:root {
  --navy: #0f2744;
  --sand: #f5f1ea;
  --teal: #2a9d8f;
  --teal-dark: #238276;
  --white: #ffffff;
  --text: #1a1a1a;
  --muted: #5c6670;
  --border: #e2ddd4;
  --shadow: 0 8px 24px rgba(15, 39, 68, 0.08);
  --radius: 12px;
  --max-width: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "DM Sans", system-ui, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

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

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

a:hover {
  color: var(--teal-dark);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
}

.logo {
  font-weight: 700;
  color: var(--navy);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--navy);
  font-weight: 500;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--navy);
  transition: transform 0.2s, opacity 0.2s;
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--sand) 0%, var(--white) 100%);
  padding: 5rem 0 4rem;
}

.hero-inner {
  max-width: 720px;
}

.eyebrow {
  color: var(--teal);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  color: var(--navy);
  margin: 0 0 1rem;
}

.hero-text {
  font-size: 1.125rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

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

.btn-primary:hover {
  background: var(--teal-dark);
  color: var(--white);
  transform: translateY(-1px);
}

/* Sections */
.section {
  padding: 4rem 0;
}

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

.section-title {
  color: var(--navy);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  margin: 0 0 0.75rem;
}

.section-intro {
  color: var(--muted);
  margin-bottom: 2rem;
}

/* Project cards */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(15, 39, 68, 0.12);
}

.placeholder-image {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #dce8ef, #c5d9e8);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-weight: 500;
}

.project-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
  display: block;
  background: var(--sand);
}

.project-body {
  padding: 1.25rem;
}

.project-status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.project-card h3 {
  margin: 0 0 0.5rem;
  color: var(--navy);
}

.project-card p {
  color: var(--muted);
  margin: 0 0 1rem;
  font-size: 0.95rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.tag-list li {
  background: var(--sand);
  color: var(--navy);
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

.project-links {
  display: flex;
  gap: 1rem;
  font-weight: 600;
}

.project-links a[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  align-items: start;
}

.about-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.about-card h3 {
  margin-top: 0;
  color: var(--navy);
}

.about-card ul {
  padding-left: 1.2rem;
  color: var(--muted);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.contact-email {
  margin-top: 1.5rem;
}

.contact-form {
  display: grid;
  gap: 0.75rem;
}

.contact-form label {
  font-weight: 500;
  color: var(--navy);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--teal);
  border-color: transparent;
}

.form-note {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 4rem;
    right: 1rem;
    left: 1rem;
    flex-direction: column;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    display: none;
  }

  .nav-links.is-open {
    display: flex;
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }
}