/* Mobile-first dark theme - lightweight, optimized */
:root{
  --bg:#0b0f14;
  --surface:#0f1720;
  --muted:#9aa6b2;
  --accent-1:#00d4ff; /* cyan */
  --accent-2:#7c5cff; /* violet */
  --card:#0f1724;
  --glass: rgba(255,255,255,0.03);
  --max-width:1100px;
  --radius:12px;
}
*{box-sizing:border-box}
html{min-height:100%;background-color:#071019}
body{min-height:100vh;min-height:100dvh;width:100%;background-color:#071019}
html{scroll-behavior:smooth;scroll-padding:16px 0 120px}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background-image:linear-gradient(180deg,var(--bg),#071019);
  background-repeat:no-repeat;
  color:#e6eef6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.4;
  min-width:320px;
}
img,svg{max-width:100%;display:block}
a{color:inherit}
.container{max-width:var(--max-width);margin:0 auto;padding:20px}
.header{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.header.container{padding:14px clamp(16px,3vw,32px)}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.logo{width:44px;height:44px;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;color:#02111a;flex-shrink:0}
.nav{display:flex;gap:14px;align-items:center;justify-content:flex-end}
.nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:14px}
.cta-header{background:linear-gradient(90deg,var(--accent-1),var(--accent-2));padding:10px 14px;border-radius:10px;color:#02111a;font-weight:700;font-size:14px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}
/* HERO */
.hero{padding:14px 0 6px}
.h-strap{font-size:18px;color:var(--accent-1);font-weight:700;margin-bottom:6px}
.senior-badge{display:inline-flex;align-items:center;align-self:flex-start;min-height:28px;margin-bottom:8px;padding:5px 10px;border:1px solid rgba(255,190,72,0.55);border-radius:999px;background:linear-gradient(100deg,rgba(255,170,55,0.2),rgba(255,89,107,0.16));color:#ffd166;font-size:12px;font-weight:800;letter-spacing:0.02em;text-decoration:none;box-shadow:0 0 18px rgba(255,170,55,0.14);transition:transform 180ms ease,border-color 180ms ease}
.senior-badge:hover,.senior-badge:focus-visible{transform:translateY(-1px);border-color:#ffd166}
.senior-badge:focus-visible{outline:2px solid #ffd166;outline-offset:2px}
.h1{font-size:clamp(2rem, 7vw, 3.2rem);line-height:1.05;margin:6px 0 8px;font-weight:800;letter-spacing:-0.04em}
.hero-intro{display:grid;gap:12px;align-items:start}
.hero-heading{min-width:0}
.hero-heading .h1{min-width:0}
.hero-video-column{display:flex;flex-direction:column}
.hero-video{width:100%;aspect-ratio:16/9;overflow:hidden;border-radius:12px;background:#000;box-shadow:0 6px 30px rgba(2,6,23,0.6)}
.hero-video iframe{width:100%;height:100%;border:0}
.h-sub{color:var(--muted);margin-bottom:14px;font-size:1rem}
.hero-row{display:flex;gap:12px;align-items:center;flex-direction:column-reverse}
.hero-left{flex:1;width:100%}
.hero-ctas{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 14px;border-radius:10px;border:0;cursor:pointer;text-decoration:none;font-weight:700;line-height:1.1}
.btn-primary{background:linear-gradient(90deg,var(--accent-1),var(--accent-2));color:#02111a;font-weight:800}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--accent-1)}
.micro{font-size:12px;color:var(--muted);margin-top:8px}
.social-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.social-link{display:inline-flex;align-items:center;gap:7px;min-height:40px;padding:8px 11px;border:1px solid rgba(255,255,255,0.08);border-radius:10px;background:var(--glass);color:var(--muted);font-size:13px;font-weight:700;text-decoration:none;transition:color 180ms ease,border-color 180ms ease,background 180ms ease}
.social-link svg{width:17px;height:17px;fill:currentColor}
.social-link:hover,.social-link:focus-visible{color:var(--accent-1);border-color:var(--accent-1);background:rgba(0,212,255,0.08)}
.social-link:focus-visible{outline:2px solid var(--accent-1);outline-offset:2px}
.code-mock .social-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin-top:auto;padding-top:10px}
.social-heading{flex-basis:100%;color:#fff;font-family:Inter,system-ui,sans-serif;font-size:12px;font-weight:800;letter-spacing:.03em}
.code-mock .social-heading{grid-column:1/-1}
.code-mock .social-link{min-width:0;min-height:40px;gap:5px;padding:5px 7px;border-color:rgba(159,232,255,.35);background:rgba(0,0,0,.32);color:#fff;font-size:10px;white-space:nowrap}
.code-mock .social-link svg{width:14px;height:14px}
.code-mock .social-link:hover,.code-mock .social-link:focus-visible{color:#fff;border-color:#00d4ff;background:rgba(0,212,255,.24)}
/* hero visual */
.visual{width:min(100%, 320px);height:190px;border-radius:12px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));display:flex;align-items:center;justify-content:center;box-shadow:0 6px 30px rgba(2,6,23,0.6);margin:0 auto}
.code-mock{width:88%;height:82%;display:flex;flex-direction:column;background:linear-gradient(180deg,#071a24,#05202a);border-radius:8px;padding:clamp(8px,2vw,10px);color:#9fe8ff;font-family:'JetBrains Mono', monospace;font-size:clamp(10px,1.4vw,12px);overflow:hidden}
.line{height:8px;border-radius:4px;margin:6px 0;background:linear-gradient(90deg,#0bf,#37f)}
/* trust bar */
.trust-section{margin:14px 0}
