/* ---------------------------------------------------- */
/* Design Tokens                                        */
/* ---------------------------------------------------- */

:root {
  --bg: #08090c;
  --bg-elevated: #101218;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.18);

  --text: #f2f3f7;
  --text-muted: #9ba1b0;
  --text-subtle: #6b7280;

  --accent: #7c5cff;
  --accent-2: #22d3ee;

  --radius: 18px;
  --radius-sm: 10px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.75);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", sans-serif;
}

:root[data-theme="light"] {
  --bg: #f7f7f9;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-hover: #ffffff;
  --border: rgba(15, 18, 30, 0.09);
  --border-strong: rgba(15, 18, 30, 0.16);

  --text: #14161d;
  --text-muted: #5a6070;
  --text-subtle: #878d9c;

  --shadow: 0 18px 40px -22px rgba(20, 22, 35, 0.35);
}

/* ---------------------------------------------------- */
/* Reset & Base                                         */
/* ---------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

ul {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 650;
}

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 4px;
  border-radius: 6px;
}

/* Ambient background glow */
.glow {
  position: fixed;
  inset: -20% -10% auto -10%;
  height: 70vh;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(
      45% 55% at 22% 12%,
      hsl(255 90% 62% / 0.3),
      transparent 70%
    ),
    radial-gradient(40% 50% at 82% 4%, hsl(188 90% 55% / 0.22), transparent 70%);
  filter: blur(20px);
}

:root[data-theme="light"] .glow {
  opacity: 0.55;
}

/* ---------------------------------------------------- */
/* Layout                                               */
/* ---------------------------------------------------- */

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding-inline: 24px;
}

/* ---------------------------------------------------- */
/* Header                                               */
/* ---------------------------------------------------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  background-image: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 20px -8px hsl(255 90% 60% / 0.7);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background-color: var(--surface);
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s, background-color 0.25s,
    transform 0.25s var(--ease);
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.theme-icon--sun {
  display: none;
}

:root[data-theme="light"] .theme-icon--sun {
  display: block;
}

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

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

.hero {
  padding-block: clamp(56px, 10vw, 112px) clamp(56px, 8vw, 88px);
  max-width: 720px;
}

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  margin-bottom: 24px;
}

.gradient-text {
  background-image: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 48px;
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat dt {
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

.stat dd {
  margin-top: 4px;
  font-size: 1.08rem;
  font-weight: 600;
}

/* ---------------------------------------------------- */
/* Section head                                         */
/* ---------------------------------------------------- */

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 1.4rem;
}

.section-head p {
  font-size: 0.94rem;
  color: var(--text-subtle);
}

/* ---------------------------------------------------- */
/* Project grid                                         */
/* ---------------------------------------------------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
  padding-bottom: 96px;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.3s var(--ease),
    background-color 0.3s var(--ease), box-shadow 0.4s var(--ease);
}

.card:hover {
  transform: translateY(-5px);
  border-color: hsl(var(--hue) 70% 60% / 0.45);
  background-color: var(--surface-hover);
  box-shadow: var(--shadow);
}

.card-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Gradient placeholder thumbnail */
.thumb {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--border);
  background-image: linear-gradient(
    135deg,
    hsl(var(--hue) 72% 58%),
    hsl(calc(var(--hue) + 42) 68% 48%)
  );
  overflow: hidden;
}

.thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    75% 75% at 25% 15%,
    rgba(255, 255, 255, 0.3),
    transparent 60%
  );
}

.thumb span {
  position: relative;
  z-index: 1;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.22);
  transition: transform 0.5s var(--ease);
}

.card:hover .thumb span {
  transform: scale(1.12);
}

.card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 10px;
  padding: 22px 22px 20px;
}

.card-body h3 {
  font-size: 1.09rem;
}

.card-body > p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.info {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: auto;
  padding-top: 14px;
  font-size: 0.88rem;
  font-weight: 550;
  color: hsl(var(--hue) 75% 68%);
}

:root[data-theme="light"] .info {
  color: hsl(var(--hue) 65% 42%);
}


/* ---------------------------------------------------- */
/* Rechtstexte (Impressum, Datenschutz)                 */
/* ---------------------------------------------------- */

.legal {
  max-width: 800px;
  padding-block: clamp(40px, 7vw, 72px) clamp(64px, 9vw, 104px);
}

.legal-head {
  margin-bottom: clamp(32px, 5vw, 48px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background-color: var(--surface);
  font-size: 0.74rem;
  font-weight: 550;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-image: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.legal h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.1rem);
}

