/* Productyv — productyv.eu
   Editorial indie-studio aesthetic.
   Warm paper, near-black ink, one tobacco accent.
   Serif display (Instrument Serif) + system body + mono detail. */

/* ---------- Tokens ---------- */

:root {
  /* Paper & ink — warm, low-saturation */
  --paper:        #F2EEE6;
  --paper-deep:   #E8E1D2;
  --paper-soft:   #F7F4ED;
  --card:         #FBF9F4;

  --ink:          #15120D;
  --ink-2:        #4C4740;
  --ink-3:        #8B847A;
  --ink-4:        #B5AEA1;

  --rule:         rgba(21, 18, 13, 0.12);
  --rule-strong:  rgba(21, 18, 13, 0.22);

  /* One quiet accent — warm tobacco */
  --accent:       oklch(0.46 0.075 55);
  --accent-soft:  oklch(0.92 0.030 60);
  --accent-deep:  oklch(0.36 0.080 50);

  /* Type stacks */
  --font-display: "Instrument Serif", "Cormorant Garamond", "Iowan Old Style",
                  "Apple Garamond", Georgia, "Times New Roman", serif;
  --font-text:    -apple-system, BlinkMacSystemFont, "SF Pro Text",
                  "Helvetica Neue", "Segoe UI", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Scale */
  --s-1: 4px;  --s-2: 8px;   --s-3: 12px;  --s-4: 16px;
  --s-5: 24px; --s-6: 32px;  --s-7: 48px;  --s-8: 64px;
  --s-9: 96px; --s-10: 144px; --s-11: 192px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:       #14120F;
    --paper-deep:  #1C1915;
    --paper-soft:  #1A1714;
    --card:        #1F1B16;
    --ink:         #F2EDE3;
    --ink-2:       #BFB7A8;
    --ink-3:       #877F72;
    --ink-4:       #5C564C;
    --rule:        rgba(242, 237, 227, 0.10);
    --rule-strong: rgba(242, 237, 227, 0.18);
    --accent:      oklch(0.78 0.075 60);
    --accent-soft: oklch(0.30 0.040 55);
    --accent-deep: oklch(0.88 0.060 65);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* subtle paper grain via dual gradients — almost imperceptible */
  background-image:
    radial-gradient(circle at 12% 4%, color-mix(in oklab, var(--accent-soft) 38%, transparent) 0%, transparent 32%),
    radial-gradient(circle at 92% 88%, color-mix(in oklab, var(--paper-deep) 60%, transparent) 0%, transparent 38%);
  background-attachment: fixed;
}

main { flex: 1 0 auto; }

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

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-strong);
  transition: color 0.15s ease, border-color 0.15s ease;
}
a:hover { color: var(--accent-deep); border-bottom-color: currentColor; }

::selection { background: var(--accent-soft); color: var(--accent-deep); }

/* ---------- Shell ---------- */

.shell {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--s-6);
}

/* ---------- Top bar ---------- */

.topbar {
  padding: var(--s-6) 0 var(--s-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  color: var(--ink);
  border-bottom: none;
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--ink); }
.brand .mark {
  width: 22px;
  height: 22px;
  color: var(--ink);
}
.brand em {
  font-style: italic;
  color: var(--accent-deep);
}

.topnav {
  display: flex;
  gap: var(--s-6);
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.topnav a {
  color: var(--ink-2);
  border-bottom: none;
  font-weight: 500;
}
.topnav a:hover { color: var(--accent-deep); }
.topnav .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  margin-right: 6px;
  vertical-align: 2px;
}

/* ---------- Hero — editorial statement ---------- */

.hero {
  padding: var(--s-10) 0 var(--s-9);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--s-5);
}

.hero-label {
  grid-column: 1 / 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.hero-label .ix {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--ink);
  letter-spacing: -0.02em;
  font-style: italic;
}
.hero-label .ix sup { font-size: 14px; font-style: normal; vertical-align: top; margin-left: 2px; color: var(--ink-3); }

.hero-headline {
  grid-column: 2 / 5;
}
.hero-headline h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}
.hero-headline h1 em {
  font-style: italic;
  color: var(--accent-deep);
}
.hero-headline h1 .amp {
  font-style: italic;
  color: var(--ink-3);
  font-weight: 400;
  padding: 0 0.05em;
}

.hero-body {
  grid-column: 2 / 4;
  margin-top: var(--s-7);
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 50ch;
  text-wrap: pretty;
}
.hero-body p { margin: 0 0 var(--s-4); }
.hero-body p:last-child { margin-bottom: 0; }
.hero-body strong { color: var(--ink); font-weight: 600; }

.hero-meta {
  grid-column: 4 / 5;
  margin-top: var(--s-7);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  align-self: start;
  border-left: 1px solid var(--rule);
  padding-left: var(--s-5);
}
.hero-meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 2px;
}
.hero-meta dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

/* ---------- Section atoms ---------- */

section { padding: var(--s-9) 0; }
section + section { padding-top: 0; }

.divider {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: var(--s-5);
  margin-bottom: var(--s-7);
  align-items: baseline;
}
.section-head .index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
}
.section-head .index::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
  max-width: 22ch;
}
.section-head h2 em { font-style: italic; color: var(--accent-deep); }

/* ---------- Portfolio ---------- */

.portfolio {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--s-5);
}

.portfolio.single {
  grid-template-columns: 1fr;
  max-width: 760px;
}

.product-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: var(--s-7);
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: var(--s-5);
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.product-card:hover {
  border-color: var(--rule-strong);
}
.product-card a.cover {
  position: absolute;
  inset: 0;
  border: none;
  z-index: 1;
}

