:root {
    --fs-xs: 11px;   
    --fs-sm: 13px;  
    --fs-md: 16px;   
    --fs-lg: 1.2rem;  
    --fs-xl: 1.8rem;  
    --fs-xxl: 2.5rem;

    --primary-color: #58a6ff;
    --primary-glow: rgba(88, 166, 255, 0.5);
    --primary-bg-low: rgba(88, 166, 255, 0.1);
    --bg-dark: #0d1117;
    --bg-gradient: radial-gradient(circle at 50% 0%, #1a1f2c 0%, #0d1117 100%);
    --text-main: #e6edf3;
    --text-dim: #8b949e;

    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    --glass-bg: rgba(5, 7, 10, 0.82);
    --glass-border: rgba(255, 255, 255, 0.07);
    --glass-blur: blur(18px) saturate(160%);
    --glass-shadow: 0 4px 28px rgba(0, 0, 0, 0.65), 0 1px 0 rgba(255,255,255,0.04) inset;
}

body.theme-luxury {
    --primary-color: #d4af37;
    --primary-glow: rgba(212, 175, 55, 0.5);
    --primary-bg-low: rgba(212, 175, 55, 0.1);
    --bg-gradient: radial-gradient(circle at 50% 0%, #2c251a 0%, #0d1117 100%);
}

body.theme-cyber {
    --primary-color: #00e5ff;
    --primary-glow: rgba(0, 229, 255, 0.5);
    --primary-bg-low: rgba(0, 229, 255, 0.1);
    --bg-gradient: radial-gradient(circle at 30% 20%, #0a1a2e 0%, #050d1a 100%);
}
body.theme-crimson {
    --primary-color: #ff4d6d;
    --primary-glow: rgba(255, 77, 109, 0.5);
    --primary-bg-low: rgba(255, 77, 109, 0.1);
    --bg-gradient: radial-gradient(circle at 70% 10%, #1e0a0f 0%, #0d0509 100%);
}
body.theme-obsidian {
    --primary-color: #7c3aed;
    --primary-glow: rgba(124, 58, 237, 0.5);
    --primary-bg-low: rgba(124, 58, 237, 0.1);
    --bg-gradient: radial-gradient(circle at 50% 0%, #1a1030 0%, #080510 100%);
}
body.theme-emerald {
    --primary-color: #34d399;
    --primary-glow: rgba(52, 211, 153, 0.5);
    --primary-bg-low: rgba(52, 211, 153, 0.1);
    --bg-gradient: radial-gradient(circle at 20% 80%, #051a12 0%, #040d0a 100%);
}
body.theme-inferno {
    --primary-color: #f97316;
    --primary-glow: rgba(249, 115, 22, 0.5);
    --primary-bg-low: rgba(249, 115, 22, 0.1);
    --bg-gradient: radial-gradient(circle at 60% 0%, #1e0e04 0%, #0d0602 100%);
}
body.theme-phantom {
    --primary-color: #e2e8f0;
    --primary-glow: rgba(226, 232, 240, 0.3);
    --primary-bg-low: rgba(226, 232, 240, 0.06);
    --bg-gradient: radial-gradient(circle at 50% 50%, #1a1a1a 0%, #0a0a0a 100%);
}
body.theme-arctic {
    --primary-color: #38bdf8;
    --primary-glow: rgba(56, 189, 248, 0.5);
    --primary-bg-low: rgba(56, 189, 248, 0.1);
    --bg-gradient: radial-gradient(circle at 50% 100%, #061828 0%, #020d1a 100%);
}
body.theme-ember {
    --primary-color: #fb923c;
    --primary-glow: rgba(251, 146, 60, 0.5);
    --primary-bg-low: rgba(251, 146, 60, 0.1);
    --bg-gradient: radial-gradient(circle at 30% 30%, #1c1008 0%, #0e0804 100%);
}

html {
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100vh;
    background: var(--bg-gradient);
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-main);
    font-size: var(--fs-md);
    line-height: 1.6;
    box-sizing: border-box;
}

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


h1 { font-size: var(--fs-xxl); font-weight: 800; letter-spacing: -1px; margin-bottom: 1.5rem; }
h2 { font-size: var(--fs-xl); font-weight: 700; color: var(--primary-color); margin-bottom: 1.2rem; }
h3 { font-size: var(--fs-lg); font-weight: 600; margin-bottom: 1rem; }
p  { font-size: var(--fs-md); color: var(--text-main); margin-bottom: 1rem; }


