/* Code is English; content is German. */

/* ---------- Reset / Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #07070a;
  --bg-elev: rgba(255, 255, 255, 0.04);
  --card: rgba(255, 255, 255, 0.06);
  --card-strong: rgba(255, 255, 255, 0.09);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --faint: rgba(255, 255, 255, 0.48);
  --stroke: rgba(255, 255, 255, 0.10);
  --stroke-strong: rgba(255, 255, 255, 0.16);

  --primary: #7c5cff; /* elegant purple */
  --primary-2: #24d3ee; /* cyan accent */
  --good: #42ffb0;

  --shadow: 0 22px 60px rgba(0, 0, 0, 0.55);
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.35);

  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;

  --container: 1120px;

  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  --ease: cubic-bezier(0.2, 0.9, 0.2, 1);
  --ease-soft: cubic-bezier(0.2, 0.8, 0.2, 1);

  --header-h: 74px;
}

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(1200px 900px at 10% -10%, rgba(124, 92, 255, 0.25), transparent 60%),
    radial-gradient(1000px 800px at 90% 0%, rgba(36, 211, 238, 0.18), transparent 55%),
    radial-gradient(900px 700px at 70% 120%, rgba(66, 255, 176, 0.10), transparent 45%),
    var(--bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

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

button,
input,
textarea {
  font: inherit;
}

::selection {
  background: rgba(124, 92, 255, 0.35);
}

/* ---------- Utilities ---------- */
.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 14px;
  transform: translateY(-140%);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid var(--stroke);
  padding: 10px 14px;
  border-radius: 12px;
  backdrop-filter: blur(12px);
  z-index: 9999;
  transition: transform 250ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.muted {
  color: var(--muted);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  display: grid;
  align-items: center;
  background: rgba(7, 7, 10, 0.62);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.header-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(520px 140px at 50% 0%, rgba(124, 92, 255, 0.22), transparent 70%);
  opacity: 0.9;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
}

.brand:hover {
  background: rgba(255, 255, 255, 0.05);
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 0 0 6px rgba(124, 92, 255, 0.16);
}

.brand-name {
  letter-spacing: -0.02em;
  font-weight: 600;
}

.nav {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-menu a {
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
  transition: background 200ms var(--ease), color 200ms var(--ease), transform 200ms var(--ease);
}

.nav-menu a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  transform: translateY(-1px);
}

.nav-cta {
  color: var(--text) !important;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--stroke);
}

.nav-cta:hover {
  background: rgba(255, 255, 255, 0.09) !important;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 12px;
  cursor: pointer;
}

.nav-toggle-lines {
  width: 18px;
  height: 12px;
  display: inline-block;
  position: relative;
}

.nav-toggle-lines::before,
.nav-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  transition: transform 250ms var(--ease);
}

.nav-toggle-lines::before {
  top: 0;
}

.nav-toggle-lines::after {
  bottom: 0;
}

/* ---------- Sections ---------- */
.section {
  padding: 90px 0;
}

.section.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 55%);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 36px);
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
  line-height: 1.6;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 92px 0 70px;
  overflow: clip;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin: 0 0 14px;
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
}

.hero-title {
  margin: 0 0 14px;
  font-size: clamp(36px, 5vw, 64px);
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.hero-subtitle {
  margin: 0 0 26px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 68ch;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  transition: transform 200ms var(--ease), background 200ms var(--ease), border-color 200ms var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  border: 0;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.95), rgba(36, 211, 238, 0.85));
  box-shadow: 0 18px 45px rgba(124, 92, 255, 0.20);
}

.btn-primary:hover {
  background: linear-gradient(135deg, rgba(124, 92, 255, 1), rgba(36, 211, 238, 0.95));
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.035);
  border-radius: 18px;
  padding: 14px 14px 12px;
  backdrop-filter: blur(12px);
}

.stat-value {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 18px;
}

.stat-label {
  color: var(--muted);
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.35;
}

/* ---------- Hero Visual ---------- */
.hero-visual {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
}

.avatar-card {
  width: min(420px, 92%);
  border-radius: 32px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  transform: translateZ(0);
}

.avatar {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.03);
}

.avatar-ring {
  position: absolute;
  inset: -2px;
  border-radius: 34px;
  pointer-events: none;
  background:
    radial-gradient(600px 380px at 20% 10%, rgba(124, 92, 255, 0.30), transparent 55%),
    radial-gradient(560px 360px at 90% 40%, rgba(36, 211, 238, 0.22), transparent 55%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), transparent 25%);
  mix-blend-mode: screen;
  opacity: 0.85;
}

