/* ============================================
   OPALOK — Diseño Web & SEO Madrid
   Brand: Black + Metallic Blue Chrome
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ─── Variables ─────────────────────────────── */
:root {
  --bg-0:   #030408;
  --bg-1:   #070A14;
  --bg-2:   #0C0F1E;
  --bg-card:       rgba(12, 15, 30, 0.85);
  --bg-card-hover: rgba(18, 24, 48, 0.95);

  --blue-100: #C8E8FF;
  --blue-200: #89CFF0;
  --blue-300: #4A9EFF;
  --blue-400: #2B7FD4;
  --blue-500: #1A5AA0;
  --blue-glow:        rgba(74, 158, 255, 0.22);
  --blue-glow-strong: rgba(74, 158, 255, 0.5);

  --text-100:  #EBF4FF;
  --text-200:  #A8C0D6;
  --text-300:  #6A8A9F;
  --text-muted:#3A5060;

  --border:       rgba(74, 158, 255, 0.12);
  --border-hover: rgba(74, 158, 255, 0.38);

  --chrome-text: linear-gradient(135deg, #C8E8FF 0%, #4A9EFF 30%, #FFFFFF 55%, #89CFF0 75%, #4A9EFF 100%);

  --ff-head: 'Space Grotesk', sans-serif;
  --ff-body: 'Inter', sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 40px;

  --t: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 40px rgba(74,158,255,0.15), 0 8px 32px rgba(0,0,0,0.7);
}

/* ─── Reset ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--ff-body);
  background: var(--bg-0);
  color: var(--text-100);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; }

/* ─── Typography ─────────────────────────────── */
h1,h2,h3,h4 { font-family: var(--ff-head); font-weight: 600; line-height: 1.15; }

.chrome-text {
  background: var(--chrome-text);
  background-size: 250% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 5s linear infinite;
}
@keyframes shimmer {
  0%   { background-position: 0%   center; }
  100% { background-position: 250% center; }
}

.label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue-300);
  display: block;
}

/* ─── Layout ─────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 4rem);
}
.section      { padding: clamp(5rem, 10vw, 9rem) 0; }
.section--sm  { padding: clamp(3rem, 6vw, 5rem) 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }

/* ─── Navigation ─────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.375rem 0;
  transition: background var(--t), padding var(--t), border-color var(--t);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(3, 4, 8, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 0.9rem 0;
  border-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; }
.nav__logo {
  font-family: var(--ff-head);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--chrome-text);
  background-size: 250% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 7s linear infinite;
  letter-spacing: -0.02em;
  margin-right: 2rem;
  padding: 0.2rem 0;
}
.nav__links { display: flex; align-items: center; gap: 2.25rem; }
.nav__link {
  font-size: 0.875rem; font-weight: 500;
  color: var(--text-300);
  transition: color var(--t);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--blue-300);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--t);
}
.nav__link:hover           { color: var(--text-100); }
.nav__link:hover::after,
.nav__link.active::after   { transform: scaleX(1); }
.nav__link.active          { color: var(--text-100); }

.nav__cta {
  padding: 0.575rem 1.375rem;
  background: transparent;
  border: 1px solid var(--blue-300);
  border-radius: 100px;
  font-size: 0.8125rem; font-weight: 600;
  color: var(--blue-300);
  cursor: pointer;
  transition: var(--t);
  margin-left: 2rem;
}
.nav__cta:hover {
  background: var(--blue-300);
  color: var(--bg-0);
  box-shadow: 0 0 22px var(--blue-glow-strong);
}
.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; background: none; border: none;
}
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--text-100); transition: var(--t); }

/* ─── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 100px;
  font-family: var(--ff-head); font-size: 0.9375rem; font-weight: 600;
  cursor: pointer; transition: var(--t); border: none; text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-300));
  color: #fff;
  box-shadow: 0 4px 22px rgba(74,158,255,0.32);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(74,158,255,0.52);
}
.btn-outline {
  background: transparent; color: var(--text-100);
  border: 1px solid rgba(74,158,255,0.3);
}
.btn-outline:hover {
  border-color: var(--blue-300); color: var(--blue-300);
  box-shadow: 0 0 22px var(--blue-glow);
  transform: translateY(-2px);
}
.btn-ghost { background: transparent; color: var(--blue-300); padding: 0; }
.btn-ghost:hover { color: var(--blue-100); }

