/* ============================================================
   Boring Software — Tighten-inspired design system
   Warm cream + deep teal, Inter sans + Playfair italic wordmark.
   ============================================================ */
:root {
  /* surfaces */
  --bg:          #faf8f3;
  --bg-card:     #ffffff;
  --bg-deep:     #f1ede2;
  --bg-ink:      #1a1d24;

  /* ink */
  --ink:         #1a1d24;
  --ink-soft:    #4a4f5a;
  --ink-muted:   #828897;
  --ink-on-dark: #faf8f3;

  /* accents */
  --teal:        #0a7270;
  --teal-dark:   #054846;
  --teal-light:  #d6efed;
  --peach:       #f9d6c1;
  --peach-deep:  #ef9a73;
  --rust:        #b85a3c;

  /* lines */
  --line:        #e3ddcc;
  --line-soft:   #efe9d8;
  --line-strong: #c5beac;

  /* type system */
  --font-body:    400 1rem/1.6 "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 700 1em/1.15 "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    500 1em/1.4 "JetBrains Mono", ui-monospace, monospace;
  --font-mark:    italic 700 1em/1 "Playfair Display", Georgia, serif;

  /* layout */
  --max:    1200px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 12px;
  --radius-lg: 20px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--teal-light); color: var(--ink); }

/* ============================================================
   Typography
   ============================================================ */
.h-display {
  font: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 4.75rem);
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0;
  overflow-wrap: anywhere;
}
.h-1 {
  font: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
  overflow-wrap: anywhere;
}
.h-2 {
  font: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.625rem, 3vw, 2.25rem);
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0;
}
.h-3 {
  font: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0;
}
.h-4 {
  font: var(--font-heading);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.3;
  margin: 0;
}

.body-lg {
  font-size: clamp(1.0625rem, 1.3vw, 1.1875rem);
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}
.body-md {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}
.body-sm {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}

.label {
  font: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0;
  display: inline-block;
}
.label--muted { color: var(--ink-muted); }

.accent { color: var(--teal); }
.muted { color: var(--ink-muted); }

/* ============================================================
   Layout
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.container--narrow { max-width: 880px; }

.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}
.section--tight {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}
.section--deep {
  background: var(--bg-deep);
}

.section-head {
  display: grid;
  gap: 1.25rem;
  max-width: 760px;
  margin: 0 auto clamp(3rem, 5vw, 4rem);
  text-align: center;
}
.section-head .label { justify-self: center; }

.rule { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ============================================================
   Buttons + links
   ============================================================ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border-radius: 999px;
  border: 1.5px solid var(--teal);
  background: var(--teal);
  color: #fff;
  font-family: "Inter", sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease, transform .15s ease;
  text-decoration: none;
}
.button:hover {
  background: var(--teal-dark);
  border-color: var(--teal-dark);
  transform: translateY(-1px);
}
.button--secondary {
  background: transparent;
  color: var(--teal);
}
.button--secondary:hover {
  background: var(--teal);
  color: #fff;
}
.button--lg { padding: 1.0625rem 2rem; font-size: 1rem; }

.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--teal);
  transition: gap .15s ease, color .15s ease;
}
.cta-link::after {
  content: "→";
  transition: transform .15s ease;
}
.cta-link:hover { gap: 0.75rem; color: var(--teal-dark); }
.cta-link:hover::after { transform: translateX(2px); }

/* ============================================================
   Header
   ============================================================ */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 248, 243, 0.9);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.app-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.125rem;
  padding-bottom: 1.125rem;
}
.app-logo {
  font: var(--font-mark);
  font-size: 1.9rem;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
}
.app-logo--cream { color: var(--peach); }

.app-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.app-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color .15s ease;
}
.app-nav a:hover { color: var(--teal); }
.app-nav .button { color: #fff; }
.app-nav .button:hover { color: #fff; }

.app-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 0.5rem 0.875rem;
  font-family: "Inter", sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--ink);
}

@media (max-width: 880px) {
  .app-nav { display: none; }
  .app-nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.5rem var(--gutter) 2rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }
  .app-nav-toggle { display: inline-flex; }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding-top: clamp(4rem, 8vw, 7rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
  text-align: center;
}
.hero-inner {
  max-width: 880px;
  margin: 0 auto;
  display: grid;
  gap: 1.75rem;
  justify-items: center;
}
.hero-inner .label { margin-bottom: 0.25rem; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 0.75rem;
}

/* ============================================================
   Work / case study grid
   ============================================================ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(1.25rem, 2.5vw, 1.75rem);
}
.work-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  overflow: hidden;
}
.work-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px -16px rgba(20, 22, 26, 0.18);
  border-color: var(--line-strong);
}
.work-card-art {
  aspect-ratio: 16 / 10;
  background: var(--peach);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.work-card-art--teal { background: var(--teal-light); }
.work-card-art--ink { background: var(--ink); color: var(--peach); }
.work-card-art--rust { background: var(--rust); color: #fff; }
.work-card-art-mark {
  font: var(--font-mark);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--ink);
  opacity: 0.9;
  position: relative;
  z-index: 1;
}
.work-card-art--ink .work-card-art-mark { color: var(--peach); opacity: 1; }
.work-card-art--rust .work-card-art-mark { color: #fff; opacity: 1; }
.work-card-art-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(26,29,36,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(26,29,36,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.work-card-body {
  padding: clamp(1.25rem, 2vw, 1.75rem);
  display: grid;
  gap: 0.625rem;
}
.work-card-body .label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
}
.work-card-body h3 {
  font: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0;
}
.work-card-body p {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
}
.work-card-body .cta-link { margin-top: 0.5rem; }

