/* --- Variables (light theme per design) --- */
:root {
  --font-sans: 'Roboto Mono', ui-monospace, monospace;
  --container-max: 1100px;
  --padding-x: clamp(1rem, 5vw, 2rem);
  --section-padding: clamp(3rem, 8vw, 5rem);
  --color-bg-fallback: #fafafa;
  --color-text: #1a1a1a;
  --color-text-muted: #666;
  --color-accent: #2563eb;
  --color-card-bg: #fff;
  --color-card-border: #e5e7eb;
  --transition-duration: 0.4s;
  --transition-ease: ease-out;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2vw, 1.0625rem);
  line-height: 1.5;
  color: var(--color-text);
  background-color: #ffffff;
  background-image: linear-gradient(#e3e3e3 1px, transparent 1px), linear-gradient(to right, #e3e3e3 1px, #ffffff 1px);
  background-size: 20px 20px;
  min-height: 100vh;
  overflow-x: hidden;
  max-width: 100vw;
}

/* --- Vanta container (full-viewport behind content) --- */
#vanta-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-color: #ffffff;
  opacity: 0.8;
  background-image: linear-gradient(#f0f0f0 1px, transparent 1px), linear-gradient(to right, #f0f0f0 1px, #ffffff 1px);
  background-size: 20px 20px;
}

/* --- Centered wrapper --- */
.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 100vw;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--padding-x);
  padding-right: var(--padding-x);
  min-width: 0;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding-top: 1rem;
  padding-bottom: 1rem;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-card-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
}

.site-logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition-duration) var(--transition-ease);
  min-width: 0;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.site-logo:hover,
.site-logo:focus-visible {
  opacity: 0.85;
}

.site-logo:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  min-height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  border-radius: 8px;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(0, 0, 0, 0.06);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  border-radius: 8px;
  transition: color var(--transition-duration) var(--transition-ease),
    background var(--transition-duration) var(--transition-ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.05);
}

.btn-contact {
  background: rgba(0, 0, 0, 0.06);
  color: var(--color-text);
  border-radius: 8px;
}

.btn-contact:hover,
.btn-contact:focus-visible {
  background: rgba(0, 0, 0, 0.1);
}

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

/* Desktop: hide drawer, show direct Projects link */
.nav-link-cta {
  display: inline-flex;
}

/* --- Hero --- */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

.hero-inner {
  text-align: center;
  min-width: 0;
  max-width: 100%;
}

.hero-title {
  margin: 0 0 0.5rem;
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-tagline {
  margin: 0;
  font-size: clamp(1.125rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 28ch;
  margin-left: auto;
  margin-right: auto;
}

/* Hero reveal (page load) */
.hero .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--transition-ease), transform 0.5s var(--transition-ease);
}

.hero .reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.hero-title.reveal { transition-delay: 0s; }
.hero-tagline.reveal { transition-delay: 0.1s; }

/* --- Projects section --- */
.projects-section {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

.projects-section .container {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--transition-ease), transform 0.5s var(--transition-ease);
}

.projects-section.visible .container {
  opacity: 1;
  transform: translateY(0);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

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

.project-card-title {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
}

.project-card-desc {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card-links {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.project-card-links a,
.project-card-open {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  min-height: 44px;
  padding: 0.5rem 0;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition-duration) var(--transition-ease);
}

.project-card-links a:hover,
.project-card-links a:focus-visible {
  opacity: 0.85;
}

.project-card-links a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.project-card-links .lucide {
  width: 1.125rem;
  height: 1.125rem;
}

/* Card hover lift */
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

/* Card entrance (staggered when section visible) */
.project-card.animate-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s var(--transition-ease), transform 0.4s var(--transition-ease),
    box-shadow 0.25s var(--transition-ease);
}

.project-card.animate-in.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --- Footer --- */
.site-footer {
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--color-card-border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  min-width: 0;
}

.footer-text {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.footer-link {
  font-size: 0.9375rem;
  color: var(--color-accent);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-link:hover,
.footer-link:focus-visible {
  text-decoration: underline;
}

.footer-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* --- Mobile --- */
@media (max-width: 768px) {
  :root {
    --padding-x: 20px;
  }

  .nav-link-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: min(280px, calc(100vw - 40px));
    height: 100vh;
    padding: 4rem 20px 2rem;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    border-left: 1px solid var(--color-card-border);
    flex-direction: column;
    align-items: flex-start;
    transform: translateX(100%);
    transition: transform 0.3s var(--transition-ease);
    z-index: 20;
  }

  .nav-drawer.open {
    transform: translateX(0);
  }

  .nav-drawer .nav-link {
    padding: 0.75rem 0;
    font-size: 1.125rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    min-width: 0;
  }

  .project-card {
    min-width: 0;
    overflow-wrap: break-word;
  }

  .project-card-desc,
  .project-card-title {
    overflow-wrap: break-word;
    word-wrap: break-word;
  }

  .site-header .container,
  .projects-section .container,
  .site-footer .container {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 600px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .hero .reveal {
    opacity: 1;
    transform: none;
  }

  .hero .reveal.revealed {
    opacity: 1;
    transform: none;
  }

  .projects-section .container {
    opacity: 1;
    transform: none;
  }

  .projects-section.visible .container {
    opacity: 1;
    transform: none;
  }

  .project-card.animate-in {
    opacity: 1;
    transform: none;
  }

  .project-card.animate-in.revealed {
    opacity: 1;
    transform: none;
  }

  .project-card:hover {
    transform: none;
  }
}