/* ===================================================================
   VOLTIX.KZ — Refined industrial-technical aesthetic
   Palette: pure black / graphite / white
   =================================================================== */

:root {
  /* ===== LIGHT THEME (default) ===== */
  --bg: #fafafa;
  --bg-2: #ffffff;
  --bg-3: #f3f3f3;
  --bg-card: #ffffff;
  --bg-elev: #ffffff;
  --border: #e6e6e6;
  --border-2: #d4d4d4;
  --border-strong: #9a9a9a;
  --text: #0a0a0a;
  --text-2: #2a2a2a;
  --text-muted: #5e5e5e;
  --text-dim: #8a8a8a;
  /* semantic "accent" / "on-accent" — swap with theme */
  --white: #0a0a0a;
  --black: #ffffff;
  --grid-line: rgba(0, 0, 0, 0.045);
  --shadow-lift: 0 20px 60px -20px rgba(0, 0, 0, 0.18);
  --header-bg: rgba(250, 250, 250, 0.85);
  --overlay-bg: rgba(0, 0, 0, 0.35);

  /* Typography */
  --font-display: 'Unbounded', 'Inter Tight', sans-serif;
  --font-body: 'Manrope', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Spacing */
  --container: 1240px;
  --pad-x: clamp(1.25rem, 4vw, 2.5rem);

  /* Effects */
  --transition: 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ===== DARK THEME ===== */
[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-2: #111111;
  --bg-3: #161616;
  --bg-card: #181818;
  --bg-elev: #1f1f1f;
  --border: #262626;
  --border-2: #333333;
  --border-strong: #4a4a4a;
  --text: #f4f4f4;
  --text-2: #c2c2c2;
  --text-muted: #888888;
  --text-dim: #5e5e5e;
  --white: #ffffff;
  --black: #000000;
  --grid-line: rgba(255, 255, 255, 0.018);
  --shadow-lift: 0 20px 60px -20px rgba(0, 0, 0, 0.8);
  --header-bg: rgba(10, 10, 10, 0.85);
  --overlay-bg: rgba(0, 0, 0, 0.7);
}

/* smooth theme transition on body-level elements */
body, .site-header, .menu-panel, .service-tile, .footer-bottom, .btn, .float-btn {
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

/* ----------- reset ----------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }

/* Selection */
::selection { background: var(--white); color: var(--black); }

/* ----------- subtle background grid ----------- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at top, black 30%, transparent 80%);
}

/* ----------- layout ----------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  position: relative;
}

main { position: relative; z-index: 1; }

/* ----------- typography ----------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--border-strong);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--white);
}

h1 {
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  letter-spacing: -0.025em;
}

h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.55rem);
  font-weight: 600;
  letter-spacing: -0.015em;
}

p.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--text-2);
  max-width: 60ch;
  line-height: 1.55;
}

/* ============= HEADER ============= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  color: var(--white);
}
.logo .bolt {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--white);
  color: var(--black);
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 900;
}
.logo .domain {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-left: 0.3rem;
}
.header-right {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
}
.header-phone {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: 0.02em;
}
.header-phone:hover { color: var(--white); }

@media (min-width: 720px) {
  .header-phone { display: inline-flex; align-items: center; gap: 0.5rem; }
}

/* ----------- hamburger button ----------- */
.menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.85rem 0.55rem 1rem;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: var(--bg-2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  transition: background var(--transition), border-color var(--transition);
}
.menu-btn:hover { background: var(--bg-elev); border-color: var(--border-strong); }
.menu-btn .lines {
  position: relative;
  width: 18px;
  height: 12px;
}
.menu-btn .lines span {
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: var(--white);
  border-radius: 1px;
}
.menu-btn .lines span:nth-child(1) { top: 2px; }
.menu-btn .lines span:nth-child(2) { top: 50%; transform: translateY(-50%); width: 12px; }
.menu-btn .lines span:nth-child(3) { bottom: 2px; }

/* ============= MENU OVERLAY ============= */
.menu-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  opacity: 0;
  visibility: hidden;
  z-index: 100;
  transition: opacity var(--transition), visibility var(--transition);
  backdrop-filter: blur(4px);
}
.menu-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.menu-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(440px, 100%);
  background: var(--bg);
  border-left: 1px solid var(--border);
  z-index: 101;
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.menu-panel.is-open { transform: translateX(0); }

.menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem var(--pad-x);
  border-bottom: 1px solid var(--border);
}
.menu-close {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border-2);
  color: var(--text);
  transition: background var(--transition), border-color var(--transition);
}
.menu-close:hover { background: var(--bg-elev); border-color: var(--border-strong); }
.menu-close svg { width: 14px; height: 14px; }

.menu-nav {
  padding: 1.5rem var(--pad-x) 1rem;
  flex: 1;
}
.menu-section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1rem;
  margin-top: 1.5rem;
}
.menu-section-title:first-child { margin-top: 0; }

