/* ============================================================
   control-deck — teemademo (Rakennustoimisto Kivilinja, kuvitteellinen)
   Lämmin paperi + kova musta, hiusviivamittaristo, olivimusteaksentti.
   Käsin kirjoitettu CSS, ei kehystä, ei buildia.
   ============================================================ */

@font-face {
  font-family: 'DM Sans';
  src: url('assets/fonts/dm-sans-variable-latin.woff2') format('woff2');
  font-weight: 100 1000;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'DM Mono';
  src: url('assets/fonts/dm-mono-400-latin.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'DM Mono';
  src: url('assets/fonts/dm-mono-500-latin.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #FFFDFB;
  --ink: #111111;
  --ink-soft: #161614;
  --rule: #E6E4DC;
  --rule-dark: #2E2E2C;
  --muted: #6E6A64;        /* 5.29:1 paperilla */
  --muted-dark: #A9A6A0;   /* 7.78:1 mustalla */
  --olive: #465700;        /* 7.89:1 paperilla */
  --olive-lt: #A9BE5E;     /* 9.18:1 mustalla */
  --pad-y: clamp(3.5rem, 8vw, 8rem);
  --pad-x: clamp(1.15rem, 4vw, 4.5rem);
  --sans: 'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'DM Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

img, svg, picture { max-width: 100%; }
img { display: block; }
a { color: inherit; }

h1, h2, h3, h4 { font-weight: 500; margin: 0; }

.mono {
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -100px;
  z-index: 99;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.7rem 1rem;
  text-decoration: none;
}
.skip-link:focus { top: 0.75rem; }

:focus-visible {
  outline: 2px solid var(--olive);
  outline-offset: 3px;
}

/* ── Luonnosbanneri ─────────────────────────────────────────── */
.demo-banner {
  display: block;
  background: var(--ink);
  color: var(--paper);
  text-align: center;
  padding: 0.6rem 1rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
}
.demo-banner b { color: var(--olive-lt); font-weight: 500; }

/* ── Navigaatio ─────────────────────────────────────────────── */
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem 1.5rem;
  padding: 1rem var(--pad-x);
  border-bottom: 1px solid var(--rule);
}
.nav-mark {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.03em;
  text-decoration: none;
  margin-right: auto;
}
.nav-mark-suffix { color: var(--muted); }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1rem;
}
.nav-links a {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--olive); }

.nav-clock {
  margin: 0;
  display: flex;
  gap: 0.55rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.nav-clock-time { color: var(--ink); }

/* ── Luvut / chapterit ──────────────────────────────────────── */
.chapter {
  position: relative;
  z-index: 1;
  padding: var(--pad-y) var(--pad-x);
}
.chapter--paper { background: var(--paper); color: var(--ink); }
.chapter--black { background: var(--ink); color: var(--paper); }

.chapter-head { max-width: 44rem; }
.label {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0 0 1.1rem;
}
.chapter--black .label { color: var(--olive-lt); }

.chapter-head h2 {
  font-size: clamp(2.1rem, 6vw, 3.5rem);
  line-height: 0.98;
  letter-spacing: -0.025em;
}
.chapter-lede {
  max-width: 40ch;
  margin: 1.4rem 0 0;
  color: var(--muted);
}

/* ── 01 · Mittaristo-hero ───────────────────────────────────── */
.deck-grid {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

.tile { margin: 0; }
.tile picture {
  display: block;
  width: min(260px, 64vw);
  height: 150px;
  overflow: hidden;
  border-radius: 10px;
  background: var(--rule);
}
.tile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 38%;
  filter: grayscale(1) contrast(1.08);
  animation: ken 24s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes ken {
  from { transform: scale(1.02); }
  to   { transform: scale(1.16) translate(-2.5%, -2%); }
}
.tile-cap {
  margin: 0.6rem 0 0;
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.rules { margin: 1.6rem 0; display: grid; gap: 0.55rem; }
.rules i { display: block; height: 1px; background: var(--rule); }
.rules i:nth-child(2) { width: 74%; }
.rules i:nth-child(3) { width: 42%; }

