/* ==========================================================
   DESIGN TOKENS
   ========================================================== */
:root{
  --primary:        #170801;
  --primary-deep:    #0D0400;
  --primary-soft:    #241207;
  --surface:         #1B0C04;
  --surface-2:       #241407;
  --border:          rgba(245, 239, 230, 0.10);
  --border-strong:   rgba(245, 239, 230, 0.18);

  --accent:          #B08D57;
  --accent-soft:     #D8C39D;
  --accent-dim:      rgba(176, 141, 87, 0.14);

  --text:            #F5EFE6;
  --text-muted:      #AC9C8C;
  --text-faint:      #8A7B6E;

  --header-bg:          rgba(13, 4, 0, 0.72);
  --header-bg-scrolled: rgba(13, 4, 0, 0.94);
  --mobile-menu-bg:     rgba(13, 4, 0, 0.98);

  --font-heading: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-body:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --container: 1140px;
  --radius: 6px;
  --transition: 0.25s ease;

  color-scheme: dark;
}

/* ---------- LIGHT THEME OVERRIDES ---------- */
:root[data-theme="light"]{
  --primary:        #F6EFE6;
  --primary-deep:    #EFE4D4;
  --primary-soft:    #FBF7F1;
  --surface:         #FFFFFF;
  --surface-2:       #F7EFE3;
  --border:          rgba(23, 8, 1, 0.10);
  --border-strong:   rgba(23, 8, 1, 0.20);

  --accent:          #8A5A2B;
  --accent-soft:     #6B4520;
  --accent-dim:      rgba(138, 90, 43, 0.12);

  --text:            #241207;
  --text-muted:      #5A4433;
  --text-faint:      #7A6552;

  --header-bg:          rgba(255, 255, 255, 0.78);
  --header-bg-scrolled: rgba(255, 255, 255, 0.96);
  --mobile-menu-bg:     rgba(255, 251, 245, 0.98);

  color-scheme: light;
}

/* ==========================================================
   RESET
   ========================================================== */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background:
    radial-gradient(1200px 600px at 85% -10%, var(--accent-dim), transparent 60%),
    linear-gradient(165deg, var(--primary) 0%, var(--primary-deep) 55%, var(--primary) 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
h1,h2,h3,h4{ font-family: var(--font-heading); margin:0; font-weight:600; }
p{ margin:0 0 14px; color: var(--text-muted); }
button{ font-family:inherit; cursor:pointer; }
::selection{ background: var(--accent); color: var(--primary-deep); }

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

/* ==========================================================
   REVEAL ON SCROLL
   ========================================================== */
.reveal{
  opacity:0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in-view{ opacity:1; transform:none; }

/* ==========================================================
   SECTION LABEL (eyebrow)
   ========================================================== */
.section-label{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom: 48px;
}
.section-label span{
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-soft);
  white-space:nowrap;
}
.section-label .rule{
  flex:1;
  height:1px;
  background: linear-gradient(to right, var(--border-strong), transparent);
}
.section-title{
  font-size: clamp(26px, 3.2vw, 36px);
  letter-spacing: -0.01em;
  margin-bottom: 44px;
}

section{
  padding: 110px 0;
  position:relative;
}
section:nth-of-type(even){
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.14) 50%, transparent);
}

/* ==========================================================
   HEADER / NAV
   ========================================================== */
#site-header{
  position: fixed;
  top:0; left:0; right:0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
#site-header.scrolled{
  background: var(--header-bg-scrolled);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.28);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 20px;
  padding: 14px 24px;
  max-width: var(--container);
  margin:0 auto;
}
.brand-group{
  display:flex;
  align-items:center;
  gap: 12px;
}
.coa-logo{
  height: 34px;
  width: auto;
  display:block;
  flex-shrink:0;
}
.brand{
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight:700;
  letter-spacing: 0.02em;
  white-space:nowrap;
}
.brand span{ color: var(--accent); }

/* ---------- header right controls (lang + theme) ---------- */
.header-controls{
  display:flex;
  align-items:center;
  gap: 10px;
  margin-left: auto;
}
.lang-switch{
  display:flex;
  align-items:center;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  flex-shrink:0;
}
.lang-switch button{
  border:none;
  background:transparent;
  color: var(--text-faint);
  font-family: var(--font-heading);
  font-size: 11px;
  font-weight:700;
  letter-spacing: 0.04em;
  padding: 6px 10px;
  border-radius: 999px;
  transition: background var(--transition), color var(--transition);
}
.lang-switch button.active{
  background: var(--accent);
  color: var(--primary-deep);
}
.theme-toggle{
  display:flex;
  align-items:center;
  justify-content:center;
  width: 34px; height: 34px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text);
  flex-shrink:0;
  transition: border-color var(--transition), color var(--transition);
}
.theme-toggle:hover{ border-color: var(--accent); color: var(--accent-soft); }
.theme-toggle svg{ width: 16px; height: 16px; }
.theme-toggle .icon-moon{ display:block; }
.theme-toggle .icon-sun{ display:none; }
:root[data-theme="light"] .theme-toggle .icon-moon{ display:none; }
:root[data-theme="light"] .theme-toggle .icon-sun{ display:block; }

