:root {
  color-scheme: light;
  --ink: #18202a;
  --muted: #5f6b7a;
  --line: #dde4ec;
  --paper: #f7f2ea;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --warm: #b45309;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 20px;
  padding: 18px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(24, 32, 42, 0.12);
  background: rgba(247, 242, 234, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

nav a {
  text-decoration: none;
}

button,
.primary,
.secondary {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  font: inherit;
  text-decoration: none;
}

.icon-button {
  width: 44px;
  background: var(--panel);
  border-color: var(--line);
  color: var(--muted);
}

main {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 80px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  padding: 56px 0 76px;
}

.hero-copy h1 {
  margin: 8px 0 10px;
  max-width: 820px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-role {
  margin: 0 0 18px;
  color: var(--accent-dark);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
}

.summary {
  max-width: 700px;
  color: var(--muted);
  font-size: 18px;
}

.role-line {
  margin-bottom: 10px;
  color: var(--ink);
  font-weight: 700;
}

.tech-line {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 15px;
}

.eyebrow,
.meta {
  margin: 0;
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  font-weight: 800;
}

.primary {
  background: var(--accent);
  color: white;
}

.primary:hover {
  background: var(--accent-dark);
}

.secondary {
  border-color: var(--line);
  background: var(--panel);
}

.profile-panel,
.timeline article,
.cards article,
.skill-groups article,
.education-block article,
.login-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(24, 32, 42, 0.08);
}

.profile-panel {
  display: grid;
  gap: 18px;
  padding: 24px;
}

.profile-panel span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.profile-panel strong {
  display: block;
  margin-top: 4px;
}

.section-grid {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 40px;
  padding: 62px 0;
  border-top: 1px solid rgba(24, 32, 42, 0.14);
}

h2,
h3,
p {
  margin-top: 0;
}

h2 {
  font-size: 30px;
}

.timeline,
.cards,
.skill-groups {
  display: grid;
  gap: 16px;
}

.skill-groups {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.timeline article,
.cards article,
.skill-groups article {
  padding: 22px;
}

.timeline p,
.cards p,
.skill-groups p {
  margin-bottom: 0;
  color: var(--muted);
}

.timeline ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.timeline li + li {
  margin-top: 8px;
}

.education-block article {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
}

.education-block h3,
.education-block p {
  margin-bottom: 4px;
}

.education-block p,
.education-block span {
  color: var(--muted);
}

.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.contact-list a {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  text-decoration: none;
}

.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-shell {
  width: min(440px, 100%);
  margin: 0;
}

.login-card {
  padding: 30px;
}

.login-card h1 {
  margin: 8px 0 10px;
  font-size: 32px;
  line-height: 1.2;
}

label {
  display: block;
  margin: 22px 0 8px;
  color: var(--muted);
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

.login-card button {
  width: 100%;
  margin-top: 14px;
}

.form-message {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--warm);
}

@media (max-width: 860px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  nav {
    display: none;
  }

  .hero,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .profile-panel {
    width: 100%;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .skill-groups {
    grid-template-columns: 1fr;
  }

  .education-block article {
    display: grid;
  }
}