/* ============================================================
   ADMAPA — styles.css
   Estilos globales del sitio web de Admapa Database Consulting
   ============================================================ */

:root {
    --black: #0a0a0f;
    --dark: #10101a;
    --card: #14141f;
    --border: #1e1e2e;
    --violet: #7c3aed;
    --violet-bright: #8b5cf6;
    --violet-glow: #a78bfa;
    --violet-dim: #3b1f6e;
    --white: #f8f8ff;
    --gray: #9898b0;
    --light: #c8c8e0;
    --mono: 'IBM Plex Mono', monospace;
    --serif: 'DM Serif Display', serif;
    --sans: 'Syne', sans-serif;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--black);
    color: var(--white);
    font-family: var(--sans);
    overflow-x: hidden;
    cursor: default;
  }

  /* ── NAV ── */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.2rem 5%;
    background: rgba(10,10,15,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(124,58,237,0.15);
    transition: all .3s;
  }

  nav.scrolled {
    padding: .9rem 5%;
    border-bottom-color: rgba(124,58,237,0.3);
  }

  .nav-logo {
    font-family: var(--sans);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -.01em;
    color: var(--white);
    text-decoration: none;
    display: flex; align-items: center; gap: .6rem;
  }

  .nav-links { display: flex; align-items: center; gap: 2.5rem; }

  .nav-links a {
    font-size: .82rem; font-weight: 600; letter-spacing: .08em;
    text-transform: uppercase; color: var(--gray); text-decoration: none;
    transition: color .2s;
  }
  .nav-links a:hover { color: var(--violet-glow); }

  .nav-cta {
    background: var(--violet) !important;
    color: #fff !important;
    padding: .55rem 1.3rem;
    border-radius: 4px;
    font-size: .82rem !important;
    font-weight: 700 !important;
    transition: background .2s, transform .15s !important;
  }
  .nav-cta:hover { background: var(--violet-bright) !important; transform: translateY(-1px); }

  .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
  .hamburger span { width: 22px; height: 2px; background: var(--white); border-radius: 2px; transition: all .3s; }

  /* ── SECTIONS BASE ── */
  section { padding: 6rem 5%; position: relative; }

  .container { max-width: 1140px; margin: 0 auto; }

  .label {
    font-family: var(--mono);
    font-size: .72rem; font-weight: 500;
    letter-spacing: .15em; text-transform: uppercase;
    color: var(--violet-glow);
    margin-bottom: 1.2rem;
    display: flex; align-items: center; gap: .6rem;
  }
  .label::before {
    content: ''; width: 20px; height: 1px;
    background: var(--violet-glow); flex-shrink: 0;
  }

  h2 {
    font-family: var(--serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400; line-height: 1.2;
    color: var(--white);
    margin-bottom: 1rem;
  }

  .section-intro {
    font-size: 1rem; line-height: 1.7; color: var(--gray);
    max-width: 560px; margin-bottom: 3.5rem;
  }

  /* ── HERO ── */
  #hero {
    min-height: 100vh;
    display: flex; align-items: center;
    padding-top: 8rem;
    overflow: hidden;
    position: relative;
  }

  .hero-bg {
    position: absolute; inset: 0; pointer-events: none;
    background:
      radial-gradient(ellipse 60% 50% at 70% 50%, rgba(124,58,237,0.18) 0%, transparent 70%),
      radial-gradient(ellipse 30% 30% at 20% 80%, rgba(124,58,237,0.08) 0%, transparent 60%);
  }

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

  .hero-eyebrow {
    font-family: var(--mono);
    font-size: .78rem; letter-spacing: .15em; text-transform: uppercase;
    color: var(--violet-glow); margin-bottom: 1.4rem;
    display: flex; align-items: center; gap: .6rem;
  }
  .hero-eyebrow span {
    width: 8px; height: 8px; background: var(--violet-bright);
    border-radius: 50%; animation: pulse 2s ease-in-out infinite;
  }

  @keyframes pulse {
    0%,100% { opacity: 1; transform: scale(1); }
    50% { opacity: .4; transform: scale(.7); }
  }

  .hero h1 {
    font-family: var(--serif);
    font-size: clamp(2.6rem, 5.5vw, 4.2rem);
    font-weight: 400; line-height: 1.1;
    color: var(--white); margin-bottom: 1.6rem;
  }

  .hero h1 em {
    font-style: italic; color: var(--violet-glow);
  }

  .hero-sub {
    font-size: 1.05rem; line-height: 1.7; color: var(--light);
    max-width: 500px; margin-bottom: 2.5rem;
  }