.nav-menu{
  display:flex;
  align-items:center;
  gap: 36px;
}
.nav-menu a{
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-transform: uppercase;
  position:relative;
  padding: 6px 0;
  transition: color var(--transition);
}
.nav-menu a::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:0;
  height:1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.nav-menu a:hover,
.nav-menu a.active{ color: var(--text); }
.nav-menu a:hover::after,
.nav-menu a.active::after{ transform: scaleX(1); }

.nav-toggle{
  display:none;
  width: 40px; height: 40px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: transparent;
  align-items:center;
  justify-content:center;
}
.nav-toggle img{ width: 18px; height: 18px; }

/* ==========================================================
   HERO
   ========================================================== */
#home{
  min-height: 100svh;
  display:flex;
  align-items:center;
  padding-top: 100px;
  position:relative;
  overflow:hidden;
  isolation:isolate;
}

/* ---- rotating full-bleed background (photos + video, always cropped landscape) ---- */
.hero-bg{
  position:absolute;
  inset:0;
  z-index:-2;
  background: var(--primary-deep);
}
.hero-bg-layer{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit: cover;
  object-position: center 30%;
  opacity:0;
  transition: opacity 1.1s ease;
}
.hero-bg-layer.active{ opacity:1; }
.hero-bg-scrim{
  position:absolute;
  inset:0;
  z-index:-1;
  background:
    linear-gradient(180deg, rgba(13,4,0,0.72) 0%, rgba(13,4,0,0.45) 38%, rgba(13,4,0,0.82) 100%),
    linear-gradient(90deg, rgba(13,4,0,0.55) 0%, rgba(13,4,0,0.15) 55%, rgba(13,4,0,0.55) 100%);
  transition: background var(--transition);
}
:root[data-theme="light"] .hero-bg-scrim{
  background:
    linear-gradient(180deg, rgba(246,239,230,0.82) 0%, rgba(246,239,230,0.55) 38%, rgba(246,239,230,0.88) 100%),
    linear-gradient(90deg, rgba(246,239,230,0.6) 0%, rgba(246,239,230,0.15) 55%, rgba(246,239,230,0.6) 100%);
}

.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items:end;
  position:relative;
}
.hero-eyebrow{
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 22px;
}
.hero-content h1{
  font-size: clamp(38px, 5.6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.hero-content .role{
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--accent-soft);
  margin-bottom: 18px;
  font-family: var(--font-heading);
  font-weight: 500;
}
.hero-content .tagline{
  max-width: 480px;
  font-size: 16px;
  margin-bottom: 34px;
}
.hero-actions{
  display:flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-family: var(--font-heading);
  font-weight: 600;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn img{ width:16px; height:16px; }
.btn-primary{
  background: var(--accent);
  color: var(--primary-deep);
}
.btn-primary:hover{ background: var(--accent-soft); }
.btn-outline{
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-outline:hover{ border-color: var(--accent); color: var(--accent-soft); }

.hero-photo{
  display:flex;
  justify-content:center;
  align-items:flex-end;
  height: clamp(360px, 52vw, 560px);
}
.photo-frame{
  width: min(320px, 100%);
  height: 100%;
  position:relative;
}
.photo-frame img{
  width:100%; height:100%;
  object-fit: contain;
  object-position: bottom center;
  filter: drop-shadow(0 24px 34px rgba(0,0,0,0.45));
}
.photo-caption{
  text-align:center;
  margin-top: 16px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ==========================================================
   ABOUT
   ========================================================== */
.about-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
}
#about-text p{ font-size: 16px; }
.about-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
  padding: 28px;
}
.about-card .field{
  display:flex;
  justify-content:space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.about-card .field:last-child{ border-bottom:none; }
.about-card .field span:first-child{ color: var(--text-faint); }
.about-card .field span:last-child{ color: var(--text); text-align:right; }

/* ==========================================================
   SKILLS
   ========================================================== */
.skills-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.skill-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
  padding: 30px;
  transition: border-color var(--transition), transform var(--transition);
}
.skill-card:hover{ border-color: var(--border-strong); transform: translateY(-4px); }
.skill-card h3{
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 20px;
}
.skill-card ul li{
  font-size: 15px;
  padding: 9px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}
.skill-card ul li:first-child{ border-top:none; }