/* ============================================================
   Disciplines / tech focus (3-col text grid)
   ============================================================ */
.disciplines {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(2rem, 4vw, 3rem);
}
.discipline {
  display: grid;
  gap: 0.875rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--ink);
}
.discipline h3 {
  font: var(--font-heading);
  font-weight: 700;
  font-size: 1.375rem;
  letter-spacing: -0.01em;
  margin: 0;
}
.discipline .label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--teal);
}
.discipline p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

/* ============================================================
   Principles grid (numbered)
   ============================================================ */
.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.principle {
  display: grid;
  gap: 0.75rem;
}
.principle .num {
  font: var(--font-mark);
  font-size: 2.25rem;
  color: var(--teal);
  line-height: 1;
}
.principle h3 {
  font: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 0;
}
.principle p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}

/* ============================================================
   Product highlight (Hawfinch shoutout)
   ============================================================ */
.product-highlight {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding: clamp(2.5rem, 5vw, 4rem);
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.product-highlight-art {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background: var(--bg-ink);
  color: var(--peach);
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.product-highlight-art-mark {
  font: var(--font-mark);
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1;
  position: relative;
  z-index: 1;
}
.product-highlight-art::after {
  content: "";
  position: absolute;
  inset: auto -40% -40% auto;
  width: 70%;
  height: 70%;
  border-radius: 50%;
  background: var(--teal);
  opacity: 0.4;
  filter: blur(2px);
}
.product-highlight-copy {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}
@media (max-width: 880px) {
  .product-highlight { grid-template-columns: 1fr; }
}

/* ============================================================
   CTA strip
   ============================================================ */
.cta-strip {
  background: var(--ink);
  color: var(--ink-on-dark);
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-strip::after {
  content: "";
  position: absolute;
  right: -10%;
  top: -30%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: var(--teal);
  opacity: 0.35;
  filter: blur(2px);
}
.cta-strip-copy { position: relative; z-index: 1; display: grid; gap: 0.75rem; max-width: 640px; }
.cta-strip-actions { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.cta-strip .button { background: var(--peach); border-color: var(--peach); color: var(--ink); }
.cta-strip .button:hover { background: #fff; border-color: #fff; color: var(--ink); }
.cta-strip .button--secondary { background: transparent; color: var(--peach); border-color: var(--peach); }
.cta-strip .button--secondary:hover { background: var(--peach); color: var(--ink); }
.cta-strip .label { color: var(--peach); }
@media (max-width: 720px) {
  .cta-strip { grid-template-columns: 1fr; }
}

/* ============================================================
   Quote / testimonial
   ============================================================ */
.quote {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  display: grid;
  gap: 1.5rem;
}
.quote blockquote {
  font: var(--font-heading);
  font-weight: 500;
  font-size: clamp(1.375rem, 2.5vw, 1.875rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}
.quote blockquote::before {
  content: "\201C";
  display: block;
  font: var(--font-mark);
  font-size: 3rem;
  line-height: 0.5;
  color: var(--teal);
  margin-bottom: 1rem;
}
.quote cite {
  font-style: normal;
  font-size: 0.9375rem;
  color: var(--ink-muted);
}

/* ============================================================
   Contact form
   ============================================================ */
.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.contact-copy { display: grid; gap: 1.25rem; align-content: start; }
.contact-form { display: grid; gap: 1rem; }
@media (max-width: 880px) { .contact { grid-template-columns: 1fr; } }

.form-row { display: grid; gap: 0.4rem; }
.form-row label {
  font: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--line-strong);
  background: var(--bg-card);
  border-radius: 8px;
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  color: var(--ink);
}
.form-row textarea { min-height: 140px; resize: vertical; }
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  border-color: var(--teal);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-grid .form-row--full { grid-column: 1 / -1; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }

/* ============================================================
   Footer
   ============================================================ */
.app-footer {
  background: var(--bg-ink);
  color: var(--ink-on-dark);
  padding: clamp(3.5rem, 6vw, 5rem) 0 2rem;
  margin-top: clamp(3rem, 6vw, 5rem);
}
.app-footer .container { display: grid; gap: 3rem; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2.5rem;
}
.footer-col h4 {
  font-family: "Inter", sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 1rem;
  color: var(--peach);
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.625rem; }
.footer-col a {
  color: rgba(250, 248, 243, 0.85);
  font-size: 0.9375rem;
  transition: color .15s ease;
}
.footer-col a:hover { color: var(--peach); }
.footer-brand p {
  color: rgba(250, 248, 243, 0.65);
  max-width: 300px;
  margin: 1rem 0 0;
  line-height: 1.6;
  font-size: 0.9375rem;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(250, 248, 243, 0.12);
  font: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: rgba(250, 248, 243, 0.55);
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .footer-grid { grid-template-columns: 1fr; } }

/* ============================================================
   Helpers
   ============================================================ */
.stack-sm { display: grid; gap: 0.5rem; }
.stack-md { display: grid; gap: 1rem; }
.stack-lg { display: grid; gap: 1.5rem; }
.center { text-align: center; }
.max-prose { max-width: 60ch; }

.skip {
  position: absolute;
  left: 0;
  top: -40px;
  background: var(--ink);
  color: var(--bg);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { top: 0; }