/* Base CSS with DeepSeek-inspired design system */
:root {
    --deepseek-primary: #0066ff;
    --deepseek-primary-dark: #0052cc;
    --deepseek-secondary: #f5f9ff;
    --deepseek-tertiary: #e8f0fe;
    --deepseek-text-primary: #222;
    --deepseek-text-secondary: #555;
    --deepseek-success: #34c759;
    --deepseek-warning: #ff9500;
    --deepseek-danger: #ff3b30;
    --deepseek-border: #e1e5eb;
    --deepseek-shadow: rgba(0, 102, 255, 0.1);
    --deepseek-shadow-heavy: rgba(0, 102, 255, 0.2);
    --deepseek-background: #fafafa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--deepseek-background);
    color: var(--deepseek-text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--deepseek-text-primary);
    margin-top: 0;
}

h1 {
    font-size: 32px;
    line-height: 1.2;
}

h2 {
    font-size: 26px;
    line-height: 1.3;
}

h3 {
    font-size: 22px;
    line-height: 1.4;
}

p, li, td, th, input, select, textarea {
    color: var(--deepseek-text-secondary);
    font-size: 16px;
}

a {
    color: var(--deepseek-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--deepseek-primary-dark);
    text-decoration: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: white;
    box-shadow: 0 2px 8px var(--deepseek-shadow);
    padding: 15px 0;
}

.navbar-brand {
    font-size: 22px;
    font-weight: 700;
    color: var(--deepseek-primary) !important;
}

.navbar-nav .nav-link {
    color: var(--deepseek-text-secondary);
    font-weight: 500;
    padding: 12px 16px;
    margin: 0 2px;
    border-radius: 8px;
    transition: all 0.2s;
}

.navbar-nav .nav-link:hover, 
.navbar-nav .nav-link.active {
    background-color: var(--deepseek-secondary);
    color: var(--deepseek-primary);
}

/* Cards */
.card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--deepseek-shadow);
    overflow: hidden;
    border: 1px solid var(--deepseek-border);
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--deepseek-shadow-heavy);
}

.card-header {
    background-color: white;
    border-bottom: 1px solid var(--deepseek-border);
    padding: 16px 20px;
}

.card-body {
    padding: 20px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--deepseek-text-primary);
    margin-bottom: 10px;
}

.card-text {
    color: var(--deepseek-text-secondary);
    margin-bottom: 15px;
}

.card-footer {
    background-color: var(--deepseek-secondary);
    border-top: 1px solid var(--deepseek-border);
    padding: 14px 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    vertical-align: middle;
    user-select: none;
    padding: 10px 16px;
    border-radius: 8px;
    transition: all 0.2s;
    border: none;
    font-size: 16px;
    cursor: pointer;
}

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

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

.btn-outline-primary {
    background-color: transparent;
    border: 1px solid var(--deepseek-primary);
    color: var(--deepseek-primary);
}

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

.btn-secondary {
    background-color: #718096;
    color: white;
}

.btn-secondary:hover {
    background-color: #4a5568;
    color: white;
}

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

.btn-success:hover {
    background-color: #2aa148;
    color: white;
}

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

.btn-danger:hover {
    background-color: #cc2a21;
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 14px;
}

.btn-lg {
    padding: 12px 20px;
    font-size: 18px;
}

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

.form-control {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    line-height: 1.5;
    color: var(--deepseek-text-primary);
    background-color: #fff;
    border: 1px solid var(--deepseek-border);
    border-radius: 8px;
    transition: all 0.2s;
}

.form-control:focus {
    border-color: var(--deepseek-primary);
    outline: 0;
    box-shadow: 0 0 0 3px var(--deepseek-shadow);
}

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

/* Table */
.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-bottom: 20px;
}

.table th,
.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--deepseek-border);
}

.table thead th {
    background-color: var(--deepseek-secondary);
    font-weight: 600;
    color: var(--deepseek-text-primary);
    border-bottom: 2px solid var(--deepseek-primary);
}

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

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 102, 255, 0.025);
}

/* Alerts */
.alert {
    padding: 16px;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px solid transparent;
}

.alert-primary {
    background-color: var(--deepseek-tertiary);
    border-color: var(--deepseek-primary);
    color: var(--deepseek-primary-dark);
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeeba;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 5px 10px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
}

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

.badge-secondary {
    background-color: #718096;
    color: white;
}

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

.badge-warning {
    background-color: var(--deepseek-warning);
    color: white;
}

.badge-danger {
    background-color: var(--deepseek-danger);
    color: white;
}

