
.step-num { font-family: var(--font-display); font-weight: 800; font-size: 3.2rem; line-height: 1;
  background: var(--grad-neon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.step-text h3 { font-family: var(--font-display); font-size: 1.85rem; font-weight: 700; margin: .6rem 0 1rem; letter-spacing: -.01em; }
.step-text p { color: var(--color-muted); font-size: var(--fs-lead); line-height: 1.6; max-width: 44ch; }
.step-media { position: relative; display: flex; justify-content: center; }
.step-media .frame {
  border-radius: 22px; overflow: hidden; border: 1px solid rgba(255,255,255,.1);
  box-shadow: var(--shadow-card); background: #0a0e18;
}
.step-media::after {
  content: ""; position: absolute; inset: 8% 12%; z-index: -1; border-radius: 40px;
  background: var(--grad-bg-glow); filter: blur(14px);
}
@media (max-width: 860px) {
  .step { grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 4rem; }
  .step:nth-child(even) .step-media { order: 0; }
}

/* ---------------- Benefits (Warum) ---------------- */
.benefits { padding: clamp(50px,8vh,100px) 0; }
.benefits-head { max-width: 680px; margin-bottom: 3.4rem; }
.ben-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.3rem; }
.ben {
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 1.8rem; background: rgba(18,24,41,.5);
  transition: border-color var(--dur), background var(--dur);
}
.ben:hover { border-color: rgba(15,191,135,.5); background: rgba(18,24,41,.85); }
.ben-ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  color: var(--color-accent-2); background: rgba(0,245,176,.1); margin-bottom: 1.1rem; }
.ben-ic svg { width: 22px; height: 22px; }
.ben h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; margin-bottom: .5rem; }
.ben p { color: var(--color-muted); font-size: .95rem; line-height: 1.55; }
@media (max-width: 860px) { .ben-grid { grid-template-columns: 1fr; } }

/* ---------------- Use cases (Anwendungsgebiete) ---------------- */
.usecases { padding: clamp(50px,8vh,100px) 0; background: var(--color-bg); }
.uc-head { text-align: center; max-width: 720px; margin: 0 auto 3.4rem; }
.uc-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.3rem; }
.uc {
  position: relative; border-radius: var(--radius-lg); padding: 2rem 1.8rem 1.8rem;
  background: linear-gradient(165deg, rgba(82,107,166,.16), rgba(18,24,41,.4));
  border: 1px solid var(--color-border); overflow: hidden;
  transition: transform var(--dur), border-color var(--dur);
}
.uc:hover { transform: translateY(-5px); border-color: rgba(0,209,255,.45); }
.uc::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad-neon); opacity: .8; }
.uc-ic { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  color: var(--color-accent); background: rgba(0,209,255,.12); margin-bottom: 1.4rem; }
.uc-ic svg { width: 28px; height: 28px; }
.uc h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; margin-bottom: .55rem; }
.uc p { color: var(--color-muted); font-size: .98rem; line-height: 1.55; margin-bottom: 1.2rem; }
.uc-link { font-size: .9rem; font-weight: 600; color: var(--color-accent); display: inline-flex; align-items: center; gap: .35rem; }
.uc-link svg { width: 16px; height: 16px; transition: transform var(--dur-fast); }
.uc:hover .uc-link svg { transform: translateX(4px); }
@media (max-width: 860px) { .uc-grid { grid-template-columns: 1fr; } }

/* ---------------- About (Zwei Welten) ---------------- */
.about { padding: clamp(56px,9vh,110px) 0; position: relative; overflow: hidden; }
.about::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 80% at 85% 20%, rgba(82,107,166,.18), transparent 70%); }
.about-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px,6vw,80px); align-items: center; }
.about-text h2 { margin-bottom: 1.4rem; }
.about-text p { color: var(--color-muted); font-size: var(--fs-lead); line-height: 1.7; margin-bottom: 1.2rem; }
.about-badge { display: inline-flex; align-items: center; gap: .7rem; margin-top: 1rem;
  padding: .7rem 1.1rem; border-radius: var(--radius-pill); background: rgba(255,255,255,.04);
  border: 1px solid var(--color-border); font-size: .92rem; color: var(--color-muted); }
.about-badge strong { color: var(--color-text); font-weight: 600; }
.about-visual { display: flex; justify-content: center; }
.about-visual img { width: min(360px,80%); filter: drop-shadow(0 20px 50px rgba(0,209,255,.2)); }
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } .about-visual { order: -1; } }

/* ---------------- Contact CTA ---------------- */
.cta { padding: clamp(40px,7vh,90px) 0; }
.cta-panel {
  position: relative; overflow: hidden;
  border-radius: var(--radius-xl); padding: clamp(40px,6vw,72px);
  background: linear-gradient(135deg, var(--blue-700), var(--ink-900));
  border: 1px solid rgba(0,209,255,.25);
  text-align: center;
}
.cta-panel::before { content: ""; position: absolute; inset: 0; background: var(--grad-bg-glow); }
.cta-panel > * { position: relative; z-index: 1; }
.cta-panel h2 { margin: 0 auto 1.2rem; max-width: 22ch; }
.cta-panel p { color: var(--color-muted); font-size: var(--fs-lead); max-width: 50ch; margin: 0 auto 2.2rem; line-height: 1.6; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---------------- Footer ---------------- */
.footer { padding: 3.5rem 0 2.5rem; border-top: 1px solid rgba(255,255,255,.06); }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 2rem; flex-wrap: wrap; }
.footer-logo { height: 30px; margin-bottom: 1rem; }
.footer-col h4 { font-family: var(--font-display); font-size: .95rem; color: var(--color-text); margin-bottom: .9rem; font-weight: 600; }
.footer-col a { display: block; color: var(--color-muted); font-size: .92rem; margin-bottom: .55rem; transition: color var(--dur-fast); }
.footer-col a:hover { color: var(--color-accent); }
.footer-tag { color: var(--color-muted); font-size: .92rem; max-width: 30ch; line-height: 1.6; }
.footer-bottom { margin-top: 2.5rem; padding-top: 1.6rem; border-top: 1px solid rgba(255,255,255,.06);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; color: var(--color-muted); font-size: .85rem; }

/* ---------------- Reveal animation ---------------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .reveal.in { opacity: 1; transform: none; }
}