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

:root {
  --black: #111111;
  --white: #ffffff;
  --orange: #f26b21;
  --gray: #6b6b6b;
  --light-gray: #f4f4f2;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

section {
  padding: 0 5vw;
}

/* ---------- Header ---------- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 5vw;
  font-size: 0.85rem;
  font-weight: bold;
  letter-spacing: 0.08em;
}

header.brand {
  border-bottom: none;
}

header.site-nav a {
  color: var(--black);
}

/* ---------- Hero ---------- */
.hero {
  padding-top: 4rem;
  padding-bottom: 5rem;
}

.hero-inner {
  display: flex;
  gap: 4rem;
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-text {
  flex: 1;
}

.kicker {
  color: var(--orange);
  font-weight: bold;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  margin-bottom: 2rem;
  max-width: 12ch;
}

.hero-columns {
  display: flex;
  gap: 2.5rem;
}

.hero-columns p {
  font-size: 1rem;
  color: var(--black);
  max-width: 38ch;
}

.hero-photo {
  flex-shrink: 0;
}

.hero-photo img {
  display: block;
  width: min(320px, 30vw);
  height: auto;
  background: var(--light-gray);
  border-left: 8px solid var(--orange);
  padding: 0.5rem 0 0.5rem 0.5rem;
}

/* ---------- Principles ---------- */
.principles {
  display: flex;
  gap: 2rem;
  padding-top: 3rem;
  padding-bottom: 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.principle {
  flex: 1;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.principle-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  font-weight: bold;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.principle p {
  font-size: 0.95rem;
  padding-top: 0.4rem;
}

/* ---------- Connect banner ---------- */
.connect-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--orange);
  color: var(--white);
  padding: 2rem 5vw;
}

.connect-title {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: bold;
  letter-spacing: 0.05em;
}

.connect-link {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: bold;
  letter-spacing: 0.05em;
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

/* ---------- Section labels ---------- */
.section-label {
  font-size: 0.75rem;
  font-weight: bold;
  letter-spacing: 0.15em;
  color: var(--gray);
  margin-bottom: 0.5rem;
}

.section-sub {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--gray);
  margin-bottom: 1.5rem;
}

section h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.05;
  margin-bottom: 2.5rem;
}

/* ---------- Writing ---------- */
.writing {
  padding-top: 4rem;
  padding-bottom: 4rem;
  background: var(--light-gray);
}

.article-list {
  list-style: none;
  max-width: 1000px;
}

.article-list li {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--black);
}

.article-list li:last-child {
  border-bottom: 1px solid var(--black);
}

.tag {
  color: var(--orange);
  font-weight: bold;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  min-width: 10rem;
}

.article-title {
  flex: 1;
  font-size: 1.1rem;
  font-weight: bold;
}

.read {
  font-weight: bold;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.read-all {
  margin-top: 2rem;
  font-weight: bold;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

/* ---------- Skills ---------- */
.skills {
  padding-top: 4rem;
  padding-bottom: 5rem;
}

.skills-group-title {
  font-size: 0.8rem;
  font-weight: bold;
  letter-spacing: 0.15em;
  color: var(--gray);
  margin: 2.5rem 0 1.5rem;
}

.skills h3.skills-group-title:first-of-type {
  margin-top: 0;
}

.core-skills {
  display: flex;
  gap: 3rem;
  max-width: 1200px;
}

.skill {
  flex: 1;
}

.skill h4 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.skill p {
  font-size: 0.95rem;
  color: var(--black);
}

.skill + .skill {
  border-left: 1px solid #d8d8d4;
  padding-left: 3rem;
}

.skill-pills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  max-width: 900px;
}

.skill-pills li {
  background: var(--black);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: bold;
  letter-spacing: 0.1em;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
}

/* ---------- Footer banner ---------- */
.footer-banner {
  margin: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner {
    flex-direction: column-reverse;
  }

  .hero-columns {
    flex-direction: column;
  }

  .principles {
    flex-direction: column;
  }

  .core-skills {
    flex-direction: column;
  }

  .skill + .skill {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid #d8d8d4;
    padding-top: 1.5rem;
  }

  .article-list li {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .article-title {
    flex-basis: 100%;
    order: 3;
  }
}