/* ============================================
   IVAN OMELIANENKO — PORTFOLIO — STYLES v1.0
   Pattern borrowed from intellidesc/landing-static
   (CSS custom properties, no build step) but with
   its own neutral/teal brand — deliberately not the
   IntelliDesc violet, since IntelliDesc is just one
   of several featured projects here.
   ============================================ */

:root {
  --c-accent:        #0d9488;
  --c-accent-hover:  #0f766e;
  --c-accent-light:  #f0fdfa;
  --c-ink:           #18181b;
  --c-ink-2:         #27272a;
  --c-text:          #27272a;
  --c-muted:         #6b7280;
  --c-border:        #e7e5e4;
  --c-bg:            #fafaf9;
  --c-white:         #ffffff;

  --c-status-live:      #166534;
  --c-status-live-bg:   #dcfce7;
  --c-status-wip:       #92400e;
  --c-status-wip-bg:    #fef3c7;
  --c-status-prototype: #3f3f46;
  --c-status-prototype-bg: #e4e4e7;
  --c-status-client:    #1d4ed8;
  --c-status-client-bg: #dbeafe;
  --c-status-alpha:     #6d28d9;
  --c-status-alpha-bg:  #ede9fe;

  --c-danger:    #b91c1c;
  --c-danger-bg: #fef2f2;

  --radius:    10px;
  --radius-lg: 16px;
  --shadow:    0 4px 6px -1px rgb(0 0 0/.08), 0 2px 4px -2px rgb(0 0 0/.04);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0/.1), 0 8px 10px -6px rgb(0 0 0/.05);
  --t:         0.2s ease;
  --container: 1140px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}
.pf-main { flex: 1 0 auto; }
.pf-footer { flex-shrink: 0; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.section-header { text-align: center; margin-bottom: 52px; }
.section-tag {
  display: inline-block;
  font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--c-accent); background: var(--c-accent-light);
  padding: 4px 14px; border-radius: 100px; margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 800; letter-spacing: -.03em; line-height: 1.2;
  color: var(--c-ink); margin-bottom: 12px;
}
.section-header p { font-size: 1.02rem; color: var(--c-muted); max-width: 560px; margin: 0 auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: var(--radius);
  font-size: .9rem; font-weight: 600; cursor: pointer;
  transition: all var(--t); border: 2px solid transparent;
  white-space: nowrap; text-decoration: none !important; line-height: 1.4;
}
.btn-lg { padding: 14px 30px; font-size: .98rem; border-radius: 12px; }
.btn-primary { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.btn-primary:hover {
  background: var(--c-accent-hover); border-color: var(--c-accent-hover);
  transform: translateY(-1px); box-shadow: 0 6px 20px rgb(13 148 136/.3);
}
.btn-outline { background: transparent; color: var(--c-ink); border-color: var(--c-border); }
.btn-outline:hover { border-color: var(--c-accent); background: var(--c-accent-light); color: var(--c-accent); }
.btn-ghost-light { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.25); }
.btn-ghost-light:hover { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.5); }
.btn-sm { padding: 7px 16px; font-size: .82rem; border-radius: 8px; }

/* ======================== HEADER ======================== */
.pf-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,250,249,.96); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow var(--t);
}
.pf-header.scrolled { box-shadow: var(--shadow); }
.pf-nav { display: flex; align-items: center; height: 68px; gap: 32px; }
.pf-logo { font-size: 1.1rem; font-weight: 800; color: var(--c-ink); letter-spacing: -.02em; flex-shrink: 0; }
.pf-logo span { color: var(--c-accent); }
.pf-nav__links { display: flex; gap: 28px; margin-left: auto; }
.pf-nav__links a { font-size: .88rem; font-weight: 500; color: var(--c-muted); transition: color var(--t); }
.pf-nav__links a:hover { color: var(--c-ink); text-decoration: none; }
.pf-nav__cta { display: flex; gap: 10px; flex-shrink: 0; }

.pf-nav__burger {
  display: none; margin-left: auto; flex-shrink: 0;
  width: 40px; height: 40px; padding: 0;
  background: none; border: 0; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.pf-nav__burger span {
  display: block; width: 22px; height: 2px; background: var(--c-text);
  border-radius: 2px; transition: transform var(--t), opacity var(--t);
}
.pf-nav__burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.pf-nav__burger.active span:nth-child(2) { opacity: 0; }
.pf-nav__burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.pf-nav__mobile {
  display: none; flex-direction: column;
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--c-white); border-bottom: 1px solid var(--c-border);
  box-shadow: var(--shadow-lg); padding: 8px 24px 20px; max-height: calc(100vh - 68px);
  overflow-y: auto;
}
.pf-nav__mobile.open { display: flex; }
.pf-nav__mobile-link {
  display: block; padding: 14px 0; font-size: 1rem; font-weight: 500;
  color: var(--c-text); border-bottom: 1px solid var(--c-border);
}
.pf-nav__mobile-link:hover { color: var(--c-accent); text-decoration: none; }

