/* ============================================================
   THE HUMAN EDGE — Design System
   Mircea Oltean Personal Site
   ============================================================ */

/* ---- TOKENS ---- */
:root {
  --black:        #0A0A0A;
  --soft-black:   #121212;
  --charcoal:     #1C1C1C;
  --charcoal-mid: #252525;
  --gold:         #D4AF37;
  --gold-light:   #F2C66D;
  --gold-dim:     rgba(154,125,36,0.55);
  --gold-glow:    rgba(212,175,55,0.06);
  --warm-white:   #E8E6E3;
  --ww-70:        rgba(232,230,227,0.7);
  --ww-45:        rgba(232,230,227,0.45);
  --ww-20:        rgba(232,230,227,0.2);
  --ww-10:        rgba(232,230,227,0.1);

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', sans-serif;
  --font-italic:  'Cormorant Garamond', Georgia, serif;

  --max-w:  1240px;
  --gutter: 2rem;
  --gb:     1px solid var(--gold-dim); /* gold border */
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--black);
  color: var(--warm-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* Leather texture noise */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='250' height='250'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='250' height='250' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---- LAYOUT ---- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }
.section { position: relative; z-index: 1; padding: 6rem 0; }
.section--dark { background: var(--charcoal); }
.section--mid  { background: var(--soft-black); }

.divider {
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--gold-dim) 20%, var(--gold-dim) 80%, transparent 100%);
  position: relative; z-index: 1;
}

/* ---- TYPOGRAPHY ---- */
.overline {
  font-size: 0.67rem; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold); font-family: var(--font-body);
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  font-weight: 600; line-height: 1.2;
  color: var(--warm-white); margin-top: 0.5rem;
}
.section-header { margin-bottom: 3rem; }
.gold  { color: var(--gold); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-block;
  font-family: var(--font-body); font-size: 0.7rem;
  font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase;
  padding: 0.7rem 1.6rem; cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.btn-gold {
  color: var(--black); background: var(--gold);
  border: 1px solid var(--gold);
}
.btn-gold:hover { background: var(--gold-light); border-color: var(--gold-light); }
.btn-outline {
  color: var(--warm-white); background: transparent;
  border: 1px solid var(--ww-20);
}
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--gold); border-bottom: 1px solid transparent;
  transition: gap 0.2s, border-color 0.2s;
}
.link-arrow::after { content: '→'; }
.link-arrow:hover  { gap: 0.7rem; border-color: var(--gold); }

/* ---- HEADER ---- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,10,10,0.94);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: var(--gb); padding: 1.1rem 0;
}
.header-inner {
  display: flex; align-items: center;
  justify-content: space-between; gap: 1rem;
}
.logo {
  font-family: var(--font-display); font-size: 1rem;
  font-weight: 400; letter-spacing: 0.12em;
  text-transform: uppercase; white-space: nowrap; line-height: 1;
}
.logo .human { font-weight: 700; color: var(--gold); }
.site-nav { display: flex; align-items: center; gap: 2rem; }
.site-nav .nav-link {
  font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ww-45); transition: color 0.2s;
}
.site-nav .nav-link:hover,
.site-nav .nav-link.active { color: var(--warm-white); }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span { display: block; width: 22px; height: 1px; background: var(--warm-white); }

/* ---- QUOTE FRAME motif ---- */
.quote-frame {
  border: var(--gb); padding: 2.8rem 2.2rem 2.4rem 2.6rem;
  position: relative;
}
.qm {
  position: absolute;
  font-family: var(--font-display); font-size: 5rem;
  line-height: 1; color: var(--gold);
}
.qm-open  { top: -0.25em; left: 0.6rem; }
.qm-close { bottom: -0.5em; right: 0.8rem; }
.quote-frame-text {
  font-family: var(--font-italic); font-size: 1.25rem;
  font-style: italic; line-height: 1.65; color: var(--warm-white);
}
.quote-frame-text em { font-style: normal; color: var(--gold); }

/* ---- PHOTO FRAME ---- */
.photo-frame-outer { position: relative; }
.photo-frame-outer::before {
  content: ''; position: absolute; inset: -7px;
  border: 1px solid rgba(212,175,55,0.12);
  pointer-events: none; z-index: 0;
}
.photo-frame-inner {
  border: var(--gb); padding: 10px;
  position: relative; z-index: 1; background: var(--charcoal);
}
.photo-frame-inner::after {
  content: ''; position: absolute; inset: 10px;
  background: linear-gradient(to bottom, transparent 55%, rgba(212,175,55,0.07) 100%);
  pointer-events: none;
}
.photo-frame-inner img {
  width: 100%; display: block;
  object-fit: cover; object-position: top center;
  filter: contrast(1.04) brightness(0.97);
}

