/* ============================================================
   TOZEN Engineering Solutions — Global Stylesheet
   ============================================================ */

:root {
  --ink: #0A0A0A;
  --ink-soft: #5A5A5A;
  --white: #FFFFFF;
  --paper: #F5F5F3;
  --blue: #0C5EFF;
  --orange: #FF550C;
  --line: #E2E2DE;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'Inter', sans-serif;
  --display: 'Space Grotesk', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }

.mono { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.04em; }
.mono-v { font-family: var(--mono); font-size: 0.85rem; }

.display {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1, h2, h3, h4 { font-family: var(--display); font-weight: 700; line-height: 1.2; }
h2 { font-size: clamp(1.4rem, 2.5vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; margin-bottom: 12px; }
h4 { font-size: 0.95rem; margin-bottom: 8px; }

p { margin-bottom: 12px; }

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   HEADER / NAV
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  text-decoration: none;
}

.brand:hover { text-decoration: none; }

.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255,255,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--blue);
}

.brand-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand-name em {
  font-style: normal;
  color: var(--orange);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: rgba(255,255,255,0.75);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.nav a:hover,
.nav a.on { color: var(--white); }

.nav a.on { border-bottom: 2px solid var(--blue); padding-bottom: 2px; }

.nav-cta {
  background: var(--blue);
  color: var(--white) !important;
  padding: 8px 16px;
  font-size: 0.8rem !important;
  font-weight: 600 !important;
  border-radius: 2px;
}

.nav-cta:hover { background: #0a4fd6; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.4rem;
  cursor: pointer;
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.7);
  padding: 56px 0 32px;
  font-size: 0.85rem;
}

.site-footer .wrap {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.site-footer h4 {
  color: var(--white);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.site-footer a {
  color: rgba(255,255,255,0.7);
  display: block;
  margin-bottom: 8px;
}

.site-footer a:hover { color: var(--white); }

.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  background: var(--ink);
  color: var(--white);
  padding: 96px 0 72px;
  position: relative;
  overflow: hidden;
}

.hero-photo {
  position: absolute;
  inset: 0;
  background-image: url("../images/web/img_2464.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,10,10,0.92) 0%, rgba(10,10,10,0.72) 45%, rgba(10,10,10,0.45) 100%);
  z-index: 1;
}

.hero .wrap {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-eyebrow {
  color: var(--blue);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

.hero h1 { margin-bottom: 20px; }

.hero h1 .u {
  color: var(--blue);
  border-bottom: 2px solid var(--blue);
}

.hero-sub {
  color: rgba(255,255,255,0.65);
  font-size: 1.05rem;
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-blueprint {
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(10,10,10,0.55);
  backdrop-filter: blur(2px);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.hero-blueprint svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 12px 22px;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 2px;
}

.btn:hover {
  background: var(--ink);
  color: var(--white);
  text-decoration: none;
}

.btn-accent {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
}

.btn-accent:hover {
  background: #0a4fd6;
  border-color: #0a4fd6;
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255,255,255,0.4);
  color: var(--white);
}

.btn-ghost:hover {
  border-color: var(--white);
  background: transparent;
  color: var(--white);
}

.arr { font-size: 1.1rem; line-height: 1; }

/* ============================================================
   STAT STRIP
   ============================================================ */

.stat-strip {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.stat-strip .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat-cell {
  padding: 32px 24px;
  border-right: 1px solid var(--line);
}

.stat-cell:last-child { border-right: none; }

.stat-cell .num {
  font-family: var(--display);
  font-weight: 700;
  font-size: 2.6rem;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-cell .num em {
  font-style: normal;
  color: var(--blue);
  font-size: 1.4rem;
}

.stat-cell .lbl {
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
  padding: 72px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 32px;
}

.section-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--blue);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.section-head .rule {
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ============================================================
   CATEGORY GRID
   ============================================================ */

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.cat-cell {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 24px;
  text-decoration: none;
  color: var(--ink);
  transition: all 0.2s;
}

.cat-cell:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.cat-cell .idx {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-soft);
  letter-spacing: 0.06em;
}

.cat-cell .cat-photo {
  display: block;
  width: 100%;
  height: 140px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
  margin: -24px -24px 0;
}

.cat-cell .cat-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.cat-cell:hover .cat-photo img {
  transform: scale(1.05);
}

.cat-cell .icon {
  width: 44px;
  height: 44px;
  margin: 8px 0;
}

.cat-cell h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.cat-cell p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  flex: 1;
}