.product-card .head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--s-4);
}
.product-card .id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.product-card .status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 5px 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.product-card .status::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.product-card .icon-wrap {
  width: 84px;
  height: 84px;
  border-radius: 19px;
  overflow: hidden;
  background: var(--paper-deep);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.4) inset,
    0 12px 28px -14px rgba(21, 18, 13, 0.30);
}
.product-card .icon-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.product-card .body h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 42px;
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-3);
  color: var(--ink);
}
.product-card .body h3 em { font-style: italic; color: var(--accent-deep); }
.product-card .body .tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 22px;
  color: var(--ink-2);
  margin: 0 0 var(--s-4);
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.product-card .body p {
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.6;
  max-width: 48ch;
}

.product-card .specs {
  display: flex;
  gap: var(--s-5);
  flex-wrap: wrap;
  padding-top: var(--s-5);
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.product-card .specs span { color: var(--ink-2); }
.product-card .specs strong { color: var(--ink); font-weight: 500; }

.product-card .visit {
  position: relative;
  z-index: 2;
  margin-top: var(--s-2);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
  border-bottom: none;
  width: max-content;
}
.product-card .visit .arrow {
  transition: transform 0.2s ease;
}
.product-card:hover .visit .arrow { transform: translateX(4px); }

/* "Up next" placeholder card — quieter */
.product-card.placeholder {
  background: transparent;
  border: 1px dashed var(--rule-strong);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--s-7);
  min-height: 100%;
}
.product-card.placeholder .icon-wrap {
  width: 64px; height: 64px;
  border-radius: 14px;
  background:
    repeating-linear-gradient(45deg,
      transparent 0 6px,
      color-mix(in oklab, var(--ink-3) 18%, transparent) 6px 7px);
  box-shadow: none;
  display: grid;
  place-items: center;
  color: var(--ink-3);
}
.product-card.placeholder h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: 30px;
  color: var(--ink-2);
  margin: 0 0 var(--s-3);
  letter-spacing: -0.015em;
  line-height: 1.1;
}
.product-card.placeholder p {
  color: var(--ink-3);
  font-size: 15px;
  margin: 0;
  line-height: 1.55;
  max-width: 32ch;
}
.product-card.placeholder .id { color: var(--ink-3); }

/* ---------- Principles ---------- */

.principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--s-8);
  row-gap: 0;
  border-top: 1px solid var(--rule);
}
.principle {
  padding: var(--s-6) 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--s-4);
  align-items: baseline;
}
.principle .n {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  padding-top: 4px;
}
.principle h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 26px;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 var(--s-3);
  color: var(--ink);
  text-wrap: balance;
}
.principle h3 em { font-style: italic; color: var(--accent-deep); }
.principle p {
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.6;
  max-width: 40ch;
}

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

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-7);
  padding: var(--s-8) 0 var(--s-9);
  align-items: end;
}
.contact .invite {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(34px, 4.5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.022em;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}
.contact .invite em { font-style: italic; color: var(--accent-deep); }
.contact .channels {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  margin: 0;
}
.contact .channels dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 2px;
}
.contact .channels dd {
  margin: 0 0 var(--s-3);
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.contact .channels dd a {
  color: var(--ink);
  border-bottom: 1px solid var(--rule-strong);
}
.contact .channels dd a:hover { color: var(--accent-deep); }

/* ---------- Colophon footer ---------- */

footer.colophon {
  border-top: 1px solid var(--rule);
  padding: var(--s-6) 0 var(--s-7);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
footer.colophon .row {
  display: flex;
  justify-content: space-between;
  gap: var(--s-5);
  align-items: center;
  flex-wrap: wrap;
}
footer.colophon .links {
  display: flex;
  gap: var(--s-5);
}
footer.colophon a {
  color: var(--ink-3);
  border-bottom: none;
}
footer.colophon a:hover { color: var(--accent-deep); }

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr 3fr;
    padding: var(--s-9) 0 var(--s-8);
  }
  .hero-label { grid-column: 1 / 2; }
  .hero-headline { grid-column: 2 / 3; }
  .hero-body { grid-column: 2 / 3; }
  .hero-meta { grid-column: 2 / 3; padding-left: 0; border-left: none; border-top: 1px solid var(--rule); padding-top: var(--s-5); flex-direction: row; gap: var(--s-7); flex-wrap: wrap; }

  .portfolio { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; column-gap: 0; }
  .contact { grid-template-columns: 1fr; gap: var(--s-6); }
  .section-head { grid-template-columns: 1fr; gap: var(--s-3); }
}

@media (max-width: 640px) {
  .shell { padding: 0 var(--s-4); }
  .topbar { padding: var(--s-5) 0; }
  .topnav { gap: var(--s-4); font-size: 11px; }
  .hero { grid-template-columns: 1fr; padding: var(--s-7) 0 var(--s-7); gap: var(--s-5); }
  .hero-label, .hero-headline, .hero-body, .hero-meta { grid-column: 1 / -1; }
  .hero-meta { flex-direction: column; gap: var(--s-4); }
  .product-card { padding: var(--s-5); }
  .product-card .body h3 { font-size: 34px; }
  .product-card .body .tagline { font-size: 19px; }
  .principle { grid-template-columns: 40px 1fr; }
  footer.colophon .row { flex-direction: column; align-items: flex-start; gap: var(--s-3); }
}