/* ============================================================
   Percisor — Minimal Monochrome Design System
   Sharp edges, no color, pure structure
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Default Dark Mode */
  --c-black: #000000;
  --c-bg: #050505;
  --c-surface: #0a0a0a;
  --c-border: #1a1a1a;
  --c-border-h: #333333;
  --c-text: #e0e0e0;
  --c-text-dim: #777777;
  --c-white: #ffffff;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: .25s ease;
  --max-w: 1080px;
  --section-py: 120px;
}

/* Light Mode Overrides */
body.light-mode {
  --c-bg: #ffffff;
  --c-surface: #f9f9f9;
  --c-border: #e5e5e5;
  --c-border-h: #cccccc;
  --c-text: #333333;
  --c-text-dim: #666666;
  --c-white: #000000;
  /* Inverted for headings */
  --c-black: #ffffff;
  /* Inverted for primary buttons */
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--c-text);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--c-white);
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Typography --- */
h1,
h2,
h3 {
  line-height: 1.15;
  font-weight: 700;
  color: var(--c-white);
}

h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  letter-spacing: -.04em;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  letter-spacing: -.03em;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -.01em;
}

.accent-text {
  color: var(--c-white);
}

/* --- Language Toggle --- */
[data-lang-content="en"] {
  display: none;
}

[data-lang-content="de"] {
  display: contents;
}

body.lang-en [data-lang-content="en"] {
  display: contents;
}

body.lang-en [data-lang-content="de"] {
  display: none;
}

.lang-block[data-lang-content="en"] {
  display: none;
}

.lang-block[data-lang-content="de"] {
  display: block;
}

body.lang-en .lang-block[data-lang-content="en"] {
  display: block;
}

body.lang-en .lang-block[data-lang-content="de"] {
  display: none;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(5, 5, 5, 0.85);
  /* Dark Mode Default (Top) */
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--transition), border-color var(--transition);
}

.nav.scrolled {
  background: rgba(5, 5, 5, 0.95);
  /* Dark Mode Scrolled */
}

body.light-mode .nav {
  background: rgba(255, 255, 255, 0.85);
  /* Light Mode Top */
}

body.light-mode .nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  /* Light Mode Scrolled */
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--c-white);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo .logo-mark {
  width: 24px;
  height: 24px;
  display: block;
  /* Removed border and text styles as it is now an SVG image */
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: .8rem;
  font-weight: 500;
  color: var(--c-text-dim);
  text-transform: uppercase;
  letter-spacing: .06em;
  transition: color var(--transition);
}

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

.lang-toggle {
  display: flex;
  border: 1px solid var(--c-border);
  overflow: hidden;
  font-size: .75rem;
}

.lang-toggle button {
  background: transparent;
  border: none;
  color: var(--c-text-dim);
  padding: 5px 10px;
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
  letter-spacing: .04em;
  transition: all var(--transition);
}

.lang-toggle button.active {
  background: var(--c-white);
  color: var(--c-black);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-text-dim);
  padding: 5px 10px;
  cursor: pointer;
  font-family: var(--font);
  font-size: .75rem;
  /* Matches lang toggle */
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 27px;
  /* Matches lang toggle height approx */
  width: 32px;
}

.theme-toggle:hover {
  color: var(--c-white);
  border-color: var(--c-white);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-text);
  font-size: 1rem;
  cursor: pointer;
  padding: 6px 10px;
  font-family: var(--font);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 56px;
  border-bottom: 1px solid var(--c-border);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 79px, var(--c-border) 79px, var(--c-border) 80px),
    repeating-linear-gradient(90deg, transparent, transparent 79px, var(--c-border) 79px, var(--c-border) 80px);
  opacity: .3;
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 720px;
  padding: 80px 24px 100px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--c-text-dim);
  border: 1px solid var(--c-border);
  padding: 6px 14px;
  margin-bottom: 32px;
}

.hero h1 {
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--c-text-dim);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.8;
  text-align: center;
}

.hero-content {
  text-align: center;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  font-family: var(--font);
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--c-white);
  color: var(--c-black);
  border-color: var(--c-white);
}

.btn-primary:hover {
  background: transparent;
  color: var(--c-white);
}

.btn-secondary {
  background: transparent;
  border-color: var(--c-border-h);
  color: var(--c-text);
}

.btn-secondary:hover {
  border-color: var(--c-white);
  color: var(--c-white);
}

