/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #006d3a;
    --color-secondary: #2D5016;
    --color-accent: #6de1f9;
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text: #1D1D1F;
    --color-text-light: #86868B;
    --color-border: #D2D2D7;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.home-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.header-image {
    display: flex;
    align-items: flex-start;
}

.header-image img {
    max-height: 80px;
    width: auto;
    object-fit: contain;
}

.fixed-bottom-image {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
    pointer-events: none;
}

.fixed-bottom-image img {
    max-height: 60px;
    width: auto;
    object-fit: contain;
    opacity: 0.8;
}

footer{
    text-align: center;
    font-size: 12px;
    color: rgba(1, 170, 99, 0.748);
    margin-top: var(--spacing-xl);
}
.header-subheader {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

h1 {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--color-text);
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-back {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background-color: #00b56f;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(157, 248, 255, 0.3);
}

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

.btn-secondary:hover {
    background-color: var(--color-surface);
    border-color: var(--color-text-light);
}

.btn-back {
    background-color: transparent;
    color: var(--color-text);
    padding: 8px 16px;
    font-size: 14px;
}

.btn-back:hover {
    color: var(--color-primary);
}

/* User Prompt */
.user-prompt {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--color-shadow);
    max-width: 400px;
    margin: var(--spacing-xl) auto;
}

.user-prompt p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    font-size: 16px;
}

.user-prompt input {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 16px;
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
    font-family: inherit;
}

.user-prompt input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.book-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 8px var(--color-shadow);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.book-card.trade-in-progress {
    opacity: 0.6;
    filter: grayscale(30%);
    cursor: not-allowed;
}

.book-card.trade-in-progress:hover {
    transform: none;
    box-shadow: 0 2px 8px var(--color-shadow);
}

/* Exchange Sticker - Circular Badge Design */
.exchange-sticker {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 10;
    transform: rotate(-5deg);
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.25));
    pointer-events: none;
}

.exchange-sticker-burst {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ff7f30 0%, #ffcc00 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 0 15px rgba(255, 140, 66, 0.5),
        inset 0 0 15px rgba(255, 255, 255, 0.25),
        0 0 0 2px rgba(255, 255, 255, 0.4);
}

.exchange-sticker-burst::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0.1) 100%);
    z-index: -1;
    filter: blur(3px);
}

.exchange-sticker-text {
    color: var(--color-accent);
    font-size: 9px;
    font-weight: 800;
    text-align: center;
    line-height: 1.15;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    padding: 0 6px;
    max-width: 80px;
}

.book-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
    background-color: var(--color-border);
    display: block;
}

.book-info {
    padding: var(--spacing-sm);
}

.book-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

/* Tabs Styles */
.tabs-container {
    display: flex;
    gap: var(--spacing-xs);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    margin-bottom: -1px;
}

.tab-btn:hover {
    color: var(--color-text);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Filter Buttons */
.filter-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-primary);
}

.filter-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Trade Offer Card Styles */
.trade-offer-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px var(--color-shadow);
    width: 100%;
    max-width: 600px;
}

#sentOffersGrid,
#receivedOffersGrid,
#acceptedTradesGrid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.trade-offer-books {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.trade-offer-book {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.trade-offer-image {
    width: 100%;
    max-width: 100px;
    height: 150px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xs);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.trade-offer-book-info {
    width: 100%;
}

.trade-offer-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.trade-offer-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.trade-offer-author {
    font-size: 12px;
    color: var(--color-text-light);
}

.trade-offer-arrow {
    font-size: 20px;
    color: var(--color-primary);
    font-weight: 300;
    flex-shrink: 0;
}

.trade-offer-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
    font-size: 13px;
    color: var(--color-text);
    border-left: 3px solid var(--color-primary);
}

.trade-offer-status {
    margin-top: var(--spacing-sm);
    font-size: 12px;
    color: var(--color-text-light);
    font-style: italic;
}

.trade-offer-actions {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.trade-offer-sender {
    font-size: 13px;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.book-user {
    font-size: 12px;
    color: var(--color-secondary);
    font-weight: 500;
    margin-top: var(--spacing-xs);
    cursor: pointer;
    transition: var(--transition);
}

