/* =============================================================
   Bit2atom — main.css
   Swiss Minimalism × Lusion-inspired motion. Mobile-first.
   ============================================================= */

/* ---------- Design Tokens ---------- */
:root {
  /* Palette */
  --bg:        #0b0b0e;
  --bg-elev:  #111116;
  --fg:        #e8e8ec;
  --fg-muted:  rgba(232, 232, 236, 0.58);
  --fg-faint:  rgba(232, 232, 236, 0.22);
  --line:      rgba(232, 232, 236, 0.10);
  --accent:    #2f7d4f;
  --accent-2:  #4ade80;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Inter, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;

  --fs-eyebrow:  clamp(0.72rem, 0.7vw + 0.6rem, 0.82rem);
  --fs-body:     clamp(1rem, 0.4vw + 0.92rem, 1.125rem);
  --fs-lead:     clamp(1.15rem, 0.8vw + 1rem, 1.5rem);
  --fs-h3:       clamp(1.5rem, 1.6vw + 1rem, 2.25rem);
  --fs-h2:       clamp(2rem, 3.5vw + 1rem, 4rem);
  --fs-display:  clamp(3rem, 11vw + 0.5rem, 14rem);

  /* Spacing */
  --pad-x:    clamp(1.25rem, 4vw, 3rem);
  --gap-s:    clamp(0.75rem, 1vw, 1rem);
  --gap-m:    clamp(1.25rem, 2vw, 2rem);
  --gap-l:    clamp(2rem, 4vw, 4rem);
  --gap-xl:   clamp(4rem, 8vw, 8rem);

  /* Motion */
  --ease:     cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur:      0.6s;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 300;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg, video, canvas, iframe { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

/* ---------- Focus ---------- */
:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff;
  padding: 0.75rem 1rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Custom Cursor (Zeichen / Pfeil-Symbol) ---------- */
.cursor {
  position: fixed; top: 0; left: 0;
  width: 26px; height: 26px;
  pointer-events: none;
  z-index: 1000;
  transform: translate3d(-100px, -100px, 0);
  transition: width 0.3s var(--ease), height 0.3s var(--ease), opacity 0.3s var(--ease);
  will-change: transform;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M3 2 L3 20 L8 15 L11 22 L14 21 L11 14 L18 14 Z' fill='%234ade80' stroke='%230b0b0e' stroke-width='1.2' stroke-linejoin='round'/></svg>");
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.6));
}
.cursor.is-hover { width: 40px; height: 40px; }
.cursor.is-hidden { opacity: 0; }
@media (hover: none), (prefers-reduced-motion: reduce) { .cursor { display: none; } }
@media (hover: hover) and (pointer: fine) {
  body { cursor: none; }
  body a, body button, body input, body textarea,
  body summary, body .lang-trigger, body .lang-option { cursor: none; }
}

/* ---------- Layout helpers ---------- */
.shell { width: 100%; max-width: 1600px; margin: 0 auto; padding-inline: var(--pad-x); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  display: inline-flex; align-items: center; gap: 0.6rem;
}
.eyebrow::before {
  content: ""; width: 24px; height: 1px; background: var(--fg-muted);
}

/* ---------- Site Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0;
  z-index: 50;
  padding: clamp(0.5rem, 1vw, 0.75rem) var(--pad-x);
  display: flex; justify-content: space-between; align-items: center;
  background: linear-gradient(to bottom, rgba(11,11,14,0.85), rgba(11,11,14,0));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.logo {
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.92rem;
}
.logo span { color: var(--accent-2); }

