/* =========================================================
   ML Digital Solutions — style.css
   AI-automaatiot & verkkosivut · technical dark identity
   ========================================================= */

:root {
  --bg:        #0A0B0D;
  --bg-2:      #0E0F12;
  --surface:   #131418;
  --surface-2: #181A1F;
  --surface-3: #1E2026;
  --border:    rgba(255, 255, 255, 0.08);
  --border-2:  rgba(255, 255, 255, 0.14);
  --text:      #F3F4F6;
  --text-dim:  #9B9EA5;
  --text-mute: #5F636B;
  --accent:    #C6FF3D;   /* signal lime */
  --accent-dk: #A8E22C;
  --accent-ink:#0A0B0D;
  --glow:      rgba(198, 255, 61, 0.28);

  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --wrap: 1200px;
  --pad: clamp(1.25rem, 5vw, 4.5rem);
  --r: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: clamp(1rem, 0.94rem + 0.25vw, 1.0625rem);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* dotted grid + ambient glow */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.035) 1px, transparent 0);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 70%);
}
body::after {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(50% 40% at 85% -5%, rgba(198,255,61,0.10), transparent 65%);
}

::selection { background: var(--accent); color: var(--accent-ink); }
a { color: inherit; text-decoration: none; }
svg { display: block; }

/* ---------- helpers ---------- */
.grad {
  background: linear-gradient(100deg, var(--accent), #7CE0A0 60%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.12em; color: var(--text-dim);
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 var(--glow); animation: ping 2.4s ease-out infinite;
}
@keyframes ping {
  0% { box-shadow: 0 0 0 0 var(--glow); }
  70%,100% { box-shadow: 0 0 0 8px transparent; }
}

/* ---------- progress ---------- */
.scroll-progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 200; }
.scroll-progress span { display: block; height: 100%; width: 0%; background: var(--accent); box-shadow: 0 0 12px var(--glow); transition: width 0.1s linear; }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 150;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem var(--pad);
  backdrop-filter: blur(14px) saturate(140%);
  background: color-mix(in srgb, var(--bg) 68%, transparent);
  border-bottom: 1px solid transparent; transition: border-color 0.3s;
}
.nav.is-stuck { border-color: var(--border); }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); }
.brand__logo { width: 30px; height: 30px; color: var(--accent); flex: none; }
.brand__logo svg { width: 100%; height: 100%; }
.brand__text { font-family: var(--font-head); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand__dim { color: var(--text-dim); font-weight: 400; }

.nav__links { display: flex; align-items: center; gap: 2rem; }
.nav__links a { font-size: 0.9rem; font-weight: 500; color: var(--text-dim); transition: color 0.2s; }
.nav__links a:not(.nav__cta):hover { color: var(--text); }
.nav__cta {
  color: var(--accent-ink) !important; background: var(--accent);
  padding: 0.55rem 1.15rem; border-radius: 8px; font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.nav__cta:hover { transform: translateY(-1px); box-shadow: 0 10px 26px -10px var(--glow); background: var(--accent-dk); }

.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav__toggle span { width: 26px; height: 2px; background: var(--text); transition: 0.3s; }
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  max-width: var(--wrap); margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) var(--pad) clamp(2.5rem, 5vw, 4rem);
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero__title {
  font-family: var(--font-head); font-weight: 600;
  font-size: clamp(2.3rem, 5.2vw, 4.1rem); line-height: 1.06; letter-spacing: -0.025em;
  margin: 1.5rem 0 0;
}
.hero__lead { font-size: clamp(1.02rem, 1.2vw, 1.18rem); color: var(--text-dim); max-width: 48ch; margin-top: 1.5rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.5rem; border-radius: 10px; font-weight: 600; font-size: 0.95rem;
  font-family: var(--font-body);
  transition: transform 0.2s, background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -14px var(--glow); background: var(--accent-dk); }
.btn--ghost { border: 1px solid var(--border-2); color: var(--text); background: var(--surface); }
.btn--ghost:hover { background: var(--surface-2); border-color: var(--text-dim); transform: translateY(-2px); }
.btn--lg { padding: 1rem 1.9rem; font-size: 1.02rem; }

