/* =========================================
   1. VARIABLES & RESET
   ========================================= */
:root {
    --primary: #0056b3;        /* Medical Blue */
    --primary-dark: #004494;
    --secondary: #f0f4f8;      /* Light Gray/Blue background */
    --text-dark: #1e293b;
    --text-light: #64748b;
    --white: #ffffff;
    --success: #10b981;        /* Green */
    --error: #ef4444;          /* Red */
    --whatsapp: #25D366;       /* WhatsApp Green */
    --premium: #8b5cf6;        /* Premium Purple */
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--secondary);
    color: var(--text-dark);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* =========================================
   2. LAYOUT UTILITIES
   ========================================= */
.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hidden {
    display: none !important;
}

/* =========================================
   3. HEADER
   ========================================= */
.site-header {
    background-color: var(--white);
    padding: 15px 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.brand-identity {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-logo {
    height: 60px;
    width: auto;
    border-radius: 6px; 
}

.site-header h1 {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 700;
}

/* =========================================
   4. CTA SECTIONS (WhatsApp & App)
   ========================================= */
.cta-section {
    display: grid;
    grid-template-columns: 1fr 1fr; /* Side by side on desktop */
    gap: 20px;
}

/* Specific styling for the top CTA (Home Page) */
.hero-cta {
    margin-bottom: 40px; /* Space BELOW the buttons */
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0; /* Separator line below buttons */
}

.cta-card {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.cta-card h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.cta-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 15px;
}

/* Specific Styles for WhatsApp Card */
.whatsapp-style {
    border-top: 4px solid var(--whatsapp);
}

/* Specific Styles for Premium App Card */
.premium-style {
    border-top: 4px solid var(--premium);
    background: linear-gradient(to bottom right, #fff, #fefeff);
}

/* CTA Buttons */
.btn-cta {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 50px; /* Pill shape */
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.2s, box-shadow 0.2s;
    color: white;
    text-align: center;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-whatsapp {
    background-color: var(--whatsapp);
}

.btn-premium {
    background-color: var(--premium);
}

/* Vertical layout for Results Page */
.vertical-cta {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 400px;
    margin: 30px auto 0;
    border-top: none; 
    align-items: center;
}

.cta-intro {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.full-width {
    width: 100%;
}

.divider {
    border: 0;
    height: 1px;
    background: #e2e8f0;
    margin: 30px 0;
}

/* =========================================
   5. VIEWS & SECTIONS
   ========================================= */
.view {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    margin-bottom: 25px;
    text-align: center;
}

.section-header h2 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-light);
}

/* =========================================
   6. STANDARD BUTTONS
   ========================================= */
button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    width: 100%;
    margin-top: 10px;
}

.btn-outline {
    background-color: transparent;
    color: var(--text-light);
    padding: 12px 24px;
    margin-top: 10px;
    text-decoration: underline;
}

.btn-text {
    background: none;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 20px;
    padding: 0;
}

/* =========================================
   7. SUBCOURSE GRID & TOPIC LIST
   ========================================= */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.list-layout {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.topic-item {
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.topic-item:hover {
    background-color: #f8fafc;
}

.arrow {
    color: var(--primary);
    font-weight: bold;
}

/* =========================================
   8. QUIZ INTERFACE
   ========================================= */
.quiz-header {
    margin-bottom: 20px;
}

.quiz-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 600;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--primary);
    width: 0%;
    transition: width 0.3s ease;
}

.question-card {
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.question-card h3 {
    font-size: 1.25rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-btn {
    text-align: left;
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 15px;
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-dark);
    transition: all 0.2s;
}

.option-btn:hover:not(:disabled) {
    background-color: #e2e8f0;
}

.option-btn.correct {
    background-color: #d1fae5; /* Light green bg */
    border-color: var(--success);
    color: #065f46;
}

.option-btn.wrong {
    background-color: #fee2e2; /* Light red bg */
    border-color: var(--error);
    color: #991b1b;
}

/* =========================================
   9. FEEDBACK SECTION
   ========================================= */
.feedback-container {
    background-color: var(--white);
    padding: 20px;
    border-radius: var(--border-radius);
    border-left: 5px solid var(--primary);
    box-shadow: var(--shadow);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.feedback-container h4 {
    margin-bottom: 5px;
}

.feedback-container p {
    margin-bottom: 15px;
    color: var(--text-light);
    font-size: 0.95rem;
}

.feedback-container.success { border-color: var(--success); }
.feedback-container.error { border-color: var(--error); }
.feedback-container.success h4 { color: var(--success); }
.feedback-container.error h4 { color: var(--error); }

/* =========================================
   10. RESULTS PAGE
   ========================================= */
.result-card {
    background: var(--white);
    padding: 40px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.score-display {
    margin: 30px 0;
}

#score-percentage {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
}

#score-text {
    font-size: 1.1rem;
    color: var(--text-light);
}

.action-buttons {
    max-width: 300px;
    margin: 0 auto;
}

/* =========================================
   11. FOOTER & MOBILE
   ========================================= */
.site-footer {
    margin-top: auto;
    padding: 30px 0;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid #e2e8f0;
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
    .cta-section {
        grid-template-columns: 1fr; /* Stack on mobile */
    }
    
    .header-content {
        justify-content: center;
    }
}