/* --- Base & Variables --- */
:root {
    --primary-color: #3a5a9a;
    --secondary-color: #5e82c8;
    --accent-color: #f0ad4e;
    --text-color: #212529;
    --light-text-color: #ffffff;
    --muted-text-color: #6c757d;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --section-divider-color: #e9ecef;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --nav-bg-color: var(--card-bg);
    --nav-text-color: var(--primary-color);
    --nav-height: 70px; /* Consistent nav height */

    --text-on-primary-bg: var(--light-text-color);
    --text-on-secondary-bg: var(--light-text-color);
    --text-on-accent-bg: var(--text-color);
    --text-on-light-bg: var(--text-color);
    --text-on-dark-bg: var(--light-text-color);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --base-font-size: 1.05rem;
    --line-height: 1.7;
    --border-radius: 8px;
    --box-shadow: 0 5px 18px rgba(0, 0, 0, 0.08);
    --transition-speed: 0.25s ease-in-out;
    --quiz-transition-speed: 0.35s; /* Speed for quiz animations */
}

/* --- Global Styles & Resets --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 15px); /* Offset for fixed nav */ }
body {
    font-family: var(--font-family); font-size: var(--base-font-size);
    line-height: var(--line-height); color: var(--text-color); /* Default text color for body content */
    background-color: var(--bg-color); margin: 0; padding: 0;
    padding-top: var(--nav-height); /* Space for fixed nav */
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
/* Prevent scrolling when mobile menu is open */
body.mobile-menu-open { overflow: hidden; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* --- Accessibility --- */
.skip-link {
    position: absolute; top: -50px; left: 0;
    background: var(--primary-color); color: var(--text-on-primary-bg);
    padding: 10px 15px; z-index: 1100; transition: top 0.3s ease;
    border-bottom-right-radius: var(--border-radius); text-decoration: none;
}
.skip-link:focus { top: var(--nav-height); text-decoration: underline; }
.sr-only, .visually-hidden { /* Hide visually, keep accessible */
    position: absolute !important; height: 1px; width: 1px;
    overflow: hidden; clip: rect(1px, 1px, 1px, 1px); white-space: nowrap;
}

/* --- Main Navigation --- */
.main-nav {
    background-color: var(--nav-bg-color); border-bottom: 1px solid var(--border-color);
    position: fixed; top: 0; left: 0; width: 100%; height: var(--nav-height);
    z-index: 1000; box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 100%; }
.logo { font-size: 1.5rem; font-weight: 700; color: var(--primary-color); text-decoration: none; }
.nav-menu-list { display: flex; list-style: none; margin: 0; padding: 0; gap: 5px; }
.nav-link { display: block; padding: 8px 12px; color: var(--nav-text-color); text-decoration: none; font-weight: 600; border-radius: 4px; transition: background-color var(--transition-speed), color var(--transition-speed); white-space: nowrap; }
.nav-link:hover, .nav-link:focus-visible, .nav-link.active { background-color: var(--primary-color); color: var(--text-on-primary-bg); text-decoration: none; }
.nav-cta { background-color: var(--accent-color); color: var(--text-on-accent-bg) !important; padding: 8px 18px; }
.nav-cta:hover, .nav-cta:focus-visible { background-color: #e09a37; color: var(--text-on-accent-bg) !important; }

/* Hamburger Menu Toggle */
.menu-toggle { display: none; background: none; border: none; padding: 10px; cursor: pointer; z-index: 1050; }
.hamburger-icon { display: block; width: 25px; height: 3px; background-color: var(--primary-color); border-radius: 3px; position: relative; transition: transform 0.3s ease, background-color 0.3s ease; }
.hamburger-icon::before, .hamburger-icon::after { content: ''; display: block; width: 100%; height: 100%; background-color: var(--primary-color); border-radius: 3px; position: absolute; left: 0; transition: transform 0.3s ease, top 0.3s ease, bottom 0.3s ease; }
.hamburger-icon::before { top: -8px; }
.hamburger-icon::after { bottom: -8px; }
/* Active State for Hamburger */
.menu-toggle[aria-expanded="true"] .hamburger-icon { background-color: transparent; }
.menu-toggle[aria-expanded="true"] .hamburger-icon::before { transform: rotate(45deg); top: 0; }
.menu-toggle[aria-expanded="true"] .hamburger-icon::after { transform: rotate(-45deg); bottom: 0; }

