:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
}

/* Login Page Styles */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 48px 32px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-section {
    text-align: center;
    margin-bottom: 32px;
}

.logo-section h1 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form {
    margin-bottom: 24px;
}

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

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

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

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn-primary,
.btn-secondary {
    width: 100%;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

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

.btn-primary:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 8px 16px;
    width: auto;
}

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

.error-message {
    padding: 12px;
    margin-bottom: 16px;
    background-color: #fee2e2;
    color: var(--danger-color);
    border-radius: 8px;
    font-size: 14px;
    border-left: 4px solid var(--danger-color);
}

.footer-text {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.footer-text p {
    color: var(--text-secondary);
    font-size: 13px;
}

/* App Page Styles */
.app-page {
    background-color: var(--bg-color);
}

.navbar {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h2 {
    font-size: 20px;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    color: var(--text-secondary);
    font-size: 14px;
    padding: 8px 16px;
    background-color: var(--bg-color);
    border-radius: 6px;
}

.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

.container {
    width: 100%;
}

.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.lead {
    font-size: 18px;
    color: var(--text-secondary);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background-color: var(--surface-color);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.full-width {
    grid-column: 1 / -1;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-color);
}

.card-header h3 {
    font-size: 18px;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.projects-list {
    min-height: 150px;
}

.project-item {
    padding: 16px;
    margin-bottom: 12px;
    background-color: var(--bg-color);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.project-item h4 {
    color: var(--text-primary);
    margin-bottom: 4px;
}

.project-item p {
    color: var(--text-secondary);
    font-size: 14px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-item {
    text-align: center;
    padding: 16px;
    background-color: var(--bg-color);
    border-radius: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.documents-list {
    min-height: 100px;
}

.info-text {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.info-item {
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-item strong {
    color: var(--text-secondary);
    font-size: 14px;
}

.info-item span {
    color: var(--text-primary);
    font-size: 16px;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: #d1fae5;
    color: var(--success-color);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
}

.footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
    padding: 24px;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }

    .nav-menu {
        width: 100%;
        justify-content: space-between;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 28px;
    }
}