/* ========================================
   TecnoCenter Academy v2 (cursos2)
   Estilo limpio, sin patrones repetidos
======================================== */

:root,
[data-theme="light"] {
    --bg-0: #f7f7f5;
    --bg-1: #ffffff;
    --bg-2: #eef1f5;
    --bg-nav: rgba(255,255,255,0.92);
    --bg-modal: #ffffff;
    --bg-overlay: rgba(9,12,22,0.6);
    --bg-input: #f3f4f6;

    --text-1: #0f172a;
    --text-2: #4b5563;
    --text-3: #9ca3af;
    --text-inv: #ffffff;

    --brd: #e2e8f0;
    --brd-light: #f1f5f9;

    --brand: #0ea5e9;
    --brand-hover: #0284c7;
    --brand-light: #e0f2fe;
    --brand-gradient: linear-gradient(135deg, #0ea5e9, #22c55e);

    --accent-2: #f97316;
    --accent-2-light: #fff4eb;

    --green: #22c55e;
    --red: #ef4444;

    --shadow-s: 0 1px 2px rgba(15,23,42,.06);
    --shadow-m: 0 6px 18px rgba(15,23,42,.12);
    --shadow-l: 0 16px 40px rgba(15,23,42,.15);

    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --r-xl: 22px;
    --r-full: 999px;
}

[data-theme="dark"] {
    --bg-0: #0b1220;
    --bg-1: #111827;
    --bg-2: #1f2937;
    --bg-nav: rgba(11,18,32,0.9);
    --bg-modal: #0f172a;
    --bg-overlay: rgba(0,0,0,0.75);
    --bg-input: #1f2937;

    --text-1: #e5e7eb;
    --text-2: #cbd5e1;
    --text-3: #94a3b8;
    --text-inv: #0b1220;

    --brd: #1f2937;
    --brd-light: #111827;

    --brand: #38bdf8;
    --brand-hover: #0ea5e9;
    --brand-light: rgba(14,165,233,0.15);
    --brand-gradient: linear-gradient(135deg, #22d3ee, #22c55e);

    --accent-2: #fb923c;
    --accent-2-light: rgba(251,146,60,0.15);

    --green: #34d399;
    --red: #f87171;

    --shadow-s: 0 1px 2px rgba(0,0,0,.2);
    --shadow-m: 0 8px 18px rgba(0,0,0,.25);
    --shadow-l: 0 18px 40px rgba(0,0,0,.35);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;background:var(--bg-0);color:var(--text-1);line-height:1.6;overflow-x:hidden;transition:background .3s,color .3s}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block;height:auto}
button{cursor:pointer;border:none;outline:none;background:none;font-family:inherit}
input,textarea,select{font-family:inherit;font-size:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* NAVBAR */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--bg-nav);backdrop-filter:blur(18px);border-bottom:1px solid var(--brd);transition:box-shadow .3s}
.navbar.scrolled{box-shadow:var(--shadow-m)}
.nav-container{max-width:1180px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:68px}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--text-1);letter-spacing:-.02em;font-size:1rem}
.logo-icon{width:34px;height:34px;border-radius:var(--r-md);background:var(--brand-gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{padding:8px 14px;border-radius:var(--r-full);color:var(--text-2);font-size:.9rem;font-weight:600;transition:all .2s}
.nav-link:hover{color:var(--brand);background:var(--brand-light)}
.nav-actions{display:flex;align-items:center;gap:8px}
.theme-toggle{width:40px;height:40px;border-radius:var(--r-full);display:flex;align-items:center;justify-content:center;background:var(--bg-2);font-size:1.05rem;transition:all .2s}
.theme-toggle:hover{background:var(--brand-light)}
[data-theme="light"] .theme-icon-dark,[data-theme="dark"] .theme-icon-light{display:none}
.cart-btn{padding:8px 14px;border-radius:var(--r-full);background:var(--bg-2);color:var(--text-1);display:flex;align-items:center;gap:6px;font-weight:700;transition:all .2s}
.cart-btn:hover{background:var(--brand-light);color:var(--brand)}
.cart-count{background:var(--brand);color:#fff;font-size:.7rem;font-weight:800;min-width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.nav-menu-btn{display:none;flex-direction:column;gap:4px;width:40px;height:40px;align-items:center;justify-content:center;border-radius:var(--r-sm)}
.nav-menu-btn span{width:22px;height:2px;background:var(--text-1);border-radius:2px;transition:all .3s}

