:root {
    --ink-black: #1a1a1a;
    --page-bg: #f4f1ea;
    --panel-bg: #fffef9;
    --muted: #71716a;
    --line: #cbc8bf;
    --accent-yellow: #e6c200;
    --flame: #ea6a24;
    --heart: #d93d61;
    --success: #247a52;
    --error: #a72e36;
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--page-bg);
    color: var(--ink-black);
    line-height: 1.5;
    font-size: 1.05rem;
}

button,
input,
textarea {
    font: inherit;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--accent-yellow);
    outline-offset: 3px;
}

h1,
h2,
h3,
.brutalist-title {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0;
}

.metadata-text {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--muted);
}

.site-header {
    position: relative;
    z-index: 10;
}

.header-tools,
.user-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-tools {
    flex-wrap: wrap;
    justify-content: flex-end;
}

.account-button,
.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--ink-black);
    background: var(--panel-bg);
    color: var(--ink-black);
    cursor: pointer;
    transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}

.account-button {
    min-height: 40px;
    gap: 0.45rem;
    padding: 0.45rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 3px 3px 0 var(--ink-black);
}

.icon-button {
    width: 40px;
    height: 40px;
    padding: 0;
}

.account-button svg,
.icon-button svg {
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 2;
}

.account-button:hover,
.icon-button:hover {
    background: var(--accent-yellow);
}

.account-button:active,
.icon-button:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.user-email {
    max-width: min(260px, 45vw);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.78rem;
    font-weight: 700;
}

.user-email.is-unverified::after {
    content: ' · da verificare';
    color: var(--error);
    font-weight: 600;
}

.search-container {
    position: sticky;
    top: 0;
    z-index: 80;
    background: var(--page-bg);
    border-bottom: 2px solid var(--ink-black);
    padding: 1.25rem 0;
}

#mainSearch {
    width: 100%;
    padding: 0.5rem 0;
    border: 0;
    border-radius: 0;
    outline: 0;
    background: transparent;
    color: var(--ink-black);
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: uppercase;
}

.publisher-section {
    transition: opacity 180ms ease;
}

.publisher-section.hidden {
    display: none;
}

.publisher-heading {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.publisher-heading h2 {
    margin: 0;
    font-size: 1.25rem;
}

.publisher-divider {
    height: 1px;
    flex: 1;
    background: var(--line);
}

.publisher-count {
    font-style: italic;
    opacity: 0.7;
}

.shelf-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, 140px);
    align-items: start;
    justify-content: start;
    gap: 2rem 1.5rem;
    padding: 1rem 0 2rem;
}

.book-container {
    width: 140px;
    position: relative;
}

.book-cover-button {
    display: block;
    width: 140px;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    cursor: pointer;
}

.book-cover-frame {
    position: relative;
    display: block;
    width: 140px;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    border: 2px solid var(--ink-black);
    background: #dedbd2;
    box-shadow: 4px 4px 0 var(--ink-black);
    transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 220ms ease;
}

.book-cover-button:hover .book-cover-frame,
.book-cover-button:focus-visible .book-cover-frame {
    transform: translateY(-7px);
    box-shadow: 8px 8px 0 var(--ink-black);
}

.book-cover-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-cover-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.68);
    color: #fff;
    opacity: 0;
    transition: opacity 180ms ease;
}

.book-cover-overlay span {
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1.25;
    text-transform: uppercase;
}

.book-cover-button:hover .book-cover-overlay,
.book-cover-button:focus-visible .book-cover-overlay {
    opacity: 1;
}

.book-cover-placeholder,
.modal-cover-placeholder {
    display: flex;
    width: 100%;
    height: 100%;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    text-align: center;
}

.book-cover-placeholder strong {
    font-size: 0.68rem;
    line-height: 1.25;
    text-transform: uppercase;
}

.book-cover-placeholder small,
.modal-cover-placeholder small {
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--muted);
}

.placeholder-divider {
    width: 2rem;
    height: 1px;
    margin: 0.65rem 0;
    background: rgba(26, 26, 26, 0.3);
}

.book-actions,
.book-modal-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.book-actions {
    justify-content: center;
    min-height: 48px;
    padding-top: 0.65rem;
}

