@font-face {
    font-family: 'HB Typewriter';
    src: url('../fonts/HBTypewriterBETA-Sans.otf') format('opentype');
    font-weight: 400;
    font-style: normal;
}

@font-face {
    font-family: 'HB Typewriter Serif';
    src: url('../fonts/HBTypewriterBETA-Serif.otf') format('opentype');
    font-weight: 400;
    font-style: normal;
}

:root {
    --black: #000;
    --white: #fff;
    --gray: #919191;
    --red: #e74c3c;
    --font: 'HB Typewriter', sans-serif;
    
    /* Typography - 3 sizes only */
    --text-big: 26px;
    --text-medium: 16px;
    --text-small: 13px;
}

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

body {
    font-family: var(--font);
    background: var(--white);
    color: var(--black);
    line-height: 1.5;
    font-size: var(--text-medium);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    margin: 0 auto;
    padding: 30px 45px;
}

/* Header */
.page-header {
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 100;
    padding: 25px 45px 45px;
}

.header-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
    direction: rtl;
    align-items: start;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 32px 16px;
    direction: rtl;
}

.page-title {
    font-size: var(--text-big);
    font-family: 'HB Typewriter Serif', serif;
    letter-spacing: -0.5px;
    margin: 0;
    line-height: 1.2;
    grid-column: 1;
}

.page-title a {
    color: inherit;
    text-decoration: none;
}

.page-title a:hover {
    text-decoration: underline;
}

.title-container {
    display: flex;
    gap: 6px;
    align-items: flex-start;
}

.scroll-top {
    opacity: 0;
    pointer-events: none;
    background: none;
    border: none;
    font-size: var(--text-big);
    font-family: 'HB Typewriter Serif', serif;
    cursor: pointer;
    padding: 0;
    margin-right: 12px;
    color: var(--black);
    line-height: 1;
    vertical-align: baseline;
    transition: opacity 0.2s ease;
}

.scroll-top:hover {
    opacity: 0.6;
}

.scroll-top.visible {
    opacity: 1;
    pointer-events: auto;
}

h1,h2,h3,h4,h5,h6 {
    font-weight: 400;
}

.btn-add {
    border: none;
    background-color: transparent;
    font-size: var(--text-big);
        font-family: 'HB Typewriter Serif', serif;
    cursor: pointer;
    letter-spacing: -0.5px;
    transition: background 0.2s;
    padding: 0;
    line-height: 1;
    white-space: nowrap;
    grid-column: 2;
    justify-self: start;
    align-self: start;
}

.btn-add:hover {
    text-decoration: underline;
}

/* Controls */
.controls {
    grid-column: 5;
    display: flex;
    gap: 32px;
    align-items: center;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.control-label {
    font-size: var(--text-small);
    text-transform: uppercase;
}

.show-all {
    color: var(--gray);
    text-decoration: none;
    text-transform: none;
    letter-spacing: 0;
}

.show-all:hover {
    color: var(--black);
}

.control-options {
    display: flex;
    gap: 4px;
    flex-direction: column;

}

.control-option {
    font-size: var(--text-small);
    text-decoration: none;
    color: var(--black);
    transition: all 0.15s;
    white-space: nowrap;
}

.control-option:hover {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.control-option.active {
    text-decoration: underline;
    text-underline-offset: 2px; 
}

.sort-arrow {
    display: inline;
    vertical-align: baseline;
    margin-right: -10px;
    position: relative;
    top: -1px;
}

.search-box {
    grid-column: 6;
    position: relative;
}

.search-box input {
    border: none;
    border-bottom: 1px solid var(--gray);
    padding: 0px 0px 8px 0px;
    font-size: var(--text-small);
    font-family: var(--font);
    width: 100%;
    transition: border-color 0.15s;
}

.search-clear {
    position: absolute;
    left: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 20px;
    color: var(--gray);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

.search-clear:hover {
    color: var(--black);
}

.search-box input:focus {
    outline: none;
    border-color: var(--black);
}

/* Card */
.card {
    background: var(--white);
    transition: border-color 0.2s, opacity 0.2s;
    animation: fadeIn 0.3s ease-out both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Staggered animation for cards */
.card:nth-child(1) { animation-delay: 0s; }
.card:nth-child(2) { animation-delay: 0.03s; }
.card:nth-child(3) { animation-delay: 0.06s; }
.card:nth-child(4) { animation-delay: 0.09s; }
.card:nth-child(5) { animation-delay: 0.12s; }
.card:nth-child(6) { animation-delay: 0.15s; }
.card:nth-child(n+7) { animation-delay: 0.18s; }

.card:hover {
    border-color: var(--black);
}

.card--chosen {
    opacity: 0.5;
}

.card-image {
    position: relative;
    aspect-ratio: 3/4;
    background: var(--gray);
    overflow: hidden;
}

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

.card-image .placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--gray) 0%, var(--gray) 100%);
}

.badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--black);
    color: var(--white);
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 8px;
}

.card-content {
    padding-top: 8px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.card-title {
    font-size: var(--text-medium);
     margin: 0 0 4px 0;
    line-height: 1.3;
    flex: 1;
    text-wrap: pretty;
}

.card-title .arrow {
    color: var(--black);
    font-size: 18px;
    font-family: 'HB Typewriter Serif', sans-serif;
    text-decoration: none;
}

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

.card-publisher {
    font-size: var(--text-small);
    margin-bottom: 4px;
}

.card-meta {
    font-size: var(--text-small);
    font-family: 'HB Typewriter Serif', serif;
    color: var(--gray);
}

.vote-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.btn-vote {
    background: transparent;
    border: none;
    padding: 0;
    font-size: 18px;
    cursor: pointer;
    line-height: 1;
}

.btn-vote .heart {
    color: var(--gray);
    transition: color 0.15s;
}

.btn-vote:hover .heart {
    color: var(--red);
}

.btn-vote.voted .heart {
    color: var(--red);
}

.vote-count {
    font-size: var(--text-small);
}

/* Empty state */
.empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--gray);
    animation: fadeIn 0.3s ease-out both;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-box {
    background: var(--white);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    padding: 18px 30px 30px 30px;
    direction: rtl;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    font-family: 'HB Typewriter Serif', serif;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--text-big);
    cursor: pointer;
    color: var(--black);
    line-height: 1;
    padding: 0;
    font-family: 'HB Typewriter Serif', serif;

}

/* When close button is not in header (book detail modal) */
.modal-box > .modal-close {
    position: absolute;
    top: 18px;
    left: 30px;
}

.modal-close:hover {
    color: var(--gray);
}

.modal-box h2 {
    font-size: var(--text-big);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

/* Form */
.field {
    margin-bottom: 20px;
}

.field label {
    display: block;
    font-size: var(--text-small);
     text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    color: var(--gray);
}

.field input,
.field textarea,
.field select {
    width: 100%;
    padding: 0 0 8px 0;
    font-size: var(--text-medium);
    font-family: var(--font);
    border: none;
    border-bottom: 1px solid var(--gray);
    transition: border-color 0.15s;
    background: transparent;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
    outline: none;
    border-color: var(--black);
}

.field textarea {
    resize: none;
    overflow: hidden;
    min-height: 32px;
    line-height: 1;
    vertical-align: top;
    display: block;
    padding: 4px 0 8px 0;
}

/* Field validation */
.field.invalid {
    position: relative;
}

.field.invalid input,
.field.invalid textarea,
.field.invalid select {
    border-color: var(--red);
    color: var(--red);
}

.field.invalid input::placeholder,
.field.invalid textarea::placeholder {
    color: var(--red);
}

.field.invalid::after {
    content: '!';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--red);
    font-size: var(--text-medium);
    font-weight: bold;
}

.field.shake {
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* Role switch (student/tutor) */
.role-switch {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--gray);
}

.role-switch input[type="radio"] {
    display: none;
}

.role-switch label {
    flex: 1;
    text-align: center;
    padding: 0 16px 8px;
    font-size: var(--text-medium);
    color: var(--gray);
    cursor: pointer;
    transition: all 0.15s;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.role-switch label:hover {
    color: var(--black);
}

.role-switch input[type="radio"]:checked + label {
    color: var(--black);
    border-bottom-color: var(--black);
}

/* Dropzone (Are.na style) */
.dropzone {
    background: #f5f5f5;
    border: none;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.dropzone:hover {
    background: #eee;
}

.dropzone.dragover {
    background: #e8e8e8;
}

.dropzone.has-preview {
    cursor: default;
}

.dropzone-content {
    text-align: center;
    padding: 20px;
}

.dropzone-text {
    font-size: var(--text-medium);
    color: var(--black);
    line-height: 1.6;
}

.dropzone-text u {
    cursor: pointer;
}

.dropzone-file {
    display: none;
}

.dropzone-preview {
    position: relative;
}

.dropzone-preview img {
    max-width: 150px;
    max-height: 200px;
    object-fit: contain;
}

.dropzone-preview.hidden {
    display: none;
}

.dropzone-text.hidden {
    display: none;
}

.dropzone-remove {
    position: absolute;
    top: -8px;
    left: -8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--black);
    color: var(--white);
    border: none;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dropzone-remove:hover {
    background: var(--red);
}

.btn-submit {
    width: 100%;
    background: var(--black);
    color: var(--white);
    border: none;
    padding: 14px;
    font-size: var(--text-small);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 12px;
}

.btn-submit:hover {
    background: var(--gray);
}

/* Responsive */
@media (max-width: 2000px) {
    .header-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .cards-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .page-title {
        grid-column: 1;
    }
    
