/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --color-primary:   #1a2e5a;
  --color-secondary: #2e75b6;
  --color-accent:    #e8a020;
  --color-bg:        #f8fafc;
  --color-surface:   #ffffff;
  --color-text:      #1e293b;
  --color-muted:     #64748b;
  --color-border:    #e2e8f0;
  --shadow-sm:       0 1px 3px rgba(0,0,0,.08);
  --shadow-md:       0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:       0 8px 32px rgba(0,0,0,.14);
  --radius:          12px;
  --radius-lg:       20px;
  --max-w:           1120px;
  --transition:      .25s cubic-bezier(.4,0,.2,1);
}

/* ── Reset & Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
       background: var(--color-bg); color: var(--color-text); line-height: 1.6; }
img { max-width: 100%; display: block; }
a { color: var(--color-secondary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Utilidades ────────────────────────────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--color-surface); }
.section-dark { background: var(--color-primary); color: #fff; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; color: var(--color-primary); margin-bottom: 12px; }
.section-dark .section-title { color: #fff; }
.section-sub  { font-size: 1.05rem; color: var(--color-muted); max-width: 600px; }
.section-dark .section-sub { color: rgba(255,255,255,.75); }
.text-center  { text-align: center; }
.text-center .section-sub { margin: 0 auto; }
.badge { display: inline-block; padding: 4px 12px; border-radius: 100px; font-size: .8rem; font-weight: 700; }
.badge-accent { background: var(--color-accent)20; color: var(--color-accent); border: 1px solid var(--color-accent)40; }

/* Animate on scroll */
.animate-on-scroll { opacity: 0; transform: translateY(24px); transition: opacity .5s, transform .5s; }
.animate-on-scroll.visible { opacity: 1; transform: none; }

/* ── Nav ───────────────────────────────────────────────────────────────────── */
nav.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; transition: background var(--transition), box-shadow var(--transition);
  background: transparent;
}
nav.site-nav.scrolled {
  background: rgba(26,46,90,.95);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  box-shadow: var(--shadow-md);
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { height: 36px; width: auto; }
.nav-logo span { font-weight: 800; font-size: 1.1rem; color: #fff; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { color: rgba(255,255,255,.85); font-weight: 500; font-size: .95rem; transition: color var(--transition); }
.nav-links a:hover { color: var(--color-accent); text-decoration: none; }
.nav-cta { background: var(--color-accent); color: var(--color-primary) !important; padding: 8px 20px; border-radius: 100px; font-weight: 700 !important; }
.nav-cta:hover { background: #f0b030; color: var(--color-primary) !important; }
#nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; }
@media (max-width: 768px) {
  #nav-toggle { display: block; }
  #nav-menu { display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--color-primary); flex-direction: column; padding: 20px; gap: 16px; }
  #nav-menu.open { display: flex; }
  #nav-menu .nav-links { flex-direction: column; gap: 16px; }
  #nav-menu .nav-links a { color: #fff; font-size: 1.05rem; }
}

/* ── Hero ──────────────────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0f1e3d 60%, #1a3a6b 100%);
  position: relative; overflow: hidden; padding: 120px 0 80px;
}
#hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(46,117,182,.25) 0%, transparent 60%);
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
@media (max-width: 768px) { .hero-inner { grid-template-columns: 1fr; text-align: center; } }
.hero-eyebrow { color: var(--color-accent); font-weight: 700; font-size: .9rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 16px; }
.hero-title { font-size: clamp(2rem, 4.5vw, 3.2rem); font-weight: 900; color: #fff; line-height: 1.15; margin-bottom: 20px; }
.hero-title em { color: var(--color-accent); font-style: normal; }
.hero-sub { font-size: 1.1rem; color: rgba(255,255,255,.75); max-width: 480px; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
@media (max-width: 768px) { .hero-actions { justify-content: center; } }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: 100px; font-weight: 700; font-size: .95rem; transition: all var(--transition); cursor: pointer; border: 2px solid transparent; }
.btn-primary { background: var(--color-accent); color: var(--color-primary); }
.btn-primary:hover { background: #f0b030; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(232,160,32,.4); text-decoration: none; }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn-outline:hover { background: rgba(255,255,255,.1); border-color: #fff; text-decoration: none; }
.btn-whatsapp { background: #25d366; color: #fff; font-size: 1rem; padding: 16px 32px; }
.btn-whatsapp:hover { background: #20ba5a; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,211,102,.4); text-decoration: none; }