.book-modal-actions {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}

.book-action {
    position: relative;
    display: inline-flex;
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
    align-items: center;
    justify-content: center;
    padding: 0;
    overflow: visible;
    border: 2px solid var(--ink-black);
    border-radius: 50%;
    background: var(--panel-bg);
    color: var(--ink-black);
    cursor: pointer;
    box-shadow: 2px 2px 0 var(--ink-black);
    transition: color 160ms ease, background-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.book-action svg {
    width: 21px;
    height: 21px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.9;
    transition: fill 160ms ease, transform 160ms ease;
}

.book-action:hover {
    transform: translateY(-2px);
    box-shadow: 3px 4px 0 var(--ink-black);
}

.book-action:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.book-action-hyped.is-active {
    border-color: var(--flame);
    background: #fff1e8;
    color: var(--flame);
}

.book-action-favorite.is-active {
    border-color: var(--heart);
    background: #fff0f4;
    color: var(--heart);
}

.book-action.is-active svg {
    fill: currentColor;
}

.book-action.just-activated svg {
    animation: action-pop 430ms cubic-bezier(0.2, 0.9, 0.3, 1.4);
}

.book-action.just-activated::after {
    position: absolute;
    inset: -7px;
    border: 2px solid currentColor;
    border-radius: 50%;
    content: '';
    animation: action-ring 430ms ease-out forwards;
    pointer-events: none;
}

.book-action.is-saving {
    cursor: wait;
    opacity: 0.65;
}

@keyframes action-pop {
    0% { transform: scale(0.7); }
    55% { transform: scale(1.35) rotate(-8deg); }
    100% { transform: scale(1); }
}

@keyframes action-ring {
    from { opacity: 0.8; transform: scale(0.7); }
    to { opacity: 0; transform: scale(1.3); }
}

.modal-hidden {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.modal-overlay {
    align-items: flex-start !important;
    overflow-y: auto;
    transition: opacity 180ms ease, visibility 180ms ease;
}

.modal-content-centered {
    margin-top: auto;
    margin-bottom: auto;
}

.modal-close {
    border: 0;
    background: transparent;
}

.modal-cover-image {
    width: auto;
    max-width: 100%;
    max-height: 50vh;
    border: 4px solid var(--ink-black);
    box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.18);
}

.modal-cover-placeholder {
    max-width: 280px;
    aspect-ratio: 2 / 3;
    height: auto;
    border: 4px solid var(--ink-black);
    background: #dedbd2;
    box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.18);
}

.modal-cover-placeholder strong {
    font-size: 1.15rem;
    line-height: 1.25;
    text-transform: uppercase;
}

.btn-brutalist {
    min-height: 48px;
    padding: 0.75rem 1.25rem;
    border: 2px solid var(--ink-black);
    background: var(--accent-yellow);
    color: var(--ink-black);
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 4px 4px 0 var(--ink-black);
    cursor: pointer;
    transition: transform 100ms ease, box-shadow 100ms ease;
}

.btn-brutalist:active {
    transform: translate(4px, 4px);
    box-shadow: none;
}

.auth-dialog {
    width: min(92vw, 460px);
    max-width: none;
    max-height: 90vh;
    margin: auto;
    padding: 0;
    overflow: visible;
    border: 0;
    background: transparent;
    color: var(--ink-black);
}

.auth-dialog::backdrop {
    background: rgba(26, 26, 26, 0.62);
    backdrop-filter: blur(3px);
}

.auth-panel {
    position: relative;
    max-height: 88vh;
    padding: 2rem;
    overflow-y: auto;
    border: 4px solid var(--ink-black);
    background: var(--panel-bg);
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.25);
}

.auth-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    border: 0;
}

.auth-heading {
    padding-right: 3rem;
}

.auth-heading h2 {
    margin: 0.25rem 0 1.5rem;
    font-size: 1.85rem;
    line-height: 1.1;
}

.auth-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-bottom: 1.5rem;
    border: 2px solid var(--ink-black);
}

.auth-tab {
    min-height: 44px;
    border: 0;
    background: transparent;
    color: var(--ink-black);
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
}

.auth-tab + .auth-tab {
    border-left: 2px solid var(--ink-black);
}

.auth-tab.is-active {
    background: var(--ink-black);
    color: #fff;
}

.auth-message {
    margin: 0 0 1rem;
    padding: 0.75rem;
    border-left: 4px solid var(--error);
    background: #f9e9ea;
    font-size: 0.85rem;
}

.auth-message[data-kind='success'] {
    border-color: var(--success);
    background: #e9f5ef;
}

