/* ============================
   FONT & BASE STYLE
============================ */
body {
    font-family: "Lexend", sans-serif;
    background: #f4f7fb;
    margin: 0;
    color: #111827;
}

/* ============================
   NAVBAR
============================ */
.navbar {
    background: white;
    padding: 14px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 45px;
    margin-right: 10px;
}

.logo-area {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.3rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #374151;
    text-decoration: none;
    font-size: 0.98rem;
}

.nav-links a.active {
    font-weight: 700;
    color: #1F4FFF;
}

/* ============================
   LAYOUT GENERALE
============================ */
.container {
    max-width: 1150px;
    margin: auto;
    padding: 25px;
}

.section {
    padding: 60px 0;
}

.section-title {
    font-size: 2.3rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.sub-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 35px;
    margin-bottom: 10px;
}

.paragraph {
    font-size: 1.05rem;
    color: #4b5563;
    line-height: 1.65;
    margin-bottom: 18px;
}

.narrow {
    max-width: 780px;
}

/* ============================
   HERO / HOME PAGE
============================ */
.hero-section {
    background: #eef3ff;
    padding-top: 120px;
    padding-bottom: 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.4fr);
    gap: 40px;
    align-items: center;
}

.title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.blue { color: #1F4FFF; }

.subtitle {
    font-size: 1.15rem;
    max-width: 640px;
    color: #4b5563;
    margin-bottom: 25px;
}

.btn-row {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.btn-primary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-family: inherit;
}

.btn-primary {
    background: #1F4FFF;
    color: white;
    padding: 12px 22px;
    border-radius: 999px;
    border: none;
    text-decoration: none;
    font-weight: 600;
}

.btn-outline {
    background: white;
    border: 2px solid #1F4FFF;
    color: #1F4FFF;
    padding: 12px 22px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
}

.btn-primary.small,
.btn-outline.small {
    padding: 10px 18px;
    border-radius: 999px;
    font-size: 0.9rem;
}

/* ============================
   CARD
============================ */
.card {
    background: white;
    padding: 25px;
    border-radius: 24px;
    max-width: 450px;
    box-shadow: 0 10px 30px rgba(15,23,42,0.08);
}

.card .small {
    font-size: 0.9rem;
    color: #6b7280;
}

/* ============================
   FEATURES
============================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature-card {
    background: white;
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 8px 24px rgba(15,23,42,0.04);
}

.bullet-list {
    list-style: disc;
    padding-left: 20px;
    color: #4b5563;
}

.pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 15px 0 25px;
}

.pill {
    background: #e5edff;
    color: #1F3FFF;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.9rem;
}

.cta-bottom {
    margin-top: 25px;
}

/* ============================
   TEXTAREA & OUTPUT
============================ */
.textarea {
    width: 100%;
    min-height: 180px;
    padding: 15px;
    border-radius: 18px;
    border: 1px solid #d1d5db;
    font-family: inherit;
    font-size: 0.98rem;
    resize: vertical;
    background: white;
}

.status {
    margin-top: 12px;
    font-size: 0.9rem;
    color: #6b7280;
}

.output-box {
    background: #fff;
    padding: 18px;
    border-radius: 18px;
    min-height: 120px;
    margin-top: 15px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    font-size: 0.98rem;
}

/* ============================
   LABORATORIO AI LAYOUT
============================ */
.lab-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;          /* <-- SPAZIO MAGGIORE TRA I PANNELLI */
    margin-top: 30px;
}

.lab-map-title {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

/* ============================
   MAPPA CONCETTUALE CONTAINER
============================ */
.map-container {
    background: #ffffff;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(15,23,42,0.06);
    padding: 20px;
    min-height: 360px;
    overflow: auto;
}

.map-placeholder {
    color: #9ca3af;
    font-size: 0.95rem;
}

/* ============================
   RESPONSIVE
============================ */
@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .lab-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* ------------------------------
   MAPPA CONCETTUALE VISIVA LEGGOLO
-------------------------------- */

.tree-container {
    padding: 20px;
    min-height: 350px;
    background: #ffffff;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(15,23,42,0.06);
}

.tree-node {
    background: white;
    border-radius: 16px;
    padding: 12px 18px;
    border: 2px solid #e5e7eb;
    display: inline-block;
    margin: 20px auto;
    font-size: 1.05rem;
    text-align: center;
    cursor: pointer;
    transition: 0.2s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.06);
}

.tree-node:hover {
    border-color: #1F4FFF;
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

.tree-children {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 15px;
}

.tree-line {
    width: 2px;
    height: 25px;
    background: #c7c7c7;
    margin: 0 auto;
}