/* ============================================================
 * Kunyu Wang — CV
 * 纸质档案风格（editorial dossier）：暖纸底色、衬线展示字体、
 * 细线分栏、等宽小标签。克制的强调色，无渐变、无卡片、无阴影堆砌。
 * ============================================================ */

/* ---------- 本地字体 ---------- */
@font-face {
  font-family: "Fraunces";
  src: url("../fonts/fraunces-var.woff2") format("woff2");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("../fonts/newsreader-var.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Newsreader";
  src: url("../fonts/newsreader-italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/plexmono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/plexmono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- 设计变量 ---------- */
:root {
  --paper:    #f6f3ec;
  --ink:      #191713;
  --muted:    #6f6a5e;
  --faint:    #9a948a;
  --hairline: rgba(25, 23, 19, 0.16);
  --accent:   #a53a2a;

  --serif-latin: "Fraunces", Georgia, "Times New Roman", serif;
  --text-latin:  "Newsreader", Georgia, "Times New Roman", serif;
  --mono:        "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --font-display: var(--serif-latin);
  --font-text:    var(--text-latin);
  --font-meta:    var(--mono);
}

/* 中日文按语言切换字体栈：标题用宋体/明朝，正文用黑体/哥特 */
html[lang="zh"] {
  --font-display: "Fraunces", "Source Han Serif SC", "Noto Serif CJK SC", "Noto Serif SC",
                  "Songti SC", "STSong", "SimSun", serif;
  --font-text:    "Newsreader", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                  "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
}
html[lang="ja"] {
  --font-display: "Fraunces", "Hiragino Mincho ProN", "Hiragino Mincho Pro",
                  "Yu Mincho", "YuMincho", "Noto Serif JP", "Noto Serif CJK JP", serif;
  --font-text:    "Newsreader", "Hiragino Kaku Gothic ProN", "Hiragino Sans",
                  "Yu Gothic", "YuGothic", "Meiryo", "Noto Sans JP", "Noto Sans CJK JP", sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: var(--paper); }

.wrap {
  max-width: 54rem;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--faint);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}
a:hover { color: var(--accent); text-decoration-color: var(--accent); }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 页眉 ---------- */
.site-head {
  padding-top: clamp(2.5rem, 7vh, 4.5rem);
  padding-bottom: clamp(1.75rem, 4vh, 2.75rem);
  border-bottom: 1px solid var(--hairline);
}

.head-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(2rem, 6vh, 3.5rem);
}

.kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--font-meta);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
html[lang="zh"] .kicker, html[lang="ja"] .kicker { letter-spacing: 0.35em; }
.kicker-dash { width: 1.75rem; height: 1px; background: var(--accent); display: inline-block; }

/* 语言切换：只有中文/英文两个入口，日语只能通过 /ja 后缀访问 */
.lang-switch {
  font-family: var(--font-meta);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.lang-switch a {
  color: var(--faint);
  text-decoration: none;
  padding: 0.15rem 0.1rem;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease;
}
.lang-switch a:hover { color: var(--ink); }
.lang-switch a.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
.lang-sep { color: var(--faint); margin-inline: 0.25rem; }

.name {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 560;
  font-size: clamp(2.5rem, 7vw, 3.9rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  font-optical-sizing: auto;
}
.name::after { content: "."; color: var(--accent); }

.tagline {
  margin: 0 0 1.6rem;
  max-width: 46ch;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.6;
}
html[lang="en"] .tagline { font-style: italic; }

.contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
}
.contacts li {
  font-family: var(--font-meta);
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
}
.contacts .c-label {
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}
html[lang="zh"] .contacts .c-label, html[lang="ja"] .contacts .c-label { letter-spacing: 0.2em; }
.contacts a { text-decoration: none; }
.contacts a:hover { text-decoration: underline; text-decoration-color: var(--accent); }

/* ---------- 板块 ---------- */
section.cv-section {
  padding-block: clamp(2.2rem, 5vh, 3.4rem);
  border-bottom: 1px solid var(--hairline);
}
section.cv-section:last-of-type { border-bottom: 0; }

.sec-title {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin: 0 0 2rem;
  font-family: var(--font-meta);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
html[lang="zh"] .sec-title, html[lang="ja"] .sec-title { letter-spacing: 0.35em; }
.sec-num { color: var(--accent); font-weight: 400; }
.sec-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--hairline);
  transform: translateY(-0.18em);
}

/* ---------- 条目：左日期、右内容 ---------- */
.entry {
  display: grid;
  grid-template-columns: 9.25rem 1fr;
  gap: 0.5rem 2.25rem;
  padding-bottom: 2.1rem;
}
.entry:last-child { padding-bottom: 0.35rem; }

.entry-date {
  font-family: var(--font-meta);
  font-size: 0.74rem;
  line-height: 1.9;
  color: var(--muted);
  white-space: nowrap;
  padding-top: 0.18rem;
}

.entry-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}
.entry-heading {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.14rem;
  line-height: 1.4;
  letter-spacing: 0;
}
.entry-aside {
  font-family: var(--font-meta);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--faint);
  text-align: right;
  white-space: nowrap;
}
.entry-aside:empty { display: none; }

.entry-sub {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}
html[lang="en"] .entry-sub { font-style: italic; }
.entry-sub:empty { display: none; }

.entry-link {
  display: inline-block;
  margin-top: 0.45rem;
  font-family: var(--font-meta);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--muted);
}
.entry-link::after { content: " ↗"; color: var(--accent); }
.entry-link:hover { color: var(--accent); }

ul.details {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}
ul.details li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.55rem;
  font-size: 0.97rem;
  line-height: 1.72;
}
ul.details li:last-child { margin-bottom: 0; }
ul.details li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-family: var(--font-meta);
  font-size: 0.8em;
  line-height: 2;
}

/* ---------- 列表型板块（技能） ---------- */
.list-rows { border-top: 1px solid var(--hairline); }
.list-row {
  display: grid;
  grid-template-columns: 9.25rem 1fr;
  gap: 0.35rem 2.25rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--hairline);
}
.list-label {
  font-family: var(--font-meta);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.25rem;
}
html[lang="zh"] .list-label, html[lang="ja"] .list-label { letter-spacing: 0.24em; }
.list-value { margin: 0; font-size: 0.97rem; line-height: 1.7; }

/* ---------- 页脚 ---------- */
.site-foot { padding: 2.5rem 0 3rem; }
.foot-inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-family: var(--font-meta);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--faint);
}

/* ---------- 入场动效（克制） ---------- */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity 480ms ease, transform 480ms ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .entry, .list-row { grid-template-columns: 1fr; gap: 0.15rem 0; }
  .entry-date { padding-top: 0; line-height: 1.6; }
  .entry-aside { text-align: left; }
  .entry-head { flex-direction: column; gap: 0.15rem; }
  .contacts { gap: 0.3rem 1.1rem; }
}

/* ---------- 打印 ---------- */
@media print {
  body { background: #fff; font-size: 10.5pt; }
  .lang-switch { display: none; }
  .wrap { max-width: none; padding-inline: 0; }
  .site-head { padding-top: 0; }
  .reveal { opacity: 1; transform: none; }
  .entry, .list-row { break-inside: avoid; }
  a { text-decoration: none; }
}