    .btn-add {
        grid-column: 2;
    }
    
    .controls {
        grid-column: 4;
    }
    
    .search-box {
        grid-column: 5;
    }
}

@media (max-width: 1400px) {
    .header-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .page-title {
        grid-column: 1;
    }
    
    .btn-add {
        grid-column: 2;
    }
    
    .controls {
        grid-column: 3;
    }
    
    .search-box {
        grid-column: 4;
    }
}

@media (max-width: 1100px) {
    .header-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .page-title {
        grid-column: 1;
    }
    
    .btn-add {
        grid-column: 2;
    }
    
    .controls {
        grid-column: 3;
        grid-row: 1;
    }
    
    .search-box {
        grid-column: 3;
        grid-row: 2;
        align-self: start;
    }
}

@media (max-width: 800px) {
    .header-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .page-title {
        grid-column: 1;
        grid-row: 1;
    }
    
    .btn-add {
        grid-column: 1;
        grid-row: 2;
    }
    
    .controls {
        grid-column: 2;
        grid-row: 1;
    }
    
    .search-box {
        grid-column: 2;
        grid-row: 2;
        align-self: start;
    }
}

@media (max-width: 600px) {
    .header-grid,
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .page-title {
        grid-column: 1;
        grid-row: 1;
    }
    
    .btn-add {
        grid-column: 1;
        grid-row: 2;
    }
    
    .controls {
        grid-column: 1;
        grid-row: 3;
    }
    
    .search-box {
        grid-column: 1;
        grid-row: 4;
    }
    
    .modal-box {
        padding: 24px;
    }
}

/* Card Actions (vote + comments) */
.card-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.comment-indicator {
    display: none;
    align-items: center;
    gap: 4px;
}

.comment-icon {
    font-size: 14px;
    opacity: 0.6;
}

.comment-count {
    font-size: var(--text-small);
    color: var(--gray);
}

/* Card clickable */
.card {
    cursor: pointer;
}

/* Book Detail Modal */
.modal-box--large {
    max-width: 850px;
}

.book-detail {
    display: flex;
    gap: 48px;
    margin-bottom: 40px;
}

.book-detail-cover {
    width: 280px;
    flex-shrink: 0;
}

.book-detail-cover img {
    width: 100%;
    height: auto;
    display: block;
}

.book-detail-cover .placeholder {
    width: 100%;
    aspect-ratio: 2/3;
    background: var(--gray);
}

.book-detail-info {
    flex: 1;
    padding-left: 50px;
}

.book-detail-info h2 {
    font-size: var(--text-big);
    margin-top: 0;
    margin-bottom: 12px;
    text-transform: none;
    letter-spacing: 0;
}

.book-detail-info h2 a {
    color: var(--black);
    text-decoration: none;
    display: inline;
}

.book-detail-info h2 a:hover {
    text-decoration: underline;
}

.book-detail-info h2 .arrow {
    font-size: var(--text-big);
    font-family: 'HB Typewriter Serif', serif;
    margin-right: 8px;
}

.book-detail-publisher {
    font-size: var(--text-medium);
    margin-bottom: 8px;
}

.book-detail-meta {
    font-size: var(--text-small);
    font-family: 'HB Typewriter Serif', serif;
    color: var(--gray);
    margin-bottom: 16px;
}

.book-detail-notes {
    font-size: var(--text-medium);
    line-height: 1.5;
    margin-bottom: 16px;
    direction: rtl;
}

.book-detail-link {
    display: inline-block;
    font-size: var(--text-small);
    color: var(--black);
    margin-bottom: 20px;
}

.book-detail-link:hover {
    text-decoration: none;
}

.book-detail-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.book-detail-actions .badge {
    position: static;
}

/* Comments Section */
.comments-section {
    border-top: 1px solid #eee;
    padding-top: 16px;
    margin-top: 16px;
}

.comments-section h3 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    color: var(--gray);
}

.comments-list {
    margin-bottom: 16px;
}

.no-comments {
    font-size: 11px;
    color: var(--gray);
    font-style: italic;
}

.comment {
    padding: 8px 0;
    border-bottom: 1px solid #f5f5f5;
}

.comment:last-child {
    border-bottom: none;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2px;
}

.comment-author {
    font-size: 11px;
    font-weight: bold;
}

.comment-date {
    font-size: 11px;
    color: var(--gray);
}

.comment-text {
    font-size: 12px;
    line-height: 1.3;
}

/* Add Comment Form */
.add-comment-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.add-comment-form .field {
    margin-bottom: 0;
}

.add-comment-form .field input,
.add-comment-form .field textarea {
    font-size: 12px;
    padding: 0 0 6px 0;
}

.add-comment-form .btn-submit {
    align-self: flex-start;
    width: auto;
    padding: 8px 16px;
    margin-top: 4px;
    font-size: 11px;
}

@media (max-width: 700px) {
    .book-detail {
        flex-direction: column;
    }
    
    .book-detail-cover {
        width: 100%;
        max-width: 200px;
    }
}