:root {
    --leggolo-blue: #1F4FFF;
    --leggolo-green: #16a34a;
    --text-main: #111827;
    --text-muted: #4b5563;
    --bg-page: #f5f7fb;
    --bg-card: #ffffff;
    --border-soft: #e5e7eb;
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.08);
}

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

body {
    margin: 0;
    font-family: "Lexend", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-page);
    color: var(--text-main);
}

/* NAVBAR */
.navbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 5vw;
    background: #ffffff;
    border-bottom: 1px solid rgba(15, 23, 42, 0.03);
    box-shadow: 0 4px 18px rgba(15, 23, 42, 0.04);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    height: 40px;
    width: 40px;
    border-radius: 12px;
    object-fit: cover;
}

.brand-text {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
    line-height: 1.1;
}

.brand-light {
    color: #9ca3af;
    font-weight: 500;
}

.brand-strong {
    color: #111827;
    font-weight: 700;
    font-size: 1.1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.8rem;
    font-size: 0.95rem;
}

.nav-right a {
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
}

.nav-right a:hover {
    color: var(--leggolo-blue);
}

/* HERO */

.hero {
    display: grid;
    grid-template-columns: minmax(0, 2.1fr) minmax(0, 1.6fr);
    gap: 3rem;
    padding: 72px 8vw 60px;
}

.hero-left {
    max-width: 720px;
}

.hero-title {
    font-size: clamp(2.5rem, 4vw, 3.2rem);
    font-weight: 800;
    margin: 0 0 14px;
}

.accent-green {
    color: var(--leggolo-green);
}

.accent-blue {
    color: var(--leggolo-blue);
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin: 0 0 24px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 22px 26px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-soft);
    align-self: flex-start;
}

.hero-card-title {
    margin: 0 0 10px;
    font-size: 1.2rem;
}

.hero-card-steps {
    margin: 0 0 14px 1.1rem;
    padding: 0;
    color: #374151;
    font-size: 0.95rem;
}

.hero-card-footnote {
    margin: 0;
    font-size: 0.9rem;
    color: #4b5563;
}

/* SEZIONI GENERICHE */

.section {
    padding: 40px 8vw 32px;
}

.section-inner {
    max-width: 1120px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(2rem, 3vw, 2.4rem);
    margin: 0 0 18px;
}

.section-paragraph {
    margin: 0 0 14px;
    font-size: 1rem;
    color: var(--text-muted);
}

.section-list {
    margin: 0 0 16px 1.3rem;
    padding: 0;
    color: var(--text-muted);
}

/* LABORATORIO */

.section-lab {
    padding-top: 32px;
    padding-bottom: 40px;
}

.lab-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.2fr);
    gap: 2.2rem;
    margin-top: 1rem;
}

.lab-label {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
}

.lab-label-small {
    font-size: 0.8rem;
    font-weight: 500;
    color: #6b7280;
    margin-bottom: 4px;
    display: block;
}

.lab-textarea {
    width: 100%;
    min-height: 150px;
    resize: vertical;
    border-radius: 14px;
    border: 1px solid var(--border-soft);
    padding: 10px 12px;
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    background: #ffffff;
}

.lab-textarea:focus {
    border-color: var(--leggolo-blue);
    box-shadow: 0 0 0 1px rgba(31, 79, 255, 0.25);
}

.lab-file-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 12px;
    gap: 16px;
}

.lab-file-input {
    font-size: 0.85rem;
}

.lab-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.lab-status {
    margin-top: 10px;
    font-size: 0.85rem;
    color: #6b7280;
}

.lab-output {
    background: var(--bg-card);
    border-radius: 18px;
    padding: 18px 18px 16px;
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-soft);
}

.lab-output-title {
    margin: 0 0 10px;
    font-size: 1rem;
}

.lab-output-box {
    border-radius: 12px;
    border: 1px dashed rgba(148, 163, 184, 0.9);
    padding: 12px 12px;
    min-height: 160px;
    background: #f9fafb;
    font-size: 0.95rem;
    white-space: pre-wrap;
}

/* DONA ORA */

.section-donate {
    padding-top: 20px;
    padding-bottom: 48px;
}

.donate-card {
    background: linear-gradient(135deg, #111827, #1F2937);
    color: #e5e7eb;
    border-radius: 22px;
    padding: 28px 24px 26px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.65);
    text-align: left;
}

.donate-card .section-title {
    color: #f9fafb;
}

/* FOOTER */

.footer {
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    padding: 16px 8vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #6b7280;
    background: #ffffff;
}

.footer a {
    color: var(--leggolo-blue);
    text-decoration: none;
}

/* BOTTONI */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--leggolo-blue);
    color: #ffffff;
    border-color: var(--leggolo-blue);
}

.btn-primary:hover {
    background: #1741d6;
    border-color: #1741d6;
}

.btn-outline {
    background: #ffffff;
    color: #111827;
    border-color: var(--border-soft);
}

.btn-outline:hover {
    border-color: var(--leggolo-blue);
    color: var(--leggolo-blue);
}

.btn-ghost {
    background: transparent;
    color: #6b7280;
    border-color: transparent;
}

.btn-ghost:hover {
    background: #f3f4f6;
}

/* RESPONSIVE */

@media (max-width: 960px) {
    .hero {
        grid-template-columns: 1fr;
        padding-top: 54px;
    }

    .hero-card {
        order: -1;
    }

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

    .nav-right {
        display: none; /* per semplicità mobile */
    }
}

@media (max-width: 640px) {
    .navbar {
        padding-inline: 16px;
    }

    .section {
        padding-inline: 16px;
    }

    .hero {
        padding-inline: 16px;
    }
}