.navbar-futurista {
    position: sticky;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    height: 70px;
    z-index: 1000;

    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);

    border-top: 1px solid rgba(88, 166, 255, 0.12);

    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.navbar-futurista.scrolled {
    background: rgba(3, 5, 8, 0.92);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.75), 0 1px 0 rgba(255,255,255,0.04) inset;
    border-bottom-color: rgba(88, 166, 255, 0.15);
}

.logo-contenedor {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-contenedor h2 {
    margin: 0;
    font-family: var(--font-main);
    color: var(--primary-color);
    font-size: var(--fs-lg) !important;
    font-weight: bold;
    text-shadow: 0 0 10px var(--primary-glow);
    letter-spacing: 1px;
}

.logo-contenedor img {
    height: 35px; 
    width: auto;
    filter: drop-shadow(0 0 5px var(--primary-glow)); 
}

.menu-opciones {
    display: flex;
    gap: 20px; 
    align-items: center;
}

.nav-link-futurista {
    font-family: var(--font-main);
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    transition: all 0.3s ease;
    padding: 6px 12px;
    border-radius: 4px;
}

.nav-link-futurista:hover {
    color: var(--primary-color);
    text-shadow: 0 0 8px var(--primary-glow);
    background: var(--primary-bg-low);
}

.btn-agendar-nav {
    background: var(--primary-color) !important;
    color: var(--bg-dark) !important;
    border: 1px solid var(--primary-color) !important;
    font-weight: 700;
    padding: 8px 18px !important;
    border-radius: 6px !important;
    box-shadow:
        0 0 12px var(--primary-glow),
        0 0 28px rgba(88, 166, 255, 0.25),
        inset 0 1px 0 rgba(255,255,255,0.2);
    transition: all 0.25s ease;
    letter-spacing: 0.5px;
}

.btn-agendar-nav:hover {
    background: #fff !important;
    color: #0d1117 !important;
    border-color: #fff !important;
    box-shadow:
        0 0 20px var(--primary-glow),
        0 0 40px rgba(88, 166, 255, 0.35);
    transform: translateY(-1px);
}


.btn-menu-movil {
    display: none;
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.6rem;
    cursor: pointer;
    padding: 5px;
    outline: none;
}

@media (max-width: 992px) {
    :root {
        --fs-xxl: 2rem;
        --fs-xl: 1.5rem;
        --fs-lg: 1.1rem;
    }

    .navbar-futurista {
        padding: 12px 5%;
        height: auto;
        min-height: 65px;
        position: sticky;
        background: rgba(5, 7, 10, 0.88);
        backdrop-filter: var(--glass-blur);
        -webkit-backdrop-filter: var(--glass-blur);
    }

    .btn-menu-movil {
        display: block !important; 
    }

    .menu-opciones {
        display: none; 
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100vw;
        background: rgba(4, 6, 9, 0.94);
        backdrop-filter: blur(24px) saturate(180%);
        -webkit-backdrop-filter: blur(24px) saturate(180%);
        border-bottom: 1px solid var(--glass-border);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);

        padding: 10px 0;
        border-top: 1px solid rgba(88, 166, 255, 0.1);
        gap: 0;
        overflow: hidden;
    }

    .menu-opciones.abierto {
        display: flex;
    }

    .nav-link-futurista {
        display: block;
        width: 100%;
        padding: 15px 25px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        text-align: left;
        border-radius: 0;
        font-size: var(--fs-md); 
    }

    .btn-agendar-nav {
        display: block !important;
        width: calc(100% - 40px) !important; 
        margin: 15px auto !important; 
        text-align: center !important;
        padding: 14px 10px !important;
        white-space: normal !important;
        border-radius: 8px !important;
        box-shadow:
            0 0 16px var(--primary-glow),
            0 0 32px rgba(88, 166, 255, 0.2) !important;
    }
}

@media (min-width: 993px) {
    .menu-opciones {
        display: flex !important;
        position: static;
        width: auto;
        background: transparent;
        padding: 0;
        border: none;
        backdrop-filter: none;
        overflow: visible;
    }
}