/* ============================================
   vondru — Arctic Frost, Architektur/Real Estate
   Pure CSS conversion (no React, no Tailwind)
   ============================================ */

:root {
  --radius: 0.875rem;

  --frost-50:  #f4f8fb;
  --frost-100: #e8f0f8;
  --frost-200: #b8d4e8;
  --frost-300: #8fb7d1;
  --frost-500: #6ba3c8;
  --frost-700: #2e6b8a;
  --ink:       #0f1a24;

  --bg: #fafcfe;
  --fg: var(--ink);
  --card: #ffffff;
  --muted: #64748b;
  --border: #dbe6ef;

  --font-display: "Urbanist", ui-sans-serif, system-ui, sans-serif;
  --font-sans:    "Epilogue", ui-sans-serif, system-ui, sans-serif;

  --gradient-mesh:
    radial-gradient(1200px 800px at 15% 10%, rgba(184,212,232,.7), transparent 60%),
    radial-gradient(900px 700px at 85% 20%, rgba(143,183,209,.55), transparent 60%),
    radial-gradient(800px 900px at 50% 100%, rgba(107,163,200,.25), transparent 60%);

  --gradient-text: linear-gradient(115deg, var(--ink) 0%, var(--frost-700) 45%, var(--frost-500) 100%);

  --shadow-frost:
    0 30px 80px -30px rgba(46,107,138,.3),
    0 2px 6px -1px rgba(46,107,138,.12);

  --noise-url: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.18 0 0 0 0 0.42 0 0 0 0 0.54 0 0 0 0.35 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.35'/></svg>");
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
::selection { background: var(--frost-700); color: #fff; }

.container { max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .container { padding: 0 1.5rem; } }
@media (min-width: 1024px){ .container { padding: 0 2.5rem; } }

.italic { font-style: italic; }
.gradient {
  background-image: var(--gradient-text);
  background-clip: text; -webkit-background-clip: text;
  color: transparent;
  font-weight: 300;
}
.bold { font-weight: 600; }
.muted { color: var(--muted); }
.max-sm { max-width: 22rem; }

.eyebrow {
  font-size: 12px; text-transform: uppercase;
  letter-spacing: .3em; color: var(--frost-700);
}
.eyebrow.light { color: var(--frost-200); }

.h-md  { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em; font-size: clamp(1.75rem,3vw,3rem); margin: .75rem 0 0; }
.h-lg  { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em; font-size: clamp(2rem,3.5vw,3rem); margin: 1rem 0 0; }
.h-xl  { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.03em; font-size: clamp(2.25rem,4.5vw,3.75rem); margin: .75rem 0 0; line-height: 1.05; }
.h-xxl { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.04em; font-size: clamp(3rem,7vw,6rem); margin: 1.5rem 0 0; line-height: 1; }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.5rem; margin-bottom: 3.5rem; }
.section-head.split { align-items: flex-end; flex-wrap: wrap; }

/* ---------- decorative backgrounds ---------- */
.bg-mesh { position: absolute; inset: 0; pointer-events: none; background-image: var(--gradient-mesh); }
.bg-mesh.soft { opacity: .4; }
.bg-noise {
  position: absolute; inset: 0; pointer-events: none;
  background-image: var(--noise-url); background-repeat: repeat;
  opacity: .4; mix-blend-mode: multiply;
}