/* ==========================================================
   EXPERIENCE
   ========================================================== */
.timeline{
  border-left: 1px solid var(--border-strong);
  padding-left: 36px;
  margin-left: 8px;
}
.timeline-item{
  position:relative;
  padding-bottom: 40px;
}
.timeline-item:last-child{ padding-bottom:0; }
.timeline-item::before{
  content:"";
  position:absolute;
  left: -41px; top: 4px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--accent);
}
.timeline-period{
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  text-transform: uppercase;
}
.timeline-item h3{ font-size: 19px; margin: 8px 0 4px; }
.timeline-org{ color: var(--text-faint); font-size: 14px; margin-bottom: 8px; }
.timeline-item p:last-child{ font-size: 14px; max-width: 620px; }

/* ==========================================================
   EDUCATION
   ========================================================== */
.education-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.edu-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
}
.edu-period{
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent-soft); font-family: var(--font-heading);
}
.edu-card h3{ font-size: 17px; margin: 8px 0 4px; }
.edu-card p{ font-size: 14px; margin:0; }

/* ==========================================================
   PROJECTS
   ========================================================== */
.project-list{
  display:flex;
  flex-direction:column;
  gap: 20px;
}
.project-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
  padding: 32px;
  transition: border-color var(--transition);
}
.project-card:hover{ border-color: var(--border-strong); }
.project-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 16px;
  flex-wrap:wrap;
  margin-bottom: 12px;
}
.project-head h3{ font-size: 20px; max-width: 560px; }
.project-head .tag{
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-soft);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  padding: 5px 12px;
  white-space:nowrap;
}
.project-card p{ font-size: 15px; max-width: 620px; }
.stack{ display:flex; gap:10px; flex-wrap:wrap; margin-top: 8px; }
.stack span{
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 3px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* ==========================================================
   CERTIFICATES
   ========================================================== */
.cert-featured{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}
.cert-card{
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 22px;
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
}
.cert-card h3{ font-size: 15px; margin-bottom: 8px; }
.cert-card span{ font-size: 12px; color: var(--text-faint); letter-spacing: 0.02em; }

details{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
  padding: 20px 24px;
}
summary{
  cursor:pointer;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-soft);
  font-family: var(--font-heading);
  list-style:none;
}
summary::-webkit-details-marker{ display:none; }
summary::before{ content:"+  "; }
details[open] summary::before{ content:"–  "; }
.cert-additional{
  margin-top: 16px;
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 24px;
}
.cert-row{
  display:flex;
  flex-direction:column;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.cert-row strong{ color: var(--text); font-size: 14px; }
.cert-row span{ color: var(--text-faint); font-size: 12px; margin-top:2px; }

/* ==========================================================
   CONTACT
   ========================================================== */
.contact-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items:center;
}
.contact-grid h2{
  font-size: clamp(30px, 4vw, 46px);
  line-height:1.15;
  margin-bottom: 18px;
}
.contact-grid > div:first-child p{ max-width: 420px; }
.contact-links{
  display:flex;
  flex-direction:column;
  gap: 14px;
}
.contact-link{
  display:flex;
  align-items:center;
  gap: 14px;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), var(--surface-2));
  transition: border-color var(--transition), transform var(--transition);
}
.contact-link:hover{ border-color: var(--accent); transform: translateX(4px); }
.contact-link img{ width: 20px; height: 20px; opacity:0.9; }
.contact-link .label{
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  display:block;
  margin-bottom: 2px;
}
.contact-link .value{ font-size: 15px; color: var(--text); }

/* ==========================================================
   FOOTER
   ========================================================== */
footer{
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-faint);
}

/* ==========================================================
   RESPONSIVE
   ========================================================== */
@media (max-width: 960px){
  .hero-grid, .about-grid, .contact-grid{
    grid-template-columns: 1fr;
  }
  .hero-photo{ order:-1; }
  .skills-grid, .cert-featured, .education-grid{
    grid-template-columns: 1fr;
  }
  .cert-additional{ grid-template-columns: 1fr; }
}

@media (max-width: 760px){
  .nav-inner{ flex-wrap: nowrap; gap: 10px; padding: 14px 16px; }
  .brand{ font-size: 15px; max-width: 34vw; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
  .coa-logo{ height: 28px; }
  .header-controls{ gap: 6px; }
  .lang-switch button{ padding: 5px 8px; font-size: 10px; }
  .theme-toggle{ width: 30px; height: 30px; }
  .nav-menu{
    position:fixed;
    top: 68px; left:0; right:0;
    flex-direction:column;
    align-items:flex-start;
    gap: 0;
    background: var(--mobile-menu-bg);
    border-bottom: 1px solid var(--border);
    max-height:0;
    overflow:hidden;
    transition: max-height var(--transition);
  }
  .nav-menu.open{ max-height: 420px; }
  .nav-menu a{
    width:100%;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle{ display:flex; }
  section{ padding: 80px 0; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
  html{ scroll-behavior: auto; }
}