.trust-heading{display:flex;align-items:center;justify-content:flex-start;gap:10px;margin-bottom:8px}
.trust-heading .section-eyebrow{margin:0}
.stack-link{display:inline-flex;align-items:center;gap:7px;min-height:36px;padding:7px 11px;border:1px solid rgba(0,212,255,.35);border-radius:999px;background:linear-gradient(100deg,rgba(0,212,255,.13),rgba(124,92,255,.13));color:#9fe8ff;font-size:11px;font-weight:800;letter-spacing:.04em;text-decoration:none;transition:background 180ms ease,border-color 180ms ease,transform 180ms ease}
.stack-link:hover,.stack-link:focus-visible{transform:translateY(-1px);border-color:var(--accent-1);background:linear-gradient(100deg,rgba(0,212,255,.24),rgba(124,92,255,.2))}
.stack-link:focus-visible{outline:2px solid var(--accent-1);outline-offset:2px}
.trust{display:flex;gap:8px;flex-wrap:wrap;margin:0}
.tag{background:var(--glass);padding:8px 10px;border-radius:999px;color:var(--muted);font-weight:700;font-size:13px}
/* Cards grid */
.grid{display:grid;gap:12px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:14px;border-radius:12px}
.card .level{font-size:12px;color:var(--muted);font-weight:700}
.card h3{margin:8px 0 6px}
.bullets{margin:8px 0;color:var(--muted)}
.badge{display:inline-block;padding:6px 8px;border-radius:8px;background:rgba(255,255,255,0.03);font-weight:700;color:var(--accent-1);font-size:12px}
.course-image{width:100%;height:auto;aspect-ratio:3/2;border-radius:8px;display:block;object-fit:contain}
.technology-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:8px}
.technology-card{display:flex;min-width:0;min-height:104px;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:14px 8px;border:1px solid rgba(255,255,255,.07);border-radius:14px;background:linear-gradient(145deg,rgba(255,255,255,.04),rgba(255,255,255,.012));color:#e6eef6;font-size:.9rem;font-weight:700;text-align:center;transition:transform 180ms ease,border-color 180ms ease,background 180ms ease}
.technology-card:hover{transform:translateY(-3px);border-color:rgba(0,212,255,.38);background:linear-gradient(145deg,rgba(0,212,255,.08),rgba(124,92,255,.04))}
.technology-logo{display:flex;align-items:center;justify-content:center;height:38px;font-size:2.4rem;line-height:1}
.scrum-logo{width:38px;color:#00d4ff}
/* Challenge and preparation sections */
.challenge-section,.benefits-section{margin-top:30px}
.section-heading{max-width:720px;margin-bottom:16px}
.section-eyebrow{display:inline-block;margin-bottom:7px;color:var(--accent-1);font-size:11px;font-weight:800;letter-spacing:.14em}
.section-heading h2{margin:0;font-size:clamp(1.45rem,3vw,2.1rem);line-height:1.15;letter-spacing:-.025em}
.section-heading p{margin:8px 0 0;color:var(--muted);font-size:.96rem}
.challenge-grid,.journey-grid{display:grid;grid-template-columns:1fr;gap:12px}
.challenge-card,.journey-card{position:relative;min-width:0;padding:18px;border:1px solid rgba(255,255,255,.07);border-radius:14px;background:linear-gradient(145deg,rgba(255,255,255,.045),rgba(255,255,255,.015));}
.challenge-card{display:grid;grid-template-columns:42px 1fr;column-gap:12px;align-items:center}
.feature-icon{width:42px;height:42px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(0,212,255,.2);border-radius:12px;background:rgba(0,212,255,.08);color:var(--accent-1)}
.feature-icon svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.challenge-card .feature-icon{grid-row:span 2}
.challenge-card h3,.journey-card h3{margin:0;font-size:1rem;line-height:1.25}
.challenge-card p,.journey-card p{margin:5px 0 0;color:var(--muted);font-size:.9rem;line-height:1.5}
.benefits-section{padding:22px;border:1px solid rgba(124,92,255,.16);border-radius:18px;background:radial-gradient(ellipse at top right,rgba(124,92,255,.09),transparent 45%),linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.01))}
.journey-card{padding:18px 16px;background:rgba(9,15,24,.72)}
.journey-number{display:inline-flex;align-items:center;justify-content:center;position:absolute;top:14px;right:14px;width:30px;height:30px;border-radius:50%;background:rgba(124,92,255,.14);color:#b6a6ff;font-size:11px;font-weight:800}
.journey-card .feature-icon{margin-bottom:13px}
.benefits-cta{margin-top:16px}
.course-picker{width:min(92vw,560px);max-height:calc(100vh - 24px);max-height:calc(100dvh - env(safe-area-inset-top) - env(safe-area-inset-bottom) - 24px);overflow-y:auto;overscroll-behavior:contain;padding:0;border:1px solid rgba(0,212,255,.25);border-radius:18px;background:#0f1720;color:#e6eef6;box-shadow:0 24px 80px rgba(0,0,0,.55)}
.course-picker::backdrop{background:rgba(3,8,14,.78);backdrop-filter:blur(5px)}
.course-picker-content{position:relative;padding:28px}
.course-picker-close{position:absolute;top:12px;right:14px;width:38px;height:38px;border:1px solid rgba(255,255,255,.1);border-radius:10px;background:var(--glass);color:var(--muted);font-size:25px;line-height:1;cursor:pointer}
.course-picker h2{margin:0;font-size:clamp(1.4rem,4vw,1.9rem)}
.course-picker-content>p{margin:8px 0 18px;color:var(--muted)}