.cat-cell .go {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--blue);
}

/* ============================================================
   PRODUCT GALLERY
   ============================================================ */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
  align-items: stretch;
}

.gallery-cell {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
  aspect-ratio: 3 / 2;
  width: 100%;
  min-width: 0;
}

.gallery-cell img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.4s ease;
}

.gallery-cell:hover img {
  transform: scale(1.06);
}

@media (max-width: 900px) {
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}

@media (max-width: 520px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   PRODUCT GRID
   ============================================================ */

.prod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.prod-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 20px;
  text-decoration: none;
  color: var(--ink);
  transition: all 0.2s;
}

.prod-cell:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.prod-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 150px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 4px;
}

.prod-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
}

.prod-thumb-svg svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
}

.prod-cell .code {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--blue);
  letter-spacing: 0.08em;
}

.prod-cell .name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}

.prod-cell .cat {
  font-size: 0.75rem;
  color: var(--ink-soft);
}

/* ============================================================
   SOLUTIONS TABLE
   ============================================================ */

.sol-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.sol-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding: 14px 16px;
  border-bottom: 2px solid var(--ink);
}

.sol-table td {
  padding: 18px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
  vertical-align: top;
}

.sol-table td.c1 {
  font-weight: 600;
  white-space: nowrap;
}

.sol-table tr:hover td { background: #FAFAF8; }

/* ============================================================
   SPEC TABLE
   ============================================================ */

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.spec-table th {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  width: 220px;
  vertical-align: top;
}

.spec-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

/* ============================================================
   INDUSTRY GRID
   ============================================================ */

.ind-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.ind-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 16px 18px;
  font-size: 0.9rem;
  font-weight: 500;
}

.ind-cell .dot {
  width: 8px;
  height: 8px;
  background: var(--blue);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================================
   SPLIT LAYOUT
   ============================================================ */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.split ul li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.split ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--blue);
}

/* ============================================================
   CTA BAND
   ============================================================ */

.cta-band {
  background: var(--ink);
  color: var(--white);
  padding: 72px 0;
}

.cta-band .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-band h2 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 12px;
}

.cta-band p {
  color: rgba(255,255,255,0.65);
  max-width: 560px;
}

/* ============================================================
   PAGE HERO
   ============================================================ */

.page-hero {
  background: var(--ink);
  color: var(--white);
  padding: 64px 0 48px;
}

.page-hero .crumb {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.page-hero .crumb a { color: rgba(255,255,255,0.7); }
.page-hero .crumb a:hover { color: var(--white); }
.page-hero .crumb .sep { margin: 0 8px; color: rgba(255,255,255,0.3); }

.page-hero h1 { margin-bottom: 16px; }

.page-hero .lede {
  color: rgba(255,255,255,0.65);
  font-size: 1.05rem;
  max-width: 680px;
}

.page-hero .lede a { color: var(--blue); }

/* ============================================================
   FILTER BAR / CHIPS
   ============================================================ */

.filter-bar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.search-box input {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus { border-color: var(--blue); }

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 8px 16px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 2px;
}

.chip:hover { border-color: var(--blue); }

.chip.on {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

.result-line {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.result-line b { color: var(--ink); }

/* ============================================================
   NOTE STRIP
   ============================================================ */

.note-strip {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 18px 20px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.note-strip .mono {
  color: var(--blue);
  white-space: nowrap;
  padding-top: 2px;
}

/* ============================================================
   PRODUCT DETAIL
   ============================================================ */

.pd-head {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.pd-visual {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.pd-visual svg {
  width: 100%;
  max-width: 380px;
  height: auto;
}

.pd-photo {
  width: 100%;
  max-width: 380px;
  height: auto;
  object-fit: contain;
  display: block;
}

.pd-info .tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.pd-info h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 12px;
}

.pd-info .model {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.pd-info .desc {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

/* ============================================================
   FORMS
   ============================================================ */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }

.field label {
  font-size: 0.8rem;
  font-weight: 600;
}

.field label .req { color: var(--orange); }

.field input,
.field textarea {
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.field input:focus,
.field textarea:focus { border-color: var(--blue); }

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.form-note {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ============================================================
   CONTACT GRID
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.contact-cell {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 24px;
}

.contact-cell h4 {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.contact-cell p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

.map-frame {
  border: 1px solid var(--line);
  background: var(--white);
  padding: 8px;
  margin-bottom: 48px;
}

.map-frame iframe {
  width: 100%;
  height: 360px;
  border: none;
  display: block;
}

/* ============================================================
   DOWNLOAD ROWS
   ============================================================ */

