/* ============================================
   Biologia Digital - Styles
   Ciencia e Inovacao
   Paleta: Verde biologia, azul cientifico, branco
   ============================================ */

:root {
    --primary: #059669;
    --primary-light: #10b981;
    --primary-dark: #047857;
    --secondary: #0284c7;
    --secondary-light: #0ea5e9;
    --secondary-dark: #0369a1;
    --white: #ffffff;
    --bg-light: #f0fdfa;
    --bg-mesh: linear-gradient(135deg, #ecfdf5 0%, #f0f9ff 40%, #ecfdf5 100%);
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --shadow-sm: 0 2px 8px rgba(5, 150, 105, 0.08);
    --shadow-md: 0 6px 24px rgba(5, 150, 105, 0.12);
    --shadow-lg: 0 12px 40px rgba(5, 150, 105, 0.16);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --font-heading: 'Source Serif 4', Georgia, serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--white);
    color: var(--gray-700);
    line-height: 1.75;
    overflow-x: hidden;
}

a {
    color: var(--secondary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-dark);
}

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

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Header --- */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(5, 150, 105, 0.1);
    transition: var(--transition);
}

#main-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
}

.logo-dna {
    font-size: 1.4rem;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-dark);
    letter-spacing: -0.3px;
}

.logo:hover {
    color: var(--primary-dark);
}

.nav-list {
    list-style: none;
    display: flex;
    gap: 28px;
}

.nav-list a {
    color: var(--gray-600);
    font-size: 0.92rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    transition: var(--transition);
}

.nav-list a:hover {
    color: var(--primary-dark);
}

.nav-list a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--gray-800);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--bg-mesh);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-mesh {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 10% 30%, rgba(5, 150, 105, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(2, 132, 199, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 10%, rgba(5, 150, 105, 0.04) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 840px;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4.5vw, 3rem);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.12rem;
    color: var(--gray-500);
    line-height: 1.85;
    max-width: 720px;
}

/* --- Sections --- */
.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--bg-light);
}

.section h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    color: var(--gray-900);
    margin-bottom: 40px;
}

.section-intro {
    font-size: 1.1rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto 32px;
}

/* --- Content --- */
.content-block {
    max-width: 800px;
}

.content-block p {
    margin-bottom: 20px;
    color: var(--gray-700);
    line-height: 1.85;
}

.content-block h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-top: 36px;
    margin-bottom: 12px;
    padding-left: 16px;
    border-left: 3px solid var(--primary-light);
}

/* --- Areas Grid --- */
.areas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.area-card {
    padding: 32px 28px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.area-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 4px 0 0 4px;
}

.area-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.area-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.25;
    margin-bottom: 10px;
}

.area-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.area-card p {
    color: var(--gray-500);
    font-size: 0.93rem;
    line-height: 1.7;
}

/* --- Stats Grid --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.stat-item {
    padding: 36px 20px;
    text-align: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.85);
    font-weight: 500;
}

/* --- CTA --- */
.cta-wrapper {
    max-width: 600px;
    text-align: center;
    margin: 0 auto;
}

.cta-wrapper p {
    color: var(--gray-600);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* --- Footer --- */
#main-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 56px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 36px;
    margin-bottom: 36px;
}

.footer-col .logo-dna {
    font-size: 1.2rem;
}

.footer-col .logo-text {
    color: var(--white);
    font-size: 1.3rem;
}

.footer-col > p {
    margin-top: 12px;
    color: var(--gray-400);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-col h4 {
    color: var(--white);
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: 14px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul a {
    color: var(--gray-400);
    font-size: 0.9rem;
}

.footer-col ul a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* --- WhatsApp --- */
.whatsapp-btn {
    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 14px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: var(--transition);
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
    color: var(--white);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    #main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(14px);
        transform: translateY(-120%);
        transition: transform 0.35s ease;
        border-bottom: 1px solid rgba(5, 150, 105, 0.1);
    }

    #main-nav.active {
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }

    .nav-list li {
        border-bottom: 1px solid rgba(5, 150, 105, 0.06);
    }

    .nav-list a {
        display: block;
        padding: 14px 0;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .section {
        padding: 56px 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .areas-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }
}

/* --- Animations --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(25px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-content {
    animation: fadeInUp 0.7s ease forwards;
}