/* --- Typography --- */
h1, h2, h3 { line-height: 1.3; margin: 0 0 1.3rem 0; font-weight: 700; }
h1 { font-size: clamp(2.1rem, 5vw, 3rem); color: var(--primary-color); }
h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); color: var(--primary-color); }
h3 { font-size: clamp(1.3rem, 3.5vw, 1.8rem); color: var(--secondary-color); }
p { margin: 0 0 1.2rem 0; max-width: 75ch; }
a { color: var(--secondary-color); text-decoration: none; transition: color var(--transition-speed); }
a:hover, a:focus-visible { color: var(--primary-color); text-decoration: underline; }
strong { font-weight: 700; }
ul { list-style: none; padding-left: 0; margin-bottom: 1.2rem; }
/* Default list style for non-special lists */
ul:not(.resource-list):not(.nav-menu-list) li { margin-bottom: 0.8rem; position: relative; padding-left: 28px; }
ul:not(.resource-list):not(.nav-menu-list) li::before { content: '•'; color: var(--accent-color); position: absolute; left: 5px; top: 0.1em; font-size: 1.4em; line-height: 1; }
/* Intro list specific style */
.intro-section ul li::before { content: '✓'; color: var(--secondary-color); }

/* --- Buttons & CTAs --- */
.cta-button {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px 28px; border-radius: var(--border-radius);
    font-size: 1.05rem; font-weight: 600; text-align: center; cursor: pointer;
    transition: all var(--transition-speed); border: 2px solid transparent;
    margin: 0.5rem 0.5rem 0.5rem 0; vertical-align: middle;
}
.cta-button .icon { display: inline-block; }
.primary-cta { background-color: var(--primary-color); color: var(--text-on-primary-bg); border-color: var(--primary-color); }
.primary-cta:hover:not(:disabled), .primary-cta:focus-visible:not(:disabled) { background-color: var(--secondary-color); border-color: var(--secondary-color); color: var(--text-on-secondary-bg); text-decoration: none; transform: translateY(-3px); box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15); }
.primary-cta:active:not(:disabled) { transform: translateY(-1px); box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1); }
.secondary-cta { background-color: transparent; color: var(--primary-color); border: 2px solid var(--primary-color); }
.secondary-cta:hover:not(:disabled), .secondary-cta:focus-visible:not(:disabled) { background-color: var(--primary-color); color: var(--text-on-primary-bg); text-decoration: none; transform: translateY(-3px); }
.secondary-cta:active:not(:disabled) { transform: translateY(-1px); }

/* Enhanced Focus State */
:focus-visible { outline: 3px solid var(--accent-color); outline-offset: 3px; border-radius: var(--border-radius); }
a:focus-visible { outline-radius: 2px; }
*:focus:not(:focus-visible) { outline: none; }

/* --- Section Styling --- */
section { padding: clamp(40px, 8vw, 80px) 0; overflow-x: hidden; }
.section-divider { border-bottom: 1px solid var(--section-divider-color); }
.final-cta-section { border-bottom: none; }

/* --- Hero Section --- */
.hero-section { background: linear-gradient(135deg, #eef2f7 0%, #d5e0f0 100%); color: var(--text-color); /* Dark text on light gradient */ text-align: center; margin-top: calc(-1 * var(--nav-height)); padding-top: calc(var(--nav-height) + clamp(60px, 10vw, 100px)); padding-bottom: clamp(50px, 10vw, 100px); }
.hero-section h1 { color: var(--primary-color); }
.hero-section .subtitle { font-size: 1.2rem; margin: 1rem auto 2rem auto; color: var(--muted-text-color); max-width: 700px; }
.hero-section .cta-group { margin-top: 1.5rem; }
.hero-image { max-width: 180px; margin-top: 2rem; border-radius: var(--border-radius); box-shadow: var(--box-shadow); }

/* --- Intro Section --- */
.intro-section h3 { margin-top: 1.5rem; }
.intro-content { display: flex; gap: 30px; align-items: flex-start; }
.intro-text { flex: 1; }
.intro-graphic { flex-basis: 300px; }

/* --- Quiz Section --- */
.quiz-section { background-color: var(--card-bg); }
.quiz-section h2, .quiz-section > .container > p { text-align: center; max-width: 700px; margin-left: auto; margin-right: auto; }
.quiz-section > .container > p { margin-bottom: 2rem; color: var(--muted-text-color); }

