/* ==========================================================================
   Sivut — sivut.site homepage
   Mobile-first, no dependencies, respects prefers-reduced-motion
   ========================================================================== */

/* --------------------------------------------------------------------------
   CUSTOM PROPERTIES
   -------------------------------------------------------------------------- */
:root {
  --clr-bg:       #f6f5f3;
  --clr-surface:  #eeedea;
  --clr-text:     #1a1a1a;
  --clr-text-mid: #555552;
  --clr-text-dim: #6b6b67;
  --clr-accent:   #4a6a8a;
  --clr-accent-h: #3d5a78;
  --clr-border:   #d8d7d3;

  --ff: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --fs-sm:   0.8125rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.375rem;
  --fs-xl:   1.75rem;
  --fs-2xl:  2.25rem;

  --lh: 1.6;
  --lh-tight: 1.3;

  --space-2xs: 0.25rem;
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --container: 40rem;
  --pad: clamp(1.25rem, 5vw, 2rem);
  --header-h: 3.5rem;
  --radius: 0.375rem;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ff);
  font-size: var(--fs-base);
  line-height: var(--lh);
  color: var(--clr-text);
  background: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   ACCESSIBILITY
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Remove outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* --------------------------------------------------------------------------
   CONTAINER
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* --------------------------------------------------------------------------
   HEADER
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 245, 243, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--clr-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo {
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--clr-text);
}

.logo:hover {
  color: var(--clr-accent);
}

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

.header-link {
  font-size: var(--fs-sm);
  color: var(--clr-text-mid);
  transition: color var(--transition);
}

.header-link:hover {
  color: var(--clr-text);
}

/* --------------------------------------------------------------------------
   BUTTONS & LINKS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn-sm {
  font-size: var(--fs-sm);
  padding: 0.5rem 1rem;
}

.btn-primary {
  background: var(--clr-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--clr-accent-h);
}

.link-subtle {
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
  transition: color var(--transition);
}

.link-subtle:hover {
  color: var(--clr-accent);
}

/* --------------------------------------------------------------------------
   HERO
   -------------------------------------------------------------------------- */
.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.eyebrow {
  font-size: var(--fs-sm);
  color: var(--clr-accent);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: clamp(1.75rem, 5vw, var(--fs-2xl));
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.hero-text {
  font-size: var(--fs-md);
  color: var(--clr-text-mid);
  max-width: 34rem;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

/* Hero CSS visual */
.hero-visual {
  position: relative;
  height: 10rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.visual-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
}

.visual-shape--1 {
  width: 7rem;
  height: 7rem;
  background: linear-gradient(135deg, var(--clr-accent), transparent 70%);
  left: 15%;
  top: 10%;
}

.visual-shape--2 {
  width: 5rem;
  height: 5rem;
  background: linear-gradient(200deg, #c9b99a, transparent 70%);
  right: 20%;
  top: 0;
}

.visual-shape--3 {
  width: 9rem;
  height: 9rem;
  border: 1.5px solid var(--clr-border);
  left: 35%;
  top: -10%;
}

/* --------------------------------------------------------------------------
   VALUE ROW
   -------------------------------------------------------------------------- */
.values {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

.value-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
}

.value-item {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-text-mid);
  position: relative;
  padding-left: 1rem;
}

.value-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: var(--clr-accent);
}

/* --------------------------------------------------------------------------
   DEMOS
   -------------------------------------------------------------------------- */
.demos {
  padding: var(--space-3xl) 0;
}

.section-head {
  margin-bottom: var(--space-xl);
}

.section-title {
  font-size: clamp(1.25rem, 3.5vw, var(--fs-xl));
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: -0.015em;
  margin-bottom: var(--space-sm);
}

.section-text {
  font-size: var(--fs-base);
  color: var(--clr-text-mid);
  max-width: 36rem;
}

.demo-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 40rem) {
  .demo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Demo card */
.demo-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--clr-border);
  border-radius: 0.5rem;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.demo-card:hover {
  border-color: var(--clr-accent);
  box-shadow: 0 8px 24px -8px rgba(78, 110, 99, 0.15);
}

/* Preview miniatures */
.demo-preview {
  height: 11rem;
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
}

.demo-preview--warm {
  background: linear-gradient(160deg, #f9f4ec, #f1e7d8);
}

.demo-preview--modern {
  background: #ffffff;
  border-bottom: 1px solid var(--clr-border);
}

