/* =========================================================
   1. THEME VARIABLES (Colors for Light and Dark Mode)
   ========================================================= */
:root {
    --bg-color: #f9f9f9;
    --text-color: #333;
    --header-bg: #ffffff;
    --header-title: #1a237e;
    --nav-bg: #cc0000;
    --nav-text: #ffffff;
    --container-bg: #ffffff;
    --border-color: #ccc;
    --shadow-color: rgba(0,0,0,0.1);
}

.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --header-bg: #1e1e1e;
    --header-title: #8c9eff; /* A lighter blue so it shows up on dark backgrounds */
    --nav-bg: #1a1a1a;
    --nav-text: #ffcccc;
    --container-bg: #2a2a2a;
    --border-color: #444;
    --shadow-color: rgba(0,0,0,0.5);
}

/* =========================================================
   2. GLOBAL STYLING
   ========================================================= */
body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    text-align: center; 
    padding: 0; 
    margin: 0; 
    background-color: var(--bg-color); 
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

/* =========================================================
   3. HEADER STYLING
   ========================================================= */
header { 
    text-align: center; 
    padding: 20px 0; 
    background-color: var(--header-bg); 
    transition: background-color 0.3s;
}

header h1 { 
    font-size: 4em;           
    font-weight: 700;         
    margin: 0; 
    color: var(--header-title);           
    letter-spacing: 2px;
    transition: color 0.3s;
}

/* =========================================================
   4. NAVIGATION STYLING
   ========================================================= */
nav { 
    background-color: var(--nav-bg); 
    display: flex; 
    justify-content: space-between; /* Pushes outer items to edges */
    align-items: center; 
    padding: 12px 20px; 
    margin-bottom: 20px; 
    transition: background-color 0.3s;
}

/* The spacer forces the links to the center */
.nav-spacer {
    width: 40px; 
}

/* Container for links to keep them centered */
.nav-links {
    display: flex;
    justify-content: center;
    flex-grow: 1; 
}

nav a { 
    color: var(--nav-text); 
    text-decoration: none; 
    padding: 8px 20px; 
    font-size: 1.1em; 
    font-weight: 500;
}

nav a:hover { 
    background-color: #990000; 
    transition: 0.3s; 
}

/* Dark Mode Toggle Button */
.theme-toggle {
    background: none;
    border: 1px solid var(--nav-text);
    color: var(--nav-text);
    padding: 5px 10px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 1.1em;
    transition: 0.3s;
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* =========================================================
   5. SPECIFIC PAGE ELEMENTS (E-Paper & News)
   ========================================================= */

/* E-Paper PDF Container */
.pdf-container { 
    width: 100%; 
    max-width: 900px; 
    height: 75vh; 
    margin: 0 auto 30px auto; 
    border: 1px solid var(--border-color); 
    box-shadow: 0 4px 10px var(--shadow-color); 
    background-color: var(--container-bg); 
    transition: background-color 0.3s, border-color 0.3s;
}

iframe { 
    width: 100%; 
    height: 100%; 
    border: none; 
}

/* News Article Container */
.news-container {
    max-width: 900px;
    margin: 20px auto 50px auto; 
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: background-color 0.3s;
}

/* Article Headline */
.news-headline {
    color: #cc0000; /* Kept red for emphasis, even in dark mode */
    font-size: 2.0em;
    line-height: 1.3;
    margin-bottom: 20px;
    text-align: center;
}

/* Article Body Text */
.news-content p {
    font-size: 1.15em;
    line-height: 1.8;
    margin-bottom: 20px;
    text-align: justify;
}

/* Dateline */
.dateline {
    font-weight: bold;
    color: var(--text-color); /* Updated to use variable so it stays visible */
    margin-bottom: 20px;
    text-align: center;
}

/* Responsive Image Styling */
.article-image {
    width: 100%;           
    max-height: 400px;     
    object-fit: cover;     
    border-radius: 6px;    
    margin-bottom: 25px;   
}


