@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap');

:root {
  --background: #f7f7f9;
  --on-background: #1c1c1e;
  --surface: #ffffff;
  --on-surface: #1c1c1e;
  --border: #e5e5ea;
  --primary: #4a80ff;
  --on-primary: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.08);

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Base: 1rem, Ratio: 1.25 (Major Third) */
  --font-size-xxs: 0.694rem;
  --font-size-xs:  0.833rem;
  --font-size-sm:  1rem;
  --font-size-md:  1.2rem;
  --font-size-lg:  1.44rem;
  --font-size-xl:  1.728rem;
  --font-size-xxl: 2.074rem;

  --border-radius: 4px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #111111;
    --on-background: #ffffff;
    --surface: #1c1c1e;
    --on-surface: #f2f2f7;
    --border: #2c2c2e;
    --primary: #5b8cff;
    --on-primary: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.6);
  }
}

html {
  scroll-behavior: smooth;
  overflow-y: scroll;
  min-height: 100%;
}

h3 {
  font-size: var(--font-size-md);
}

hr {
  border-color: var(--surface);
}

body {
  font-family: "Inter", sans-serif;
  font-weight: 300;
  background-color: var(--background);
  color: var(--on-surface);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  font-size: var(--font-size-sm);
  min-height: 100%;
  display: flex;
}

li {
  list-style-type: "-  ";
}

.main-content {
  margin-left: 17rem;
  width: 95%;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

.main-content > :last-child {
  margin-bottom: var(--spacing-xl);
}

.section-hero {
  width: 95%;
}

.section-column {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.section-nav {
  position: fixed;
  display: flex;
  flex-direction: column;
  z-index: 100;
  background-color: var(--surface);
  height: 100vh;
  width: 17rem;
  align-items: center;
}

.section-nav img {
  width: 100%;
  height: 200px;
  position: fixed;
  top: var(--spacing-md);
  object-fit: contain;
  object-position: center;
  border-radius: 500px;
  -webkit-transform: scale(1, 1);
  -moz-transform: scale(-1, -1);
  -o-transform: scale(-1, -1);
  transform: scale(-1, 1);
}

.main-content hr {
  width: 95%;
}

.main-content p {
  font-size: var(--font-size-sm);
}

#hero {
  font-size: var(--font-size-xl);
}

.nav-links {
  list-style: none;
  margin-top: calc(200px + var(--spacing-md) + var(--spacing-lg));
  padding: var(--spacing-md) var(--spacing-md) 0;
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  border-top: 1px solid var(--border);
}

.nav-links li {
  list-style: none;
}

.nav-links li a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--on-surface);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: background-color 0.15s, color 0.15s;
}

.nav-links li a:hover {
  background-color: var(--background);
  color: var(--primary);
}

.project-item {
  margin-bottom: var(--spacing-sm);
}

.project-title {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
}

.project-title h4 {
  margin: 0;
}

.project-tech {
  font-size: var(--font-size-xs);
  opacity: 0.5;
}

.project-item p {
  margin: 0.25rem 0 0;
}

#footer {
  position: absolute;
  bottom: var(--spacing-sm);
  left: 0;
  right: 0;
  text-align: center;
  font-size: var(--font-size-xxs);
  line-height: 1;
  font-style: bold;
}

/* Tablet */
@media (max-width: 900px) {
  .section-nav {
    width: 13rem;
  }

  .section-nav img {
    height: 150px;
  }

  .nav-links {
    margin-top: calc(150px + var(--spacing-md) + var(--spacing-lg));
  }

  .main-content {
    margin-left: 13rem;
  }

  .section-column {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  #hero {
    font-size: var(--font-size-lg);
  }
}

/* Mobile */
@media (max-width: 600px) {
  body {
    flex-direction: column;
  }

  .section-nav {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    box-sizing: border-box;
    border-bottom: 1px solid var(--border);
  }

  .section-nav img {
    display: none;
  }

  .nav-links {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 0;
    border-top: none;
    padding: 0;
    width: auto;
    gap: 0;
  }

  .nav-links li a {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs);
  }

  #footer {
    display: none;
  }

  .main-content {
    margin-left: 0;
    width: 100%;
    box-sizing: border-box;
    padding: var(--spacing-sm);
  }

  .section-hero {
    width: 100%;
  }

  .main-content hr {
    width: 100%;
  }

  #hero {
    font-size: var(--font-size-md);
    flex-direction: column;
    gap: 0;
  }
}

.quote-card blockquote {
  margin: 0;
  padding-left: var(--spacing-md);
  font-style: italic;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--on-surface);
}

.quote-card .quote-attribution {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-md);
  font-size: var(--font-size-xs);
  color: var(--on-surface);
  font-style: italic;
  opacity: 0.6;
}