/* ─────────────────────────────────────────────────────────
   Sypera — sypera.io
   Dark, technical single-page site. No build step, no JS.
   ───────────────────────────────────────────────────────── */

:root {
  --bg:            #0a0c10;
  --bg-alt:        #0d1117;
  --surface:       #12171f;
  --surface-hover: #161d27;
  --border:        #1e2632;
  --border-strong: #2a3543;

  --text:          #e7ecf3;
  --text-dim:      #9aa7b8;
  --text-faint:    #7a8699;

  --accent:        #4fd1c5;
  --accent-dim:    #2f8f88;
  --accent-glow:   rgba(79, 209, 197, 0.14);

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;

  --wrap: 1120px;
  --pad: clamp(1.25rem, 5vw, 2.5rem);
  --radius: 12px;
  --section-pad: clamp(4rem, 9vw, 7rem);
  --header-h: 4.9rem;
}

/* ── Reset ─────────────────────────────────────────────── */

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

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; font-weight: 600; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
address { font-style: normal; }

::selection { background: var(--accent); color: #06231f; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: #06231f;
  padding: 0.6rem 1rem;
  font-weight: 600;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ── Layout ────────────────────────────────────────────── */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section {
  padding-block: var(--section-pad);
  /* Cancel the section's own top padding so an anchor click lands with the
     section label just under the sticky header, not 100px below it. */
  scroll-margin-top: calc(6.7rem - var(--section-pad));
}
.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

/* ── Header ────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 12, 16, 0.85);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
}
.brand-row { display: inline-flex; align-items: center; gap: 0.6rem; }
.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 0.34rem;
}
.brand-mark { width: 2.1rem; height: 2.1rem; color: var(--accent); }
.brand-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.17em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 3vw, 2.25rem);
  font-size: 1.02rem;
}
.site-nav a { color: var(--text); transition: color 0.18s ease; }
.site-nav a:hover { color: var(--accent); }

.nav-cta {
  color: var(--accent) !important;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.5rem 1.2rem;
  transition: border-color 0.18s ease, background 0.18s ease;
}
.nav-cta:hover { border-color: var(--accent-dim); background: var(--accent-glow); }

@media (max-width: 640px) {
  .site-nav a:not(.nav-cta) { display: none; }
}

/* ── Hero ──────────────────────────────────────────────── */

.hero {
  position: relative;
  padding-block: clamp(4.5rem, 13vw, 9rem) clamp(1.5rem, 4vw, 3rem);
  overflow: hidden;
}

/* Faint engineering grid + a single pool of accent light. */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 22% 0%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 22% 0%, #000 10%, transparent 72%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  top: -22rem;
  left: -12rem;
  width: 46rem;
  height: 46rem;
  background: radial-gradient(circle, var(--accent-glow), transparent 62%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  max-width: 22ch;
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-weight: 700;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.lede {
  margin-top: 1.5rem;
  max-width: 52ch;
  font-size: clamp(1.02rem, 1.6vw, 1.16rem);
  color: var(--text-dim);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.8rem 1.6rem;
  font-size: 0.97rem;
  font-weight: 600;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--accent); color: #06231f; }
.btn-primary:hover { background: #6fe0d5; }

.btn-ghost {
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent-dim); }

/* ── Section headings ──────────────────────────────────── */

.section-title {
  font-size: clamp(1.65rem, 3.4vw, 2.35rem);
  margin-bottom: 1.1rem;
}

.section-intro {
  max-width: 62ch;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

/* ── Grids ─────────────────────────────────────────────── */

.grid {
  display: grid;
  gap: 1.15rem;
  margin-top: 2.75rem;
}
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); }

/* ── Service cards ─────────────────────────────────────── */

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem 1.4rem;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.card::before {
  content: "";
  position: absolute;
  inset-inline: 1.5rem;
  top: -1px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.card:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.card:hover::before { opacity: 1; }

.card h3 { font-size: 1.09rem; margin-bottom: 0.7rem; }
.card p { color: var(--text-dim); font-size: 0.955rem; }

/* ── Engagement steps ──────────────────────────────────── */

.step { padding-top: 1.4rem; border-top: 2px solid var(--accent-dim); }
.step h3 { font-size: 1.09rem; margin-bottom: 0.6rem; }
.step p { color: var(--text-dim); font-size: 0.955rem; }

/* ── Company ───────────────────────────────────────────── */

.company-layout {
  display: grid;
  gap: clamp(2.25rem, 5vw, 4rem);
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  align-items: start;
}
@media (max-width: 800px) {
  .company-layout { grid-template-columns: 1fr; }
}

.founder {
  margin-top: clamp(2.5rem, 5vw, 3.75rem);
  padding: clamp(1.6rem, 3vw, 2.25rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent-dim);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.7fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
@media (max-width: 820px) {
  .founder { grid-template-columns: 1fr; }
}

.founder-role {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}
.founder-name { font-size: clamp(1.2rem, 2.2vw, 1.45rem); }

.founder-link {
  display: inline-block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease;
}
.founder-link:hover { border-bottom-color: var(--accent-dim); }

.founder-photo {
  display: block;
  width: min(200px, 60%);
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  margin-bottom: 1.25rem;
}

.founder-body p { color: var(--text-dim); font-size: 0.955rem; max-width: 66ch; }
.founder-body p + p { margin-top: 0.9rem; }

.facts {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 1.4rem;
}
.facts > div {
  padding-block: 1rem;
  border-bottom: 1px solid var(--border);
}
.facts > div:last-child { border-bottom: 0; }
.facts dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}
.facts dd { margin: 0; font-size: 0.95rem; }

/* ── Contact ───────────────────────────────────────────── */

.contact-grid {
  display: grid;
  gap: 1.15rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  margin-top: 2.75rem;
}
.contact-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.contact-block h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 0.9rem;
}
.contact-block address, .contact-block p { color: var(--text-dim); font-size: 0.955rem; }

.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  align-items: flex-start;
}
.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.985rem;
  color: var(--text-dim);
  transition: color 0.18s ease;
}
.social-links a:hover { color: var(--accent); }
.social-icon {
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
  flex-shrink: 0;
}

.map-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.18s ease;
}
.map-link:hover { color: var(--accent); }
.map-link .social-icon { width: 1.05rem; height: 1.05rem; }

.big-link {
  color: var(--accent);
  font-size: 1.05rem;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease;
  word-break: break-word;
}
.big-link:hover { border-bottom-color: var(--accent-dim); }

/* ── Footer ────────────────────────────────────────────── */

.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding-block: 1.75rem;
  font-size: 0.84rem;
  color: var(--text-faint);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 2rem;
  justify-content: space-between;
  align-items: baseline;
}