  .hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

  .btn-primary {
    display: inline-flex; align-items: center; gap: .5rem;
    background: var(--violet);
    color: #fff; text-decoration: none;
    padding: .9rem 2rem;
    font-family: var(--sans); font-size: .9rem; font-weight: 700;
    letter-spacing: .03em;
    border-radius: 4px;
    transition: background .2s, transform .15s, box-shadow .2s;
    border: none; cursor: pointer;
  }
  .btn-primary:hover {
    background: var(--violet-bright);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(124,58,237,0.4);
  }

  .btn-ghost {
    display: inline-flex; align-items: center; gap: .5rem;
    background: transparent;
    color: var(--light); text-decoration: none;
    padding: .9rem 2rem;
    font-family: var(--sans); font-size: .9rem; font-weight: 600;
    letter-spacing: .03em;
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: border-color .2s, color .2s, transform .15s;
    cursor: pointer;
  }
  .btn-ghost:hover {
    border-color: var(--violet-dim);
    color: var(--white);
    transform: translateY(-2px);
  }

  .hero-visual {
    position: relative; display: flex; justify-content: center; align-items: center;
  }

  .hero-terminal {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 100%; max-width: 480px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0,0,0,.6), 0 0 0 1px rgba(124,58,237,0.1);
  }

  .terminal-bar {
    background: var(--dark);
    border-bottom: 1px solid var(--border);
    padding: .7rem 1rem;
    display: flex; align-items: center; gap: .5rem;
  }
  .terminal-bar span {
    width: 10px; height: 10px; border-radius: 50%;
  }
  .terminal-bar span:nth-child(1) { background: #ff5f57; }
  .terminal-bar span:nth-child(2) { background: #febc2e; }
  .terminal-bar span:nth-child(3) { background: #28c840; }
  .terminal-bar-title {
    font-family: var(--mono);
    font-size: .7rem; color: var(--gray);
    margin-left: auto;
    letter-spacing: .05em;
  }

  .terminal-body {
    padding: 1.4rem 1.4rem 1.8rem;
    font-family: var(--mono);
    font-size: .78rem; line-height: 1.8;
  }

  .t-prompt { color: var(--violet-glow); }
  .t-cmd { color: var(--white); }
  .t-ok { color: #28c840; }
  .t-warn { color: #febc2e; }
  .t-info { color: var(--gray); }
  .t-val { color: #60d9fa; }

  .cursor {
    display: inline-block; width: 8px; height: 14px;
    background: var(--violet-bright);
    animation: blink .9s step-end infinite;
    vertical-align: middle;
  }
  @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

  .hero-badges {
    display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap;
  }
  .badge {
    font-family: var(--mono);
    font-size: .7rem; letter-spacing: .08em;
    color: var(--gray);
    border: 1px solid var(--border);
    padding: .35rem .75rem;
    border-radius: 100px;
    display: flex; align-items: center; gap: .4rem;
  }
  .badge-dot { width: 6px; height: 6px; background: #28c840; border-radius: 50%; }

  /* ── PROBLEMA ── */
  #problema { background: var(--black); }

  .problem-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1.5px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-top: 3rem;
  }

  .problem-card {
    background: var(--card);
    padding: 2.5rem 2rem;
    transition: background .2s;
    position: relative;
    overflow: hidden;
  }
  .problem-card:hover { background: #1a1a2a; }

  .problem-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--violet), transparent);
    opacity: 0; transition: opacity .3s;
  }
  .problem-card:hover::before { opacity: 1; }

  .problem-num {
    font-family: var(--mono);
    font-size: 2.5rem; font-weight: 500;
    color: rgba(124,58,237,0.2);
    line-height: 1; margin-bottom: 1.5rem;
  }

  .problem-icon {
    width: 42px; height: 42px;
    background: rgba(124,58,237,0.12);
    border: 1px solid rgba(124,58,237,0.25);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
  }

  .problem-card h3 {
    font-family: var(--sans); font-size: 1rem; font-weight: 700;
    color: var(--white); margin-bottom: .6rem; line-height: 1.3;
  }

  .problem-card p {
    font-size: .9rem; line-height: 1.65; color: var(--gray);
  }

  .solution-strip {
    background: rgba(124,58,237,0.08);
    border: 1px solid rgba(124,58,237,0.2);
    border-radius: 8px;
    padding: 2rem 2.5rem;
    margin-top: 1.5rem;
    display: flex; align-items: center; gap: 2rem;
    flex-wrap: wrap;
  }