/* HERO */
.hero{padding:130px 0 90px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-180px;right:-220px;width:640px;height:640px;background:var(--brand-gradient);border-radius:50%;opacity:.06;pointer-events:none}
.hero::after{content:"";position:absolute;bottom:-240px;left:-180px;width:500px;height:500px;background:var(--accent-2-light);border-radius:50%;opacity:.4;pointer-events:none}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero-content{max-width:560px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:var(--r-full);background:var(--accent-2-light);color:var(--accent-2);font-weight:700;font-size:.82rem;margin-bottom:18px;letter-spacing:.02em}
.hero-title{font-size:2.9rem;font-weight:900;line-height:1.08;letter-spacing:-.03em;margin-bottom:14px}
.hero-title .highlight{-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;background:var(--brand-gradient)}
.hero-desc{font-size:1.05rem;color:var(--text-2);line-height:1.7;margin-bottom:28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual .panel{background:var(--bg-1);border:1px solid var(--brd);border-radius:var(--r-xl);padding:18px;box-shadow:var(--shadow-l)}
.panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini-card{background:var(--bg-0);border:1px solid var(--brd);border-radius:var(--r-lg);overflow:hidden}
.mini-card img{width:100%;height:120px;object-fit:cover}
.mini-card .body{padding:10px}
.mini-card .cat{font-size:.72rem;font-weight:700;color:var(--brand)}
.mini-card .ttl{font-size:.9rem;font-weight:700;color:var(--text-1)}
.stat-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.stat-box{background:var(--bg-2);border-radius:var(--r-lg);padding:12px}
.stat-num{font-weight:900;font-size:1.1rem;color:var(--brand)}
.stat-lbl{color:var(--text-3);font-size:.78rem}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 20px;border-radius:var(--r-md);font-weight:700;font-size:.92rem;transition:all .2s;border:2px solid transparent}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 8px 24px rgba(14,165,233,.25)}
.btn-outline{border-color:var(--brd);color:var(--text-1);background:var(--bg-1)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:14px 26px}
.btn-block{width:100%}
.btn-outline-accent{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-outline-accent:hover{background:var(--brand-light)}

section{padding:80px 0}
.section-header{text-align:center;max-width:620px;margin:0 auto 48px}
.section-label{display:inline-block;font-size:.76rem;font-weight:800;color:var(--brand);letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}
.section-title{font-size:2rem;font-weight:900;letter-spacing:-.02em;margin-bottom:10px}
.section-desc{color:var(--text-2);font-size:.95rem}

/* CATEGORIES PILLS */
.categories{padding:0 0 20px}
.categories-scroll{display:flex;gap:10px;overflow-x:auto;padding:0 24px 10px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.categories-scroll::-webkit-scrollbar{display:none}
.category-card{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--r-full);background:var(--bg-1);border:1.5px solid var(--brd);color:var(--text-2);font-weight:700;font-size:.85rem;white-space:nowrap;transition:all .2s}
.category-card:hover{border-color:var(--brand);color:var(--brand)}
.category-card.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.category-card .cat-count{background:var(--bg-2);padding:2px 8px;border-radius:var(--r-full);font-size:.72rem;font-weight:800}
.category-card.active .cat-count{background:rgba(255,255,255,.25);color:#fff}

/* COURSES */
.courses{background:var(--bg-0)}
.courses-toolbar{display:flex;gap:12px;margin-bottom:26px;align-items:center}
.search-box{flex:1;position:relative}
.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-3);font-size:.95rem}
.search-input{width:100%;padding:12px 14px 12px 42px;border-radius:var(--r-md);border:1.5px solid var(--brd);background:var(--bg-1);color:var(--text-1);font-size:.9rem;transition:border-color .2s}
.search-input:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--brand-light)}
.sort-select{padding:12px 14px;border-radius:var(--r-md);border:1.5px solid var(--brd);background:var(--bg-1);color:var(--text-1);font-size:.85rem;cursor:pointer;min-width:160px}
.sort-select:focus{border-color:var(--brand);outline:none}
.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.courses-empty{text-align:center;padding:60px 20px;color:var(--text-3)}
.courses-empty .empty-icon{font-size:2.3rem;display:block;margin-bottom:10px}