/* ─── Cards ───────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--t);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-300), transparent);
  opacity: 0; transition: opacity var(--t);
}
.card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}
.card:hover::before { opacity: 1; }

.card__icon {
  width: 50px; height: 50px;
  background: rgba(74,158,255,0.09);
  border: 1px solid rgba(74,158,255,0.2);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 1.25rem;
}
.card__title {
  font-family: var(--ff-head); font-size: 1.0625rem; font-weight: 600;
  color: var(--text-100); margin-bottom: 0.5rem;
}
.card__desc { font-size: 0.875rem; color: var(--text-300); line-height: 1.65; }
.card__tag {
  display: inline-block; margin-top: 1rem;
  padding: 0.2rem 0.75rem;
  background: rgba(74,158,255,0.1);
  border: 1px solid rgba(74,158,255,0.2);
  border-radius: 100px;
  font-size: 0.7rem; font-weight: 600;
  color: var(--blue-300);
}
.card__num {
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.12em; color: var(--blue-500);
  font-family: var(--ff-head); margin-bottom: 0.375rem;
}

/* ─── Hero ────────────────────────────────────── */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden; background: var(--bg-0);
}
#hero-canvas {
  position: absolute; inset: 0; z-index: 0;
  width: 100% !important; height: 100% !important;
}
.hero__content {
  position: relative; z-index: 10;
  max-width: 700px;
  margin: 0 auto;
  text-align: left;
  padding-left: 1rem;
}
.hero__badge {
  display: inline-flex; align-items: center; gap: 0.625rem;
  padding: 0.375rem 1rem;
  background: rgba(74,158,255,0.07);
  border: 1px solid rgba(74,158,255,0.2);
  border-radius: 100px;
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--blue-300); margin-bottom: 2rem;
}
.hero__badge i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--blue-300); flex-shrink: 0;
  animation: blink 2s ease infinite;
}
@keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0.3;} }

.hero__title {
  font-size: clamp(4.5rem, 13vw, 11rem);
  font-weight: 700; letter-spacing: -0.04em; line-height: 0.88;
  margin-bottom: 1.625rem;
}
.hero__sub {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--text-200); max-width: 520px;
  line-height: 1.75; margin: 0 0 2.5rem;
}
.hero__ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero__scroll {
  position: absolute; bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  z-index: 10;
}
.hero__scroll span {
  font-size: 0.65rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--text-muted);
}
.scroll-line {
  width: 1px; height: 44px;
  background: linear-gradient(to bottom, var(--blue-300), transparent);
  animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown {
  0%   { opacity: 0; transform: scaleY(0) translateY(-100%); }
  40%  { opacity: 1; }
  100% { opacity: 0; transform: scaleY(1) translateY(0); }
}

/* ─── Section Header ─────────────────────────── */
.section-header { text-align: center; max-width: 660px; margin: 0 auto 4rem; }
.section-header .label  { margin-bottom: 0.75rem; }
.section-header h2 { font-size: clamp(2rem, 4vw, 3.25rem); margin-bottom: 1rem; }
.section-header p  { font-size: 1.0625rem; color: var(--text-200); line-height: 1.75; }

/* ─── Stats ───────────────────────────────────── */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--border); gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md); overflow: hidden;
}
.stat { background: var(--bg-1); padding: 2.5rem 1.5rem; text-align: center; }
.stat__num {
  font-family: var(--ff-head); font-size: clamp(2rem, 4vw, 3rem); font-weight: 700;
  background: var(--chrome-text); background-size: 250% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; animation: shimmer 5s linear infinite;
}
.stat__lbl { font-size: 0.8125rem; color: var(--text-300); margin-top: 0.25rem; }

/* ─── Process ─────────────────────────────────── */
.process-steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem; position: relative;
}
.process-steps::before {
  content: ''; position: absolute;
  top: 27px; left: 12%; right: 12%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
}
.step__num {
  width: 54px; height: 54px; border-radius: 50%;
  background: var(--bg-2); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--ff-head); font-size: 0.875rem; font-weight: 700;
  color: var(--blue-300); margin-bottom: 1.5rem; position: relative; z-index: 1;
}
.step__title { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.step__desc  { font-size: 0.85rem; color: var(--text-300); line-height: 1.65; }

