:root {
    --primary: #10b981; /* Emerald 500 */
    --primary-dark: #059669;
    --secondary: #3b82f6; /* Blue 500 */
    --accent: #f59e0b; /* Amber 500 */
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success: #22c55e;
    --danger: #ef4444;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeIn 0.8s ease-out;
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    color: var(--primary);
    width: 32px;
    height: 32px;
}

h1 {
    font-weight: 700;
    font-size: 2rem;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    padding: 2rem;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
}

/* Upload Section */
.upload-card {
    max-width: 600px;
    margin: 0 auto;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 0.75rem;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #fdfdfd;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary);
    background: #ecfdf5;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    margin-top: 1rem;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background-color: #16a34a;
}

/* Status */
.status-container {
    text-align: center;
    margin: 2rem 0;
    animation: fadeIn 0.5s;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 1s linear infinite;
}

.progress-bar {
    width: 300px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    margin: 0.5rem auto;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s;
}

/* Table */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.legend {
    display: flex;
    gap: 1rem;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-retail {
    background: #eff6ff;
    color: #3b82f6;
    border: 1px solid #bfdbfe;
}

.badge-wholesale {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

th {
    text-align: left;
    padding: 1rem;
    background: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

input.row-edit {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-family: inherit;
}

input.row-edit:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.1);
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
}

.delete-btn:hover {
    color: var(--danger);
    background: #fef2f2;
}

.hidden {
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}