/* Top Bar Styling */
.top-bar {
    background-color: #ffffff; /* Matches your header */
    color: #333;
    padding: 5px 20px;
    font-size: 0.9em;
    text-align: left;
    border-bottom: 1px solid #ddd;
    transition: background-color 0.3s, color 0.3s;
}

/* Dark Mode support for Top Bar */
.dark-mode .top-bar {
    background-color: #121212;
    color: #e0e0e0;
    border-bottom: 1px solid #444;
}

/* =======================================================
   6. SCIENCE PAGE SUB-NAVIGATION
   /* =======================================================
   /* Science Sub-Navigation Bar */
.sub-nav {
    display: flex;
    justify-content: center;
    background-color: #333; /* Adjust to match your dark theme/nav color */
    padding: 10px;
    gap: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1); 
}

.sub-nav a {
    color: white;
    text-decoration: none;
    font-size: 0.95em;
    padding: 5px 12px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.sub-nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* =======================================================
   7. SPECIFIC PAGE ELEMENTS (E-Paper & News)
   ========================================================= */
/* Blog Tab Interface */
.tab-box {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
}

.tab-btn {
    background-color: transparent;
    color: #888;
    border: 1px solid transparent;
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: white;
    background-color: #333; /* Matches your dark theme */
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.tab-content {
    display: none; /* Hides all content by default */
    animation: fadeEffect 0.5s; /* Smooth fade in */
}

@keyframes fadeEffect {
    from {opacity: 0;}
    to {opacity: 1;}
}

/* =======================================================
   8. PCMB SUBJECT PAGES STYLING
   ========================================================= */
/* PCMB Subject Header */
.subject-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: transparent; /* Adjust if your main header has a color */
}

/* Icon Button Styling (Back arrow & Moon) */
.icon-btn {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    text-decoration: none;
    color: inherit; 
    padding: 8px 12px;
    border-radius: 5px;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hover effect for Light Mode */
.icon-btn:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Hover effect for Dark Mode */
body.dark-mode .icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.left-align {
    text-align: left;
}
/* =======================================================
   9.  Physics Evolution Table Styling 
   ========================================================= */

.table-container {
    width: 100%;
    overflow-x: auto; /* Allows scrolling if table is too wide */
    margin: 30px 0;
}

.evolution-table {
    width: 100%;
    border-collapse: collapse; /* Merges double borders into single neat lines */
    font-size: 0.95em;
}

.evolution-table th, 
.evolution-table td {
    border: 1px solid #ccc;
    padding: 15px;
    text-align: center; /* Centers the equations in the boxes */
}

.evolution-table th {
    background-color: #f4f4f4;
    font-weight: bold;
}

.evolution-table td:first-child {
    text-align: left; /* Keeps the row titles aligned to the left */
}

/* Dark Mode Support for the Table */
body.dark-mode .evolution-table th, 
body.dark-mode .evolution-table td {
    border: 1px solid #555;
}

body.dark-mode .evolution-table th {
    background-color: #222;
    color: #fff;
}

/* =======================================================
   10. Calender Stuff
   ========================================================= */
/* Calendar Container */
.calendar-container {
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.calendar-header h2 {
    margin: 0;
    color: #333;
}

.btn-download {
    background-color: #0056b3;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.btn-download:hover {
    background-color: #003d82;
}

/* Calendar Grid */
.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-weight: bold;
    margin-bottom: 10px;
    color: #555;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day {
    padding: 10px;
    text-align: center;
    border-radius: 4px;
    border: 1px solid #ccc;
    background-color: white;
}

/* Active & Selected Days */
.active-day {
    cursor: pointer;
    color: #0056b3;
    font-weight: bold;
    transition: background-color 0.2s;
}

.active-day:hover {
    background-color: #e2e6ea;
}

.selected-day {
    background-color: #0056b3;
    color: white !important;
    border-color: #004494;
}

/* Future Days & Empty Slots */
.future-day {
    background-color: #e9ecef;
    color: #adb5bd;
    cursor: not-allowed;
    border: 1px dashed #ccc;
}

