/* ─────────────────────────────────────────────────────────────────
   Studio Valentinov — shared design system
   One typeface. One weight range. Zero decoration.
   Every pixel earns its place.
───────────────────────────────────────────────────────────────── */

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

:root {
  --black: #000;
  --rule:  rgba(255,255,255,0.07);
  --text:  rgba(255,255,255,0.88);
  --muted: rgba(255,255,255,0.58);
  --faint: rgba(255,255,255,0.12);
  --blue:  #0a84ff;
  --green: #30d158;
  --red:   #ff453a;
  --ease:  cubic-bezier(0.25, 0, 0, 1);
  --wrap:  1040px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--black);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ── Type ── */
.t-hero    { font-size: clamp(3rem,8vw,7rem); font-weight:300; letter-spacing: 0; line-height:1.02; }
.t-hero strong { font-weight:500; color:var(--text); }
.t-page    { font-size: clamp(2.5rem,6vw,5rem); font-weight:300; letter-spacing: 0; line-height:1.04; }
.t-section { font-size: clamp(1.75rem,4vw,3rem); font-weight:300; letter-spacing: 0; line-height:1.08; }
.t-label   { font-size:11px; font-weight:500; letter-spacing:0.12em; text-transform:uppercase; color:var(--muted); }
.t-body    { font-size:17px; font-weight:300; line-height:1.75; color:var(--muted); }
.t-small   { font-size:14px; font-weight:300; line-height:1.65; color:var(--muted); }
.t-mono    { font-family:inherit; font-size:13px; }

/* ── Layout ── */
.wrap    { max-width:var(--wrap); margin:0 auto; padding:0 40px; }
.rule    { height:0.5px; background:var(--rule); }
.section { padding:100px 0; }
.pt-nav  { padding-top:86px; }   /* push content below floating nav */

/* ── Nav ── */
nav {
  position:fixed; top:0; left:0; right:0; z-index:200;
  height:52px;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 40px;
  background:rgba(0,0,0,0.80);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:0.5px solid var(--rule);
}
.logo { font-size:13px; font-weight:500; letter-spacing: 0; color:var(--text); text-decoration:none; }
.nav-links { display:flex; gap:32px; list-style:none; }
.nav-links a { font-size:13px; font-weight:300; color:var(--muted); text-decoration:none; transition:color .2s; }
.nav-links a:hover, .nav-links a.active { color:var(--text); }
.nav-cta { font-size:13px; font-weight:400; color:var(--blue); text-decoration:none; }
.menu-btn { display:none; background:none; border:none; cursor:pointer; padding:4px; color:var(--text); }

/* Mobile nav */
.mobile-menu {
  display:none; position:fixed;
  top:52px; left:0; right:0;
  background:rgba(0,0,0,0.96);
  backdrop-filter:blur(20px);
  border-bottom:0.5px solid var(--rule);
  padding:20px 40px; z-index:199;
}
.mobile-menu.open { display:block; }
.mobile-menu a { display:block; font-size:17px; font-weight:300; color:var(--text); text-decoration:none; padding:12px 0; border-bottom:0.5px solid var(--rule); }
.mobile-menu a:last-child { border-bottom:none; }

/* ── Buttons ── */
.btn-primary {
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 24px; border-radius:980px;
  background:var(--blue); color:#fff;
  font-size:14px; font-weight:400; font-family:inherit;
  text-decoration:none; border:none; cursor:pointer;
  transition:opacity .2s, transform .2s;
}
.btn-primary:hover { opacity:.88; transform:translateY(-1px); }

.btn-ghost {
  font-size:14px; font-weight:300; color:var(--blue);
  text-decoration:none; background:none; border:none;
  cursor:pointer; font-family:inherit;
  transition:opacity .2s;
}
.btn-ghost:hover { opacity:.7; }

/* ── Grid patterns ── */
.grid-line { display:grid; gap:1px; background:var(--rule); }
.grid-2    { grid-template-columns:1fr 1fr; }
.grid-3    { grid-template-columns:1fr 1fr 1fr; }
.grid-4    { grid-template-columns:repeat(4,1fr); }
.grid-cell { background:var(--black); }

/* ── Footer ── */
footer {
  border-top:0.5px solid var(--rule);
  padding:28px 40px;
  display:flex; align-items:center; justify-content:space-between;
  flex-wrap:wrap; gap:16px;
}
.foot-links { display:flex; gap:24px; list-style:none; flex-wrap:wrap; }
.foot-links a { font-size:12px; font-weight:300; color:var(--muted); text-decoration:none; transition:color .2s; }
.foot-links a:hover { color:var(--text); }
.foot-copy { font-size:12px; font-weight:300; color:var(--muted); }

