:root {
    --primary-color: #6A1B32;
    --secondary-color: #BC955C;
    --accent-color: #7D213B;
    --text-color: #333333;
    --bg-color: #ffffff;
    --alt-bg-color: #f4f4f4;
    --deep-guinda: #4A1022;
    --soft-guinda: rgba(106, 27, 50, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.92);
    --transition: all 0.28s ease;
    --shadow: 0 18px 50px rgba(106, 27, 50, 0.14);
    --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.08);
    --radius-xl: 28px;
    --radius-lg: 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    background: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
h1, h2, h3, .accent { font-family: 'Outfit', sans-serif; font-weight: 800; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 1rem 0;
}
header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-soft);
    padding: 0.45rem 0;
}
.nav-shell { display: flex; justify-content: space-between; align-items: center; gap: 2rem; }
.logo { display: inline-flex; align-items: center; text-decoration: none; }
.logo img { height: 64px; width: auto; transition: var(--transition); }
header.scrolled .logo img { height: 54px; }
.nav-links { display: flex; align-items: center; list-style: none; gap: 1.35rem; }
.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 800;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: var(--transition);
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 0;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 999px;
    transition: var(--transition);
}
.nav-links a:hover { color: var(--primary-color); }
.nav-links a:hover::after { width: 100%; }
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 12px;
    background: var(--primary-color);
    cursor: pointer;
    padding: 10px;
}
.menu-toggle span { display: block; height: 3px; background: #fff; margin: 5px 0; border-radius: 99px; }

.hero-section {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    color: white;
    background:
        linear-gradient(135deg, rgba(74,16,34,0.94), rgba(106,27,50,0.9)),
        url('hero_bg.png') center/cover no-repeat;
    overflow: hidden;
    padding: 8rem 0 5rem;
}
.hero-overlay { position: absolute; inset: 0; background: radial-gradient(circle at 50% 20%, rgba(188,149,92,0.28), transparent 35%); }
.hero-orbit { position: absolute; border: 1px solid rgba(188,149,92,0.35); border-radius: 50%; opacity: 0.55; }
.hero-orbit-one { width: 460px; height: 460px; right: -120px; top: 18%; }
.hero-orbit-two { width: 260px; height: 260px; left: -80px; bottom: 10%; }
.hero-content { position: relative; z-index: 1; text-align: center; }
.event-badge {
    display: inline-flex;
    padding: 0.55rem 1rem;
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 999px;
    background: rgba(255,255,255,0.09);
    backdrop-filter: blur(8px);
    font-weight: 800;
    letter-spacing: 0.03em;
    margin-bottom: 1.2rem;
}
.hero-section h1 { font-size: clamp(3.2rem, 8vw, 6.6rem); line-height: 0.95; margin-bottom: 0.75rem; }
.hero-section .accent { color: var(--secondary-color); }
.subtitle { font-size: clamp(1.45rem, 3vw, 2.4rem); font-weight: 300; margin-bottom: 1.2rem; }
.description { font-size: 1.16rem; max-width: 760px; margin: 0 auto 2.6rem; opacity: 0.94; }
.hero-btns { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0.9rem 1.75rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 0.82rem;
}
.btn-primary { background: var(--secondary-color); color: white; box-shadow: 0 14px 28px rgba(188,149,92,0.27); }
.btn-primary:hover { background: #a68350; transform: translateY(-3px); }
.btn-secondary { background: transparent; border: 2px solid rgba(255,255,255,0.9); color: white; }
.btn-secondary:hover { background: white; color: var(--primary-color); transform: translateY(-3px); }
.hero-stats { display: grid; grid-template-columns: repeat(3, minmax(110px, 1fr)); gap: 1rem; max-width: 560px; margin: 3rem auto 0; }
.hero-stats article { padding: 1.1rem; border-radius: 18px; background: rgba(255,255,255,0.09); border: 1px solid rgba(255,255,255,0.18); backdrop-filter: blur(8px); }
.hero-stats strong { display: block; font-family: 'Outfit'; font-size: 2.4rem; color: var(--secondary-color); line-height: 1; }
.hero-stats span { display: block; font-weight: 800; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.08em; margin-top: 0.3rem; }

.section { padding: 7rem 0; }
.alt-bg { background: linear-gradient(180deg, var(--alt-bg-color), #fff); }
.section-heading { max-width: 760px; margin: 0 auto 3.5rem; text-align: center; }
.section-heading p { font-size: 1.05rem; color: #666; }
.eyebrow { display: inline-block; color: var(--secondary-color); font-weight: 900; text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.78rem; margin-bottom: 0.65rem; }
.section-title { font-size: clamp(2.25rem, 5vw, 3.4rem); text-align: center; margin-bottom: 1.1rem; position: relative; color: var(--primary-color); }
.light-heading .section-title, .light-heading p { color: white; }
.light-heading .eyebrow { color: var(--secondary-color); }