.nav { display: flex; gap: clamp(1.25rem, 2.5vw, 2.5rem); align-items: center; }
.nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  position: relative;
  padding: 0.4rem 0;
  transition: color 0.3s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--accent-2);
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.4s var(--ease-out);
}
.nav a:hover { color: var(--fg); }
.nav a:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- Language switcher (select) ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden; white-space: nowrap;
}
.lang-switch {
  position: relative;
  padding-left: clamp(0.5rem, 1.5vw, 1rem);
  margin-left: clamp(0.25rem, 1vw, 0.75rem);
  border-left: 1px solid var(--line);
}
.lang-trigger {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--fg);
  background: rgba(232, 232, 236, 0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}
.lang-trigger::-webkit-details-marker { display: none; }
.lang-ico { width: 15px; height: 15px; flex: none; color: var(--accent-2); }
.lang-trigger::after {
  content: "";
  width: 0.42em;
  height: 0.42em;
  margin-left: 0.1rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.3s var(--ease);
}
.lang-trigger:hover { border-color: rgba(74, 222, 128, 0.5); background: rgba(232, 232, 236, 0.07); }
.lang-switch[open] .lang-trigger { border-color: var(--accent-2); }
.lang-switch[open] .lang-trigger::after { transform: translateY(1px) rotate(-135deg); }

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.6rem);
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  min-width: 11rem;
  background: var(--bg-elev);
  border: 1px solid rgba(232, 232, 236, 0.14);
  border-radius: 12px;
  display: grid;
  gap: 0.1rem;
  z-index: 60;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.55);
}
.lang-menu::before {
  content: "";
  position: absolute;
  right: 1.4rem;
  top: -5px;
  width: 9px;
  height: 9px;
  background: var(--bg-elev);
  border-left: 1px solid rgba(232, 232, 236, 0.14);
  border-top: 1px solid rgba(232, 232, 236, 0.14);
  transform: rotate(45deg);
}
.lang-option {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--fg-muted);
  background: transparent;
  border: 0;
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.lang-option:hover,
.lang-option:focus-visible {
  color: var(--fg);
  background: rgba(74, 222, 128, 0.1);
  outline: none;
}
.lang-option.is-active { color: var(--accent-2); }
.lang-option.is-active::after { content: "\2713"; font-size: 0.9em; }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  position: absolute; left: 8px; right: 8px; height: 1px;
  background: var(--fg);
  transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 24px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { top: 19px; transform: rotate(-45deg); }

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 0;
    background: #0b0b0e;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    transform: translateY(-100%);
    transition: transform 0.5s var(--ease);
  }
  .nav a { font-size: 1.5rem; }
  .nav.is-open { transform: translateY(0); }
  .lang-switch {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    margin-left: 0;
    padding-top: 1.5rem;
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .lang-trigger { font-size: 0.95rem; padding: 0.6rem 1.1rem; }
  .lang-menu {
    position: static;
    margin-top: 1rem;
    box-shadow: none;
    min-width: 14rem;
  }
  .lang-menu::before { display: none; }
  .lang-option { font-size: 1rem; padding: 0.75rem 0.9rem; }
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  padding-top: clamp(5rem, 6vh, 8rem);
  padding-bottom: var(--gap-xl);
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  row-gap: var(--gap-m);
  position: relative;
  isolation: isolate;
}
.hero__meta {
  display: flex; justify-content: space-between; gap: 1rem;
  flex-wrap: wrap;
  grid-column: 1; grid-row: 1;
  position: relative; z-index: 1;
}
.hero__copy { display: flex; flex-direction: column; justify-content: center; grid-row: 2; }

/* Canvas: Mobil als dezenter Hintergrund hinter dem Copy-Block */
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  pointer-events: none;
  opacity: 0.18;
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 55%, #000 55%, transparent 100%);
          mask-image: radial-gradient(ellipse 75% 65% at 50% 55%, #000 55%, transparent 100%);
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    grid-template-rows: auto 1fr auto;
    column-gap: var(--gap-l);
  }
  .hero__meta {
    grid-column: 1 / -1;
    grid-row: 1;
  }
  .hero__copy {
    grid-column: 1;
    grid-row: 2;
    justify-content: center;
    align-self: center;
  }
  .hero__canvas {
    position: relative;
    inset: auto;
    grid-column: 2;
    grid-row: 2;
    width: 100%;
    height: 100%;
    min-height: 60vh;
    opacity: 1;
    -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, #000 65%, transparent 100%);
            mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, #000 65%, transparent 100%);
  }
  .hero__foot {
    grid-column: 1 / -1;
    grid-row: 3;
  }
}

