/* ---------- Design tokens ---------- */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f2f0fb;
  --color-text: #1e1b2e;
  --color-text-muted: #5b5570;
  --color-primary: #6d28d9;
  --color-primary-dark: #4c1d95;
  --color-border: #e3dff2;
  --color-pill-bg: #ede9fe;
  --color-pill-text: #4c1d95;

  --hero-grad-1: #2e1065;
  --hero-grad-2: #9333ea;

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

  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.5vw, 1.4rem);
  --step-2:  clamp(1.44rem, 1.3rem + 0.7vw, 1.75rem);
  --step-3:  clamp(1.9rem, 1.6rem + 1.2vw, 2.5rem);

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;

  --radius: 1rem;
  --radius-sm: 0.6rem;
  --max-width: 56rem;
  --shadow-card: 0 1px 3px rgba(30, 20, 60, 0.06), 0 8px 24px rgba(30, 20, 60, 0.06);
}

/* This site always uses the light theme below, regardless of system
   dark-mode setting, so it reads consistently like a real website. */

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg-alt);
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: var(--step-3); margin: 0.2rem 0 0; color: #fff; }
h2 { font-size: var(--step-2); margin: 0.2rem 0 var(--space-md); }
h3 { font-size: var(--step-1); margin: var(--space-md) 0 var(--space-xs); }
h4 {
  font-size: var(--step-0);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: var(--space-md) 0 var(--space-xs);
}

p {
  margin: 0 0 var(--space-sm);
  max-width: 65ch;
}

a {
  color: var(--color-primary);
}

a:hover,
a:focus-visible {
  color: var(--color-primary-dark);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-xs) var(--space-md);
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

.kicker {
  margin: 0 0 0.3rem;
  font-size: var(--step--1);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.kicker-light {
  color: #d9c7fb;
}

/* ---------- Hero header ---------- */
.site-header {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-lg) var(--space-md) 0;
}

.hero {
  background: linear-gradient(135deg, var(--hero-grad-1), var(--hero-grad-2));
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
}

.hero-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-lg);
}

.hero-main {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.avatar {
  flex-shrink: 0;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--step-1);
  color: var(--hero-grad-1);
  background: linear-gradient(160deg, #ffffff, #ddc9fb);
  overflow: hidden;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tagline {
  margin: 0.2rem 0 0;
  font-size: var(--step-1);
  color: rgba(255, 255, 255, 0.85);
}

address {
  font-style: normal;
}

.hero-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-sm);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  background: #fff;
  color: var(--color-primary-dark);
  border: none;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  font-size: var(--step--1);
  cursor: pointer;
  box-shadow: var(--shadow-card);
}

.btn-download:hover,
.btn-download:focus-visible {
  background: #f2e9ff;
}

.contact-card {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: var(--space-md) var(--space-lg);
}

.contact-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto auto;
  gap: 0.35rem var(--space-md);
  font-size: var(--step--1);
}

.contact-card div {
  display: contents;
}

.contact-card dt {
  font-weight: 700;
  color: rgba(255, 255, 255, 0.75);
}

.contact-card dd {
  margin: 0;
  color: #fff;
}

.contact-card a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* ---------- Floating nav ---------- */
.site-nav {
  max-width: var(--max-width);
  margin: var(--space-md) auto 0;
  padding-inline: var(--space-md);
  position: sticky;
  top: var(--space-sm);
  z-index: 10;
}

.nav-list {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  box-shadow: var(--shadow-card);
  padding: 0.6rem var(--space-md);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.2rem var(--space-md);
}

.nav-list a {
  display: inline-block;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--step--1);
  color: var(--color-text-muted);
}

.nav-list a:hover,
.nav-list a:focus-visible,
.nav-list a.active {
  color: var(--color-primary);
  background: var(--color-pill-bg);
}

/* ---------- Main layout ---------- */
main {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
  padding-block: var(--space-lg) var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* ---------- Card sections ---------- */
main > section,
main > aside {
  background: linear-gradient(180deg, #ffffff, #fbfaff);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: var(--space-lg);
}

main > section > article + article {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* ---------- Skills grid ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--space-md);
}

.skills-grid article {
  background: linear-gradient(180deg, #f6f4fd, #efe9fb);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
}

.skills-grid h3 {
  margin-top: 0;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.pill-list li {
  background: var(--color-pill-bg);
  color: var(--color-pill-text);
  font-size: var(--step--1);
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
}

/* ---------- Definition list ---------- */
.detail-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.25rem var(--space-md);
  margin: var(--space-sm) 0;
}

.detail-list div {
  display: contents;
}

.detail-list dt {
  font-weight: 600;
  color: var(--color-text-muted);
}

.detail-list dd {
  margin: 0;
}

/* ---------- Bullet lists ---------- */
.detail-bullets,
.coursework-list {
  display: grid;
  gap: 0.4rem;
}

.detail-bullets li,
.coursework-list li {
  position: relative;
  padding-left: 1.1rem;
}

.detail-bullets li::before,
.coursework-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--color-primary);
}

.coursework-list {
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

/* ---------- Aside ---------- */
aside#more h3:first-of-type {
  margin-top: 0;
}

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--step--1);
  padding-block: var(--space-lg);
}

.site-footer p {
  margin: 0 0 var(--space-xs);
  max-width: none;
}

/* ---------- Scroll-reveal ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.in-view {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: var(--space-lg);
  bottom: var(--space-lg);
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-card);
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--color-primary-dark);
}

.icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

/* ---------- Print ---------- */
@media print {
  .skip-link,
  .site-nav,
  .back-to-top {
    display: none;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  main > section,
  main > aside {
    box-shadow: none;
    break-inside: avoid;
  }
}