.avatar-caption {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  padding: 12px 14px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(10, 10, 14, 0.55);
  backdrop-filter: blur(14px);
}

.caption-title {
  font-weight: 650;
  letter-spacing: -0.02em;
}

.caption-sub {
  margin-top: 2px;
  color: var(--muted);
  font-size: 13px;
}

.floating-cards {
  position: absolute;
  inset: auto;
  width: min(520px, 100%);
  height: 420px;
  pointer-events: none;
}

.float-card {
  position: absolute;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(14px);
  padding: 12px 14px;
  box-shadow: var(--shadow-soft);
  animation: float 8s var(--ease-soft) infinite;
  transform: translateZ(0);
}

.float-card:nth-child(1) {
  left: -10px;
  top: 40px;
  animation-delay: 0s;
}

.float-card:nth-child(2) {
  right: -14px;
  top: 120px;
  animation-delay: 1.2s;
}

.float-card:nth-child(3) {
  left: 40px;
  bottom: 24px;
  animation-delay: 2.2s;
}

.float-title {
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 13px;
}

.float-sub {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) translateX(0);
  }
  50% {
    transform: translateY(-10px) translateX(6px);
  }
}

/* Hero backdrop mesh / grain */
.hero-backdrop {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(900px 700px at 20% 30%, rgba(124, 92, 255, 0.18), transparent 55%),
    radial-gradient(900px 700px at 80% 25%, rgba(36, 211, 238, 0.13), transparent 55%),
    radial-gradient(900px 700px at 60% 85%, rgba(66, 255, 176, 0.09), transparent 60%);
  filter: blur(18px);
  opacity: 0.9;
}

.grain {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='280' height='280'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='280' height='280' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  opacity: 0.22;
  mix-blend-mode: overlay;
}

/* ---------- Cards / Layout ---------- */
.card {
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.035);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.30);
  padding: 22px;
}

.card h3 {
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checklist {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  color: var(--muted);
}

.checklist li {
  position: relative;
  padding-left: 26px;
  line-height: 1.6;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: rgba(66, 255, 176, 0.9);
  font-weight: 700;
}

.pill-row {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.skill .meter {
  margin-top: 14px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.07);
  overflow: hidden;
}

.skill .meter span {
  display: block;
  height: 100%;
  width: var(--w);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(124, 92, 255, 0.9), rgba(36, 211, 238, 0.85));
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.25);
}

.meter-labels {
  margin-top: 10px;
  display: flex;
  justify-content: space-between;
  color: var(--faint);
  font-size: 12px;
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.project-top {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.badge {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.78);
}

.badge.subtle {
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.68);
}

.project-meta {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--faint);
  font-size: 12px;
}

.projects-footer {
  margin-top: 14px;
}

.callout {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 14px;
  align-items: start;
}

.form label {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.form label span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

input,
textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
  outline: none;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

input:focus,
textarea:focus {
  border-color: rgba(124, 92, 255, 0.55);
  background: rgba(0, 0, 0, 0.28);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.form-hint {
  margin: 0;
  color: var(--faint);
  font-size: 12px;
}

.toast {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.85);
  display: none;
}

.toast.show {
  display: block;
}

.contact-aside .contact-links {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.link-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.link-row:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.14);
}

.link-row-right {
  color: var(--faint);
  font-size: 12px;
}

.mini-note {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.mini-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(66, 255, 176, 0.95), rgba(36, 211, 238, 0.85));
  margin-top: 4px;
  box-shadow: 0 0 0 6px rgba(66, 255, 176, 0.10);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.92em;
  color: rgba(255, 255, 255, 0.86);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 28px 0 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 18px;
}

.to-top {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.04);
  transition: transform 200ms var(--ease), background 200ms var(--ease);
}

.to-top:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.07);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .floating-cards {
    display: none;
  }

  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .callout {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 66px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
  }

  .nav-menu {
    position: absolute;
    right: 20px;
    top: calc(var(--header-h) - 6px);
    width: min(320px, calc(100vw - 40px));
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.10);
    background: rgba(10, 10, 14, 0.82);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-soft);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    width: 100%;
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .float-card {
    animation: none;
  }
  .btn,
  .nav-menu a,
  .to-top,
  .link-row {
    transition: none;
  }
}