.hero__trust { display: flex; align-items: center; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; font-size: 0.85rem; color: var(--text-mute); }
.hero__trust i { width: 4px; height: 4px; border-radius: 50%; background: var(--text-mute); }

/* pipeline visual */
.pipe {
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border); border-radius: 18px; overflow: hidden;
  box-shadow: 0 40px 80px -40px rgba(0,0,0,0.8);
}
.pipe__head { display: flex; align-items: center; gap: 0.8rem; padding: 0.8rem 1rem; border-bottom: 1px solid var(--border); background: var(--bg-2); }
.pipe__dotrow { display: flex; gap: 6px; }
.pipe__dotrow i { width: 10px; height: 10px; border-radius: 50%; background: var(--surface-3); }
.pipe__dotrow i:first-child { background: #ff5f57; opacity: 0.7; }
.pipe__label { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-mute); }
.pipe__body { padding: 1.3rem; display: flex; flex-direction: column; }

.node {
  display: flex; align-items: center; gap: 0.8rem; position: relative;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 12px; padding: 0.8rem 0.95rem;
}
.node b { font-size: 0.92rem; font-weight: 600; display: block; }
.node small { font-size: 0.76rem; color: var(--text-dim); }
.node__ico {
  width: 34px; height: 34px; flex: none; display: grid; place-items: center;
  border-radius: 9px; background: var(--surface-3); font-size: 1rem; color: var(--text);
}
.node--ai { border-color: color-mix(in srgb, var(--accent) 45%, transparent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent), 0 0 30px -6px var(--glow); }
.node--ai .node__ico { background: var(--accent); color: var(--accent-ink); }
.node__badge {
  margin-left: auto; font-family: var(--font-mono); font-size: 0.65rem; font-weight: 500;
  color: var(--accent-ink); background: var(--accent); padding: 0.15rem 0.45rem; border-radius: 5px;
}
.node--out .node__ico { background: color-mix(in srgb, var(--accent) 22%, var(--surface-3)); color: var(--accent); }
.node-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem; }
.node--sm { padding: 0.65rem 0.7rem; }
.node--sm b { font-size: 0.82rem; }
.node--sm .node__ico { width: 28px; height: 28px; font-size: 0.85rem; }

.wire { height: 26px; position: relative; margin-left: 17px; width: 2px; background: var(--border-2); }
.wire--split { height: 30px; }
.pulse {
  position: absolute; left: 50%; top: 0; transform: translateX(-50%);
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 10px var(--glow);
  animation: flow 2.6s cubic-bezier(.5,0,.5,1) infinite;
}
.pulse--2 { animation-delay: 0.5s; }
.pulse--3 { animation-delay: 1s; }
@keyframes flow { 0% { top: -4px; opacity: 0; } 20% { opacity: 1; } 80% { opacity: 1; } 100% { top: 100%; opacity: 0; } }

/* ---------- STATS BAND ---------- */
.band {
  max-width: var(--wrap); margin: 0 auto;
  padding: clamp(1.5rem, 3vw, 2rem) var(--pad);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--r);
  overflow: hidden;
}
.band__item { background: var(--bg); padding: 1.6rem 1.4rem; display: flex; flex-direction: column; gap: 0.35rem; }
.band__num { font-family: var(--font-head); font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 600; letter-spacing: -0.02em; color: var(--accent); line-height: 1; }
.band__label { font-size: 0.85rem; color: var(--text-dim); }