/* ---------- NAV ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0;
  z-index: 50;
  padding: 1.25rem 0;
  transition: padding .5s ease;
}
.site-header.scrolled { padding: .5rem 0; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: .75rem 1rem;
  border-radius: 999px;
  transition: padding .5s ease, background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
@media (min-width: 640px){ .nav { padding: .75rem 1.5rem; } }
.site-header.scrolled .nav {
  background: rgba(255,255,255,.6);
  backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid rgba(255,255,255,.7);
  box-shadow: var(--shadow-frost);
  padding: .625rem 1.5rem;
}
.brand { font-family: var(--font-display); font-weight: 800; letter-spacing: -0.02em; font-size: 1.125rem; }
.brand span { color: var(--frost-700); }
.nav-links { display: none; list-style: none; margin: 0; padding: 0; gap: 2rem; align-items: center; font-size: .875rem; color: var(--muted); }
@media (min-width: 768px){ .nav-links { display: flex; } }
.nav-links a { position: relative; transition: color .3s; }
.nav-links a::after {
  content:""; position:absolute; left:0; bottom:-4px; height:1px; width:100%;
  background: var(--frost-700); transform: scaleX(0); transform-origin: right;
  transition: transform .3s ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .75rem;
  border-radius: 999px; padding: 1rem 1.75rem;
  font-size: .875rem; font-weight: 500;
  transition: transform .25s ease, background .25s ease, border-color .25s ease, color .25s ease;
  position: relative; overflow: hidden;
  border: 1px solid transparent;
}
.btn-sm { padding: .5rem 1rem; font-size: .875rem; }
.btn-ink { background: var(--ink); color: #fff; box-shadow: var(--shadow-frost); }
.btn-ink:hover { transform: scale(1.03); }
.btn-glass {
  background: rgba(255,255,255,.6); backdrop-filter: blur(10px);
  border: 1px solid var(--border); padding: 1rem 1.5rem; font-size: 1rem;
}
.btn-glass:hover { border-color: var(--frost-500); }
.btn-link {
  font-size: .875rem; font-weight: 500;
  text-decoration: underline; text-decoration-color: var(--frost-500);
  text-decoration-thickness: 2px; text-underline-offset: 8px;
  padding: 0 .25rem;
}
.btn-link:hover { text-decoration-color: var(--frost-700); }
.arrow { display: inline-block; transition: transform .3s ease; }
.btn:hover .arrow { transform: translateX(4px); }
.shine {
  position: absolute; inset: 0; transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent);
  transition: transform .7s ease;
}
.btn:hover .shine { transform: translateX(100%); }

/* ---------- HERO ---------- */
.hero { position: relative; min-height: 100vh; overflow: hidden; padding-top: 8rem; }
@media (min-width: 640px){ .hero { padding-top: 10rem; } }

.blob {
  position: absolute; pointer-events: none; border-radius: 50%;
  filter: blur(0);
  animation: blob 18s ease-in-out infinite;
}
.blob-1 { left: -10rem; top: 10rem; width: 520px; height: 520px;
  background: radial-gradient(closest-side, rgba(143,183,209,.7), transparent); }
.blob-2 { right: -8rem; top: 2.5rem; width: 420px; height: 420px;
  animation-delay: -6s;
  background: radial-gradient(closest-side, rgba(107,163,200,.55), transparent); }
@keyframes blob {
  0%,100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(40px,-30px) scale(1.08); }
  66% { transform: translate(-30px,20px) scale(.95); }
}

.hero-grid {
  position: relative;
  display: grid; grid-template-columns: 1fr; gap: 4rem;
  align-items: center; padding-bottom: 6rem;
}
@media (min-width: 1024px){
  .hero-grid { grid-template-columns: repeat(12,1fr); gap: 2.5rem; }
  .hero-copy { grid-column: span 7; }
  .hero-portrait { grid-column: span 5; }
}

.chip {
  display: inline-flex; align-items: center; gap: .5rem;
  border: 1px solid var(--frost-200);
  background: rgba(255,255,255,.7); backdrop-filter: blur(10px);
  padding: .25rem .75rem; border-radius: 999px;
  font-size: 11px; text-transform: uppercase; letter-spacing: .2em;
  color: var(--frost-700);
}
.chip .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--frost-700);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; } 50% { opacity: .3; }
}

.hero-title {
  margin: 2rem 0 0;
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.8rem, 4.2vw, 3.75rem);
  line-height: 1.08; letter-spacing: -0.01em;
  display: flex; flex-wrap: wrap; align-items: baseline;
  column-gap: .22em; row-gap: 0;
  max-width: 15ch;
}
.hero-title .w {
  display: inline-flex; opacity: 0;
  transform: translateY(40px); filter: blur(10px);
  animation: word-in .8s cubic-bezier(.22,1,.36,1) forwards;
  animation-delay: var(--d, 0s);
}
.hero-title .w.italic.gradient { padding: 0 .12em; font-weight: 300; }
@keyframes word-in {
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.lead {
  margin-top: 2rem;
  font-size: 1.125rem; color: var(--muted);
  max-width: 36rem;
}
@media (min-width: 640px){ .lead { font-size: 1.25rem; } }
.lead strong { color: var(--fg); font-weight: 500; }

