/* Portfolio — readable, calm typography, soft contrast */

:root {
  --bg: #f7f5f2;
  --bg-elevated: #ffffff;
  --text: #1c1917;
  --text-muted: #57534e;
  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-soft: rgba(13, 148, 136, 0.12);
  --border: rgba(28, 25, 23, 0.08);
  --shadow: 0 1px 2px rgba(28, 25, 23, 0.04), 0 8px 24px rgba(28, 25, 23, 0.06);
  --radius: 12px;
  --radius-lg: 20px;
  --font-sans: "Outfit", system-ui, sans-serif;
  --font-display: "Outfit", system-ui, sans-serif;
  --space-section: clamp(4rem, 10vw, 7rem);
  --max-readable: 65ch;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--text);
  color: var(--bg);
  border-radius: 6px;
  z-index: 1000;
  font-weight: 500;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(1100px, 100% - 2rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 245, 242, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 8px;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav-toggle-bar {
  display: block;
  width: 1.375rem;
  height: 2px;
  margin-inline: auto;
  background: var(--text);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--accent);
}

.nav-list a:focus-visible {
  outline: none;
  border-bottom-color: var(--accent);
}

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .site-nav.is-open {
    max-height: 280px;
  }

  .nav-list {
    flex-direction: column;
    padding: 1rem 1.5rem 1.25rem;
    gap: 0;
  }

  .nav-list a {
    display: block;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }
}

/* Hero */
.hero {
  position: relative;
  padding: clamp(3.5rem, 12vw, 6rem) 0 var(--space-section);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 55% at 50% -20%, rgba(13, 148, 136, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(13, 148, 136, 0.06), transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 40rem;
}

.hero-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.hero-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
}

.hero-subtitle {
  margin: 0 0 2rem;
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: var(--max-readable);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.35);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-elevated);
  border-color: rgba(28, 25, 23, 0.15);
}

.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

.section-header {
  margin-bottom: clamp(2rem, 5vw, 3rem);
  max-width: 36rem;
}

.section-header--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  max-width: 32rem;
}

.section-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.125rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.65;
}

/* About */
.about {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.about-grid {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.about-text p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  max-width: var(--max-readable);
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-highlights {
  list-style: none;
  margin: 0;
  padding: 1.5rem;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.about-highlights li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.about-highlights li:first-child {
  padding-top: 0;
}

.about-highlights li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.highlight-icon {
  color: var(--accent);
  font-size: 0.65rem;
  line-height: 1.8;
  flex-shrink: 0;
}

.about-highlights strong {
  color: var(--text);
  font-weight: 600;
}

/* Projects */
.project-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.project-card:hover {
  box-shadow: var(--shadow);
  border-color: rgba(13, 148, 136, 0.2);
  transform: translateY(-2px);
}

.project-card-visual {
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.25rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent-soft), rgba(13, 148, 136, 0.25));
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card-visual--b {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(99, 102, 241, 0.28));
  color: #4f46e5;
}

.project-card-visual--c {
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.12), rgba(217, 119, 6, 0.22));
  color: #c2410c;
}

.project-card-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.project-card-desc {
  margin: 0 0 1.25rem;
  flex: 1;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.project-card-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--accent);
  text-decoration: none;
  align-self: flex-start;
}

.project-card-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Contact */
.contact-inner {
  text-align: center;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.contact-chip {
  display: inline-flex;
  padding: 0.65rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.contact-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.contact-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Footer */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.footer-inner {
  text-align: center;
}

.footer-copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}