/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --color-card-bg: #f9fafb;
  --color-card-hover: #f3f4f6;
  --color-tag-bg: #e0e7ff;
  --color-tag-text: #3730a3;
  --color-nav-bg: rgba(255, 255, 255, 0.85);
  --color-live-bg: #dcfce7;
  --color-live-text: #166534;

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 720px;
  --nav-height: 64px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

ul {
  list-style: none;
}

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

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: var(--nav-height);
}

.nav__logo {
  font-size: var(--font-size-base);
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover {
  opacity: 0.7;
}

/* ===== SECTIONS ===== */
section {
  padding: var(--space-3xl) 0;
}

.section-heading {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-xl);
  letter-spacing: -0.01em;
}

/* ===== BLOCK DOCUMENT ===== */
/* The homepage is a flat list of blocks rendered into #content. Vertical
   rhythm is driven by each block's top margin so the admin can reorder blocks
   freely; level-2 headings open a new section with generous space above. */
#content {
  position: relative;
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-4xl);
}

.block {
  margin: var(--space-lg) 0 0;
}

.block--portrait {
  margin: 0;
}

.block--heading-1 {
  margin-top: 0;
}

.block--heading-2 {
  margin-top: var(--space-4xl);
}

.block--list {
  margin-top: var(--space-md);
}

.block--grid {
  margin-top: var(--space-xl);
}

.block--image {
  margin-top: var(--space-xl);
}

/* Uploaded image block: fits the content column, gentle rounding. */
.image-block__img {
  width: 100%;
  height: auto;
  border-radius: 12px;
}

/* Prose block: muted, larger body text (reuses the old hero/about look). */
.richtext {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.richtext p {
  margin-bottom: var(--space-md);
}

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

/* ===== PORTRAIT (hero face in the left gutter) ===== */
/* Placement is driven by the block's fields via custom properties:
   --portrait-width and --portrait-offset (px the face sits left of the
   content column). Responsive breakpoints below can still override width. */
.block--portrait {
  position: absolute;
  top: var(--space-4xl);
  left: calc(-1 * var(--portrait-offset, 212px));
  width: var(--portrait-width, 180px);
}

.hero__heading {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

/* Face-swap component: grinning face when the cursor is over the face pixels
   (not the surrounding box). The .is-face-hover class is toggled from JS by
   sampling the portrait's alpha channel under the cursor. */
.face-swap {
  position: relative;
  width: 100%;
  aspect-ratio: 724 / 1086;
}

.face-swap__face {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.face-swap__face--hover {
  opacity: 0;
}

.face-swap.is-face-hover .face-swap__face--default {
  opacity: 0;
}

.face-swap.is-face-hover .face-swap__face--hover {
  opacity: 1;
}

/* ===== ABOUT ===== */
.about__list {
  margin-top: var(--space-md);
  padding-left: var(--space-lg);
  list-style: disc;
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  line-height: 1.75;
}

.about__list li {
  margin-bottom: var(--space-sm);
}

/* ===== PROJECTS ===== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-bg);
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.project-card:hover {
  background: var(--color-card-bg);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.project-card__name {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.project-card__course {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.project-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
}

.project-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
}

.project-card__live {
  flex-shrink: 0;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 6px;
  background: var(--color-live-bg);
  color: var(--color-live-text);
  transition: opacity var(--transition-fast);
}

.project-card__live:hover {
  opacity: 0.8;
}

/* ===== CONTACT / FOOTER ===== */
.contact__socials {
  display: flex;
  gap: var(--space-md);
}

.contact__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.contact__social-link:hover {
  color: var(--color-text);
  border-color: var(--color-text);
  background-color: var(--color-card-bg);
}

.contact__social-link svg {
  width: 20px;
  height: 20px;
}

/* ===== BLOG (server-rendered public pages) ===== */
.blog,
.post {
  padding: var(--space-4xl) 0;
}

.blog__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2xl);
}

.blog__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.blog__item-link {
  display: inline-block;
  transition: opacity var(--transition-fast);
}

.blog__item-link:hover {
  opacity: 0.7;
}

.blog__item-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xs);
}

.blog__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.blog__tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.blog__excerpt {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.blog__empty {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
}

/* Single post */
.post__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.post__meta {
  margin-bottom: var(--space-2xl);
}

/* Post body: sanitized author HTML. Sensible vertical rhythm for prose. */
.post__body {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--color-text);
}

.post__body > * + * {
  margin-top: var(--space-md);
}

.post__body h1,
.post__body h2,
.post__body h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: var(--space-2xl);
}

.post__body h2 {
  font-size: var(--font-size-2xl);
}

.post__body h3 {
  font-size: var(--font-size-xl);
}

.post__body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.post__body ul,
.post__body ol {
  padding-left: var(--space-lg);
}

.post__body ul {
  list-style: disc;
}

.post__body ol {
  list-style: decimal;
}

.post__body li {
  margin-bottom: var(--space-xs);
}

.post__body blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: var(--space-md);
  color: var(--color-text-muted);
  font-style: italic;
}

.post__body img {
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.post__body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: var(--color-card-bg);
  padding: 2px 6px;
  border-radius: 6px;
}

.post__body pre {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-md);
  overflow-x: auto;
}

.post__body pre code {
  background: none;
  padding: 0;
}

.post__back {
  margin-top: var(--space-3xl);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.post__back a:hover {
  color: var(--color-text);
}

/* ===== FADE-IN ANIMATION ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== CANVAS MODE (free-position layout, ≥768px) ===== */
/* Blocks carry absolute frames set inline by the renderer; the rhythm margins
   above would offset those positions, so they are reset here. .canvas keeps
   design-space coordinates under a scale() transform while .canvas-viewport
   reserves the scaled size in normal flow (transforms don't affect layout). */
main.canvas-page {
  max-width: none;
}

#content.canvas-mode .block {
  margin: 0;
}

.canvas-viewport {
  margin: 0 auto;
  overflow: visible;
}

.canvas {
  position: relative;
}

/* Owner-only floating Edit button (added by script.js after /api/me). */
.edit-fab {
  position: fixed;
  right: var(--space-lg);
  bottom: var(--space-lg);
  z-index: 200;
  padding: 10px 22px;
  border: none;
  border-radius: 999px;
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: opacity var(--transition-fast);
}

.edit-fab:hover {
  opacity: 0.85;
}

.edit-fab:disabled {
  opacity: 0.5;
  cursor: default;
}

body.editing .edit-fab {
  display: none;
}

/* ===== RESPONSIVE: TABLET ===== */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2.25rem;
    --font-size-3xl: 1.75rem;
    --space-4xl: 4rem;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .block--portrait {
    width: 150px;
  }
}

/* ===== RESPONSIVE: NOT ENOUGH GUTTER FOR THE FACE ===== */
@media (max-width: 1180px) {
  .block--portrait {
    position: static;
    left: auto;
    margin-bottom: var(--space-xl);
  }
}

/* ===== RESPONSIVE: MOBILE ===== */
@media (max-width: 480px) {
  :root {
    --font-size-4xl: 1.875rem;
    --font-size-lg: 1rem;
    --space-4xl: 3rem;
    --space-3xl: 2.5rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .hero__heading {
    margin-bottom: var(--space-md);
  }

  .project-card {
    padding: var(--space-md);
  }
}