.demo-preview--dark {
  background: #1a1a1a;
}

/* Warm preview elements */
.preview-bar--warm {
  width: 3rem;
  height: 0.25rem;
  background: #c8927d;
  border-radius: 1px;
  margin-bottom: var(--space-md);
}

.preview-block--warm-1 {
  width: 60%;
  height: 0.625rem;
  background: #33261c;
  border-radius: 1px;
  margin-bottom: var(--space-xs);
}

.preview-block--warm-2 {
  width: 40%;
  height: 0.625rem;
  background: #d3c0a8;
  border-radius: 1px;
  margin-bottom: var(--space-lg);
}

.preview-lines span {
  display: block;
  height: 0.25rem;
  background: #e6d9c7;
  border-radius: 1px;
  margin-bottom: 0.375rem;
}

.preview-lines span:nth-child(1) { width: 90%; }
.preview-lines span:nth-child(2) { width: 75%; }
.preview-lines span:nth-child(3) { width: 55%; }

/* Modern preview elements */
.preview-bar--modern {
  width: 2.5rem;
  height: 0.25rem;
  background: #4a6a8a;
  border-radius: 1px;
  margin-bottom: var(--space-md);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.375rem;
}

.preview-block--modern-1,
.preview-block--modern-2,
.preview-block--modern-3,
.preview-block--modern-4 {
  height: 2.25rem;
  border-radius: 4px;
}

.preview-block--modern-1 { background: #e8eef5; }
.preview-block--modern-2 { background: #f4f6f8; border: 1px solid #e1e6ed; }
.preview-block--modern-3 { background: #f4f6f8; border: 1px solid #e1e6ed; }
.preview-block--modern-4 { background: #4a6a8a; }

/* Dark preview elements */
.preview-bar--dark {
  width: 2.5rem;
  height: 0.25rem;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 1px;
  margin-bottom: var(--space-md);
}

.preview-accent-line {
  width: 4rem;
  height: 0.125rem;
  background: #c9b99a;
  margin-bottom: var(--space-lg);
}

.preview-block--dark-1 {
  width: 50%;
  height: 0.5rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 1px;
  margin-bottom: var(--space-md);
}

.preview-lines--light span {
  display: block;
  height: 0.2rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 1px;
  margin-bottom: 0.375rem;
}

.preview-lines--light span:nth-child(1) { width: 85%; }
.preview-lines--light span:nth-child(2) { width: 70%; }
.preview-lines--light span:nth-child(3) { width: 50%; }

/* Demo info */
.demo-info {
  padding: var(--space-lg);
}

.demo-name {
  font-size: var(--fs-base);
  font-weight: 700;
  margin-bottom: var(--space-2xs);
}

.demo-desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
  margin-bottom: var(--space-sm);
}

.demo-cta {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-accent);
}

.demo-card:hover .demo-cta {
  color: var(--clr-accent-h);
}

/* --------------------------------------------------------------------------
   PROCESS
   -------------------------------------------------------------------------- */
.process {
  padding: var(--space-2xl) 0 var(--space-3xl);
  border-top: 1px solid var(--clr-border);
}

.process .section-title {
  margin-bottom: var(--space-xl);
}

.process-steps {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.process-step {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--clr-accent);
  flex-shrink: 0;
}

.step-text {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--clr-text-mid);
}

.process-note {
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
  max-width: 36rem;
  line-height: var(--lh);
}

/* --------------------------------------------------------------------------
   CONTACT
   -------------------------------------------------------------------------- */
.contact {
  padding: var(--space-3xl) 0;
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  text-align: center;
}

.contact .section-title {
  margin-bottom: var(--space-md);
}

.contact-text {
  font-size: var(--fs-md);
  color: var(--clr-text-mid);
  max-width: 34rem;
  margin: 0 auto var(--space-xl);
  line-height: var(--lh);
}

.contact .btn {
  margin-bottom: var(--space-lg);
}

.contact-details {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.contact-link {
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
  transition: color var(--transition);
}

.contact-link:hover {
  color: var(--clr-accent);
}

.contact-sep {
  color: var(--clr-border);
}

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--clr-border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-xs) var(--space-lg);
}

.footer-copy,
.footer-note {
  font-size: var(--fs-sm);
  color: var(--clr-text-dim);
}

/* --------------------------------------------------------------------------
   REDUCED MOTION
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------------------
   LARGE SCREENS
   -------------------------------------------------------------------------- */
@media (min-width: 48rem) {
  :root {
    --header-h: 4rem;
  }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }

  .hero-visual {
    height: 12rem;
  }
}