.auth-message[data-kind='info'] {
    border-color: var(--accent-yellow);
    background: #fbf7db;
}

.auth-form {
    display: grid;
    gap: 0.65rem;
}

.auth-form label {
    margin-top: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.auth-form input {
    width: 100%;
    min-height: 48px;
    padding: 0.65rem 0.75rem;
    border: 2px solid var(--ink-black);
    border-radius: 0;
    background: #fff;
    color: var(--ink-black);
}

.auth-form.is-busy {
    opacity: 0.65;
}

.auth-submit {
    margin-top: 0.85rem;
}

.field-hint {
    margin: -0.25rem 0 0;
    color: var(--muted);
    font-size: 0.72rem;
}

.text-button {
    justify-self: start;
    padding: 0.35rem 0;
    border: 0;
    border-bottom: 1px solid currentColor;
    background: transparent;
    color: var(--ink-black);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
}

.toast-region {
    position: fixed;
    z-index: 200;
    right: 1rem;
    bottom: 1rem;
    display: grid;
    width: min(360px, calc(100vw - 2rem));
    gap: 0.65rem;
    pointer-events: none;
}

.toast {
    padding: 0.85rem 1rem;
    border: 2px solid var(--ink-black);
    background: var(--panel-bg);
    color: var(--ink-black);
    box-shadow: 4px 4px 0 var(--ink-black);
    font-size: 0.82rem;
    font-weight: 600;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 180ms ease, transform 180ms ease;
}

.toast.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.toast[data-kind='success'] {
    border-left: 7px solid var(--success);
}

.toast[data-kind='error'] {
    border-left: 7px solid var(--error);
}

.recommendation-page {
    min-height: calc(100vh - 150px);
}

.recommendation-hero {
    display: flex;
    min-height: calc(100vh - 190px);
    flex-direction: column;
    justify-content: center;
    padding: 5rem 0 7rem;
}

.recommendation-page.has-results .recommendation-hero {
    min-height: 0;
    padding-bottom: 5rem;
}

.recommendation-intro {
    max-width: 780px;
    margin-bottom: 2rem;
}

.recommendation-intro h2 {
    margin: 0.45rem 0 0.85rem;
    font-size: clamp(2.7rem, 7vw, 6.4rem);
    line-height: 0.92;
}

.recommendation-intro > p:last-child {
    max-width: 680px;
    color: var(--muted);
    font-size: clamp(1rem, 2vw, 1.2rem);
}

.recommendation-form {
    width: 100%;
}

.recommendation-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.recommendation-search-box {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
    border-bottom: 4px solid var(--ink-black);
}

.recommendation-search-box textarea {
    min-height: 112px;
    padding: 1rem 1rem 1rem 0;
    resize: vertical;
    border: 0;
    border-radius: 0;
    outline: 0;
    background: transparent;
    color: var(--ink-black);
    font-size: clamp(1.15rem, 2.4vw, 1.7rem);
    font-weight: 500;
    line-height: 1.35;
}

.recommendation-search-box textarea::placeholder {
    color: #8d8b84;
    opacity: 1;
}

.recommendation-search-box textarea:focus-visible {
    outline: 0;
}

.recommendation-submit {
    align-self: center;
    min-width: 175px;
    margin-left: 1.25rem;
}

.recommendation-submit:disabled {
    cursor: wait;
    opacity: 0.7;
}

.submit-loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
}

.submit-loading-bars {
    display: inline-flex;
    height: 0.9rem;
    align-items: flex-end;
    gap: 3px;
}

.submit-loading-bars > span {
    width: 3px;
    height: 100%;
    background: currentColor;
    transform: scaleY(0.35);
    transform-origin: bottom;
    animation: recommendation-search-pulse 900ms ease-in-out infinite;
}

.submit-loading-bars > span:nth-child(2) {
    animation-delay: 120ms;
}

.submit-loading-bars > span:nth-child(3) {
    animation-delay: 240ms;
}

@keyframes recommendation-search-pulse {
    0%,
    100% {
        opacity: 0.45;
        transform: scaleY(0.35);
    }

    50% {
        opacity: 1;
        transform: scaleY(1);
    }
}

.recommendation-form-meta {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.8rem;
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 600;
}

