/* Stonebit Resources — site stylesheet
   Light, refreshing, industrial-minimalistic.
   Archivo (headings), Inter (body), JetBrains Mono (meta).
*/

:root {
  --ink: #0E2A3B;
  --ink-soft: #1F3C4E;
  --paper: #F7F4EE;
  --paper-alt: #FFFFFF;
  --paper-deep: #EFEAE0;
  --steel-700: #3E4E5B;
  --steel-500: #6B7B88;
  --steel-300: #B9C1C8;
  --line: #E2DDD2;
  --line-strong: #CFC9BC;
  --flare: #CF6E2D;
  --flare-soft: #EAC9AD;
  --moss: #3F5A4A;

  --radius: 2px;
  --max: 1320px;
  --gutter: clamp(24px, 5vw, 72px);

  --font-heading: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }

::selection { background: var(--ink); color: var(--paper); }

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.08;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.4rem, 5.2vw, 4.6rem); font-weight: 500; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); }
h3 { font-size: 1.25rem; letter-spacing: 0; line-height: 1.3; }
h4 { font-size: 1rem; letter-spacing: 0.02em; text-transform: uppercase; }

p { margin: 0 0 1em; color: var(--ink-soft); }
.lede { font-size: clamp(1.05rem, 1.4vw, 1.25rem); line-height: 1.55; color: var(--ink-soft); max-width: 56ch; }

.meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-500);
  font-weight: 500;
}

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

/* ---------- Layout primitives ---------- */

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: clamp(72px, 11vw, 140px) 0;
  position: relative;
}

.section--tight { padding: clamp(56px, 9vw, 110px) 0; }
.section--paper-deep { background: var(--paper-deep); }
.section--ink { background: var(--ink); color: var(--paper); }
.section--ink h1, .section--ink h2, .section--ink h3, .section--ink h4 { color: var(--paper); }
.section--ink p, .section--ink .lede { color: #C9D4DC; }
.section--ink .meta { color: var(--flare-soft); }

.grid { display: grid; gap: clamp(24px, 3.2vw, 48px); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--split { grid-template-columns: 5fr 7fr; align-items: center; }
.grid--split-flip { grid-template-columns: 7fr 5fr; align-items: center; }

@media (max-width: 900px) {
  .grid--2, .grid--3, .grid--4, .grid--split, .grid--split-flip {
    grid-template-columns: 1fr;
  }
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 238, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.wordmark__mark {
  width: 26px;
  height: 26px;
  object-fit: contain;
  display: inline-block;
  flex-shrink: 0;
}

.wordmark__dot {
  display: none;
}

.wordmark__sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-500);
  font-weight: 500;
  border-left: 1px solid var(--line-strong);
  padding-left: 10px;
  margin-left: 4px;
}

.nav { display: flex; align-items: center; gap: 2px; }
.nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 0.94rem;
  color: var(--ink);
  transition: color 200ms var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px;
  bottom: 4px;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 280ms var(--ease);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav a[aria-current="page"] { font-weight: 500; }

.nav__cta {
  margin-left: 12px;
  padding: 9px 18px;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  font-size: 0.88rem;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}
.nav__cta:hover { background: var(--ink); color: var(--paper); }
.nav__cta::after { display: none; }
.nav__cta[aria-current="page"] { background: var(--ink); color: var(--paper); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 32px; height: 32px;
  padding: 0;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  margin: 6px 0;
  transition: transform 280ms var(--ease), opacity 280ms var(--ease);
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 260ms var(--ease), opacity 260ms var(--ease);
  }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: 14px var(--gutter); }
  .nav a::after { left: var(--gutter); right: var(--gutter); bottom: 10px; }
  .nav__cta { margin: 10px var(--gutter) 0; text-align: center; }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}
.hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}
.hero__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  animation: heroZoom 2.4s var(--ease) forwards;
}
@keyframes heroZoom { to { transform: scale(1); } }

.hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14,42,59,0.05) 0%, rgba(14,42,59,0.15) 40%, rgba(14,42,59,0.55) 85%, rgba(14,42,59,0.75) 100%);
}

.hero__inner {
  width: 100%;
  padding: clamp(60px, 9vw, 120px) 0;
  color: var(--paper);
}
.hero__inner h1 { color: var(--paper); max-width: 18ch; }
.hero__inner .meta { color: var(--flare-soft); margin-bottom: 20px; }
.hero__inner p { color: #E5E6DF; max-width: 48ch; font-size: clamp(1rem, 1.2vw, 1.15rem); }
.hero__inner .btn-row { margin-top: 32px; }

.hero--tall { min-height: 100vh; }
.hero--short { min-height: 62vh; }
.hero--inset { align-items: center; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease), transform 220ms var(--ease);
}
.btn:hover { background: var(--flare); transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(255,255,255,0.4);
}
.btn--ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

.btn--ink-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--ink-outline:hover { background: var(--ink); color: var(--paper); }

.btn svg { width: 14px; height: 14px; transition: transform 260ms var(--ease); }
.btn:hover svg { transform: translateX(3px); }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Section heading ---------- */

.sect-head { max-width: 720px; margin-bottom: clamp(36px, 4vw, 64px); }
.sect-head .meta { display: block; margin-bottom: 14px; }
.sect-head h2 { margin: 0 0 16px; }

/* ---------- Content cards ---------- */

.card {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  padding: clamp(24px, 2.5vw, 36px);
  border-radius: var(--radius);
  transition: transform 280ms var(--ease), border-color 280ms var(--ease), box-shadow 280ms var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 20px 40px -24px rgba(14,42,59,0.18);
}
.card__index {
  font-family: var(--font-mono);
  color: var(--flare);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
  display: block;
}
.card h3 { margin-bottom: 10px; }
.card p { margin: 0; }

/* Audience tile: large, uses image on top */
.audience {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  overflow: hidden;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  transition: transform 320ms var(--ease), border-color 280ms var(--ease), box-shadow 320ms var(--ease);
}
.audience:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 28px 50px -30px rgba(14,42,59,0.22);
}
.audience__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-deep);
}
.audience__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 900ms var(--ease);
}
.audience:hover .audience__media img { transform: scale(1.04); }
.audience__body { padding: clamp(22px, 2.5vw, 32px); }
.audience__body .meta { margin-bottom: 10px; }
.audience__body h3 { margin-bottom: 10px; }
.audience__body .arrow {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 500;
  font-size: 0.92rem;
}
.audience__body .arrow::after {
  content: "";
  width: 16px; height: 1px;
  background: var(--ink);
  transition: width 260ms var(--ease);
}
.audience:hover .audience__body .arrow::after { width: 28px; }

/* ---------- Split section ---------- */

.split__media img {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  border-radius: var(--radius);
}
.split__media--tall img { aspect-ratio: 4 / 5; }
.split__body h2 { margin-bottom: 18px; }
.split__body .meta { display: block; margin-bottom: 14px; }
.split__body ul {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  gap: 14px;
}
.split__body li {
  padding-left: 22px;
  position: relative;
  color: var(--ink-soft);
}
.split__body li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.66em;
  width: 10px; height: 1px;
  background: var(--flare);
}

/* ---------- Stats strip ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat {
  padding: clamp(28px, 3vw, 48px) clamp(18px, 2vw, 28px);
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat__value {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.6vw, 3rem);
  font-weight: 500;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.stat__label {
  margin-top: 12px;
  color: var(--steel-500);
  font-size: 0.9rem;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); }
  .stat:nth-child(odd) { border-right: 1px solid var(--line); }
  .stat:nth-last-child(-n+2) { border-bottom: 0; }
}

