/* ============================================================
   BigLobster — Design System
   ============================================================ */

/* 1. Custom Properties */
:root {
  --bg-base:       #F7F8FA;
  --bg-surface:    #FFFFFF;
  --bg-subtle:     #EEF0F4;
  --text-primary:  #111318;
  --text-secondary:#4A5063;
  --text-muted:    #8A91A4;
  --accent:        #B8391C;
  --accent-hover:  #9C2F16;
  --accent-teal:   #D4622A;
  --accent-light:  #FAECEA;
  --border:        #DDE1E9;

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;

  --type-hero:  clamp(2.4rem, 6vw, 5.25rem);
  --type-h2:    clamp(1.75rem, 3.5vw, 3rem);
  --type-h3:    clamp(1.1rem, 1.8vw, 1.4rem);

  --container-max: 1240px;
  --pad:           clamp(1.25rem, 5vw, 2.5rem);

  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08);

  --ease: cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --bg-base:       #0E1117;
  --bg-surface:    #161B26;
  --bg-subtle:     #1D2333;
  --text-primary:  #EDF0F7;
  --text-secondary:#9BA3B8;
  --text-muted:    #5A6278;
  --accent:        #D94F2E;
  --accent-hover:  #B8391C;
  --accent-teal:   #E07A50;
  --accent-light:  #2A1410;
  --border:        #252D3F;
  --shadow-sm: 0 1px 4px rgba(0,0,0,.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,.28);
}

/* 2. Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 62.5%; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1.6rem;
  line-height: 1.65;
  color: var(--text-secondary);
  background: var(--bg-base);
  transition: background .3s var(--ease), color .3s var(--ease);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }
input, textarea { font: inherit; }

/* 3. Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1.6rem;
  padding: .8rem 1.6rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 1.4rem;
  font-weight: 600;
  z-index: 9999;
  transition: top .2s;
}
.skip-link:focus { top: 1.6rem; }

/* 4. Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* 5. Topnav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg-base) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.topnav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 6.4rem;
  gap: 2.4rem;
}
.topnav__logo {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text-primary);
  letter-spacing: -.02em;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: .6rem;
}
.topnav__logo-img { display: block; flex-shrink: 0; }
.topnav__nav { display: none; gap: 3.2rem; }
@media (min-width: 768px) { .topnav__nav { display: flex; } }
.nav-link {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color .2s;
  position: relative;
  padding-bottom: .4rem;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width .25s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link.active::after, .nav-link:hover::after { width: 100%; }
.topnav__actions { display: flex; align-items: center; gap: 1.2rem; }

/* 6. Icon buttons */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.8rem;
  height: 3.8rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: background .2s, color .2s;
}
.btn-icon:hover { background: var(--bg-subtle); color: var(--text-primary); }
.btn-icon:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-icon svg { width: 2rem; height: 2rem; }

/* 7. Hamburger */
.hamburger { flex-direction: column; gap: .55rem; }
@media (min-width: 768px) { .hamburger { display: none; } }
.hamburger span {
  display: block;
  width: 2.2rem; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .25s;
}
.hamburger.open span:nth-child(1) { transform: translateY(.75rem) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-.75rem) rotate(-45deg); }

/* 8. Mobile nav overlay */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--bg-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3.2rem;
  transform: translateX(100%);
  transition: transform .3s var(--ease);
}
.mobile-nav.open { transform: none; }
.mobile-nav__link {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  color: var(--text-primary);
  transition: color .2s;
}
.mobile-nav__link:hover { color: var(--accent); }

/* 9. Views (SPA) */
.view { display: none; }
.view--active { display: block; }
.view-enter { animation: viewIn .35s var(--ease) forwards; }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

/* 10. Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  padding: 1.2rem 2.4rem;
  background: var(--accent);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background .2s, transform .15s, box-shadow .2s;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--accent) 35%, transparent);
}
.btn-primary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s;
}
.btn-ghost:hover { color: var(--text-primary); }
.btn-ghost:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* 11. Hero */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; overflow: hidden; }
#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero__content { position: relative; z-index: 1; padding-block: 12rem 8rem; max-width: 80rem; }
.hero__label { font-size: 1.2rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 2.4rem; }
.hero__title { font-family: var(--font-display); font-size: var(--type-hero); line-height: 1.08; color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 2.4rem; }
.hero__sub { font-size: clamp(1.6rem, 2vw, 1.9rem); font-weight: 300; color: var(--text-secondary); max-width: 52rem; line-height: 1.6; margin-bottom: 3.6rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 1.6rem; align-items: center; }