.legal-lead {
  margin-top: 18px;
  max-width: 62ch;
  font-size: 1.02rem;
  color: var(--text-muted);
}

/* Sprungmarken */
.legal-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.legal-toc a {
  padding: 6px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background-color: var(--surface);
  font-size: 0.83rem;
  color: var(--text-muted);
  transition: color 0.25s, border-color 0.25s, transform 0.25s var(--ease);
}

.legal-toc a:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* Abschnitte */
.legal-section {
  scroll-margin-top: 24px;
  padding-block: clamp(24px, 4vw, 32px);
  border-top: 1px solid var(--border);
}

.legal-section:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.legal-section h2 {
  position: relative;
  margin-bottom: 14px;
  padding-left: 16px;
  font-size: 1.16rem;
}

.legal-section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.16em;
  bottom: 0.16em;
  width: 3px;
  border-radius: 3px;
  background-image: linear-gradient(180deg, var(--accent), var(--accent-2));
}

.legal-section h3 {
  margin-top: 22px;
  margin-bottom: 8px;
  font-size: 0.98rem;
}

.legal-section p,
.legal-section li {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.legal-section > * + p,
.legal-section > * + ul {
  margin-top: 12px;
}

.legal-section ul {
  display: grid;
  gap: 8px;
  padding-left: 18px;
}

.legal-section li {
  list-style: disc;
}

.legal-section li::marker {
  color: var(--text-subtle);
}

.legal-section strong {
  font-weight: 600;
  color: var(--text);
}

.legal-section code {
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background-color: var(--surface);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    monospace;
  font-size: 0.86em;
  color: var(--text);
}

.legal-section a:not(.legal-toc a) {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  overflow-wrap: anywhere;
  transition: color 0.25s, text-decoration-color 0.25s;
}

.legal-section a:hover {
  color: var(--accent-2);
  text-decoration-color: currentColor;
}

/* Kontaktkarte */
.legal-card {
  margin-top: 16px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--surface);
  font-style: normal;
}

.legal-card dt {
  font-size: 0.73rem;
  font-weight: 550;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

.legal-card dd {
  margin-top: 3px;
  font-size: 0.95rem;
  color: var(--text);
}

.legal-card dd + dt {
  margin-top: 18px;
}

/* Hinweisbox */
.legal-note {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  background-color: var(--surface);
}

.legal-note p {
  font-size: 0.9rem;
}

/* Fußzeile des Rechtstexts */
.legal-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.legal-date {
  font-size: 0.84rem;
  color: var(--text-subtle);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background-color: var(--surface);
  font-size: 0.87rem;
  font-weight: 550;
  color: var(--text-muted);
  transition: color 0.25s, border-color 0.25s, transform 0.25s var(--ease);
}

.back-link:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.back-link span {
  transition: transform 0.3s var(--ease);
}

.back-link:hover span {
  transform: translateX(-4px);
}

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

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 24px;
  padding-block: 28px 40px;
  border-top: 1px solid var(--border);
  font-size: 0.87rem;
  color: var(--text-subtle);
}

.site-footer a {
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: color 0.25s, text-decoration-color 0.25s;
}

.site-footer a:hover {
  color: var(--text);
  text-decoration-color: currentColor;
}

.site-footer a[aria-current="page"] {
  color: var(--text);
}

/* ---------------------------------------------------- */
/* Reveal on scroll                                     */
/* ---------------------------------------------------- */

.reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity 0.6s var(--ease), translate 0.6s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  translate: none;
}

/* .card bringt eigene Hover-Transitions mit - hier zusammenfuehren, sonst
   ueberschreibt die Transition von .reveal sie komplett. */
.card.reveal {
  transition: opacity 0.6s var(--ease), translate 0.6s var(--ease),
    transform 0.4s var(--ease), border-color 0.3s var(--ease),
    background-color 0.3s var(--ease), box-shadow 0.4s var(--ease);
}

/* ---------------------------------------------------- */
/* Small screens                                        */
/* ---------------------------------------------------- */

@media (max-width: 560px) {
  .site-header,
  main,
  .site-footer {
    padding-inline: 18px;
  }

  .brand-text {
    display: none;
  }

  .stats {
    gap: 18px 32px;
  }

  .grid {
    grid-template-columns: 1fr;
    padding-bottom: 64px;
  }

  .legal-card {
    padding: 18px;
  }

  .legal-foot {
    flex-direction: column-reverse;
    align-items: flex-start;
  }
}