.caps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.caps li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--rule);
  padding: 0.4rem 0.7rem;
  font-size: 0.66rem;
  letter-spacing: 0.09em;
  color: var(--ink);
}
.caps li::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--olive);
  flex: none;
}

.deck-right {
  min-width: 0;
  border-top: 1px solid var(--rule);
  padding-top: 1.8rem;
}
.tag {
  margin: 0 0 1.4rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.tag-c { color: var(--olive); font-size: 1.05rem; line-height: 1; }
.tag-year { color: var(--olive); }

.deck-intro {
  max-width: 450px;
  margin: 0 0 1.8rem;
  font-size: 1rem;
  color: var(--muted);
}
.deck-statement {
  max-width: 14ch;
  margin: 0 0 1.6rem;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
}
.deck-meta {
  margin: 0;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* Kaksitasoinen jättiliikemerkki */
.wordmark {
  margin: clamp(2.5rem, 6vw, 5rem) 0 0;
  font-weight: 500;
  line-height: 0.85;
  letter-spacing: -0.045em;
}
.wordmark-1 {
  display: block;
  font-size: clamp(3.2rem, 11vw, 11.5rem);
}
.wordmark-2 {
  display: flex;
  align-items: center;
  gap: 0.1em;
  font-size: clamp(3.2rem, 11vw, 11.5rem);
  color: var(--muted);
}
.twin {
  height: 0.4em;
  width: auto;
  flex: none;
  fill: var(--olive);
}

/* Hero-alalaidan kromi */
.chrome {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
  align-items: center;
  justify-content: space-between;
}
.chrome-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
}
.chrome-links li + li {
  border-left: 1px solid var(--rule);
  margin-left: 0.85rem;
  padding-left: 0.85rem;
}
.chrome-links a {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-decoration: none;
}
.chrome-links a:hover, .chrome-links a:focus-visible { color: var(--olive); }

.chip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  border: 1px solid var(--rule);
  padding: 0.55rem 0.9rem 0.55rem 0.6rem;
}
.chip:hover { border-color: var(--olive); }
.chip-avatar {
  width: 38px; height: 38px;
  flex: none;
  border-radius: 50%;
  overflow: hidden;
  display: block;
}
.chip-avatar svg { width: 100%; height: 100%; display: block; }
.chip-avatar circle:first-child { fill: var(--olive); }
.chip-head { fill: var(--paper); }
.chip-text { display: grid; gap: 0.1rem; }
.chip-text b { font-size: 0.92rem; font-weight: 500; letter-spacing: -0.015em; }
.chip-text .mono { font-size: 0.6rem; letter-spacing: 0.12em; color: var(--muted); }

/* ── 02 · Palvelut (musta) ──────────────────────────────────── */
.svc { margin-top: clamp(2.5rem, 6vw, 4.5rem); }

.svc-title {
  font-size: clamp(2rem, 8vw, 3rem);
  line-height: 0.95;
  letter-spacing: -0.035em;
  margin: 0 0 1.1rem;
  color: var(--paper);
}

.svc-card {
  border: 1px solid var(--rule-dark);
  background: var(--ink-soft);
  padding: clamp(1.3rem, 3.5vw, 2.2rem);
}
.svc-item + .svc-item { margin-top: 2.6rem; }

.svc-num {
  margin: 0 0 0.9rem;
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--olive-lt);
}
.svc-card h4 {
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.8rem;
}
.svc-card p { margin: 0 0 1.1rem; color: var(--muted-dark); }
.svc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule-dark);
}
.svc-list li {
  border-bottom: 1px solid var(--rule-dark);
  padding: 0.6rem 0 0.6rem 1.1rem;
  position: relative;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--muted-dark);
}
.svc-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 1.03em;
  width: 5px; height: 5px;
  background: var(--olive-lt);
}

