/* ── Custom Properties ─────────────────────────────────── */
:root {
  --color-navy:        #1b2d4f;
  --color-teal:        #0c7a6e;
  --color-teal-light:  #e0f2f0;
  --color-white:       #ffffff;
  --color-bg:          #f7f9f9;
  --color-text:        #1b2d4f;
  --color-text-muted:  #4a5568;
  --color-border:      #d1dde0;

  --font-family:       'Inter', sans-serif;
  --font-size-base:    16px;
  --line-height-base:  1.6;

  --max-width:         800px;
  --section-padding:   60px;
  --nav-height:        60px;
  --radius-pill:       999px;
  --radius-card:       8px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

ul {
  list-style: none;
}

a {
  color: var(--color-teal);
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* ── Layout Container ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ── Navigation ────────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

nav {
  height: var(--nav-height);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-navy);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-navy);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--color-teal);
}

/* ── Hero Section ──────────────────────────────────────── */
#hero {
  background-color: var(--color-white);
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.headshot {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 24px;
  border: 3px solid var(--color-teal-light);
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Section Base ──────────────────────────────────────── */
section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

section:nth-child(even) {
  background-color: var(--color-white);
}

h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

/* ── About ─────────────────────────────────────────────── */
#about p {
  color: var(--color-text);
  max-width: 680px;
}

/* ── Skills ────────────────────────────────────────────── */
.skills-group {
  margin-bottom: 20px;
}

.skills-group:last-child {
  margin-bottom: 0;
}

h3 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ── Badges (Pill Tags) ────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
}

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

.badge--secondary {
  background-color: var(--color-teal-light);
  color: var(--color-navy);
}

/* ── Projects ──────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.project-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  text-transform: none;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.project-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-teal);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.project-card p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.project-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ── Contact ───────────────────────────────────────────── */
#contact > .container > p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  max-width: 560px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-list a {
  font-weight: 600;
  color: var(--color-teal);
  text-decoration: none;
  transition: color 0.2s ease;
}

.contact-list a:hover {
  color: var(--color-navy);
  text-decoration: underline;
}

/* ── Footer ────────────────────────────────────────────── */
footer {
  background-color: var(--color-navy);
  padding: 24px 0;
  text-align: center;
}

footer p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

/* ── Responsive ────────────────────────────────────────── */
@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .nav-links {
    gap: 16px;
  }

  .nav-links a {
    font-size: 0.82rem;
  }

  h1 {
    font-size: 1.3rem;
  }

  .tagline {
    font-size: 0.95rem;
  }
}

@media (max-width: 360px) {
  .nav-inner {
    flex-direction: column;
    height: auto;
    padding-top: 10px;
    padding-bottom: 10px;
    gap: 8px;
  }

  nav {
    height: auto;
  }

  html {
    scroll-padding-top: 90px;
  }

  .nav-links {
    gap: 12px;
  }
}