/* ---------- section head ---------- */
.sec-head { max-width: var(--wrap); margin: 0 auto; padding: clamp(4rem, 8vw, 6.5rem) var(--pad) clamp(2rem, 3vw, 2.5rem); }
.sec-head__tag { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; color: var(--accent); }
.sec-head__title { font-family: var(--font-head); font-weight: 600; font-size: clamp(1.9rem, 4vw, 3rem); letter-spacing: -0.02em; line-height: 1.08; margin: 0.9rem 0 0; max-width: 20ch; }
.sec-head__desc { color: var(--text-dim); font-size: 1.05rem; margin-top: 1rem; max-width: 52ch; }

/* ---------- PILLARS ---------- */
.pillars__grid { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.25rem, 2.5vw, 1.75rem); }
.pillar {
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
  padding: clamp(1.6rem, 3vw, 2.4rem);
  position: relative; overflow: hidden;
  transition: transform 0.35s cubic-bezier(.2,.7,.2,1), border-color 0.35s;
}
.pillar::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), transparent 70%); transform: scaleX(0); transform-origin: left; transition: transform 0.5s cubic-bezier(.2,.7,.2,1); }
.pillar:hover { transform: translateY(-5px); border-color: var(--border-2); }
.pillar:hover::before { transform: scaleX(1); }
.pillar__top { display: flex; align-items: center; justify-content: space-between; }
.pillar__no { font-family: var(--font-mono); color: var(--text-mute); font-size: 0.9rem; }
.pillar__ico { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: var(--surface-3); color: var(--accent); font-size: 1.4rem; }
.pillar__title { font-family: var(--font-head); font-weight: 600; font-size: clamp(1.5rem, 2.5vw, 1.9rem); letter-spacing: -0.015em; margin: 1.3rem 0 0.7rem; }
.pillar__desc { color: var(--text-dim); }
.pillar__list { list-style: none; margin: 1.5rem 0 0; display: flex; flex-direction: column; }
.pillar__list li { padding: 0.9rem 0; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 0.15rem; }
.pillar__list li span { font-weight: 600; font-size: 0.98rem; display: flex; align-items: center; gap: 0.55rem; }
.pillar__list li span::before { content: "→"; color: var(--accent); font-size: 0.9rem; }
.pillar__list li small { color: var(--text-mute); font-size: 0.83rem; padding-left: 1.35rem; }
.pillar__link { display: inline-block; margin-top: 1.6rem; font-weight: 600; color: var(--accent); font-size: 0.95rem; transition: gap 0.2s, opacity 0.2s; }
.pillar__link:hover { opacity: 0.75; }

/* ---------- PROCESS ---------- */
.steps { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1.6rem 1.4rem; position: relative; transition: transform 0.3s, background 0.3s, border-color 0.3s; }
.step:hover { transform: translateY(-4px); background: var(--surface-2); border-color: var(--border-2); }
.step__no { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); }
.step h3 { font-family: var(--font-head); font-weight: 600; font-size: 1.2rem; margin: 1.4rem 0 0.6rem; letter-spacing: -0.01em; }
.step p { font-size: 0.92rem; color: var(--text-dim); }
.step__meta { display: inline-block; margin-top: 1rem; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-mute); border: 1px solid var(--border); border-radius: 6px; padding: 0.25rem 0.5rem; }

/* ---------- WORK / CASES ---------- */
.cases { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.case { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 1.7rem 1.5rem; transition: transform 0.35s, border-color 0.35s; }
.case:hover { transform: translateY(-5px); border-color: var(--border-2); }
.case__metric { display: flex; align-items: baseline; gap: 0.55rem; padding-bottom: 1.2rem; margin-bottom: 1.2rem; border-bottom: 1px solid var(--border); }
.case__metric span { font-family: var(--font-head); font-weight: 700; font-size: clamp(2rem, 4vw, 2.8rem); color: var(--accent); letter-spacing: -0.02em; line-height: 1; }
.case__metric small { color: var(--text-dim); font-size: 0.85rem; }
.case h3 { font-family: var(--font-head); font-weight: 600; font-size: 1.25rem; letter-spacing: -0.01em; }
.case p { color: var(--text-dim); font-size: 0.93rem; margin-top: 0.6rem; }
.case__tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 1.2rem; }
.case__tags li { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-dim); border: 1px solid var(--border); border-radius: 6px; padding: 0.22rem 0.55rem; }

