/* Base styles and mobile-first design */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* Navigation */
.nav {
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
}

.nav-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s;
    min-height: 44px;
    display: flex;
    align-items: center;
}

.nav-link:hover {
    background-color: #34495e;
}

.nav-link.active {
    background-color: #3498db;
}

/* Main content */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.container {
    width: 100%;
}

h2 {
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

h3 {
    margin-bottom: 1rem;
    color: #34495e;
}

/* Card */
.card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Form styles */
.form-section {
    margin-bottom: 1.5rem;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

input[type="text"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    min-height: 44px;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

textarea {
    resize: vertical;
    font-family: inherit;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    min-height: 44px;
    display: inline-block;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-success {
    background-color: #27ae60;
    color: white;
}

.btn-success:hover {
    background-color: #229954;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    min-height: 36px;
}

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

/* Loading spinner */
.spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
}

.spinner-icon {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Messages */
.error-message {
    background-color: #fee;
    color: #c33;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    border-left: 4px solid #e74c3c;
}

.no-data {
    text-align: center;
    color: #999;
    padding: 2rem;
}

/* Filter tabs */
.filter-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    background: white;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    min-height: 44px;
}

.filter-tab:hover {
    border-color: #3498db;
    color: #3498db;
}

.filter-tab.active {
    background-color: #3498db;
    color: white;
    border-color: #3498db;
}

/* Item cards */
.item-card {
    background: white;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.item-header h3 {
    margin: 0;
    flex: 1;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
}

.badge-listed {
    background-color: #e8f4f8;
    color: #2980b9;
}

.badge-sold {
    background-color: #e8f8f5;
    color: #229954;
}

.item-details p {
    margin-bottom: 0.5rem;
}

.item-description {
    color: #666;
    font-style: italic;
}

.item-date {
    color: #999;
    font-size: 0.9rem;
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

/* Goals section */
.goals-section {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.goals-progress {
    margin-top: 2rem;
}

/* Profit indicators */
.profit-positive {
    color: #27ae60;
}

.profit-negative {
    color: #e74c3c;
}

/* Horizontal rule */
hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 1.5rem 0;
}

/* Responsive design */
@media (min-width: 768px) {
    .nav-title {
        display: inline-block;
        margin-right: 2rem;
        margin-bottom: 0;
    }

    .nav-links {
        display: inline-flex;
    }

    .goals-section {
        grid-template-columns: repeat(2, 1fr);
    }

    .modal-content {
        padding: 2.5rem;
    }
}