/* -------------------------------------------------
   Francis Oyitoba — Premium UI Theme (Light default)
   - Theme tokens for light (default) & [data-theme="dark"]
   - Gradient hero, glass header, refined components
   - Accessible focus, reduced motion, responsive grid
-------------------------------------------------- */

/* Reset & base */
*,
*::before,
*::after { box-sizing: border-box; }
html, body { height: 100%; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
img, picture { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; }
button { border: 0; background: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* Tokens — LIGHT (default) */
:root{
  /* Brand */
  --brand-500:#6366f1; --brand-600:#4f46e5; --brand-700:#4338ca;
  --violet-500:#7c3aed; --teal-500:#14b8a6;

  /* Neutrals — light */
  --bg:#f6f8fb;
  --surface:#ffffff;
  --surface-2:#f2f4f8;
  --text:#10131a;
  --muted:#5b6473;
  --border:rgba(16,19,26,.12);

  /* Typography */
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  --fs-hero: clamp(2rem, 3.4vw + 1rem, 3.25rem);
  --fs-h2: clamp(1.35rem, 1.2vw + 1rem, 1.75rem);
  --fs-lead: clamp(1.05rem, .4vw + 1rem, 1.2rem);
  --fs-base: 1rem;
  --fs-small: .925rem;

  /* Layout & effects */
  --radius-lg: 18px;
  --radius: 14px;
  --radius-sm: 10px;
  --space-1:.25rem; --space-2:.5rem; --space-3:.75rem; --space-4:1rem;
  --space-6:1.5rem; --space-8:2rem; --space-10:2.5rem; --space-12:3rem;
  --shadow-1: 0 10px 30px rgba(0,0,0,.08);
  --shadow-2: 0 30px 80px rgba(0,0,0,.12);

  /* Gradients */
  --grad-hero:
    radial-gradient(1200px 600px at 5% -10%, rgba(99,102,241,.18), transparent 60%),
    radial-gradient(1200px 700px at 105% 10%, rgba(124,58,237,.15), transparent 50%),
    linear-gradient(180deg, #f6f8fb, #ecf1f7 55%);
}

/* Tokens — DARK overrides */
html[data-theme="dark"]{
  --bg:#0b0d12;
  --surface:#10131a;
  --surface-2:#131824;
  --text:#e6eaf2;
  --muted:#a7b0c0;
  --border:rgba(255,255,255,.08);

  --shadow-1: 0 12px 36px rgba(0,0,0,.35);
  --shadow-2: 0 50px 120px rgba(0,0,0,.5);

  --grad-hero:
    radial-gradient(1200px 600px at 10% -10%, rgba(99,102,241,.35), transparent 60%),
    radial-gradient(1200px 700px at 110% 10%, rgba(124,58,237,.28), transparent 50%),
    linear-gradient(180deg, #0c111b, #0b0d12 55%);
}

/* Body */
body{
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg), var(--surface-2) 70%);
  background-attachment: fixed;
}

/* Container */
.container{ width:min(1120px, 92vw); margin-inline:auto; }

/* A11y */
.sr-only{ position:absolute!important; width:1px; height:1px; overflow:hidden; clip:rect(1px,1px,1px,1px); white-space:nowrap; }
.skip-link{
  position:absolute; left:-9999px; top:auto;
}
.skip-link:focus{
  left:1rem; top:1rem; background:var(--brand-600); color:#fff; padding:.5rem .75rem; border-radius:10px; z-index:9999;
}

/* Header / nav */
.site-header{
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in oklab, var(--surface) 85%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; padding:.8rem 0; gap:.75rem; }
.brand{ display:flex; align-items:center; gap:.6rem; font-weight:800; letter-spacing:.2px; color: var(--text); }
.brand-dot1{ width:10px; height:10px; border-radius:999px; background: var(--brand-600); box-shadow: 0 0 0 8px color-mix(in srgb, var(--brand-600) 28%, transparent); }
.brand-text{ font-weight:800; }
.brand-dot {
  --size: 36px; /* Adjust for small/large versions */
  width: var(--size);
  height: var(--size);
  border-radius: 30% / 35%;
  background: conic-gradient(
      from -45deg,
      var(--brand-500) 0 25%,
      var(--brand-600) 25% 50%,
      var(--violet-500) 50% 75%,
      var(--teal-500) 75% 100%
    );
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--brand-600) 20%, transparent),
    var(--shadow-1);
  display: inline-block;
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.brand-logo::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 30% 30%,
    rgba(255,255,255,0.6) 0%,
    transparent 50%
  );
  mix-blend-mode: soft-light;
}

.brand-logo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    145deg,
    rgba(255,255,255,0.12) 0%,
    rgba(0,0,0,0.15) 100%
  );
  mix-blend-mode: overlay;
}

