/* Google Material Design Theme for LinkGen AI */

:root {
    /* Material Design Core Colors */
    --md-primary: #0096FF;
    --md-primary-light: #66B3FF;
    --md-primary-dark: #0077E6;
    --md-secondary: #455A64;
    --md-secondary-light: #718792;
    --md-secondary-dark: #1C313A;
    
    /* Material Design Surface Colors */
    --md-surface: #FFFFFF;
    --md-background: #F5F5F5;
    --md-error: #F44336;
    --md-warning: #FF9800;
    --md-success: #4CAF50;
    --md-info: #2196F3;
    
    /* Material Design Text Colors */
    --md-text-primary: rgba(0, 0, 0, 0.87);
    --md-text-secondary: rgba(0, 0, 0, 0.60);
    --md-text-disabled: rgba(0, 0, 0, 0.38);
    --md-text-hint: rgba(0, 0, 0, 0.38);
    
    /* Material Design Elevation Shadows */
    --md-shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --md-shadow-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --md-shadow-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --md-shadow-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    --md-shadow-5: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);
    
    /* Material Design Border Radius */
    --md-border-radius: 4px;
    --md-border-radius-lg: 8px;
    --md-border-radius-xl: 12px;
    
    /* Transitions */
    --md-transition-fast: 0.15s cubic-bezier(0.4, 0.0, 0.2, 1);
    --md-transition-normal: 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    --md-transition-slow: 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* Global Material Design Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--md-background);
    color: var(--md-text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Material Design Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 400;
    line-height: 1.2;
    color: var(--md-text-primary);
}

h1 { font-size: 2.125rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

/* Material Design Buttons */
.btn {
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.0892857143em;
    border-radius: var(--md-border-radius);
    transition: all var(--md-transition-fast);
    box-shadow: var(--md-shadow-1);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active:before {
    width: 300px;
    height: 300px;
}

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

.btn-primary:hover {
    background-color: var(--md-primary-dark);
    box-shadow: var(--md-shadow-2);
    transform: translateY(-1px);
}

.btn-outline-primary {
    background-color: transparent;
    color: var(--md-primary);
    border: 2px solid var(--md-primary);
    box-shadow: none;
}

.btn-outline-primary:hover {
    background-color: var(--md-primary);
    color: white;
    box-shadow: var(--md-shadow-1);
}

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

.btn-success:hover {
    background-color: #388E3C;
    box-shadow: var(--md-shadow-2);
}

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

.btn-warning:hover {
    background-color: #F57C00;
    box-shadow: var(--md-shadow-2);
}

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

.btn-danger:hover {
    background-color: #D32F2F;
    box-shadow: var(--md-shadow-2);
}

/* Material Design Cards */
.card {
    background-color: var(--md-surface);
    border: none;
    border-radius: var(--md-border-radius-lg);
    box-shadow: var(--md-shadow-1);
    transition: all var(--md-transition-normal);
}

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

.card-header {
    background-color: var(--md-surface);
    border-bottom: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--md-border-radius-lg) var(--md-border-radius-lg) 0 0;
    padding: 1rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Material Design Form Controls */
.form-control, .form-select {
    background-color: var(--md-surface);
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--md-border-radius);
    color: var(--md-text-primary);
    font-size: 1rem;
    line-height: 1.5;
    padding: 0.75rem 1rem;
    transition: all var(--md-transition-fast);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.form-control:focus, .form-select:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 3px rgba(0, 150, 255, 0.2);
    outline: none;
}

.form-label {
    color: var(--md-text-secondary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

/* Material Design Navigation */
.navbar {
    background-color: var(--md-primary);
    box-shadow: var(--md-shadow-2);
    padding: 0.5rem 0;
}

.navbar-brand {
    color: white !important;
    font-weight: 500;
    font-size: 1.25rem;
}

.navbar-text {
    color: rgba(255, 255, 255, 0.87) !important;
}

/* Material Design Tabs */
.nav-tabs {
    border-bottom: none;
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius-lg);
    padding: 0.25rem;
    box-shadow: var(--md-shadow-1);
    margin-bottom: 1rem;
}

.nav-tabs .nav-link {
    border: none;
    border-radius: var(--md-border-radius);
    color: var(--md-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.0892857143em;
    padding: 0.75rem 1.5rem;
    transition: all var(--md-transition-fast);
    margin: 0 0.25rem;
}

.nav-tabs .nav-link:hover {
    background-color: rgba(0, 150, 255, 0.08);
    color: var(--md-primary);
}

.nav-tabs .nav-link.active {
    background-color: var(--md-primary);
    color: white;
    box-shadow: var(--md-shadow-1);
}

/* Material Design Alerts */
.alert {
    border: none;
    border-radius: var(--md-border-radius);
    border-left: 4px solid;
    color: var(--md-text-primary);
    padding: 1rem 1.5rem;
    box-shadow: var(--md-shadow-1);
}

.alert-info {
    background-color: #E3F2FD;
    border-left-color: var(--md-info);
    color: #0D47A1;
}

.alert-success {
    background-color: #E8F5E8;
    border-left-color: var(--md-success);
    color: #1B5E20;
}

.alert-warning {
    background-color: #FFF3E0;
    border-left-color: var(--md-warning);
    color: #E65100;
}