/* Progress Bar */
#progress-container { width: 100%; max-width: 700px; margin: 0 auto 2.5rem auto; text-align: center; }
#quiz-progress { width: 100%; height: 12px; appearance: none; border: none; border-radius: var(--border-radius); overflow: hidden; background-color: #e9ecef; }
#quiz-progress::-webkit-progress-bar { background-color: #e9ecef; border-radius: var(--border-radius); }
#quiz-progress::-webkit-progress-value { background-color: var(--success-color); border-radius: 0; transition: width var(--quiz-transition-speed) ease-in-out; }
#quiz-progress::-moz-progress-bar { background-color: var(--success-color); border-radius: var(--border-radius); transition: width var(--quiz-transition-speed) ease-in-out; }
#progress-text { display: block; margin-top: 8px; font-size: 0.9rem; color: var(--muted-text-color); font-weight: 600; }

/* Quiz Interface & Transitions */
#quiz-interface { max-width: 700px; margin: 0 auto; position: relative; min-height: 400px; } /* Ensure space for elements */
#question-transition-wrapper {
    background-color: var(--bg-color); padding: clamp(25px, 5vw, 40px);
    border-radius: var(--border-radius); box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
    transition: transform var(--quiz-transition-speed) ease-in-out, opacity var(--quiz-transition-speed) ease-in-out;
    width: 100%; margin-bottom: 1.5rem; /* Space between questions and nav */
}
/* Animation States */
#question-transition-wrapper.entering { opacity: 0; transform: translateX(40px); }
#question-transition-wrapper.exiting { opacity: 0; transform: translateX(-40px); position: absolute; top: 0; left: 0; width: 100%; pointer-events: none; }
#question-transition-wrapper.entering-prev { opacity: 0; transform: translateX(-40px); }
#question-transition-wrapper.exiting-prev { opacity: 0; transform: translateX(40px); position: absolute; top: 0; left: 0; width: 100%; pointer-events: none;}


#question-text { font-size: clamp(1.2rem, 3vw, 1.4rem); font-weight: 600; margin-bottom: 1.8rem; color: var(--primary-color); }
#options-container button {
    position: relative; display: block; width: 100%;
    padding: 16px 15px 16px 45px; margin-bottom: 12px; text-align: left; font-size: 1rem;
    background-color: var(--card-bg); border: 2px solid var(--border-color);
    border-radius: var(--border-radius); cursor: pointer; transition: all var(--transition-speed);
    color: var(--text-color);
}
#options-container button:hover:not(.selected) { background-color: #f8f9fa; border-color: var(--secondary-color); transform: translateX(3px); }
#options-container button.selected { background-color: var(--secondary-color); color: var(--text-on-secondary-bg); border-color: var(--primary-color); font-weight: 600; transform: scale(1.01); box-shadow: 0 3px 8px rgba(0,0,0,0.1); }
#options-container button .checkmark {
    position: absolute; left: 15px; top: 50%; transform: translateY(-50%) scale(0);
    font-size: 1.3em; color: var(--text-on-secondary-bg);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275); opacity: 0;
}
#options-container button.selected .checkmark { transform: translateY(-50%) scale(1); opacity: 1; }
.feedback-message { margin-top: 18px; font-style: italic; font-weight: 500; color: var(--info-color); min-height: 1.3em; }

/* Quiz Navigation Buttons */
.quiz-navigation { display: flex; justify-content: space-between; align-items: center; margin-top: 1rem; padding: 0 clamp(5px, 2vw, 10px); }
.quiz-nav-btn { padding: 12px 24px; font-size: 1rem; margin: 0; }
/* Disabled State - Crucial */
.quiz-nav-btn:disabled { background-color: #ccc !important; border-color: #ccc !important; color: #888 !important; cursor: not-allowed; opacity: 0.7; transform: none !important; box-shadow: none !important; }
/* Specific color for Previous button (when enabled) */
#prev-btn { background-color: var(--muted-text-color); border-color: var(--muted-text-color); color: var(--text-on-dark-bg); }
#prev-btn:hover:not(:disabled) { background-color: #5a6268; border-color: #545b62; transform: translateY(-2px); }
#prev-btn:disabled { background-color: #e0e0e0 !important; border-color: #e0e0e0 !important; color: #aaa !important; } /* More specific disabled for prev */
/* Next/Finish Button Text Handling */
#next-btn .finish-text { display: none; }
#next-btn.finish-mode .next-text,
#next-btn.finish-mode .next-icon { display: none; }
#next-btn.finish-mode .finish-text { display: inline; }

