/* ============================================================
   Backroom Studio — design system
   ============================================================ */

:root {
  --bg:        #F7F8FA;
  --bg-soft:   #FFFFFF;
  --surface:   #FFFFFF;
  --surface-2: #F2F3F7;
  --border:    #E4E6EC;
  --text:      #14151B;
  --text-dim:  #565A66;
  --text-mute: #8A8E9B;
  --lime:      #4F46E5;   /* indigo accent */
  --sky:       #0EA5B7;   /* teal accent */
  --accent-grad: linear-gradient(120deg, #6D5EF7 0%, #0EA5B7 100%);
  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1140px;
  --ease:      cubic-bezier(.4, 0, .2, 1);
  --font:      "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:      "Space Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* subtle grain / glow backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(55% 45% at 82% -8%, rgba(14, 165, 183, .12), transparent 70%),
    radial-gradient(50% 45% at 8% -5%, rgba(109, 94, 247, .12), transparent 70%);
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Typography ---------- */
h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; font-weight: 700; }
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 18px;
}
.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 22px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent-grad); color: #FFFFFF; }
.btn-primary:hover { box-shadow: 0 12px 30px -10px rgba(109, 94, 247, .5); }
.btn-ghost { border-color: var(--border); color: var(--text); background: #FFFFFF; }
.btn-ghost:hover { border-color: var(--text-mute); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(247, 248, 250, .72);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.scrolled { border-color: var(--border); background: rgba(255, 255, 255, .9); box-shadow: 0 4px 24px -16px rgba(20,21,27,.25); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: -0.01em; }
.brand img { width: 34px; height: 34px; }
.brand span small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--text-mute); text-transform: uppercase; font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { color: var(--text-dim); font-size: 15px; font-weight: 500; transition: color .2s var(--ease); }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta { display: flex; align-items: center; gap: 16px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; transition: .3s var(--ease); }

/* ---------- Hero ---------- */
.hero { padding: 110px 0 90px; position: relative; }
.hero h1 { font-size: clamp(42px, 7vw, 82px); max-width: 14ch; margin-bottom: 26px; }
.hero p.lead { font-size: clamp(17px, 2.2vw, 21px); color: var(--text-dim); max-width: 54ch; margin-bottom: 38px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 40px; margin-top: 64px; flex-wrap: wrap; }
.hero-meta .stat strong { display: block; font-size: 30px; font-weight: 700; }
.hero-meta .stat span { font-size: 13px; color: var(--text-mute); font-family: var(--mono); letter-spacing: .05em; }

/* ---------- Section shells ---------- */
.section { padding: 90px 0; }
.section-head { max-width: 60ch; margin-bottom: 54px; }
.section-head h2 { font-size: clamp(30px, 4.5vw, 46px); margin-bottom: 16px; }
.section-head p { color: var(--text-dim); font-size: 17px; }

/* ---------- Services grid ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: #D6D9E2; box-shadow: 0 18px 40px -24px rgba(20,21,27,.3); }
.card .ic {
  width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 20px;
  background: rgba(109, 94, 247, .1); color: var(--lime);
  font-size: 22px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 15px; }

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.project::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(120% 100% at 100% 0%, rgba(14,165,183,.08), transparent 55%);
  opacity: 0; transition: opacity .35s var(--ease);
}
.project:hover { transform: translateY(-4px); border-color: #D6D9E2; box-shadow: 0 18px 40px -24px rgba(20,21,27,.3); }
.project:hover::after { opacity: 1; }
.project-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.project-logo {
  width: 56px; height: 56px; border-radius: 14px;
  display: grid; place-items: center; flex: none;
  overflow: hidden; background: #fff;
  border: 1px solid var(--border);
}
.project-logo img { width: 100%; height: 100%; object-fit: cover; }
.project-logo.contain { background: #fff; }
.project-logo.contain img { object-fit: contain; padding: 10px; }
.project h3 { font-size: 22px; margin-bottom: 8px; }
.project .role { font-family: var(--mono); font-size: 12px; color: var(--text-mute); }
.project p { color: var(--text-dim); font-size: 15px; margin: 14px 0 18px; }
.project-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px; }
.project-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--lime);
  position: relative; z-index: 1;
}
.project-link:hover { color: var(--sky); }
.project-link .arrow { transition: transform .25s var(--ease); }
.project-link:hover .arrow { transform: translateX(3px); }
.project-private { font-family: var(--mono); font-size: 12px; color: var(--text-mute); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12px; font-family: var(--mono);
  padding: 5px 11px; border-radius: 100px;
  border: 1px solid var(--border); color: var(--text-dim);
}