.empty-day {
    background-color: transparent;
    border: none;
}

/* Dark Mode Support */
body.dark-mode .calendar-container {
    background-color: #222;
    border-color: #444;
}
body.dark-mode .calendar-header h2, 
body.dark-mode .calendar-weekdays { color: #eee; }
body.dark-mode .calendar-day { background-color: #333; border-color: #555; }
body.dark-mode .future-day { background-color: #2a2a2a; color: #666; }
body.dark-mode .active-day:hover { background-color: #444; }

/* Mobile Responsive Adjustments */
@media (max-width: 600px) {
    .calendar-container {
        padding: 10px;
    }
    .calendar-header {
        flex-direction: column;
        gap: 15px;
    }
    .calendar-day {
        padding: 8px 2px;
        font-size: 0.85em;
    }
    .calendar-weekdays {
        font-size: 0.8em;
    }
}
/* Health news formatting */
.news-content ul {
  display: inline-block;   /* shrink-wraps the list to its content width */
  text-align: left;        /* keep text/bullets aligned to each other */
  margin: 0 auto 1.2em;    /* centers the whole block on the page */
  padding-left: 1.5em;     /* normal bullet indent */
}

.news-content li {
  margin-bottom: 0.4em;
}


/* for pdf output*/
@page {
    size: 297mm 420mm; /* A3 Print Size */
    margin: 10mm;
}

.front-page-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4-column layout */
    gap: 12px;
}

.article-body {
    column-count: 3; /* Multi-column news flow */
    column-gap: 15px;
    text-align: justify;
}

/*Chemistry subdivisons*/
:root {
    --bg-color: #f4f4f9;
    --text-color: #333;
    --sidebar-bg: #fff;
    --sidebar-border: #ddd;
    --header-bg: #fff;
    --accent-color: #007bff;
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --sidebar-bg: #1e1e1e;
    --sidebar-border: #333;
    --header-bg: #1e1e1e;
    --accent-color: #4da3ff;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh; /* Changed from height: 100vh */
    overflow-x: hidden; /* Changed from overflow: hidden to only hide horizontal scroll */
}

.subject-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--sidebar-border);
    z-index: 10;
}

.layout-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar Styling */
.sidebar {
    width: 300px;
    flex-shrink: 0; /* Prevents the main content from squishing the sidebar */
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    overflow-y: auto; /* Keeps vertical scrolling */
    overflow-x: hidden; /* Kills the sideways scroll */
    display: block; /* Enforces a strict vertical layout */
    transition: transform 0.3s ease;
}

.sidebar h3 {
    padding: 15px;
    margin: 0;
    font-size: 1.1em;
    background: rgba(0,0,0,0.05);
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar li a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: var(--text-color);
    border-bottom: 1px solid var(--sidebar-border);
    font-size: 0.9em;
    cursor: pointer;
    white-space: normal; /* Forces long text to wrap to the next line */
    word-wrap: break-word; /* Prevents long words from breaking the container */
    line-height: 1.4; /* Adds a bit of breathing room for wrapped text */
}

.sidebar li a:hover {
    background-color: rgba(0, 123, 255, 0.1);
    color: var(--accent-color);
}

/* Main Content Area */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.note-section {
    display: none; /* Hide all sections by default */
}

.note-section.active {
    display: block; /* Show only active section */
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    color: var(--text-color);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    .sidebar {
        position: absolute;
        left: 0;
        top: 60px; /* Height of header */
        bottom: 0;
        transform: translateX(-100%);
        z-index: 100;
    }
    .sidebar.open {
        transform: translateX(0);
    }
}

/* Periodic Table Interactive Elements */
.info-panel {
    background-color: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.info-panel h2 {
    margin-top: 0;
    color: var(--accent-color);
    border-bottom: 2px solid var(--sidebar-border);
    padding-bottom: 10px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.info-item span {
    display: block;
    font-size: 0.9em;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item strong {
    font-size: 1.1em;
    color: var(--text-color);
}

