/* ===== Reset & Base Typography ===== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-link-hover);
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  outline: none;
}

/* ===== Typography ===== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

h4 {
  font-size: 1.1rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

p {
  margin-bottom: 1em;
}

/* Selection */
::selection {
  background: var(--color-accent);
  color: #ffffff;
}

/* Scrollbar — Webkit */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-ink-tertiary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-ink-secondary);
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}