/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Root Variables */
:root {
    --primary-color: #3b82f6;
    --secondary-color: #1e293b;
    --accent-color: #0ea5e9;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

/* Card Styles */
.card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(71, 85, 105, 0.5);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(71, 85, 105, 0.3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #f1f5f9;
}

.card-body {
    padding: 1.5rem;
}

.result-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(14, 165, 233, 0.1));
    border: 2px solid rgba(59, 130, 246, 0.3);
}

.result-card:hover {
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.2);
}

/* Form Styles */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #cbd5e1;
    display: block;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(71, 85, 105, 0.5);
    border-radius: 0.5rem;
    color: #f1f5f9;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    font-family: inherit;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    background: rgba(15, 23, 42, 0.8);
}

.form-input::placeholder {
    color: #64748b;
}

.form-input:hover,
.form-select:hover {
    border-color: rgba(71, 85, 105, 0.7);
}

/* Checkbox Styles */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.875rem;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(71, 85, 105, 0.3);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    color: #cbd5e1;
}

.checkbox-label:hover {
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(59, 130, 246, 0.4);
}

.form-checkbox {
    width: 1.125rem;
    height: 1.125rem;
    border-radius: 0.25rem;
    border: 2px solid rgba(71, 85, 105, 0.5);
    background: rgba(15, 23, 42, 0.6);
    cursor: pointer;
    transition: all 0.2s ease;
    accent-color: var(--primary-color);
}

.form-checkbox:checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

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

.btn-secondary {
    background: rgba(71, 85, 105, 0.5);
    color: #f1f5f9;
    border: 1px solid rgba(71, 85, 105, 0.7);
}

.btn-secondary:hover {
    background: rgba(71, 85, 105, 0.7);
    border-color: rgba(71, 85, 105, 0.9);
}

/* Score Bar Styles */
.score-bar {
    width: 100%;
    height: 0.5rem;
    background: rgba(15, 23, 42, 0.6);
    border-radius: 0.25rem;
    overflow: hidden;
}

.score-bar-fill {
    height: 100%;
    transition: width 0.6s ease;
    border-radius: 0.25rem;
}

/* Confidence Badge */
.confidence-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.confidence-high {
    background: rgba(16, 185, 129, 0.2);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.confidence-moderate {
    background: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.confidence-low {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    padding: 1rem;
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border: 1px solid rgba(71, 85, 105, 0.5);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 48rem;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.5);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: rgba(71, 85, 105, 0.7);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(71, 85, 105, 0.9);
}

/* Utility Classes */
.col-span-full {
    grid-column: 1 / -1;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .card {
        border: 1px solid #ddd;
        background: white;
        page-break-inside: avoid;
    }
    
    .btn,
    .modal {
        display: none;
    }
    
    .card-header {
        background: #f5f5f5;
        border-bottom: 1px solid #ddd;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .checkbox-grid {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .modal-content {
        padding: 1.5rem;
    }
}

@media (max-width: 640px) {
    .card-title {
        font-size: 1.125rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.8125rem;
    }
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Focus Visible */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: rgba(59, 130, 246, 0.3);
    color: white;
}

/* Smooth Transitions */
* {
    transition-property: background-color, border-color, color, fill, stroke;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

/* Custom Number Input */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

/* Disabled State */
.form-input:disabled,
.form-select:disabled,
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.field-disabled {
    opacity: 0.4;
    pointer-events: none;
    user-select: none;
}

.field-disabled .checkbox-label {
    cursor: not-allowed;
}

/* Empty State */
.empty-state {
    padding: 3rem 2rem;
    text-align: center;
    color: #64748b;
}

.empty-state svg {
    width: 3rem;
    height: 3rem;
    margin: 0 auto 1rem;
    color: #475569;
}

/* Alert Styles */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: start;
    gap: 0.75rem;
}

.alert-info {
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.3);
    color: #0ea5e9;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, #3b82f6, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Glass Effect */
.glass {
    background: rgba(30, 41, 59, 0.4);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Pulse Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}