:root {
    --primary-teal: #00A1B3;
    --dark-gray: #2D3436;
    --light-gray: #F8F9FA;
    --white: #FFFFFF;
}

/* ================= BASE ================= */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: var(--light-gray);
    color: #333;
}

section {
    padding: 70px 0;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    margin-top: 0;
}

/* ================= HEADER / NAV ================= */

header {
    background: #fff;
    box-shadow: 0 4px 18px rgba(0,0,0,.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--dark-gray);
}

.big-m {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-teal);
    margin-right: 10px;
}

.logo-text {
    font-weight: 700;
    line-height: 1.1;
}

.logo-text span {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: #777;
    margin-top: 2px;
}

/* Navigation */
nav ul {
    list-style: none;
    display: flex;
    gap: 28px;
    margin: 0;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    font-weight: 600;
    color: var(--dark-gray);
    transition: color .3s ease;
}

nav ul li a:hover {
    color: var(--primary-teal);
}

/* Hamburger */
.hamburger {
    display: none;
    font-size: 28px;
    cursor: pointer;
}

/* ================= MOBILE MENU ================= */
@media (max-width: 768px) {

    .hamburger {
        display: block;
    }

    nav ul {
        position: absolute;
        top: 72px;
        right: 0;
        background: #fff;
        flex-direction: column;
        width: 220px;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,.12);
        display: none;
    }

    nav ul.active {
        display: flex;
    }
}

/* ================= FOOTER ================= */
footer {
    background: var(--dark-gray);
    color: var(--white);
}

footer a {
    color: #aaa;
    text-decoration: none;
}

footer a:hover {
    color: var(--primary-teal);
}