/*
Theme Name: IAMpulse
Theme URI: https://iampulse.mx
Author: IAMpulse
Author URI: https://iampulse.mx
Description: Tema corporativo de IAMpulse — sitio one-page para PYMEs mexicanas que buscan adoptar inteligencia artificial. Incluye Customizer integrado para editar textos, contactos y estadísticas sin tocar código, formulario de contacto AJAX con honeypot anti-spam y diseño 100% responsive.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: iampulse
Tags: one-page, business, custom-colors, custom-menu, custom-logo, featured-images, threaded-comments, translation-ready
*/

/* ─────────────────────────────────────────
   IAMpulse · style.css
   ───────────────────────────────────────── */

/* ── TOKENS ── */
:root {
  --blue:       #185FA5;
  --blue-deep:  #0C447C;
  --blue-lite:  #E6F1FB;
  --blue-mid:   #85B7EB;
  --night:      #1A1A2E;
  --night-2:    #1E2F4A;
  --off-white:  #F7F8FA;
  --white:      #FFFFFF;
  --gray:       #555555;
  --gray-lt:    #999999;
  --border:     #E0E8F0;

  --font: 'Inter', Arial, Helvetica, sans-serif;
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --shadow-card: 0 2px 16px rgba(24, 95, 165, 0.08);
  --shadow-hover: 0 8px 32px rgba(24, 95, 165, 0.18);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-w: 1200px;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--off-white); color: var(--gray); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }
input, textarea { font-family: var(--font); }
ul { list-style: none; }

/* ── CONTAINER ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
}
@media (max-width: 768px) { .container { padding: 0 20px; } }

/* ── LOGO ── */
.logo { display: inline-flex; align-items: baseline; gap: 0; }
.logo-iam   { font-size: 1.25rem; font-weight: 700; color: var(--blue); letter-spacing: -0.5px; line-height: 1; }
.logo-pulse { font-size: 1.25rem; font-weight: 400; color: var(--night); letter-spacing: -0.5px; line-height: 1; }
.logo-dot   { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--blue); margin-left: 2px; margin-bottom: 2px; vertical-align: baseline; flex-shrink: 0; }
.logo-footer .logo-iam   { font-size: 1.1rem; color: var(--blue-mid); }
.logo-footer .logo-pulse { font-size: 1.1rem; color: rgba(255,255,255,0.75); }
.logo-footer .logo-dot   { background: var(--blue-mid); }

/* ── EYEBROW ── */
.eyebrow {
  font-size: 0.688rem;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.eyebrow-light { color: var(--blue-mid); }

/* ── SECTION HEADER ── */
.section-header { margin-bottom: 3rem; }
.section-header h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; color: var(--night); line-height: 1.25; margin-bottom: 12px; }
.section-sub { font-size: 0.938rem; color: var(--gray); max-width: 500px; }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover { background: var(--blue-deep); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(24,95,165,0.3); }

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--blue-mid);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(133,183,235,0.4);
  transition: background var(--transition), border-color var(--transition);
}
.btn-outline:hover { background: rgba(133,183,235,0.08); border-color: var(--blue-mid); }

/* ── REVEAL ANIMATION ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ──────────────────────────────────────────
   NAVIGATION
────────────────────────────────────────── */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow var(--transition);
}
#nav.scrolled { box-shadow: 0 1px 0 var(--border); }

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { font-size: 0.875rem; color: var(--gray); font-weight: 500; transition: color var(--transition); }
.nav-links a:not(.nav-cta):hover { color: var(--blue); }
.nav-cta {
  background: var(--blue);
  color: var(--white) !important;
  font-size: 0.813rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition) !important;
}
.nav-cta:hover { background: var(--blue-deep) !important; transform: translateY(-1px); }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--night); border-radius: 2px; transition: var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 1rem 48px 1.5rem;
  gap: 1rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 1rem; color: var(--gray); font-weight: 500; }
.mobile-menu .nav-cta { width: fit-content; }

@media (max-width: 768px) {
  .nav-inner { padding: 0 20px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { padding: 1rem 20px 1.5rem; }
}

/* ──────────────────────────────────────────
   HERO
────────────────────────────────────────── */
#hero {
  background: var(--night);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-bg { position: absolute; inset: 0; pointer-events: none; }

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}
.hero-orb-1 {
  width: 500px; height: 500px;
  right: -100px; top: -100px;
  background: radial-gradient(circle, rgba(24,95,165,0.35) 0%, transparent 70%);
  animation: orbFloat 8s ease-in-out infinite;
}
.hero-orb-2 {
  width: 300px; height: 300px;
  right: 200px; bottom: -60px;
  background: radial-gradient(circle, rgba(12,68,124,0.25) 0%, transparent 70%);
  animation: orbFloat 10s ease-in-out infinite reverse;
}
@keyframes orbFloat {
  0%, 100% { transform: translateY(0px) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(24,95,165,0.2);
  border: 1px solid rgba(133,183,235,0.25);
  color: var(--blue-mid);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 1.5rem;
  animation: fadeInDown 0.6s ease both;
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-mid);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
  max-width: 680px;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.7s 0.1s ease both;
}
.hero-h1 em { color: var(--blue-mid); font-style: normal; }