/* ── Form shared ── */
.form-field { margin-bottom:18px; }
.form-field label { display:block; font-size:11px; font-weight:500; letter-spacing:.10em; text-transform:uppercase; color:var(--muted); margin-bottom:7px; }
.form-field input, .form-field textarea, .form-field select {
  width:100%; background:rgba(255,255,255,0.04);
  border:0.5px solid var(--rule); border-radius:4px;
  color:var(--text); font-family:inherit;
  font-size:15px; font-weight:300;
  padding:12px 14px; outline:none;
  transition:border-color .2s, background .2s;
  -webkit-appearance:none;
}
.form-field input::placeholder, .form-field textarea::placeholder { color:var(--faint); }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  border-color:rgba(10,132,255,0.5);
  background:rgba(255,255,255,0.06);
}
.form-field select option { background:#111; }
.form-field textarea { min-height:110px; resize:vertical; }
.form-2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }

/* ── Reveal ── */
.fade-up { opacity:0; transform:translateY(16px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.fade-up.visible { opacity:1; transform:none; }
.d1{transition-delay:.07s} .d2{transition-delay:.14s} .d3{transition-delay:.21s} .d4{transition-delay:.28s}

/* ── Animations ── */
@keyframes fadeup { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:none} }
@keyframes bob    { 0%,100%{transform:translateY(0)} 50%{transform:translateY(6px)} }

/* ── Responsive ── */
@media(max-width:860px) {
  nav { padding:0 20px; }
  .nav-links, .nav-cta { display:none; }
  .menu-btn { display:block; }
  .wrap { padding:0 20px; }
  .section { padding:64px 0; }
  .t-hero { font-size:3.05rem; letter-spacing: 0; line-height:1.05; }
  .t-page { font-size:2.65rem; letter-spacing: 0; line-height:1.08; }
  .t-section { font-size:2rem; letter-spacing: 0; line-height:1.12; }
  .t-body { font-size:16px; line-height:1.68; }
  .btn-primary { min-height:44px; padding:12px 18px; justify-content:center; }
  .page-cta {
    flex-direction:column !important;
    align-items:flex-start !important;
    padding:56px 0 !important;
    gap:20px !important;
  }
  .wrap.page-cta { padding:56px 20px !important; }
  .page-cta .btn-primary { width:100%; max-width:280px; }
  footer { padding:24px 20px; flex-direction:column; align-items:flex-start; }
  .grid-2 { grid-template-columns:1fr; }
  .grid-3 { grid-template-columns:1fr 1fr; }
  .grid-4 { grid-template-columns:1fr 1fr; }
  .form-2 { grid-template-columns:1fr; }
}
@media(max-width:480px) {
  .wrap { padding:0 18px; }
  .section { padding:56px 0; }
  .t-hero { font-size:2.75rem; }
  .t-page { font-size:2.25rem; }
  .t-section { font-size:1.75rem; }
  .foot-links { flex-direction:column; gap:10px; }
  .wrap.page-cta { padding:48px 18px !important; }
  .grid-3, .grid-4 { grid-template-columns:1fr; }
}

/* ── Premium home redesign ───────────────────────────────────── */
.sv-home-premium {
  background:
    radial-gradient(circle at 12% 8%, rgba(10,132,255,0.13), transparent 36%),
    radial-gradient(circle at 88% 78%, rgba(10,132,255,0.08), transparent 42%),
    var(--black);
}

.premium-hero {
  width: var(--sv-page-width);
  margin: 0 auto;
  padding: 30px var(--sv-page-pad) 78px;
}

.eyebrow {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 500;
}

.premium-hero-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
  gap: clamp(28px, 4vw, 54px);
  align-items: end;
}

.premium-title {
  font-size: clamp(2.25rem, 5.3vw, 4.8rem);
  line-height: 1.04;
  font-weight: 320;
  letter-spacing: -.012em;
  max-width: 12ch;
}

.premium-title strong { font-weight: 560; }

.premium-lead {
  margin-top: 22px;
  font-size: 17px;
  line-height: 1.72;
  color: var(--muted);
  max-width: 55ch;
}

.hero-ctas {
  margin-top: 30px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-visual {
  border: .5px solid var(--rule);
  border-radius: 26px;
  min-height: 360px;
  padding: 20px;
  background:
    linear-gradient(125deg, rgba(6,18,33,0.86), rgba(0,0,0,0.94)),
    radial-gradient(circle at 14% 10%, rgba(92,170,255,0.22), transparent 42%);
  position: relative;
  overflow: hidden;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .34;
}

.hero-panel {
  position: relative;
  z-index: 1;
  border: .5px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  padding: 14px;
  background: rgba(0,0,0,0.32);
  margin-bottom: 12px;
}

