/* Variables y Configuración Global */
:root {
    --color-gold: #D4AF37;
    --color-gold-light: #F4E4A6;
    --color-dark-navy: #0F172A;
    --color-navy-light: #1E293B;
    --color-text-muted: #64748B;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

body {
    font-family: var(--font-body);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .navbar-brand, .btn {
    font-family: var(--font-heading);
}

/* Colores Personalizados */
.text-gold {
    color: var(--color-gold) !important;
}

.bg-gold {
    background-color: var(--color-gold) !important;
}

.text-dark-navy {
    color: var(--color-dark-navy) !important;
}

.bg-dark-navy {
    background-color: var(--color-dark-navy) !important;
}

.btn-gold {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-dark-navy);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-gold:hover {
    background-color: var(--color-gold-light);
    border-color: var(--color-gold-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
    color: var(--color-dark-navy);
}

.btn-outline-dark-navy {
    border: 2px solid var(--color-dark-navy);
    color: var(--color-dark-navy);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline-dark-navy:hover {
    background-color: var(--color-dark-navy);
    color: white;
}

/* Navegación */
#mainNav {
    transition: all 0.4s ease;
    padding: 1.5rem 0;
}

#mainNav.navbar-scrolled {
    background-color: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(10px);
    padding: 0.75rem 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.logo-brand-sm {
    max-width: 15rem;
}

.glass {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.brand-icon {
    width: 32px;
    height: 32px;
    color: var(--color-gold);
}

.nav-link {
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after, 
.nav-link.active::after {
    width: 80%;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 41, 59, 0.8)), 
                url('http://static.photos/office/1920x1080/42');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    padding-block: 8rem;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(15, 23, 42, 0.4) 100%);
}

.z-2 {
    z-index: 2;
}

.hero-title {
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    line-height: 1.2;
}

.text-white-80 {
    color: rgba(255, 255, 255, 0.8);
}

.text-white-75 {
    color: rgba(255, 255, 255, 0.75);
}

.text-white-60 {
    color: rgba(255, 255, 255, 0.6);
}

.tracking-wider {
    letter-spacing: 0.1em;
}

.stats-row {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 2rem;
    margin-top: 2rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

/* Agenda Section */
.py-6 {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

.agenda-tabs .nav-link {
    color: var(--color-dark-navy);
    font-weight: 600;
    border: 2px solid transparent;
    margin: 0 0.5rem;
}

.agenda-tabs .nav-link.active {
    background-color: var(--color-dark-navy);
    color: white;
    border-color: var(--color-dark-navy);
}

.agenda-card {
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.agenda-card:hover {
    transform: translateY(-5px);
    border-left: 4px solid var(--color-gold);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1) !important;
}

.letter-spacing-2 {
    letter-spacing: 0.2em;
}

/* Speakers Section */
.speaker-card {
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.speaker-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.speaker-img {
    height: 280px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.speaker-card:hover .speaker-img {
    transform: scale(1.05);
}

.speaker-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.speaker-card:hover .speaker-overlay {
    opacity: 1;
}

.small-icon {
    width: 16px;
    height: 16px;
}

/* Registro Section */
.transform-skew {
    transform: skewX(-15deg) translateX(20%);
}

.shadow-2xl {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.form-control:focus, .form-select:focus {
    box-shadow: 0 0 0 0.25rem rgba(212, 175, 55, 0.25);
    border-color: var(--color-gold);
}

/* Footer */
.hover-gold {
    transition: color 0.3s ease;
}

.hover-gold:hover {
    color: var(--color-gold) !important;
}

.social-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background-color: var(--color-gold);
    border-color: var(--color-gold);
    color: var(--color-dark-navy);
    transform: translateY(-3px);
}

.placeholder-white-50::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive Adjustments */
@media (max-width: 991.98px) {
    .hero-title {
        font-size: 2.5rem;
    }
    .navbar-collapse {
        background-color: rgba(15, 23, 42, 0.98);
        padding: 1rem;
        border-radius: 1rem;
        margin-top: 1rem;
    }
    .transform-skew {
        display: none;
    }
}

@media (max-width: 767.98px) {
    .hero-section {
        background-attachment: scroll;
    }
    .display-5 {
        font-size: 2rem;
    }
    .agenda-tabs .nav-link {
        margin: 0.25rem;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}

/* Animaciones de entrada */
.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}