/* ---- CREDENTIAL GRID ---- */
.cred-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  border: var(--gb); margin: 2rem 0 2.5rem;
}
.cred-item {
  padding: 1.2rem 1.4rem;
  border-right: var(--gb); border-bottom: var(--gb);
}
.cred-item:nth-child(2n)       { border-right: none; }

.cred-item:nth-last-child(-n+2){ border-bottom: none; }
.cred-label { font-size: 0.6rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold); margin-bottom: 0.3rem; }
.cred-value { font-size: 0.82rem; color: var(--warm-white); font-weight: 500; }

/* ---- FOOTER ---- */
.site-footer { background: var(--soft-black); border-top: var(--gb); }
.footer-main {
  padding: 4.5rem 0; display: grid;
  grid-template-columns: 1.2fr 1fr 1fr; gap: 3rem;
  border-bottom: var(--gb);
}
.footer-brand-logo {
  font-family: var(--font-display); font-size: 1rem;
  font-weight: 400; letter-spacing: 0.12em;
  text-transform: uppercase; margin-bottom: 1rem;
}
.footer-brand-logo .human { font-weight: 700; color: var(--gold); }
.footer-tagline { font-size: 0.82rem; color: var(--ww-70); line-height: 1.75; max-width: 26ch; margin-bottom: 1.6rem; }
.footer-col-title { font-size: 0.63rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); margin-bottom: 1.2rem; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.footer-links a { font-size: 0.82rem; color: var(--ww-45); transition: color 0.2s; }
.footer-links a:hover { color: var(--warm-white); }
.social-row { display: flex; gap: 0.8rem; }
.soc-btn {
  width: 34px; height: 34px; border: var(--gb);
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}
.soc-btn:hover { background: rgba(212,175,55,0.1); border-color: var(--gold); }
.soc-btn svg { width: 13px; height: 13px; fill: var(--ww-45); transition: fill 0.2s; }
.soc-btn:hover svg { fill: var(--gold); }

/* Bottom bar */
.footer-bottom {
  padding: 1.5rem 0; display: flex; align-items: center;
  justify-content: space-between; gap: 2rem;
}
.fb-brand { display: flex; align-items: center; gap: 1.6rem; }
.fb-logo {
  font-family: var(--font-display); font-size: 0.88rem;
  font-weight: 400; letter-spacing: 0.12em;
  text-transform: uppercase; white-space: nowrap;
}
.fb-logo .human { font-weight: 700; color: var(--gold); }
.fb-pipe { width: 1px; height: 26px; background: var(--gold-dim); opacity: 0.6; }
.fb-tagline { font-size: 0.7rem; color: var(--ww-45); line-height: 1.5; }
.fb-copy { font-size: 0.67rem; color: var(--ww-20); text-align: center; }
.footer-sig { display: flex; flex-direction: column; align-items: flex-end; gap: 0.2rem; }
.footer-sig img { width: 100px; height: auto; mix-blend-mode: screen; filter: brightness(0.88); }
.footer-sig-name { font-size: 0.58rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ww-20); }

/* ---- SCROLL REVEAL ---- */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity 0.75s ease, transform 0.75s ease; }
[data-reveal].visible { opacity: 1; transform: none; }
[data-d1] { transition-delay: 0.12s; }
[data-d2] { transition-delay: 0.24s; }
[data-d3] { transition-delay: 0.36s; }
[data-d4] { transition-delay: 0.48s; }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  :root { --gutter: 1.25rem; }
  .site-nav { display: none; }
  .nav-toggle { display: flex; }
  .site-nav.open {
    display: flex; flex-direction: column;
    position: fixed; inset: 60px 0 0;
    background: var(--soft-black);
    padding: 2.5rem var(--gutter); gap: 1.8rem;
    z-index: 99; border-top: var(--gb);
  }
  .site-nav.open .nav-link { font-size: 1rem; color: var(--warm-white); }
  .footer-main { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .footer-sig { align-items: flex-start; }
  .cred-grid { grid-template-columns: 1fr; }
  .cred-item { border-right: none; border-bottom: var(--gb); }
  .cred-item:last-child { border-bottom: none; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  .footer-main { grid-template-columns: 1fr 1fr; }
}