/**
 * Agriculture Novel Nutrient Calculator - Modern AI-Like UI/UX
 * Clean, animated, GPT-inspired design
 */

/* Modern CSS Variables */
:root {
    /* AI-Inspired Color Palette */
    --ai-primary: #10B981;
    --ai-primary-dark: #059669;
    --ai-primary-light: #34D399;
    --ai-secondary: #3B82F6;
    --ai-accent: #8B5CF6;
    --ai-success: #22C55E;
    --ai-warning: #F59E0B;
    --ai-error: #EF4444;
    
    /* Neutral Grays */
    --ai-gray-50: #FAFAFA;
    --ai-gray-100: #F4F4F5;
    --ai-gray-200: #E4E4E7;
    --ai-gray-300: #D4D4D8;
    --ai-gray-400: #A1A1AA;
    --ai-gray-500: #71717A;
    --ai-gray-600: #52525B;
    --ai-gray-700: #3F3F46;
    --ai-gray-800: #27272A;
    --ai-gray-900: #18181B;
    
    /* Glass Morphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    
    /* Modern Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Modern Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Smooth Transitions */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

/* Base Calculator Styles */
.annc-calculator {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 2rem 0;
    position: relative;
    overflow-x: hidden;
}

.annc-calculator::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="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
}

.annc-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
    z-index: 1;
}

/* Modern Header */
.annc-header {
    text-align: center;
    margin-bottom: 3rem;
    animation: slideInDown 0.8s ease-out;
}

.annc-header-content {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 3rem 2rem;
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

.annc-header-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 3s infinite;
}

.annc-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 1rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.annc-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin: 0 0 1.5rem 0;
    font-weight: 400;
}

.annc-header-badges {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.annc-badge {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition-normal);
}

.annc-badge:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* Main Content Layout */
.annc-main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

/* Modern Card Design */
.annc-section {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition-normal);
    animation: slideInUp 0.6s ease-out;
}

.annc-section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.annc-section-header {
    background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-primary-dark) 100%);
    color: white;
    padding: 1.5rem 2rem;
    position: relative;
    overflow: hidden;
}

.annc-section-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    pointer-events: none;
}

.annc-section-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    position: relative;
    z-index: 1;
}

.annc-section-content {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.95);
}

/* Modern Form Controls */
.annc-form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.annc-form-group label {
    display: block;
    font-weight: 600;
    color: var(--ai-gray-700);
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition-fast);
}

.annc-input, .annc-select {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--ai-gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    transition: var(--transition-normal);
    background: white;
    color: var(--ai-gray-800);
    font-weight: 500;
    position: relative;
}

.annc-input:focus, .annc-select:focus {
    outline: none;
    border-color: var(--ai-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
    transform: translateY(-2px);
}

.annc-input[type="number"] {
    text-align: right;
    font-family: var(--font-mono);
    font-weight: 600;
}

/* Modern Dropdown Styling */
.annc-select {
    appearance: none;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="%23666"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/></svg>');
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 3rem;
}

.annc-select option {
    background: white;
    color: var(--ai-gray-800);
    padding: 0.75rem;
}

/* PPM Grid with Modern Cards */
.annc-ppm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.annc-form-group.ppm-group {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: var(--transition-normal);
}

.annc-form-group.ppm-group:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--ai-primary);
}

.annc-form-group.ppm-group label {
    color: var(--ai-gray-600);
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
}

.annc-form-group.ppm-group .annc-input {
    border: none;
    background: white;
    box-shadow: var(--shadow-sm);
}

.annc-unit {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--ai-gray-500);
    pointer-events: none;
    font-weight: 600;
    background: var(--ai-gray-100);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

/* Modern Buttons */
.annc-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.annc-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.annc-btn:hover::before {
    left: 100%;
}

.annc-btn-primary {
    background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-lg);
}

.annc-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.annc-btn-secondary {
    background: linear-gradient(135deg, var(--ai-secondary) 0%, #2563eb 100%);
    color: white;
    box-shadow: var(--shadow-lg);
}

.annc-btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.annc-btn-outline {
    background: transparent;
    color: var(--ai-gray-600);
    border: 2px solid var(--ai-gray-300);
}

.annc-btn-outline:hover {
    background: var(--ai-gray-50);
    border-color: var(--ai-gray-400);
    transform: translateY(-2px);
}

.annc-btn-large {
    padding: 1.5rem 3rem;
    font-size: 1rem;
    width: 100%;
    justify-content: center;
    border-radius: var(--radius-xl);
}

.annc-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Crop Info Card with Modern Design */
.annc-info-card {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-top: 1.5rem;
    position: relative;
    overflow: hidden;
    animation: slideInUp 0.6s ease-out;
}

.annc-info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--ai-primary), var(--ai-secondary));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.annc-info-card h4 {
    margin: 0 0 1.5rem 0;
    color: var(--ai-gray-800);
    font-weight: 700;
    font-size: 1.125rem;
}

