/* ============================================================
   个人主页 · 全局样式
   明暗主题 · 响应式 · 滚动动画（零依赖）
   ============================================================ */

:root {
  --bg: #f7f8fc;
  --bg-soft: #ffffff;
  --bg-deep: #eef1f8;
  --text: #1b2130;
  --text-soft: #5b6472;
  --accent: #4f61e0;
  --accent-strong: #3b4bc4;
  --accent-soft: rgba(79, 97, 224, 0.12);
  --border: rgba(27, 33, 48, 0.1);
  --shadow: 0 10px 30px rgba(27, 33, 48, 0.08);
  --shadow-lg: 0 20px 50px rgba(27, 33, 48, 0.14);
  --radius: 18px;
  --radius-sm: 12px;
  --header-h: 68px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

[data-theme="dark"] {
  --bg: #0f1420;
  --bg-soft: #171e2e;
  --bg-deep: #121828;
  --text: #eef1f8;
  --text-soft: #a3adbd;
  --accent: #7c8cff;
  --accent-strong: #9aa7ff;
  --accent-soft: rgba(124, 140, 255, 0.16);
  --border: rgba(238, 241, 248, 0.12);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

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

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

h1, h2, h3 {
  line-height: 1.3;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p { margin: 0 0 1em; color: var(--text-soft); }

.container {
  width: min(1080px, 92%);
  margin-inline: auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease,
    color 0.2s ease, border-color 0.2s ease;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 20px rgba(79, 97, 224, 0.35);
}
.btn--primary:hover {
  background: var(--accent-strong);
  color: #fff;
  transform: translateY(-2px);
}
.btn--ghost {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
/* ---------- 导航栏 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  height: var(--header-h);
  z-index: 100;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}
.nav__brand:hover { color: var(--accent); }
.nav__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--accent-soft);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  position: relative;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
  padding: 4px 0;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}
.nav__links a:hover,
.nav__links a.is-active { color: var(--text); }
.nav__links a:hover::after,
.nav__links a.is-active::after { width: 100%; }

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: transparent;
  cursor: pointer;
  font-size: 16px;
  display: grid;
  place-items: center;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.theme-toggle:hover {
  border-color: var(--accent);
  transform: rotate(15deg);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav__toggle span {
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 90px;
  overflow: hidden;
  background:
    radial-gradient(60% 50% at 85% 15%, var(--accent-soft), transparent 70%),
    radial-gradient(50% 45% at 10% 85%, var(--accent-soft), transparent 70%),
    var(--bg);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero__hi {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 2px;
  font-size: 14px;
  margin-bottom: 8px;
}

.hero__name {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  letter-spacing: -0.5px;
  margin-bottom: 10px;
  background: linear-gradient(120deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__title {
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 18px;
}

.hero__desc {
  font-size: 17px;
  max-width: 52ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
}

.hero__card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: rotate(1.5deg);
  transition: transform 0.35s ease;
}
.hero__card:hover { transform: rotate(0deg) translateY(-6px); }

.hero__photo {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--bg-deep);
}

.hero__card-body { padding: 22px 24px 26px; }

.hero__card-quote {
  font-size: 15px;
  font-style: italic;
  color: var(--text);
  border-left: 3px solid var(--accent);
  padding-left: 12px;
}

.hero__stats {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  text-align: center;
}
.hero__stats strong {
  display: block;
  font-size: 22px;
  color: var(--accent);
}
.hero__stats span {
  font-size: 12.5px;
  color: var(--text-soft);
}
/* ---------- 通用区块 ---------- */
.section { padding: 92px 0; }
.section--alt { background: var(--bg-deep); }

.section__head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px;
}
.section__head h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.3rem);
  letter-spacing: -0.3px;
}
.section__head p {
  font-size: 16px;
  margin: 0;
}

/* ---------- 标签 ---------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
.tag {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.tag--soft {
  background: var(--bg-deep);
  color: var(--text-soft);
  border: 1px solid var(--border);
}