/* ---------- Timeline / numbered process ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.step {
  padding: clamp(24px, 2.6vw, 36px) clamp(16px, 1.6vw, 24px);
  border-right: 1px solid var(--line);
  position: relative;
}
.step:last-child { border-right: 0; }
.step__idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--flare);
  margin-bottom: 16px;
  display: block;
}
.step h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 10px;
}
.step p { font-size: 0.94rem; margin: 0; }

@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: 0; }
}

/* ---------- Media band (full-bleed image) ---------- */

.media-band {
  position: relative;
  height: clamp(360px, 60vh, 620px);
  overflow: hidden;
}
.media-band img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.media-band__caption {
  position: absolute;
  left: var(--gutter);
  bottom: 32px;
  color: var(--paper);
  text-shadow: 0 2px 10px rgba(0,0,0,0.35);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- Page header (for inner pages) ---------- */

.page-head {
  padding: clamp(96px, 14vw, 180px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}
.page-head .meta { display: block; margin-bottom: 18px; }
.page-head h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  max-width: 20ch;
  margin-bottom: 20px;
}
.page-head p { max-width: 60ch; color: var(--ink-soft); font-size: clamp(1.05rem, 1.2vw, 1.2rem); }

/* ---------- Contact ---------- */

.contact-card {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  padding: clamp(28px, 3vw, 40px);
  border-radius: var(--radius);
}
.contact-card .meta { display: block; margin-bottom: 14px; }
.contact-card h3 { margin-bottom: 4px; }
.contact-card .role { color: var(--steel-500); font-size: 0.92rem; }
.contact-card a.email {
  display: inline-block;
  margin-top: 18px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line-strong);
  font-weight: 500;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.contact-card a.email:hover { color: var(--flare); border-color: var(--flare); }

/* ---------- Contact form ---------- */

.contact-form {
  background: var(--paper-alt);
  border: 1px solid var(--line);
  padding: clamp(24px, 3vw, 36px);
  border-radius: var(--radius);
  display: grid;
  gap: 18px;
}
.form-row { display: grid; gap: 6px; }
.form-row label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-500);
  font-weight: 500;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  font-family: var(--font-body);
  font-size: 0.98rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 12px 14px;
  width: 100%;
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
.contact-form textarea { resize: vertical; min-height: 140px; }
.contact-form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%233E4E5B' stroke-width='1.4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(14,42,59,0.08);
}
.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 600px) {
  .form-grid-2 { grid-template-columns: 1fr; }
}
.contact-form button[type="submit"] {
  justify-self: start;
  margin-top: 4px;
}
.form-note {
  font-size: 0.85rem;
  color: var(--steel-500);
  margin: 0;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: clamp(56px, 7vw, 96px) 0 48px;
  border-top: 1px solid var(--line);
  background: var(--paper-alt);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}
.site-footer h4 {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel-500);
  margin-bottom: 16px;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer li a { color: var(--ink-soft); font-size: 0.94rem; transition: color 180ms var(--ease); }
.site-footer li a:hover { color: var(--flare); }
.site-footer__bottom {
  margin-top: clamp(40px, 5vw, 72px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--steel-500);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 700px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}

/* ---------- Reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Utility ---------- */

.stack-sm > * + * { margin-top: 12px; }
.stack-md > * + * { margin-top: 24px; }
.tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 999px;
}
.center { text-align: center; }

/* ---------- CTA band ---------- */

.cta-band {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(64px, 8vw, 110px) 0;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--flare) 30%, var(--flare) 70%, transparent 100%);
  opacity: 0.6;
}
.cta-band h2 { color: var(--paper); max-width: 22ch; }
.cta-band p { color: #C9D4DC; max-width: 52ch; }
.cta-band .meta { color: var(--flare-soft); margin-bottom: 16px; display: block; }
.cta-band__grid { display: grid; grid-template-columns: 7fr 5fr; align-items: center; gap: 48px; }
@media (max-width: 900px) { .cta-band__grid { grid-template-columns: 1fr; } }

/* ---------- Small details ---------- */

.kicker-line {
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--flare);
  vertical-align: middle;
  margin-right: 12px;
}