/* --- Sections --- */
.section {
  padding: var(--section-py) 0;
  position: relative;
  border-bottom: 1px solid var(--c-border);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.section-header .overline {
  display: inline-block;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--c-text-dim);
  margin-bottom: 16px;
}

.section-header p {
  color: var(--c-text-dim);
  margin-top: 14px;
  font-size: .95rem;
}

/* --- Problem-Solution --- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--c-border);
}

.problem-card,
.solution-card {
  background: var(--c-bg);
  padding: 40px 36px;
  transition: background var(--transition);
}

.problem-card:hover,
.solution-card:hover {
  background: var(--c-surface);
}

.card-label {
  font-size: .65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--c-text-dim);
  margin-bottom: 16px;
  display: block;
}

.problem-card .card-label {
  color: #666;
}

.solution-card .card-label {
  color: #999;
}

.problem-card h3,
.solution-card h3 {
  margin-bottom: 12px;
}

.problem-card p,
.solution-card p {
  color: var(--c-text-dim);
  font-size: .9rem;
  line-height: 1.7;
}

/* --- Features --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-border);
}

.feature-card {
  background: var(--c-bg);
  padding: 36px 32px;
  transition: background var(--transition);
}

.feature-card:hover {
  background: var(--c-surface);
}

.feature-num {
  font-size: .7rem;
  font-weight: 700;
  color: var(--c-text-dim);
  letter-spacing: .06em;
  margin-bottom: 20px;
  display: block;
}

.feature-card h3 {
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--c-text-dim);
  font-size: .88rem;
  line-height: 1.7;
}

/* --- How It Works --- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-border);
}

.step {
  background: var(--c-bg);
  padding: 48px 36px;
  text-align: left;
}

.step-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--c-border-h);
  line-height: 1;
  margin-bottom: 24px;
  letter-spacing: -.04em;
}

.step h3 {
  margin-bottom: 10px;
}

.step p {
  color: var(--c-text-dim);
  font-size: .88rem;
  line-height: 1.7;
}

/* --- Trust --- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--c-border);
  margin-bottom: 48px;
}

.trust-item {
  background: var(--c-bg);
  text-align: center;
  padding: 36px 16px;
}

.trust-item .value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--c-white);
  margin-bottom: 6px;
  letter-spacing: -.02em;
}

.trust-item .label {
  font-size: .75rem;
  color: var(--c-text-dim);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.trust-badges {
  display: flex;
  justify-content: center;
  gap: 1px;
  background: var(--c-border);
  max-width: 720px;
  margin: 0 auto;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: var(--c-bg);
  font-size: .8rem;
  color: var(--c-text-dim);
  flex: 1;
  justify-content: center;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: 120px 0;
  border-bottom: 1px solid var(--c-border);
}

.cta-section h2 {
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--c-text-dim);
  margin-bottom: 40px;
  font-size: .95rem;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}

.cta-form {
  display: flex;
  gap: 0;
  justify-content: center;
  max-width: 480px;
  margin: 0 auto;
}

.cta-form input {
  flex: 1;
  min-width: 200px;
  padding: 14px 18px;
  background: transparent;
  border: 1px solid var(--c-border-h);
  border-right: none;
  color: var(--c-text);
  font-family: var(--font);
  font-size: .85rem;
  outline: none;
  transition: border-color var(--transition);
}

.cta-form input:focus {
  border-color: var(--c-white);
}

.cta-form input::placeholder {
  color: var(--c-text-dim);
}

.cta-form .btn {
  border-left: none;
}

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

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: .75rem;
  color: var(--c-text-dim);
  letter-spacing: .02em;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: .75rem;
  color: var(--c-text-dim);
  letter-spacing: .02em;
}

.footer-links a:hover {
  color: var(--c-white);
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  :root {
    --section-py: 80px;
  }

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

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

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

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

@media (max-width: 640px) {
  :root {
    --section-py: 60px;
  }

  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(5, 5, 5, .97);
    backdrop-filter: blur(16px);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--c-border);
  }

  .mobile-toggle {
    display: block;
  }

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

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

  .trust-badges {
    flex-direction: column;
  }

  .hero-content {
    padding: 48px 16px 64px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-form {
    flex-direction: column;
  }

  .cta-form input {
    border-right: 1px solid var(--c-border-h);
    border-bottom: none;
  }

  .cta-form .btn {
    border-left: 1px solid var(--c-white);
  }
}