.hero-panel b {
  display: block;
  font-size: 10px;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.hero-panel p {
  font-size: 13px;
  color: var(--text);
}

.kpi-row {
  width: var(--sv-page-width);
  margin: 0 auto;
  padding: 0 var(--sv-page-pad) 8px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: .5px solid var(--rule);
}

.kpi {
  background: var(--black);
  padding: 28px 24px;
}

.kpi strong {
  display: block;
  font-size: clamp(1.5rem, 2.7vw, 2.5rem);
  line-height: 1;
  font-weight: 460;
}

.kpi span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.section-shell {
  width: var(--sv-page-width);
  margin: 0 auto;
  padding: 88px var(--sv-page-pad);
}

.section-intro {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 32px;
  margin-bottom: 34px;
}

.section-intro h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.9rem);
  line-height: 1.14;
  font-weight: 340;
  max-width: 18ch;
}

.section-intro p {
  max-width: 64ch;
  color: var(--muted);
}

.why-grid-premium {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: .5px solid var(--rule);
}

.why-card {
  background: var(--black);
  padding: 30px 26px 34px;
}

.why-card b {
  display: block;
  color: var(--blue);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.why-card h3 {
  font-size: 1.06rem;
  font-weight: 460;
  margin-bottom: 10px;
}

.why-card p { color: var(--muted); font-size: 14px; }

.services-line {
  border-top: .5px solid var(--rule);
}

.service-row-premium {
  display: grid;
  grid-template-columns: 160px 1fr 170px;
  gap: 28px;
  padding: 28px 0;
  border-bottom: .5px solid var(--rule);
  align-items: center;
}

.service-row-premium .code {
  color: var(--blue);
  font-size: 11px;
  letter-spacing: .12em;
}

.service-row-premium h3 { font-size: 1.08rem; font-weight: 460; }
.service-row-premium p { color: var(--muted); margin-top: 6px; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  border: .5px solid var(--rule);
  border-radius: 18px;
  overflow: hidden;
  background: var(--black);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.project-card:hover {
  transform: translateY(-3px);
  border-color: rgba(10,132,255,0.42);
}

.project-visual {
  aspect-ratio: 16/10;
  background:
    linear-gradient(140deg, rgba(5,14,26,0.96), rgba(1,1,1,0.98)),
    radial-gradient(circle at 72% 20%, rgba(10,132,255,0.2), transparent 42%);
  border-bottom: .5px solid var(--rule);
  position: relative;
}

.project-visual::after {
  content: "";
  position: absolute;
  inset: 16px;
  border: .5px solid rgba(255,255,255,0.16);
  border-radius: 10px;
}

.project-copy { padding: 18px 18px 20px; }
.project-copy h3 { font-size: 1rem; font-weight: 460; margin-bottom: 8px; }
.project-meta { color: var(--muted); font-size: 13px; line-height: 1.55; }

.stack-list {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stack-pill {
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  border: .5px solid var(--rule);
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 10px;
}

.process-grid-premium {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: .5px solid var(--rule);
}

.process-step-premium {
  background: var(--black);
  padding: 24px 22px 26px;
}

.process-step-premium b {
  display: block;
  color: var(--blue);
  font-size: 11px;
  letter-spacing: .11em;
  margin-bottom: 16px;
}

.process-step-premium h3 { font-size: 15px; margin-bottom: 8px; }
.process-step-premium p { color: var(--muted); font-size: 14px; }

.cta-band {
  border: .5px solid var(--rule);
  border-radius: 22px;
  padding: 36px 32px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  background: linear-gradient(140deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
}

.contact-grid-premium {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 28px;
  margin-top: 26px;
}

@media (max-width: 980px) {
  .premium-hero-grid,
  .section-intro,
  .contact-grid-premium,
  .cta-band { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: 1fr 1fr; }
  .why-grid-premium { grid-template-columns: 1fr 1fr; }
  .project-grid { grid-template-columns: 1fr 1fr; }
  .process-grid-premium { grid-template-columns: 1fr 1fr; }
  .service-row-premium { grid-template-columns: 120px 1fr; }
  .service-row-premium .btn-ghost { grid-column: 2; justify-self: start; }
}

@media (max-width: 640px) {
  .premium-hero { padding-top: 12px; padding-bottom: 56px; }
  .hero-visual { min-height: 300px; }
  .kpi-row,
  .why-grid-premium,
  .project-grid,
  .process-grid-premium { grid-template-columns: 1fr; }
  .section-shell { padding-top: 64px; padding-bottom: 64px; }
  .service-row-premium { grid-template-columns: 1fr; gap: 12px; }
}