/* ---------- 关于我 ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}
.about__text p { font-size: 16.5px; }

.about__skills {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  box-shadow: var(--shadow);
}
.about__skills h3 {
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-soft);
  margin-bottom: 14px;
}
/* ---------- 项目与成果 ---------- */
.projects__filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}
.chip {
  padding: 8px 20px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}
.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.chip.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.card.is-hidden { display: none; }

.card__cover {
  height: 168px;
  background: linear-gradient(135deg, var(--accent), #8a63d2);
}
.card__cover--2 { background: linear-gradient(135deg, #2f9e6f, #4fc3a1); }
.card__cover--3 { background: linear-gradient(135deg, #d2694f, #e8a04f); }
.card__cover--4 { background: linear-gradient(135deg, #4f7dd2, #63b6e0); }
.card__cover--5 { background: linear-gradient(135deg, #b24fd2, #e063b6); }
.card__cover--6 { background: linear-gradient(135deg, #5b6472, #8a94a6); }

.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 24px 24px;
}
.card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-soft);
  font-size: 13px;
  margin-bottom: 10px;
}
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p {
  font-size: 14.5px;
  flex: 1;
}
.card .tags { margin-bottom: 16px; }

.card__links {
  display: flex;
  gap: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.card__links a {
  font-size: 14px;
  font-weight: 600;
}

.badge {
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge--research { background: var(--accent-soft); color: var(--accent-strong); }
.badge--dev { background: rgba(47, 158, 111, 0.14); color: #2f9e6f; }
.badge--other { background: rgba(210, 105, 79, 0.14); color: #d2694f; }
[data-theme="dark"] .badge--dev { color: #6fd6a6; }
[data-theme="dark"] .badge--other { color: #f0a184; }
/* ---------- 经历时间线 ---------- */
.timeline {
  list-style: none;
  margin: 0 auto;
  padding: 0 0 0 6px;
  max-width: 760px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  padding: 0 0 38px 42px;
}
.timeline__item:last-child { padding-bottom: 0; }

.timeline__marker {
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
}

.timeline__content {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}
.timeline__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}
.timeline__head h3 { font-size: 17.5px; margin: 0; }
.timeline__date {
  font-size: 13px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  padding: 3px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.timeline__org {
  font-size: 14px;
  color: var(--text-soft);
  margin: 6px 0 8px;
  font-weight: 500;
}
.timeline__content p:last-child { margin: 0; font-size: 14.5px; }

/* ---------- 兴趣 ---------- */
.interests__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.interest {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}
.interest:hover { transform: translateY(-5px); }
.interest__icon {
  font-size: 34px;
  margin-bottom: 12px;
}
.interest h3 { font-size: 17px; }
.interest p { font-size: 14px; margin: 0; }

/* ---------- 合作 ---------- */
.collab__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.collab__item {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 28px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.collab__item:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
}
.collab__num {
  font-size: 30px;
  font-weight: 800;
  color: var(--accent-soft);
  -webkit-text-stroke: 1.5px var(--accent);
  margin-bottom: 12px;
}
.collab__item h3 { font-size: 18px; }
.collab__item p { font-size: 14.5px; margin: 0; }

.collab__cta {
  margin-top: 48px;
  text-align: center;
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 36px 24px;
}
.collab__cta p {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
}
/* ---------- 联系 ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}
.contact__list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.contact__icon { font-size: 22px; }
.contact__list strong {
  display: block;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-soft);
}
.contact__list a,
.contact__list span {
  font-size: 15.5px;
  color: var(--text);
  word-break: break-all;
}
.contact__list a:hover { color: var(--accent); }

.contact__form {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 32px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
}
.form__row { display: grid; gap: 8px; }
.form__row label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-soft);
}
.form__row input,
.form__row textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: vertical;
}
.form__row input:focus,
.form__row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form__note {
  margin: 0;
  font-size: 13.5px;
  color: var(--accent-strong);
}