.menu-list { display: flex; flex-direction: column; }
.menu-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.85rem 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  transition: color var(--transition), padding-left var(--transition);
}
.menu-list a:hover { color: var(--white); padding-left: 0.6rem; }
.menu-list a.active { color: var(--white); }
.menu-list a .num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.menu-foot {
  padding: 1.5rem var(--pad-x) 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.menu-foot .contact-line {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.menu-foot .contact-line svg { width: 14px; height: 14px; color: var(--text-muted); }

/* ============= BUTTONS ============= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.96rem;
  letter-spacing: 0.01em;
  border-radius: 6px;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn-primary {
  background: var(--white);
  color: var(--black);
}
.btn-primary:hover { opacity: 0.88; }

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: var(--border-strong);
}
.btn-outline:hover { background: var(--bg-elev); border-color: var(--white); }

.btn-ghost {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-elev); border-color: var(--border-strong); color: var(--white); }

.btn-sm {
  padding: 0.65rem 1.1rem;
  font-size: 0.86rem;
}

.btn-block { width: 100%; }

/* ============= HERO ============= */
.hero {
  position: relative;
  padding: clamp(4rem, 10vw, 8rem) 0 clamp(4rem, 8vw, 6rem);
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.hero-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.hero-meta .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: #4ade80;
  border-radius: 50%;
  margin-right: 0.5rem;
  vertical-align: middle;
  box-shadow: 0 0 8px #4ade80;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-size: clamp(1.85rem, 8vw, 6.2rem);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin-bottom: 1.6rem;
  word-break: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}
.hero-title .accent {
  display: inline-block;
  color: var(--text-muted);
  position: relative;
}

.hero-sub {
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  color: var(--text-2);
  max-width: 56ch;
  line-height: 1.5;
  margin-bottom: clamp(2rem, 4vw, 2.8rem);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.hero-cta .btn { padding: 1.1rem 1.7rem; font-size: 1rem; }

.hero-foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--border-2);
}
@media (min-width: 720px) {
  .hero-foot { grid-template-columns: repeat(4, 1fr); }
}
.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.hero-stat .val {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}
.hero-stat .lbl {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ----------- page hero (smaller) ----------- */
.page-hero {
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4rem);
  position: relative;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  margin-bottom: 1.2rem;
}
.page-hero p {
  color: var(--text-2);
  max-width: 60ch;
  font-size: 1.05rem;
}
.page-crumbs {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.4rem;
}
.page-crumbs a:hover { color: var(--text); }

/* ============= SECTIONS ============= */
.section {
  padding: clamp(4rem, 8vw, 6.5rem) 0;
  position: relative;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  flex-wrap: wrap;
}
.section-head .text { max-width: 60ch; }
.section-head h2 { margin-top: 0.6rem; }
.section-head p { color: var(--text-2); margin-top: 0.8rem; line-height: 1.55; }

/* ============= SERVICES GRID (homepage) ============= */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
}

.service-tile {
  display: flex;
  flex-direction: column;
  padding: 2rem 1.8rem;
  background: var(--bg-2);
  position: relative;
  min-height: 240px;
  transition: background var(--transition);
}
.service-tile:hover { background: var(--bg-elev); }
.service-tile:hover .tile-arrow { transform: translate(4px, -4px); }

.tile-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 2.2rem;
}
.service-tile h3 {
  font-size: 1.35rem;
  margin-bottom: 0.7rem;
  letter-spacing: -0.02em;
}
.service-tile p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
  margin-bottom: auto;
}
.tile-arrow {
  position: absolute;
  top: 1.8rem;
  right: 1.8rem;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border-2);
  color: var(--text);
  transition: transform var(--transition), background var(--transition), color var(--transition);
}
.service-tile:hover .tile-arrow { background: var(--white); color: var(--black); border-color: var(--white); }

/* ============= SERVICE LIST (subpages) ============= */
.service-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 720px) {
  .service-list { grid-template-columns: repeat(2, 1fr); }
}

.service-row {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--transition), background var(--transition);
}
.service-row:hover { border-color: var(--border-strong); background: var(--bg-elev); }
.service-row .row-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}
.service-row h3 {
  font-size: 1.18rem;
  font-weight: 600;
  font-family: var(--font-display);
  margin-bottom: 0.3rem;
}
.service-row p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}
.service-row .row-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: auto;
  padding-top: 0.5rem;
}

/* ============= CATEGORY SECTION (services overview) ============= */
.category-block {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}
.category-block:first-of-type { border-top: none; padding-top: 0.5rem; }
.category-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.category-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
}
.category-head .cat-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}
.category-head .cat-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.category-head .cat-link:hover { color: var(--white); }

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.95rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--text-2);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.chip-list a:hover {
  background: var(--bg-elev);
  border-color: var(--border-strong);
  color: var(--white);
}
.chip-list a svg { width: 13px; height: 13px; }

