/* ==========================================================================
   L Arkkitehdit / Muusa T&K - Design System & Base Variables
   Virallinen brändiohje 1.0 (2026) mukainen toteutus
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Familjen+Grotesk:ital,wght@0,400..700;1,400..700&family=Inter+Tight:ital,wght@0,300..700;1,300..700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Brändivärit */
  --sininen:      #2f46de;
  --sininen-hover:#1e33c2;
  --kupari:       #c58750;
  --kupari-hover: #b0743f;
  --terra:        #d17879;
  --hiekka:       #fef4f0;
  --usva:         #d5d6f1;
  --jaa:          #eff2ff;

  /* Neutraalit */
  --muste:        #1a1a2e;
  --harmaa:       #6b6b85;
  --viiva:        #dcdce8;
  --valkoinen:    #ffffff;

  /* Semanttiset alias-tokenit */
  --color-primary:        var(--sininen);
  --color-primary-hover:  var(--sininen-hover);
  --color-special:        var(--kupari);
  --color-special-hover:  var(--kupari-hover);
  --color-terra:          var(--terra);
  --color-bg-base:        var(--hiekka);
  --color-bg-colored:     var(--usva);
  --color-bg-card:        var(--valkoinen);
  --color-bg-card-alt:    var(--jaa);
  --text-primary:         var(--muste);
  --text-secondary:       var(--harmaa);
  --border-subtle:        var(--viiva);

  /* Typografia (Brändiohje 1.0) */
  --font-display: "Familjen Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-main:    "Inter Tight", -apple-system, "Segoe UI", Arial, sans-serif;
  --font-mono:    "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* Mittasuhteet ja pyöristykset */
  --container-max-width: 1240px;
  --header-height: 64px;
  --slide-padding-x: clamp(1.25rem, 3.5vw, 2rem);
  --radius-btn: 8px;     /* Painikkeiden pyöristys: 8px */
  --radius-card: 14px;   /* Laatikoiden ja korttien pyöristys: 14px */
  --radius-full: 9999px;

  /* Siirtymät */
  --transition-fast: 0.18s ease;
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Perusasetukset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden; /* Slide deck mandatory scroll container */
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg-base);
  color: var(--text-primary);
  line-height: 1.65;
}

::selection {
  background-color: var(--color-primary);
  color: #ffffff;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

/* Esityksen pääsäiliö (100vh full-slide deck) */
.presentation-container {
  height: 100vh;
  height: 100dvh;
  width: 100%;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  background-color: var(--color-bg-base);
}

/* Yksittäinen 100vh dia-osio */
.slide-section {
  min-height: 100vh;
  min-height: 100dvh;
  height: 100vh;
  height: 100dvh;
  width: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: calc(var(--header-height) + 1rem) var(--slide-padding-x, 2rem) 4rem;
  overflow: hidden;
  box-sizing: border-box;
}

/* Dia-taustavariaatiot */
.slide-base {
  background-color: var(--color-bg-base); /* Hiekka #fef4f0 */
  color: var(--text-primary);
}

.slide-colored {
  background-color: var(--color-bg-colored); /* Usva #d5d6f1 */
  color: var(--text-primary);
}

/* Aliakset vanhoille luokille */
.slide-dark { background-color: var(--color-bg-colored); color: var(--text-primary); }
.slide-light { background-color: var(--color-bg-base); color: var(--text-primary); }
.slide-grey { background-color: var(--color-bg-colored); color: var(--text-primary); }

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Typografia (Familjen Grotesk, negatiivinen tracking -2%...-3.5%) */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.section-title {
  font-size: clamp(1.75rem, 2.8vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
}

.section-subtitle {
  font-size: clamp(0.9375rem, 1.15vw, 1.05rem);
  font-weight: 400;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 1.25rem;
}

/* Pienet otsakkeet ja etiketit (JetBrains Mono, VERSAALIT, +16% tracking) */
.tag-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-special);
  margin-bottom: 0.6rem;
}

.tag-label::before {
  content: '';
  display: inline-block;
  width: 7px;
  height: 7px;
  background-color: var(--color-special);
  border-radius: 50%;
}

.tag-label.primary {
  color: var(--color-primary);
}
.tag-label.primary::before {
  background-color: var(--color-primary);
}

/* Suuret luvut (JetBrains Mono 700, negatiivinen tracking -4%) */
.t-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.4rem, 4.5vw, 3.5rem);
  letter-spacing: -0.04em;
  color: var(--color-primary);
  line-height: 1;
}

.t-num.copper {
  color: var(--color-special);
}

/* Pisterata (6-dot brand color rail) */
.brand-rail {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.brand-rail span, .brand-rail i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: block;
  font-style: normal;
  flex: 0 0 11px;
}

.brand-rail span:nth-child(1), .brand-rail i:nth-child(1) { background: var(--kupari); }
.brand-rail span:nth-child(2), .brand-rail i:nth-child(2) { background: var(--terra); }
.brand-rail span:nth-child(3), .brand-rail i:nth-child(3) { background: var(--hiekka); box-shadow: inset 0 0 0 1px #e6d9d3; }
.brand-rail span:nth-child(4), .brand-rail i:nth-child(4) { background: var(--sininen); }
.brand-rail span:nth-child(5), .brand-rail i:nth-child(5) { background: var(--usva); }
.brand-rail span:nth-child(6), .brand-rail i:nth-child(6) { background: var(--jaa); box-shadow: inset 0 0 0 1px #dfe4f5; }

/* Painikkeet (8px pyöristys brändiohjeen mukaisesti) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  font-family: var(--font-main);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--valkoinen);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--jaa);
  border-color: var(--color-primary);
}

.btn-secondary-dark, .btn-secondary-light {
  background-color: var(--valkoinen);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary-dark:hover, .btn-secondary-light:hover {
  background-color: var(--jaa);
  border-color: var(--color-primary);
}

.btn-sm {
  padding: 0.42rem 0.95rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
}

/* Badget ja tagit */
.badge-tech {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-btn);
  background-color: var(--jaa);
  border: 1px solid var(--viiva);
  color: var(--muste);
}

.badge-tech.special {
  background-color: var(--valkoinen);
  border-color: var(--kupari);
  color: var(--kupari);
}

.badge-tech.accent {
  background-color: var(--valkoinen);
  border-color: var(--sininen);
  color: var(--sininen);
}