/* ---------------------------------------------
   Reset & base
--------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f7f5;
  --color-text: #1a1a1a;
  --color-text-muted: #5c5c5c;
  --color-border: #e6e6e3;
  --color-accent: #2f6f4f;
  --color-accent-contrast: #ffffff;

  --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --max-width: 1080px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 5rem;

  --radius: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 var(--space-2);
  font-weight: 700;
}

p {
  margin: 0 0 var(--space-2);
  color: var(--color-text-muted);
}

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

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: var(--space-1) var(--space-2);
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

/* ---------------------------------------------
   Header
--------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.nav {
  position: relative;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-menu {
  position: absolute;
  top: calc(100% + 1px);
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 180px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);

  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.nav-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-menu a {
  display: block;
  padding: var(--space-1) var(--space-2);
  border-radius: 6px;
  font-weight: 500;
  color: var(--color-text);
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: var(--color-bg-alt);
  color: var(--color-accent);
}

@media (min-width: 720px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    flex-direction: row;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    gap: var(--space-4);
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-menu a {
    padding: 0;
  }

  .nav-menu a:hover,
  .nav-menu a:focus-visible {
    background: none;
  }
}

/* ---------------------------------------------
   Hero
--------------------------------------------- */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  text-align: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-2);
}

.hero-role {
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 46ch;
  margin: 0 auto var(--space-4);
}

.hero-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------------------------------------------
   Buttons
--------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background: #275c41;
}

.btn-outline {
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------------------------------------------
   Sections
--------------------------------------------- */
.section {
  padding: var(--space-6) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.section-lead {
  max-width: 65ch;
  font-size: 1.05rem;
}

/* ---------------------------------------------
   Skills
--------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.skill-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.skill-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.skill-card h3 {
  font-size: 1.05rem;
  margin-bottom: var(--space-1);
}

.skill-card p {
  margin: 0;
  font-size: 0.92rem;
}

/* ---------------------------------------------
   Projects
--------------------------------------------- */
.project-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-top: var(--space-4);
}

.project-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  background: rgba(47, 111, 79, 0.1);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}

.project-card h3 {
  font-size: 1.3rem;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-3);
}

.project-stack li {
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
}

/* ---------------------------------------------
   Gallery
--------------------------------------------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.gallery-item {
  margin: 0;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-item.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(
    45deg,
    var(--color-border),
    var(--color-border) 10px,
    var(--color-bg) 10px,
    var(--color-bg) 20px
  );
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px dashed var(--color-border);
}

.gallery-hint {
  margin-top: var(--space-2);
  font-size: 0.85rem;
}

.gallery-hint code {
  background: var(--color-border);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
}

/* ---------------------------------------------
   Contact
--------------------------------------------- */
.contact-links {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-3);
}

.contact-link {
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-weight: 600;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

/* ---------------------------------------------
   Footer
--------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.85rem;
}