.cta-row { margin-top: 2.5rem; display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.cta-row.center-row { justify-content: center; margin-top: 3rem; }

.reveal, .reveal-up { opacity: 0; transform: translateY(20px); animation: fade-up .7s cubic-bezier(.22,1,.36,1) forwards; animation-delay: var(--d, 0s); }
.reveal-up { transform: translateY(30px); opacity: 0; animation: none; transition: opacity .8s ease, transform .8s cubic-bezier(.22,1,.36,1); transition-delay: var(--d,0s); }
.reveal-up.in { opacity: 1; transform: translateY(0); }
@keyframes fade-up { to { opacity: 1; transform: translateY(0); } }

/* portrait */
.hero-portrait { position: relative; }
.portrait-frame {
  position: relative; margin: 0 auto;
  aspect-ratio: 4/5; width: 100%; max-width: 28rem;
  overflow: hidden; border-radius: 2rem;
  box-shadow: var(--shadow-frost);
  will-change: transform;
}
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; }
.portrait-frame .ring { position: absolute; inset: 0; border-radius: 2rem; box-shadow: inset 0 0 0 1px rgba(255,255,255,.5); }

.glass {
  background: rgba(255,255,255,.6);
  backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid rgba(255,255,255,.7);
}
.tag {
  position: absolute; padding: .75rem 1rem;
  border-radius: 1rem; box-shadow: var(--shadow-frost);
  font-size: .875rem;
}
.tag .k { font-size: 10px; text-transform: uppercase; letter-spacing: .15em; color: var(--muted); }
.tag .v { margin-top: 4px; display: flex; align-items: center; gap: .5rem; font-weight: 500; }
.tag .v.big { font-family: var(--font-display); font-size: 1.125rem; font-weight: 700; }
.tag-left  { left: -1rem; top: 2.5rem; }
.tag-right { right: -.5rem; bottom: 4rem; }
@media (min-width: 640px){
  .tag-left  { left: -2.5rem; }
  .tag-right { right: -2rem; }
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: #10b981; animation: pulse 2s infinite; }

.scroll-indicator {
  position: absolute; left: 0; right: 0; bottom: 1.5rem;
  display: flex; flex-direction: column; align-items: center; gap: .5rem;
  font-size: 10px; text-transform: uppercase; letter-spacing: .3em; color: var(--muted);
  pointer-events: none;
}
.scroll-line { display:block; width: 1px; height: 2rem; background: linear-gradient(to bottom, var(--frost-700), transparent); animation: scroll-bounce 2s ease-in-out infinite; }
@keyframes scroll-bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(8px); } }

/* ---------- MARQUEE ---------- */
.marquee {
  position: relative; overflow: hidden;
  border-top: 1px solid rgba(219,230,239,.6);
  border-bottom: 1px solid rgba(219,230,239,.6);
  background: rgba(232,240,248,.4);
  padding: 2rem 0;
}
.marquee-track { display: flex; width: max-content; animation: marquee 40s linear infinite; }
.marquee-group { display: flex; align-items: center; gap: 0; padding-right: 0; }
.marquee-group span {
  margin: 0 2rem;
  font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em;
  font-size: clamp(1.75rem, 3.5vw, 3rem);
  color: rgba(46,107,138,.7);
  white-space: nowrap;
}
.marquee-group i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--frost-300); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- STATS ---------- */
.stats { border-bottom: 1px solid rgba(219,230,239,.6); background: var(--bg); padding: 6rem 0; }
@media (min-width: 640px){ .stats { padding: 8rem 0; } }
.stats-grid {
  display: grid; grid-template-columns: repeat(2,1fr);
  gap: 1px; background: var(--border);
  border-radius: 1.5rem; overflow: hidden;
}
@media (min-width: 640px){ .stats-grid { grid-template-columns: repeat(4,1fr); } }
.stat { position: relative; background: var(--card); padding: 2.5rem; }
.stat-num {
  font-family: var(--font-display); font-weight: 800; letter-spacing: -0.05em;
  font-size: clamp(2.5rem, 5vw, 3.75rem); color: var(--frost-700);
}
.stat-label { margin-top: .75rem; font-size: .875rem; color: var(--muted); }