.course-picker-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.course-picker-option{display:flex;min-height:140px;flex-direction:column;align-items:flex-start;justify-content:center;gap:7px;padding:18px;border:1px solid rgba(0,212,255,.25);border-radius:14px;background:linear-gradient(145deg,rgba(0,212,255,.1),rgba(124,92,255,.08));color:#e6eef6;text-align:left;cursor:pointer;transition:transform 180ms ease,border-color 180ms ease}
.course-picker-option:hover,.course-picker-option:focus-visible{transform:translateY(-2px);border-color:var(--accent-1)}
.course-picker-option:focus-visible{outline:2px solid var(--accent-1);outline-offset:3px}
.course-picker-option-senior{border-color:rgba(255,190,72,.32);background:linear-gradient(145deg,rgba(255,170,55,.13),rgba(255,89,107,.08))}
.course-picker-option-senior:hover,.course-picker-option-senior:focus-visible{border-color:#ffd166}
.course-picker-level{color:var(--accent-1);font-size:10px;font-weight:800;letter-spacing:.09em}
.course-picker-option-senior .course-picker-level{color:#ffd166}
.course-picker-option strong{font-size:1.15rem}
.course-picker-option>span:last-child{color:var(--muted);font-size:.88rem}
.recommendation-cta{margin-top:4px}
/* comparison */
.table{width:100%;max-width:100%;overflow-x:auto;overscroll-behavior-x:contain;background:transparent;border-radius:10px;padding:10px}
.table table{width:100%;border-collapse:collapse;min-width:420px}
.table th, .table td{padding:10px;border-bottom:1px solid rgba(255,255,255,0.03);text-align:left;vertical-align:top}
/* quiz */
.quiz{background:var(--glass);padding:12px;border-radius:12px}
.radio{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:10px;border:1px solid transparent;min-height:44px}
.radio input{flex:0 0 auto;transform:scale(1.1)}
/* author */
.author{display:grid;grid-template-columns:1fr;gap:22px;align-items:center}
.author-profile{display:flex;gap:12px;align-items:center;min-width:0}
.avatar{width:72px;height:72px;border-radius:14px;object-fit:cover;object-position:center 30%;flex-shrink:0}
.author-label{margin-bottom:4px;color:var(--accent-1);font-size:10px;font-weight:800;letter-spacing:.14em}
.company-logos{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;align-items:center}
.company-logo{display:flex;min-width:0;min-height:68px;align-items:center;justify-content:center;position:relative;padding:10px;border:1px solid rgba(255,255,255,.07);border-radius:12px;background:rgba(255,255,255,.025)}
.company-logo svg{width:100%;max-width:130px;height:auto}
.company-logo text{font-family:Arial,sans-serif;font-size:29px;font-weight:800;letter-spacing:-1px}
.company-logo-bcp text{fill:#0072bc}
.company-logo-bbva text{fill:#1464a5;letter-spacing:1px}
.company-logo-claro text{fill:#da291c;font-size:30px}
.company-logo-claro>span{position:absolute;right:7px;bottom:4px;color:#9aa6b2;font-size:8px;font-weight:800;letter-spacing:.1em}
/* faq */
.faq-section{margin-top:34px}
.faq-section .section-heading{margin-bottom:18px}
.accordion{display:grid;gap:10px;max-width:900px;margin:0 auto}
.accordion details{overflow:hidden;border:1px solid rgba(255,255,255,.08);border-radius:14px;background:linear-gradient(145deg,rgba(255,255,255,.035),rgba(255,255,255,.012));transition:border-color 180ms ease,background 180ms ease}
.accordion details:hover{border-color:rgba(0,212,255,.28)}
.accordion details[open]{border-color:rgba(0,212,255,.38);background:linear-gradient(145deg,rgba(0,212,255,.055),rgba(255,255,255,.015))}
.accordion summary{cursor:pointer;padding:17px 18px;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:700;line-height:1.4}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::marker{content:""}
.accordion summary>span:first-child{min-width:0}
.faq-toggle{position:relative;display:grid;width:28px;height:28px;flex:0 0 28px;place-items:center;border:1px solid rgba(0,212,255,.28);border-radius:50%;background:rgba(0,212,255,.08);color:var(--accent-1)}
.faq-toggle::before,.faq-toggle::after{content:"";position:absolute;width:11px;height:2px;border-radius:2px;background:currentColor;transition:transform 180ms ease}
.faq-toggle::after{transform:rotate(90deg)}
.accordion details[open] .faq-toggle::after{transform:rotate(0)}
.faq-answer{padding:0 58px 18px 18px;color:var(--muted);line-height:1.65}
.faq-answer p{margin:0}
.faq-contact{display:flex;max-width:900px;align-items:center;justify-content:space-between;gap:14px;margin:16px auto 0;padding:16px 18px;border:1px solid rgba(124,92,255,.2);border-radius:14px;background:rgba(124,92,255,.055);color:#e6eef6;font-size:.92rem}
.faq-contact .btn{flex-shrink:0}
/* sticky mobile CTA */
.sticky-cta{position:fixed;left:max(12px,env(safe-area-inset-left));right:max(12px,env(safe-area-inset-right));bottom:max(12px,env(safe-area-inset-bottom));background:linear-gradient(90deg,var(--accent-1),var(--accent-2));padding:12px;border-radius:14px;display:flex;justify-content:center;align-items:center;z-index:40;box-shadow:0 10px 30px rgba(2,6,23,0.6)}
/* whatsapp floating */
.whatsapp{position:fixed;right:max(12px,env(safe-area-inset-right));bottom:calc(max(84px,env(safe-area-inset-bottom)) + 8px);background:linear-gradient(135deg,#25D366,#128C7E);width:56px;height:56px;border-radius:999px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 24px rgba(2,6,23,0.6);z-index:50;border:0}
.whatsapp small{display:none}
/* footer */
.footer{padding:20px 0;color:var(--muted);font-size:13px}

