/* About Me Page — Student Starter */

:root {
  --background: #030372;
  --background-strong: #020b40;
  --background-accent: #020a2d;
  --foreground: #e5e7eb;
  --card-surface: #081b4a;
  --card-nested: #111827;
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover: rgba(255, 255, 255, 0.08);
  --card-highlight: rgba(255, 255, 255, 0.08);
  --muted: #cbd5e1;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;
  --dot-color: rgba(255, 255, 255, 0.1);
  --fade-mid: rgb(255 255 255 / 0.08);
  --fade-strong: rgb(255 255 255 / 0.18);
  --accent-blue: #60a5fa;
  --accent-red: #0f172a;
  --accent-black: #020a2d;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --background: #000000;
    --foreground: #ffffff;
    --card-surface: #111111;
    --card-nested: #1a1a1a;
    --card-border: #2a2a2a;
    --card-hover: #222222;
    --card-highlight: rgba(255, 255, 255, 0.03);
    --muted: #888888;
    --text-secondary: #d4d4d8;
    --text-tertiary: #a1a1aa;
    --dot-color: rgba(255, 255, 255, 0.1);
    --fade-mid: rgb(0 0 0 / 0.25);
    --fade-strong: rgb(0 0 0 / 0.75);
  }
}

:root[data-theme="light"] {
  --background: #0e1d4e;
  --background-strong: #08173d;
  --background-accent: #020a2d;
  --foreground: #f8fafc;
  --card-surface: #0b1a3f;
  --card-nested: #111827;
  --card-border: rgba(255, 255, 255, 0.1);
  --card-hover: rgba(255, 255, 255, 0.1);
  --card-highlight: rgba(255, 255, 255, 0.08);
  --muted: #cbd5e1;
  --text-secondary: #e2e8f0;
  --text-tertiary: #94a3b8;
  --dot-color: rgba(255, 255, 255, 0.08);
  --fade-mid: rgb(255 255 255 / 0.08);
  --fade-strong: rgb(255 255 255 / 0.18);
  --accent-blue: #60a5fa;
  --accent-red: #0f172a;
  --accent-black: #020a2d;
}

:root[data-theme="dark"] {
  --background: #000000;
  --foreground: #ffffff;
  --card-surface: #081b4a;
  --card-nested: #111827;
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover: rgba(255, 255, 255, 0.08);
  --card-highlight: rgba(255, 255, 255, 0.08);
  --muted: #cbd5e1;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;
  --dot-color: rgba(255, 255, 255, 0.1);
  --fade-mid: rgb(255 255 255 / 0.08);
  --fade-strong: rgb(255 255 255 / 0.18);
  --accent-blue: #60a5fa;
  --accent-red: #0f172a;
  --accent-black: #020a2d;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
}

body {
  min-height: 100%;
  background: radial-gradient(circle at top left, rgba(29, 78, 216, 0.35), transparent 28%),
    linear-gradient(180deg, var(--background) 0%, var(--background-strong) 65%, var(--background-accent) 100%);
  color: var(--foreground);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.2s ease, color 0.2s ease;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Dot background */
.dot-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100dvh;
  pointer-events: none;
  background-color: var(--background);
  transition: background-color 0.2s ease;
}

.dot-background::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--dot-color) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(
    to bottom,
    #000 0%,
    #000 35%,
    rgb(0 0 0 / 0.45) 65%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to bottom,
    #000 0%,
    #000 35%,
    rgb(0 0 0 / 0.45) 65%,
    transparent 100%
  );
}

.dot-background::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 70%;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--fade-mid) 45%,
    var(--fade-strong) 75%,
    var(--background) 100%
  );
  mask-image: linear-gradient(to bottom, transparent, #000 55%);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 55%);
}

/* Theme toggle */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--card-border);
  border-radius: 9999px;
  background: var(--card-nested);
  color: var(--foreground);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.theme-toggle:hover {
  background: var(--card-hover);
}

.theme-toggle svg {
  width: 1rem;
  height: 1rem;
}

:root:not([data-theme="dark"]) .theme-toggle .icon-moon,
:root[data-theme="light"] .theme-toggle .icon-moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-moon,
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: none;
  }

  :root:not([data-theme]) .theme-toggle .icon-sun,
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: block;
  }
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

:root:not([data-theme="dark"]) .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

/* Layout */
.page {
  position: relative;
  z-index: 10;
  display: flex;
  min-height: 100vh;
  align-items: flex-start;
  justify-content: center;
  padding: 2.5rem 1rem;
}

@media (min-width: 640px) {
  .page {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
}

.container {
  width: 100%;
  max-width: 420px;
}

.hub-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.25rem;
  border: 1px solid var(--card-border);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(29, 78, 216, 0.08), rgba(2, 10, 45, 0.08)), var(--card-surface);
  box-shadow: 0 0 0 1px var(--card-highlight);
}

@media (min-width: 640px) {
  .hub-card {
    padding: 1.5rem;
  }
}

/* Hero */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.avatar {
  width: 5rem;
  height: 5rem;
  overflow: hidden;
  border: 1px solid var(--card-border);
  border-radius: 9999px;
}

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

.hero-text h1 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--accent-blue);
}

.hero-text .role,
.hero-text .bio {
  font-size: 0.875rem;
  color: var(--muted);
}

.section-heading h2 {
  color: var(--accent-red);
}

.info-item dt {
  color: var(--accent-black);
}

.hero-text .bio {
  max-width: 20rem;
  margin: 0.25rem auto 0;
}

/* Sections */
.section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.section-heading h2 {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
}

/* About Me */
.about-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  background: var(--card-nested);
}

.about-card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.about-card em {
  font-style: italic;
  color: var(--foreground);
}

/* Info grid */
.info-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.info-item {
  padding: 1rem;
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  background: var(--card-nested);
}

.info-item dt {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
}

.info-item dd {
  margin-top: 0.375rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.info-item dd em {
  font-style: italic;
  color: var(--foreground);
}

/* Footer */
.site-footer {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
}

.site-footer .tagline {
  margin-bottom: 0.5rem;
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}