/* Ensure hero copy & foot sit above the (mobile) canvas */
.hero__copy, .hero__foot { position: relative; z-index: 1; }

.hero__title {
  font-size: var(--fs-display);
  font-weight: 200;
  letter-spacing: -0.04em;
  line-height: 0.88;
  margin: 0;
  color: var(--fg);
  /* subtle dark backdrop so headline stays legible over canvas */
  text-shadow: 0 2px 40px rgba(11, 11, 14, 0.55);
  mix-blend-mode: normal;
}
.hero__title em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent-2);
}
.hero__title .word { display: inline-block; overflow: hidden; }
.hero__title .word span {
  display: inline-block;
  transform: translateY(110%);
  animation: rise 1s var(--ease-out) forwards;
}
.hero__title .word:nth-child(2) span { animation-delay: 0.15s; }
.hero__title .word:nth-child(3) span { animation-delay: 0.3s; }

@keyframes rise { to { transform: translateY(0); } }

.hero__foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-l);
  margin-top: var(--gap-l);
  align-items: end;
}
@media (min-width: 900px) {
  .hero__foot { display: flex; flex-wrap: wrap; align-items: flex-end; gap: var(--gap-m); }
}
.hero__lead {
  font-size: var(--fs-lead);
  font-weight: 300;
  color: var(--fg-muted);
  max-width: 52ch;
  margin: 0;
}
.hero__lead strong { color: var(--fg); font-weight: 400; }

/* Legacy iframe visual removed — canvas is now full-bleed hero background */

/* ---------- CTA Button ---------- */
.btn {
  --size: clamp(7rem, 10vw, 9rem);
  position: relative;
  display: inline-flex;
  align-items: center; justify-content: center;
  width: var(--size); height: var(--size);
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: background 0.4s var(--ease), transform 0.4s var(--ease);
  will-change: transform;
}
.btn:hover { background: var(--accent-2); color: var(--bg); }
.btn svg { width: 18px; height: 18px; margin-left: 6px; }

/* ---------- Section base ---------- */
.section {
  padding-block: var(--gap-xl);
  border-top: 1px solid var(--line);
}
.section__head {
  display: grid; grid-template-columns: 1fr; gap: var(--gap-m);
  margin-bottom: var(--gap-l);
}
@media (min-width: 900px) {
  .section__head { grid-template-columns: 1fr 2fr; align-items: end; }
}
.section__title {
  font-size: var(--fs-h2);
  font-weight: 200;
  letter-spacing: -0.025em;
  line-height: 1;
  margin: 0;
  color: var(--fg);
}
.section__title em { font-style: italic; color: var(--accent-2); font-weight: 300; }
.section__lead {
  font-size: var(--fs-lead);
  color: var(--fg-muted);
  max-width: 52ch;
  margin: 0;
}

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }

/* ---------- Services ---------- */
.services { display: grid; gap: var(--gap-m); grid-template-columns: 1fr; }
@media (min-width: 800px) { .services { grid-template-columns: 1fr 1fr; } }

.service {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--line);
  background: rgba(17,17,22,0.78);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  overflow: hidden;
  transition: border-color 0.4s var(--ease), transform 0.5s var(--ease);
}
.service::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 50%),
    rgba(74, 222, 128, 0.08), transparent 40%);
  opacity: 0; transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.service:hover { border-color: rgba(74, 222, 128, 0.4); }
.service:hover::before { opacity: 1; }
.service__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
  letter-spacing: 0.18em;
}
.service__title {
  font-size: var(--fs-h3);
  font-weight: 300;
  letter-spacing: -0.015em;
  margin: 1rem 0;
}
.service__list { list-style: none; padding: 0; margin: 1.5rem 0 0; color: var(--fg-muted); }
.service__list li {
  padding: 0.6rem 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: flex; justify-content: space-between; gap: 1rem;
}
.service__list li::before { content: "—"; color: var(--fg-faint); }