/* 12. Proof strip */
.proof-strip { background: var(--bg-subtle); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding-block: 2rem; transition: background .3s var(--ease); }
.proof-strip__inner { display: flex; align-items: center; gap: 3.2rem; overflow-x: auto; scrollbar-width: none; white-space: nowrap; }
.proof-strip__inner::-webkit-scrollbar { display: none; }
.proof-strip__label { font-size: 1.2rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; flex-shrink: 0; }
.proof-strip__list { display: flex; gap: 3.2rem; align-items: center; }
.proof-strip__list span { font-size: 1.4rem; font-weight: 500; color: var(--text-muted); opacity: .7; }

/* 13. Section header */
.section-header { margin-bottom: 6.4rem; }
.section-label { font-size: 1.2rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.6rem; }
.section-header h2, .home-services h2 { font-family: var(--font-display); font-size: var(--type-h2); line-height: 1.15; color: var(--text-primary); letter-spacing: -.02em; }

/* 14. Home services grid */
.home-services { padding-block: 10rem; }
.services-grid { display: grid; grid-template-columns: 1fr; gap: 4rem; }
@media (min-width: 768px) {
  .services-grid { grid-template-columns: repeat(12, 1fr); gap: 3.2rem 4rem; }
  .service-item:nth-child(1) { grid-column: 1 / 8; }
  .service-item:nth-child(2) { grid-column: 7 / 13; margin-top: 5.6rem; }
  .service-item:nth-child(3) { grid-column: 1 / 6; }
}
.service-item { padding-top: 2.4rem; border-top: 1px solid var(--border); }
.service-num { display: block; font-size: 3.6rem; font-weight: 200; color: var(--text-muted); line-height: 1; margin-bottom: 1.6rem; font-variant-numeric: tabular-nums; }
.service-item h3 { font-size: var(--type-h3); font-weight: 600; color: var(--text-primary); margin-bottom: 1.2rem; }
.service-item p { font-size: 1.5rem; line-height: 1.7; margin-bottom: 2rem; }
.link-arrow {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--accent);
  transition: gap .2s;
  display: inline-flex;
  gap: .4rem;
}
.link-arrow:hover { gap: .8rem; }

/* 15. Differentiator */
.differentiator { padding-block: 10rem; background: var(--bg-surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); transition: background .3s var(--ease); }
.differentiator__inner { display: grid; grid-template-columns: 1fr; gap: 4.8rem; }
@media (min-width: 1024px) { .differentiator__inner { grid-template-columns: 10rem 1fr; gap: 8rem; } }
.differentiator__line { width: 2px; height: 8rem; background: var(--accent-teal); border-radius: 2px; margin-top: .8rem; }
.differentiator__content h2 { font-family: var(--font-display); font-size: var(--type-h2); line-height: 1.15; color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 3.2rem; }
.differentiator__content p { font-size: 1.65rem; line-height: 1.8; color: var(--text-secondary); max-width: 64rem; margin-bottom: 2rem; }
.differentiator__content p:last-child { margin-bottom: 0; }

/* 16. CTA band */
.cta-band { padding-block: 10rem; text-align: center; background: var(--bg-surface); transition: background .3s var(--ease); }
.cta-band__inner { max-width: 72rem; margin-inline: auto; }
.cta-band h2 { font-family: var(--font-display); font-size: clamp(2rem, 3.5vw, 3.2rem); color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 1.6rem; }
.cta-band p { font-size: 1.7rem; font-weight: 300; color: var(--text-secondary); margin-bottom: 3.2rem; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 1.6rem; justify-content: center; align-items: center; }

/* 17. Page hero (inner pages) */
.page-hero { padding-block: 10rem 7.2rem; border-bottom: 1px solid var(--border); }
.page-hero--compact { padding-block: 5rem 3.2rem; border-bottom: none; }
.page-hero h1 { font-family: var(--font-display); font-size: var(--type-hero); line-height: 1.1; color: var(--text-primary); letter-spacing: -.025em; margin-bottom: 2.4rem; max-width: 76rem; }
.page-hero__sub { font-size: clamp(1.6rem, 2vw, 1.9rem); font-weight: 3; color: var(--text-secondary); max-width: 54rem; line-height: 1.6; }