/* ---------- WHY ---------- */
.why { border-top: 1px solid var(--border); margin-top: clamp(4rem, 8vw, 6.5rem); background: radial-gradient(60% 100% at 100% 0%, rgba(198,255,61,0.06), transparent 60%), var(--bg-2); }
.why__inner { max-width: var(--wrap); margin: 0 auto; padding: clamp(4rem, 9vw, 7rem) var(--pad); }
.why__kicker { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; color: var(--accent); }
.why__statement { font-family: var(--font-head); font-weight: 500; font-size: clamp(1.7rem, 3.6vw, 2.9rem); line-height: 1.22; letter-spacing: -0.02em; margin-top: 1.3rem; max-width: 24ch; }
.why__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; margin-top: clamp(3rem, 6vw, 4.5rem); max-width: 900px; }
.why__grid b { font-family: var(--font-head); font-size: 1.1rem; display: block; margin-bottom: 0.5rem; }
.why__grid p { color: var(--text-dim); font-size: 0.95rem; }

/* ---------- CTA ---------- */
.cta { padding: clamp(4rem, 9vw, 7rem) var(--pad); }
.cta__inner {
  max-width: 820px; margin: 0 auto; text-align: center;
  border: 1px solid var(--border-2); border-radius: 28px;
  padding: clamp(3rem, 7vw, 5rem) clamp(1.5rem, 5vw, 4rem);
  background: radial-gradient(90% 130% at 50% 0%, rgba(198,255,61,0.12), transparent 60%), var(--surface);
}
.cta__title { font-family: var(--font-head); font-weight: 600; font-size: clamp(2rem, 4.5vw, 3.4rem); letter-spacing: -0.025em; line-height: 1.08; margin: 1.2rem 0 0; }
.cta__lead { color: var(--text-dim); margin: 1.2rem auto 0; max-width: 46ch; }
.cta .btn { margin-top: 2rem; }
.cta__email { display: block; margin-top: 1.4rem; font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-dim); transition: color 0.2s; }
.cta__email:hover { color: var(--accent); }

/* ---------- FOOTER ---------- */
.footer { border-top: 1px solid var(--border); padding: clamp(2.5rem, 5vw, 3.5rem) var(--pad) 1.5rem; }
.footer__inner { max-width: var(--wrap); margin: 0 auto; display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 2rem; }
.footer__brand p { color: var(--text-mute); font-size: 0.9rem; margin-top: 0.7rem; max-width: 34ch; }
.footer__nav, .footer__social { display: flex; flex-direction: column; gap: 0.7rem; }
.footer__nav a, .footer__social a { font-size: 0.9rem; color: var(--text-dim); transition: color 0.2s; }
.footer__nav a:hover, .footer__social a:hover { color: var(--accent); }
.footer__base { max-width: var(--wrap); margin: 2.5rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; font-size: 0.82rem; color: var(--text-mute); }
.footer__base a:hover { color: var(--accent); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s cubic-bezier(.2,.7,.2,1), transform 0.7s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .hero__col--visual { order: 2; max-width: 480px; }
  .pillars__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .cases { grid-template-columns: 1fr; }
  .band { grid-template-columns: repeat(2, 1fr); }
  .why__grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .nav__links {
    position: fixed; inset: 60px 0 auto 0; flex-direction: column; align-items: flex-start;
    gap: 1.3rem; padding: 1.8rem var(--pad); background: var(--bg-2); border-bottom: 1px solid var(--border);
    transform: translateY(-130%); transition: transform 0.35s cubic-bezier(.2,.7,.2,1);
  }
  .nav__links.is-open { transform: none; }
  .nav__toggle { display: flex; }
  .brand__dim { display: none; }
  .steps { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, .pulse { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}