/* ---------- 联系 · 二维码（网站 / GitHub） ---------- */
.contact__qr {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.qr-card {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.contact__qr img {
  width: 140px;
  height: 140px;
  background: #ffffff;
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.qr-card figcaption {
  font-size: 13px;
  color: var(--text-soft);
  text-align: center;
}

/* ---------- 论文成果 ---------- */
.pubs__list {
  display: grid;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
}
.pub {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.pub:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}
.pub--featured {
  border: 1.5px solid var(--accent);
  background: linear-gradient(135deg, var(--bg-soft), var(--accent-soft));
}
.pub__year {
  min-width: 52px;
  font-weight: 700;
  font-size: 15px;
  color: var(--accent-strong);
  padding-top: 3px;
}
.pub__body { flex: 1; min-width: 0; }
.pub__tags {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.pub__title {
  font-size: 17px;
  line-height: 1.5;
  margin: 4px 0 8px;
}
.pub__title a { color: var(--text); }
.pub__title a:hover { color: var(--accent); }
.pub__authors {
  font-size: 14px;
  margin: 4px 0;
  color: var(--text-soft);
}
.pub__authors strong {
  color: var(--accent-strong);
  font-weight: 700;
}
.pub__venue {
  font-size: 13.5px;
  margin: 4px 0 10px;
  font-style: italic;
}
.pub__links {
  display: flex;
  gap: 16px;
}
.pub__links a {
  font-size: 13.5px;
  font-weight: 600;
}
.pub__cites {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  align-self: center;
}
.pub__cites strong {
  font-size: 20px;
  color: var(--accent-strong);
}
.pub__cites span {
  font-size: 11.5px;
  color: var(--text-soft);
}
.pubs__more {
  text-align: center;
  margin-top: 36px;
}
@media (max-width: 720px) {
  .pub { flex-wrap: wrap; }
  .pub__cites {
    flex-direction: row;
    align-items: baseline;
    gap: 6px;
    align-self: flex-start;
    padding: 6px 12px;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: var(--bg);
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer__inner p {
  margin: 0;
  font-size: 14px;
}
.footer__top { font-size: 14px; font-weight: 600; }

.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 0;
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 90;
}
.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover { background: var(--accent-strong); }

/* ---------- 语言切换 ---------- */
.nav__tools {
  display: flex;
  align-items: center;
  gap: 10px;
}
.lang-btn {
  padding: 7px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.lang-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- 时间线小标题 ---------- */
.timeline__sub {
  max-width: 760px;
  margin: 46px auto 24px;
  padding-left: 42px;
  font-size: 16px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent-strong);
}
ol.timeline + .timeline__sub { margin-top: 52px; }

/* ---------- 滚动出现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}
/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero__inner,
  .about__grid,
  .contact__grid { grid-template-columns: 1fr; }
  .hero__inner { gap: 44px; }
  .hero__card { max-width: 460px; margin-inline: auto; transform: none; }
  .hero__card:hover { transform: translateY(-6px); }
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .interests__grid { grid-template-columns: repeat(2, 1fr); }
  .collab__grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .section { padding: 68px 0; }
  .section__head { margin-bottom: 38px; }

  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 6% 22px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav__links li { border-bottom: 1px solid var(--border); }
  .nav__links li:last-child { border-bottom: 0; padding-top: 12px; }
  .nav__links a {
    display: block;
    padding: 14px 2px;
    font-size: 16px;
  }
  .nav__links a::after { display: none; }

  /* 汉堡按钮动画 */
  .nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero { padding: calc(var(--header-h) + 48px) 0 64px; }
  .hero__actions .btn { flex: 1; justify-content: center; }

  .projects__grid { grid-template-columns: 1fr; }
  .contact__form { padding: 24px 22px; }
  .footer__inner { justify-content: center; text-align: center; }
  .to-top { right: 16px; bottom: 16px; }
}

@media (max-width: 420px) {
  .interests__grid { grid-template-columns: 1fr; }
  .hero__stats strong { font-size: 19px; }
}