/* ---------- SERVICES ---------- */
.services { position: relative; overflow: hidden; padding: 6rem 0; }
@media (min-width: 640px){ .services { padding: 10rem 0; } }
.cards { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 768px){ .cards { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1024px){ .cards { grid-template-columns: repeat(3,1fr); } }
.card {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
  border: 1px solid var(--border); background: var(--card);
  border-radius: 1.5rem; padding: 2rem;
  transition: transform .5s ease, border-color .5s ease, box-shadow .5s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--frost-500); box-shadow: var(--shadow-frost); }
.card-halo {
  position: absolute; right: -2.5rem; top: -2.5rem;
  width: 10rem; height: 10rem; border-radius: 50%;
  background: var(--frost-100); filter: blur(28px);
  opacity: 0; transition: opacity .5s ease;
}
.card:hover .card-halo { opacity: 1; }
.card-top { display: flex; align-items: center; justify-content: space-between; }
.card-num { font-family: var(--font-display); font-size: 11px; font-weight: 700; letter-spacing: .18em; color: var(--frost-500); }
.card-arrow {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.25rem; height: 2.25rem; border-radius: 50%;
  border: 1px solid var(--border); color: var(--frost-700);
  transition: transform .5s ease, background .5s ease, color .5s ease, border-color .5s ease;
}
.card:hover .card-arrow { transform: rotate(45deg); background: var(--frost-700); color: #fff; border-color: var(--frost-700); }
.card h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; font-size: 1.5rem; margin: 2rem 0 0; }
.card p  { margin: 1rem 0 0; font-size: .875rem; color: var(--muted); flex: 1; line-height: 1.7; }
.tags { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.tags span {
  border: 1px solid var(--border); background: rgba(250,252,254,.5);
  border-radius: 999px; padding: .25rem .75rem; font-size: 11px; font-weight: 500; color: var(--muted);
}

/* ---------- APPROACH ---------- */
.approach { position: relative; background: var(--ink); color: #fff; padding: 6rem 0; overflow: hidden; }
@media (min-width: 640px){ .approach { padding: 10rem 0; } }
.approach-glow { position: absolute; inset: 0; opacity: .4; pointer-events: none;
  background: radial-gradient(600px 400px at 80% 0%, rgba(107,163,200,.4), transparent 60%); }
.approach-head { max-width: 48rem; margin-bottom: 5rem; }
.h-xl.light, .light-italic { color: #fff; }
.light-italic { font-style: italic; font-weight: 300; color: var(--frost-200); }
.muted-light { margin-top: 1.5rem; color: rgba(255,255,255,.6); font-size: 1.125rem; }

.timeline { position: relative; }
.tl-line, .tl-line-fill {
  position: absolute; left: 24px; top: 0; width: 1px; height: 100%;
}
@media (min-width: 640px){ .tl-line, .tl-line-fill { left: 50%; } }
.tl-line { background: rgba(255,255,255,.1); }
.tl-line-fill {
  background: linear-gradient(to bottom, var(--frost-200), var(--frost-500), var(--frost-700));
  height: 0%;
}
.tl-item {
  position: relative;
  display: grid; grid-template-columns: 1fr; gap: 1.5rem;
  align-items: start;
  padding-bottom: 4rem;
}
@media (min-width: 640px){
  .tl-item { grid-template-columns: 1fr 1fr; padding-bottom: 6rem; }
  .tl-item.alt .tl-body { grid-column: 2; }
}
.tl-body { padding-left: 4rem; }
@media (min-width: 640px){
  .tl-body.tl-right { padding-right: 4rem; padding-left: 0; text-align: right; }
  .tl-body.tl-left  { padding-left: 4rem; padding-right: 0; }
}
.tl-num { font-family: var(--font-display); font-weight: 800; letter-spacing: -0.05em;
  font-size: clamp(3rem,6vw,5rem); color: rgba(107,163,200,.4); }
.tl-body h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em;
  font-size: clamp(1.75rem,3vw,2.25rem); margin: .25rem 0 0; }
.tl-body p { margin: 1rem 0 0; max-width: 28rem; color: rgba(255,255,255,.6); }
@media (min-width: 640px){ .tl-body.tl-right p { margin-left: auto; } }
.tl-dot {
  position: absolute; left: 16px; top: 1.5rem;
  width: 20px; height: 20px; border-radius: 50%;
  border: 2px solid var(--frost-500); background: var(--ink);
}
@media (min-width: 640px){ .tl-dot { left: 50%; transform: translateX(-50%); } }

