/* Custom styles for measurement tools */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

.tool-card {
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-2px);
}

/* Form styling */
input[type="number"]:focus {
    box-shadow: 0 0 0 3px rgba(66, 66, 66, 0.1);
}

/* Result animation */
.result-card {
    animation: fadeInUp 0.5s ease-out;
}

.card {
    border-radius: 0.5rem;
    border-width: 1px;
    --tw-border-opacity: 1;
    border-color: rgb(238 238 238 / var(--tw-border-opacity, 1));
    --tw-bg-opacity: 1;
    background-color: rgb(255 255 255 / var(--tw-bg-opacity, 1));
    --tw-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --tw-shadow-colored: 0 1px 2px 0 var(--tw-shadow-color);
    box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive improvements */
@media (max-width: 640px) {
    .text-4xl {
        font-size: 2.25rem;
    }
    
    .text-3xl {
        font-size: 1.875rem;
    }
}

/* Loading state */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Print styles */
@media print {
    nav, footer {
        display: none;
    }
    
    .bg-gray-50 {
        background: white !important;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.glass-effect {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}
.grade-A-plus { background: linear-gradient(135deg, #10b981, #059669); }
.grade-A { background: linear-gradient(135deg, #34d399, #10b981); }
.grade-B { background: linear-gradient(135deg, #f59e0b, #d97706); }
.grade-C { background: linear-gradient(135deg, #ef4444, #dc2626); }
.score-ring {
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1.5s ease-in-out;
}
.progress-gradient {
    background: linear-gradient(90deg, #ef4444 0%, #f59e0b 30%, #10b981 70%, #10b981 100%);
    transition: all 1.5s ease-in-out;
}
.article-content h2 {
    border-left: 4px solid #3b82f6;
    padding-left: 1rem;
    margin: 2.5rem 0 1.5rem 0;
}

.article-content h3 {
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.article-content p {
    margin-bottom: 1.5rem;
}

.highlight-box {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border-left: 4px solid #0ea5e9;
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
    margin: 2rem 0;
}

.step-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.keyword {
    background: #dbeafe;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    color: #1e40af;
}

blockquote {
    border-left: 4px solid #10b981;
    background: #f0fdf4;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
}