:root {
    /* Pastel Theme Colors matching Virus Structure image */
    --bg-color: #f0fdfa;
    --surface-color: rgba(255, 255, 255, 0.70);
    --primary-color: #a78bfa; 
    --primary-hover: #8b5cf6;
    --text-main: #334155;
    --text-muted: #64748b;
    --accent-color: #f472b6; 
    --border-color: rgba(0, 0, 0, 0.1);
    /* BUILT-IN SYSTEM FONTS: No 3rd party links required */
    --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: url('../images/bg-virus-new.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    font-size: 1.05rem;
    cursor: url('../images/cursor.png');
}

#virus-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.cursor-follower {
    position: fixed;
    top: 0;
    left: 0;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.9) 0%, rgba(139, 92, 246, 0.7) 30%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 99999;
    transition: transform 0.05s linear;
    mix-blend-mode: hard-light;
    filter: blur(80px);
}

#custom-cursor-img {
    position: fixed;
    top: 0;
    left: 0;
    width: 80px;
    height: 80px;
    background-image: url('../images/cursor.png');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    mix-blend-mode: darken;
    filter: contrast(1.5) brightness(1.1);
    clip-path: circle(46% at 50% 50%);
    pointer-events: none;
    z-index: 100000;
    transform: translate(-50%, -50%);
    transition: opacity 0.1s;
}

body {
    cursor: none;
}

input, button, textarea, select, a, .sidebar-item, .toggle-btn, .radio-label, .view-3d-btn {
    cursor: auto !important;
}

button, a, .sidebar-item, .toggle-btn, .view-3d-btn, input[type="radio"], input[type="checkbox"] {
    cursor: pointer !important;
}

body:has(input:hover) #custom-cursor-img,
body:has(button:hover) #custom-cursor-img,
body:has(textarea:hover) #custom-cursor-img,
body:has(select:hover) #custom-cursor-img,
body:has(a:hover) #custom-cursor-img,
body:has(.sidebar-item:hover) #custom-cursor-img,
body:has(.toggle-btn:hover) #custom-cursor-img,
body:has(.radio-label:hover) #custom-cursor-img {
    opacity: 0;
}

input[type="number"] {
    pointer-events: auto !important;
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    pointer-events: auto !important;
    opacity: 1 !important;
    display: block !important;
    cursor: pointer !important;
}

.hero { text-align: center; position: relative; z-index: 2; }

.hero-background {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.5), rgba(240, 253, 250, 0.3));
    padding: 60px 20px 30px;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1), transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.horizontal-menu-container {
    transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1), transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

body.scrolled .hero-background,
body.scrolled .horizontal-menu-container {
    opacity: 0;
    transform: translateY(-40px);
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #8b5cf6, #ec4899, #8b5cf6);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientMove 8s linear infinite, fadeLeftRight 1.5s ease-out forwards;
}

@keyframes fadeLeftRight {
    0% { opacity: 0; transform: translateX(-50px); }
    100% { opacity: 1; transform: translateX(0); }
}

@keyframes gradientMove {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

button {
    font-family: var(--font-family);
    border: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

#search-btn,
.primary-btn {
    padding: 15px 30px;
    border-radius: 30px;
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    box-shadow: 0 4px 6px rgba(167, 139, 250, 0.3);
}

#search-btn:hover,
.primary-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(167, 139, 250, 0.4);
}

.secondary-btn {
    padding: 10px 20px;
    border-radius: 20px;
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    font-weight: 600;
    background: rgba(255, 255, 255, 0.5);
}

.secondary-btn:hover {
    background-color: var(--accent-color);
    color: white;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

@keyframes shadowPulse {
    0% { box-shadow: 0 0 40px rgba(109, 40, 217, 0.8); }
    50% { box-shadow: 0 0 60px rgba(190, 24, 93, 0.9); }
    100% { box-shadow: 0 0 40px rgba(109, 40, 217, 0.8); }
}