/* ---------- ABOUT ---------- */
.about { position: relative; overflow: hidden; background: rgba(232,240,248,.5); padding: 6rem 0; }
@media (min-width: 640px){ .about { padding: 10rem 0; } }
.about-grid { display: grid; grid-template-columns: 1fr; gap: 4rem; }
@media (min-width: 1024px){
  .about-grid { grid-template-columns: repeat(12,1fr); }
  .about-grid > div:first-child { grid-column: span 5; }
  .about-grid > div:last-child  { grid-column: span 7; }
}
.quote {
  margin-top: 2rem; font-family: var(--font-display); font-weight: 300;
  font-size: clamp(1.5rem, 2.5vw, 1.875rem); line-height: 1.35; letter-spacing: -0.02em;
}
.about-rows { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 640px){ .about-rows { grid-template-columns: 1fr 1fr; } }
.about-row {
  border: 1px solid var(--border); background: var(--card);
  border-radius: 1rem; padding: 1.5rem;
  transition: border-color .3s ease;
}
.about-row:hover { border-color: var(--frost-500); }
.about-row .k { font-size: 10px; text-transform: uppercase; letter-spacing: .18em; color: var(--muted); }
.about-row .v { margin-top: .5rem; font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em; }

/* ---------- CONTACT ---------- */
.contact { position: relative; overflow: hidden; padding: 6rem 0; }
@media (min-width: 640px){ .contact { padding: 10rem 0; } }
.container.center { text-align: center; max-width: 64rem; }
.center-p { margin: 2rem auto 0; }
.meta-row {
  margin-top: 4rem; display: flex; flex-wrap: wrap; justify-content: center;
  align-items: center; gap: .75rem 2rem; font-size: .875rem; color: var(--muted);
}
.meta-row i { display: inline-block; width: 4px; height: 4px; border-radius: 50%; background: var(--frost-300); }

.cal-wrap {
  overflow: hidden;
  max-height: 0; opacity: 0; transform: translateY(-12px);
  transition: max-height .7s cubic-bezier(.22,1,.36,1), opacity .5s ease, transform .6s cubic-bezier(.22,1,.36,1);
}
.cal-wrap.open { max-height: 760px; opacity: 1; transform: translateY(0); }
.cal-inner {
  margin: 2.5rem auto 0; max-width: 56rem;
  border: 1px solid var(--border); background: rgba(255,255,255,.8);
  border-radius: 1.5rem; padding: .5rem; box-shadow: var(--shadow-frost);
  backdrop-filter: blur(10px);
  transform: scale(.98); filter: blur(8px);
  transition: transform .6s cubic-bezier(.22,1,.36,1), filter .6s cubic-bezier(.22,1,.36,1);
  transition-delay: .05s;
}
@media (min-width: 640px){ .cal-inner { padding: .75rem; } }
.cal-wrap.open .cal-inner { transform: scale(1); filter: blur(0); }
.cal-wrap.open + * , .cal-wrap.open ~ * {}

#cal-arrow { transition: transform .4s cubic-bezier(.22,1,.36,1); }
#cal-toggle[aria-expanded="true"] #cal-arrow { transform: rotate(180deg); }

/* ---------- FOOTER ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg); padding: 2.5rem 0; }
.footer-inner {
  display: flex; flex-direction: column; align-items: center;
  gap: 1rem; font-size: .875rem; color: var(--muted);
}
@media (min-width: 640px){ .footer-inner { flex-direction: row; justify-content: space-between; } }
.footer .brand { color: var(--fg); font-weight: 700; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a:hover { color: var(--fg); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .hero-title .w { opacity: 1; transform: none; filter: none; }
  .reveal-up { opacity: 1; transform: none; }
}