@import './tokens.css';

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 20px;
  color: var(--color-fg);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }

/* ============================================================
   Layout
   ============================================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}
@media (min-width: 768px)  { .container { padding: 0 var(--space-7); } }
@media (min-width: 1280px) { .container { padding: 0 var(--space-8); } }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-4);
  background: transparent;
  transition: padding 0.4s ease;
  pointer-events: none;
}
.site-header.is-scrolled { padding: 10px var(--space-4); }
.site-header.is-open { pointer-events: auto; }

.site-header__inner {
  width: 100%;
  max-width: 1200px;
  border: 1px solid transparent;
  border-radius: 0;
  pointer-events: auto;
  transition: max-width 0.4s ease, border-radius 0.4s ease,
              background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled .site-header__inner {
  max-width: 1000px;
  background: var(--ts-cream-a92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-color: var(--ts-bone);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  padding: 0 var(--space-5);
  gap: var(--space-5);
}
.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1;
  color: var(--ts-ink);
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__links {
  display: none;
  list-style: none;
  margin: 0; padding: 0;
  gap: var(--space-1);
}
@media (min-width: 768px) { .site-header__links { display: flex; } }
.site-header__links a {
  font-family: var(--font-label);
  font-size: 14px;
  font-weight: 500;
  color: var(--ts-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color 0.18s ease, background 0.18s ease;
}
.site-header__links a:hover { color: var(--ts-ink); background: var(--ts-green-100); }

/* Download button */
.site-header__download {
  display: none;
  align-items: center;
  height: 36px;
  padding: 0 var(--space-5);
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  background: var(--ts-ink);
  border: 1.5px solid var(--ts-ink);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.site-header__download:hover { background: var(--ts-ink-soft); border-color: var(--ts-ink-soft); }
@media (min-width: 768px) { .site-header__download { display: inline-flex; } }

/* Hamburger */
.site-header__burger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: 1.5px solid var(--ts-bone);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--ts-ink);
  transition: background 0.18s ease;
}
.site-header__burger:hover { background: var(--ts-green-100); }
@media (min-width: 768px) { .site-header__burger { display: none; } }

.burger-icon { display: flex; flex-direction: column; gap: var(--space-1); }
.burger-line {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}
.site-header.is-open .burger-line:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.site-header.is-open .burger-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.site-header.is-open .burger-line:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* Mobile menu */
.site-header__mobile-menu {
  display: none;
  position: fixed;
  top: 73px;
  left: 0; right: 0; bottom: 0;
  background: var(--ts-cream);
  z-index: 99;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-6) var(--space-4) var(--space-8);
  overflow-y: auto;
}
.site-header.is-open .site-header__mobile-menu { display: flex; }
.site-header__mobile-links {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.site-header__mobile-links a {
  display: block;
  font-family: var(--font-label);
  font-size: 18px;
  font-weight: 500;
  color: var(--ts-ink);
  text-decoration: none;
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-md);
  transition: background 0.18s ease;
}
.site-header__mobile-links a:hover { background: var(--ts-green-100); }
.site-header__mobile-cta { display: flex; justify-content: center; }

/* anchor offset for sticky header */
#how, #features, #faq { scroll-margin-top: 80px; }

/* ============================================================
   Scroll fade-in
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in.delay-1 { transition-delay: 0.1s; }
.fade-in.delay-2 { transition-delay: 0.2s; }
.fade-in.delay-3 { transition-delay: 0.3s; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: var(--space-3) var(--space-7);
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 24px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: box-shadow 0.2s ease, transform 0.12s ease, background-color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}
.btn:focus-visible {
  outline: 3px solid var(--ts-green);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--ts-green);
  color: var(--ts-ink);
  box-shadow: var(--shadow-button-green);
}
.btn-primary:hover { background: var(--ts-green-tint); box-shadow: var(--shadow-pill-glow); }
.btn-primary:active { transform: scale(0.97); }

@media (max-width: 767px) {
  .btn-full-mobile { width: 100%; }
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  background: var(--ts-ink);
  padding: var(--space-7) 0;
  text-align: center;
}
.footer__name {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 24px;
  color: var(--ts-cream);
  margin-bottom: var(--space-2);
}
.footer__copy {
  font-family: var(--font-body);
  font-size: 11px;
  line-height: 16px;
  color: var(--ts-cream-a28);
}