:root {
    --primary-color: #6D6D6D;
    --primary-hover: #555555;
    --accent-color: #8B8B8B;
    --bg-color: #FFFFFF;
    --bg-secondary: #FAFAFA;
    --bg-tertiary: #F5F5F5;
    --border-color: #EEEEEE;
    --border-hover: #DDDDDD;
    --text-color: #2C2C2C;
    --text-secondary: #6D6D6D;
    --text-light: #999999;
    --success-color: #4CAF50;
    --error-color: #F44336;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.12);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 85%;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    display: block;
    height: 28px;
    transition: opacity 0.2s;
}

.logo a {
    display: block;
    line-height: 0;
}

.logo img:hover {
    opacity: 0.8;
}

.nav {
    display: flex;
    gap: 40px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.01em;
    transition: color 0.2s;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.2s;
}

.nav-link:hover {
    color: var(--text-color);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link-logout {
    color: var(--error-color);
}

.nav-link-logout::after {
    background: var(--error-color);
}

/* Main */
.main {
    min-height: calc(100vh - 180px);
    padding: 40px 0;
}

/* Footer */
.footer {
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #FAFAFA 0%, #F0F0F0 100%);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 440px;
}

.login-box {
    background: var(--bg-color);
    padding: 50px 45px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.login-logo {
    text-align: center;
    margin-bottom: 40px;
}

.login-logo img {
    max-width: 100%;
    height: auto;
    width: 280px;
    display: inline-block;
}

.login-box h1 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 10px;
    text-align: center;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

.login-box p.subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 35px;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 35px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

/* Dashboard */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

/* Card */
.card {
    background: var(--bg-color);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.card h3 {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
    letter-spacing: -0.01em;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    font-size: 14px;
    line-height: 1.5;
}

/* Forms */
.form-container {
    background: var(--bg-color);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.form-container h2 {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 25px;
    color: var(--text-color);
    letter-spacing: -0.01em;
}

.login-form {
    margin-top: 0;
}

.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.2s;
    background: var(--bg-color);
}

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

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--border-hover);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

/* Filters */
.filters {
    background: var(--bg-color);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
}

.filter-form {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-form input,
.filter-form select {
    padding: 11px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.filter-form input[type="text"] {
    flex: 1;
    min-width: 250px;
}

.filter-form select {
    min-width: 150px;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 4px rgba(109, 109, 109, 0.2);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 8px rgba(109, 109, 109, 0.25);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(109, 109, 109, 0.2);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
}

.btn-danger {
    background: var(--error-color);
    color: white;
    box-shadow: 0 2px 4px rgba(244, 67, 54, 0.2);
}

.btn-danger:hover {
    background: #d32f2f;
    box-shadow: 0 4px 8px rgba(244, 67, 54, 0.25);
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: 7px 14px;
    font-size: 13px;
}

/* Alerts */
.alert {
    padding: 16px 20px;
    border-radius: 10px;
    margin-bottom: 25px;
    font-weight: 500;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert__icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.alert-success {
    background: #F1F8F4;
    color: #1E7E34;
    border: 1px solid #C3E6CB;
}

.alert-success .alert__icon {
    stroke: #1E7E34;
}

.alert-error {
    background: #FFF4F4;
    color: #C62828;
    border: 1px solid #FFCDD2;
}

.alert-error .alert__icon {
    stroke: #C62828;
}

.alert-info {
    background: #E3F2FD;
    color: #1565C0;
    border: 1px solid #90CAF9;
}

.alert-info .alert__icon {
    stroke: #1565C0;
}

.alert-warning {
    background: #FFF8E1;
    color: #F57C00;
    border: 1px solid #FFE082;
}

.alert-warning .alert__icon {
    stroke: #F57C00;
}

/* Tables */
.table-container {
    background: var(--bg-color);
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

/* Products table with scroll wrapper */
.table-container.sol-products-table {
    overflow-x: auto;
}

.sol-table-scroll {
    min-width: 100%;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background: var(--bg-tertiary);
}

.table th {
    padding: 16px 18px;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table td {
    padding: 16px 18px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-color);
}

.table tbody tr {
    transition: background-color 0.15s;
}

.table tbody tr:hover {
    background: var(--bg-secondary);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table td .btn {
    margin-right: 6px;
    margin-bottom: 4px;
}

/* Responsive */
@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .nav {
        flex-direction: column;
        gap: 15px;
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .table {
        min-width: 600px;
    }
    
    .filter-form {
        flex-direction: column;
    }
    
    .filter-form input,
    .filter-form select {
        width: 100%;
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}