.svc-media { margin: 1.6rem 0 0; }
.svc-media img {
  width: 100%;
  height: clamp(200px, 30vw, 400px);
  object-fit: cover;
  filter: grayscale(1) contrast(1.1);
}
.svc-media figcaption {
  margin-top: 0.55rem;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--muted-dark);
}

/* ── Kiinnitetty kuvakaista ─────────────────────────────────── */
.band {
  position: sticky;
  top: 0;
  z-index: 0;
  height: 58vh;
  min-height: 300px;
  overflow: hidden;
  background: var(--ink);
}
.band picture { display: block; height: 100%; }
.band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 92%;
  filter: grayscale(1) contrast(1.14) brightness(0.84);
}
.band-cap {
  position: absolute;
  left: var(--pad-x);
  bottom: 1.5rem;
  margin: 0;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--paper);
  background: rgba(17, 17, 17, 0.82);
  padding: 0.45rem 0.7rem;
}

/* ── 03 · Prosessitikkaat ───────────────────────────────────── */
.ladder-chapter::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to bottom, var(--rule) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(to right, var(--rule) 0 1px, transparent 1px 12.5%);
}
.ladder-chapter > * { position: relative; z-index: 1; }

.photo-note {
  max-width: 46rem;
  margin: 0 0 2.5rem;
  border-left: 3px solid var(--olive);
  background: var(--paper);
  padding: 0.9rem 1.1rem;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--muted);
}
.photo-note strong { color: var(--ink); font-weight: 500; }

.ladder {
  list-style: none;
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  padding: 0;
}
.rung {
  position: sticky;
  top: calc(0.9rem + var(--i) * 0.7rem);
}
.rung + .rung { margin-top: 2.4rem; }
.rung-inner {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--olive);
  padding: clamp(1.3rem, 3.5vw, 2.4rem);
  display: grid;
  gap: 0.4rem clamp(1.2rem, 3.5vw, 3rem);
}
.rung-num {
  font-size: clamp(3rem, 10vw, 7rem);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.rung-body h3 {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 0.7rem;
}
.rung-body p { margin: 0 0 0.9rem; color: var(--muted); max-width: 46ch; }
.rung-meta {
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  color: var(--olive);
  margin: 0;
}

/* ── 04 · Tietoa ────────────────────────────────────────────── */
.about-grid {
  margin-top: clamp(2.2rem, 5vw, 3.5rem);
  display: grid;
  gap: 2.5rem;
}
.about-text p { margin: 0 0 1.1rem; color: var(--muted-dark); max-width: 52ch; }

.stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule-dark);
  border: 1px solid var(--rule-dark);
}
.stats > div { background: var(--ink); padding: 1.1rem 1rem; }
.stats dt {
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  color: var(--muted-dark);
  margin-bottom: 0.35rem;
}
.stats dd {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 500;
}

/* ── 05 · Yhteys ────────────────────────────────────────────── */
.contact-grid {
  margin-top: clamp(2.2rem, 5vw, 3.5rem);
  display: grid;
  gap: 2.5rem;
}
.info { margin: 0; border-top: 1px solid var(--rule); }
.info > div {
  display: grid;
  gap: 0.15rem;
  border-bottom: 1px solid var(--rule);
  padding: 0.85rem 0;
}
.info dt {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.info dd { margin: 0; }

.contact-statement {
  margin: 0 0 1.6rem;
  font-size: clamp(1.25rem, 2.6vw, 1.65rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  max-width: 24ch;
}
.btn {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  padding: 0.85rem 1.4rem;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  border: 1px solid var(--ink);
}
.btn:hover, .btn:focus-visible { background: var(--olive); border-color: var(--olive); }
.contact-fine {
  margin: 1.4rem 0 0;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ── Alatunniste ────────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(2.5rem, 6vw, 4rem) var(--pad-x) 1.5rem;
  border-top: 1px solid var(--rule-dark);
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 2rem;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--rule-dark);
}
.footer-mark { margin: 0; font-size: 1rem; letter-spacing: -0.02em; }
.footer-meta { margin: 0; font-size: 0.65rem; letter-spacing: 0.1em; color: var(--muted-dark); }
.footer-meta b { color: var(--olive-lt); font-weight: 500; }
.footer-meta a { color: var(--paper); }