.recommendation-form-meta p {
    margin: 0;
}

.recommendation-message {
    margin: 1rem 0 0;
    padding: 0.85rem 1rem;
    border-left: 5px solid var(--error);
    background: #f9e9ea;
    font-size: 0.9rem;
    font-weight: 600;
}

.recommendation-message[data-kind='info'] {
    border-color: var(--accent-yellow);
    background: #fbf7db;
}

.recommendation-results {
    scroll-margin-top: 2rem;
    padding-bottom: 8rem;
}

.results-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 2.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--ink-black);
}

.results-heading h2 {
    margin: 0.25rem 0 0;
    font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1;
}

.recommendation-grid {
    display: grid;
    gap: 3rem;
}

.recommendation-card {
    display: grid;
    grid-template-columns: minmax(150px, 230px) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 5rem);
    padding: 2rem 0 3rem;
    border-bottom: 1px solid var(--line);
}

.recommendation-card-visual {
    position: relative;
    align-self: start;
}

.recommendation-cover {
    width: 100%;
    aspect-ratio: 2 / 3;
    overflow: hidden;
    border: 3px solid var(--ink-black);
    background: #dedbd2;
    box-shadow: 8px 8px 0 var(--ink-black);
}

.recommendation-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recommendation-cover-placeholder {
    display: flex;
    width: 100%;
    height: 100%;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    text-align: center;
}

.recommendation-cover-placeholder strong {
    font-size: 0.95rem;
    line-height: 1.25;
    text-transform: uppercase;
}

.recommendation-cover-placeholder small {
    color: var(--muted);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
}

.recommendation-rank {
    position: absolute;
    right: -1.25rem;
    bottom: -1.25rem;
    display: grid;
    width: 3.6rem;
    height: 3.6rem;
    place-items: center;
    border: 3px solid var(--ink-black);
    background: var(--accent-yellow);
    font-size: 1.1rem;
    font-weight: 800;
}

.recommendation-card-details {
    align-self: center;
}

.recommendation-card-details h3 {
    margin: 0.4rem 0;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 0.98;
}

.recommendation-author {
    margin: 0 0 0.8rem;
    color: var(--muted);
    font-size: 1.25rem;
    font-style: italic;
    font-weight: 500;
}

.recommendation-date {
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--line);
}

.recommendation-confidence {
    margin-top: 0.8rem;
    font-weight: 700;
}

.recommendation-reason {
    margin: 1.4rem 0;
    padding: 1rem 1.25rem;
    border-left: 5px solid var(--accent-yellow);
    background: var(--panel-bg);
    font-size: 1.05rem;
    font-weight: 600;
}

.recommendation-description {
    max-width: 740px;
    color: #484842;
    line-height: 1.7;
}

@media (min-width: 768px) {
    .modal-cover-image {
        max-height: 500px;
    }
}

@media (max-width: 767px) {
    .header-tools {
        width: 100%;
        justify-content: space-between;
    }

    .search-container {
        padding: 1rem 0;
    }

    .shelf-row {
        grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
        gap: 1.5rem 0.9rem;
    }

    .book-container,
    .book-cover-button,
    .book-cover-frame {
        width: 100%;
    }

    .book-container {
        max-width: 150px;
        justify-self: center;
    }

    .user-email {
        max-width: 42vw;
    }

    .auth-panel {
        padding: 1.5rem;
        box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.25);
    }

    .recommendation-hero {
        min-height: calc(100vh - 220px);
        padding: 4rem 0 5rem;
    }

    .recommendation-search-box {
        grid-template-columns: 1fr;
        border-bottom: 0;
    }

    .recommendation-search-box textarea {
        padding: 0.85rem 0;
        border-bottom: 3px solid var(--ink-black);
    }

    .recommendation-submit {
        width: calc(100% - 4px);
        margin: 1.25rem 4px 0 0;
    }

    .results-heading {
        align-items: start;
        flex-direction: column;
        gap: 0.75rem;
    }

    .recommendation-card {
        grid-template-columns: minmax(110px, 34vw) minmax(0, 1fr);
        gap: 1.5rem;
    }

    .recommendation-card-details h3 {
        font-size: clamp(1.5rem, 7vw, 2.3rem);
    }

}

@media (max-width: 520px) {
    .recommendation-card {
        grid-template-columns: 1fr;
    }

    .recommendation-card-visual {
        width: min(65vw, 220px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .submit-loading-bars > span {
        animation: none;
        opacity: 1;
        transform: none;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 1ms !important;
    }
}