/* VARIABLES GLOBALES */
:root {
    --primary-green: #a2ff00;
    --dark-bg: #050a12;
    --card-border: rgba(0, 255, 255, 0.3);
}

/* BASE */
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: radial-gradient(circle at top, #1a2a44 0%, #050a12 100%);
    color: white;
    text-align: center;
    overflow-x: hidden;
}

/* HEADER - UNIFICADO */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1000;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-green);
    text-shadow: 0 0 10px var(--primary-green);
}

.nav-center {
    display: flex;
    gap: 20px;
}

/* Centrado en PC */
@media (min-width: 769px) {
    .nav-center {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
}

.nav-center a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    transition: 0.3s;
}

.nav-center a:hover, .nav-center a.active {
    color: var(--primary-green);
}

.social-icons a {
    color: var(--primary-green);
    font-size: 1.3rem;
    margin-left: 15px;
    transition: 0.3s;
    text-decoration: none;
}

/* HERO SECTION - Imagen Agrandada */
.hero { padding: 40px 20px; }

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.bird-img {
    width: 80%;
    max-width: 480px; /* Agrandada según tu pedido */
    height: auto;
    margin-bottom: 20px;
}

/* COUNTDOWN RESPONSIVE */
.countdown {
    font-size: clamp(2.5rem, 10vw, 100px); 
    font-weight: bold;
    color: var(--primary-green);
    text-shadow: 0 0 15px rgba(162, 255, 0, 0.5);
    margin: 10px 0;
}

/* RECOMPENSAS Y FORMULARIO */
.rewards-container {
    border: 2px solid var(--card-border);
    background: rgba(0, 40, 60, 0.4);
    border-radius: 20px;
    padding: 40px 20px;
    margin: 50px auto;
    max-width: 900px;
}

.cards { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.reward-card img { width: 250px; }

form {
    max-width: 600px;
    width: 90%;
    margin: 0 auto 100px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    padding: 30px;
    border-radius: 15px;
    text-align: left;
}

input, select {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid #444;
    color: white;
    border-radius: 5px;
    box-sizing: border-box;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: var(--primary-green);
    color: black;
    border: none;
    font-weight: bold;
    border-radius: 30px;
    cursor: pointer;
}

/* FOOTER */
footer { background: rgba(0, 0, 0, 0.8); padding: 30px; border-top: 1px solid #333; }

/* MEDIA QUERY CELULAR - Header idéntico */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
    }
    .nav-center { order: 2; }
    .logo { order: 1; }
    .social-icons { order: 3; margin-left: 0; }
}