/* Tekoälyilmoitus — ks. webpages/kit/ai-disclosure/ */
.ai-note {
  margin: 1.5rem 0 0;
  max-width: 62ch;
  padding: 0 0 0.5rem;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--muted-dark);
}
.ai-note strong { font-weight: 500; color: var(--paper); }

/* ============================================================
   Työpöytä
   ============================================================ */
@media (min-width: 700px) {
  .deck-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }
  .deck-right {
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--rule);
    padding-left: clamp(1.5rem, 4vw, 3.5rem);
    align-self: stretch;
  }
  .band { height: 72vh; }
  .ladder { max-width: 76rem; }
  .rung-inner {
    grid-template-columns: auto minmax(0, 1fr);
    margin-left: calc(var(--i) * clamp(1rem, 3vw, 3rem));
  }
  .rung-num { text-align: right; }
  .contact-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(2rem, 5vw, 4.5rem); }
  .about-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: clamp(2rem, 5vw, 4.5rem); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rung { top: calc(1.6rem + var(--i) * 2.2rem); }
}

@media (min-width: 900px) {
  /* Kiinnitetty otsikkopalsta + limittyvät kortit */
  .svc.is-pinned {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.15fr);
    grid-template-rows: repeat(4, auto);
    column-gap: clamp(2rem, 5vw, 5rem);
  }
  .svc.is-pinned .svc-item { display: contents; }
  .svc.is-pinned .svc-title {
    grid-column: 1;
    grid-row: 1 / -1;
    align-self: start;
    position: sticky;
    top: 24vh;
    margin: 0;
    font-size: clamp(2.4rem, 4.6vw, 4rem);
    pointer-events: none;
    clip-path: inset(0 100% 0 0);
    transition: clip-path 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
  }
  .svc.is-pinned .svc-title.is-active { clip-path: inset(0 0 0 0); }
  .svc.is-pinned .svc-card { grid-column: 2; }
  .svc.is-pinned .svc-item + .svc-item .svc-card { margin-top: -2.6rem; }
  /* limitys syö vain alapehmusteen, ei sisältöä */
  .svc.is-pinned .svc-item:not(:last-child) .svc-card {
    padding-bottom: calc(clamp(1.3rem, 3.5vw, 2.2rem) + 2.9rem);
  }
  .svc.is-pinned .svc-item:nth-child(1) .svc-card { z-index: 1; }
  .svc.is-pinned .svc-item:nth-child(2) .svc-card { z-index: 2; margin-left: 2.4rem; }
  .svc.is-pinned .svc-item:nth-child(3) .svc-card { z-index: 3; }
  .svc.is-pinned .svc-item:nth-child(4) .svc-card { z-index: 4; margin-left: 2.4rem; }
  .svc.is-pinned .svc-card { position: relative; }
  .svc.is-pinned .svc-item + .svc-item { margin-top: 0; }
}

/* ============================================================
   Liikkeen vähentäminen — kaikki animaatio ja kiinnitys pois
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .tile-img { animation: none !important; transform: none !important; }
  .band { position: static; height: auto; min-height: 0; }
  .band picture { height: auto; }
  .band img { height: 46vh; min-height: 260px; }
  .band-cap { position: static; display: inline-block; margin: 0.6rem var(--pad-x) 1.2rem; }
  .rung { position: static; }
  .svc.is-pinned { display: block; }
  .svc.is-pinned .svc-item { display: block; }
  .svc.is-pinned .svc-item + .svc-item { margin-top: 2.6rem; }
  .svc.is-pinned .svc-card { margin: 0 !important; }
  .svc.is-pinned .svc-title {
    position: static;
    clip-path: none;
    margin: 0 0 1.1rem;
    pointer-events: auto;
  }
}