/* COURSE CARD */
.course-card{background:var(--bg-1);border:1px solid var(--brd);border-radius:var(--r-lg);overflow:hidden;transition:transform .25s,box-shadow .25s}
.course-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-l)}
.course-thumb{position:relative;overflow:hidden;aspect-ratio:16/10}
.course-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.course-card:hover .course-thumb img{transform:scale(1.05)}
.course-badge{position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:var(--r-sm);font-size:.7rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase}
.badge-popular{background:var(--accent-2);color:#fff}
.badge-new{background:var(--brand);color:#fff}
.badge-sale{background:var(--red);color:#fff}
.course-body{padding:16px}
.course-category{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--brand);margin-bottom:6px}
.course-title{font-size:1rem;font-weight:800;line-height:1.3;margin-bottom:6px;color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-desc{font-size:.82rem;color:var(--text-2);line-height:1.5;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-meta{display:flex;gap:12px;font-size:.75rem;color:var(--text-3);margin-bottom:12px}
.course-footer{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--brd-light)}
.course-price{display:flex;align-items:baseline;gap:8px}
.price-current{font-size:1.15rem;font-weight:900;color:var(--text-1)}
.price-original{font-size:.85rem;color:var(--text-3);text-decoration:line-through}
.course-actions{display:flex;gap:8px}
.btn-detail{width:36px;height:36px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;font-size:.9rem;background:var(--bg-2);transition:all .2s}
.btn-detail:hover{background:var(--brand-light);color:var(--brand)}
.btn-add-cart{padding:9px 14px;border-radius:var(--r-md);font-size:.85rem;font-weight:800;background:var(--brand);color:#fff;transition:all .2s}
.btn-add-cart:hover{background:var(--brand-hover)}
.btn-add-cart.added{background:var(--green);pointer-events:none}

/* TESTIMONIALS */
.testimonials{background:var(--bg-1)}
.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.testimonial-card{background:var(--bg-0);border:1px solid var(--brd);border-radius:var(--r-lg);padding:22px}
.testimonial-stars{color:#fbbf24;font-size:.9rem;margin-bottom:12px;letter-spacing:2px}
.testimonial-text{font-size:.9rem;color:var(--text-2);line-height:1.6;margin-bottom:14px;font-style:italic}
.testimonial-author{display:flex;align-items:center;gap:10px}
.testimonial-avatar{width:38px;height:38px;border-radius:50%;background:var(--brand-gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.8rem;font-weight:800;flex-shrink:0}
.testimonial-info .name{font-size:.88rem;font-weight:700;color:var(--text-1)}
.testimonial-info .role{font-size:.78rem;color:var(--text-3)}

/* FAQ */
.faq{background:var(--bg-0)}
.faq-list{max-width:720px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--brd)}
.faq-question{width:100%;text-align:left;padding:18px 0;font-size:.96rem;font-weight:800;color:var(--text-1);display:flex;justify-content:space-between;align-items:center;gap:12px;transition:color .2s}
.faq-question:hover{color:var(--brand)}
.faq-icon{font-size:1.2rem;color:var(--text-3);transition:transform .3s;flex-shrink:0}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--brand)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer p{padding:0 0 18px;font-size:.9rem;color:var(--text-2);line-height:1.7}

/* CONTACTO */
.contact{background:var(--bg-1)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.contact-info{display:flex;flex-direction:column;gap:18px}
.contact-item{display:flex;gap:14px;align-items:flex-start}
.contact-icon{width:42px;height:42px;border-radius:var(--r-md);background:var(--brand-light);display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0}
.contact-item strong{font-size:.9rem;color:var(--text-1);margin-bottom:2px}
.contact-item p,.contact-item a{font-size:.88rem;color:var(--text-2)}
.contact-item a:hover{color:var(--brand)}
.contact-form{display:flex;flex-direction:column;gap:12px}
.form-group{display:flex;flex-direction:column}
.form-input{padding:12px 14px;border:1.5px solid var(--brd);border-radius:var(--r-md);background:var(--bg-input);color:var(--text-1);font-size:.92rem;transition:border-color .2s}
.form-input:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--brand-light)}
textarea.form-input{resize:vertical;min-height:110px}

/* FOOTER */
.footer{background:var(--bg-2);padding:58px 0 0;border-top:1px solid var(--brd)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:38px;margin-bottom:38px}
.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1rem;margin-bottom:12px}
.footer-logo .fl-icon{width:30px;height:30px;background:var(--brand-gradient);border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800}
.footer-col p{font-size:.86rem;color:var(--text-2);line-height:1.6}
.footer-col h4{font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--text-3);margin-bottom:12px}
.footer-col a{display:block;font-size:.86rem;color:var(--text-2);padding:3px 0;transition:color .2s}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--brd);padding:18px 0;text-align:center;font-size:.8rem;color:var(--text-3)}