/* 18. Services detail page */
.services-detail { padding-block: 8rem; }
.service-detail { display: grid; grid-template-columns: 1fr; gap: 3.2rem; padding-block: 6.4rem; border-bottom: 1px solid var(--border); }
@media (min-width: 768px) { .service-detail { grid-template-columns: 10rem 1fr; gap: 6.4rem; } .service-detail--alt { grid-template-columns: 1fr 10rem; } .service-detail--alt .service-detail__meta { order: 2; } .service-detail--alt .service-detail__body { order: 1; } }
.service-num-lg { font-size: 5.6rem; font-weight: 200; color: var(--text-muted); line-height: 1; font-variant-numeric: tabular-nums; opacity: .4; }
.service-detail h2 { font-family: var(--font-display); font-size: clamp(2rem, 3vw, 2.8rem); color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 1.6rem; }
.service-detail p { font-size: 1.65rem; line-height: 1.8; color: var(--text-secondary); margin-bottom: 2.4rem; max-width: 64rem; }
.service-detail ul { display: flex; flex-direction: column; gap: .8rem; }
.service-detail li { font-size: 1.45rem; color: var(--text-secondary); padding-left: 1.6rem; position: relative; }
.service-detail li::before { content: ''; position: absolute; left: 0; top: .9rem; width: .6rem; height: .6rem; background: var(--accent-teal); border-radius: 50%; }

/* 19. Process */
.process { padding-block: 8rem; background: var(--bg-subtle); transition: background .3s var(--ease); }
.process-steps { display: grid; grid-template-columns: 1fr; gap: 3.2rem; counter-reset: steps; }
@media (min-width: 768px) { .process-steps { grid-template-columns: repeat(4, 1fr); gap: 2.4rem; } }
.process-step { padding: 2.4rem; background: var(--bg-surface); border-radius: var(--radius-md); border: 1px solid var(--border); transition: border-color .2s, box-shadow .2s; }
.process-step:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.process-step__num { display: block; width: 3.2rem; height: 3.2rem; background: var(--accent-light); color: var(--accent); font-size: 1.3rem; font-weight: 700; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; margin-bottom: 1.6rem; }
.process-step h3 { font-size: 1.6rem; font-weight: 600; color: var(--text-primary); margin-bottom: .8rem; }
.process-step p { font-size: 1.45rem; line-height: 1.65; color: var(--text-secondary); }

/* 20. Pricing */
.pricing-content { padding-block: 8rem; }
.pricing-prose { max-width: 72rem; margin-bottom: 7.2rem; }
.pricing-prose h2 { font-family: var(--font-display); font-size: clamp(2rem, 3vw, 2.8rem); color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 2.4rem; }
.pricing-prose p { font-size: 1.65rem; line-height: 1.85; color: var(--text-secondary); margin-bottom: 2rem; }
.pricing-principles { display: grid; grid-template-columns: 1fr; gap: 2.4rem; margin-bottom: 7.2rem; padding-top: 4.8rem; border-top: 1px solid var(--border); }
@media (min-width: 640px) { .pricing-principles { grid-template-columns: repeat(3, 1fr); } }
.principle { padding: 2.8rem; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--bg-surface); transition: background .3s var(--ease); }
.principle h3 { font-size: 1.6rem; font-weight: 600; color: var(--text-primary); margin-bottom: 1rem; }
.principle p { font-size: 1.45rem; line-height: 1.65; color: var(--text-secondary); }

/* 21. FAQ */
.faq-section { padding-top: 4.8rem; border-top: 1px solid var(--border); }
.faq-section h2 { font-family: var(--font-display); font-size: clamp(1.75rem, 2.5vw, 2.4rem); color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 3.2rem; }
.faq { display: flex; flex-direction: column; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-toggle { width: 100%; display: flex; justify-content: space-between; align-items: center; padding-block: 2rem; font-size: 1.6rem; font-weight: 500; color: var(--text-primary); text-align: left; gap: 1.6rem; transition: color .2s; }
.faq-toggle:hover { color: var(--accent); }
.faq-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.faq-icon { font-size: 2rem; font-weight: 300; color: var(--text-muted); transition: transform .25s var(--ease), color .2s; flex-shrink: 0; line-height: 1; }
.faq-toggle[aria-expanded="true"] .faq-icon { transform: rotate(45deg); color: var(--accent); }
.faq-answer { font-size: 1.5rem; line-height: 1.75; color: var(--text-secondary); padding-bottom: 2rem; max-width: 72rem; }
.faq-answer[hidden] { display: none; }

