/* ═══════════════════════════════════════════════════
   SinXl — Design Token System
   ───────────────────────────────────────────────────
   Ink:       #131519  — primary text, headings
   Slate:     #21252C  — dark surfaces
   Page:      #F7F6F3  — primary background
   Graphite:  #6C727A  — secondary text, borders
   Signal:    #2E5DA8  — accent, links, CTAs
   Frost:     #ECEBE6  — subtle alternate surface
   ═══════════════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Tokens as custom properties ───────────────────── */
:root {
  --ink: #131519;
  --slate: #21252C;
  --page: #F7F6F3;
  --graphite: #6C727A;
  --signal: #2E5DA8;
  --frost: #ECEBE6;

  --font-display: "DM Serif Display", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-card: 0 1px 3px rgba(19, 21, 25, 0.06), 0 1px 2px rgba(19, 21, 25, 0.04);
  --shadow-nav: 0 1px 0 rgba(19, 21, 25, 0.05);
  --shadow-modal: 0 4px 24px rgba(19, 21, 25, 0.14);

  --gap-xs: 0.375rem;
  --gap-sm: 0.75rem;
  --gap-md: 1.5rem;
  --gap-lg: 3rem;
  --gap-xl: 5rem;
  --gap-2xl: 8rem;

  --width-content: 880px;
  --width-narrow: 680px;
}

/* ── Base ───────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.625;
  color: var(--ink);
  background: var(--page);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  color: var(--ink);
}

h1 { font-size: 3rem; letter-spacing: -0.01em; }
h2 { font-size: 2.25rem; letter-spacing: -0.005em; }
h3 { font-size: 1.5rem; }

p {
  color: var(--ink);
  max-width: 64ch;
}

a {
  color: var(--signal);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--ink); }

/* ── Brand typography ───────────────────────────────── */
.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.brand-l {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 1.35rem;
  color: var(--graphite);
}

/* ── Top navigation ─────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(247, 246, 243, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-nav);
}

.nav-inner {
  max-width: var(--width-content);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand a {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--ink);
  transition: opacity 0.2s ease;
}
.nav-brand a:hover { opacity: 0.7; }
.nav-brand-l {
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--graphite);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--graphite);
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--ink); }

/* ── Waitlist button ────────────────────────────────── */
.btn-waitlist {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--ink);
  color: var(--page);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
  line-height: 1;
}
.btn-waitlist:hover {
  background: var(--slate);
  transform: translateY(-1px);
}

.btn-waitlist svg {
  width: 1rem;
  height: 1rem;
}

/* ── Sections ────────────────────────────────────────── */
.section {
  padding-top: var(--gap-2xl);
  padding-bottom: var(--gap-2xl);
}

.section-alt {
  background: var(--frost);
}

.section-inner {
  max-width: var(--width-content);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Hero ────────────────────────────────────────────── */
.hero {
  padding-top: calc(3.5rem + var(--gap-2xl));
  padding-bottom: var(--gap-2xl);
}

.hero-tag {
  font-family: var(--font-body);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: var(--gap-md);
}

.hero-title {
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: var(--gap-md);
  max-width: 14ch;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--graphite);
  max-width: 48ch;
  margin-bottom: var(--gap-lg);
}

.hero-trust {
  display: flex;
  align-items: flex-start;
  gap: var(--gap-sm);
  max-width: 48ch;
  padding: 1rem 1.25rem;
  background: var(--frost);
  border-radius: var(--radius-sm);
  border: 0.5px solid rgba(108, 114, 122, 0.12);
}

.hero-trust-icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.15rem;
  color: var(--signal);
}

.hero-trust p {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--graphite);
  max-width: none;
}

/* ── Promise / Benefits grid ────────────────────────── */
.section-eyebrow {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: var(--gap-sm);
}

.section-heading {
  font-family: var(--font-display);
  font-size: 2.25rem;
  color: var(--ink);
  margin-bottom: var(--gap-lg);
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
}

.benefit-card {
  background: var(--page);
  border: 0.5px solid rgba(108, 114, 122, 0.18);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.benefit-icon {
  width: 2rem;
  height: 2rem;
  margin-bottom: var(--gap-sm);
  color: var(--signal);
}

.benefit-heading {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: var(--gap-xs);
}

.benefit-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--graphite);
}

/* ── Products section ────────────────────────────────── */
.product-card {
  background: var(--page);
  border: 0.5px solid rgba(108, 114, 122, 0.18);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s ease;
}
.product-card:hover {
  box-shadow: 0 2px 8px rgba(19, 21, 25, 0.08);
}