/* ======================== HERO ======================== */
.pf-hero {
  background: linear-gradient(135deg, var(--c-ink) 0%, #134e4a 65%, #115e59 100%);
  padding: 96px 0 80px; text-align: center; position: relative; overflow: hidden;
}
.pf-hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(circle, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.hero-shader-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.pf-hero__inner { position: relative; max-width: 760px; margin: 0 auto; }
.pf-hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14);
  color: rgba(255,255,255,.88); font-size: .78rem; font-weight: 600; letter-spacing: .04em;
  padding: 6px 18px; border-radius: 100px; margin-bottom: 26px;
}
.pf-hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  font-weight: 900; letter-spacing: -.03em; line-height: 1.12; color: #fff; margin-bottom: 8px;
}
.pf-hero__role {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,.75); font-weight: 600; margin-bottom: 20px;
}
.pf-hero__subtitle {
  font-size: clamp(.95rem, 2vw, 1.08rem);
  color: rgba(255,255,255,.7); max-width: 600px; margin: 0 auto 32px; line-height: 1.7;
}
.pf-hero__cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 30px; }
.pf-hero__links { display: flex; gap: 18px; justify-content: center; align-items: center; }
.pf-hero__links a {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  color: #fff; transition: background var(--t), border-color var(--t);
}
.pf-hero__links a:hover { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.4); text-decoration: none; }
.pf-hero__links svg { width: 18px; height: 18px; }

/* ======================== PROJECTS ======================== */
.pf-projects, .pf-all-projects { padding: 88px 0; }
.pf-all-projects { background: var(--c-white); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }

.pf-project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pf-project-grid--compact { grid-template-columns: repeat(2, 1fr); }

.pf-card {
  background: var(--c-white); border: 1px solid var(--c-border);
  border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column;
  transition: box-shadow var(--t), transform var(--t);
}
.pf-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }

.pf-card__visual {
  height: 150px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--c-accent-light) 0%, #ccfbf1 100%);
  display: flex; align-items: center; justify-content: center;
}
.pf-card__visual img { width: 100%; height: 100%; object-fit: cover; }
.pf-card__initial {
  font-size: 2.2rem; font-weight: 900; color: var(--c-accent); opacity: .55;
  letter-spacing: -.03em;
}

.pf-card__body { padding: 22px 24px 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.pf-card__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.pf-card__name { font-size: 1.08rem; font-weight: 800; color: var(--c-ink); letter-spacing: -.01em; }
.pf-card__tagline { font-size: .86rem; color: var(--c-muted); margin-top: 2px; }
.pf-card__desc { font-size: .88rem; color: var(--c-text); line-height: 1.6; flex: 1; }

.status-badge {
  font-size: .68rem; font-weight: 700; padding: 3px 10px; border-radius: 100px;
  letter-spacing: .03em; text-transform: uppercase; flex-shrink: 0; white-space: nowrap;
}
.status-live      { background: var(--c-status-live-bg);      color: var(--c-status-live); }
.status-wip        { background: var(--c-status-wip-bg);       color: var(--c-status-wip); }
.status-prototype  { background: var(--c-status-prototype-bg); color: var(--c-status-prototype); }
.status-client     { background: var(--c-status-client-bg);    color: var(--c-status-client); }
.status-alpha      { background: var(--c-status-alpha-bg);     color: var(--c-status-alpha); }

.pf-card__tech { display: flex; flex-wrap: wrap; gap: 6px; }
.pf-tech-pill {
  font-size: .74rem; font-weight: 600; color: var(--c-muted);
  background: var(--c-bg); border: 1px solid var(--c-border);
  padding: 3px 10px; border-radius: 100px;
}
.pf-card__links { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px; margin-top: 4px; }
.pf-private-badge {
  font-size: .78rem; font-weight: 600; color: var(--c-muted);
  border: 1px dashed var(--c-border); padding: 6px 12px; border-radius: 8px;
  display: inline-flex; align-items: center; gap: 6px;
}

/* ======================== EXPERIENCE ======================== */
.pf-experience { padding: 88px 0; }
.pf-timeline { max-width: 760px; margin: 0 auto; position: relative; padding-left: 28px; }
.pf-timeline::before { content: ''; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px; background: var(--c-border); }
.pf-timeline-item { position: relative; padding-bottom: 34px; }
.pf-timeline-item:last-child { padding-bottom: 0; }
.pf-timeline-item::before {
  content: ''; position: absolute; left: -28px; top: 4px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--c-white); border: 3px solid var(--c-accent);
}
.pf-timeline-item__head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }
.pf-timeline-item__role { font-size: 1rem; font-weight: 700; color: var(--c-ink); }
.pf-timeline-item__company { font-size: .88rem; color: var(--c-accent); font-weight: 600; }
.pf-timeline-item__period { font-size: .8rem; color: var(--c-muted); white-space: nowrap; }
.pf-timeline-item ul { display: flex; flex-direction: column; gap: 5px; }
.pf-timeline-item li { font-size: .87rem; color: var(--c-muted); line-height: 1.6; padding-left: 16px; position: relative; }
.pf-timeline-item li::before { content: '—'; position: absolute; left: 0; color: var(--c-border); }

