@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #25d366;
    --bg: #f1f5f9;
    --text: #0f172a;
    --muted: #64748b;
    --card-bg: rgba(255,255,255,0.9);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(180deg, #eef2ff, var(--bg));
    color: var(--text);
}

.container {
    max-width: 1250px;
    margin: auto;
    padding: 0 20px;
}

/* HEADER */
header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 90px 0;
    text-align: center;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
}

header p {
    font-size: 1.15rem;
    opacity: 0.9;
}

.hero-cta {
    margin-top: 30px;
}

/* FILTERS */
.filters {
    background: white;
    padding: 30px 0;
    position: sticky;
    top: 0;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.filter-btn {
    padding: 10px 22px;
    border-radius: 30px;
    border: 1px solid var(--primary);
    background: transparent;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary);
    color: white;
}

/* GRID */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    padding: 60px 0;
}

/* CARD */
.software-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 18px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    transition: 0.35s;
}

.software-card:hover {
    transform: translateY(-8px);
}

.software-card h3 {
    color: var(--primary-dark);
    margin-bottom: 8px;
}

/* WHATSAPP */
.whatsapp-btn {
    background: var(--secondary);
    color: white;
    padding: 14px 30px;
    border-radius: 40px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.whatsapp-float {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background: #25d366;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 30px;
    box-shadow: 0 12px 30px rgba(37,211,102,0.5);
    z-index: 999;
}

/* FOOTER */
footer {
    background: #020617;
    color: #94a3b8;
    padding: 50px 0;
    text-align: center;
}

/* MOBILE */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
}