/* Mockup Telegram */
.mockup-wrap { display: flex; justify-content: center; }
.mockup-phone { width: 260px; background: #17212b; border-radius: 24px; padding: 20px 14px; box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,255,255,.08); }
.mockup-header { display: flex; align-items: center; gap: 10px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,.08); margin-bottom: 12px; }
.mockup-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--color-secondary); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; }
.mockup-name { color: #fff; font-weight: 700; font-size: .9rem; }
.mockup-sub { color: rgba(255,255,255,.5); font-size: .75rem; }
.mockup-messages { min-height: 180px; display: flex; flex-direction: column; gap: 6px; }
.mockup-msg { padding: 8px 12px; border-radius: 10px; font-size: .78rem; line-height: 1.4; animation: slideIn .3s ease; max-width: 90%; }
.mockup-msg-in { background: #2b5278; color: #fff; align-self: flex-start; border-bottom-left-radius: 2px; }
@keyframes slideIn { from { opacity: 0; transform: translateX(-10px); } to { opacity: 1; transform: none; } }

/* ── El problema ───────────────────────────────────────────────────────────── */
.pain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-top: 48px; }
.pain-card { background: var(--color-surface); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); border-left: 4px solid var(--color-accent); }
.pain-icon { font-size: 2rem; margin-bottom: 12px; }
.pain-card h3 { font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.pain-card p { font-size: .9rem; color: var(--color-muted); }

/* ── Servicios ─────────────────────────────────────────────────────────────── */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 48px; }
.service-card { background: var(--color-surface); border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow-sm); transition: transform var(--transition), box-shadow var(--transition); }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.service-icon { width: 48px; height: 48px; background: linear-gradient(135deg, var(--color-primary), var(--color-secondary)); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 16px; }
.service-card h3 { font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.service-card p { font-size: .88rem; color: var(--color-muted); }

/* ── Cómo funciona ─────────────────────────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 32px; margin-top: 48px; }
.step { text-align: center; }
.step-num { width: 56px; height: 56px; background: var(--color-accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; font-weight: 900; color: var(--color-primary); margin: 0 auto 16px; }
.step h3 { font-size: 1.05rem; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.step p { color: var(--color-muted); font-size: .9rem; }

/* ── Novedades fiscales ────────────────────────────────────────────────────── */
#novedades-feed { display: grid; gap: 16px; margin-top: 40px; }
.novedad-card { background: var(--color-surface); border-radius: var(--radius); padding: 20px 24px; box-shadow: var(--shadow-sm); border-left: 3px solid var(--color-secondary); }
.novedad-urgente { border-left-color: #dc2626; }
.novedad-header { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.novedad-cat { padding: 3px 10px; border-radius: 100px; font-size: .75rem; font-weight: 700; }
.novedad-fecha { font-size: .78rem; color: var(--color-muted); margin-left: auto; }
.novedad-titulo { font-size: 1rem; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.novedad-cuerpo { font-size: .9rem; color: var(--color-muted); line-height: 1.55; }

/* ── Sobre el estudio ──────────────────────────────────────────────────────── */
.about-inner { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; align-items: center; }
@media (max-width: 768px) { .about-inner { grid-template-columns: 1fr; text-align: center; } }
.about-photo { width: 200px; height: 200px; border-radius: 50%; object-fit: cover; margin: 0 auto; border: 4px solid var(--color-accent); box-shadow: var(--shadow-md); }
.about-name { font-size: 1.3rem; font-weight: 800; color: var(--color-primary); margin-bottom: 4px; }
.about-title { color: var(--color-secondary); font-weight: 600; margin-bottom: 16px; }
.about-bio { color: var(--color-muted); font-size: .95rem; line-height: 1.7; }

/* ── FAQ ───────────────────────────────────────────────────────────────────── */
.faq-list { max-width: 700px; margin: 40px auto 0; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--color-surface); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.faq-question { width: 100%; background: none; border: none; padding: 18px 20px; text-align: left; font-size: 1rem; font-weight: 600; color: var(--color-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-question::after { content: '+'; font-size: 1.4rem; color: var(--color-accent); flex-shrink: 0; transition: transform var(--transition); }
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer-inner { padding: 0 20px 18px; color: var(--color-muted); font-size: .95rem; line-height: 1.65; }

/* ── CTA final ─────────────────────────────────────────────────────────────── */
.cta-box { text-align: center; background: linear-gradient(135deg, var(--color-primary), #1a3a6b); border-radius: var(--radius-lg); padding: 60px 32px; }
.cta-box h2 { color: #fff; font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; margin-bottom: 12px; }
.cta-box p { color: rgba(255,255,255,.75); margin-bottom: 28px; font-size: 1rem; }

/* ── Footer ────────────────────────────────────────────────────────────────── */
footer { background: var(--color-primary); color: rgba(255,255,255,.6); padding: 28px 20px; text-align: center; font-size: .88rem; }
footer a { color: rgba(255,255,255,.7); }
footer strong { color: #fff; }

/* ── Responsive ajustes ────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .section { padding: 56px 0; }
  .services-grid { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
}