/* ============= FEATURES (why us) ============= */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 720px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(4, 1fr); }
}

.feature {
  padding: 1.8rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  position: relative;
}
.feature .ico {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--bg-elev);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  margin-bottom: 1.3rem;
  color: var(--white);
}
.feature .ico svg { width: 20px; height: 20px; }
.feature h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}
.feature p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ============= CTA BLOCK ============= */
.cta-block {
  margin-top: 1rem;
  padding: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg-3) 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 50%;
  height: 200%;
  background: radial-gradient(circle at center, var(--grid-line), transparent 70%);
  pointer-events: none;
}
@media (min-width: 860px) {
  .cta-block { grid-template-columns: 1.4fr 1fr; }
}
.cta-block h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin-bottom: 0.85rem;
}
.cta-block p { color: var(--text-2); }
.cta-block .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ============= CONTACT PAGE ============= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1rem;
}
@media (min-width: 720px) {
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
}
.contact-card {
  padding: 2rem;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.contact-card .lbl {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.contact-card .val {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: -0.01em;
}
.contact-card .hint {
  color: var(--text-muted);
  font-size: 0.92rem;
}
.contact-card .actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.8rem;
  flex-wrap: wrap;
}

/* ============= FOOTER ============= */
.site-footer {
  margin-top: 4rem;
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 820px) {
  .footer-top { grid-template-columns: 2fr 1fr 1fr; }
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  max-width: 45ch;
  margin-top: 0.9rem;
  line-height: 1.55;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 1rem;
}
.footer-col ul li { margin-bottom: 0.55rem; }
.footer-col a {
  color: var(--text-2);
  font-size: 0.92rem;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

/* developer credit */
.dev-credit {
  width: 100%;
  padding-top: 1rem;
  margin-top: 0.5rem;
  border-top: 1px dashed var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-align: center;
  opacity: 0.7;
  transition: opacity var(--transition);
}
.dev-credit:hover { opacity: 1; }
.dev-credit a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: color var(--transition), border-color var(--transition);
}
.dev-credit a:hover {
  color: var(--white);
  border-color: var(--white);
}
.menu-foot .dev-credit {
  border-top: 1px dashed var(--border);
  margin-top: 1rem;
  padding-top: 1rem;
  text-align: left;
}

/* ============= FLOATING ACTION (mobile) ============= */
.float-actions {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 40;
  display: flex;
  gap: 0.6rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}
.float-actions.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--white);
  color: var(--black);
  box-shadow: 0 10px 30px -8px rgba(0,0,0,0.35);
}
.float-btn.call { background: var(--bg-elev); color: var(--white); border: 1px solid var(--border-strong); }
.float-btn svg { width: 22px; height: 22px; }

/* ============= THEME TOGGLE ============= */
.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--white);
}
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
.menu-foot .theme-toggle {
  width: 100%;
  height: auto;
  border-radius: 12px;
  padding: 0.85rem 1.1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.theme-toggle .label-light, .theme-toggle .label-dark { display: none; }
.menu-foot .theme-toggle .label-light { display: inline; }
.menu-foot .theme-toggle .label-dark { display: none; }
[data-theme="dark"] .menu-foot .theme-toggle .label-light { display: none; }
[data-theme="dark"] .menu-foot .theme-toggle .label-dark { display: inline; }

/* ============= SCROLL TO TOP (mobile) ============= */
.scroll-top {
  position: fixed;
  left: 1rem;
  bottom: 1rem;
  z-index: 40;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: none;
  place-items: center;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border-strong);
  box-shadow: 0 10px 30px -8px rgba(0,0,0,0.35);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition), color var(--transition);
}
.scroll-top.show {
  opacity: 1;
  transform: translateY(0);
}
.scroll-top:hover {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}
.scroll-top svg { width: 20px; height: 20px; }
@media (max-width: 860px) {
  .scroll-top { display: grid; }
}

/* ============= MOBILE OVERRIDES ============= */
@media (max-width: 720px) {
  .hero-meta { display: none; }
  .hero-foot { display: none; }
  .hero { padding-top: clamp(2rem, 6vw, 3rem); padding-bottom: clamp(2.5rem, 7vw, 4rem); }
  .hero-title { font-size: clamp(1.85rem, 9.5vw, 3rem); }
  .hero-cta { margin-bottom: 0; }
}

/* ============= ANIMATIONS ============= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up {
  opacity: 0;
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.fade-up.d1 { animation-delay: 0.08s; }
.fade-up.d2 { animation-delay: 0.16s; }
.fade-up.d3 { animation-delay: 0.24s; }
.fade-up.d4 { animation-delay: 0.32s; }
.fade-up.d5 { animation-delay: 0.40s; }

/* ============= UTILITY ============= */
.muted { color: var(--text-muted); }
.dim { color: var(--text-dim); }
.mono { font-family: var(--font-mono); }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}