.overview-box {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    padding: 40px !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    animation: shadowPulse 4s infinite;
    transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

body.scrolled .overview-box { transform: translateY(-120px); }

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.controls h2 {
    font-weight: 600;
    font-size: 1.8rem;
    color: var(--text-main);
}

.about-content {
    font-size: 1.05rem;
    color: black;
    text-align: justify;
    line-height: 1.7;
    margin-bottom: 30px;
    opacity: 1;
    transform: none;
}
.about-content p { margin-bottom: 15px; }



.main-content-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.horizontal-menu {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
    margin-bottom: 40px;
}

.sidebar-item {
    background-color: #fce7f3; 
    padding: 15px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    color: #8b5cf6;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(236, 72, 153, 0.2);
    text-align: center;
}

.sidebar-item:hover, .sidebar-item:active {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 15px rgba(236, 72, 153, 0.2);
    background-color: #db2777; /* Dark pink */
    color: white;
    border-color: #db2777;
}

.options-menu-container {
    opacity: 1;
    transform: translateY(-40px);
    transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1), transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
    pointer-events: auto;
    margin-bottom: 30px;
}

body.scrolled .options-menu-container {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    margin-bottom: 30px;
}

.sidebar-item.selected {
    background-color: #db2777;
    color: white;
    box-shadow: 0 10px 15px rgba(219, 39, 119, 0.4);
    border-color: #db2777;
}

.grid {
    flex-grow: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(167, 139, 250, 0.2);
    border-color: var(--primary-color);
}

.card h3 { font-size: 1.4rem; margin-bottom: 10px; color: var(--text-main); }
.card .taxonomy { font-size: 0.9rem; color: var(--accent-color); margin-bottom: 15px; font-weight: 600; }
.card p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 20px; flex-grow: 1; }

.card-actions { display: flex; gap: 10px; }
.card-actions button {
    flex: 1; padding: 8px; border-radius: 8px;
    background: rgba(167, 139, 250, 0.1); color: var(--primary-color);
    border: 1px solid rgba(167, 139, 250, 0.2); font-weight: 600;
}
.card-actions button:hover { background: var(--primary-color); color: white; border-color: var(--primary-color); }

.loading { grid-column: 1 / -1; text-align: center; padding: 50px; color: var(--text-muted); font-size: 1.2rem; }

.modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(5px);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000; opacity: 1; transition: opacity 0.3s ease;
}
.modal.hidden { opacity: 0; pointer-events: none; }
.modal-content {
    background: var(--surface-color); padding: 40px; border-radius: 16px;
    width: 90%; max-width: 500px; border: 1px solid var(--border-color);
    position: relative; transform: translateY(0); transition: transform 0.3s ease;
    backdrop-filter: blur(20px); box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}
.modal.hidden .modal-content { transform: translateY(-50px); }
.close-btn { position: absolute; top: 20px; right: 20px; font-size: 1.5rem; color: var(--text-muted); cursor: pointer; }
.close-btn:hover { color: var(--text-main); }
.modal h2 { margin-bottom: 20px; color: var(--text-main); }

.centered-box {
    background: var(--surface-color); padding: 40px; border-radius: 16px;
    width: 100%; max-width: 500px; margin: 40px auto; border: 1px solid var(--border-color);
    backdrop-filter: blur(20px); box-shadow: 0 10px 30px rgba(0,0,0,0.05); text-align: left;
}

.centered-box h2 { color: var(--text-main); margin-bottom: 20px; text-align: center; }

.two-col-layout {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 20px;
}

.big-box {
    background: var(--surface-color); padding: 30px; border-radius: 16px;
    border: 1px solid rgba(236, 72, 153, 0.2); backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}
.big-box h3 {
    color: var(--primary-color); font-size: 1.5rem; margin-bottom: 20px;
    text-align: center; border-bottom: 2px solid rgba(236, 72, 153, 0.2); padding-bottom: 10px;
}

