:root {
  --bg: #0a0a0f;
  --border: #1e1e2e;
  --accent: #5b8cff;
  --accent2: #00b5a8;
  --text: #e8e8f0;
  --muted: #6a6a80;
  --card-bg: #13131c;
  --input-bg: #0e0e18;
  --accent-dim: rgba(0, 229, 195, 0.08);
  --accent-glow: rgba(0, 229, 195, 0.15);
  --text-muted: #7a8ba0;
  --text-faint: #3e4f61;
  --sans: 'Sora', system-ui, sans-serif;
}

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

body {
  font-family: 'DM Mono', monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 60px 24px 100px;
}

body::after {
  content: '';
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(200, 240, 96, 0.06), transparent 70%);
  pointer-events: none;
}

.wrapper {
  width: 100%;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}


header {
  animation: fadeUp 0.6s ease both;
}

.eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.eyebrow::after {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 12px;
}

h1 em {
  font-style: italic;
  color: var(--accent);
}

.subtitle {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.7;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeUp 0.6s 0.1s ease both;
}

input[type="date"] {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 14px 16px;
  font-family: 'DM Mono', monospace;
  font-size: 0.9rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
  color-scheme: dark;
}

input:focus {
  border-color: var(--accent);
}

input.error {
  border-color: rgba(240, 96, 96, 0.6);
}

#startBtn {
  background: var(--accent);
  color: #0a0a0f;
  border: none;
  border-radius: 2px;
  padding: 14px;
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
}

#startBtn:hover {
  background: var(--accent2);
  box-shadow: 0 0 20px rgba(96, 200, 240, 0.2);
}

#startBtn:active {
  transform: scale(0.97);
}


.result {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 40px 28px;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  animation: fadeUp 0.5s ease both;
}

.result.show {
  display: flex;
}


.units {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.num {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.8rem, 9vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.03em;
  min-width: 2ch;
  text-align: center;
}

.num.tick {
  animation: tick 0.2s ease;
}

.lbl {
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.dot {
  font-family: 'DM Serif Display', serif;
  font-size: 3rem;
  color: var(--border);
  padding-bottom: 22px;
  align-self: flex-start;
  margin-top: 4px;
}


.expired {
  display: none;
  font-family: 'DM Serif Display', serif;
  font-size: 1.8rem;
  font-style: italic;
  color: var(--accent);
  text-align: center;
  animation: popIn 0.4s ease both;
}

.expired.show {
  display: block;
}


.reset-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px 24px;
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.reset-btn:hover {
  color: var(--text);
  border-color: var(--muted);
}

/* Footer */
footer {
  width: 100%;
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid var(--border);

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-name {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text);
}

.footer-social {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: transparent;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s, background 0.25s;
  position: relative;
  overflow: hidden;
}

.footer-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.footer-btn--github {
  color: var(--accent);
}

.footer-btn--github::before {
  background: rgba(91, 140, 255, 0.06);
}

.footer-btn--github:hover {
  border-color: rgba(91, 140, 255, 0.4);
  box-shadow: 0 0 16px rgba(91, 140, 255, 0.12);
  transform: translateY(-2px);
}

.footer-btn--github:hover::before {
  opacity: 1;
}

.footer-btn--linkedin {
  color: var(--accent2);
}

.footer-btn--linkedin::before {
  background: rgba(61, 255, 208, 0.06);
}

.footer-btn--linkedin:hover {
  border-color: rgba(61, 255, 208, 0.4);
  box-shadow: 0 0 16px rgba(61, 255, 208, 0.12);
  transform: translateY(-2px);
}

.footer-btn--linkedin:hover::before {
  opacity: 1;
}

.project-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid #1e1e2e;
  font-family: 'DM Mono', monospace;
}

.project-nav::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 28px;
  width: 60px;
  height: 1px;
  background: var(--accent);
}

.nav-home {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #e8e8f0;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-home svg {
  color: var(--accent);
  transition: transform 0.2s;
}

.nav-home:hover {
  color: var(--accent);
}

.nav-home:hover svg {
  transform: translateX(-3px);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
  margin: 0 auto;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}


/* ── LANGUAGE TOGGLE ── */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
}

.lang-btn {
  padding: 0.22rem 0.52rem;
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: 5px;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-faint);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  line-height: 1;
}

.lang-btn:hover {
  color: var(--accent);
  border-color: rgba(0, 229, 195, 0.3);
}

.lang-btn.active {
  background: rgba(0, 229, 195, 0.12);
  border-color: rgba(0, 229, 195, 0.35);
  color: var(--accent);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tick {
  from {
    opacity: 0.3;
    transform: translateY(-5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes popIn {
  0% {
    transform: scale(0.8);
    opacity: 0;
  }

  70% {
    transform: scale(1.05);
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ── Mobile Back Button ── */
.back-btn {
  display: none;
  /* Desktop: versteckt */
}

/* ─── Mobile Nav: bis 600px ──────────────────────── */
@media (max-width: 600px) {

  .project-nav {
    padding: 0 16px;
  }

  .nav-links {
    display: none;
  }
  
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    align-self: flex-start;
    padding: 8px 16px;
    font-family: 'DM Mono', monospace;
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--accent);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 2px;
    margin-bottom: 3vh;
    position: relative;
    overflow: hidden;
    transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s, background 0.25s;
    animation: fadeUp 0.5s ease both;
  }

  .back-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(91, 140, 255, 0.06);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
  }

  .back-btn:hover {
    border-color: rgba(91, 140, 255, 0.4);
    box-shadow: 0 0 16px rgba(91, 140, 255, 0.12);
    transform: translateY(-2px);
  }

  .back-btn:hover::before {
    opacity: 1;
  }

  .back-btn:active {
    transform: scale(0.97);
  }

}