/* ============================================================
   PORTFOLIO — STYLE.CSS
   Unified styles for all pages
   ============================================================ */


/* ============================================================
   1. CUSTOM PROPERTIES
   ============================================================ */
:root {
  color-scheme: light;

  /* Surfaces */
  --bg:            #fbfbfa;
  --surface:       #ffffff;
  --surface-alt:   #f4f4f5;
  --border:        #e4e4e7;
  --border-faint:  #f0f0f1;

  /* Text */
  --text-1: #18181b;
  --text-2: #52525b;
  --text-3: #a1a1aa;

  /* Accent */
  --accent:     #2563eb;
  --accent-dim: #1d4ed8;

  /* Window dots */
  --dot-r: #ef4444;
  --dot-y: #f59e0b;
  --dot-g: #22c55e;

  /* Typography */
  --font-sans: system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

  /* Spacing */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;

  /* Radii */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lift: 0 6px 20px rgba(0,0,0,0.09), 0 2px 6px rgba(0,0,0,0.05);

  /* Transitions */
  --t-fast: 150ms ease;
  --t-base: 240ms ease;

  /* Layout */
  --page-max:    1100px;
  --content-max:  720px;
}

[data-theme="dark"] {
  color-scheme: dark;

  --bg:           #111113;
  --surface:      #1c1c1f;
  --surface-alt:  #26262b;
  --border:       #2e2e34;
  --border-faint: #222226;

  --text-1: #f4f4f5;
  --text-2: #a1a1aa;
  --text-3: #71717a;

  --accent:     #60a5fa;
  --accent-dim: #93c5fd;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.22), 0 2px 8px rgba(0,0,0,0.18);
  --shadow-lift: 0 6px 20px rgba(0,0,0,0.38), 0 2px 6px rgba(0,0,0,0.22);
}


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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 220ms ease, color 220ms ease;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.015em;
}

figure {
  margin: 0;
}


/* ============================================================
   3. LAYOUT UTILITIES
   ============================================================ */
.page-wrap {
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--sp-8);
}

.content-wrap {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--sp-8);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}


/* ============================================================
   4. SITE HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background-color 220ms ease, border-color 220ms ease;
}

.site-header .page-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-name {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-1);
  transition: color var(--t-fast);
}

.site-name:hover {
  color: var(--accent);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.875rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 2rem;
  font-size: 0.77rem;
  font-family: var(--font-mono);
  color: var(--text-2);
  letter-spacing: 0.025em;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  white-space: nowrap;
}

.theme-toggle:hover {
  background: var(--border);
  color: var(--text-1);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}


/* ============================================================
   5. HOMEPAGE — HERO
   ============================================================ */
.hero {
  padding: var(--sp-16) 0 var(--sp-12);
  border-bottom: 1px solid var(--border);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: var(--sp-4);
}

.hero-name {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--text-1);
  line-height: 1.1;
  margin-bottom: var(--sp-3);
}

.hero-role {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-2);
  margin-bottom: var(--sp-5);
}

.hero-description {
  font-size: 0.9rem;
  color: var(--text-3);
  max-width: 460px;
  line-height: 1.7;
}


/* ============================================================
   6. HOMEPAGE — PROJECT GRID
   ============================================================ */
.projects-section {
  padding: var(--sp-12) 0 var(--sp-16);
}

.grid-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-8);
}

.grid-eyebrow::before {
  content: '';
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text-3);
  flex-shrink: 0;
}

.grid-eyebrow-text {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

/* ---- Window card ---- */
.project-window {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transform: translateZ(0);
  will-change: transform;
  transition:
    transform var(--t-base),
    box-shadow var(--t-base),
    border-color var(--t-base),
    background-color 220ms ease;
}

.project-window:hover {
  transform: scale(1.03) translateZ(0);
  box-shadow: var(--shadow-lift);
  border-color: transparent;
}

.project-window:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Window chrome */
.window-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 0.55rem var(--sp-4);
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
  transition: background-color 220ms ease, border-color 220ms ease;
}

.window-dots {
  display: flex;
  gap: 5px;
  flex-shrink: 0;
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-r { background: var(--dot-r); }
.dot-y { background: var(--dot-y); }
.dot-g { background: var(--dot-g); }

.window-label {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  color: var(--text-3);
  letter-spacing: 0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Screenshot area */
.window-screen {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface-alt);
}

.window-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-base);
}

.project-window:hover .window-screen img {
  transform: scale(1.03);
}

/* Info area */
.window-info {
  padding: var(--sp-5);
}

.window-project-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-2);
}

.window-project-desc {
  font-size: 0.825rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: var(--sp-4);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.02em;
  color: var(--text-3);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: var(--r-sm);
  transition: background-color 220ms ease, border-color 220ms ease;
}


