@font-face {
    font-family: 'Stack Sans Notch';
    src: url('/fonts/StackSansNotch.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

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

:root {
    --bg: #222222;
    --bg-elevated: #2a2a2a;
    --bg-card: #2e2e2e;
    --bg-card-hover: #353535;
    --border: #3a3a3a;
    --border-light: #444444;
    --text: #f0f0f0;
    --text-secondary: #aaaaaa;
    --text-muted: #888888;
    --accent: #66CBFF;
    --accent-hover: #99DDFF;
    --accent-subtle: rgba(102, 203, 255, 0.1);
    --radius: 12px;
    --transition: 0.2s ease;
    --max-width: 1080px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    color: var(--accent-hover);
}

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

/* ── Maintenance banner ── */

.maintenance-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    height: 28px;
    overflow: hidden;
    opacity: 0.5;
    pointer-events: none;
    background: repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 8px,
            rgba(0, 0, 0, 0.15) 8px,
            rgba(0, 0, 0, 0.15) 16px
    ),
    #f5c518;
    display: flex;
    align-items: center;
    justify-content: center;
}

.maintenance-banner span {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: #111111;
}

/* ── Navigation ── */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

nav.scrolled {
    background: rgba(34, 34, 34, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--border);
}

nav .nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

nav .nav-logo {
    font-family: 'Stack Sans Notch', 'Inter', sans-serif;
    font-size: 1.15rem;
    color: var(--text);
    letter-spacing: 0.01em;
}

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

nav .nav-links a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: color var(--transition);
}

nav .nav-links a:hover {
    color: var(--text);
}

nav .nav-links a.active {
    color: var(--accent);
}

nav .nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    width: 38px;
    height: 38px;
    position: relative;
}

nav .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    position: absolute;
    left: 9px;
    transition: all 0.25s ease;
}

nav .nav-toggle span:nth-child(1) {
    top: 11px;
}

nav .nav-toggle span:nth-child(2) {
    top: 18px;
}

nav .nav-toggle span:nth-child(3) {
    top: 25px;
}

nav.menu-open .nav-toggle span:nth-child(1) {
    top: 18px;
    transform: rotate(45deg);
}

nav.menu-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

nav.menu-open .nav-toggle span:nth-child(3) {
    top: 18px;
    transform: rotate(-45deg);
}

/* ── Hero (home only) ── */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 24px 80px;
}

.hero-content {
    text-align: center;
}

.hero-visual {
    position: relative;
    display: inline-block;
    margin-bottom: 0;
}

.hero-visual::before {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(49, 153, 255, 0.15) 0%, transparent 70%);
    filter: blur(20px);
    z-index: 0;
}

.hero-photo {
    position: relative;
    z-index: 1;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border);
    mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
}

.hero h1 {
    font-family: 'Stack Sans Notch', 'Inter', sans-serif;
    font-size: clamp(3rem, 7vw, 4.5rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-top: -50px;
    position: relative;
    z-index: 2;
    margin-bottom: 12px;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.hero-socials {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.hero-socials a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.hero-socials a:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.hero-socials svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* ── Page header (subpages) ── */

.page-header {
    padding: 100px 24px 40px;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-header .section-label {
    margin-bottom: 8px;
}

/* ── Sections ── */

.section {
    padding: 40px 24px 80px;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 10px;
}

.section-title {
    font-family: 'Stack Sans Notch', 'Inter', sans-serif;
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    margin-top: 12px;
}

/* ── Timeline ── */

.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: var(--border);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: 28px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -32px;
    top: 7px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg);
}

.timeline-item.minor::before {
    background: var(--border-light);
    width: 8px;
    height: 8px;
    left: -31px;
    top: 8px;
}

.timeline-date {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.04em;
    margin-bottom: 2px;
}

.timeline-item.minor .timeline-date {
    color: var(--text-muted);
}

.timeline-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.timeline-text a {
    color: var(--text);
    text-decoration: underline;
    text-decoration-color: var(--border);
    text-underline-offset: 2px;
    transition: text-decoration-color var(--transition), color var(--transition);
}

.timeline-text a:hover {
    text-decoration-color: var(--accent);
    color: var(--accent);
}

/* ── Cards (shared) ── */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.card {
    position: relative;
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    color: var(--text);
    transition: border-color var(--transition), background var(--transition);
}

.card:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    color: var(--text);
}

.card-arrow {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    transition: color var(--transition);
}

.card:hover .card-arrow {
    color: var(--accent);
}

.card-icon {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: var(--accent-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    color: var(--accent);
}

.card-icon svg {
    width: 18px;
    height: 18px;
}

.card-icon img {
    width: 20px;
    height: 20px;
}

.card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ── Projects ── */

.card.faded {
    opacity: 0.6;
}

.card.faded:hover {
    opacity: 1;
}

.card-icon-project {
    background: none;
    overflow: hidden;
    border-radius: 0;
}

.card-icon-project img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.projects-section-divider {
    margin-top: 48px;
    margin-bottom: 16px;
}

.projects-section-divider h2 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

/* ── Donate ── */

.donate-intro {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

.card.recommended {
    border-color: var(--accent);
    background: rgba(102, 203, 255, 0.04);
}

.donate-recommended-badge {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--accent-subtle);
    color: var(--accent);
    vertical-align: middle;
    margin-left: 6px;
}

.donate-thanks {
    margin-top: 32px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Contact Form ── */

.contact-form-wrapper {
    max-width: 100%;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-row-three {
    grid-template-columns: 1fr 1fr 1fr;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.field-badge {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 2px 6px;
    border-radius: 4px;
    vertical-align: middle;
}

.field-badge.required {
    background: var(--accent-subtle);
    color: var(--accent);
}