/* Periodic Table Grid */
.periodic-table {
    display: grid;
    grid-template-columns: repeat(18, 1fr);
    gap: 5px;
    margin-top: 20px;
    overflow-x: auto; /* Allows scrolling on very small screens if necessary */
    padding-bottom: 20px;
}

.element {
    background-color: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 4px;
    padding: 8px 4px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    min-height: 60px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.element:hover {
    transform: scale(1.15);
    z-index: 10;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    border-color: var(--accent-color);
}

.element.active-element {
    background-color: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.element .number {
    font-size: 0.7em;
    text-align: left;
    opacity: 0.8;
}

.element .symbol {
    font-size: 1.2em;
    font-weight: bold;
    margin: 2px 0;
}

.element .mass {
    font-size: 0.6em;
    opacity: 0.8;
}

:root {
    --bg-color: #f4f4f9;
    --text-color: #333;
    --sidebar-bg: #fff;
    --sidebar-border: #ddd;
    --header-bg: #fff;
    --accent-color: #007bff;
    
    /* New Block Colors - Light Mode */
    --s-block: #f8d7da; /* Soft Red */
    --p-block: #d1ecf1; /* Soft Blue */
    --d-block: #fff3cd; /* Soft Yellow */
    --f-block: #d4edda; /* Soft Green */
}

body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --sidebar-bg: #1e1e1e;
    --sidebar-border: #333;
    --header-bg: #1e1e1e;
    --accent-color: #4da3ff;
    
    /* New Block Colors - Dark Mode */
    --s-block: #492a2d;
    --p-block: #213e48;
    --d-block: #4d4424;
    --f-block: #224229;
}

/* Block Background Assignments */
.block-s { background-color: var(--s-block); }
.block-p { background-color: var(--p-block); }
.block-d { background-color: var(--d-block); }
.block-f { background-color: var(--f-block); }

/* Ensure the active element still overrides the block color */
.element.active-element {
    background-color: var(--accent-color) !important;
    color: #fff;
    border-color: var(--accent-color);
}

/* Modal Styles */
.modal-overlay {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 85vh; /* Prevents modal from being taller than screen */
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    transform: translateY(20px);
    transition: transform 0.3s ease;
    position: relative;
}

.modal-overlay.show .modal-content {
    transform: translateY(0);
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.8em;
    color: var(--text-color);
    cursor: pointer;
    line-height: 1;
}

.modal-content h2 {
    margin: 0;
    padding: 20px;
    border-bottom: 1px solid var(--sidebar-border);
    color: var(--accent-color);
}

.modal-body {
    padding: 20px;
    overflow-y: auto; /* Makes the modal scrollable */
}

.property-group {
    margin-bottom: 25px;
}

.property-group h3 {
    font-size: 1.1em;
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-color);
    border-bottom: 1px dashed var(--sidebar-border);
    padding-bottom: 5px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.info-item span {
    display: block;
    font-size: 0.8em;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item strong {
    font-size: 1.05em;
    color: var(--text-color);
}

/*Added CSS specifically for the nested School Physics layout*/
        
            .school-layout-container {
                display: flex;
                margin-top: 15px;
                border-top: 1px solid var(--sidebar-border, #e2e8f0);
                min-height: 65vh;
            }
            
            .school-sidebar {
                width: 260px;
                flex: 0 0 260px;
                background-color: var(--sidebar-bg, #ffffff); 
                border-right: 1px solid var(--sidebar-border, #e2e8f0);
                overflow-y: auto;
                height: 100%; 
                padding-right: 0;
                display: block !important; /* Overrides any global flex rules causing top-clipping */
            }

            .school-sidebar ul {
                display: block !important; /* Strictly forces a top-to-bottom block layout */
                list-style: none;
                padding-left: 0;
                margin: 0;
                height: auto;
            }
            