/* ============================================================
   7. CASE STUDY — PAGE SHELL
   ============================================================ */
.case-page {
  padding-bottom: var(--sp-16);
}

/* Back navigation */
.back-nav {
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-10);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-3);
  transition: color var(--t-fast);
}

.back-link:hover {
  color: var(--accent);
}

.back-arrow {
  display: inline-block;
  transition: transform var(--t-fast);
  font-style: normal;
}

.back-link:hover .back-arrow {
  transform: translateX(-3px);
}

/* Project header */
.project-header {
  padding-bottom: var(--sp-10);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--sp-10);
}

.project-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-4);
}

.project-title {
  font-size: clamp(1.75rem, 4.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-1);
  line-height: 1.15;
  margin-bottom: var(--sp-6);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6);
  margin-bottom: var(--sp-6);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.meta-key {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
}

.meta-val {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
}

.project-summary {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--text-2);
}

.update-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-3);
  letter-spacing: 0.01em;
}

.last-modified-date {
  color: var(--accent);
  font-weight: 500;
}


/* ============================================================
   8. CASE STUDY — SECTIONS
   ============================================================ */
.case-section {
  margin-bottom: var(--sp-12);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  padding-bottom: var(--sp-4);
  margin-bottom: var(--sp-8);
  border-bottom: 1px solid var(--border);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.02em;
}

/* Prose */
.prose p {
  font-size: 0.925rem;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: var(--sp-4);
}

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


/* ============================================================
   9. CASE STUDY — TOOLS BLUEPRINT MATRIX
   ============================================================ */
.blueprint-matrix {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 220ms ease;
}

.blueprint-row {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: var(--sp-6);
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--border-faint);
  align-items: start;
  transition: background-color 220ms ease, border-color 220ms ease;
}

.blueprint-row:last-child {
  border-bottom: none;
}

.blueprint-row:nth-child(odd) {
  background: var(--surface);
}

.blueprint-row:nth-child(even) {
  background: var(--surface-alt);
}

.blueprint-layer {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
  padding-top: 0.2rem;
  line-height: 1.45;
}

.blueprint-tool {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.015em;
  margin-bottom: 3px;
}

.blueprint-note {
  display: block;
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.6;
}


/* ============================================================
   10. CASE STUDY — IMAGE BLOCK
   ============================================================ */
.image-block {
  margin: var(--sp-10) 0;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-card);
  transition: border-color 220ms ease, background-color 220ms ease;
}

.image-block img {
  width: 100%;
  height: auto;
  display: block;
  background: var(--surface-alt);
  min-height: 180px;
}

.image-caption {
  padding: var(--sp-3) var(--sp-5);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  letter-spacing: 0.02em;
  transition: border-color 220ms ease;
}


/* ============================================================
   11. CASE STUDY — ACTION BUTTONS
   ============================================================ */
.case-actions {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
  padding-top: var(--sp-10);
  border-top: 1px solid var(--border);
  margin-top: var(--sp-12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.5rem;
  border-radius: var(--r-md);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition:
    background var(--t-fast),
    color var(--t-fast),
    border-color var(--t-fast),
    transform var(--t-fast),
    box-shadow var(--t-fast);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}

[data-theme="dark"] .btn-primary:hover {
  box-shadow: 0 4px 14px rgba(96, 165, 250, 0.18);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-1);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-alt);
  transform: translateY(-1px);
}


/* ============================================================
   12. FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--sp-8) 0;
  transition: border-color 220ms ease;
}

.site-footer .page-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy,
.footer-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
  letter-spacing: 0.02em;
}


/* ============================================================
   13. RESPONSIVE
   ============================================================ */
@media (max-width: 960px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  :root {
    --sp-8:  1.5rem;
    --sp-12: 2.25rem;
    --sp-16: 3rem;
  }

  .page-wrap,
  .content-wrap {
    padding-inline: var(--sp-5);
  }

  .hero {
    padding: var(--sp-10) 0 var(--sp-8);
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-5);
  }

  /* Disable scale on touch devices */
  .project-window:hover {
    transform: none;
    box-shadow: var(--shadow-card);
    border-color: var(--border);
  }

  .project-window:hover .window-screen img {
    transform: none;
  }

  .project-title {
    font-size: 1.75rem;
  }

  .blueprint-row {
    grid-template-columns: 1fr;
    gap: var(--sp-2);
    padding: var(--sp-4) var(--sp-5);
  }

  .project-meta {
    gap: var(--sp-4);
  }

  .case-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .site-footer .page-wrap {
    flex-direction: column;
    gap: var(--sp-2);
    text-align: center;
  }
}