  .solution-strip p {
    font-size: 1rem; line-height: 1.6; color: var(--light); flex: 1; min-width: 240px;
  }
  .solution-strip p strong { color: var(--violet-glow); }

  /* ── SERVICIOS ── */
  #servicios { background: var(--dark); }

  .services-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }

  .service-card {
    background: var(--card);
    padding: 2.5rem;
    transition: background .25s;
    position: relative;
  }
  .service-card:hover { background: #1a1a2a; }

  .service-card.featured {
    background: rgba(59,31,110,0.3);
  }
  .service-card.featured::after {
    content: 'RECOMENDADO';
    position: absolute; top: 1.2rem; right: 1.2rem;
    font-family: var(--mono); font-size: .62rem; font-weight: 500;
    letter-spacing: .12em;
    background: var(--violet);
    color: #fff;
    padding: .25rem .7rem;
    border-radius: 100px;
  }

  .service-tag {
    font-family: var(--mono); font-size: .68rem;
    letter-spacing: .1em; text-transform: uppercase;
    color: var(--violet-glow);
    margin-bottom: .8rem;
  }

  .service-card h3 {
    font-family: var(--serif); font-size: 1.5rem; font-weight: 400;
    color: var(--white); margin-bottom: .5rem;
  }

  .service-desc {
    font-size: .88rem; line-height: 1.65; color: var(--gray);
    margin-bottom: .8rem;
  }

  .service-ideal {
    font-size: .82rem; line-height: 1.5;
    color: var(--violet-glow);
    background: rgba(124,58,237,0.08);
    border-left: 2px solid var(--violet);
    padding: .5rem .8rem;
    border-radius: 0 4px 4px 0;
    margin-bottom: 1.2rem;
  }

  .service-features {
    list-style: none;
    display: flex; flex-direction: column; gap: .5rem;
    margin-bottom: 1.8rem;
  }
  .service-features li {
    font-size: .84rem; color: var(--light);
    display: flex; align-items: flex-start; gap: .6rem;
    line-height: 1.4;
  }
  .service-features li::before {
    content: '→'; color: var(--violet-glow); flex-shrink: 0; margin-top: .05em;
  }

  /* Tiers */
  .tiers {
    display: flex; flex-direction: column; gap: .8rem;
    margin-bottom: 1.5rem;
  }
  .tier {
    background: rgba(10,10,15,0.5);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.2rem;
    transition: border-color .2s;
  }
  .tier:hover { border-color: rgba(124,58,237,0.4); }
  .tier-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: .4rem;
  }
  .tier-name {
    font-family: var(--mono); font-size: .75rem;
    letter-spacing: .08em; text-transform: uppercase; color: var(--white); font-weight: 500;
  }
  .tier-desc { font-size: .8rem; color: var(--gray); line-height: 1.5; }

  /* ── CASOS REALES ── */
  #casos { background: var(--black); }

  .casos-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
  }

  .caso-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    transition: border-color .2s, background .2s;
    position: relative;
    overflow: hidden;
  }
  .caso-card:hover {
    border-color: rgba(124,58,237,0.3);
    background: #1a1a2a;
  }

  .caso-icon {
    font-size: 1.5rem; margin-bottom: .8rem;
  }

  .caso-tag {
    font-family: var(--mono); font-size: .68rem;
    letter-spacing: .1em; text-transform: uppercase;
    color: var(--violet-glow); margin-bottom: .6rem;
  }

  .caso-card h3 {
    font-family: var(--sans); font-size: 1rem; font-weight: 700;
    color: var(--white); margin-bottom: .8rem; line-height: 1.3;
  }

  .caso-card p {
    font-size: .87rem; line-height: 1.7; color: var(--gray);
    margin-bottom: 1rem;
  }

  .caso-result {
    font-family: var(--mono); font-size: .78rem;
    color: #28c840;
    background: rgba(40,200,64,0.08);
    border: 1px solid rgba(40,200,64,0.2);
    border-radius: 4px;
    padding: .5rem .8rem;
  }
  .caso-result span {
    font-weight: 600;
  }

  /* ── QUIZ ── */
  #quiz { background: var(--dark); }

  .quiz-wrap {
    max-width: 720px; margin: 3rem auto 0;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
  }

  .quiz-header {
    background: rgba(59,31,110,0.25);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    display: flex; align-items: center; gap: 1rem;
  }
  .quiz-header h3 {
    font-family: var(--sans); font-size: 1rem; font-weight: 700; color: var(--white);
  }
  .quiz-header p {
    font-size: .82rem; color: var(--gray);
  }
  .quiz-icon {
    width: 44px; height: 44px; flex-shrink: 0;
    background: var(--violet);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
  }

