/* ==========================================================================
   大宋 dasong.online — 基础与重置
   ========================================================================== */

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
}

a {
  color: var(--color-link, var(--color-primary));
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
a:hover {
  color: var(--color-primary-strong);
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-primary-strong);
}

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--color-border-strong); border-radius: var(--radius-pill); }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-soft); }
::-webkit-scrollbar-track { background: transparent; }

/* 页面级布局 */
.container {
  width: min(var(--container), 100% - 2.5rem);
  margin-inline: auto;
}

.page {
  padding-top: calc(var(--nav-h) + 2rem);
  padding-bottom: 4rem;
  min-height: 100vh;
}

/* 键盘焦点可见性 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}