.alert-danger {
    background-color: #FFEBEE;
    border-left-color: var(--md-error);
    color: #B71C1C;
}

/* Material Design Progress */
.progress {
    background-color: rgba(0, 0, 0, 0.12);
    border-radius: var(--md-border-radius);
    height: 0.5rem;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    background-color: var(--md-primary);
    border-radius: var(--md-border-radius);
    transition: width var(--md-transition-normal);
}

/* Material Design Badges */
.badge {
    border-radius: var(--md-border-radius);
    font-weight: 500;
    letter-spacing: 0.025em;
    padding: 0.375rem 0.75rem;
}

.bg-primary {
    background-color: var(--md-primary) !important;
}

.bg-success {
    background-color: var(--md-success) !important;
}

.bg-warning {
    background-color: var(--md-warning) !important;
    color: var(--md-text-primary) !important;
}

.bg-danger {
    background-color: var(--md-error) !important;
}

.bg-info {
    background-color: var(--md-info) !important;
}

.bg-secondary {
    background-color: var(--md-secondary) !important;
}

/* Material Design Footer */
footer {
    background-color: var(--md-secondary);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Material Design Hero Section */
.gradient-bg {
    background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.gradient-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="50" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="30" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

/* Material Design URL Items */
.url-item {
    background-color: var(--md-surface);
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--md-border-radius-lg);
    padding: 1rem 1.5rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--md-shadow-1);
    transition: all var(--md-transition-fast);
}

.url-item:hover {
    border-color: var(--md-primary);
    box-shadow: var(--md-shadow-2);
    transform: translateY(-1px);
}

/* Material Design Progress Container */
.progress-container {
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius-xl);
    padding: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.12);
    box-shadow: var(--md-shadow-1);
}

/* Material Design Network Container */
.network-container {
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius-xl);
    padding: 1.5rem;
    min-height: 500px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    box-shadow: var(--md-shadow-1);
}

/* Material Design Recommendation Cards */
.recommendation-card {
    border-left: 4px solid var(--md-primary);
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius-lg);
    box-shadow: var(--md-shadow-1);
    transition: all var(--md-transition-fast);
    margin-bottom: 1rem;
}

.recommendation-card:hover {
    transform: translateX(4px);
    box-shadow: var(--md-shadow-2);
}

.similarity-high { 
    border-left-color: var(--md-success);
    background-color: #E8F5E8;
}

.similarity-medium { 
    border-left-color: var(--md-warning);
    background-color: #FFF3E0;
}

.similarity-low { 
    border-left-color: var(--md-error);
    background-color: #FFEBEE;
}

/* Material Design Statistics Cards */
.stats-card {
    background-color: var(--md-surface);
    border-radius: var(--md-border-radius-lg);
    padding: 1.5rem;
    border: 1px solid rgba(0, 0, 0, 0.12);
    box-shadow: var(--md-shadow-1);
    transition: all var(--md-transition-fast);
    text-align: center;
}

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

.stats-card .card-title {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--md-primary);
}

/* Material Design Loading States */
.loading-spinner {
    display: none;
}

.btn.loading {
    position: relative;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Material Design Status Badge */
.status-badge {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.025em;
    padding: 0.25rem 0.5rem;
    border-radius: var(--md-border-radius);
}

/* Material Design Animations */
.fade-in {
    animation: fadeIn var(--md-transition-normal) ease-out;
}

.slide-in {
    animation: slideIn var(--md-transition-fast) ease-out;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(16px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes slideIn {
    from { 
        opacity: 0; 
        transform: translateX(-16px); 
    }
    to { 
        opacity: 1; 
        transform: translateX(0); 
    }
}

/* Material Design Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-light) 100%) 1;
}

/* Material Design Focus States */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 150, 255, 0.2);
}

/* Material Design Code Blocks */
code {
    background-color: rgba(0, 0, 0, 0.06);
    color: var(--md-text-primary);
    padding: 0.2rem 0.4rem;
    border-radius: var(--md-border-radius);
    font-size: 0.875rem;
}

/* Material Design Links */
a {
    color: var(--md-primary);
    text-decoration: none;
    transition: color var(--md-transition-fast);
}

a:hover {
    color: var(--md-primary-dark);
    text-decoration: underline;
}

/* Material Design Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--md-background);
}

::-webkit-scrollbar-thumb {
    background: var(--md-secondary);
    border-radius: var(--md-border-radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--md-secondary-dark);
}

/* Material Design Toast Notifications */
.toast-container {
    z-index: 1050;
}

.toast {
    background-color: var(--md-surface);
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--md-border-radius-lg);
    box-shadow: var(--md-shadow-3);
    backdrop-filter: blur(10px);
}

.toast-header {
    background-color: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.12);
}

/* Material Design Responsive Adjustments */
@media (max-width: 768px) {
    .gradient-bg h1 {
        font-size: 1.75rem;
    }
    
    .stats-card .card-title {
        font-size: 1.5rem;
    }
    
    .network-container {
        min-height: 300px;
        padding: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .nav-tabs .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* Material Design Print Styles */
@media print {
    .navbar,
    .btn,
    .nav-tabs,
    footer,
    .loading-spinner {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
        break-inside: avoid;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}