/* ---------- Base & Theme ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f9;
  --text: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: rgba(0,0,0,0.08);
  --shadow: 0 4px 16px rgba(0,0,0,0.06);
  --primary: #111827;
  --primary-contrast: #ffffff;
  --nav: color-mix(in oklab, #ffffff 75%, transparent);
}

:root.dark {
  --bg: #0a0a0b;
  --bg-soft: #0f1115;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --card: #0f1115;
  --border: rgba(255,255,255,0.12);
  --shadow: 0 6px 20px rgba(0,0,0,0.35);
  --primary: #ffffff;
  --primary-contrast: #0a0a0b;
  --nav: color-mix(in oklab, #0f1115 75%, transparent);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Sticky Top Navigation ---------- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 999;
  backdrop-filter: saturate(140%) blur(8px);
  background: var(--nav);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 12px;
  background: var(--card);
}
.nav-links {
  display: flex;
  gap: 10px;
}
.nav-link {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
}
.nav-link:hover {
  border-color: var(--border);
  background: color-mix(in oklab, var(--card) 92%, transparent);
}
.nav-link.active {
  border-color: var(--primary);
}

/* ---------- Theme Toggle ---------- */
.toggle {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 1000;
  padding: 10px 12px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card) 92%, transparent);
  box-shadow: var(--shadow);
  cursor: pointer;
}
.toggle .icon { font-size: 16px; }

/* ---------- Hero ---------- */
.hero {
  max-width: 1040px;
  margin: 0px auto 0; /* more top space to clear nav */
  padding: 0 16px;
  text-align: center;
  min-height: 92vh; /* isolate the section more */
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.pill {
  
  display: inline-block;
  padding: 6px 10px;
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
}
.hero h1 {
  margin: 10px 0 0;
  font-size: clamp(36px, 6vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.tagline {
  max-width: 720px;
  margin: 12px auto 0;
  font-size: clamp(14px, 2vw, 18px);
  color: var(--muted);
}
.cta-row {
  margin-top: 24px;
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 10px 16px;
  font-weight: 700;
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: transform 0.15s ease, background 0.2s ease, opacity 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: var(--primary-contrast);
  background: var(--primary);
  border-color: var(--primary);
}
.btn-outline {
  color: var(--text);
  background: transparent;
}
.links {
  margin-top: 16px;
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 14px;
}
.links a { color: var(--muted); text-decoration: none; }
.links a:hover { text-decoration: underline; }

/* ---------- Sections ---------- */
.section {
  max-width: 1040px;
  margin: 0 auto;
  padding: 120px 16px; /* increased spacing around sections */
  min-height: 90vh;   /* ensure each section mostly fills screen */
  scroll-margin-top: 84px; /* anchor offset for sticky nav */
}
.section-head h2 {
  margin: 0;
  font-size: clamp(22px, 4vw, 30px);
}
.section-sub {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- About Layout ---------- */
.about-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 20px;
}
@media (min-width: 820px) {
  .about-card { grid-template-columns: 320px 1fr; }
}
.about-media {
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-wrap {
  position: relative;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow);
}
.avatar-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.avatar-placeholder {
  display: none;
}
.avatar-wrap .avatar-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--text);
  background: repeating-linear-gradient(45deg, color-mix(in oklab, var(--card) 85%, transparent), color-mix(in oklab, var(--card) 85%, transparent) 10px, color-mix(in oklab, var(--bg-soft) 85%, transparent) 10px, color-mix(in oklab, var(--bg-soft) 85%, transparent) 20px);
}
.about-body h3 { margin: 0 0 8px; font-size: 18px; }
.about-body p { margin: 6px 0 0; color: var(--muted); }
.about-body ul { margin: 12px 0 0 18px; color: var(--muted); }

/* ---------- Cards & Grid ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}
.card:hover { transform: translateY(-2px); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 6px 0 0; color: var(--muted); }
.card ul { margin: 12px 0 0 18px; color: var(--muted); }

.link-card { text-decoration: none; color: inherit; display: block; }
.arrow { display: inline-block; margin-top: 10px; font-weight: 600; }
.arrow.muted { opacity: 0.6; }

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}
@media (min-width: 768px) {
  .grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- Footer ---------- */
.footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 100px 16px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- Scroll Animations ---------- */
.fade-in-up {
  opacity: 0;
  transform: translateY(14px);
  will-change: transform, opacity;
}
.fade-in-up.appear {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms cubic-bezier(.2,.65,.3,1), transform 600ms cubic-bezier(.2,.65,.3,1);
}
.resume-cta {
  margin-top: 28px;
}

/* --- Better readability for theme icon in dark mode --- */
:root.dark .toggle .icon {
  color: #fff;
  filter: drop-shadow(0 0 4px rgba(255,255,255,0.25));
}
}
/* --- Animated rainbow border for project cards (colors flow, frame stays still) --- */
#projects .card {
  position: relative;
  z-index: 0;
}

#projects .card::before {
  content: "";
  position: absolute;
  inset: 0;                 /* full size */
  padding: 2px;             /* border thickness */
  border-radius: 22px;      /* match your card radius (card is 20px) */
  pointer-events: none;
  z-index: -1;

  /* Animate only the gradient, not the element */
  --angle: 0deg;
  background: conic-gradient(
    from var(--angle),
    #ff004c,
    #ff7a00,
    #ffd400,
    #4dff00,
    #00ffd5,
    #00a2ff,
    #6a00ff,
    #ff00e6,
    #ff004c
  );

  /* Show as a ring (border) using masks */
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
          mask-composite: exclude;

  /* This animates the gradient internally (no rotation of the box) */
  animation: rainbow-shift 6s linear infinite;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  #projects .card::before { animation: none; }
}

/* Enable smooth interpolation of the custom angle */
@property --angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

@keyframes rainbow-shift {
  to { --angle: 360deg; }
}
/* === Warm animated ring around profile picture (thin) === */
.avatar-wrap {
  position: relative; /* already in your CSS; safe to repeat */
  isolation: isolate; /* ensure pseudo-element layers correctly */
}

/* The animated ring */
.avatar-wrap::after {
  content: "";
  position: absolute;
  inset: 0;                 /* same size as the avatar */
  border-radius: 50%;
  pointer-events: none;
  z-index: 2;

  /* Thin ring thickness  */
  padding: 2px;

  /* Animate only the gradient, not the geometry */
  --angle: 0deg;
  background: conic-gradient(
    from var(--angle),
    #ff2a2a,
    #ff7a00,
    #ffd400,
    #ff7a00,
    #ff2a2a
  );

  /* Show only the ring, not the fill */
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
          mask-composite: exclude;

  /* Smooth flowing colors  */
  animation: warm-ring-shift 8s linear infinite;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .avatar-wrap::after { animation: none; }
}

/* Custom property for the conic-gradient angle */
@property --angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

@keyframes warm-ring-shift {
  to { --angle: 360deg; }
}