/* ============================================================
   Signentia landing — "ink on paper"
   Palette: warm paper, deep ink, Forte crimson accent
   Type: Fraunces (display) · Instrument Sans (body) · Spline Sans Mono (data)
   ============================================================ */

:root {
  --paper: #f6f3ec;
  --paper-deep: #efeadf;
  --ink: #1d1b18;
  --ink-soft: #4a4741;
  --ink-faint: #8a857c;
  --crimson: #c72036;
  --crimson-deep: #a3182b;
  --line: rgba(29, 27, 24, 0.14);
  --line-strong: rgba(29, 27, 24, 0.32);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Instrument Sans", "Helvetica Neue", sans-serif;
  --font-mono: "Spline Sans Mono", "Courier New", monospace;

  --container: 1160px;
  --radius: 6px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* paper grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

.mono { font-family: var(--font-mono); }

::selection { background: var(--crimson); color: var(--paper); }

h1, h2, h3 { font-weight: 560; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--crimson);
  color: #fff;
  box-shadow: 0 1px 0 rgba(29,27,24,0.2), 0 8px 24px -10px rgba(199, 32, 54, 0.55);
}
.btn-primary:hover {
  background: var(--crimson-deep);
  box-shadow: 0 1px 0 rgba(29,27,24,0.2), 0 10px 28px -8px rgba(199, 32, 54, 0.6);
  transform: translateY(-1px);
}

.btn-outline {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-outline:hover { border-color: var(--ink); background: rgba(29,27,24,0.04); }

.btn-ghost {
  padding: 9px 18px;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink); background: rgba(29,27,24,0.04); }

.btn-lg { padding: 16px 34px; font-size: 17px; }

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  width: 30px;
  height: 30px;
  align-self: center;
  color: var(--ink);
}
.brand-name {
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 640;
  letter-spacing: -0.01em;
}
.brand-by {
  font-size: 12.5px;
  color: var(--ink-faint);
  font-style: italic;
  font-family: var(--font-display);
  transform: translateY(-1px);
}

.site-nav { display: flex; gap: 30px; }
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--crimson);
  transition: right 0.22s ease;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: 16px; }

.lang-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  display: inline-flex;
  gap: 5px;
  padding: 6px 4px;
}
.lang-opt { transition: color 0.15s ease; }
.lang-opt.is-active { color: var(--crimson); font-weight: 500; }
.lang-toggle:hover .lang-opt:not(.is-active) { color: var(--ink); }
.lang-sep { color: var(--line-strong); }

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 96px 0 110px;
  overflow: hidden;
}

.hero-flourish {
  position: absolute;
  inset: auto 0 0 0;
  top: 0;
  width: 100%;
  height: 100%;
  color: var(--ink);
  opacity: 0.05;
  pointer-events: none;
}
.hero-flourish path {
  stroke-dasharray: 2400;
  stroke-dashoffset: 2400;
  animation: draw 3.2s cubic-bezier(0.4, 0, 0.2, 1) 0.4s forwards;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 64px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 26px;
}
.eyebrow-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--crimson);
  flex: none;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.4vw, 66px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 560;
  margin-bottom: 26px;
}
.hero-title-em {
  font-style: italic;
  font-weight: 560;
  color: var(--crimson);
}

.hero-lede {
  font-size: 19px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 54ch;
  margin-bottom: 36px;
}

.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-note {
  margin-top: 22px;
  font-size: 14px;
  color: var(--ink-faint);
}

/* --- hero visual --- */
.hero-visual {
  position: relative;
  min-height: 420px;
}

.sheet-card {
  position: relative;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow:
    0 1px 2px rgba(29,27,24,0.06),
    0 24px 48px -20px rgba(29,27,24,0.28);
  padding: 26px 26px 18px;
  transform: rotate(-1.6deg);
}

.sheet-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 6px;
}
.sheet-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 640;
  line-height: 1.3;
}
.sheet-sub { font-size: 12.5px; color: var(--ink-faint); margin-top: 3px; }
.sheet-stamp {
  flex: none;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--crimson);
  border: 1.5px solid var(--crimson);
  border-radius: 4px;
  padding: 4px 8px;
  transform: rotate(3deg);
  opacity: 0.85;
}

.sheet-row {
  display: grid;
  grid-template-columns: 1fr 120px 62px;
  gap: 14px;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line-strong);
}
.sheet-cell { display: flex; flex-direction: column; gap: 1px; }
.sheet-name { font-weight: 600; font-size: 14.5px; }
.sheet-meta { font-size: 11px; color: var(--ink-faint); }
.sheet-time { font-size: 11.5px; color: var(--ink-faint); text-align: right; }

.sheet-sig { width: 100%; height: 34px; }
.sheet-sig path {
  stroke: #24304d;
  stroke-width: 1.8;
}
.sig-draw path {
  stroke-dasharray: 260;
  stroke-dashoffset: 260;
  animation: draw 1.4s ease-out 0.9s forwards;
}
.sig-delay-1 path { animation-delay: 1.5s; }
.sig-delay-2 path { animation-delay: 2.1s; }

