/* ============================================================
   base.css  —  Layout and structure styles shared by all themes.
   Theme-specific colors (backgrounds, text, accents) live in
   static/css/themes/light.css and static/css/themes/dark.css.
   ============================================================ */

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

body {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
  border-radius: 6px;
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ----- Site header ----- */
.site-header {
  padding: 2rem 1.5rem 1rem;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
}

.header-name {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.header-tagline {
  font-size: 1.05rem;
  margin-top: 0.25rem;
  opacity: 0.8;
}

/* ----- Navigation ----- */
.site-nav {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 2rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-nav a {
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
}

.site-nav a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* ----- Main content area ----- */
.site-main {
  flex: 1;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ----- Generic section spacing ----- */
.section {
  margin-bottom: 3.5rem;
}

.section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid;
}

/* ----- About section ----- */
.about-layout {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 1.5rem;
  /* Photo shorter than text: keep natural image size (no cover stretch) and vertically center with the copy */
  align-items: center;
}

.about-photo {
  position: relative;
  width: 100%;
  max-width: 300px;
  border-radius: 16px;
  overflow: hidden;
  /* Subtle mat when the image is letterboxed (object-fit: contain) */
  background: rgba(127, 127, 127, 0.08);
}

.about-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 16px;
  box-shadow: inset 0 0 0 1px rgba(127, 127, 127, 0.22);
  pointer-events: none;
}

.about-photo-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  /* Natural proportions — no cover crop "zoom" */
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.12);
}

.about-text {
  font-size: 1.05rem;
}

.about-text p + p {
  margin-top: 1rem;
}

/* ----- Skills (About section) ----- */
.skills-block {
  margin-top: 0.25rem;
}

.skills-groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.85rem;
}

.skills-group {
  padding: 1.15rem 1.15rem;
  border-radius: 12px;
  border: 1px solid rgba(127, 127, 127, 0.34);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  height: 100%;
}

.skills-group:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.14);
  transform: translateY(-2px);
}

.skills-category {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.85;
  margin-bottom: 1.05rem;
}

.skills-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-content: flex-start;
  padding-bottom: 0.25rem;
}

.skill-chip {
  font-size: 0.82rem;
  padding: 0.22rem 0.65rem;
}

@media (min-width: 720px) {
  .skills-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: 1fr;
  }
}

/* ----- Project grid ----- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.75rem;
}

/* ----- Project card ----- */
.project-card {
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.14);
  transform: translateY(-2px);
}

.project-image-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.project-summary {
  font-size: 0.95rem;
  line-height: 1.55;
}

/* ----- Tech stack badges ----- */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-badge {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

/* ----- Collapsible project details ----- */
.project-details {
  font-size: 0.9rem;
}

.project-details summary {
  cursor: pointer;
  font-weight: 500;
  padding: 0.25rem 0;
  list-style: none;
}

.project-details summary::-webkit-details-marker {
  display: none;
}

.project-details summary::before {
  content: "▶  ";
  font-size: 0.7em;
}

details[open] summary::before {
  content: "▼  ";
}

.project-details summary:hover {
  text-decoration: none;
}

.project-details summary:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
  border-radius: 8px;
}

.detail-block {
  margin-top: 0.75rem;
}

.detail-block h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

/* ----- Project link buttons ----- */
.project-links {
  display: flex;
  gap: 0.75rem;
  padding-top: 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.45rem 1rem;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  opacity: 0.85;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* ----- Contact section ----- */
.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.98rem;
}

.contact-label {
  font-weight: 600;
  margin-right: 0.4rem;
}

/* ----- Footer ----- */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* ----- Responsive tweaks ----- */
@media (max-width: 640px) {
  .about-layout {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .about-photo {
    max-width: 300px;
    margin: 0 auto 0.25rem;
  }

  .about-photo-image {
    max-height: min(70vh, 480px);
    width: 100%;
    height: auto;
    object-fit: contain;
  }
}

@media (max-width: 500px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
  .header-name {
    font-size: 1.5rem;
  }
}