@media (max-width: 539px){
  .container{padding:16px}
  .header.container{padding-block:10px}
  .nav{gap:8px}
  .nav a:not(.cta-header){display:none}
  .cta-header{padding:8px 10px;font-size:12px}
  .hero{padding-top:6px}
  .h-strap{font-size:16px}
  .trust-heading{align-items:center;flex-direction:row;gap:8px;flex-wrap:wrap}
  .stack-link{min-height:40px}
  .hero-intro{grid-template-columns:minmax(0,1fr)}
  .hero-ctas{flex-direction:column}
  .btn{width:100%;justify-content:center}
  .visual{height:auto;min-height:170px;padding:10px}
  .code-mock{width:100%;height:auto;min-height:150px;overflow:visible}
  .code-mock>div:first-child{overflow-wrap:anywhere;line-height:1.45}
  .code-mock .social-links{margin-top:10px}
  .course-image{height:auto}
  .challenge-section,.benefits-section{margin-top:24px}
  .challenge-card{padding:15px}
  .benefits-section{padding:17px;border-radius:14px}
  .journey-grid{gap:10px}
  .journey-card{padding:16px}
  .course-picker-content{padding:24px 18px}
  .course-picker-options{grid-template-columns:1fr}
  .course-picker-option{min-height:112px}
  .faq-section{margin-top:26px}
  .accordion{gap:8px}
  .accordion summary{padding:15px 14px;font-size:.94rem}
  .faq-answer{padding:0 48px 15px 14px;font-size:.9rem}
  .faq-contact{align-items:stretch;flex-direction:column;padding:15px}
  .whatsapp{right:14px;bottom:76px;width:54px;height:54px}
  .sticky-cta{left:max(10px,env(safe-area-inset-left));right:max(10px,env(safe-area-inset-right));bottom:max(10px,env(safe-area-inset-bottom))}
  .whatsapp{right:max(14px,env(safe-area-inset-right));bottom:calc(max(76px,env(safe-area-inset-bottom)) + 8px)}
  .table{padding:8px 4px}
}