.dl-row {
  display: flex;
  align-items: center;
  gap: 20px;
  border: 1px solid var(--line);
  background: var(--white);
  padding: 18px 20px;
  margin-bottom: 12px;
  text-decoration: none;
  color: var(--ink);
  transition: all 0.2s;
}

.dl-row:hover {
  border-color: var(--blue);
  text-decoration: none;
  transform: translateX(2px);
}

.dl-row .fmt {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--orange);
  border: 1px solid var(--orange);
  padding: 4px 8px;
  flex-shrink: 0;
}

.dl-row .t {
  font-weight: 600;
  font-size: 0.9rem;
  flex: 1;
}

.dl-row .mono {
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.dl-row .get {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--blue);
  white-space: nowrap;
}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   UTILITIES
   ============================================================ */

.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }

/* ============================================================
   THEME SWITCHER
   ============================================================ */

#theme-switcher {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
}

.theme-toggle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
}

.theme-panel {
  position: absolute;
  bottom: 60px;
  right: 0;
  width: 260px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.16);
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.theme-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.theme-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.theme-panel-head .mono {
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.theme-current {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
}

.theme-options {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.theme-btn:hover {
  background: var(--paper);
}

.theme-btn.on {
  border-color: var(--blue);
  background: var(--paper);
}

.theme-swatch {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,0.12);
  flex-shrink: 0;
}

.theme-name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink);
}

/* Swatch previews */
.sw-blueprint {
  background: linear-gradient(135deg, #0A0A0A 50%, #0C5EFF 50%);
}

.sw-corporate {
  background: linear-gradient(135deg, #1B2A4A 50%, #3B82F6 50%);
}

.sw-steel {
  background: linear-gradient(135deg, #1F2937 50%, #F59E0B 50%);
}

.sw-classic {
  background: linear-gradient(135deg, #14532D 50%, #B45309 50%);
}

.sw-executive {
  background: linear-gradient(135deg, #0F1B2D 50%, #C9A227 50%);
}

.sw-minimal {
  background: linear-gradient(135deg, #111111 50%, #FFFFFF 50%);
}

.sw-electric {
  background: linear-gradient(135deg, #1A0B2E 50%, #D946EF 50%);
}

.sw-modern-corporate {
  background: linear-gradient(135deg, #0F172A 50%, #0284C7 50%);
}

.sw-sleek {
  background: linear-gradient(135deg, #0D1B1E 50%, #14B8A6 50%);
}

.sw-vibrant {
  background: linear-gradient(135deg, #FF6B6B 50%, #FFD93D 50%);
}

.sw-timber {
  background: linear-gradient(135deg, #3E2F23 50%, #B45309 50%);
}

.sw-mono {
  background: linear-gradient(135deg, #111111 50%, #E5E5E5 50%);
}

.sw-midnight {
  background: linear-gradient(135deg, #0A0A0F 50%, #00FF9C 50%);
}

.sw-ocean {
  background: linear-gradient(135deg, #0B1B3A 50%, #0EA5E9 50%);
}

.sw-sidebar {
  background: linear-gradient(135deg, #1A1A1A 50%, #0C5EFF 50%);
}

.sw-editorial {
  background: linear-gradient(135deg, #222222 50%, #B45309 50%);
}

.sw-overlap {
  background: linear-gradient(135deg, #1C1917 50%, #0D9488 50%);
}

.sw-split {
  background: linear-gradient(135deg, #0F172A 50%, #2563EB 50%);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .hero .wrap {
    grid-template-columns: 1fr;
  }

  .hero-blueprint { min-height: 200px; }

  .stat-strip .wrap {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-cell:nth-child(2) { border-right: none; }
  .stat-cell:nth-child(1),
  .stat-cell:nth-child(2) { border-bottom: 1px solid var(--line); }

  .split {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pd-head {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer .wrap {
    grid-template-columns: 1fr 1fr;
  }

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

  .nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
  }

  .nav.open { display: flex; }

  .nav-toggle { display: block; }
}

@media (max-width: 600px) {
  .stat-strip .wrap {
    grid-template-columns: 1fr;
  }

  .stat-cell {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .stat-cell:last-child { border-bottom: none; }

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

  .site-footer .wrap {
    grid-template-columns: 1fr;
  }

  .dl-row {
    flex-wrap: wrap;
    gap: 8px;
  }

  .dl-row .t { flex-basis: 100%; }

  #theme-switcher {
    bottom: 16px;
    right: 16px;
  }

  .theme-panel {
    width: 220px;
  }
}