@keyframes draw { to { stroke-dashoffset: 0; } }

.sheet-foot {
  display: flex;
  justify-content: space-between;
  padding-top: 14px;
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
}
.sheet-hash { color: var(--crimson); }

.qr-chip {
  position: absolute;
  bottom: -28px;
  left: -18px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 10px;
  padding: 13px 18px 13px 13px;
  box-shadow: 0 18px 36px -14px rgba(29,27,24,0.5);
  transform: rotate(2deg);
  animation: float 5s ease-in-out infinite;
}
.qr-svg {
  width: 46px; height: 46px;
  background: var(--paper);
  color: var(--ink);
  border-radius: 6px;
  padding: 5px;
}
.qr-chip-text { display: flex; flex-direction: column; gap: 1px; }
.qr-chip-label { font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; opacity: 0.65; }
.qr-chip-name { font-family: var(--font-mono); font-size: 14px; }

.live-chip {
  position: absolute;
  top: -20px;
  right: -8px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 13px;
  box-shadow: 0 10px 24px -12px rgba(29,27,24,0.35);
  transform: rotate(1deg);
  animation: float 6s ease-in-out 0.8s infinite;
}
.live-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #2e9e5b;
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -7px; }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(46,158,91,0.5); }
  60% { box-shadow: 0 0 0 7px rgba(46,158,91,0); }
}

/* ============ Sections shared ============ */
.kicker {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 16px;
}
.kicker-crimson { color: var(--crimson); }
.kicker-paper { color: color-mix(in srgb, var(--paper) 70%, transparent); }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.015em;
}
.section-lede {
  margin-top: 18px;
  font-size: 18px;
  line-height: 1.65;
}

/* ============ Problem / solution ============ */
.problem {
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
  padding: 90px 0;
}
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--line);
  background: linear-gradient(to right, transparent 50%, #fffdf8 50%);
}
.problem-col { padding: 48px 44px; }
.solution-col { border-left: 1px solid var(--line); }

.problem-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 29px);
  line-height: 1.2;
  margin-bottom: 26px;
  letter-spacing: -0.01em;
}

.problem-list, .solution-list { list-style: none; display: grid; gap: 14px; }
.problem-list li, .solution-list li {
  position: relative;
  padding-left: 30px;
  font-size: 15.5px;
  color: var(--ink-soft);
  line-height: 1.5;
}
.problem-list li::before {
  content: "×";
  position: absolute;
  left: 0; top: -2px;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--ink-faint);
}
.solution-list li::before {
  content: "";
  position: absolute;
  left: 2px; top: 7px;
  width: 12px; height: 7px;
  border-left: 2px solid var(--crimson);
  border-bottom: 2px solid var(--crimson);
  transform: rotate(-45deg);
}

/* ============ Features ============ */
.features { padding: 110px 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 22px;
}
.feature-card {
  grid-column: span 2;
  position: relative;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 30px 28px 28px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  overflow: hidden;
}
.feature-wide { grid-column: span 3; padding-right: 90px; }

.feature-card::after {
  content: "";
  position: absolute;
  left: 28px; right: 28px;
  bottom: 0;
  height: 3px;
  background: var(--crimson);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 20px 40px -22px rgba(29,27,24,0.3);
}
.feature-card:hover::after { transform: scaleX(1); }

.feature-num {
  display: block;
  font-size: 13px;
  color: var(--crimson);
  letter-spacing: 0.1em;
  margin-bottom: 40px;
}
.feature-icon {
  position: absolute;
  top: 26px; right: 26px;
  width: 40px; height: 40px;
  color: var(--ink);
  opacity: 0.85;
}
.feature-card h3 {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 640;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ============ Compliance ============ */
.compliance {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding: 110px 0;
  overflow: hidden;
}
.compliance .section-title { color: var(--paper); }
.compliance .section-lede { color: color-mix(in srgb, var(--paper) 72%, transparent); }

.compliance-bg {
  position: absolute;
  inset: 0;
  font-size: 44px;
  line-height: 1.9;
  letter-spacing: 0.1em;
  color: rgba(246, 243, 236, 0.035);
  white-space: normal;
  word-break: break-all;
  padding: 20px;
  user-select: none;
  pointer-events: none;
}

.comp-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(246, 243, 236, 0.16);
  border: 1px solid rgba(246, 243, 236, 0.16);
}
.comp-item {
  background: var(--ink);
  padding: 38px 36px;
}
.comp-item h3 {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 640;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.comp-item h3::before {
  content: "§ ";
  color: var(--crimson);
  font-weight: 400;
}
.comp-item p {
  font-size: 15px;
  line-height: 1.65;
  color: color-mix(in srgb, var(--paper) 68%, transparent);
}