.speakers-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem; }
.speaker-card {
    display: grid;
    grid-template-columns: 112px 1fr;
    gap: 1.25rem;
    align-items: center;
    background: white;
    padding: 1.4rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(106,27,50,0.08);
}
.speaker-card:hover { transform: translateY(-7px); }
.speaker-img { width: 104px; height: 104px; border-radius: 28px; overflow: hidden; background: #eee; border: 4px solid var(--alt-bg-color); }
.img-placeholder { width: 100%; height: 100%; display: grid; place-items: center; color: white; font-family: 'Outfit'; font-weight: 900; font-size: 1.6rem; background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); }
.speaker-card h3 { color: var(--primary-color); margin: 0.45rem 0; line-height: 1.14; }
.speaker-role { color: var(--secondary-color); font-weight: 900; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.55rem; }
.speaker-bio { font-size: 0.94rem; color: #666; }
.time-pill { display: inline-flex; width: fit-content; padding: 0.35rem 0.65rem; border-radius: 999px; background: var(--soft-guinda); color: var(--primary-color); font-weight: 900; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.05em; }

.poster-layout { display: grid; grid-template-columns: 0.9fr 1.2fr; gap: 1.5rem; align-items: stretch; }
.poster-feature, .poster-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid rgba(106,27,50,0.08);
}
.poster-feature { padding: 2rem; display: flex; flex-direction: column; justify-content: center; }
.poster-feature h3 { color: var(--primary-color); font-size: 2rem; margin: 1rem 0; }
.text-link { color: var(--primary-color); font-weight: 900; margin-top: 1.4rem; display: inline-block; }
.poster-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.poster-card { padding: 1.5rem; min-height: 170px; transition: var(--transition); position: relative; overflow: hidden; }
.poster-card::after { content: ''; position: absolute; width: 90px; height: 90px; border-radius: 50%; background: var(--soft-guinda); right: -20px; top: -20px; }
.poster-card:hover { transform: translateY(-6px); }
.poster-card span { color: var(--secondary-color); font-weight: 900; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.11em; }
.poster-card strong { display: block; color: var(--primary-color); font-family: 'Outfit'; font-size: 3rem; line-height: 1; margin: 0.8rem 0; }
.poster-card p { color: #666; font-weight: 700; }

.prototype-section { background: linear-gradient(135deg, var(--deep-guinda), var(--primary-color)); position: relative; overflow: hidden; }
.prototype-section::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 10% 20%, rgba(188,149,92,0.22), transparent 28%), radial-gradient(circle at 90% 80%, rgba(188,149,92,0.18), transparent 32%); }
.prototype-section .container { position: relative; z-index: 1; }
.prototype-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.prototype-card {
    min-height: 270px;
    padding: 1.8rem;
    border-radius: var(--radius-xl);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.18);
    color: white;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}
.prototype-card:hover { transform: translateY(-8px); background: rgba(255,255,255,0.12); }
.prototype-number { color: var(--secondary-color); font-family: 'Outfit'; font-weight: 900; font-size: 2.6rem; }
.prototype-card h3 { margin: 1.2rem 0 0.8rem; font-size: 1.55rem; }
.prototype-card p { opacity: 0.88; }

.program-actions { text-align: center; margin-bottom: 2rem; }
.tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 2.2rem; }
.tab-button {
    border: 1px solid rgba(106,27,50,0.16);
    background: white;
    color: var(--primary-color);
    border-radius: 999px;
    padding: 0.9rem 1.25rem;
    font-weight: 900;
    cursor: pointer;
    transition: var(--transition);
}
.tab-button.active, .tab-button:hover { background: var(--primary-color); color: white; }
.timeline-panel { max-width: 900px; margin: 0 auto; }
.timeline-item {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 1.25rem;
    padding: 1.3rem;
    margin-bottom: 1rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border-left: 6px solid var(--secondary-color);
}
.timeline-item time { color: var(--primary-color); font-weight: 900; font-size: 1.1rem; padding-top: 0.25rem; }
.timeline-item span { color: var(--secondary-color); font-weight: 900; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.09em; }
.timeline-item h3 { color: var(--primary-color); margin: 0.2rem 0; }
.timeline-item p { color: #666; }