.product-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem;
  background: var(--frost);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--graphite);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--gap-md);
}

.product-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

.product-name {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--ink);
  margin-bottom: var(--gap-xs);
}

.product-desc {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--graphite);
  max-width: 52ch;
  margin-bottom: var(--gap-md);
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--signal);
  transition: gap 0.2s ease;
}
.product-link:hover { gap: 0.75rem; }
.product-link svg { width: 1rem; height: 1rem; }

/* ── Future products ─────────────────────────────────── */
.future-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
  margin-top: var(--gap-lg);
}

.future-card {
  background: var(--frost);
  border: 0.5px solid rgba(108, 114, 122, 0.12);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  color: var(--graphite);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: none;
}

.future-card-icon {
  width: 2rem;
  height: 2rem;
  color: rgba(108, 114, 122, 0.35);
  margin: 0 auto var(--gap-sm);
}

/* ── EnXY Manager detail ─────────────────────────────── */
.section-security {
  background: var(--slate);
}

.section-security .section-eyebrow,
.section-security .section-heading,
.section-security .benefit-heading,
.section-security .benefit-text {
  color: var(--page);
}

.section-security .section-eyebrow { color: var(--graphite); }

.section-security .benefit-card {
  background: rgba(247, 246, 243, 0.05);
  border-color: rgba(108, 114, 122, 0.25);
}

/* Signature illustration */
.crypto-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gap-lg) 0;
}

.crypto-svg {
  width: 180px;
  height: 180px;
  opacity: 0.85;
}

.security-highlight {
  background: rgba(247, 246, 243, 0.06);
  border: 0.5px solid rgba(108, 114, 122, 0.2);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-top: var(--gap-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--gap-md);
}

.security-highlight-icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--page);
}

.security-highlight-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--page);
  margin-bottom: var(--gap-xs);
}

.security-highlight-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--graphite);
  max-width: 54ch;
}

/* ── Waitlist Modal ──────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(19, 21, 25, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  position: relative;
  background: var(--page);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: min(420px, calc(100vw - 2rem));
  padding: 2.5rem;
  transform: translateY(8px);
  transition: transform 0.25s ease;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--ink);
  margin-bottom: var(--gap-xs);
}

.modal-subtitle {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--graphite);
  margin-bottom: var(--gap-md);
}

.modal-google-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.75rem 1.25rem;
  background: var(--page);
  border: 1px solid rgba(108, 114, 122, 0.3);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.modal-google-btn:hover {
  background: var(--frost);
  border-color: rgba(108, 114, 122, 0.5);
}

.modal-google-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.modal-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: var(--gap-md) 0;
  color: var(--graphite);
  font-size: 0.8rem;
}

.modal-divider::before,
.modal-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(108, 114, 122, 0.2);
}

.modal-email {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.modal-email label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--graphite);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.modal-email-input {
  padding: 0.7rem 0.9rem;
  border: 1px solid rgba(108, 114, 122, 0.3);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s ease;
}

.modal-email-input:focus {
  border-color: var(--signal);
}

.modal-submit {
  width: 100%;
  padding: 0.75rem;
  background: var(--ink);
  color: var(--page);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

.modal-submit:hover {
  background: var(--slate);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  color: var(--graphite);
  transition: color 0.2s ease;
}

.modal-close:hover { color: var(--ink); }

.modal-note {
  margin-top: var(--gap-sm);
  font-size: 0.78rem;
  color: var(--graphite);
  text-align: center;
}

.modal-success {
  display: none;
  text-align: center;
  padding: var(--gap-lg) 0;
}

.modal-success.active {
  display: block;
}

.modal-success-icon {
  width: 3rem;
  height: 3rem;
  color: var(--signal);
  margin: 0 auto var(--gap-sm);
}

.modal-success-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: var(--gap-xs);
}

.modal-success-detail {
  font-size: 0.85rem;
  color: var(--graphite);
}

/* ── Footer ──────────────────────────────────────────── */
.site-footer {
  padding: var(--gap-lg) 0;
  border-top: 0.5px solid rgba(108, 114, 122, 0.15);
}

.footer-inner {
  max-width: var(--width-content);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--graphite);
}

.footer-brand-l {
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--graphite);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--graphite);
}

/* ── Utility ─────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  white-space: nowrap;
  clip: rect(0,0,0,0);
  clip-path: inset(50%);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}