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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1f2937;
    --gray: #6b7280;
    --light-gray: #f3f4f6;
    --border: #e5e7eb;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    background: var(--light-gray);
    color: var(--dark);
    line-height: 1.6;
}

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

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-box {
    background: var(--white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.logo {
    margin-bottom: 20px;
}

.login-box h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 30px;
}

.error-message {
    background: #fee;
    color: var(--danger);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.login-info {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--gray);
    text-align: left;
}

.login-info p {
    margin: 5px 0;
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--white);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo-section {
    padding: 30px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-section h2 {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    list-style: none;
    padding: 20px 0;
    flex: 1;
}

.nav-menu li {
    margin: 4px 12px;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--gray);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
    font-weight: 500;
}

.nav-menu a span {
    font-size: 20px;
}

.nav-menu a:hover {
    background: var(--light-gray);
    color: var(--dark);
}

.nav-menu li.active a {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
}

.user-info {
    padding: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

.user-details {
    flex: 1;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--dark);
}

.user-role {
    font-size: 12px;
    color: var(--gray);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 30px;
    max-width: 1400px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--dark);
}

.btn-secondary {
    padding: 10px 20px;
    background: var(--white);
    color: var(--dark);
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
    margin-left: 8px;
}

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
}

/* Links Container */
.links-container {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state svg {
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--gray);
    margin-bottom: 20px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.link-card {
    background: var(--light-gray);
    border-radius: 12px;
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.link-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.link-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 16px;
}

.link-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    flex: 1;
}

.link-actions {
    display: flex;
    gap: 8px;
}

.btn-icon {
    background: var(--white);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s;
}

.btn-icon:hover {
    transform: scale(1.1);
}

.link-url {
    margin-bottom: 12px;
}

.url-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray);
    display: block;
    margin-bottom: 4px;
}

.link-url a {
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
    word-break: break-all;
}

.link-url a:hover {
    text-decoration: underline;
}

.link-smart {
    margin-bottom: 12px;
}

.smart-link-box {
    display: flex;
    gap: 8px;
    background: var(--white);
    padding: 8px;
    border-radius: 8px;
}

.smart-link-box input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 13px;
    color: var(--dark);
    font-family: 'Courier New', monospace;
}

.smart-link-box input:focus {
    outline: none;
}

.btn-copy {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.btn-copy:hover {
    background: var(--primary-dark);
}

.link-stats {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--gray);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--gray);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--light-gray);
    color: var(--dark);
}

.modal-content form {
    padding: 24px;
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

.modal-footer .btn-secondary {
    margin: 0;
}

/* Analytics */
.export-buttons {
    display: flex;
    gap: 8px;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.analytics-card {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.analytics-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--dark);
}

.chart-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chart-bar {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chart-label {
    min-width: 80px;
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
}

.chart-progress {
    flex: 1;
    height: 24px;
    background: var(--light-gray);
    border-radius: 12px;
    overflow: hidden;
}

.chart-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    transition: width 0.3s;
}

.chart-value {
    min-width: 40px;
    text-align: right;
    font-weight: 600;
    color: var(--dark);
}

/* Traffic Table */
.traffic-table-container {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.traffic-table-container h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--dark);
}

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

.traffic-table th {
    background: var(--light-gray);
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    color: var(--dark);
}

.traffic-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    color: var(--gray);
}

.traffic-table tr:hover {
    background: var(--light-gray);
}

.referrer-cell {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }
    
    .main-content {
        margin-left: 0;
        padding: 20px;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .analytics-grid {
        grid-template-columns: 1fr;
    }
}