/* ─── Tabs ────────────────────────────────────── */
.tabs-wrap {
  display: flex; gap: 0;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 100px; padding: 0.3rem;
  width: fit-content; margin: 0 auto 3rem;
}
.tab-btn {
  padding: 0.6rem 1.75rem; border-radius: 100px; border: none;
  background: transparent; color: var(--text-300);
  font-family: var(--ff-head); font-size: 0.875rem; font-weight: 500;
  cursor: pointer; transition: var(--t);
}
.tab-btn.active {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-400));
  color: #fff;
  box-shadow: 0 2px 14px rgba(74,158,255,0.28);
}
.tab-pane { display: none; }
.tab-pane.active { display: grid; }

/* ─── Service Detail Cards ────────────────────── */
.service-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--t);
  overflow: hidden; position: relative;
}
.service-detail::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-300), transparent);
  opacity: 0; transition: opacity var(--t);
}
.service-detail:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.service-detail:hover::after { opacity: 1; }
.sd__icon { font-size: 2rem; margin-bottom: 1rem; }
.sd__title { font-family: var(--ff-head); font-size: 1.0625rem; font-weight: 600; margin-bottom: 0.5rem; }
.sd__desc  { font-size: 0.85rem; color: var(--text-300); line-height: 1.65; margin-bottom: 1rem; }
.sd__list  { list-style: none; padding: 0; }
.sd__list li {
  font-size: 0.8125rem; color: var(--text-300);
  padding: 0.25rem 0; padding-left: 1rem; position: relative;
}
.sd__list li::before { content: '→'; position: absolute; left: 0; color: var(--blue-400); font-size: 0.75rem; }

/* ─── Portfolio ───────────────────────────────── */
.portfolio-filters { display: flex; gap: 0.625rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.filter-btn {
  padding: 0.45rem 1.125rem;
  border-radius: 100px; border: 1px solid var(--border);
  background: transparent; color: var(--text-300);
  font-size: 0.8125rem; cursor: pointer; transition: var(--t);
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--blue-300); color: var(--blue-300);
  background: rgba(74,158,255,0.06);
}
.portfolio-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
}
.portfolio-item {
  border-radius: var(--radius-md); overflow: hidden;
  background: var(--bg-2); border: 1px solid var(--border);
  aspect-ratio: 16/10; position: relative; cursor: pointer;
}
.portfolio-item__mock {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--bg-2), var(--bg-1));
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; transition: transform 0.5s ease;
}
.portfolio-item:hover .portfolio-item__mock { transform: scale(1.05); }
.portfolio-item__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(3,4,8,0.95), transparent 50%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.5rem; opacity: 0; transition: opacity var(--t);
}
.portfolio-item:hover .portfolio-item__overlay { opacity: 1; }
.pi__title { font-family: var(--ff-head); font-weight: 600; font-size: 0.9375rem; }
.pi__type  { font-size: 0.75rem; color: var(--blue-300); margin-top: 0.2rem; }

/* ─── CTA Band ────────────────────────────────── */
.cta-band {
  background: linear-gradient(135deg, rgba(26,90,160,0.18), rgba(74,158,255,0.08));
  border: 1px solid rgba(74,158,255,0.22);
  border-radius: var(--radius-xl); padding: clamp(3rem,6vw,6rem);
  text-align: center; position: relative; overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute; top: -60%; left: 50%; transform: translateX(-50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, rgba(74,158,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.cta-band h2 { font-size: clamp(1.75rem, 4vw, 3rem); margin-bottom: 1rem; }
.cta-band p  { color: var(--text-200); font-size: 1.0625rem; max-width: 540px; margin: 0 auto 2.5rem; line-height: 1.7; }
.cta-band__btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ─── Page Hero (inner) ───────────────────────── */
.page-hero {
  padding: clamp(7rem, 12vw, 10rem) 0 clamp(4rem, 6vw, 6rem);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 70% 80% at 50% 0%, rgba(74,158,255,0.1) 0%, transparent 65%);
  pointer-events: none;
}
.page-hero .label  { margin-bottom: 0.875rem; }
.page-hero h1      { font-size: clamp(2rem, 4vw, 3.25rem); margin-bottom: 1.25rem; letter-spacing: -0.02em; }
.page-hero p       { font-size: 1.125rem; color: var(--text-200); max-width: 580px; line-height: 1.75; }

