* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* VIDEO BACKGROUND */
.bg-video {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
    filter: brightness(0.3) contrast(1.2);
}

/* Overlay financiero */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: radial-gradient(
        circle at top,
        rgba(0, 255, 200, 0.1),
        rgba(0, 0, 0, 0.85)
    );
    z-index: -1;
}

body {
    font-family: "Segoe UI", Arial, sans-serif;
    color: #e6fff8;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}


/* HEADER */
.header {
    background-color: var(--black);
    color: var(--white);
    text-align: center;
    padding: 3rem 1.5rem;
}

.header h1 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: 2px;
}

.header p {
    margin-top: 0.8rem;
    font-size: 1.1rem;
    opacity: 0.85;
}

/* NAV */
.nav {
    background-color: var(--black);
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.nav a {
    color: var(--white);
    font-weight: 500;
    transition: opacity 0.3s ease;
}

/* LAYOUT */
main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* CONTENEDOR 3D */
.container {
    background: rgba(12, 22, 26, 0.55);
    backdrop-filter: blur(16px);
    border-radius: 18px;
    padding: 48px 56px;
    text-align: center;
    border: 1px solid rgba(0, 255, 200, 0.15);
    box-shadow:
        0 30px 60px rgba(0, 0, 0, 0.7),
        inset 0 0 30px rgba(0, 255, 200, 0.1);
}

/* TITULO */
h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    letter-spacing: 6px;
    margin-bottom: 14px;
    text-shadow: 0 0 18px rgba(0, 255, 200, 0.35);
}

/* SUBTITULO CASI INVISIBLE */
p {
    font-size: 0.85rem;
    opacity: 0.45;
    margin-bottom: 36px;
}

/* TIMER MINIMAL */
.timer {
    display: flex;
    gap: 14px;
    justify-content: center;
}

.timer div {
    min-width: 64px;
    padding: 14px 10px;
    background: linear-gradient(
        180deg,
        rgba(0, 255, 200, 0.15),
        rgba(0, 0, 0, 0.4)
    );
    border-radius: 10px;
    box-shadow:
        inset 0 0 10px rgba(0, 255, 200, 0.25),
        0 8px 18px rgba(0, 0, 0, 0.6);
}

.timer span {
    font-size: 1.8rem;
    font-weight: 600;
    color: #9fffe8;
    text-shadow: 0 0 10px rgba(0, 255, 200, 0.6);
}

.timer small {
    font-size: 0.55rem;
    opacity: 0.25;
    letter-spacing: 1px;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 14px;
    font-size: 0.75rem;
    opacity: 0.4;
}

/* RESPONSIVE */
@media (max-width: 480px) {
    .container {
        padding: 36px 28px;
    }

    .timer span {
        font-size: 1.5rem;
    }
}