/* ======================================================
   CSS-MUUTTUJAT
   ====================================================== */
:root {
  /* Värit */
  --clr-primary:        #1E6FD9;
  --clr-primary-dark:   #1558B0;
  --clr-primary-faint:  rgba(30, 111, 217, 0.11);
  --clr-footer:         #0B2A4A;
  --clr-heading:        #0F1E30;
  --clr-text:           #4A5568;
  --clr-muted:          #718096;
  --clr-white:          #ffffff;
  --clr-surface:        #F5F7FA;
  --clr-border:         #DDE3EE;
  --clr-success-bg:     #EBF8EE;
  --clr-success-text:   #1A6837;

  /* Välistykset */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.5rem;
  --sp-lg:  2.5rem;
  --sp-xl:  4rem;
  --sp-2xl: 6rem;

  /* Layout */
  --header-h:  72px;
  --radius-sm: 4px;
  --radius-md: 8px;

  /* Typografia */
  --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-body:    'Barlow', 'Segoe UI', system-ui, sans-serif;

  /* Siirtymät */
  --ease:     cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 200ms;
}

/* ======================================================
   RESET & BASE
   ====================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  color: var(--clr-text);
  background: var(--clr-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a        { color: inherit; text-decoration: none; }
ul, ol   { list-style: none; }
button   { cursor: pointer; border: none; background: none; font: inherit; }
address  { font-style: normal; }
img      { max-width: 100%; height: auto; display: block; }

/* ======================================================
   CONTAINER
   ====================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

/* ======================================================
   SECTION-HEADER (jaettu tyyli otsikoille)
   ====================================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--sp-xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.025em;
  color: var(--clr-heading);
  line-height: 1.15;
  display: inline-block;
}

/* Sininen korostusviiva otsikon alle */
.section-title::after {
  content: '';
  display: block;
  width: 44px;
  height: 3px;
  background: var(--clr-primary);
  border-radius: 2px;
  margin: 0.55rem auto 0;
}

.section-lead {
  font-size: 1rem;
  color: var(--clr-muted);
  margin-top: var(--sp-sm);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Palvelualue-teksti yhteystiedot-osion alla */
.service-area {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--sp-sm);
  font-size: 0.85rem;
  color: var(--clr-muted);
  font-style: italic;
}

/* ======================================================
   BUTTONS
   ====================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  transition:
    background-color var(--duration) var(--ease),
    box-shadow       var(--duration) var(--ease),
    transform        var(--duration) var(--ease);
}

.btn-primary {
  background: var(--clr-primary);
  color: var(--clr-white);
  border: 2px solid transparent;
}

.btn-primary:hover {
  background: var(--clr-primary-dark);
  box-shadow: 0 6px 20px rgba(30, 111, 217, 0.36);
  transform: translateY(-2px);
}

.btn-primary:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 4px;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* ======================================================
   HEADER
   ====================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration) var(--ease),
    box-shadow   var(--duration) var(--ease);
}

.site-header.scrolled {
  border-bottom-color: var(--clr-border);
  box-shadow: 0 2px 20px rgba(15, 30, 48, 0.09);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--sp-md);
}

/* --- Logo --- */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  flex-shrink: 0;
  height: 38px;
  width: auto;
  display: block;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  color: var(--clr-heading);
}

/* --- Navigaatio --- */
.main-nav { display: flex; align-items: center; }

.nav-list {
  display: flex;
  gap: var(--sp-lg);
  align-items: center;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--clr-text);
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  transition:
    color        var(--duration) var(--ease),
    border-color var(--duration) var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--clr-primary);
  border-bottom-color: var(--clr-primary);
}

.nav-link:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* --- Hamburger-painike --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: background-color var(--duration) var(--ease);
}

.hamburger:hover         { background: var(--clr-surface); }
.hamburger:focus-visible { outline: 3px solid var(--clr-primary); outline-offset: 2px; }

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--clr-heading);
  border-radius: 2px;
  transform-origin: center;
  transition:
    transform var(--duration) var(--ease),
    opacity   var(--duration) var(--ease);
}

/* X-animaatio auki-tilassa */
.hamburger.open .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open .hamburger-line:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ======================================================
   HERO
   ====================================================== */
.hero {
  position: relative;
  min-height: max(70vh, 500px);
  display: flex;
  align-items: center;
  background-image: url('assets/hero.jpg');
  background-size: cover;
  background-position: center;
  /* Fallback kun kuva ei ole ladattu */
  background-color: var(--clr-footer);
  overflow: hidden;
}

/* Tumma sininen overlay */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(30, 80, 140, 0.55);
  z-index: 1;
}

/* Hienovarainen ruudukkorakenne – teollisuusvisuaali */
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0.06;
  background-image:
    linear-gradient(rgba(255, 255, 255, 1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 1) 1px, transparent 1px);
  background-size: 44px 44px;
}