/* 22. Contact */
.contact-content { padding-block: 8rem; }
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 6.4rem; }
@media (min-width: 1024px) { .contact-grid { grid-template-columns: 1fr 38rem; } }
.contact-form { display: flex; flex-direction: column; gap: 2.4rem; }
.form-field { display: flex; flex-direction: column; gap: .8rem; }
.form-field label { font-size: 1.4rem; font-weight: 500; color: var(--text-primary); }
.form-field input,
.form-field textarea { padding: 1.2rem 1.6rem; background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius-md); color: var(--text-primary); font-size: 1.5rem; transition: border-color .2s, box-shadow .2s, background .3s var(--ease); width: 100%; }
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-muted); }
.form-field input:focus,
.form-field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.form-field textarea { resize: vertical; min-height: 14rem; }
.btn-submit { align-self: flex-start; }
.form-success { font-size: 1.5rem; color: var(--accent-teal); font-weight: 500; padding: 1.2rem 1.6rem; background: color-mix(in srgb, var(--accent-teal) 12%, transparent); border-radius: var(--radius-md); }
.contact-info h2 { font-family: var(--font-display); font-size: clamp(1.75rem, 2.5vw, 2.2rem); color: var(--text-primary); letter-spacing: -.02em; margin-bottom: 1.6rem; }
.contact-email { font-size: 1.7rem; font-weight: 500; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.contact-email:hover { color: var(--accent-hover); }
.contact-note { margin-top: 1.6rem; font-size: 1.45rem; line-height: 1.7; color: var(--text-muted); }

/* 23. Footer */
.site-footer { border-top: 1px solid var(--border); padding-block: 3.2rem; margin-top: auto; transition: border-color .3s var(--ease); }
.site-footer__inner { display: flex; flex-direction: column; gap: 2rem; align-items: flex-start; }
@media (min-width: 640px) { .site-footer__inner { flex-direction: row; align-items: center; justify-content: space-between; } }
.site-footer__logo { font-family: var(--font-display); font-size: 1.8rem; color: var(--text-primary); }
.site-footer__nav { display: flex; gap: 2.4rem; flex-wrap: wrap; }
.site-footer__nav a { font-size: 1.4rem; color: var(--text-muted); transition: color .2s; }
.site-footer__nav a:hover { color: var(--text-primary); }
.site-footer__copy { font-size: 1.3rem; color: var(--text-muted); }

/* ==== Blog Typography Enhancements ==== */
.blog-post, .article-body { max-width: 70ch; margin-inline: auto; line-height: 1.8; }
.article-body p { margin-bottom: 1.5rem; }
.article-body h2 { margin-top: 2rem; margin-bottom: 0.8rem; }
.article-body h3 { margin-top: 1.75rem; margin-bottom: 0.8rem; }
.article-meta { font-size: 0.85rem; color: var(--text-muted); opacity: 0.85; margin-bottom: 1.6rem; }
.article-body ul,
.article-body ol { margin-bottom: 1.5rem; padding-left: 2rem; }
.article-body li { margin-bottom: 0.4rem; }
.article-body img { display: block; max-width: 100%; margin: 1.6rem auto; }
/* ==== End Blog Typography ==== */

/* 24. Scroll reveal */
.reveal { opacity: 0; transform: translateY(2rem); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* 25. Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ==== Accessibility enhancements (append) ==== */
/* Focus-visible outlines for interactive elements */
.nav-link:focus-visible,
.link-arrow:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
/* Remove default outline when focus is not visible (mouse click) */
*:focus:not(:focus-visible) {
  outline: none;
}
/* Hover state for navigation links – accent color */
.nav-link:hover {
  color: var(--accent);
}
/* Hover state for link arrows – accent color */
.link-arrow:hover {
  color: var(--accent);
}
/* Ensure pointer cursor for button-like links */
.btn-primary,
.btn-ghost,
.btn-icon {
  cursor: pointer;
}