.hero-sub {
  font-size: 1.063rem;
  color: #7799BB;
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.7s 0.2s ease both;
}

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  animation: fadeInUp 0.7s 0.3s ease both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.7s 0.4s ease both;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.stat-val { display: block; font-size: 1.75rem; font-weight: 700; color: var(--blue-mid); line-height: 1; }
.stat-label { display: block; font-size: 0.75rem; color: #445566; letter-spacing: 0.04em; margin-top: 4px; }
.stat-div { width: 1px; height: 36px; background: rgba(255,255,255,0.08); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ──────────────────────────────────────────
   SERVICIOS
────────────────────────────────────────── */
#servicios {
  background: var(--white);
  padding: 100px 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.svc-card {
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.svc-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }

.svc-featured {
  background: var(--blue);
  border-color: var(--blue);
}
.svc-featured-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

.svc-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: #2263A5;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.svc-featured .svc-icon { background: rgba(255,255,255,0.18); }

.svc-card h3 { font-size: 1rem; font-weight: 700; color: var(--night); margin-bottom: 8px; }
.svc-featured h3 { color: var(--white); }
.svc-card p { font-size: 0.875rem; color: var(--gray); line-height: 1.65; margin-bottom: 1rem; }
.svc-featured p { color: #B5D4F4; }

.svc-tag {
  display: inline-block;
  font-size: 0.688rem;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-lite);
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  margin-left: 1px;
}
.svc-featured .svc-tag { color: var(--white); background: rgba(255,255,255,0.2); }

.fase-n { font-size: 22px; font-weight: 700; color: white; line-height: 1; }

@media (max-width: 768px) { .services-grid { grid-template-columns: 1fr; } }
@media (min-width: 769px) and (max-width: 1024px) { .services-grid { grid-template-columns: 1fr 1fr; } }

/* ──────────────────────────────────────────
   PROCESO
────────────────────────────────────────── */
#proceso {
  background: var(--off-white);
  padding: 100px 0;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.step {
  text-align: center;
  padding: 0 1rem;
  position: relative;
}

.step-num {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue);
  position: relative;
  z-index: 2;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.step-num.active { background: var(--blue); color: var(--white); box-shadow: 0 0 0 6px var(--blue-lite); }

.step-connector {
  position: absolute;
  top: 26px;
  left: calc(50% + 26px);
  right: calc(-50% + 26px);
  height: 2px;
  background: var(--border);
  z-index: 1;
}
.step:last-child .step-connector { display: none; }

.step h4 { font-size: 0.938rem; font-weight: 700; color: var(--night); margin-bottom: 8px; }
.step p { font-size: 0.813rem; color: var(--gray); line-height: 1.6; }

@media (max-width: 768px) {
  .steps { grid-template-columns: 1fr; gap: 2rem; }
  .step-connector { display: none; }
}

/* ──────────────────────────────────────────
   NOSOTROS
────────────────────────────────────────── */
#nosotros {
  background: var(--white);
  padding: 100px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-left h2 { font-size: clamp(1.5rem, 2.5vw, 1.875rem); font-weight: 700; color: var(--night); line-height: 1.3; margin-bottom: 14px; }
.about-left .section-sub { margin-bottom: 2rem; }

.founders { display: flex; flex-direction: column; gap: 14px; }
.founder-card {
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: box-shadow var(--transition);
  height: 160px;
}
.founder-card:hover { box-shadow: var(--shadow-card); }
.founder-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--blue-lite);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--blue);
  flex-shrink: 0;
}
.founder-name { font-size: 0.938rem; font-weight: 700; color: var(--night); margin-bottom: 2px; }
.founder-role { font-size: 0.75rem; color: var(--blue); margin-bottom: 6px; }
.founder-bio { font-size: 0.813rem; color: var(--gray); line-height: 1.6; }

/* CONCEPT CARD */
.concept-card {
  background: var(--night);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.concept-block {
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
}
.cb1 { background: rgba(24,95,165,0.2); border-left: 3px solid var(--blue); }
.cb2 { background: rgba(12,68,124,0.25); border-left: 3px solid var(--blue-deep); }