/* --- Results Area --- */
#results-area { background-color: var(--bg-color); padding: clamp(30px, 5vw, 50px); border-radius: var(--border-radius); box-shadow: var(--box-shadow); border: 1px solid var(--border-color); max-width: 700px; margin: 2rem auto 0 auto; text-align: center; opacity: 0; /* Start hidden */ animation: fadeInResults 0.5s 0.1s ease forwards; }
@keyframes fadeInResults { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
#results-area h3 { margin-bottom: 2rem; color: var(--primary-color); }
/* Results Gauge Styles */
.results-gauge-container { position: relative; width: 160px; height: 160px; margin: 0 auto 1.5rem auto; }
.gauge-outer { width: 160px; height: 160px; border-radius: 50%; background-color: #e9ecef; padding: 10px; box-shadow: inset 0 0 10px rgba(0,0,0,0.1); }
.gauge-inner { width: 140px; height: 140px; border-radius: 50%; background-color: var(--card-bg); display: flex; align-items: center; justify-content: center; position: relative; z-index: 1; }
.gauge-data { font-size: 2rem; font-weight: 700; color: var(--primary-color); }
.gauge-svg { position: absolute; top: 0; left: 0; transform: rotate(-90deg); z-index: 0; }
#gauge-circle { fill: none; stroke: url(#gaugeGradient); stroke-width: 10; stroke-dasharray: 440; /* Circumference for r=70 */ stroke-dashoffset: 440; transition: stroke-dashoffset 1s ease-in-out; }
.gauge-subtext { font-size: 0.9rem; color: var(--muted-text-color); margin-top: 0.5rem; }
/* Grade display */
#grade-display { margin-top: 1rem; font-size: 1.1rem; text-align: center; }
#grade-display strong { display: inline-flex; align-items: center; gap: 8px; font-size: 1.3em; padding: 8px 18px; border-radius: 50px; color: var(--text-on-dark-bg); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 700; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
#grade-display strong.low::before { content: '⚠️'; } #grade-display strong.medium::before { content: '👍'; } #grade-display strong.high::before { content: '✅'; }
#grade-display strong.low { background-color: var(--danger-color); } #grade-display strong.medium { background-color: var(--warning-color); color: var(--text-color); } #grade-display strong.high { background-color: var(--success-color); }
#grade-display strong.grade-placeholder { background-color: #ccc; color: var(--muted-text-color); } #grade-display strong.grade-placeholder::before { content: '...';}
#results-feedback { margin-top: 1.5rem; padding: 20px; background-color: #eef2f7; border-left: 5px solid var(--accent-color); border-radius: 0 var(--border-radius) var(--border-radius) 0; text-align: left; }
.results-actions { margin-top: 2rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }

/* --- Resources Section --- */
.resources-section { background-color: var(--bg-color); }
.resources-section h2 { margin-bottom: 1.5rem; }
.resource-list { list-style: none; padding: 0; margin: 0; }
.resource-list li { margin-bottom: 0; padding: 0; }
.resource-list li::before { display: none; }
.resource-list a { display: block; padding: 15px 20px; background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--border-radius); margin-bottom: 10px; font-weight: 600; color: var(--primary-color); transition: all var(--transition-speed); text-decoration: none; }
.resource-list a:hover, .resource-list a:focus-visible { background-color: var(--secondary-color); color: var(--text-on-secondary-bg); border-color: var(--primary-color); transform: scale(1.02); box-shadow: 0 4px 10px rgba(0,0,0,0.1); text-decoration: none; }
.external-link-icon { display: inline-block; margin-left: 5px; font-size: 0.9em; opacity: 0.7; transition: opacity var(--transition-speed); }
.resource-list a:hover .external-link-icon, .resource-list a:focus-visible .external-link-icon { opacity: 1; }