.annc-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.annc-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-md);
    border: 1px solid var(--ai-gray-200);
    transition: var(--transition-fast);
}

.annc-info-item:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}

.annc-info-label {
    color: var(--ai-gray-600);
    font-weight: 500;
}

.annc-info-value {
    font-weight: 700;
    color: var(--ai-primary);
    font-family: var(--font-mono);
}

.annc-crop-description {
    font-size: 0.875rem;
    color: var(--ai-gray-600);
    margin: 0;
    font-style: italic;
    line-height: 1.6;
    background: rgba(255, 255, 255, 0.7);
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--ai-primary);
}

/* Loading Animation */
.annc-loading {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--ai-gray-600);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--glass-border);
}

.annc-spinner {
    width: 4rem;
    height: 4rem;
    border: 4px solid var(--ai-gray-200);
    border-top: 4px solid var(--ai-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

.annc-loading p {
    font-size: 1.125rem;
    font-weight: 500;
    margin: 0;
    color: var(--ai-gray-700);
}

/* Results Display */
.annc-results {
    animation: slideInUp 0.8s ease-out;
}

.annc-salt-list {
    margin-bottom: 2rem;
}

.annc-salt-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.9) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    border: 1px solid var(--ai-gray-200);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.annc-salt-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--ai-primary), var(--ai-secondary));
}

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

.annc-salt-name {
    font-weight: 700;
    color: var(--ai-gray-800);
    font-size: 1rem;
}

.annc-salt-formula {
    font-size: 0.75rem;
    color: var(--ai-gray-500);
    font-family: var(--font-mono);
    background: var(--ai-gray-100);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    margin-top: 0.25rem;
}

.annc-salt-weight {
    font-weight: 700;
    color: var(--ai-primary);
    font-size: 1.125rem;
    font-family: var(--font-mono);
}

.annc-total-weight {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-primary-dark) 100%);
    color: white;
    border-radius: var(--radius-xl);
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

/* Mixing Instructions */
.annc-instructions {
    counter-reset: instruction-counter;
    padding-left: 0;
    list-style: none;
}

.annc-instructions li {
    counter-increment: instruction-counter;
    padding: 1.5rem 0 1.5rem 4rem;
    border-bottom: 1px solid var(--ai-gray-200);
    position: relative;
    line-height: 1.6;
    transition: var(--transition-fast);
}

.annc-instructions li:last-child {
    border-bottom: none;
}

.annc-instructions li:before {
    content: counter(instruction-counter);
    position: absolute;
    left: 0;
    top: 1.5rem;
    background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-primary-dark) 100%);
    color: white;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.annc-instructions li:hover {
    background: rgba(16, 185, 129, 0.05);
    border-radius: var(--radius-md);
    padding-left: 1rem;
    margin-left: -1rem;
}

/* Error States */
.annc-error {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.annc-error-content {
    background: rgba(239, 68, 68, 0.05);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.annc-error-content h4 {
    margin: 1rem 0 0.75rem 0;
    color: var(--ai-error);
    font-weight: 600;
}

.annc-error-content p {
    margin: 0 0 1.5rem 0;
    color: var(--ai-gray-600);
}

/* Animations */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .annc-main-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .annc-title {
        font-size: 2rem;
    }
    
    .annc-ppm-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 768px) {
    .annc-container {
        padding: 0 0.75rem;
    }
    
    .annc-header-content {
        padding: 2rem 1rem;
    }
    
    .annc-title {
        font-size: 1.75rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .annc-section-content {
        padding: 1.5rem;
    }
    
    .annc-ppm-grid {
        grid-template-columns: 1fr;
    }
    
    .annc-info-grid {
        grid-template-columns: 1fr;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --ai-gray-50: #18181B;
        --ai-gray-100: #27272A;
        --ai-gray-200: #3F3F46;
        --ai-gray-300: #52525B;
        --ai-gray-400: #71717A;
        --ai-gray-500: #A1A1AA;
        --ai-gray-600: #D4D4D8;
        --ai-gray-700: #E4E4E7;
        --ai-gray-800: #F4F4F5;
        --ai-gray-900: #FAFAFA;
    }
    
    .annc-section-content {
        background: rgba(24, 24, 27, 0.95);
    }
    
    .annc-input, .annc-select {
        background: rgba(39, 39, 42, 0.8);
        border-color: var(--ai-gray-300);
        color: var(--ai-gray-800);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
.annc-btn:focus,
.annc-input:focus,
.annc-select:focus {
    outline: 2px solid var(--ai-primary);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --ai-primary: #0000FF;
        --ai-secondary: #FF8000;
        --ai-error: #FF0000;
    }
    
    .annc-section {
        border: 2px solid var(--ai-gray-300);
    }
    
    .annc-btn {
        border: 2px solid currentColor;
    }
}