.concept-logo {
  display: flex;
  align-items: baseline;
  margin-bottom: 10px;
  line-height: 1;
}
.c-iam   { font-size: 1.5rem; font-weight: 700; color: var(--blue-mid); letter-spacing: -0.5px; }
.c-apo   { font-size: 1.5rem; font-weight: 700; color: rgba(133,183,235,0.3); letter-spacing: -0.5px; }
.c-fade  { color: rgba(133,183,235,0.2) !important; }
.c-pulse { font-size: 1.5rem; font-weight: 400; color: rgba(255,255,255,0.8); letter-spacing: -0.5px; }
.c-space { display: inline-block; width: 4px; }
.c-dot-sm {
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-mid);
  margin-left: 2px;
  margin-bottom: 2px;
  vertical-align: baseline;
}

.concept-block h4 { font-size: 0.875rem; font-weight: 700; color: var(--white); margin-bottom: 6px; }
.concept-block p { font-size: 0.813rem; color: #7799BB; line-height: 1.65; }
.concept-block p strong { color: var(--blue-mid); font-weight: 600; }

.concept-stats {
  display: flex;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 1rem;
}
.cstat { flex: 1; text-align: center; }
.cstat:not(:last-child) { border-right: 1px solid rgba(255,255,255,0.06); }
.cstat-val { display: block; font-size: 1.5rem; font-weight: 700; color: var(--blue-mid); line-height: 1; }
.cstat-label { display: block; font-size: 0.688rem; color: #445566; text-transform: uppercase; letter-spacing: 0.06em; margin-top: 4px; }

@media (max-width: 1024px) { .about-grid { grid-template-columns: 1fr; } }

/* ──────────────────────────────────────────
   CONTACTO
────────────────────────────────────────── */
#contacto {
  background: var(--night);
  padding: 100px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 14px;
}
.contact-sub { font-size: 0.938rem; color: #7799BB; line-height: 1.7; margin-bottom: 2rem; }

.contact-details { display: flex; flex-direction: column; gap: 12px; }
.contact-detail { display: flex; align-items: center; gap: 10px; }
.contact-detail a { font-size: 0.875rem; color: var(--blue-mid); transition: color var(--transition); }
.contact-detail a:hover { color: var(--white); }

/* FORM */
.contact-form-wrap {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 2rem;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.813rem; font-weight: 600; color: var(--night); margin-bottom: 6px; }
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.875rem;
  color: var(--night);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(24,95,165,0.1);
}
.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #E24B4A;
}
.form-error { display: block; font-size: 0.75rem; color: #E24B4A; margin-top: 4px; min-height: 16px; }

.btn-submit {
  width: 100%;
  background: var(--blue);
  color: var(--white);
  font-size: 0.938rem;
  font-weight: 700;
  padding: 13px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  margin-top: 4px;
}
.btn-submit:hover { background: var(--blue-deep); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(24,95,165,0.25); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* WA (WhatsApp) FORM */
.wa-form-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.wa-icon-badge {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: var(--blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}
.wa-form-title { font-size: 1rem; font-weight: 700; color: var(--night); margin-bottom: 2px; }
.wa-form-sub   { font-size: 0.813rem; color: #6B7B8F; line-height: 1.5; }

.btn-whatsapp {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--blue);
  color: var(--white);
  font-size: 0.938rem;
  font-weight: 700;
  padding: 13px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  margin-top: 4px;
}
.btn-whatsapp:hover    { background: var(--blue-deep); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(24,95,165,0.25); }
.btn-whatsapp:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.form-success {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #EAF7F2;
  border: 1px solid #B5E5D4;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.875rem;
  color: #0F6E56;
  margin-top: 12px;
}
.form-error-msg {
  background: #FDECEA;
  border: 1px solid #F5C0BE;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.875rem;
  color: #A32D2D;
  margin-top: 12px;
}

@media (max-width: 1024px) { .contact-grid { grid-template-columns: 1fr; } }

/* ──────────────────────────────────────────
   FOOTER
────────────────────────────────────────── */
#footer {
  background: #111827;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-top: 3rem;
  padding-bottom: 3rem;
}
.footer-tagline { font-size: 0.813rem; color: #445566; margin: 8px 0; }
.footer-email { font-size: 0.813rem; }
.footer-email a { color: var(--blue-mid); transition: color var(--transition); }
.footer-email a:hover { color: var(--white); }
.footer-col-title { font-size: 0.688rem; font-weight: 700; color: rgba(255,255,255,0.4); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 12px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 0.813rem; color: #445566; transition: color var(--transition); }
.footer-col a:hover { color: var(--blue-mid); }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.04); }
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  padding-bottom: 1rem;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom-inner p { font-size: 0.75rem; color: #334455; }

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* ──────────────────────────────────────────
   SCROLL TO TOP (optional UX)
────────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(24,95,165,0.35);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
  z-index: 900;
  border: none;
  cursor: pointer;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scroll-top:hover { background: var(--blue-deep); }

/* ── FOCUS STYLES (accessibility) ── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 3px;
}