  .quiz-body { padding: 2rem; }

  .quiz-step { display: none; }
  .quiz-step.active { display: block; }

  .quiz-progress {
    display: flex; gap: .4rem; margin-bottom: 2rem;
  }
  .quiz-progress span {
    flex: 1; height: 3px; background: var(--border); border-radius: 2px;
    transition: background .4s;
  }
  .quiz-progress span.done { background: var(--violet); }

  .quiz-q {
    font-family: var(--serif); font-size: 1.3rem; font-weight: 400;
    color: var(--white); margin-bottom: 1.5rem; line-height: 1.3;
  }

  .quiz-options {
    display: flex; flex-direction: column; gap: .7rem;
  }
  .quiz-opt {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.2rem;
    cursor: pointer;
    display: flex; align-items: center; gap: 1rem;
    font-size: .9rem; color: var(--light);
    transition: border-color .2s, background .2s, color .2s;
    font-family: var(--sans);
  }
  .quiz-opt:hover {
    border-color: var(--violet-dim);
    background: rgba(59,31,110,0.15);
    color: var(--white);
  }
  .quiz-opt.selected {
    border-color: var(--violet);
    background: rgba(124,58,237,0.12);
    color: var(--white);
  }
  .quiz-opt-dot {
    width: 18px; height: 18px; flex-shrink: 0;
    border: 2px solid var(--border); border-radius: 50%;
    transition: border-color .2s, background .2s;
  }
  .quiz-opt.selected .quiz-opt-dot {
    border-color: var(--violet);
    background: var(--violet);
  }

  .quiz-actions {
    margin-top: 1.5rem; display: flex; justify-content: flex-end;
  }

  .quiz-result { display: none; }
  .quiz-result.active { display: block; }

  .result-box {
    background: rgba(59,31,110,0.2);
    border: 1px solid rgba(124,58,237,0.35);
    border-radius: 8px;
    padding: 2rem;
  }
  .result-label {
    font-family: var(--mono); font-size: .7rem;
    letter-spacing: .12em; text-transform: uppercase;
    color: var(--violet-glow); margin-bottom: .8rem;
  }
  .result-title {
    font-family: var(--serif); font-size: 1.8rem;
    color: var(--white); margin-bottom: .6rem;
  }
  .result-desc {
    font-size: .9rem; line-height: 1.65; color: var(--light); margin-bottom: 1.5rem;
  }
  .quiz-restart {
    background: none; border: none; color: var(--gray);
    font-family: var(--mono); font-size: .75rem;
    cursor: pointer; text-decoration: underline;
    margin-top: .5rem; display: block;
    letter-spacing: .05em;
  }
  .quiz-restart:hover { color: var(--light); }

  /* ── POR QUÉ ADMAPA ── */
  #por-que { background: var(--dark); }

  .diff-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-top: 3rem;
  }

  .diff-card {
    background: var(--card);
    padding: 2.5rem 2rem;
    transition: background .2s;
    display: flex; gap: 1.2rem;
  }
  .diff-card:hover { background: #1a1a2a; }

  .diff-num {
    font-family: var(--mono);
    font-size: 2.2rem; font-weight: 500;
    color: rgba(124,58,237,0.25);
    line-height: 1; flex-shrink: 0; width: 2.5rem;
  }

  .diff-content h3 {
    font-size: 1rem; font-weight: 700; color: var(--white);
    margin-bottom: .5rem; line-height: 1.3;
  }
  .diff-content p {
    font-size: .88rem; line-height: 1.65; color: var(--gray);
  }
  .diff-content p strong { color: var(--light); }

  /* ── QUIÉNES SOMOS ── */
  #quienes { background: var(--black); }

  .quienes-grid {
    display: grid; grid-template-columns: 1.4fr 1fr;
    gap: 4rem; align-items: start;
    margin-top: 3rem;
  }

  .quienes-text p {
    font-size: .95rem; line-height: 1.75; color: var(--gray);
    margin-bottom: 1.2rem;
  }

  .quienes-list {
    list-style: none;
    display: flex; flex-direction: column; gap: .6rem;
    margin: 1.2rem 0 1.5rem;
  }
  .quienes-list li {
    font-size: .88rem; color: var(--light);
    display: flex; align-items: flex-start; gap: .7rem;
    line-height: 1.5;
  }
  .quienes-list li::before {
    content: '→'; color: var(--violet-glow); flex-shrink: 0; margin-top: .1em;
  }