            .school-sidebar li a {
                display: block;
                padding: 12px 20px;
                text-decoration: none;
                cursor: pointer;
                font-size: 0.95em;
                color: var(--text-color, #334155);
                background-color: transparent !important; /* Kills the red background */
                border-bottom: 1px solid var(--sidebar-border, #f8f9fa);
                transition: all 0.25s ease; /* Smooth animation */
            }
            
            /* Modern Hover Effect */
            .school-sidebar li a:hover {
                background-color: rgba(0, 123, 255, 0.05) !important;
                color: var(--accent-color, #007bff);
                padding-left: 26px; /* Gentle indent animation on hover */
                border-left: 4px solid var(--accent-color, #007bff); /* Blue accent line */
            }
            
            .school-main-content {
                flex: 1;
                padding: 10px 40px;
                overflow-y: auto;
                max-height: 70vh;
            }
            
            .school-note-section {
                display: none;
            }
            
            .school-note-section.active-school-section {
                display: block;
                animation: fadeIn 0.3s ease-in-out; /* Soft fade-in for content */
            }
            
            /* Modernized Sub-headers */
            .section-header {
                font-weight: 600; 
                padding: 25px 20px 8px 20px; 
                font-size: 0.75em; 
                color: #64748b; /* Muted slate color */
                text-transform: uppercase;
                letter-spacing: 1.2px; /* Adds breathing room to uppercase text */
                background-color: transparent !important;
            }

            @keyframes fadeIn {
                from { opacity: 0; transform: translateY(5px); }
                to { opacity: 1; transform: translateY(0); }
            }
 

           /* <!-- Added CSS specifically for the nested School Physics layout --> */

            .school-layout-container {
                display: flex;
                flex-direction: row !important; /* Strictly enforces side-by-side */
                flex-wrap: nowrap !important; /* FORBIDS the content from dropping below */
                align-items: flex-start;
                margin-top: 15px;
                border-top: 1px solid var(--sidebar-border, #e2e8f0);
                height: 70vh; /* Locks the height for the internal scroll */
            }
            
            .school-sidebar {
                width: 260px;
                flex: 0 0 260px; /* Bulletproof width: refuses to grow or shrink */
                background-color: var(--sidebar-bg, #ffffff); 
                border-right: 1px solid var(--sidebar-border, #e2e8f0);
                overflow-y: auto;
                height: 100%; /* Fills the 70vh container */
                padding-right: 0;
            }
            
            .school-sidebar ul {
                list-style: none;
                padding-left: 0;
                margin: 0;
            }
            
            .school-sidebar li a {
                display: block;
                padding: 12px 20px;
                text-decoration: none;
                cursor: pointer;
                font-size: 0.95em;
                color: var(--text-color, #334155);
                background-color: transparent !important; 
                border-bottom: 1px solid var(--sidebar-border, #f8f9fa);
                transition: all 0.25s ease; 
            }
            
            /* Modern Hover Effect */
            .school-sidebar li a:hover {
                background-color: rgba(0, 123, 255, 0.05) !important;
                color: var(--accent-color, #007bff);
                padding-left: 26px; 
                border-left: 4px solid var(--accent-color, #007bff); 
            }
            
            .school-main-content {
                flex: 1 1 auto; /* Takes up all remaining space */
                min-width: 0; /* Stops long math equations from breaking the flex layout */
                padding: 20px 40px;
                overflow-y: auto;
                height: 100%; /* Fills the 70vh container */
                text-align: left !important; /* Prevents text from strangely centering */
            }
            
            .school-note-section {
                display: none;
            }
            
            .school-note-section.active-school-section {
                display: block;
                animation: fadeIn 0.3s ease-in-out; 
            }
            
            /* Modernized Sub-headers */
            .section-header {
                font-weight: 600; 
                padding: 25px 20px 8px 20px; 
                font-size: 0.75em; 
                color: #64748b; 
                text-transform: uppercase;
                letter-spacing: 1.2px; 
                background-color: transparent !important;
            }

            @keyframes fadeIn {
                from { opacity: 0; transform: translateY(5px); }
                to { opacity: 1; transform: translateY(0); }
            }