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

:root {
    --primary-dark: #1A1A2E;
    --secondary-dark: #16213E;
    --tertiary-dark: #0F3460;
    --accent-color: #E94560;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #6C757D;
    --border-color: #DEE2E6;
    --success-color: #28A745;
    --warning-color: #FFC107;
    --danger-color: #DC3545;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 50%, var(--tertiary-dark) 100%);
    min-height: 100vh;
    color: var(--white);
    line-height: 1.6;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-bottom: 60px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, rgba(233, 69, 96, 0.9) 0%, rgba(233, 69, 96, 0.7) 100%);
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 600px;
    margin: 0 auto;
}

.app-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.heart-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.app-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Navigation Tabs */
.nav-tabs {
    display: flex;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    margin: 1rem;
    padding: 0.5rem;
    overflow-x: auto;
    gap: 0.5rem;
}

.nav-tab {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: var(--white);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: calc(var(--border-radius) - 4px);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-tab:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-tab.active {
    background: linear-gradient(135deg, var(--accent-color) 0%, #ff6b8a 100%);
    box-shadow: var(--shadow);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 1rem;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

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

/* Filters Section */
.filters-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.search-container {
    margin-bottom: 1rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 1rem;
    transition: var(--transition);
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.filters-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.filter-select {
    padding: 0.75rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.filter-select option {
    background: var(--secondary-dark);
    color: var(--white);
}

/* Items Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.item-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.item-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.item-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), #ff6b8a);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.item-category-icon {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

.item-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    flex: 1;
}

.item-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

.status-a-doar {
    background: rgba(255, 193, 7, 0.2);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.status-agendado {
    background: rgba(0, 123, 255, 0.2);
    color: #007bff;
    border: 1px solid #007bff;
}

.status-doado {
    background: rgba(40, 167, 69, 0.2);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.item-details {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.item-detail {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

.item-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: calc(var(--border-radius) - 4px);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, #ff6b8a 100%);
    color: var(--white);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #34ce57 100%);
    color: var(--white);
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Form Styles */
.form-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.form-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--white);
    font-size: 1.8rem;
}

.item-form {
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--white);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.form-group select option {
    background: var(--secondary-dark);
    color: var(--white);
}

.photo-preview {
    margin-top: 0.5rem;
    text-align: center;
}

.photo-preview img {
    max-width: 200px;
    max-height: 200px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
}

/* Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.25rem;
}

.stat-content p {
    opacity: 0.9;
    font-size: 0.9rem;
}

/* History Styles */
.history-container {
    max-width: 800px;
    margin: 0 auto;
}

.history-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.donated-items {
    display: grid;
    gap: 1rem;
}

.donated-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border-left: 4px solid var(--success-color);
    transition: var(--transition);
}

.donated-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow);
}

.donated-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.donated-item-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
}

.donated-date {
    font-size: 0.8rem;
    opacity: 0.8;
    color: var(--success-color);
}

.donated-item-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Reminders Styles */
.reminders-container {
    max-width: 600px;
    margin: 0 auto;
}

.reminder-settings {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.reminder-settings h3 {
    margin-bottom: 1rem;
    color: var(--white);
}

.setting-group {
    margin-bottom: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--white);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-color);
}

.active-reminders {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.active-reminders h3 {
    margin-bottom: 1rem;
    color: var(--white);
}

.reminder-item {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid var(--warning-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.reminder-content {
    flex: 1;
}

.reminder-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.reminder-message {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Empty States */
.empty-state,
.empty-history,
.no-reminders {
    text-align: center;
    padding: 3rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    border: 2px dashed rgba(255, 255, 255, 0.3);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.empty-state h3,
.empty-history h3,
.no-reminders h4 {
    margin-bottom: 0.5rem;
    color: var(--white);
}

.empty-state p,
.empty-history p,
.no-reminders p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--tertiary-dark) 100%);
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.modal-header h3 {
    color: var(--white);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 1.5rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1100;
}

.toast {
    background: var(--success-color);
    color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
    max-width: 300px;
}

.toast.error {
    background: var(--danger-color);
}

.toast.warning {
    background: var(--warning-color);
    color: var(--primary-dark);
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Footer */
.footer {
    background: var(--primary-dark);
    text-align: center;
    padding: 1rem;
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.8rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-title {
        font-size: 2rem;
    }
    
    .nav-tabs {
        margin: 0.5rem;
        padding: 0.25rem;
    }
    
    .nav-tab {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
        min-width: 100px;
    }
    
    .main-content {
        padding: 0.5rem;
    }
    
    .filters-container {
        grid-template-columns: 1fr;
    }
    
    .items-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .form-container {
        padding: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .stats-cards {
        grid-template-columns: 1fr;
    }
    
    .history-filters {
        flex-direction: column;
    }
    
    .item-actions {
        flex-direction: column;
    }
    
    .donated-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .donated-item-details {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 1rem;
        max-height: calc(100vh - 2rem);
    }
    
    .toast-container {
        top: 0.5rem;
        right: 0.5rem;
        left: 0.5rem;
    }
    
    .toast {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .heart-icon {
        font-size: 1.5rem;
    }
    
    .app-subtitle {
        font-size: 1rem;
    }
    
    .header {
        padding: 1.5rem 1rem;
    }
    
    .nav-tab {
        padding: 0.5rem;
        font-size: 0.75rem;
        min-width: 80px;
    }
    
    .item-card {
        padding: 1rem;
    }
    
    .item-title {
        font-size: 1rem;
    }
    
    .form-container {
        padding: 0.75rem;
    }
    
    .form-container h2 {
        font-size: 1.5rem;
    }
}

/* Print Styles */
@media print {
    .nav-tabs,
    .filters-section,
    .item-actions,
    .form-actions,
    .btn,
    .modal,
    .toast-container {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .app-container {
        max-width: none;
        padding: 0;
    }
    
    .item-card,
    .donated-item,
    .stat-card {
        background: white !important;
        border: 1px solid #ccc !important;
        color: black !important;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles for Better Accessibility */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
    }
    
    .item-card,
    .form-container,
    .stat-card {
        border: 2px solid var(--white);
    }
}