/* Header controls */
.header-ctas{ display:flex; align-items:center; gap:.6rem; }
.theme-toggle{
  display:inline-flex; align-items:center; gap:.45rem;
  padding:.5rem .7rem; border-radius:999px;
  background: color-mix(in srgb, var(--surface-2) 85%, transparent);
  border:1px solid var(--border); color: var(--text); font-weight:800; font-size:.92rem;
}
.theme-toggle .icon-sun{ display:none; }
html[data-theme="dark"] .theme-toggle .icon-moon{ display:none; }
html[data-theme="dark"] .theme-toggle .icon-sun{ display:inline-block; }
.theme-toggle .theme-label{ color: var(--muted); }

/* Nav links */
.nav-links{ display:flex; align-items:center; gap:.9rem; }
.nav-links a{ color: var(--muted); font-weight:600; font-size:.95rem; padding:.45rem .6rem; border-radius:10px; transition: all .2s ease; }
.nav-links a:hover{ color: var(--text); background: color-mix(in srgb, var(--surface-2) 70%, transparent); }
.nav-links .btn-small{ padding:.45rem .8rem; font-size:.9rem; color: white; }

/* Mobile nav */
.nav-toggle{ display:none; width:42px; height:42px; border-radius:12px; background: color-mix(in srgb, var(--surface) 85%, transparent); border:1px solid var(--border); position:relative; }
.nav-toggle-bar, .nav-toggle-bar::before, .nav-toggle-bar::after{
  position:absolute; left:10px; right:10px; height:2px; background: var(--text); content:""; border-radius:2px; transition: transform .2s ease, top .2s ease;
}
.nav-toggle-bar{ top:20px; }
.nav-toggle-bar::before{ top:-8px; }
.nav-toggle-bar::after{ top:8px; }
@media (max-width: 900px){
  .nav-toggle{ display:block; }
  .nav-links{ position:absolute; inset: 64px 0 auto 0; display:none; flex-direction:column; gap:.2rem; padding:.5rem; background: var(--surface); border-bottom:1px solid var(--border); }
  .nav-links.open{ display:flex; }
}

/* Hero */
.hero{
  background: var(--grad-hero);
  padding: var(--space-12) 0 var(--space-8);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-1);
}
.hero-grid{ display:grid; gap: var(--space-8); grid-template-columns: 1fr; }
@media(min-width: 900px){ .hero-grid{ grid-template-columns: 1.2fr .8fr; align-items:center; } }
.eyebrow{ color: var(--muted); font-weight:700; text-transform: uppercase; letter-spacing:.08em; margin-bottom:.3rem; }
h1{ font-size: var(--fs-hero); line-height:1.05; letter-spacing:-.02em; color: var(--text); }
.accent{ background: linear-gradient(90deg, var(--brand-600), var(--violet-500)); -webkit-background-clip:text; background-clip:text; color: transparent; }
.lead{ font-size: var(--fs-lead); color: color-mix(in srgb, var(--text) 85%, var(--muted)); margin-top:.6rem; }

.hero-cta{ display:flex; gap:.6rem; flex-wrap:wrap; margin-top: var(--space-6); }
.hero-highlights{ margin-top: var(--space-6); display:grid; gap:.45rem; }
.hero-highlights li{ display:flex; align-items:center; gap:.5rem; color: var(--muted); }
.hero-highlights i{ color: var(--teal-500); }

.hero-portrait{ display:grid; place-items:center; }
.avatar{
  width: min(420px, 70vw); aspect-ratio: 1/1; object-fit: cover; border-radius: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-2), 0 0 0 10px rgba(79,70,229,.10);
}

/* Section chips */
.section-nav{ margin-top: var(--space-8); display:flex; flex-wrap:wrap; gap:.5rem; }
.section-nav a{
  padding:.5rem .8rem; border:1px solid var(--border); border-radius:999px; font-weight:700; font-size:.9rem;
  background: color-mix(in srgb, var(--surface) 85%, transparent);
  color: var(--muted);
}
.section-nav a:hover{ color: var(--text); border-color: color-mix(in srgb, var(--brand-600) 40%, var(--border)); }

/* Sections */
.section{ padding: var(--space-10) 0; }
.section.alt{ background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, transparent), transparent); }
.section-title{ font-size: var(--fs-h2); letter-spacing:-.01em; margin-bottom: .6rem; font-weight:800; color: var(--text); }
.section-title .subtitle{ font-size: .9rem; color: var(--muted); font-weight:800; margin-left:.35rem; text-transform:uppercase; letter-spacing:.06em; }

/* Layout helpers */
.grid-2{ display:grid; gap: var(--space-8); grid-template-columns: 1fr; }
@media(min-width: 900px){ .grid-2{ grid-template-columns: 1.1fr .9fr; } }
.cards-3{ display:grid; gap: var(--space-6); grid-template-columns: 1fr; line-height: 1.6; margin-bottom: 1em; }
@media(min-width: 900px){ .cards-3{ grid-template-columns: repeat(3, 1fr); } }

/* Cards & lists */
.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-1);
}
.card-title{ font-weight:800; margin-bottom:.5rem; color: var(--text); }
.list{ margin: .4rem 0 0 1rem; display:grid; gap:.4rem; }
.list li{ color: color-mix(in srgb, var(--text) 92%, var(--muted)); }
.checks{ list-style: none; margin: .6rem 0 0 0; padding:0; display:grid; gap:.35rem; }
.checks li::before{ content:"✔"; color: var(--teal-500); margin-right:.5rem; }

