/* ============================
   VARIÁVEIS E BASE
   ============================ */

:root {
    --bg: #f5f5f3;
    --surface: #ffffff;
    --text: #0a0a0a;
    --text-soft: #5f5f5f;
    --line: #dddddd;
    --black: #000000;
    --white: #ffffff;
    --whatsapp: #25d366;

    --header-height: 88px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;

    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 35px rgba(0, 0, 0, 0.08);

    --container: 1200px;

    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    --text-sm: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.08rem);
    --text-lg: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
    --text-xl: clamp(1.6rem, 1.3rem + 1.6vw, 2.4rem);
    --text-2xl: clamp(2.2rem, 1.5rem + 3vw, 4rem);
    --text-hero: clamp(2.8rem, 1.4rem + 5vw, 5.5rem);
}

/* ============================
   RESET
   ============================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Space Grotesk", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a,
button,
input,
textarea {
    font: inherit;
}

section {
    padding: clamp(4rem, 8vw, 8rem) 0;
}

main section,
header {
    padding-inline: 6vw;
}

h1,
h2,
h3 {
    line-height: 1.05;
    letter-spacing: -0.03em;
}

p {
    color: var(--text-soft);
}

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

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;

    display: flex;
    align-items: center;
    justify-content: space-between;

    background: rgba(0, 0, 0, 0.96);
    color: var(--white);
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.7rem;
    font-weight: 700;
    letter-spacing: -0.04em;
}

nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--white);
}

/* ÍCONES CENTRALIZADOS */
.social-header {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 22px;
}

.social-header img {
    width: 24px;
    height: 24px;
    /*filter: invert(1); /* deixa branco se o ícone for preto */
    transition: 0.3s ease;
}

.social-header img:hover {
    transform: scale(1.15);
    opacity: 0.8;
}

/* ============================
   BOTÕES
   ============================ */

.cta-primary,
.cta-secondary,
button,
.whats-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0.95rem 1.6rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    transition: 0.22s ease;
    cursor: pointer;
}

.cta-primary {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.cta-primary:hover {
    background: var(--white);
    color: var(--black);
}

.cta-secondary {
    border: 1px solid var(--white);
    color: var(--white);
    background: transparent;
}

.cta-secondary:hover {
    background: var(--white);
    color: var(--black);
}

/* ============================
   HERO
   ============================ */

.hero {
    min-height: 100vh;
    padding-top: calc(var(--header-height) + 3rem);
    padding-bottom: 4rem;
    display: flex;
    align-items: center;

    background-image:
        linear-gradient(to right, rgba(0, 0, 0, 0.58), rgba(0, 0, 0, 0.12)),
        url("assets/fundo.jpeg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero h1 {
    max-width: 10ch;
    color: var(--white);
    font-size: var(--text-hero);
    font-weight: 700;
}

.marca-destaque {
    color: #d9d9d9;
}

/* ============================
   PILARES
   ============================ */

.pilares {
    text-align: center;
    padding: 6rem 2rem;
}

.pilares h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.pilares-grid {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    align-items: center;
}

.pilar-item {
    width: 280px;
    padding: 1rem 2rem;
    background: #000;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    border-radius: 6px;
    text-align: center;
    transition: 0.2s ease;
}

.pilar-item:hover {
    background: #222;
}

.cards {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
}

.card {
    flex: 1 1 280px;
    text-align: left;
}

.card img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.card h3 {
    margin-top: var(--space-4);
    font-size: var(--text-lg);
}

/* ============================
   FRASE
   ============================ */

.frase {
    background: var(--black);
    color: var(--white);
    text-align: center;
}

.frase h2 {
    font-size: clamp(2rem, 1.4rem + 2vw, 3.5rem);
    letter-spacing: -0.04em;
}

/* ============================
   CONTATO
   ============================ */

.contato {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding-inline: 1.5rem;
}

.contato h2 {
    font-size: clamp(2rem, 1.4rem + 2.6vw, 3.5rem);
    max-width: 14ch;
    margin: 0 auto 1rem;
}

.contato p {
    max-width: 650px;
    margin: 0 auto 2.5rem;
    font-size: var(--text-base);
}

form {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    background: var(--surface);
    padding: clamp(1.4rem, 2vw, 2rem);
    border: 1px solid rgba(10, 10, 10, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

input,
textarea {
    width: 100%;
    padding: 1rem 1.1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
    background: var(--white);
    color: var(--text);
    outline: none;
}

input:focus,
textarea:focus {
    border-color: var(--black);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

button {
    width: 100%;
    background: var(--black);
    color: var(--white);
    border: none;
}

button:hover {
    opacity: 0.92;
}

.whats-btn {
    margin-top: 1.2rem;
    background: var(--whatsapp);
    color: var(--white);
}

.whats-btn:hover {
    background: #1fb85a;
}

/* ============================
   RESPONSIVO
   ============================ */

@media (max-width: 900px) {
    header {
        padding-inline: 1rem;
    }

    main section {
        padding-inline: 1rem;
    }

    .hero {
        padding-top: calc(var(--header-height) + 2rem);
        min-height: 90vh;
    }

    .cards {
        gap: 1.5rem;
    }
}

@media (max-width: 640px) {
    :root {
        --header-height: 76px;
    }

    .logo {
        font-size: 1.35rem;
    }

    .cta-primary {
        padding: 0.85rem 1rem;
        font-size: 0.85rem;
    }

    .hero {
        align-items: flex-end;
        padding-bottom: 3rem;
    }

    .hero h1 {
        font-size: clamp(2.3rem, 9vw, 3.4rem);
        max-width: 100%;
    }

    form {
        padding: 1.25rem;
    }
}

/* ============================
   BOTÃO ESPECIAL
   ============================ */

.btn-motorsport {
    display: inline-block;
    margin-top: 2rem;
    padding: 1rem 2rem;
    background: #000;
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
    transition: 0.2s ease;
}

.btn-motorsport:hover {
    background: #222;
}