/* ─── Contact ──────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 4rem; align-items: start; }
.contact-info__item {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: 1.25rem 0; border-bottom: 1px solid var(--border);
}
.ci-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: rgba(74,158,255,0.08); border: 1px solid rgba(74,158,255,0.18);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.ci-lbl   { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.2rem; }
.ci-val   { font-size: 0.9375rem; color: var(--text-100); font-weight: 500; }

.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.8rem; color: var(--text-300); margin-bottom: 0.45rem; font-weight: 500; }
.form-input, .form-textarea, .form-select {
  width: 100%; padding: 0.875rem 1.125rem;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-100); font-family: var(--ff-body);
  font-size: 0.9375rem; transition: var(--t); outline: none;
  -webkit-appearance: none;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--blue-300);
  box-shadow: 0 0 0 3px rgba(74,158,255,0.12);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 140px; }
.form-select option { background: var(--bg-2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ─── Footer ──────────────────────────────────── */
.footer { background: var(--bg-1); border-top: 1px solid var(--border); padding: 5rem 0 2.5rem; }
.footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem;
  padding-bottom: 3rem; border-bottom: 1px solid var(--border); margin-bottom: 2rem;
}
.footer__logo {
  font-family: var(--ff-head); font-size: 1.625rem; font-weight: 700;
  background: var(--chrome-text); background-size: 250% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; animation: shimmer 7s linear infinite;
  letter-spacing: -0.02em; margin-bottom: 0.875rem;
}
.footer__tagline { font-size: 0.875rem; color: var(--text-300); line-height: 1.65; max-width: 280px; }
.footer__col-title {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-100); margin-bottom: 1.25rem;
}
.footer__links { display: flex; flex-direction: column; gap: 0.625rem; }
.footer__link { font-size: 0.875rem; color: var(--text-300); transition: color var(--t); }
.footer__link:hover { color: var(--blue-300); }
.footer__nap { font-size: 0.8125rem; color: var(--text-300); line-height: 1.9; }
.footer__nap strong { color: var(--text-200); display: block; }
.footer__bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer__copy   { font-size: 0.8125rem; color: var(--text-muted); }
.footer__legal  { display: flex; gap: 1.5rem; }
.footer__legal a { font-size: 0.8125rem; color: var(--text-muted); transition: color var(--t); }
.footer__legal a:hover { color: var(--blue-300); }

/* ─── Glow Divider ────────────────────────────── */
.glow-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-400), var(--blue-300), var(--blue-400), transparent);
  opacity: 0.35;
}

/* ─── Highlights strip ────────────────────────── */
.highlights { display: flex; gap: 2rem; flex-wrap: wrap; }
.hl { display: flex; align-items: center; gap: 0.5rem; }
.hl__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--blue-300); }
.hl__text { font-size: 0.875rem; color: var(--text-300); }

/* ─── Fade-up reveal ──────────────────────────── */
.fade-up {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up.d1 { transition-delay: 0.1s; }
.fade-up.d2 { transition-delay: 0.2s; }
.fade-up.d3 { transition-delay: 0.3s; }
.fade-up.d4 { transition-delay: 0.4s; }

/* Noise grain overlay */
body::after {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 9998; opacity: 0.5;
}

/* ─── Responsive ──────────────────────────────── */
@media (max-width: 1100px) {
  .stats-grid, .grid-4, .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 800px) {
  .grid-2, .grid-3     { grid-template-columns: 1fr; }
  .contact-grid        { grid-template-columns: 1fr; }
  .portfolio-grid      { grid-template-columns: repeat(2, 1fr); }
  .nav__links          { display: none; }
  .nav__links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(3,4,8,0.98); backdrop-filter: blur(20px);
    padding: 1.5rem 2rem; border-bottom: 1px solid var(--border); gap: 1.5rem;
  }
  .nav__toggle  { display: flex; }
  .form-row     { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero__ctas   { flex-direction: column; align-items: flex-start; }
  .tabs-wrap    { flex-direction: column; border-radius: var(--radius-md); width: 100%; }
  .tab-btn      { border-radius: var(--radius-sm); text-align: center; }
}
@media (max-width: 480px) {
  .portfolio-grid { grid-template-columns: 1fr; }
  .stats-grid, .grid-4, .process-steps { grid-template-columns: 1fr; }
  .cta-band__btns { flex-direction: column; align-items: center; }
}