/* style.css
  This file adds responsive refinements to the existing Tailwind CSS structure.
  It is designed to be linked from the main HTML file.
*/

/* --- Global Styles & Typography --- */
body {
    background-color: #f1f5f9;
    color: #1e293b;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

.hero-bg {
    background-color: #0f172a;
    background-image: radial-gradient(#597497 1px, transparent 1px);
    background-size: 20px 20px;
}
.hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(#334155 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.3; /* control visibility */
}

/* --- Mobile First Refinements (for screens smaller than 640px) --- */
@media (max-width: 640px) {
    /* Adjust hero section typography for small screens */
    .hero-bg h2 {
        font-size: 2.25rem; /* Equivalent to text-4xl */
        line-height: 2.5rem;
    }

    .hero-bg p {
        font-size: 1rem; /* Equivalent to text-base */
    }

    /* Adjust section header typography */
    section h3 {
        font-size: 1.875rem; /* Equivalent to text-3xl */
        line-height: 2.25rem;
    }

    /* Reduce vertical padding on sections to make content more compact */
    section {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }

    /* Make tab navigation wrap and center on small screens to prevent overflow */
    nav[aria-label="Tabs"] {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    /* Reduce the height of the 3D viewer on mobile */
    #mol_viewer_container {
        height: 400px;
    }

    /* Adjust chart heights for better fit on mobile */
    .chart-container {
        height: 300px;
    }
}

/* --- Tablet Refinements (for screens between 640px and 768px) --- */
@media (min-width: 641px) and (max-width: 768px) {
    /* Slightly reduce hero heading size for tablets */
    .hero-bg h2 {
        font-size: 3rem; /* Equivalent to text-5xl */
        line-height: 1;
    }
    
    /* Adjust 3D viewer height for tablets */
    #mol_viewer_container {
        height: 450px;
    }
}

/* --- General Interactive & UI Element Styles --- */
.phase-card {
    background-color: white;
    border-radius: 0.75rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    display: flex;
    flex-direction: column;
}
.phase-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}
.phase-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
}
.gemini-btn {
    margin-top: auto;
    padding-top: 0.75rem;
    border-top: 1px solid #f1f5f9;
    background: none;
    border: none;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 500;
    color: #0ea5e9;
    cursor: pointer;
    transition: color 0.2s;
}
.gemini-btn:hover {
    color: #0284c7;
}
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}
.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}
.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    transform: scale(0.95);
    transition: transform 0.3s;
}
.modal-overlay.visible .modal-content {
    transform: scale(1);
}
.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.tab-btn {
    transition: all 0.2s ease-in-out;
}
.tab-btn.active {
    color: #3b82f6;
    border-bottom-color: #3b82f6;
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}
.faq-item details > summary {
    list-style: none;
}
.faq-item details > summary::-webkit-details-marker {
    display: none;
}
.faq-item .faq-icon {
    transition: transform 0.2s;
}
.faq-item details[open] .faq-icon {
    transform: rotate(45deg);
}
.animated-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}
.animated-section.visible {
    opacity: 1;
    transform: translateY(0);
}