.book-user:hover {
    color: var(--color-primary);
}

.book-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
}

.btn-trade {
    background-color: var(--color-secondary);
    color: white;
}

.btn-trade:hover {
    background-color: #1F350F;
}

.btn-delete {
    background-color: #FF3B30;
    color: white;
}

.btn-delete:hover {
    background-color: #D70015;
}

/* User View */
.user-view-container {
    margin-top: var(--spacing-lg);
}

.user-header {
    margin-bottom: var(--spacing-lg);
}

.user-header h2 {
    font-size: 28px;
    font-weight: 600;
    margin-top: var(--spacing-sm);
    color: var(--color-text);
}

.user-info {
    background-color: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.user-info h2 {
    font-size: 24px;
    margin-bottom: var(--spacing-xs);
}

.book-count {
    color: var(--color-text-light);
    font-size: 14px;
}

/* Add Book Section */
.add-book-section {
    background-color: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.add-book-section h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.add-book-section form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.add-book-section input,
.add-book-section textarea {
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.add-book-section input:focus,
.add-book-section textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.add-book-section textarea {
    resize: vertical;
    min-height: 80px;
}

.add-book-section input[type="file"] {
    padding: 8px;
    cursor: pointer;
}

/* Condition Dropdown */
.condition-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.condition-field label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

.condition-field select {
    width: auto;
    max-width: 200px;
    padding: 14px 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-family: inherit;
    background-color: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%231D1D1F' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.condition-field select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 109, 58, 0.1);
}

.condition-field select:hover {
    border-color: var(--color-text-light);
}


/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

.modal-content {
    background-color: var(--color-surface);
    margin: 5% auto;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.3s ease;
    position: relative;
}

.close-modal {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-md);
    font-size: 28px;
    font-weight: 300;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
}

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

.modal-content h2 {
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
}

.trade-modal-content h2 {
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
}

.modal-content label {
    display: block;
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

.modal-content select,
.modal-content textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.modal-content select:focus,
.modal-content textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 109, 58, 0.1);
}

.modal-content input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.modal-content input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 109, 58, 0.1);
}

.modal-content textarea {
    resize: vertical;
    min-height: 60px;
}

.modal-content #submitTradeBtn {
    margin-top: var(--spacing-sm);
    width: 100%;
}

/* Trade Modal Styles */
.trade-modal-content {
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.trade-books-display {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
}

.trade-book-card {
    flex: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.trade-book-card h3 {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.trade-book-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    flex: 1;
    justify-content: flex-start;
}

.trade-book-image {
    width: 100%;
    max-width: 120px;
    height: 180px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin: 0 auto var(--spacing-xs);
    display: block;
    box-shadow: 0 2px 8px var(--color-shadow);
    flex-shrink: 0;
}

.trade-book-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
    min-height: 20px;
    max-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.2;
    overflow: hidden;
    word-wrap: break-word;
}

.trade-book-author {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    min-height: 18px;
    max-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.2;
    overflow: hidden;
    word-wrap: break-word;
}

.book-select {
    width: 100%;
    max-width: 200px;
    margin-top: auto;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-family: inherit;
    background-color: var(--color-surface);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.book-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.trade-arrow {
    font-size: 24px;
    color: var(--color-primary);
    font-weight: 300;
    flex-shrink: 0;
    align-self: center;
    margin-top: 90px;
}

.trade-success {
    background-color: #34C759;
    color: white;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    text-align: center;
    margin: var(--spacing-md) 0;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

.trade-pending {
    font-size: 11px;
    color: var(--color-secondary);
    font-weight: 500;
    margin-top: 4px;
    text-transform: lowercase;
    letter-spacing: 0.3px;
}

.trade-in-progress-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--color-primary);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.empty-state p {
    font-size: 16px;
    margin-top: var(--spacing-sm);
}

/* Responsive */
@media (max-width: 768px) {
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }

    .book-image {
        height: 220px;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .header-actions {
        width: 100%;
    }

    .header-actions button,
    .header-actions a {
        flex: 1;
    }

    .trade-books-display {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .trade-arrow {
        transform: rotate(90deg);
        font-size: 24px;
    }

    .trade-book-image {
        max-width: 120px;
        height: 180px;
    }
}

/* Signup Page Styles - Apple II Era Minimalist */
.signup-page {
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Courier New', Courier, monospace;
}