.registro-wrapper { display: grid; grid-template-columns: 1.05fr 0.95fr; align-items: center; gap: 3rem; }
.registro-text .section-title { text-align: left; }
.registro-text p { color: #555; font-size: 1.05rem; }
.registro-list { margin: 1.8rem 0 2.4rem; list-style: none; }
.registro-list li { padding-left: 34px; position: relative; margin-bottom: 1rem; font-weight: 800; }
.registro-list li::before { content: '✓'; position: absolute; left: 0; top: -2px; color: var(--secondary-color); font-weight: 900; font-size: 1.2rem; }
.registro-img { display: flex; justify-content: center; }
.mascot-img { max-width: min(420px, 100%); filter: drop-shadow(0 24px 36px rgba(0,0,0,0.18)); animation: float 6s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }

footer { background: #111; color: white; padding: 4.5rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1fr 1.2fr 0.8fr; gap: 3rem; margin-bottom: 3rem; }
.footer-logo { height: 62px; width: auto; margin-bottom: 1rem; filter: brightness(0) invert(1); }
.footer h3 { margin-bottom: 1rem; font-size: 1.15rem; color: var(--secondary-color); }
.footer p { color: rgba(255,255,255,0.75); }
.footer-link { color: white; font-weight: 900; text-decoration-color: var(--secondary-color); }
.footer-bottom { text-align: center; padding-top: 1.8rem; border-top: 1px solid #333; font-size: 0.9rem; opacity: 0.68; }

.fade-in { opacity: 0; transform: translateY(26px); transition: opacity 0.75s ease, transform 0.75s ease; }
.fade-in.appear { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
    .menu-toggle { display: block; }
    .nav-links {
        position: absolute;
        top: calc(100% + 0.65rem);
        right: 2rem;
        left: 2rem;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 1.2rem;
        border-radius: 22px;
        background: rgba(255,255,255,0.98);
        box-shadow: var(--shadow);
    }
    .nav-links.active { display: flex; }
    .nav-links a { display: block; padding: 0.65rem 0; }
    .speakers-grid, .poster-layout, .registro-wrapper, .footer-grid { grid-template-columns: 1fr; }
    .prototype-grid { grid-template-columns: 1fr; }
    .registro-img { order: -1; }
}

@media (max-width: 640px) {
    .container { padding: 0 1.1rem; }
    .section { padding: 5rem 0; }
    .hero-section { min-height: auto; padding-top: 7.5rem; }
    .hero-stats { grid-template-columns: 1fr; }
    .speaker-card { grid-template-columns: 1fr; text-align: center; }
    .speaker-img { margin: 0 auto; }
    .poster-grid { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 1fr; }
    .btn { width: 100%; }
    .hero-btns { width: 100%; }
}

.program-accordion { display: grid; gap: 1rem; }
.program-category {
    background: white;
    border: 1px solid rgba(106,27,50,0.10);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}
.program-category summary {
    list-style: none;
    cursor: pointer;
    padding: 1.2rem 1.35rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--primary-color);
    font-weight: 900;
    font-family: 'Outfit', sans-serif;
    position: relative;
}
.program-category summary::-webkit-details-marker { display: none; }
.program-category summary::after {
    content: '+';
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    flex: 0 0 34px;
    color: white;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    font-size: 1.25rem;
    line-height: 1;
    transition: var(--transition);
}
.program-category[open] summary::after { content: '–'; transform: rotate(180deg); }
.program-category summary small {
    margin-left: auto;
    color: var(--secondary-color);
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.program-list {
    padding: 0 1.2rem 1.2rem;
    display: grid;
    gap: 0.75rem;
}
.program-list.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.program-event {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1rem;
    align-items: start;
    padding: 1rem;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(248,244,238,0.86), #fff);
    border-left: 4px solid var(--secondary-color);
}
.compact-list .program-event { grid-template-columns: 108px 1fr; }
.program-event time {
    color: var(--primary-color);
    font-weight: 900;
    font-size: 0.88rem;
    line-height: 1.25;
}
.program-event strong { color: var(--primary-color); display: block; margin-bottom: 0.25rem; }
.program-event p { color: #666; font-size: 0.92rem; margin: 0; line-height: 1.45; }

.ponente-line {
    display: block;
    color: var(--primary-color);
    font-weight: 800;
    margin-bottom: 0.28rem;
}
.ponente-line b {
    color: var(--secondary-color);
    font-weight: 900;
}


@media (max-width: 980px) {
    .program-list.two-columns { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .program-category summary { align-items: flex-start; flex-direction: column; }
    .program-category summary::after { position: absolute; right: 1rem; top: 1rem; }
    .program-category summary small { margin-left: 0; padding-right: 2.6rem; }
    .program-event, .compact-list .program-event { grid-template-columns: 1fr; }
}