/* Utilities */
.text-primary { color: var(--deepseek-primary) !important; }
.text-success { color: var(--deepseek-success) !important; }
.text-warning { color: var(--deepseek-warning) !important; }
.text-danger { color: var(--deepseek-danger) !important; }
.text-muted { color: #8898aa !important; }

.bg-primary { background-color: var(--deepseek-primary) !important; }
.bg-secondary { background-color: var(--deepseek-secondary) !important; }
.bg-tertiary { background-color: var(--deepseek-tertiary) !important; }
.bg-success { background-color: var(--deepseek-success) !important; }
.bg-warning { background-color: var(--deepseek-warning) !important; }
.bg-danger { background-color: var(--deepseek-danger) !important; }

.shadow-sm { box-shadow: 0 2px 4px var(--deepseek-shadow) !important; }
.shadow { box-shadow: 0 4px 12px var(--deepseek-shadow) !important; }
.shadow-lg { box-shadow: 0 8px 20px var(--deepseek-shadow-heavy) !important; }

.rounded-sm { border-radius: 4px !important; }
.rounded { border-radius: 8px !important; }
.rounded-lg { border-radius: 12px !important; }
.rounded-circle { border-radius: 50% !important; }

.border { border: 1px solid var(--deepseek-border) !important; }
.border-top { border-top: 1px solid var(--deepseek-border) !important; }
.border-right { border-right: 1px solid var(--deepseek-border) !important; }
.border-bottom { border-bottom: 1px solid var(--deepseek-border) !important; }
.border-left { border-left: 1px solid var(--deepseek-border) !important; }

/* Spacing */
.m-1 { margin: 0.25rem !important; }
.m-2 { margin: 0.5rem !important; }
.m-3 { margin: 1rem !important; }
.m-4 { margin: 1.5rem !important; }
.m-5 { margin: 3rem !important; }

.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.ml-1 { margin-left: 0.25rem !important; }
.ml-2 { margin-left: 0.5rem !important; }
.ml-3 { margin-left: 1rem !important; }
.ml-4 { margin-left: 1.5rem !important; }
.ml-5 { margin-left: 3rem !important; }

.mr-1 { margin-right: 0.25rem !important; }
.mr-2 { margin-right: 0.5rem !important; }
.mr-3 { margin-right: 1rem !important; }
.mr-4 { margin-right: 1.5rem !important; }
.mr-5 { margin-right: 3rem !important; }

.p-1 { padding: 0.25rem !important; }
.p-2 { padding: 0.5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }
.p-5 { padding: 3rem !important; }

.pt-1 { padding-top: 0.25rem !important; }
.pt-2 { padding-top: 0.5rem !important; }
.pt-3 { padding-top: 1rem !important; }
.pt-4 { padding-top: 1.5rem !important; }
.pt-5 { padding-top: 3rem !important; }

.pb-1 { padding-bottom: 0.25rem !important; }
.pb-2 { padding-bottom: 0.5rem !important; }
.pb-3 { padding-bottom: 1rem !important; }
.pb-4 { padding-bottom: 1.5rem !important; }
.pb-5 { padding-bottom: 3rem !important; }

.pl-1 { padding-left: 0.25rem !important; }
.pl-2 { padding-left: 0.5rem !important; }
.pl-3 { padding-left: 1rem !important; }
.pl-4 { padding-left: 1.5rem !important; }
.pl-5 { padding-left: 3rem !important; }

.pr-1 { padding-right: 0.25rem !important; }
.pr-2 { padding-right: 0.5rem !important; }
.pr-3 { padding-right: 1rem !important; }
.pr-4 { padding-right: 1.5rem !important; }
.pr-5 { padding-right: 3rem !important; }

/* Flex */
.d-flex { display: flex !important; }
.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.justify-content-start { justify-content: flex-start !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-around { justify-content: space-around !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }
.align-items-center { align-items: center !important; }
.align-items-baseline { align-items: baseline !important; }
.align-items-stretch { align-items: stretch !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-nowrap { flex-wrap: nowrap !important; }
.flex-grow-1 { flex-grow: 1 !important; }

/* Grid */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -15px;
    margin-left: -15px;
}

.col {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    flex-basis: 0;
    flex-grow: 1;
    max-width: 100%;
}

/* Footer */
.footer {
    background-color: white;
    padding: 40px 0;
    margin-top: 40px;
    border-top: 1px solid var(--deepseek-border);
}

/* Animation */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    h1 {
        font-size: 28px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .card {
        margin-bottom: 16px;
    }
    
    .navbar-brand {
        font-size: 20px;
    }
    
    .btn {
        padding: 8px 14px;
        font-size: 14px;
    }
}