/* ===========================
   CSS VARIABLES & RESET
   =========================== */
:root {
  --bg:           #ffffff;
  --surface:      #ffffff;
  --surface-hover:#f7f3fb;
  --text-primary: #111111;
  --text-secondary:#555555;
  --text-caption: #111111;
  --caption-bg:   rgba(255,255,255,0.92);
  --radius-card:  18px;
  --radius-avatar:50%;
  --radius-btn:   14px;
  --shadow-card:  0 2px 16px rgba(80,40,120,0.07);
  --shadow-hover: 0 8px 32px rgba(80,40,120,0.14);
  --font-display: 'DM Sans', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --sidebar-w:    460px;
  --transition:   0.22s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  font-family: var(--font-body);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ===========================
   LAYOUT
   =========================== */
.layout {
  display: flex;
  min-height: 100vh;
  gap: 0;
}

/* ===========================
   SIDEBAR
   =========================== */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  padding: 48px 32px 48px 36px;
  display: flex;
  flex-direction: column;
  gap: 40px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  scrollbar-width: none;
}
.sidebar::-webkit-scrollbar { display: none; }

/* Profile */
.profile-section {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.profile-avatar-wrap {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-avatar);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(80,40,120,0.15);
  flex-shrink: 0;
}
.profile-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.profile-name {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  white-space: pre-wrap;
}

.profile-desc {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-primary);
  font-weight: 300;
  white-space: pre-wrap;
}

/* Links */
.links-section {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 10px;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--surface);
  border: none;
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition);
}
.link-btn.icon-only {
  gap: 0;
  padding: 10px;
  min-width: 40px;
  min-height: 40px;
}
.link-btn:hover {
  box-shadow: var(--shadow-hover);
  background: var(--surface-hover);
  transform: translateY(-2px);
}
.link-btn img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  display: block;
}
.link-btn .link-icon-svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.link-btn .link-label {
  /* visible only if icon fails to communicate alone */
  white-space: pre-wrap;
}

.side-remark {
  margin-top: auto;
  color: var(--text-secondary);
  font-size: 0.75rem;
  line-height: 1.65;
  font-weight: 300;
  white-space: pre-wrap;
}

/* ===========================
   MAIN CONTENT
   =========================== */
.main-content {
  flex: 1;
  padding: 40px 36px 60px 28px;
  display: flex;
  flex-direction: column;
  gap: 36px;
  min-width: 0;
}

/* ===========================
   SECTION
   =========================== */
.section-block {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.section-header {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 16px 22px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-card);
  letter-spacing: 0.01em;
  white-space: pre-wrap;
}

/* ===========================
   PROJECT GRID
   =========================== */
.project-grid {
  display: grid;
  gap: 14px;
}

/* Layout: 2-column grid (4 items → 2x2) */
.project-grid.layout-2col {
  grid-template-columns: 1fr 1fr;
}

.project-grid.layout-manual {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-flow: dense;
}

/* Layout: 1 large + 2 small (3 items) */
.project-grid.layout-1large-2small {
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto;
}
.project-grid.layout-1large-2small .project-card:first-child {
  grid-column: 1 / 3;
}

/* Layout: single full-width (1 item) */
.project-grid.layout-single {
  grid-template-columns: 1fr;
}

/* Layout: 3 equal columns (≥5 items or 3 items flat) */
.project-grid.layout-3col {
  grid-template-columns: 1fr 1fr 1fr;
}

/* ===========================
   PROJECT CARD
   =========================== */
.project-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-card);
  aspect-ratio: 16/9;
  text-decoration: none;
  display: block;
  background: #1a0a2e;
  transition: box-shadow var(--transition), transform var(--transition);
}
.project-grid.layout-manual .project-card {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}
.project-grid.layout-manual .project-card.project-card-small {
  grid-column: span 1;
  aspect-ratio: 8 / 9;
}
.project-grid.layout-manual .project-card.project-card-medium {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}
.project-grid.layout-manual .project-card.project-card-large {
  grid-column: span 4;
  aspect-ratio: 32 / 9;
}
.project-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  position: absolute;
  inset: 0;
  padding: 0;
  background: black;
}

.card-description,
.card-caption {
  position: absolute;
  font-family: var(--font-body);
  max-width: calc(100% - 28px);
  overflow: hidden;
  z-index: 2;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.card-description {
  top: 14px;
  left: 14px;
  color: var(--caption-bg);
  font-size: 1.1rem;
    max-width: 50%;
  font-weight: 600;
  line-height: 1.35;
  text-shadow: 0 2px 3px rgba(0,0,0,0.55);
}

.card-caption {
  bottom: 14px;
  left: 14px;
  background: var(--caption-bg);
  color: var(--text-caption);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 11px;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 1px 8px rgba(0,0,0,0.10);
}

/* ===========================
   MOBILE RESPONSIVE
   =========================== */
@media (max-width: 860px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-width: unset;
    position: static;
    height: auto;
    padding: 36px 24px 24px;
    flex-direction: column;
    gap: 28px;
  }

  .profile-section {
    align-items: flex-start;
  }

  .links-section {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .main-content {
    padding: 0 16px 48px;
    gap: 28px;
  }

  .project-grid.layout-2col,
  .project-grid.layout-1large-2small,
  .project-grid.layout-3col {
    grid-template-columns: 1fr;
  }

  .project-grid.layout-manual {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-grid.layout-1large-2small .project-card:first-child {
    grid-column: 1 / 2;
  }

  .project-grid.layout-manual .project-card,
  .project-grid.layout-manual .project-card.project-card-small,
  .project-grid.layout-manual .project-card.project-card-medium,
  .project-grid.layout-manual .project-card.project-card-large {
    aspect-ratio: 16 / 9;
  }

  .project-grid.layout-manual .project-card.project-card-small {
    grid-column: span 1;
  }

  .project-grid.layout-manual .project-card.project-card-medium,
  .project-grid.layout-manual .project-card.project-card-large {
    grid-column: span 2;
  }
}

@media (max-width: 480px) {
  .profile-name {
    font-size: 1.8rem;
  }

  .section-header {
    font-size: 0.92rem;
  }

  .card-description {
    font-size: 0.8rem;
  }

  .card-caption {
    font-size: 0.72rem;
  }

  .project-grid.layout-manual {
    grid-template-columns: 1fr;
  }

  .project-grid.layout-manual .project-card.project-card-small,
  .project-grid.layout-manual .project-card.project-card-medium,
  .project-grid.layout-manual .project-card.project-card-large {
    grid-column: auto;
    aspect-ratio: 16 / 9;
  }
}

/* ===========================
   FADE-IN ANIMATION
   =========================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.profile-section,
.links-section,
.section-block {
  animation: fadeUp 0.5s ease both;
}
.profile-section  { animation-delay: 0.05s; }
.links-section    { animation-delay: 0.15s; }
.section-block:nth-child(1) { animation-delay: 0.10s; }
.section-block:nth-child(2) { animation-delay: 0.20s; }
.section-block:nth-child(3) { animation-delay: 0.30s; }
.section-block:nth-child(4) { animation-delay: 0.40s; }