/* ---------- Process / steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { padding: 28px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.step .num { font-family: var(--mono); font-size: 13px; color: var(--lime); margin-bottom: 14px; }
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 14px; }

/* ---------- CTA band ---------- */
.cta-band {
  margin: 40px auto 90px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(109,94,247,.13), transparent 55%),
    radial-gradient(120% 140% at 100% 100%, rgba(14,165,183,.13), transparent 55%),
    var(--surface);
  padding: 64px 48px;
  text-align: center;
}
.cta-band h2 { font-size: clamp(28px, 4vw, 44px); margin-bottom: 16px; }
.cta-band p { color: var(--text-dim); max-width: 50ch; margin: 0 auto 30px; font-size: 17px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: start; }
.about-grid p { color: var(--text-dim); font-size: 17px; margin-bottom: 18px; }
.about-grid p strong { color: var(--text); }
.portrait {
  border-radius: var(--radius); border: 1px solid var(--border);
  background:
    radial-gradient(80% 80% at 30% 20%, rgba(109,94,247,.18), transparent 60%),
    radial-gradient(80% 80% at 80% 90%, rgba(14,165,183,.18), transparent 60%),
    var(--surface-2);
  aspect-ratio: 4/5; display: grid; place-items: center; position: relative; overflow: hidden;
}
.portrait .mono-mark { font-family: var(--mono); font-size: 13px; color: var(--text-mute); position: absolute; bottom: 20px; left: 22px; }
.portrait .big-init { font-size: 120px; font-weight: 800; letter-spacing: -0.04em; }
.skill-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.timeline { margin-top: 16px; border-left: 1px solid var(--border); padding-left: 26px; }
.timeline .item { position: relative; padding-bottom: 30px; }
.timeline .item::before { content:""; position:absolute; left:-31px; top:6px; width:10px; height:10px; border-radius:50%; background: var(--lime); }
.timeline .item:last-child { padding-bottom: 0; }
.timeline .yr { font-family: var(--mono); font-size: 12px; color: var(--text-mute); }
.timeline .item h3 { font-size: 18px; margin: 4px 0 6px; }
.timeline .item p { color: var(--text-dim); font-size: 15px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: start; }
.contact-info .row { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--border); }
.contact-info .row:first-child { padding-top: 0; }
.contact-info .ic { width: 42px; height: 42px; flex: none; border-radius: 11px; background: rgba(14,165,183,.1); color: var(--sky); display: grid; place-items: center; font-size: 18px; }
.contact-info .row h3 { font-size: 15px; margin-bottom: 2px; }
.contact-info .row a, .contact-info .row p { color: var(--text-dim); font-size: 15px; }
.contact-info .row a:hover { color: var(--text); }

form .field { margin-bottom: 18px; }
form label { display: block; font-size: 14px; margin-bottom: 8px; color: var(--text-dim); }
form input, form textarea, form select {
  width: 100%; padding: 14px 16px; font: inherit; font-size: 15px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
form input:focus, form textarea:focus, form select:focus { outline: none; border-color: var(--lime); background: var(--surface-2); }
form textarea { resize: vertical; min-height: 140px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 13px; color: var(--text-mute); margin-top: 14px; }
.form-success { display: none; padding: 16px 18px; border-radius: var(--radius-sm); background: rgba(14,165,183,.1); border: 1px solid rgba(14,165,183,.35); color: #0B7E8C; font-size: 15px; margin-bottom: 18px; }
.form-success.show { display: block; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 56px 0 40px; margin-top: 40px; }
.footer-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 40px; }
.footer-grid .brand { margin-bottom: 16px; }
.footer-col h4 { font-size: 13px; font-family: var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--text-mute); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-dim); font-size: 15px; margin-bottom: 10px; transition: color .2s var(--ease); }
.footer-col a:hover { color: var(--text); }
.footer-about { max-width: 30ch; }
.footer-about p { color: var(--text-dim); font-size: 14px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 26px; border-top: 1px solid var(--border); flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 13px; color: var(--text-mute); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-3, .steps { grid-template-columns: 1fr 1fr; }
  .projects { grid-template-columns: 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .nav-links, .nav-cta .btn { display: none; }
  .nav-toggle { display: block; }
  .site-header.open .nav-links {
    display: flex; flex-direction: column; gap: 8px;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--bg-soft); border-bottom: 1px solid var(--border);
    padding: 20px 24px;
  }
  .site-header.open .nav-links a { padding: 10px 0; font-size: 17px; }
}
@media (max-width: 600px) {
  .grid-3, .steps, .grid-2, .form-row { grid-template-columns: 1fr; }
  .hero { padding: 70px 0 60px; }
  .section { padding: 64px 0; }
  .cta-band { padding: 44px 26px; }
  .hero-meta { gap: 28px; }
}