/* Apple-inspired minimal design */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #000000;
  --white: #FFFFFF;
  --gray-50: #F9F9F9;
  --gray-100: #F3F3F3;
  --gray-200: #E8E8E8;
  --gray-300: #D3D3D3;
  --gray-400: #8E8E93;
  --gray-600: #3A3A3C;
  --gray-900: #1D1D1F;
  --accent: #D946EF;
  --accent-hover: #E84EE4;
  --accent-secondary: #06B6D4;
  --accent-tertiary: #F97316;
  --accent-text: #A21CAF;
  --accent-rgb: 217, 70, 239;
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  --tracking-tight: -0.011em;
  --tracking-heading: -0.016em;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(4rem + env(safe-area-inset-top));
  background: var(--white);
  overscroll-behavior: none;
}

body {
  background: var(--white);
  color: var(--gray-900);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: var(--tracking-tight);
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  line-height: 1.2;
  color: var(--gray-900);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
}

.display {
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.018em;
  line-height: 1.1;
}

.section-label {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-600);
  display: inline-block;
  margin-bottom: 1rem;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; position: relative; z-index: 1; }
section { padding: 6rem 0; }

/* Shared positioning for each section's decorative glow/grain layer;
   individual sections below only need to set background-image. */
#hero::before,
#about::before,
#toolkit::before,
#experience::before,
#achievements::before,
#community::before,
#education::before,
#contact::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.divider {
  width: 40px;
  height: 1px;
  background: var(--gray-300);
  margin: 1.5rem 0;
}

.divider-center {
  width: 40px;
  height: 1px;
  background: var(--gray-300);
  margin: 1.5rem auto;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--black);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 600;
  z-index: 1100;
  font-family: var(--font-sans);
  font-size: 0.85rem;
}
.skip-link:focus { top: 0; }

/* Navigation */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: calc(0.75rem + env(safe-area-inset-top)) 2rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.85);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-100);
  -webkit-transform: translate3d(0,0,0);
  transform: translate3d(0,0,0);
}

.nav-brand {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--gray-900);
  letter-spacing: var(--tracking-tight);
}

.nav-links { display: flex; gap: 2rem; list-style: none; }

.nav-links a {
  font-family: var(--font-sans);
  color: var(--gray-600);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: var(--tracking-tight);
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--gray-900); }
.nav-links a:hover::after { width: 100%; }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--gray-900);
  margin: 4px 0;
  transition: all 0.3s;
  border-radius: 1px;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Focus Styles */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Hero */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(7rem + env(safe-area-inset-top)) 0 4rem;
  position: relative;
  overflow: hidden;
  background: var(--white);
}

#hero::before {
  background-image:
    radial-gradient(circle 450px at 88% 8%, rgba(var(--accent-rgb), 0.14), transparent),
    radial-gradient(circle 500px at 8% 92%, rgba(6, 182, 212, 0.12), transparent),
    var(--grain);
}

.hero-inner {
  padding: 0 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-heading { margin-bottom: 1.5rem; }
.hero-heading .accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-heading .line-2 { display: block; }
.hero-heading .love-emphasis {
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-tertiary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-style: normal;
}

.hero-role {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--gray-600);
  margin-bottom: 1rem;
  letter-spacing: var(--tracking-tight);
}

.hero-sub {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  color: var(--gray-600);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
}

.hero-expertise {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--gray-600);
  font-weight: 500;
}

.hero-expertise-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-expertise-item::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gray-300);
  flex-shrink: 0;
}

.hero-expertise-item:first-child::before {
  display: none;
}

.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
  letter-spacing: var(--tracking-tight);
  border-radius: 8px;
}

.btn-icon {
  width: 1.1em;
  height: 1.1em;
  display: inline-block;
  flex-shrink: 0;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-tertiary) 100%);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover) 0%, #FF8A3D 100%);
  box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.4);
  transform: translateY(-2px);
}
.btn-primary:active { opacity: 0.9; }

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  transition: all 0.3s;
}
.btn-ghost:hover {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
  box-shadow: 0 4px 15px rgba(var(--accent-rgb), 0.2);
  transform: translateY(-2px);
}

.btn-big { padding: 1rem 2.5rem; font-size: 0.95rem; }

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Mobile */
@media (max-width: 768px) {
  html { scroll-padding-top: 3.5rem; }
  section { padding: 4rem 0; }
  nav { padding: calc(0.6rem + env(safe-area-inset-top)) 1.5rem 0.6rem; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s, visibility 0s linear 0.3s;
    z-index: 999;
  }
  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transition: opacity 0.3s;
  }
  .nav-links a { font-size: 1rem; }
  #hero { padding: calc(6rem + env(safe-area-inset-top)) 0 3rem; }
  .hero-inner { padding: 0 1.5rem; }
  .hero-role { font-size: 1rem; }
  .hero-sub { font-size: 0.95rem; }
  .hero-expertise { font-size: 0.9rem; }
  .btn-big { padding: 0.95rem 2rem; font-size: 0.9rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .hero-inner { padding: 0 1rem; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  section { padding: 3rem 0; }
}