:root {
  --ink: #132536;
  --ink-soft: #3d5368;
  --paper: #eef4f8;
  --paper-deep: #d7e4ef;
  --teal: #008f9a;
  --teal-deep: #00727a;
  --blue: #2f5f8a;
  --line: rgba(19, 37, 54, 0.12);
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Sora', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(80% 50% at 100% 0%, rgba(0, 143, 154, 0.08), transparent 55%),
    linear-gradient(180deg, var(--paper) 0%, #f7fafc 48%, var(--paper-deep) 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

a { color: inherit; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}

.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(238, 244, 248, 0.82);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(238, 244, 248, 0.94);
}

.site-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.brand-mark {
  width: auto;
  height: 28px;
  max-width: 170px;
  object-fit: contain;
  display: block;
  mix-blend-mode: multiply;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.site-nav a:hover { color: var(--ink); }

.btn-signin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff !important;
  font-weight: 600 !important;
}

.btn-signin:hover { background: #0b1a26; }

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #f7fbff;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 70% at 8% 12%, rgba(0, 186, 198, 0.42), transparent 52%),
    radial-gradient(80% 65% at 92% 8%, rgba(110, 168, 220, 0.5), transparent 48%),
    radial-gradient(90% 70% at 78% 88%, rgba(8, 36, 56, 0.7), transparent 55%),
    linear-gradient(155deg, #163852 0%, #1f4d6c 38%, #0c2436 100%);
  transform: scale(1.04);
  animation: heroDrift 18s ease-in-out infinite alternate;
}

.hero-atmosphere::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.05) 52%, transparent 64%);
  animation: heroSheen 14s ease-in-out infinite alternate;
  pointer-events: none;
}

.hero-atmosphere::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/img/logo.png?v=3');
  background-repeat: no-repeat;
  background-position: 94% 14%;
  background-size: min(40vw, 400px);
  opacity: 0.12;
  filter: brightness(0) invert(1);
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255, 255, 255, 0.015) 2px,
      rgba(255, 255, 255, 0.015) 3px
    );
  mix-blend-mode: overlay;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  width: 100%;
  margin: 0 auto;
  padding: 4.5rem 1.25rem 4rem;
  animation: heroRise 0.9s ease both;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5.6vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.02;
  margin-bottom: 1rem;
  text-shadow: 0 12px 48px rgba(8, 24, 38, 0.4);
}

.hero-inner h1 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.7vw, 1.95rem);
  font-weight: 600;
  max-width: 18ch;
  line-height: 1.22;
  margin-bottom: 0.9rem;
  color: rgba(247, 251, 255, 0.96);
}

.hero-lede {
  max-width: 34rem;
  font-size: 1.05rem;
  color: rgba(247, 251, 255, 0.84);
  margin-bottom: 1.7rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: #fff;
  color: var(--ink);
}

.btn-primary:hover { background: #e8f2f8; }

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }

.btn-dark {
  background: var(--ink);
  color: #fff;
}

.btn-dark:hover {
  background: #0b1a26;
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: rgba(19, 37, 54, 0.22);
}

.btn-outline:hover {
  background: rgba(19, 37, 54, 0.05);
}

.features,
.contact,
.flow,
.promise,
.audience,
.login-section {
  padding: 5.5rem 1.25rem;
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.promise {
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.promise-inner {
  max-width: 40rem;
}

.promise h2,
.audience h2 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw, 2.55rem);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin-bottom: 0.85rem;
  max-width: 16ch;
}

.features {
  position: relative;
  background:
    linear-gradient(180deg, rgba(247, 250, 252, 0.96) 0%, rgba(215, 228, 239, 0.58) 100%);
}

.section-intro {
  margin-bottom: 2.75rem;
}

.features h2,
.contact h2,
.flow h2,
.login-section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw, 2.55rem);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin-bottom: 0.85rem;
  max-width: 16ch;
}

.section-lede {
  color: var(--ink-soft);
  max-width: 38rem;
  margin-bottom: 0;
  font-size: 1.05rem;
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.feature-list li {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}