.pink-submit-btn {
    background-color: #ec4899; color: white; font-weight: 800; font-size: 1.2rem;
    padding: 15px 50px; border-radius: 30px; box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4); letter-spacing: 2px;
}
.pink-submit-btn:hover {
    background-color: #db2777; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(236, 72, 153, 0.6);
}

.hidden { display: none !important; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; color: var(--text-muted); font-size: 1.1rem; font-weight: 600; }
.form-group input, .form-group textarea {
    width: 100%; padding: 10px 15px; border-radius: 8px; border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.6); color: var(--text-main); font-family: var(--font-family);
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary-color); background: white; }

.toggle-btn {
    padding: 10px 24px; border-radius: 20px; background: rgba(255, 255, 255, 0.6);
    border: 2px solid var(--primary-color); color: var(--text-main); font-weight: 600;
    cursor: pointer; transition: all 0.3s ease; font-family: var(--font-family);
}
.toggle-btn:hover { background: rgba(167, 139, 250, 0.1); }
.toggle-btn.active {
    background: var(--primary-color); color: white; border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(167, 139, 250, 0.4); transform: translateY(-2px);
}

/* --- EPITOPE PREDICTION NEW TABLE STYLES --- */
.results-container-responsive {
    grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; width: 100%;
}
.table-container {
    background: var(--surface-color); padding: 20px; border-radius: 12px;
    border: 1px solid var(--border-color); box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.table-scroll { overflow-x: auto; }
.results-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.results-table th, .results-table td { padding: 10px; text-align: left; border-bottom: 1px solid var(--border-color); color: var(--text-main); }
.results-table th { background: rgba(139, 92, 246, 0.1); color: var(--primary-color); font-weight: 600; white-space: nowrap; }

.toxic-warning { color: #dc2626; font-weight: bold; background: #fee2e2; padding: 3px 8px; border-radius: 6px; }
.safe-badge { color: #16a34a; font-weight: bold; background: #dcfce7; padding: 3px 8px; border-radius: 6px; }


/* --- UNIVERSAL MOBILE RESPONSIVENESS (1-LINE FIX EXPANDED) --- */
@media screen and (max-width: 992px) {
    .two-col-layout { grid-template-columns: 1fr; }
    .results-container-responsive { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2.2rem; }
    .pink-submit-btn { width: 100%; padding: 15px; margin-bottom: 10px; }
    .options-menu-container .horizontal-menu { flex-wrap: wrap; }
    .horizontal-menu { flex-wrap: wrap; gap: 10px; }
}

/* --- BOLD EPITOPE TEXT OVERRIDE --- */
.peptide-str { 
    font-family: 'Courier New', Courier, monospace !important; 
    font-weight: 900 !important; 
    font-size: 1.15rem !important; 
    letter-spacing: 1px;
    color: #7c3aed !important; 
    background: rgba(139, 92, 246, 0.1); 
    padding: 4px 8px; 
    border-radius: 4px;
}

/* --- NEW PASTEL TABLE STYLES --- */
.results-grid {
    display: grid; 
    grid-template-columns: max-content max-content; 
    justify-content: center;
    gap: 25px; 
    width: 100%;
    grid-column: 1 / -1;
}

.pastel-table-wrapper {
    background: rgba(255, 255, 255, 0.90);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    backdrop-filter: blur(10px);
}

.bcell-theme { border: 2px solid rgba(167, 139, 250, 0.4); }
.tcell-theme { border: 2px solid rgba(52, 211, 153, 0.4); }

.bcell-title { color: #8b5cf6; margin-bottom: 15px; border-bottom: 2px solid rgba(167, 139, 250, 0.2); padding-bottom: 8px;}
.tcell-title { color: #10b981; margin-bottom: 15px; border-bottom: 2px solid rgba(52, 211, 153, 0.2); padding-bottom: 8px;}

