/* ════════════════════════════════════════════════════════
   B² STUDIO — styles.css
   Design system: industrial / architectural / restrained
   ════════════════════════════════════════════════════════ */

/* ─── TOKENS ──────────────────────────────────────────────────── */
:root {
  /* Color */
  --black:        #0B0B0B;
  --carbon:       #161616;
  --charcoal:     #222222;
  --iron:         #333333;
  --aluminum:     #9CA3AF;
  --silk:         #D4D4D0;
  --warm-white:   #F2F2EE;
  --blue:         #4D6FFF;
  --amber:        #FFB547;

  /* Semantic — dark mode default */
  --bg-primary:        var(--black);
  --bg-secondary:      var(--carbon);
  --bg-tertiary:       var(--charcoal);
  --text-primary:      var(--warm-white);
  --text-secondary:    var(--aluminum);
  --text-tertiary:     rgba(255,255,255,0.22);
  --border:            rgba(255,255,255,0.08);
  --grid-color:        rgba(255,255,255,0.035);
  --rule-color:        rgba(255,255,255,0.09);
  --logo-color:        var(--warm-white);
  --logo-dark-face:    #181818;

  /* Typography */
  --font-display: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  /* Spacing */
  --gap:     clamp(1.5rem, 5vw, 4rem);
  --gap-sm:  clamp(1rem, 3vw, 2rem);
  --section: clamp(2.5rem, 5vw, 4rem);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  --bg-primary:        var(--warm-white);
  --bg-secondary:      #E8E8E4;
  --bg-tertiary:       #DCDCD8;
  --text-primary:      var(--black);
  --text-secondary:    #555550;
  --text-tertiary:     rgba(0,0,0,0.20);
  --border:            rgba(0,0,0,0.08);
  --grid-color:        rgba(0,0,0,0.03);
  --rule-color:        rgba(0,0,0,0.08);
  --logo-color:        var(--black);
  --logo-dark-face:    #444444;
}

/* ─── RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-display);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
  cursor: none;
}

a { color: inherit; text-decoration: none; cursor: none; }
button { font-family: inherit; border: none; background: none; cursor: none; }
ul { list-style: none; }

/* ─── GRID OVERLAY ────────────────────────────────────────────── */
.grid-overlay {
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: 0 0;
  transition: background-image 0.4s;
  will-change: transform, background-position;
}

/* ─── CURSOR — dual-layer blueprint reticle ───────────────────── */
.cursor-inner,
.cursor-outer {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 9999;
  will-change: transform;
}

.cursor-inner {
  z-index: 10000;
  transition: opacity 0.2s;
}

.cursor-outer {
  --cursor-accent: var(--blue);
  transition: opacity 0.2s;
}

.cursor-outer--hover {
  --cursor-accent: var(--amber);
}

.cursor-inner--hover .cursor-dot--inner {
  background: var(--amber);
}

.cursor-dot--inner {
  position: absolute;
  width: 4px; height: 4px;
  background: var(--blue);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: background 0.2s;
}

.cursor-ring {
  position: absolute;
  width: 28px; height: 28px;
  border: 1px solid var(--cursor-accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.85;
  transition: border-color 0.2s;
}

.cursor-line {
  position: absolute;
  background: var(--cursor-accent);
  opacity: 0.4;
  transform: translate(-50%, -50%);
  transition: background 0.2s;
}
.cursor-line--h {
  width: 56px; height: 1px;
}
.cursor-line--v {
  width: 1px; height: 56px;
}

.cursor-coords {
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  white-space: nowrap;
  user-select: none;
}

@media (pointer: coarse) {
  body, a, button { cursor: auto; }
  .cursor-inner, .cursor-outer { display: none; }
}

#logo-canvas,
.logo-scene {
  cursor: grab !important;
}

#logo-canvas:active,
.logo-scene:active {
  cursor: grabbing !important;
}

@media (prefers-reduced-motion: reduce) {
  .cursor-outer { transition: none; }
}

/* ─── NAV ─────────────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.4rem var(--gap);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-primary) 82%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.4s;
  overflow: visible;
}

.nav-logo {
  display: flex;
  align-items: center;
  line-height: 0;
  flex-shrink: 0;
  height: 1.65rem;
  overflow: visible;
}
.nav-logo-img {
  height: 1.65rem;
  width: auto;
  display: block;
  transform: scale(2);
  transform-origin: left center;
}
[data-theme="dark"] .nav-logo-img--lightbg { display: none; }
[data-theme="light"] .nav-logo-img--darkbg { display: none; }

.nav-right {
  display: flex; align-items: center; gap: 2.5rem;
}

.nav-links {
  display: flex; gap: 2.5rem;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }

.theme-toggle {
  width: 30px; height: 30px;
  border: 1px solid var(--border) !important;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}
.theme-toggle:hover {
  border-color: var(--text-secondary) !important;
  color: var(--text-primary);
}
.theme-toggle svg { width: 13px; height: 13px; }

/* ─── SECTION SHARED ──────────────────────────────────────────── */
section {
  position: relative; z-index: 1;
  padding: var(--section) var(--gap);
  border-top: 1px solid var(--border);
}

#hero { border-top: none; }

#capabilities {
  padding-top: calc(var(--section) * 0.75);
}

.section-label {
  display: flex; align-items: center; gap: 1.2rem;
  margin-bottom: 2rem;
}
.section-label::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.section-index, .section-name {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ─── HERO ────────────────────────────────────────────────────── */
#hero {
  min-height: auto;
  display: flex;
  align-items: center;
  padding: 5rem var(--gap) 2.5rem;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-logo-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

/* Registration corners */
.corner {
  position: absolute;
  width: 20px; height: 20px;
  opacity: 0.25;
}
.corner--tl { top: 5.5rem; left: var(--gap); border-top: 1px solid var(--text-primary); border-left: 1px solid var(--text-primary); }
.corner--tr { top: 5.5rem; right: var(--gap); border-top: 1px solid var(--text-primary); border-right: 1px solid var(--text-primary); }
.corner--bl { bottom: 2rem; left: var(--gap); border-bottom: 1px solid var(--text-primary); border-left: 1px solid var(--text-primary); }
.corner--br { bottom: 2rem; right: var(--gap); border-bottom: 1px solid var(--text-primary); border-right: 1px solid var(--text-primary); }

.hero-rule {
  position: absolute; left: 0; right: 0; height: 1px;
  background: var(--rule-color);
}
.hero-rule--top    { top: 5.5rem; }
.hero-rule--bottom { bottom: 1.5rem; }

/* Axis labels */
.axis-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-tertiary);
  letter-spacing: 0.08em;
}
.axis-label--x {
  bottom: 1.5rem;
  left: var(--gap);
  transform: none;
}
.axis-label--y {
  top: 50%; left: 0.8rem;
  transform: translateY(-50%) rotate(-90deg);
  white-space: nowrap;
}

/* Logo scene */
.logo-scene {
  position: relative;
  width: min(380px, 42vw);
  height: min(380px, 42vw);
  display: flex; align-items: center; justify-content: center;
}
#logo-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  touch-action: none;
}
.logo-sup {
  position: absolute;
  top: 10%;
  right: 6%;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.8rem, 9vw, 5.5rem);
  color: var(--text-primary);
  pointer-events: none;
  user-select: none;
  line-height: 1;
  z-index: 2;
  transition: color 0.4s;
}
.coord-readout {
  position: absolute;
  bottom: -1.8rem;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-tertiary);
  letter-spacing: 0.07em;
  white-space: nowrap;
}
.drag-hint {
  position: absolute;
  bottom: 6%;
  right: 2%;
  left: auto;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-tertiary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: right;
  white-space: nowrap;
  z-index: 2;
}

/* Hero copy */
.hero-copy {
  text-align: left;
  z-index: 1;
  position: relative;
}
.hero-headline {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1rem, 2.8vw, 1.75rem);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  line-height: 1.65;
  white-space: pre-line;
}
.hero-sub {
  margin: 1.5rem 0 0;
  font-size: clamp(0.78rem, 1.4vw, 0.92rem);
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 420px;
}
.hero-cta {
  margin-top: 2rem;
  display: inline-flex; align-items: center; gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.hero-cta:hover { color: var(--text-primary); }
.hero-cta svg { width: 15px; animation: bounce 2.2s ease-in-out infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(5px)} }

/* ─── CAPABILITIES ────────────────────────────────────────────── */
.capabilities-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
  align-items: end;
}
.capabilities-headline {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  letter-spacing: -0.025em;
  line-height: 1.08;
}
.capabilities-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 360px;
}
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
}
.cap-card {
  padding: 2.5rem 2rem 3rem;
  border-right: 1px solid var(--border);
  position: relative; overflow: hidden;
  transition: background 0.3s;
}
.cap-card:last-child { border-right: none; }
.cap-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--blue);
  transition: width 0.4s var(--ease-out);
}
.cap-card:hover { background: color-mix(in srgb, var(--bg-secondary) 60%, transparent); }
.cap-card:hover::before { width: 100%; }
.cap-num {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  margin-bottom: 1.8rem;
}
.cap-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}
.cap-body {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

