/* ---------- RESET & BASE ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: #0f0f0f;
    color: #e5e5e5;
    padding-top: 80px;
    padding-bottom: 40px;
    transition: background 0.4s ease, color 0.4s ease;
}

/* ---------- SCROLLBAR STYLING ---------- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #1a1a1a;
}
::-webkit-scrollbar-thumb {
    background: #3b82f6;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #2563eb;
}

/* ---------- HEADER ---------- */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(15, 15, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
    z-index: 1000;
}

.logo {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #3b82f6, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav {
    display: flex;
    gap: 4px;
}

nav button {
    background: transparent;
    border: none;
    color: #888;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Inter', sans-serif;
}

nav button:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

nav button.active {
    color: #fff;
    background: rgba(59, 130, 246, 0.2);
    box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.3);
}

/* ---------- WHATSAPP FIXED ---------- */
#whatsapp-fixed {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #25D366;
    color: #fff;
    font-weight: 600;
    padding: 14px 24px;
    border-radius: 60px;
    text-decoration: none;
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.35);
    z-index: 999;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
    font-size: 0.95rem;
}

#whatsapp-fixed:hover {
    transform: scale(1.06);
    box-shadow: 0 8px 40px rgba(37, 211, 102, 0.5);
}

/* ---------- MODAL ---------- */
#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

#modal-overlay.open {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

#modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    height: 85vh;
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.8);
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.6rem;
    cursor: pointer;
    z-index: 10;
    transition: background 0.2s, transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#modal-close:hover {
    background: rgba(255, 0, 0, 0.7);
    transform: rotate(90deg);
}

#modal-iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ---------- RESPONSIVE HEADER ---------- */
@media (max-width: 700px) {
    #main-header {
        padding: 0 16px;
        flex-wrap: wrap;
        height: auto;
        padding-top: 12px;
        padding-bottom: 12px;
        gap: 8px;
    }
    nav {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
        width: 100%;
    }
    nav button {
        font-size: 0.75rem;
        padding: 4px 12px;
        flex: 1;
        min-width: 60px;
        text-align: center;
    }
    body {
        padding-top: 110px;
    }
    #whatsapp-fixed {
        bottom: 16px;
        right: 16px;
        padding: 12px 18px;
        font-size: 0.85rem;
    }
    #modal-content {
        width: 95%;
        height: 80vh;
        border-radius: 12px;
    }
}