.pastel-table { width: 100%; border-collapse: collapse; color: var(--text-main); font-size: 0.95rem; }
.pastel-table th { padding: 12px; text-align: left; text-transform: uppercase; font-size: 0.8rem; letter-spacing: 1px;}
.bcell-theme th { background: rgba(167, 139, 250, 0.1); color: #8b5cf6; }
.tcell-theme th { background: rgba(52, 211, 153, 0.1); color: #10b981; }

.pastel-table td { padding: 12px; border-bottom: 1px solid rgba(0,0,0,0.05); vertical-align: middle; }
.pastel-table tr:hover { background: rgba(0,0,0,0.02); }

.toxic-warning { color: #dc2626; font-weight: 800; background: rgba(220,38,38,0.15); padding: 4px 8px; border-radius: 4px; border: 1px solid rgba(220,38,38,0.3);}
.safe-badge { color: #16a34a; font-weight: 800; background: rgba(22,163,74,0.15); padding: 4px 8px; border-radius: 4px; border: 1px solid rgba(22,163,74,0.3);}

/* --- NEW DETAILED TILES FOR METADATA --- */
.detailed-tile {
    background: rgba(255, 255, 255, 0.9);
    border-left: 5px solid var(--primary-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    width: 100%;
}
.pdb-tile { border-left-color: #3b82f6; }
.pubmed-tile { border-left-color: #10b981; }
.detailed-tile h4 { font-size: 1.2rem; color: #1e293b; margin-bottom: 5px; }
.link-btn { display: inline-block; margin-top: 10px; font-weight: bold; text-decoration: none; }
.pdb-tile .link-btn { color: #3b82f6; }
.pubmed-tile .link-btn { color: #10b981; }

@media screen and (max-width: 1100px) {
    .results-grid { grid-template-columns: 1fr; }
}

/* --- EXPLICIT VIEW 3D BUTTON CLASS --- */
.view-3d-btn {
    background: #10b981;
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    border: none;
    cursor: pointer !important;
    font-size: 0.85rem;
    font-weight: bold;
    pointer-events: auto !important;
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}
.view-3d-btn:hover {
    transform: scale(1.1);
    background: #059669;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.4);
}

/* --- AUTHENTICATION PAGES --- */
.auth-container {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 40px;
    margin-bottom: 40px;
}
.form-row {
    display: flex;
    gap: 20px;
}
.form-row > .form-group {
    flex: 1;
}
.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 10px;
    margin-bottom: 15px;
}
.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-main);
}
select {
    width: 100%;
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.6);
    color: var(--text-main);
    font-family: var(--font-family);
}
select:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
}
.doc-nav{position:sticky;top:20px;z-index:50;background:rgba(255,255,255,0.88);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(192,132,252,0.3);border-radius:14px;padding:14px 12px;min-width:170px;max-width:200px;max-height:80vh;overflow-y:auto;}
.doc-nav p{font-size:0.84rem;font-weight:800;letter-spacing:1.2px;text-transform:uppercase;color:#c084fc;margin-bottom:10px;font-family:'Calibri','Open Sans',sans-serif;padding-left:2px;}
.doc-nav a{display:block;font-size:0.95rem;font-weight:700;color:rgba(126,34,206,0.85);text-decoration:none;padding:5px 8px;border-radius:6px;margin-bottom:2px;font-family:'Calibri','Open Sans',sans-serif;transition:all 0.2s;border-left:2px solid transparent;}
.doc-nav a:hover{background:rgba(192,132,252,0.15);color:#7e22ce;border-left-color:#c084fc;padding-left:12px;}
.scroll-top-btn{position:fixed;bottom:28px;right:28px;z-index:999;width:48px;height:48px;border-radius:50%;background:#f472b6;border:none;cursor:pointer !important;box-shadow:0 4px 14px rgba(244,114,182,0.45);display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:white;transition:all 0.3s;}
.scroll-top-btn:hover{background:#db2777;transform:translateY(-3px);}