/* ─── WORK ────────────────────────────────────────────────────── */
#work {
  padding-top: calc(var(--section) * 0.85);
  padding-bottom: calc(var(--section) * 0.85);
}

.work-headline {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}
.projects-list { display: flex; flex-direction: column; }
.project-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto auto;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  cursor: none;
  position: relative; overflow: hidden;
}
.project-row::before {
  content: '';
  position: absolute; inset: 0;
  background: color-mix(in srgb, var(--bg-secondary) 55%, transparent);
  transform: translateX(-101%);
  transition: transform 0.4s var(--ease-out);
}
.project-row:hover::before { transform: translateX(0); }
.project-row > * { position: relative; z-index: 1; }
.proj-num {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
}
.proj-name {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(0.88rem, 1.8vw, 1.1rem);
  letter-spacing: 0.01em;
}
.proj-tags { display: flex; gap: 0.3rem; flex-wrap: wrap; justify-content: flex-end; }
.proj-tag {
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--border);
  color: var(--text-tertiary);
  transition: border-color 0.2s, color 0.2s;
}
.project-row:hover .proj-tag { border-color: var(--blue); color: var(--blue); }
.proj-arrow {
  font-size: 0.95rem;
  color: var(--text-tertiary);
  transition: color 0.2s, transform 0.3s var(--ease-out);
}
.project-row:hover .proj-arrow { color: var(--text-primary); transform: translateX(6px); }

/* ─── PHILOSOPHY ──────────────────────────────────────────────── */
#philosophy {
  background: var(--bg-secondary);
  padding-top: calc(var(--section) * 0.85);
}
.philosophy-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.philosophy-rule {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: 1.5rem;
  margin-bottom: 1.75rem;
}
.philosophy-rule::before, .philosophy-rule::after {
  content: ''; height: 1px; background: var(--border);
}
.philosophy-rule span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-tertiary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}
.philosophy-headline {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.6rem, 4.2vw, 3rem);
  letter-spacing: -0.015em;
  line-height: 1.25;
  margin-bottom: 2rem;
  white-space: pre-line;
}
.philosophy-body {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 2;
  max-width: 540px;
  margin: 0 auto 2rem;
}
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 2.5rem;
  text-align: left;
}
.pillar {
  padding: 2rem 1.75rem;
  background: var(--bg-secondary);
  transition: background 0.3s;
}
.pillar:hover { background: var(--bg-tertiary); }
.pillar-title {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.9rem;
}
.pillar-body {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ─── CONTACT ─────────────────────────────────────────────────── */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.contact-headline {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}
.contact-sub {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 2.5rem;
}
.contact-email {
  display: inline-flex; align-items: center; gap: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  padding: 1rem 1.5rem;
  border: 1px solid var(--border);
  transition: border-color 0.25s, background 0.25s;
}
.contact-email:hover {
  border-color: var(--blue);
  background: color-mix(in srgb, var(--blue) 7%, transparent);
}
.contact-email svg { flex-shrink: 0; }
.contact-specs {
  border: 1px solid var(--border);
}
.spec-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.67rem;
}
.spec-row:last-child { border-bottom: none; }
.spec-label { color: var(--text-tertiary); letter-spacing: 0.1em; text-transform: uppercase; }
.spec-value { color: var(--text-secondary); }
.spec-value.accent { color: var(--blue); }

/* ─── FOOTER ──────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem var(--gap);
  display: flex; justify-content: space-between; align-items: center;
  position: relative; z-index: 1;
}
.footer-left, .footer-right {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-tertiary);
  letter-spacing: 0.09em;
}

/* ─── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
  .cap-card:nth-child(2) { border-right: none; }
  .cap-card:nth-child(1),
  .cap-card:nth-child(2) { border-bottom: 1px solid var(--border); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-logo-img {
    transform: scale(1.5);
    transform-origin: left center;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .hero-logo-col {
    align-items: center;
  }
  .hero-copy {
    text-align: center;
  }
  .hero-sub {
    margin-inline: auto;
  }
  .capabilities-header { grid-template-columns: 1fr; gap: 1.5rem; }
  .contact-inner { grid-template-columns: 1fr; gap: 3rem; }
  .pillars { grid-template-columns: 1fr; }
  .project-row { grid-template-columns: 2.5rem 1fr auto; }
  .proj-tags { display: none; }
  .logo-scene { width: min(300px, 86vw); height: min(300px, 86vw); }
  .drag-hint {
    bottom: 4%;
    right: 0;
  }
  .axis-label--x {
    left: 50%;
    transform: translateX(-50%);
  }
}

@media (max-width: 480px) {
  .capabilities-grid { grid-template-columns: 1fr; }
  .cap-card { border-right: none; border-bottom: 1px solid var(--border); }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}