/* Services */
.card-service .pill{
  display:inline-block; padding:.35rem .6rem; border-radius:999px; font-weight:800; font-size:.8rem;
  background: color-mix(in srgb, var(--brand-600) 12%, transparent);
  border:1px solid color-mix(in srgb, var(--brand-600) 30%, var(--border));
  color: color-mix(in srgb, var(--brand-700) 85%, black);
  margin-bottom: 20px;
}
.card-service .meta{ color: var(--muted); margin:.25rem 0 .4rem; }

/* Skills */
.skills{ display:flex; flex-wrap:wrap; gap:.5rem; }
.badge{
  display:inline-flex; align-items:center; gap:.4rem;
  background: color-mix(in srgb, var(--surface-2) 85%, transparent);
  border:1px solid var(--border);
  padding:.45rem .7rem; border-radius:999px; font-size:.9rem; font-weight:800; color: color-mix(in srgb, var(--text) 90%, var(--muted));
}
.badge i{ opacity:.9; }

/* Projects */
.cards-projects{ display:grid; gap: var(--space-6); grid-template-columns: 1fr; }
@media(min-width: 980px){ .cards-projects{ grid-template-columns: repeat(3, 1fr); } }

.project{ transition: transform .15s ease; }
.project:hover{ transform: translateY(-2px); }
.project-media{ position:relative; overflow:hidden; border-radius: 14px; border:1px solid var(--border); }
.project-media img{ width:100%; height:auto; display:block; transform: scale(1.02); transition: transform .35s ease; }
.project:hover .project-media img{ transform: scale(1.06); }
.status{
  position:absolute; top:10px; right:10px; font-size:.7rem; font-weight:800; letter-spacing:.08em;
  color:#fff; padding:.25rem .5rem; border-radius:999px; text-transform:uppercase; box-shadow: var(--shadow-1);
}
.status.live{ background: var(--teal-500); }
.status.private{ background: #f59e0b; }

.project-body{ margin-top:.8rem; line-height: 1.6; margin-bottom: 1em; }
.project-body h3{ font-weight:800; margin-bottom:.2rem; color: var(--text); }
.project-role{ font-size:.95rem; color: var(--muted); margin: .8rem 0; }
.tech{ font-size:.95rem; color: color-mix(in srgb, var(--text) 86%, var(--muted)); }
.link{ color: var(--brand-600); font-weight:800; }
.link:hover{ text-decoration: underline; }

/* Testimonials */
.quote{
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 6px solid var(--brand-600);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: var(--shadow-1);
  color: color-mix(in srgb, var(--text) 92%, var(--muted));
}
.quote cite{ display:block; margin-top:.6rem; font-weight:800; color: var(--text); }
.quote cite span{ color: var(--muted); font-weight:800; margin-left:.25rem; }

/* FAQ */
.faq details{
  background: var(--surface); border:1px solid var(--border); border-radius: var(--radius);
  padding: .9rem 1rem; box-shadow: var(--shadow-1);
}
.faq details + details{ margin-top:.6rem; }
.faq summary{ cursor:pointer; font-weight:800; color: var(--text); }
.faq p{ color: color-mix(in srgb, var(--text) 88%, var(--muted)); margin-top:.4rem; }

/* Contact */
.contact-cards{ display:grid; gap: var(--space-6); grid-template-columns: 1fr; }
@media(min-width: 760px){ .contact-cards{ grid-template-columns: repeat(3, 1fr); } }
.card.contact{ display:flex; align-items:center; gap:.8rem; }
.card.contact i{ font-size:1.3rem; color: var(--brand-600); }

/* Buttons */
.btn{
  --bg: color-mix(in srgb, var(--surface) 85%, transparent);
  --fg: var(--text);
  --bd: var(--border);
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding:.8rem 1rem; font-weight:800; border-radius:12px;
  background: var(--bg); color: var(--fg); border:1px solid var(--bd);
  transition: transform .06s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0); }
.btn-primary{
  --bg: linear-gradient(135deg, var(--brand-600), var(--violet-500));
  --fg: #fff; --bd: color-mix(in srgb, var(--brand-600) 65%, black 10%);
  box-shadow: 0 15px 40px rgba(79,70,229,.28);
}
.btn-outline{ --bg: transparent; --fg: var(--brand-600); --bd: color-mix(in srgb, var(--brand-600) 45%, var(--border)); }
.btn-ghost{ --bg: transparent; --fg: var(--muted); --bd: transparent; }
.center{ text-align:center; margin-top: 1rem; }

/* Footer */
.site-footer{
  border-top:1px solid var(--border);
  padding: var(--space-8) 0;
  color: var(--muted);
}

/* Focus & motion */
:focus-visible{ outline: 3px solid color-mix(in srgb, var(--brand-600) 60%, white 20%); outline-offset: 2px; border-radius: 10px; }
@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}

/* Selection */
::selection{ background: color-mix(in srgb, var(--brand-600) 40%, transparent); color:#fff; }