.hero-content {
  position: relative;
  z-index: 3;
  padding-top: var(--sp-xl);
  padding-bottom: var(--sp-xl);
  max-width: 680px;
}

/* Ympyräbadge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: var(--sp-md);
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-primary);
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0.015em;
  line-height: 1.15;
  color: var(--clr-white);
  margin-bottom: var(--sp-md);
}

.hero-lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255, 255, 255, 0.87);
  margin-bottom: var(--sp-lg);
  line-height: 1.7;
}

/* ======================================================
   PALVELUT
   ====================================================== */
.services {
  padding: var(--sp-2xl) 0;
  background: var(--clr-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
}

.service-card {
  background: var(--clr-white);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow:
    0 1px 3px rgba(15, 30, 48, 0.06),
    0 4px 12px rgba(15, 30, 48, 0.04);
  border-top: 3px solid transparent;
  transition:
    transform       0.25s var(--ease),
    box-shadow      0.25s var(--ease),
    border-top-color 0.25s var(--ease);
  will-change: transform;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow:
    0 8px 24px rgba(15, 30, 48, 0.11),
    0 2px 6px  rgba(15, 30, 48, 0.06);
  border-top-color: var(--clr-primary);
}

.card-icon {
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-faint);
  border-radius: var(--radius-md);
  margin-bottom: var(--sp-md);
  transition: background-color var(--duration) var(--ease);
}

.service-card:hover .card-icon {
  background: rgba(30, 111, 217, 0.17);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--clr-heading);
  margin-bottom: var(--sp-xs);
}

.card-text {
  font-size: 0.94rem;
  color: var(--clr-text);
  line-height: 1.65;
}

/* ======================================================
   YHTEYSTIEDOT
   ====================================================== */
.contact {
  padding: var(--sp-2xl) 0;
  background: var(--clr-white);
}

/* Kolme korttia rinnakkain, allekkain mobiilissa */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-md);
  max-width: 860px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  padding: 2rem var(--sp-md);
  border-top: 3px solid var(--clr-primary);
  transition: box-shadow var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.contact-card:hover {
  box-shadow: 0 6px 20px rgba(15, 30, 48, 0.09);
  transform: translateY(-3px);
}

.contact-card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-primary-faint);
  border-radius: var(--radius-md);
  margin-bottom: var(--sp-sm);
}

.contact-card-label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-muted);
  margin-bottom: 6px;
}

.contact-card-value {
  font-size: 0.97rem;
  color: var(--clr-heading);
  line-height: 1.55;
  font-weight: 500;
  transition: color var(--duration) var(--ease);
}

a.contact-card-value:hover { color: var(--clr-primary); }

a.contact-card-value:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ======================================================
   FOOTER
   ====================================================== */
.site-footer {
  background: var(--clr-footer);
  color: var(--clr-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--sp-sm) 0;
  text-align: center;
}

.footer-copy {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.02em;
}

/* ======================================================
   SCROLL REVEAL -ANIMAATIOT
   ====================================================== */
@media (prefers-reduced-motion: no-preference) {
  .service-card,
  .contact-card {
    opacity: 0;
    transform: translateY(22px);
    transition:
      opacity   0.5s var(--ease),
      transform 0.5s var(--ease);
  }

  .service-card.is-visible,
  .contact-card.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Porrastettu viive korttirivistölle */
  .service-card:nth-child(2) { transition-delay: 0.1s; }
  .service-card:nth-child(3) { transition-delay: 0.2s; }
  .contact-card:nth-child(2) { transition-delay: 0.1s; }
  .contact-card:nth-child(3) { transition-delay: 0.2s; }
}

/* ======================================================
   RESPONSIIVISUUS – Tabletti (≤ 960px)
   ====================================================== */
@media (max-width: 960px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-cards {
    grid-template-columns: 1fr;
    max-width: 420px;
  }
}

/* ======================================================
   RESPONSIIVISUUS – Mobiili (≤ 768px)
   ====================================================== */
@media (max-width: 768px) {
  /* Hamburger esiin */
  .hamburger { display: flex; }

  /* Nav liukuu alas */
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--clr-white);
    border-bottom: 1px solid var(--clr-border);
    box-shadow: 0 8px 24px rgba(15, 30, 48, 0.1);
    padding: var(--sp-md);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition:
      transform   0.28s var(--ease),
      opacity     0.28s var(--ease),
      visibility  0.28s var(--ease);
    z-index: 199;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-sm);
  }

  .nav-link {
    font-size: 1.2rem;
    padding: 6px 0;
  }

}

/* ======================================================
   RESPONSIIVISUUS – Pieni mobiili (≤ 480px)
   ====================================================== */
@media (max-width: 480px) {
  :root {
    --sp-2xl: 4rem;
    --sp-xl:  2.5rem;
  }

  .hero-badge { display: none; }

  .services-grid { grid-template-columns: 1fr; }
  .contact-cards { max-width: 100%; }
}