/* ======================== SKILLS ======================== */
.pf-skills { padding: 88px 0; background: var(--c-white); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.pf-skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; max-width: 900px; margin: 0 auto; }
.pf-skill-group h3 { font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--c-accent); margin-bottom: 12px; }
.pf-skill-group__items { display: flex; flex-wrap: wrap; gap: 8px; }
.pf-skill-pill {
  font-size: .82rem; font-weight: 500; color: var(--c-text);
  background: var(--c-bg); border: 1px solid var(--c-border);
  padding: 6px 13px; border-radius: 100px;
}

/* ======================== CONTACT / FOOTER ======================== */
.pf-contact { padding: 88px 0; text-align: center; }
.pf-contact h2 { font-size: clamp(1.7rem, 3.2vw, 2.6rem); font-weight: 900; color: var(--c-ink); letter-spacing: -.03em; margin-bottom: 14px; }
.pf-contact p { font-size: 1.02rem; color: var(--c-muted); max-width: 480px; margin: 0 auto 30px; }
.pf-contact__links { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.pf-contact__divider {
  display: flex; align-items: center; gap: 14px;
  max-width: 480px; margin: 40px auto; color: var(--c-muted); font-size: .82rem;
}
.pf-contact__divider::before, .pf-contact__divider::after {
  content: ''; flex: 1; height: 1px; background: var(--c-border);
}

.pf-contact-form {
  max-width: 480px; margin: 0 auto; text-align: left;
  display: flex; flex-direction: column; gap: 18px;
}
.pf-form-row { display: flex; flex-direction: column; gap: 6px; }
.pf-form-row label { font-size: .82rem; font-weight: 600; color: var(--c-ink); }
.pf-form-row input, .pf-form-row textarea {
  font: inherit; font-size: .92rem; color: var(--c-text);
  background: var(--c-white); border: 1.5px solid var(--c-border);
  border-radius: var(--radius); padding: 11px 14px;
  transition: border-color var(--t), box-shadow var(--t);
}
.pf-form-row input:focus, .pf-form-row textarea:focus {
  outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px var(--c-accent-light);
}
.pf-form-row textarea { resize: vertical; min-height: 120px; }
.pf-form-row.invalid input, .pf-form-row.invalid textarea { border-color: var(--c-danger); }
.pf-form-row__error { font-size: .78rem; color: var(--c-danger); display: none; }
.pf-form-row.invalid .pf-form-row__error { display: block; }

/* Honeypot: off-canvas, not display:none — some bots specifically skip
   display:none/visibility:hidden fields but still fill anything else. */
.pf-form-row--hp {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}

.cf-turnstile { margin: 2px 0; align-self: center; }
.pf-contact-form > .btn { align-self: center; }

.pf-form-status {
  font-size: .85rem; padding: 10px 14px; border-radius: var(--radius); display: none;
}
.pf-form-status.visible { display: block; }
.pf-form-status--success { background: var(--c-status-live-bg); color: var(--c-status-live); }
.pf-form-status--error { background: var(--c-danger-bg); color: var(--c-danger); }

.btn.is-loading, .btn[disabled] { opacity: .6; pointer-events: none; }

.pf-footer { background: var(--c-ink); padding: 36px 0; }
.pf-footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.pf-footer__name { font-size: .95rem; font-weight: 700; color: #fff; }
.pf-footer__copy { font-size: .78rem; color: #71717a; }

/* ======================== RESPONSIVE ======================== */
@media (max-width: 920px) {
  .pf-project-grid { grid-template-columns: 1fr 1fr; }
  .pf-project-grid--compact { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .pf-skills-grid { grid-template-columns: 1fr; }
  .pf-nav__links { display: none; }
  .pf-nav__burger { display: flex; }
}
@media (max-width: 640px) {
  .pf-hero { padding: 64px 0 52px; }
  .pf-projects, .pf-all-projects, .pf-experience, .pf-skills, .pf-contact { padding: 60px 0; }
  .section-header { margin-bottom: 36px; }
  .pf-project-grid { grid-template-columns: 1fr; }
  .pf-footer__inner { flex-direction: column; text-align: center; }
  .pf-timeline-item__head { flex-direction: column; gap: 2px; }
}