:root {
    --color-primary: #1a237e;
    --color-primary-light: #3949ab;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f5;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-accent: #00c853;
    --color-border: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --radius: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); color: var(--color-text); line-height: 1.6; background: var(--color-bg); }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
.material-icons { font-size: 24px; vertical-align: middle; }

.container { width: 90%; max-width: var(--container-width); margin: 0 auto; }
.section { padding: var(--spacing-lg) 0; }
.section__title { font-size: clamp(1.6rem, 4vw, 2.2rem); margin-bottom: var(--spacing-sm); text-align: center; color: var(--color-primary); }
.section__subtitle { text-align: center; color: var(--color-text-light); margin-bottom: var(--spacing-md); max-width: 700px; margin-left: auto; margin-right: auto; }

/* Header */
.header { background: var(--color-bg); box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 100; }
.header__container { display: flex; justify-content: space-between; align-items: center; padding: var(--spacing-sm) 0; }
.header__logo { font-size: 1.5rem; font-weight: 700; color: var(--color-primary); }
.nav__list { display: flex; gap: 1.5rem; align-items: center; }
.nav__link { display: flex; align-items: center; gap: 0.4rem; font-weight: 500; padding: 0.5rem; border-radius: var(--radius); }
.nav__link:hover { background: var(--color-bg-alt); color: var(--color-primary); }
.nav__toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; border-radius: 50%; }
.nav__toggle:hover { background: var(--color-bg-alt); }

/* Hero */
.hero { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); color: white; padding: var(--spacing-lg) 0; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: var(--spacing-xs); line-height: 1.2; }
.hero__subtitle { font-size: 1rem; letter-spacing: 2px; margin-bottom: var(--spacing-sm); opacity: 0.9; font-weight: 500; }
.hero__text { max-width: 600px; margin: 0 auto var(--spacing-md); font-size: 1.1rem; opacity: 0.95; }
.hero__cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.9rem 1.6rem; border-radius: var(--radius); font-weight: 600; cursor: pointer; text-align: center; transition: var(--transition); border: 2px solid transparent; min-height: 48px; }
.btn--primary { background: var(--color-accent); color: white; }
.btn--primary:hover { background: #00a844; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--secondary { background: transparent; border-color: rgba(255,255,255,0.5); color: white; }
.btn--secondary:hover { background: rgba(255,255,255,0.15); border-color: white; }
.btn--outline { border-color: var(--color-primary); color: var(--color-primary); width: 100%; margin-top: auto; }
.btn--outline:hover { background: var(--color-primary); color: white; transform: translateY(-2px); }
.btn--full { width: 100%; }

/* Fleet */
.fleet__grid { display: grid; gap: var(--spacing-md); }
.fleet__card { background: white; border-radius: var(--radius); box-shadow: var(--shadow-md); overflow: hidden; display: flex; flex-direction: column; transition: var(--transition); }
.fleet__card:hover { transform: translateY(-6px); box-shadow: 0 12px 24px rgba(0,0,0,0.15); }
.fleet__image { width: 100%; height: 220px; object-fit: cover; }
.fleet__content { padding: var(--spacing-md); flex-grow: 1; display: flex; flex-direction: column; gap: 0.5rem; }
.fleet__tag { background: var(--color-primary-light); color: white; padding: 0.3rem 0.8rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; width: fit-content; }
.fleet__content h3 { font-size: 1.3rem; color: var(--color-primary); margin-top: var(--spacing-xs); }
.fleet__content p { color: var(--color-text-light); font-size: 0.95rem; margin-bottom: var(--spacing-xs); }
.fleet__features { margin-bottom: var(--spacing-sm); }
.fleet__features li { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.4rem; font-size: 0.9rem; color: var(--color-text); }
.fleet__features .material-icons { font-size: 1.1rem; color: var(--color-primary-light); }

/* Differentials */
.differentials__grid { display: grid; gap: var(--spacing-md); text-align: center; }
.diff__item { background: var(--color-bg-alt); padding: var(--spacing-md); border-radius: var(--radius); transition: var(--transition); }
.diff__item:hover { background: #e8eaf6; transform: scale(1.02); }
.diff__icon { font-size: 3rem; color: var(--color-primary); margin-bottom: var(--spacing-sm); }
.diff__item h3 { margin-bottom: 0.5rem; color: var(--color-primary); font-size: 1.2rem; }
.diff__item p { color: var(--color-text-light); font-size: 0.95rem; }

/* Quote Section */
.quote { background: var(--color-bg-alt); }
.quote__container { display: grid; gap: var(--spacing-lg); align-items: start; }
.quote__info h2 { text-align: left; }
.quote__info p { margin-bottom: var(--spacing-md); color: var(--color-text-light); max-width: none; margin-left: 0; }
.quote__contact { display: flex; flex-direction: column; gap: 0.8rem; margin-top: var(--spacing-md); }
.contact__item { display: flex; align-items: center; gap: 0.8rem; font-weight: 500; background: white; padding: 0.8rem 1rem; border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.contact__item .material-icons { color: var(--color-primary); }
.quote__form { background: white; padding: var(--spacing-md); border-radius: var(--radius); box-shadow: var(--shadow-md); }
.form__group { margin-bottom: 1.2rem; }
.form__group label { display: block; margin-bottom: 0.4rem; font-weight: 500; color: var(--color-text); font-size: 0.95rem; }
.form__group input, .form__group select, .form__group textarea { width: 100%; padding: 0.9rem; border: 1px solid var(--color-border); border-radius: var(--radius); font-family: inherit; font-size: 1rem; transition: var(--transition); background: #fafafa; }
.form__group input:focus, .form__group select:focus, .form__group textarea:focus { outline: none; border-color: var(--color-primary); background: white; box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1); }
.form__group textarea { resize: vertical; min-height: 100px; }

/* Footer */
.footer { background: #111; color: #aaa; padding: var(--spacing-md) 0; }
.footer__container { display: flex; flex-direction: column; gap: var(--spacing-md); align-items: center; text-align: center; }
.footer__brand h3 { color: white; margin-bottom: 0.3rem; }
.footer__links { display: flex; gap: 1.5rem; flex-wrap: wrap; justify-content: center; }
.footer__links a:hover { color: white; text-decoration: underline; }

/* Responsive Breakpoints */
@media (min-width: 768px) {
    .fleet__grid { grid-template-columns: repeat(2, 1fr); }
    .differentials__grid { grid-template-columns: repeat(2, 1fr); }
    .quote__container { grid-template-columns: 1fr 1fr; }
    .footer__container { flex-direction: row; justify-content: space-between; text-align: left; }
    .footer__links { justify-content: flex-end; }
}

@media (min-width: 1024px) {
    .fleet__grid { grid-template-columns: repeat(3, 1fr); }
    .differentials__grid { grid-template-columns: repeat(4, 1fr); }
    .hero { padding: 5rem 0; }
}

@media (max-width: 767px) {
    .nav__toggle { display: block; }
    .nav__list { 
        position: fixed; top: 65px; left: 0; right: 0; 
        background: white; flex-direction: column; 
        padding: 1rem; gap: 0.5rem; 
        box-shadow: var(--shadow-md); 
        transform: translateY(-150%); opacity: 0; pointer-events: none;
        transition: transform 0.3s ease, opacity 0.3s ease; z-index: 99; 
    }
    .nav__list--active { transform: translateY(0); opacity: 1; pointer-events: all; }
    .nav__link { width: 100%; padding: 0.8rem; justify-content: flex-start; }
    .section { padding: var(--spacing-md) 0; }
    .fleet__image { height: 180px; }
    .quote__info h2 { text-align: center; }
}