/* ---------- Workflow timeline ---------- */
.workflow-grid {
  display: grid; gap: var(--gap-m);
  grid-template-columns: 1fr;
  counter-reset: step;
}
@media (min-width: 700px) { .workflow-grid { grid-template-columns: repeat(4, 1fr); } }

.step {
  padding: var(--gap-m) 0;
  border-top: 1px solid var(--line);
  position: relative;
  counter-increment: step;
}
.step::before {
  content: "0" counter(step);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--accent-2);
  display: block;
  margin-bottom: 1rem;
}
.step h3 {
  font-size: var(--fs-h3);
  font-weight: 200;
  letter-spacing: -0.015em;
  margin: 0 0 0.5rem;
}
.step p { color: var(--fg-muted); margin: 0; font-size: 0.95rem; }

/* ---------- Marquee ---------- */
.marquee {
  display: flex;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
  user-select: none;
}
.marquee__track {
  display: flex; flex-shrink: 0; gap: clamp(2rem, 6vw, 6rem);
  animation: marquee 40s linear infinite;
  padding-right: clamp(2rem, 6vw, 6rem);
}
.marquee__track span {
  font-size: clamp(2rem, 6vw, 5rem);
  font-weight: 200;
  letter-spacing: -0.02em;
  white-space: nowrap;
  color: var(--fg);
}
.marquee__track span em { font-style: italic; color: var(--accent-2); font-weight: 300; }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
}

/* ---------- Sustainability ---------- */
.sust {
  display: grid; gap: var(--gap-l);
  grid-template-columns: 1fr;
}
@media (min-width: 900px) { .sust { grid-template-columns: 1fr 1fr; } }
.stat {
  border-top: 1px solid var(--line);
  padding-top: var(--gap-m);
}
.stat__num {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 200;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--fg);
}
.stat__num em { font-style: normal; color: var(--accent-2); }
.stat__label { color: var(--fg-muted); margin: 0.5rem 0 0; max-width: 32ch; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid; gap: var(--gap-l);
  grid-template-columns: 1fr;
}
@media (min-width: 900px) { .contact-grid { grid-template-columns: 1fr 1fr; } }

.contact-card {
  border: 1px solid var(--line);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: rgba(17,17,22,0.80);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.contact-card h3 {
  font-size: var(--fs-h3);
  font-weight: 200;
  margin: 0 0 1rem;
}
.contact-card dl { margin: 0; display: grid; gap: 0.6rem; }
.contact-card dt { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg-muted); }
.contact-card dd { margin: 0 0 0.75rem; font-size: 1.05rem; }
.contact-card a:hover { color: var(--accent-2); }

.form { display: grid; gap: 1rem; }
.form label { display: grid; gap: 0.35rem; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-muted); }
.form input, .form textarea {
  background: transparent;
  border: 0; border-bottom: 1px solid var(--line);
  color: var(--fg);
  padding: 0.6rem 0;
  font: inherit;
  transition: border-color 0.3s var(--ease);
}
.form input:focus, .form textarea:focus {
  outline: none; border-bottom-color: var(--accent-2);
}
.form textarea { min-height: 120px; resize: vertical; }
.form__submit {
  justify-self: start;
  margin-top: 1rem;
  padding: 0.9rem 1.6rem;
  border: 1px solid var(--fg);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.form__submit:hover { background: var(--fg); color: var(--bg); }

/* honeypot */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--gap-l);
  display: grid; gap: var(--gap-m);
  grid-template-columns: 1fr;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
@media (min-width: 700px) { .site-footer { grid-template-columns: repeat(3, 1fr); } }
.site-footer strong { color: var(--fg); font-weight: 500; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .hero__title .word span { transform: none; }
  html { scroll-behavior: auto; }
}