.feature-list li:hover {
  background: rgba(255, 255, 255, 0.45);
}

.feature-index {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--teal-deep);
  letter-spacing: 0.04em;
  padding-top: 0.2rem;
}

.feature-list h3 {
  font-family: var(--font-display);
  font-size: 1.28rem;
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}

.feature-list p {
  color: var(--ink-soft);
  font-size: 1rem;
  max-width: 44rem;
}

.audience {
  background:
    radial-gradient(70% 80% at 100% 0%, rgba(0, 143, 154, 0.07), transparent 55%),
    #fff;
  border-top: 1px solid var(--line);
}

.audience-list {
  list-style: none;
  display: grid;
  gap: 2rem 2.5rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 2.5rem;
}

.audience-list h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 0.45rem;
  letter-spacing: -0.02em;
}

.audience-list p {
  color: var(--ink-soft);
  font-size: 0.98rem;
  max-width: 28rem;
}

.flow {
  background:
    radial-gradient(70% 80% at 0% 50%, rgba(0, 143, 154, 0.08), transparent 55%),
    #fff;
  border-top: 1px solid var(--line);
}

.flow-inner {
  max-width: 40rem;
}

.flow-steps {
  display: grid;
  gap: 1rem;
  margin: 2rem 0 2.25rem;
  color: var(--ink-soft);
}

.flow-steps strong {
  color: var(--ink);
  font-weight: 600;
}

.flow-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact,
.contact-page {
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.contact-page {
  min-height: calc(100vh - 140px);
}

.contact-layout {
  display: grid;
  gap: 2.5rem;
  max-width: 36rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-field {
  display: grid;
  gap: 0.4rem;
}

.contact-field span {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.contact-field input,
.contact-field textarea {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 0.75rem 0.9rem;
  box-shadow: 0 0 0 1px var(--line);
  resize: vertical;
}

.contact-field input:focus,
.contact-field textarea:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--teal);
}

.contact-submit {
  justify-self: start;
  margin-top: 0.25rem;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  padding: 0.7rem 1.25rem;
  background: var(--teal-deep);
  color: #fff;
  font: inherit;
  font-weight: 600;
}

.contact-submit:hover {
  background: var(--teal);
}

.contact-submit:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.contact-form-status {
  font-size: 0.92rem;
  margin: 0;
}

.contact-form-status.ok { color: var(--teal-deep); }
.contact-form-status.err { color: #9b2c2c; }

.people-list {
  list-style: none;
  display: grid;
  gap: 1.75rem;
  max-width: 28rem;
  margin-bottom: 2.5rem;
  padding-top: 0;
  border-top: none;
}

.people-list h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
}

.people-list p,
.people-list a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
}

.people-list a:hover {
  color: var(--teal-deep);
  text-decoration: underline;
}

.contact-login-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1rem;
  color: var(--ink-soft);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(238, 244, 248, 0.9);
  padding: 1.5rem 1.25rem 2rem;
}

.site-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.site-footer a {
  text-decoration: none;
  font-weight: 600;
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: calc(var(--d, 0) * 90ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes heroRise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes heroDrift {
  from { transform: scale(1.02) translate3d(0, 0, 0); }
  to { transform: scale(1.06) translate3d(-1.5%, 1%, 0); }
}

@keyframes heroSheen {
  from { opacity: 0.35; transform: translateX(-4%); }
  to { opacity: 0.8; transform: translateX(4%); }
}

@media (max-width: 860px) {
  .feature-list li {
    grid-template-columns: 3rem minmax(0, 1fr);
    gap: 0.85rem;
  }

  .audience-list {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: calc(100vh - 64px);
    align-items: center;
  }

  .hero-atmosphere::after {
    background-position: 100% 8%;
    background-size: min(70vw, 280px);
    opacity: 0.1;
  }

  .site-nav a:not(.btn-signin) {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-inner,
  .hero-atmosphere,
  .hero-atmosphere::before,
  .reveal {
    animation: none;
    transition: none;
    opacity: 1;
    transform: none;
  }
}