.field-badge.optional {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 14px;
    transition: border-color var(--transition), background var(--transition);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.form-group select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-altcha {
    padding: 4px 0;
    display: flex;
    justify-content: center;
}

altcha-widget {
    --altcha-color-text: var(--text-secondary);
    --altcha-color-text-inverted: var(--bg);
    --altcha-color-border: var(--border);
    --altcha-color-border-focus: var(--accent);
    --altcha-color-base: var(--bg-card);
    --altcha-color-footer-bg: transparent;
    --altcha-border-radius: 8px;
    --altcha-max-width: 340px;
    display: block;
}

.form-privacy {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.form-status {
    font-size: 0.85rem;
    padding: 12px 16px;
    border-radius: 8px;
    line-height: 1.5;
}

.form-status.success {
    background: rgba(76, 175, 80, 0.12);
    color: #81c784;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.form-status.error {
    background: rgba(244, 67, 54, 0.12);
    color: #e57373;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

.form-submit {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--bg);
    background: var(--accent);
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    cursor: pointer;
    transition: background var(--transition), opacity var(--transition);
    align-self: flex-end;
}

.form-submit:hover {
    background: var(--accent-hover);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-submit-icon {
    width: 16px;
    height: 16px;
}

.form-submit.loading .form-submit-text::after {
    content: '...';
}

/* ── Book (HTML per tutti) ── */

.book-hero {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 48px;
    align-items: start;
}

.book-cover {
    width: 280px;
    flex-shrink: 0;
    cursor: zoom-in;
}

.book-cover img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition);
}

.book-cover:hover img {
    transform: scale(1.02);
}

.book-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.book-overlay.active {
    opacity: 1;
    visibility: visible;
}

.book-overlay img {
    max-width: min(90vw, 640px);
    max-height: 90vh;
    border-radius: var(--radius);
    box-shadow: 0 16px 64px rgba(0, 0, 0, 0.6);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.book-overlay.active img {
    transform: scale(1);
}

.book-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.book-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 28px;
}

.book-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.book-meta-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}

.book-meta-value {
    font-size: 0.9rem;
    color: var(--text);
}

.book-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.book-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 12px 24px;
    border-radius: 8px;
    transition: background var(--transition), border-color var(--transition);
}

.book-btn svg {
    width: 16px;
    height: 16px;
}

.book-btn-primary {
    color: var(--bg);
    background: var(--accent);
}

.book-btn-primary:hover {
    background: var(--accent-hover);
    color: var(--bg);
}

.book-btn-secondary {
    color: var(--text);
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.book-btn-secondary:hover {
    border-color: var(--accent);
    color: var(--text);
}

.book-note {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.book-errata {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.book-errata-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.book-errata-content {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.book-errata-report {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Addon project pages ── */

.addon-hero {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 36px;
    align-items: start;
}

.addon-icon {
    width: 96px;
    flex-shrink: 0;
}

.addon-icon img {
    width: 100%;
    border-radius: var(--radius);
}

.addon-name {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.addon-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.addon-divider {
    border-top: 1px solid var(--border);
    margin: 8px 0;
}

.addon-timeline {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.addon-timeline-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.timeline-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.timeline-list .timeline-item {
    display: grid;
    grid-template-columns: 56px 140px 1fr;
    gap: 12px;
    align-items: baseline;
    font-size: 0.9rem;
    margin-bottom: 0;
}

.timeline-list .timeline-item::before {
    display: none;
}

.timeline-version {
    font-weight: 600;
    color: var(--text);
    font-size: 0.85rem;
}

.timeline-list .timeline-item.major .timeline-version {
    color: var(--accent);
}

.timeline-list .timeline-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.timeline-list .timeline-item p {
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ── Footer ── */

footer {
    padding: 40px 24px;
    border-top: 1px solid var(--border);
    width: 100%;
    max-width: var(--max-width);
    margin: auto auto 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-links {
    display: flex;
    gap: 20px;
    list-style: none;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Responsive ── */

@media (max-width: 768px) {
    nav .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 14px 24px;
        gap: 10px;
        border-bottom: 1px solid var(--border);
    }

    nav.menu-open {
        bottom: 0;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: var(--bg);
    }

    nav.menu-open .nav-inner {
        border-bottom: 1px solid var(--border);
    }

    nav.menu-open .nav-links {
        display: flex;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        border-bottom: none;
        align-items: center;
        justify-content: flex-start;
        gap: 0;
        padding: 32px 0;
        overflow-y: auto;
    }

    nav.menu-open .nav-links li {
        width: 100%;
        text-align: center;
    }

    nav.menu-open .nav-links a {
        font-size: 1.2rem;
        font-weight: 500;
        color: var(--text-secondary);
        display: block;
        padding: 14px 24px;
    }

    nav.menu-open .nav-links a.active {
        color: var(--accent);
    }

    nav.menu-open .nav-links a:hover {
        background: var(--bg-card);
        color: var(--text);
    }

    body.menu-open {
        overflow: hidden;
    }

    nav .nav-toggle {
        display: block;
    }

    .hero {
        padding: 80px 24px 60px;
    }

    .hero-photo {
        width: 180px;
        height: 180px;
        mask-image: none;
        -webkit-mask-image: none;
    }

    .hero-visual::before {
        inset: -10px;
    }

    .hero h1 {
        margin-top: 20px;
    }

    .section {
        padding: 32px 24px 60px;
    }

    .page-header {
        padding: 80px 24px 24px;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .form-row,
    .form-row-three {
        grid-template-columns: 1fr;
    }

    .book-hero {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .book-cover {
        width: 100%;
    }

    .addon-hero {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .addon-icon {
        width: 72px;
    }

    .timeline-list .timeline-item {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}

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