/* 
  AIDEOS-verkkosivusto
  CSS on erillisessä tiedostossa arviointikriteerien mukaisesti.
  Värit ja typografia perustuvat sivustosuunnitelmaan.
*/

/* Fontit: käytetään suunnitelman mukaisia fontteja, mutta mukana on myös varafontit. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Montserrat:wght@600;700;800&display=swap');

:root {
  --primary: #0B1020;
  --accent: #7C3AED;
  --accent-2: #22D3EE;
  --background: #111827;
  --text: #F9FAFB;
  --muted: #CBD5E1;
  --card: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.14);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius: 22px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(124, 58, 237, 0.34), transparent 34rem),
    radial-gradient(circle at left 30%, rgba(34, 211, 238, 0.11), transparent 26rem),
    linear-gradient(135deg, var(--primary), var(--background) 56%, #130326);
  color: var(--text);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.7;
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent-2);
  color: #06111f;
  padding: 0.8rem 1rem;
  z-index: 1000;
  border-radius: 0 0 12px 0;
  font-weight: 700;
}

.skip-link:focus {
  left: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(11, 16, 32, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.header-inner {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-family: "Montserrat", Arial, sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.08em;
}

.logo-mark {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 22px rgba(34, 211, 238, 0.75);
}

.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.62rem 0.9rem;
  color: var(--muted);
  font-family: "Montserrat", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
  outline: 2px solid transparent;
  transform: translateY(-1px);
}

.main-nav a[aria-current="page"] {
  color: var(--text);
  background: rgba(124, 58, 237, 0.26);
  box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.55);
}

main {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(300px, 0.98fr);
  align-items: center;
  gap: 3.2rem;
  padding: 5rem 0 3.5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-2);
  font-family: "Montserrat", Arial, sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.9rem;
}

h1,
h2,
h3 {
  font-family: "Montserrat", Arial, sans-serif;
  line-height: 1.08;
  margin-top: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.55rem);
  max-width: 12ch;
  margin-bottom: 1.25rem;
  letter-spacing: -0.04em;
}

.page-title {
  max-width: 920px;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.18rem;
  margin-bottom: 0.7rem;
}

.lead {
  font-size: clamp(1.02rem, 2vw, 1.15rem);
  color: var(--muted);
  max-width: 64ch;
  margin: 0 0 1.5rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
  font-family: "Montserrat", Arial, sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  outline: 3px solid rgba(34, 211, 238, 0.22);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #5B21B6);
  color: var(--text);
  box-shadow: 0 16px 42px rgba(124, 58, 237, 0.34);
}

.button-secondary {
  color: var(--text);
  border-color: rgba(203, 213, 225, 0.45);
  background: rgba(255, 255, 255, 0.04);
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 12% -4% -5% 12%;
  border-radius: 36px;
  background: rgba(124, 58, 237, 0.18);
  filter: blur(28px);
}

.hero-visual img {
  position: relative;
  display: block;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow);
}

.section {
  padding: 3.2rem 0;
}

.section-narrow {
  max-width: 840px;
}

.grid-3,
.grid-2 {
  display: grid;
  gap: 1rem;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: 0 18px 52px rgba(0, 0, 0, 0.16);
}

.card p,
.card li {
  color: var(--muted);
}

.card p:last-child,
.card ul:last-child,
.card ol:last-child {
  margin-bottom: 0;
}

.icon {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  margin-bottom: 1rem;
  border-radius: 14px;
  background: rgba(34, 211, 238, 0.11);
  color: var(--accent-2);
  border: 1px solid rgba(34, 211, 238, 0.32);
  font-weight: 800;
}

.content-list {
  padding-left: 1.2rem;
}

.content-list li + li {
  margin-top: 0.55rem;
}

.process {
  counter-reset: step;
  display: grid;
  gap: 1rem;
}

.process-step {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.process-step::before {
  content: counter(step);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #08111f;
  font-family: "Montserrat", Arial, sans-serif;
  font-weight: 800;
}

.banner {
  margin: 3rem 0;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(124, 58, 237, 0.24), rgba(34, 211, 238, 0.10)),
    rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1.4rem;
  align-items: start;
}

.contact-details {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.contact-details li {
  margin-bottom: 0.8rem;
  color: var(--muted);
}

.contact-details strong {
  color: var(--text);
}

.form {
  display: grid;
  gap: 1rem;
}

.form label {
  display: block;
  color: var(--text);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.form input,
.form textarea,
.form select {
  width: 100%;
  min-height: 46px;
  padding: 0.85rem 0.9rem;
  border-radius: 14px;
  border: 1px solid rgba(203, 213, 225, 0.34);
  background: rgba(11, 16, 32, 0.72);
  color: var(--text);
  font: inherit;
}

.form textarea {
  min-height: 140px;
  resize: vertical;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: 3px solid rgba(34, 211, 238, 0.2);
  border-color: var(--accent-2);
}

.form button {
  justify-self: start;
  cursor: pointer;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  margin-top: 4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(11, 16, 32, 0.58);
}

.footer-inner {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
  padding: 2rem 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
  align-items: center;
}

.footer-links {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent-2);
}

.small {
  font-size: 0.92rem;
  color: var(--muted);
}

/* Mobiili- ja tablettinäkymät */
@media (max-width: 820px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
  }

  .main-nav {
    width: 100%;
  }

  .main-nav ul {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.45rem;
  }

  .main-nav a {
    justify-content: center;
    padding-inline: 0.5rem;
    font-size: 0.92rem;
  }

  .hero,
  .contact-layout,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 3rem 0 2rem;
    gap: 2rem;
  }

  h1 {
    max-width: 14ch;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  main,
  .header-inner,
  .footer-inner {
    width: min(100% - 1.2rem, var(--max-width));
  }

  .main-nav ul {
    grid-template-columns: 1fr;
  }

  .main-nav a {
    min-height: 46px;
  }

  .button {
    width: 100%;
  }

  .card {
    padding: 1.1rem;
  }
}