@media (min-width: 540px) and (max-width: 767px){
  .header.container{padding-block:12px}
  .nav a:not(.cta-header){display:none}
  .hero-row{flex-direction:column-reverse}
  .btn{min-width:180px}
  .author-profile{align-items:flex-start}
  .challenge-grid,.journey-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .technology-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (min-width: 768px){
  .container{padding:24px 24px 28px}
  .h-strap{font-size:22px}
  .hero-intro{grid-template-columns:minmax(0,1.2fr) minmax(280px,0.8fr);gap:20px}
  .hero-row{flex-direction:row;align-items:center}
  .hero-left{width:auto}
  .visual{width:320px;height:200px;margin:0}
  .grid{grid-template-columns:repeat(2, minmax(0,1fr))}
  .challenge-grid,.journey-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .technology-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .author{grid-template-columns:minmax(0,1.5fr) minmax(280px,1fr);gap:24px}
}

@media (min-width: 900px){
  .h1{font-size:clamp(2.5rem, 3vw + 1rem, 4rem)}
  .h-sub{font-size:1.125rem}
}

@media (min-width: 1024px){
  .container{max-width:1200px;padding-left:32px;padding-right:32px}
  .nav{gap:22px}
  .nav a{font-size:15px}
  .grid{grid-template-columns:repeat(2, minmax(0,1fr))}
  .challenge-grid,.journey-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .technology-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
  .journey-grid{position:relative}
  .journey-card:not(:last-child)::after{content:"";position:absolute;z-index:1;top:38px;right:-13px;width:14px;border-top:1px solid rgba(124,92,255,.42)}
}

@media (min-width: 768px) and (max-width: 1100px){
  .hero-intro{grid-template-columns:minmax(0,1fr) minmax(250px,.82fr);gap:16px}
  .hero-heading .h1{font-size:clamp(2rem,4vw,3rem)}
  .visual{width:min(100%,300px)}
}

@media (min-width: 1280px){
  .container{max-width:1260px}
  .hero{padding-top:24px}
  .h1{font-size:4.2rem}
}

@media (min-width: 1440px){
  .container{max-width:1320px}
  .hero{padding-top:30px}
  .visual{width:420px;height:240px}
}

@media (min-width: 1800px){
  .container{max-width:1400px}
}

@media (max-width: 359px){
  .container{padding:12px}
  .brand{gap:8px}
  .logo{width:38px;height:38px}
  .hero-ctas{gap:8px}
  .code-mock{width:92%;padding:8px}
  .code-mock .social-links{gap:4px}
  .code-mock .social-link{padding:5px 6px}
  .technology-grid{gap:8px}
  .technology-card{min-height:92px;font-size:.82rem}
  .company-logos{gap:6px}
}

@media (max-height: 500px) and (orientation: landscape) and (max-width: 900px){
  .hero{padding-top:8px}
  .hero-intro{gap:10px}
  .hero-video-column{max-width:46vh}
  .hero-video{max-height:42vh}
  .sticky-cta{padding:8px}
  .sticky-cta .btn{min-height:40px;padding:9px 12px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}