/* --- Final CTA Section --- */
.final-cta-section { background: linear-gradient(135deg, #dfe9f3 0%, #ffffff 100%); color: var(--text-color); /* Dark text */ text-align: center; padding-top: clamp(50px, 10vw, 100px); padding-bottom: clamp(50px, 10vw, 100px); }
.final-cta-section h2 { color: var(--primary-color); }
.final-cta-section p { color: var(--muted-text-color); max-width: 650px; margin-left: auto; margin-right: auto; }
.final-cta-section .primary-cta { background-color: var(--success-color); color: var(--text-on-dark-bg); border-color: var(--success-color); padding: 16px 32px; font-size: 1.1rem; }
.final-cta-section .primary-cta:hover:not(:disabled), .final-cta-section .primary-cta:focus-visible:not(:disabled) { background-color: #218838; border-color: #1e7e34; color: var(--text-on-dark-bg); }
.final-cta-section .small-print { font-size: 0.9rem; opacity: 0.9; margin-top: 1rem; color: var(--muted-text-color); }
.final-cta-section .small-print a { color: var(--secondary-color); text-decoration: underline; }
.final-cta-section .small-print a:hover { color: var(--primary-color); }

/* --- Footer --- */
.footer-section { background-color: #2f3136; color: var(--muted-text-color); padding: 40px 0 30px 0; text-align: center; font-size: 0.9rem; }
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 25px; }
.footer-links a { color: #dee2e6; margin: 0 10px; transition: color var(--transition-speed); }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--accent-color); text-decoration: underline; }
.copyright { margin-top: 1rem; color: #9a9ea3; }
.bmc-container { margin-top: 1rem; }
.bmc-container p { margin-bottom: 0.5rem; color: #ced4da; }
.bmc-button img { height: 50px !important; width: auto !important; border-radius: var(--border-radius); transition: transform var(--transition-speed), box-shadow var(--transition-speed); }
.bmc-button:hover img, .bmc-button:focus-visible img { transform: scale(1.05); box-shadow: 0 4px 12px rgba(240, 173, 78, 0.3); }

/* --- Responsive Adjustments --- */
@media (max-width: 992px) { /* Tablet and below: Mobile Menu */
    .menu-toggle { display: block; }
    .nav-menu-list {
        display: none; position: absolute; top: var(--nav-height); left: 0; width: 100%;
        background-color: var(--nav-bg-color); flex-direction: column; padding: 1rem 0;
        border-top: 1px solid var(--border-color); box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transform: translateY(-10px); opacity: 0; transition: transform 0.3s ease, opacity 0.3s ease;
        pointer-events: none;
    }
    .nav-menu-list.mobile-menu-active { display: flex; transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-menu-list li { width: 100%; text-align: center; }
    .nav-link { padding: 15px 20px; width: 100%; }
    .nav-cta { margin: 10px auto; display: inline-block; width: auto; }
    .intro-content { flex-direction: column; text-align: center; }
    .intro-graphic { margin: 1rem auto 0 auto; }
}

@media (max-width: 768px) { /* Smaller tablets */
    body { font-size: 1rem; }
    .cta-button { padding: 12px 24px; font-size: 1rem; }
    .footer-links { flex-wrap: wrap; justify-content: center; gap: 10px 15px; }
    .footer-links a { margin: 0; }
    #quiz-interface { min-height: auto; }
    .quiz-nav-btn { padding: 10px 18px; font-size: 0.95rem; }
    .results-gauge-container { width: 140px; height: 140px; }
    .gauge-outer { width: 140px; height: 140px; padding: 8px; }
    .gauge-inner { width: 124px; height: 124px; }
    .gauge-data { font-size: 1.8rem; }
    .gauge-svg { width: 140px; height: 140px; }
    #gauge-circle { r: 62; stroke-width: 8; stroke-dasharray: 389.5; stroke-dashoffset: 389.5;} /* Recalculated for r=62 */
}
@media (max-width: 480px) { /* Mobile phones */
    .container { padding: 0 15px; }
    .hero-section .cta-group, .final-cta-section .cta-button { width: 90%; margin-left: auto; margin-right: auto; }
    .hero-section .cta-group { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
    .hero-section .cta-group .cta-button { margin: 0; }
    .final-cta-section .cta-button { display: flex; }
    #options-container button { padding: 14px 12px 14px 40px; }
    .results-actions { flex-direction: column; }
    .results-actions .cta-button { width: 100%; margin: 0 0 10px 0; }
    .quiz-navigation { padding: 0; }
}