/* =========================================
   1. UNIVERSAL RESET & MOBILE FIX (CRITICAL)
   ========================================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    max-width: 100vw;
    overflow-x: hidden;
    display: flex;
    /* Stops the mobile side-scroll/sliding issue */
}

img,
iframe,
video,
object,
embed {
    max-width: 100% !important;
    /* Prevents images from breaking mobile layout */
}

/* Break long links/words so they don't push the screen out */
p,
a,
h1,
h2,
h3,
div {
    overflow-wrap: break-word;
    word-wrap: break-word;
    hyphens: auto;
}

/* =========================================
   2. VARIABLES (THEME COLORS)
   ========================================= */
:root {
    --primary: #0F766E;
    /* Brand Teal */
    --primary-dark: #0D5F58;
    --accent:#760F17;
    /* Brand Gold */
    --accent-hover: #760F17;
    --bg: #F8FAFC;
    /* Light Grey Background */
    --white: #FFFFFF;
    --text-main: #1E293B;
    /* Dark Blue-Grey Text */
    --text-light: #64748B;
    /* Lighter Text */
    --border: #e2e8f0;
}

/* =========================================
   3. BASE STYLES
   ========================================= */
body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.2s;
}

ul {
    padding-left: 20px;
}

/* =========================================
   4. HEADER
   ========================================= */
.site-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 15px 20px;
    text-align: center;
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    position: sticky;
    /* Keeps header visible slightly */
    top: 0;
    z-index: 100;
}

.site-header a:hover {
    opacity: 0.9;
}

/* =========================================
   5. MAIN LAYOUT (FLEXBOX)
   ========================================= */
.container {
    display: flex;
    flex-wrap: wrap;
    /* Allows Sidebar to drop down on mobile */
    gap: 25px;
    max-width: 1100px;
    margin: 30px auto;
    padding: 0 15px;
    /* Safety padding */
}

/* Content Area (Left) */
.main-content {
    flex: 3;
    /* Takes 75% width on Desktop */
    min-width: 300px;
    /* If screen gets small, it takes full width */
    background: var(--white);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border);
}

/* Sidebar Area (Right) */
.sidebar {
    flex: 1;
    /* Takes 25% width on Desktop */
    min-width: 280px;
    /* Drops below content on Mobile */
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* =========================================
   6. CARDS & TYPOGRAPHY
   ========================================= */
h1 {
    color: var(--primary);
    margin-top: 0;
    font-size: 1.8rem;
    line-height: 1.2;
}

h2 {
    color: var(--text-main);
    font-size: 1.4rem;
    margin-top: 30px;
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 10px;
}

h3 {
    color: var(--primary);
    margin-top: 20px;
    font-size: 1.1rem;
}

.sidebar-card,
.belowbar-card {
    background: var(--white);
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border);
}

/* Exam Details Box */
.exam-details {
    background: #F0FDFA;
    /* Light Teal */
    padding: 20px;
    border-radius: 12px;
    margin: 25px 0;
    border-left: 5px solid var(--primary);
}

.exam-details li {
    margin-bottom: 8px;
    font-size: 0.95rem;
}

/* =========================================
   7. BUTTONS & DOWNLOADS
   ========================================= */
.download-box {
    background: #FFFBEB;
    /* Light Gold */
    border: 1px dashed var(--accent);
    padding: 25px;
    text-align: center;
    border-radius: 12px;
    margin: 30px 0;
}

.btn-download {
    background: var(--accent);
    color: var(--white) !important;
    padding: 12px 30px;
    border-radius: 50px;
    display: inline-block;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(245, 158, 11, 0.3);
    transition: transform 0.2s, background 0.2s;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-download:hover {
    transform: translateY(-2px);
    background: var(--accent-hover);
}


/* Finger-Friendly Buttons for Mobile */
button,
.btn-download,
.sub-btn {
    min-height: 44px;
    touch-action: manipulation;
}

/* =========================================
   8. TABLES & LISTS
   ========================================= */
.science-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.9rem;
}

.science-table th {
    background: var(--primary);
    color: white;
    padding: 12px;
    text-align: left;
}

.science-table td {
    border: 1px solid var(--border);
    padding: 12px;
}

.science-table tr:nth-child(even) {
    background: #f8fafc;
}

.related-links a {
    display: block;
    padding: 10px 0;
    color: var(--text-light);
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.9rem;
}

.related-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

/* =========================================
   9. FOOTER
   ========================================= */
footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 50px;
    border-top: 1px solid var(--border);
    color: var(--text-light);
    font-size: 0.9rem;
    background: var(--white);
}

footer a {
    color: var(--primary);
    margin: 0 8px;
    font-weight: 600;
}

/* =========================================
   10. MOBILE OPTIMIZATION ( < 768px )
   ========================================= */
@media (max-width: 768px) {

    /* Stack Sidebar below Main Content */
    .container {
        flex-direction: column;
        gap: 20px;
    }

    .main-content,
    .sidebar {
        width: 100%;
        min-width: 0;
        /* Prevents overflow issues */
    }

    /* Reduce Padding for small screens */
    .main-content {
        padding: 20px;
    }

    /* Smaller Text */
    h1 {
        font-size: 1.5rem;
    }

    /* Hide timer text initially to save space */
    #timer-msg {
        font-size: 0.85rem;
    }

    /* Adjust PDF Preview height */
    .pdf-preview iframe {
        height: 350px;
    }
}

/* ===== Image Ad Container ===== */
.image-ad {
    margin: 30px 0;
    text-align: center;
}

/* Clickable ad card */
.image-ad a {
    display: inline-block;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

/* Ad image */
.image-ad img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Hover effect (makes it feel interactive) */
.image-ad a:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
}

/* Optional label */
.ad-label {
    font-size: 0.75rem;
    color: #94a3b8;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

/* ===== Sidebar Version ===== */
.sidebar-ad img {
    width: 100%;
    border-radius: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .image-ad {
        margin: 20px 0;
    }
}

/* Experience Feedback Toast */
.experience-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    max-width: 380px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 15px;
    animation: toastSlideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    border-left: 5px solid var(--primary);
}

.toast-content p {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.4;
    margin: 0;
}

.toast-content span {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 400;
    display: block;
    margin-top: 4px;
}

.toast-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn-toast-primary {
    background: var(--primary);
    color: white !important;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.btn-toast-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-light);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
}

@keyframes toastSlideIn {
    from { transform: translateY(100px) scale(0.9); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

.toast-fade-out {
    opacity: 0;
    transform: translateY(20px);
    transition: 0.3s ease;
}

@media (max-width: 480px) {
    .experience-toast {
        left: 15px;
        right: 15px;
        bottom: 15px;
        max-width: none;
    }
}

.login-container {
    margin: 0 15px;
}

.login-form-box {
    width: 100%;
    max-width: 450px;
    padding: 30px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px;
}

.h2 {
    font-size: 34px;
    text-align: center;
    margin-bottom: 20px;
}

.input {
    width: 100%;
    padding: 12px;
    background: #eee;
    border-radius: 6px;
    border: none;
    outline: none;
    font-size: 16px;
    color: #333;
    margin-bottom: 20px;

}

.button {
    width: 100%;
    padding: 12px;
    background:  blue;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 20px;
    transition: .5s;
}

button:hover {
    background: blue;
}

p {
    font-size: 15px;
    text-align: center;
    margin-bottom: 10px;
}

p a {
    color: blue;
    text-decoration: none;

}

p a:hover {
    text-decoration: underline;
}

}