/* ============================================
   Fórum de Marketing Digital - CSS
   Paleta: Roxo, azul, branco
   Fontes: Space Grotesk + Manrope
   ============================================ */

:root {
    --color-primary: #7c3aed;
    --color-secondary: #3b82f6;
    --color-accent: #a78bfa;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f3ff;
    --color-text: #374151;
    --color-text-light: #6b7280;
    --color-text-white: #faf5ff;
    --color-border: #e5e7eb;
    --color-dark: #0f172a;
    --font-heading: 'Manrope', 'Segoe UI', sans-serif;
    --font-body: 'Space Grotesk', 'Segoe UI', sans-serif;
    --max-width: 1150px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 16px rgba(124, 58, 237, 0.1);
    --shadow-lg: 0 10px 40px rgba(124, 58, 237, 0.15);
    --radius: 12px;
    --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-secondary); }
img { max-width: 100%; height: auto; }

/* ---- HEADER ---- */
.site-header {
    background: var(--color-dark);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-text-white);
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--color-accent);
}

.nav-list { list-style: none; display: flex; gap: 28px; }
.nav-list a {
    color: #c4b5fd;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition);
}
.nav-list a:hover { color: var(--color-text-white); }

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}
.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-white);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---- HERO ---- */
.hero {
    background: linear-gradient(135deg, #4c1d95 0%, var(--color-primary) 40%, var(--color-secondary) 100%);
    color: var(--color-text-white);
    padding: 90px 0 70px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(167, 139, 250, 0.2) 0%, transparent 60%);
}

.hero-tag {
    display: inline-block;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--color-accent);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    position: relative;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    position: relative;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.08rem;
    color: #ddd6fe;
    max-width: 680px;
    margin: 0 auto;
    line-height: 1.8;
    position: relative;
}

/* ---- SECTIONS ---- */
.content-section { padding: 60px 0; }
.content-section.alt-bg { background: var(--color-bg-alt); }

.content-section h2 {
    font-family: var(--font-heading);
    font-size: 1.9rem;
    color: var(--color-dark);
    margin-bottom: 28px;
    position: relative;
    padding-bottom: 12px;
    font-weight: 700;
}

.content-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
}

.content-section h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-dark);
    margin-top: 35px;
    margin-bottom: 14px;
    font-weight: 600;
}

.content-section p { margin-bottom: 18px; font-size: 1rem; }

/* ---- CARDS ---- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 10px;
}

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 30px 24px;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.card-icon { font-size: 2.8rem; margin-bottom: 16px; }
.card h3 {
    font-family: var(--font-heading);
    color: var(--color-dark);
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 1.05rem;
    font-weight: 700;
}
.card p { color: var(--color-text-light); font-size: 0.93rem; margin-bottom: 0; }

/* ---- TOPICS ---- */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.topic-item {
    padding: 24px;
    background: var(--color-bg);
    border-radius: var(--radius);
    border-left: 4px solid var(--color-secondary);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.topic-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.topic-item h3 {
    font-family: var(--font-heading);
    color: var(--color-dark);
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.05rem;
    font-weight: 600;
}

.topic-item p { color: var(--color-text-light); font-size: 0.93rem; margin-bottom: 0; }

/* ---- CTA ---- */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, #4c1d95 100%);
    color: var(--color-text-white);
    text-align: center;
    padding: 60px 0;
}

.cta-section h2 {
    color: var(--color-text-white);
    font-family: var(--font-heading);
}

.cta-section h2::after { background: var(--color-accent); }

.cta-section p {
    color: #ddd6fe;
    max-width: 600px;
    margin: 0 auto 30px;
}

.cta-button {
    display: inline-block;
    background: var(--color-text-white);
    color: var(--color-primary);
    padding: 14px 36px;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    transition: background var(--transition), transform var(--transition);
}

.cta-button:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
}

/* ---- FOOTER ---- */
.site-footer {
    background: var(--color-dark);
    color: var(--color-text-white);
    padding: 40px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-brand {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: 10px;
}

.footer-col p { color: #a5b4fc; font-size: 0.9rem; }
.footer-heading {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: #a5b4fc; font-size: 0.9rem; }
.footer-col ul a:hover { color: var(--color-accent); }

.footer-bottom {
    border-top: 1px solid #1e1b4b;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p { color: #6366f1; font-size: 0.85rem; }

/* ---- WHATSAPP ---- */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: transform var(--transition);
}

.whatsapp-float:hover { transform: scale(1.08); }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-dark);
        padding: 80px 30px 30px;
        transition: right var(--transition);
        box-shadow: var(--shadow-lg);
    }
    .main-nav.open { right: 0; }
    .nav-list { flex-direction: column; gap: 18px; }
    .nav-list a { font-size: 1rem; }

    .hero { padding: 55px 0 45px; }
    .hero h1 { font-size: 1.7rem; }
    .hero-subtitle { font-size: 1rem; }
    .content-section h2 { font-size: 1.4rem; }
    .content-section h3 { font-size: 1.1rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.4rem; }
    .cards-grid { grid-template-columns: 1fr; }
    .topics-grid { grid-template-columns: 1fr; }
}