:root {
  --color-bg: #D6FF3C;
  --color-bg-deep: #C8F52E;
  --color-ink: #0E0E0E;
  --color-ink-soft: #1a1a1a;
  --color-muted: #3a3a3a;
  --color-field: rgba(14, 14, 14, 0.08);
  --color-field-focus: rgba(14, 14, 14, 0.14);
  --radius-pill: 999px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 240ms;
  --dur-med: 500ms;
  --dur-slow: 900ms;
  --max-width: 1320px;
  --gutter: clamp(20px, 4vw, 56px);
}

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

html,
body {
  height: 100%;
}

body {
  font-family: 'Archivo', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* ── Background logo ──────────────────────────────────────── */
.bg-logo {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-logo-svg {
  width: min(115vh, 120vw);
  height: min(115vh, 120vw);
  color: var(--color-ink);
  opacity: 0.015;
  transform-origin: center;
  animation: bg-breathe 16s var(--ease-in-out) infinite;
  will-change: transform;
}

@keyframes bg-breathe {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.03); }
}

@media (max-width: 760px) {
  .bg-logo-svg { width: 160vw; height: 160vw; opacity: 0.015; }
}

/* ── Header ───────────────────────────────────────────────── */
.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(20px, 3vw, 36px) var(--gutter);
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-ink);
  opacity: 0;
  transform: translateY(-8px);
  animation: fade-down var(--dur-slow) var(--ease-out) 120ms forwards;
}

.logo-mark {
  width: 39px;
  height: auto;
  transition: transform var(--dur-med) var(--ease-out);
}

.logo:hover .logo-mark {
  transform: rotate(-18deg);
}

.logo-text {
  font-family: 'Syne', 'Archivo', system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: 0.02em;
  font-size: clamp(18px, 2.2vw, 22px);
}

.nav {
  opacity: 0;
  transform: translateY(-8px);
  animation: fade-down var(--dur-slow) var(--ease-out) 240ms forwards;
}

.nav-link {
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: clamp(15px, 1.4vw, 17px);
  padding: 8px 4px;
  position: relative;
  transition: opacity var(--dur-fast) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 4px;
  height: 2px;
  background: var(--color-ink);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur-med) var(--ease-out);
}

.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(20px, 5vw, 60px) var(--gutter) clamp(40px, 6vw, 80px);
  text-align: center;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

/* Headline */
.headline {
  font-weight: 900;
  font-size: clamp(2.6rem, 8.2vw, 7.5rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin-bottom: clamp(24px, 3.5vw, 38px);
  max-width: 14ch;
}

.line-break { display: block; height: 0; width: 100%; }

.word {
  display: inline-block;
  margin: 0 0.12em;
  white-space: nowrap;
}

.char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.4em);
  animation: char-in 900ms var(--ease-out) forwards;
  animation-delay: calc(120ms + var(--i) * 35ms);
  will-change: transform, opacity;
}

.char-dot {
  color: var(--color-ink);
}

@keyframes char-in {
  0%   { opacity: 0; transform: translateY(0.5em) scale(0.96); }
  60%  { opacity: 1; }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* Subtitle */
.subtitle {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  line-height: 1.55;
  color: var(--color-muted);
  max-width: 48ch;
  margin-bottom: clamp(28px, 4vw, 40px);
  opacity: 0;
  transform: translateY(14px);
  animation: fade-up var(--dur-slow) var(--ease-out) 1100ms forwards;
  font-weight: 500;
}

.br-mobile { display: none; }

/* Form */
.signup {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: center;
  width: min(620px, 100%);
  opacity: 0;
  transform: translateY(18px);
  animation: fade-up var(--dur-slow) var(--ease-out) 1300ms forwards;
}

.field {
  flex: 1 1 260px;
  position: relative;
}

.field input {
  width: 100%;
  height: 60px;
  padding: 0 26px;
  border: 2px solid transparent;
  border-radius: var(--radius-pill);
  background: var(--color-field);
  color: var(--color-ink);
  font-family: inherit;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  outline: none;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.field input::placeholder {
  color: rgba(14, 14, 14, 0.45);
  font-weight: 700;
  letter-spacing: 0.1em;
}

.field input:hover { background: var(--color-field-focus); }

.field input:focus {
  background: rgba(255, 255, 255, 0.4);
  border-color: var(--color-ink);
}

.field input:invalid:not(:placeholder-shown) {
  border-color: #c0392b;
}

.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 60px;
  padding: 0 34px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--color-ink);
  color: var(--color-bg);
  font-family: inherit;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-med) var(--ease-out);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%),
              rgba(214, 255, 60, 0.2), transparent 60%);
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-out);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -12px rgba(14, 14, 14, 0.45);
}

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

.btn-primary:active { transform: translateY(0); }

.btn-label { position: relative; z-index: 1; }

.btn-arrow {
  position: relative;
  z-index: 1;
  width: 18px;
  height: 18px;
  transition: transform var(--dur-med) var(--ease-out);
}

.btn-primary:hover .btn-arrow { transform: translateX(4px); }

.btn-primary[data-state="loading"] { pointer-events: none; opacity: 0.8; }
.btn-primary[data-state="loading"] .btn-arrow {
  animation: spin 900ms linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.form-message {
  flex-basis: 100%;
  min-height: 20px;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}

.form-message[data-visible="true"] { opacity: 1; transform: translateY(0); }
.form-message[data-kind="error"] { color: #8b1e1e; }
.form-message[data-kind="success"] { color: #0e0e0e; }

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 2;
  padding: 20px var(--gutter) clamp(20px, 3vw, 32px);
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--color-muted);
  opacity: 0;
  animation: fade-up var(--dur-slow) var(--ease-out) 1500ms forwards;
}

/* ── Shared keyframes ─────────────────────────────────────── */
@keyframes fade-down {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fade-up {
  to { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 760px) {
  .headline { font-size: clamp(2.1rem, 11vw, 4rem); }
  .br-mobile { display: inline; }
  .signup { flex-direction: column; }
  .field { flex-basis: auto; width: 100%; }
  .btn-primary { width: 100%; justify-content: center; }
  .nav-link { font-size: 15px; }
}

@media (max-width: 380px) {
  .logo-text { font-size: 16px; }
  .logo-mark { width: 28px; height: 28px; }
  .site-footer { font-size: 11px; }
}

@media (min-width: 1600px) {
  .headline { font-size: 8rem; }
}

/* ── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .char { opacity: 1; transform: none; }
  .logo, .nav, .subtitle, .signup, .site-footer { opacity: 1; transform: none; }
}