/* ============ How it works ============ */
.how {
  padding: 110px 0;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  counter-reset: step;
}
.step { position: relative; padding-top: 18px; }
.step-num {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 88px;
  line-height: 1;
  font-weight: 400;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--crimson);
  margin-bottom: 18px;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 640;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.step p { font-size: 15.5px; color: var(--ink-soft); }

/* connecting rule between steps */
.step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 62px;
  right: -38px;
  width: 28px;
  height: 1.5px;
  background: var(--line-strong);
}

/* ============ CTA band ============ */
.cta-band {
  background: var(--paper-deep);
  padding: 110px 0;
  text-align: center;
}
.cta-inner { max-width: 680px; }
.cta-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.2vw, 50px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 18px;
}
.cta-lede {
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 38px;
}
.cta-band .hero-ctas { justify-content: center; }

/* ============ Footer ============ */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 64px 0 36px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(246,243,236,0.14);
}
.brand-footer { color: var(--paper); }
.brand-footer .brand-mark { color: var(--paper); }
.footer-tag {
  margin-top: 14px;
  font-size: 14px;
  color: color-mix(in srgb, var(--paper) 60%, transparent);
  max-width: 42ch;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}
.footer-links a {
  color: color-mix(in srgb, var(--paper) 72%, transparent);
  text-decoration: none;
  font-size: 14.5px;
}
.footer-links a:hover { color: var(--paper); }

.footer-legal {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 28px;
  font-size: 13px;
  color: color-mix(in srgb, var(--paper) 50%, transparent);
}
.footer-domain { letter-spacing: 0.05em; }

/* ============ Legal page (privacy.html) ============ */
.legal-page { padding: 72px 0 100px; }
.legal-container { max-width: 780px; }

/* language blocks follow <html lang> set by the shared toggle */
html[lang="en"] [data-lang-block="tr"] { display: none; }
html[lang="tr"] [data-lang-block="en"] { display: none; }

.legal h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin-bottom: 14px;
}
.legal-updated {
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  margin-bottom: 34px;
}
.legal-intro {
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink-soft);
  padding: 22px 26px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-left: 3px solid var(--crimson);
  border-radius: var(--radius);
  margin-bottom: 44px;
}
.legal h2 {
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 640;
  letter-spacing: -0.01em;
  margin: 44px 0 14px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.legal p { margin-bottom: 14px; color: var(--ink-soft); font-size: 16px; line-height: 1.7; }
.legal p strong, .legal li strong { color: var(--ink); }
.legal ul {
  list-style: none;
  margin: 18px 0 22px;
  display: grid;
  gap: 12px;
}
.legal li {
  position: relative;
  padding-left: 26px;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.legal li::before {
  content: "§";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--crimson);
  font-family: var(--font-display);
}
.legal a { color: var(--crimson-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.legal a:hover { color: var(--crimson); }

.legal-back { margin-top: 56px; }
.legal-back a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15.5px;
  border-bottom: 2px solid var(--crimson);
  padding-bottom: 2px;
}
.legal-back a:hover { color: var(--crimson); }

/* ============ Reveal on scroll ============ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-flourish path, .sig-draw path { animation: none; stroke-dashoffset: 0; }
  .qr-chip, .live-chip, .live-dot { animation: none; }
}

/* ============ Responsive ============ */
@media (max-width: 1020px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card, .feature-wide { grid-column: span 1; padding-right: 28px; }
  .feature-wide { padding-right: 80px; }
  .steps { gap: 36px; }
  .step:not(:last-child)::after { display: none; }
}

@media (max-width: 880px) {
  .site-nav { display: none; }

  .hero { padding: 64px 0 90px; }
  .hero-grid { grid-template-columns: 1fr; gap: 72px; }
  .hero-visual { min-height: 0; margin: 0 12px; }

  .problem-grid { grid-template-columns: 1fr; background: none; }
  .solution-col { border-left: none; border-top: 1px solid var(--line); background: #fffdf8; }

  .comp-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .container { padding: 0 20px; }
  .brand-by { display: none; }
  .header-inner { gap: 12px; }
  .header-actions { gap: 10px; }
  .btn-ghost { padding: 8px 13px; font-size: 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .problem-col { padding: 36px 26px; }
  .comp-item { padding: 30px 24px; }
  .sheet-row { grid-template-columns: 1fr 90px; }
  .sheet-time { display: none; }
  .qr-chip { left: -6px; bottom: -24px; }
  .live-chip { right: 0; }
  .hero-ctas .btn { width: 100%; }
}

@media (max-width: 360px) {
  .header-inner .container, .site-header .container { padding: 0 14px; }
  .brand-name { font-size: 20px; }
  .brand-mark { width: 26px; height: 26px; }
  .btn-ghost { padding: 7px 11px; }
  .lang-toggle { padding: 6px 0; }
}