.signup-container {
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-xl);
}

.signup-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.signup-header h1 {
    font-size: 42px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -1px;
    margin-bottom: 4px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.signup-header h2 {
    font-size: 20px;
    font-weight: 400;
    color: var(--color-text-light);
    font-style: italic;
    margin-top: 4px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.signup-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.signup-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px var(--color-shadow);
}

.form-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.form-row label {
    min-width: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    text-align: right;
    font-family: 'Courier New', Courier, monospace;
}

.form-row input {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: var(--transition);
}

.form-row input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 109, 58, 0.1);
}

.signup-button {
    margin-top: var(--spacing-sm);
    padding: 12px 24px;
    background-color: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    font-family: 'Courier New', Courier, monospace;
    cursor: pointer;
    transition: var(--transition);
    align-self: flex-end;
}

.signup-button:hover {
    background-color: #005a2f;
    border-color: #005a2f;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 109, 58, 0.3);
}

.signup-button:active {
    transform: translateY(0);
}

.signup-footer {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.signup-footer p {
    font-size: 13px;
    color: var(--color-secondary);
    line-height: 1.6;
    margin-bottom: 4px;
    font-family: 'Courier New', Courier, monospace;
}

.signup-footer p:last-child {
    font-style: italic;
    color: var(--color-text-light);
}

/* Responsive for signup page */
@media (max-width: 768px) {
    .signup-container {
        padding: var(--spacing-md);
    }

    .signup-header h1 {
        font-size: 32px;
    }

    .signup-header h2 {
        font-size: 18px;
    }

    .form-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .form-row label {
        min-width: auto;
        text-align: left;
    }

    .form-row input {
        width: 100%;
    }

    .signup-button {
        align-self: stretch;
    }
}

/* Vintage Library Card Styles */
.library-card-modal {
    max-width: 600px;
    padding: var(--spacing-lg);
}

.library-card-container {
    background: #FFF8DC;
    background: linear-gradient(to bottom, #FFFEF5 0%, #FFF8DC 100%);
    border: 2px solid #D4A574;
    border-radius: 8px;
    padding: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    font-family: 'Courier New', 'Times New Roman', serif;
    position: relative;
    min-height: 500px;
}

.library-card-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 23px,
            rgba(0, 0, 0, 0.03) 23px,
            rgba(0, 0, 0, 0.03) 24px
        );
    pointer-events: none;
    border-radius: 6px;
}

.library-card-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid #8B7355;
}

.library-card-instruction {
    font-size: 11px;
    line-height: 1.4;
    color: #2C2416;
    margin: 0;
    text-align: left;
    font-weight: 400;
}

.library-card-table {
    background: #FFFFFF;
    border: 1px solid #8B7355;
    border-radius: 4px;
    overflow: hidden;
}

.library-card-table-header {
    display: grid;
    grid-template-columns: 1fr 2fr;
    background: #E8DCC6;
    border-bottom: 2px solid #8B7355;
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #2C2416;
}

.library-card-date-header,
.library-card-participants-header {
    padding: 8px 12px;
    border-right: 1px solid #8B7355;
}

.library-card-participants-header {
    border-right: none;
}

.library-card-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    border-bottom: 1px solid #D4A574;
    min-height: 32px;
    background: rgba(255, 255, 255, 0.5);
}

.library-card-row-alt {
    background: rgba(248, 245, 240, 0.8);
}

.library-card-row:last-child {
    border-bottom: none;
}

.library-card-date {
    padding: 8px 12px;
    border-right: 1px solid #D4A574;
    font-size: 12px;
    font-weight: 600;
    color: #1E3A8A;
    font-family: 'Courier New', monospace;
    display: flex;
    align-items: center;
}

.library-card-participants {
    padding: 8px 12px;
    font-size: 12px;
    color: #2C2416;
    display: flex;
    align-items: center;
    font-family: 'Courier New', monospace;
    gap: 8px;
}

.library-card-separator {
    color: #8B7355;
    font-weight: 400;
}

.library-card-user-link {
    color: #1E3A8A;
    text-decoration: underline;
    cursor: pointer;
    transition: color 0.2s ease;
}

.library-card-user-link:hover {
    color: #3B82F6;
    text-decoration: underline;
}

.library-card-row-blank {
    opacity: 0.3;
}