/*
  Shift Assistant — official product site
  Local fonts only; no CDN / analytics / ads.
*/

:root {
  --ink: #0f2430;
  --ink-soft: #3d5563;
  --mist: #eef5f7;
  --paper: #f7fbfc;
  --line: #c9d9df;
  --brand: #0b5f6e;
  --brand-deep: #073f4a;
  --accent: #2a9d8f;
  --accent-soft: #d7f0ec;
  --warn-soft: #fff4e5;
  --max: 68rem;
  --nav-h: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background-color: var(--paper);
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", "Noto Sans TC",
    sans-serif;
  line-height: 1.65;
  font-size: 1.05rem;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--brand-deep);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: rgba(247, 251, 252, 0.9);
  border-bottom: 1px solid rgba(201, 217, 223, 0.7);
}

.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  min-height: var(--nav-h);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-mark {
  display: inline-flex;
  flex-direction: column;
  gap: 0.1rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark strong {
  font-family: Georgia, "Source Han Serif TC", "Noto Serif TC", "Songti TC",
    serif;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  color: var(--brand-deep);
}

.brand-mark span {
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 0.5rem;
  padding: 0.45rem 0.7rem;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  align-items: center;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--brand-deep);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - var(--nav-h));
  display: grid;
  align-items: end;
  background:
    radial-gradient(ellipse 80% 60% at 85% 15%, rgba(42, 157, 143, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 10% 80%, rgba(11, 95, 110, 0.18), transparent 50%),
    linear-gradient(160deg, #e7f3f5 0%, #f7fbfc 45%, #eef6f8 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 63, 74, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 63, 74, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 85%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
  padding: 4.5rem 1.25rem 3.5rem;
}

.hero-brand {
  font-family: Georgia, "Source Han Serif TC", "Noto Serif TC", "Songti TC",
    serif;
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--brand-deep);
  margin: 0 0 0.85rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.1s forwards;
}

.hero-lead {
  max-width: 34rem;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  color: var(--ink-soft);
  margin: 0 0 1.75rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.28s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise-in 0.9s var(--ease) 0.42s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1.15rem;
  border-radius: 0.55rem;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.98rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s ease, color 0.2s ease;
}

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

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

.btn-primary:hover {
  background: var(--brand-deep);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
  color: var(--brand-deep);
}

.btn[disabled],
.btn.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4rem 1.25rem;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section h2 {
  font-family: Georgia, "Source Han Serif TC", "Noto Serif TC", "Songti TC",
    serif;
  font-size: clamp(1.55rem, 3vw, 2rem);
  margin: 0 0 0.75rem;
  color: var(--brand-deep);
}

.section .lede {
  max-width: 40rem;
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.feature-list li {
  padding-left: 1.1rem;
  position: relative;
  color: var(--ink);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.plan {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, var(--mist) 100%);
  border-radius: 0.85rem;
  padding: 1.35rem 1.25rem 1.25rem;
}

.plan h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.plan .price {
  font-family: Georgia, "Source Han Serif TC", "Noto Serif TC", serif;
  font-size: 1.85rem;
  color: var(--brand-deep);
  margin: 0.35rem 0 0.75rem;
}

.plan .price small {
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.plan p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.note-box {
  margin-top: 1.25rem;
  padding: 0.9rem 1rem;
  background: var(--warn-soft);
  border: 1px solid #f0d7a8;
  border-radius: 0.65rem;
  color: #6a4b12;
  font-size: 0.95rem;
}

.legal-placeholder {
  max-width: 42rem;
  margin: 0 auto;
  padding: 4rem 1.25rem 5rem;
}

.legal-placeholder h1 {
  font-family: Georgia, "Source Han Serif TC", "Noto Serif TC", serif;
  font-size: clamp(1.7rem, 3.5vw, 2.2rem);
  margin: 0 0 1rem;
  color: var(--brand-deep);
}

.placeholder-notice {
  padding: 1.1rem 1.2rem;
  background: var(--accent-soft);
  border: 1px solid #b7ddd6;
  border-radius: 0.75rem;
  color: var(--brand-deep);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #e8f1f3;
  padding: 2.5rem 1.25rem 2rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 1.25rem;
}

.footer-brand {
  font-family: Georgia, "Source Han Serif TC", "Noto Serif TC", serif;
  color: var(--brand-deep);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: var(--brand-deep);
}

.footer-copy {
  color: var(--ink-soft);
  font-size: 0.88rem;
}

@keyframes rise-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 0.35rem 0 0.5rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-wrap {
    flex-wrap: wrap;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding-top: 3.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-brand,
  .hero-lead,
  .hero-actions {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .btn:hover {
    transform: none;
  }
}