/* CART */
.cart-overlay{position:fixed;inset:0;background:var(--bg-overlay);z-index:2000;opacity:0;pointer-events:none;transition:opacity .3s}
.cart-overlay.active{opacity:1;pointer-events:auto}
.cart-sidebar{position:fixed;top:0;right:-400px;width:380px;max-width:92vw;height:100vh;background:var(--bg-modal);z-index:2001;display:flex;flex-direction:column;transition:right .3s;box-shadow:var(--shadow-l)}
.cart-sidebar.active{right:0}
.cart-header{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--brd)}
.cart-header h3{font-size:1rem;font-weight:800}
.cart-close{font-size:1.6rem;color:var(--text-3);padding:4px;transition:color .2s}
.cart-close:hover{color:var(--red)}
.cart-items{flex:1;overflow-y:auto;padding:14px}
.cart-empty{text-align:center;padding:38px 16px;color:var(--text-3)}
.cart-empty span{font-size:2rem;display:block;margin-bottom:6px}
.cart-item{display:flex;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid var(--brd-light)}
.cart-item-thumb{width:56px;height:42px;border-radius:var(--r-sm);overflow:hidden;flex-shrink:0}
.cart-item-info{flex:1;min-width:0}
.cart-item-name{font-size:.86rem;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cart-item-price{font-size:.82rem;color:var(--brand);font-weight:700}
.cart-item-remove{color:var(--text-3);font-size:1.05rem;padding:4px;transition:color .2s}
.cart-item-remove:hover{color:var(--red)}
.cart-footer{padding:18px 20px;border-top:1px solid var(--brd);flex-shrink:0}
.cart-total{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-size:1rem}
.cart-total strong{font-size:1.18rem;color:var(--brand)}

/* CART TOAST */
.cart-toast{position:fixed;bottom:88px;right:20px;background:var(--bg-1);border:2px solid var(--brand);border-radius:var(--r-lg);padding:14px 16px;box-shadow:var(--shadow-l);z-index:1500;transform:translateY(20px);opacity:0;pointer-events:none;transition:all .3s;max-width:300px;width:calc(100% - 40px)}
.cart-toast.show{transform:translateY(0);opacity:1;pointer-events:auto}
.cart-toast-header{display:flex;align-items:center;gap:8px;margin-bottom:10px;font-weight:800;color:var(--green);font-size:.86rem}
.cart-toast-actions{display:flex;gap:8px}
.cart-toast-actions .btn{flex:1;font-size:.8rem;padding:9px 10px}

/* MODALS */
.modal-overlay{position:fixed;inset:0;background:var(--bg-overlay);z-index:3000;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s;padding:18px}
.modal-overlay.active{opacity:1;pointer-events:auto}
.modal{background:var(--bg-modal);border-radius:var(--r-xl);width:100%;max-width:560px;max-height:90vh;overflow-y:auto;position:relative;padding:34px;transform:scale(.95) translateY(14px);transition:transform .3s}
.modal-overlay.active .modal{transform:scale(1) translateY(0)}
.modal-detail{max-width:620px}
.modal-close{position:absolute;top:14px;right:16px;font-size:1.8rem;color:var(--text-3);transition:color .2s}
.modal-close:hover{color:var(--red)}
.modal-header{text-align:center;margin-bottom:22px}
.modal-header h2{font-size:1.32rem;font-weight:800;margin-bottom:6px}
.modal-header p{color:var(--text-2);font-size:.9rem}

.checkout-summary{background:var(--bg-2);border-radius:var(--r-md);padding:16px;margin-bottom:16px}
.checkout-summary h4{margin-bottom:8px;font-size:.86rem}
.checkout-item{display:flex;justify-content:space-between;padding:8px 0;font-size:.84rem;border-bottom:1px solid var(--brd)}
.checkout-item:last-of-type{border-bottom:none}
.checkout-total{display:flex;justify-content:space-between;padding-top:10px;margin-top:10px;border-top:2px solid var(--brand);font-size:1rem}
.checkout-total strong{color:var(--brand)}