  .quienes-stats {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }

  .stat-card {
    background: var(--card);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: background .2s;
  }
  .stat-card:hover { background: #1a1a2a; }

  .stat-num {
    font-family: var(--mono); font-size: 2rem; font-weight: 500;
    color: var(--violet-glow); line-height: 1; margin-bottom: .5rem;
  }

  .stat-label {
    font-size: .78rem; color: var(--gray); line-height: 1.4;
  }

  /* ── CONTACTO ── */
  #contacto { background: var(--dark); }

  .contact-grid {
    display: grid; grid-template-columns: 1fr 1.6fr;
    gap: 4rem; align-items: start;
    margin-top: 3rem;
  }

  .contact-info h3 {
    font-family: var(--serif); font-size: 1.4rem; font-weight: 400;
    color: var(--white); margin-bottom: 1rem;
  }

  .contact-info p {
    font-size: .9rem; line-height: 1.7; color: var(--gray);
    margin-bottom: 2rem;
  }

  .contact-links {
    display: flex; flex-direction: column; gap: .8rem;
  }
  .contact-link {
    display: flex; align-items: center; gap: .8rem;
    font-size: .88rem; color: var(--light);
    text-decoration: none;
    transition: color .2s;
    font-family: var(--mono);
  }
  .contact-link:hover { color: var(--violet-glow); }
  .contact-link-icon {
    width: 36px; height: 36px;
    background: rgba(124,58,237,0.1);
    border: 1px solid rgba(124,58,237,0.2);
    border-radius: 6px;
    display: flex; align-items: center; justify-content: center;
    font-size: .9rem; flex-shrink: 0;
    transition: background .2s;
  }
  .contact-link:hover .contact-link-icon {
    background: rgba(124,58,237,0.2);
  }

  /* FORM */
  .contact-form {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2.5rem;
  }

  .form-row {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .form-group { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1rem; }

  .form-group label {
    font-family: var(--mono); font-size: .72rem;
    letter-spacing: .08em; text-transform: uppercase;
    color: var(--gray);
  }

  .form-group input,
  .form-group textarea {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: .8rem 1rem;
    font-family: var(--sans); font-size: .9rem;
    color: var(--white);
    outline: none;
    transition: border-color .2s;
    width: 100%;
  }
  .form-group input:focus,
  .form-group textarea:focus {
    border-color: var(--violet);
  }
  .form-group textarea { resize: vertical; min-height: 110px; }
  .form-group input::placeholder,
  .form-group textarea::placeholder { color: #40405a; }

  .form-submit { width: 100%; margin-top: .5rem; }

  .form-status {
    font-family: var(--mono); font-size: .8rem;
    margin-top: 1rem; text-align: center;
    display: none;
  }
  .form-status.success { color: #28c840; display: block; }
  .form-status.error { color: #ff5f57; display: block; }

  /* ── FOOTER ── */
  footer {
    background: var(--black);
    border-top: 1px solid var(--border);
    padding: 2rem 5%;
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 1rem;
  }

  footer p {
    font-family: var(--mono); font-size: .72rem;
    color: var(--gray); letter-spacing: .04em;
  }
  footer a { color: var(--gray); text-decoration: none; }
  footer a:hover { color: var(--violet-glow); }

  /* ── SCROLL ANIMATIONS ── */
  .reveal {
    opacity: 0; transform: translateY(28px);
    transition: opacity .65s ease, transform .65s ease;
  }
  .reveal.visible {
    opacity: 1; transform: translateY(0);
  }
  .reveal-delay-1 { transition-delay: .1s; }
  .reveal-delay-2 { transition-delay: .2s; }
  .reveal-delay-3 { transition-delay: .3s; }
  .reveal-delay-4 { transition-delay: .4s; }

  /* ── RESPONSIVE ── */
  @media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
    .hero-visual { display: none; }
    .services-grid { grid-template-columns: 1fr; }
    .problem-grid { grid-template-columns: 1fr; }
    .diff-grid { grid-template-columns: 1fr; }
    .casos-grid { grid-template-columns: 1fr; }
    .quienes-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .form-row { grid-template-columns: 1fr; }
    .nav-links {
      display: none;
      flex-direction: column;
      position: fixed;
      inset: 0;
      top: 62px;
      background: rgba(10,10,15,0.98);
      backdrop-filter: blur(16px);
      padding: 2rem;
      gap: 1.5rem;
      z-index: 99;
      border-top: 1px solid var(--border);
    }
    .nav-links.open { display: flex; }
    .nav-links a { font-size: 1rem; }
    .hamburger { display: flex; }
  }