.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 101;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--ink);
    transition: all 0.3s;
    transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px; right: 0;
    width: 260px;
    background: var(--paper);
    z-index: 99;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem 2rem;
    gap: 0;
    box-shadow: -4px 8px 30px rgba(0,0,0,0.12);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--muted);
    text-decoration: none;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.9rem 0;
    width: 100%;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: color 0.3s;
}

.mobile-menu a:last-of-type { border-bottom: none; }

.mobile-menu a:hover,
.mobile-menu a.active { color: var(--blue); }

.mobile-menu-footer {
    position: static;
    margin-top: 1.2rem;
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(0,0,0,0.2);
}

@media (max-width: 600px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }
}

/* ── WHATSAPP FLOAT ── */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(37,211,102,0.4);
    z-index: 999;
    transition: transform 0.3s, box-shadow 0.3s;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(37,211,102,0.55);
}

.whatsapp-float i {
    font-size: 1.6rem;
    color: #fff;
}

.whatsapp-float .tooltip {
    position: absolute;
    right: 68px;
    background: var(--ink);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.4rem 0.9rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    letter-spacing: 0.05em;
}

.whatsapp-float .tooltip::after {
    content: '';
    position: absolute;
    top: 50%; right: -6px;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: var(--ink);
    border-right: none;
}

.whatsapp-float:hover .tooltip {
    opacity: 1;
}