.qr-payment{text-align:center}
.qr-amount{font-size:1rem;margin-bottom:18px;padding:12px;background:var(--brand-light);border-radius:var(--r-md)}
.qr-amount strong{font-size:1.6rem;color:var(--brand);display:block;margin-top:4px}
.qr-container{position:relative;display:inline-block;margin-bottom:14px}
.qr-image{width:230px;height:230px;border-radius:var(--r-md);border:2px solid var(--brd)}
.qr-loading{position:absolute;inset:0;background:var(--bg-modal);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border-radius:var(--r-md)}
.spinner{width:34px;height:34px;border:3px solid var(--brd);border-top-color:var(--brand);border-radius:50%;animation:spin 1s linear infinite}
.spinner-sm{width:18px;height:18px;border:2px solid var(--brd);border-top-color:var(--brand);border-radius:50%;animation:spin 1s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.qr-instructions{text-align:left;font-size:.86rem;color:var(--text-2);margin:14px 0;padding:12px;background:var(--bg-2);border-radius:var(--r-md);line-height:1.7}
.payment-status{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px;background:var(--brand-light);border-radius:var(--r-md);font-size:.86rem;color:var(--brand);font-weight:700;margin-bottom:10px}
.payment-timer{font-size:.84rem;color:var(--text-3)}

.payment-success{text-align:center}
.success-icon{font-size:3.2rem;margin-bottom:10px}
.payment-success h2{font-size:1.4rem;margin-bottom:6px}
.payment-success p{color:var(--text-2);font-size:.9rem}
.success-details{background:var(--bg-2);border-radius:var(--r-md);padding:16px;margin:16px 0;text-align:left}
.success-email{margin:14px 0 20px;font-size:.88rem;color:var(--text-2)}

.detail-hero{width:calc(100% + 68px);margin:-34px -34px 0;height:240px;overflow:hidden;position:relative}
.detail-hero img{width:100%;height:100%;object-fit:cover}
.detail-hero-overlay{position:absolute;inset:0;background:linear-gradient(transparent 45%,var(--bg-modal))}
.detail-badge{position:absolute;top:14px;left:14px;padding:4px 12px;border-radius:var(--r-sm);font-size:.7rem;font-weight:800;text-transform:uppercase}
.detail-body{padding-top:14px}
.detail-category{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--brand);margin-bottom:6px}
.detail-title{font-size:1.5rem;font-weight:900;margin-bottom:10px;line-height:1.2}
.detail-desc{font-size:.88rem;color:var(--text-2);line-height:1.6;margin-bottom:16px}
.detail-features{list-style:none}
.detail-features li{padding:10px 0;font-size:.88rem;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--brd-light)}
.detail-features li:last-child{border-bottom:none}
.detail-meta{display:flex;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.detail-meta-item{display:flex;align-items:center;gap:5px;font-size:.82rem;color:var(--text-2)}
.detail-price-row{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-top:1px solid var(--brd)}
.detail-price{font-size:1.55rem;font-weight:900;color:var(--brand)}
.detail-price-original{font-size:.85rem;color:var(--text-3);text-decoration:line-through;margin-left:8px}

.whatsapp-float{position:fixed;bottom:22px;right:22px;width:52px;height:52px;background:#25d366;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;text-decoration:none;box-shadow:0 4px 14px rgba(37,211,102,.35);z-index:999;transition:transform .2s}
.whatsapp-float:hover{transform:scale(1.08)}
.whatsapp-float svg{width:26px;height:26px;fill:#fff}

@media(max-width:968px){
    .hero .container{grid-template-columns:1fr;text-align:center}
    .hero-visual{display:none}
    .hero-title{font-size:2.1rem}
    .hero-desc{margin:0 auto;max-width:520px}
    .hero-actions{justify-content:center}
    .nav-links{display:none;position:fixed;top:68px;left:0;right:0;background:var(--bg-nav);backdrop-filter:blur(16px);flex-direction:column;padding:16px;border-bottom:1px solid var(--brd);box-shadow:var(--shadow-l)}
    .nav-links.active{display:flex}
    .nav-menu-btn{display:flex}
    .contact-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
    .testimonials-grid{grid-template-columns:1fr}
}

@media(max-width:640px){
    .hero-title{font-size:1.75rem}
    .section-title{font-size:1.5rem}
    .courses-toolbar{flex-direction:column}
    .sort-select{width:100%}
    .courses-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .modal{padding:24px;border-radius:var(--r-lg)}
    .detail-hero{width:calc(100% + 48px);margin:-24px -24px 0}
}