:root {
    --propaganda-red: #d32f2f;
    --propaganda-red-hover: #b71c1c;
    --sunburst-light: #ffeb3b;
    --sunburst-dark: #fbc02d;
    --ink-black: #1a0f0f;
    --paper-cream: #fff8e1;
    --success: #2e7d32;
    --error: #c62828;
}

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

body {
    font-family: 'Roboto', sans-serif;
    color: var(--ink-black);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 30px 0;
    
    /* Sunburst Background */
    background-color: var(--sunburst-light);
    background-image: repeating-conic-gradient(
      from 0deg, 
      var(--sunburst-light) 0deg 15deg, 
      var(--sunburst-dark) 15deg 30deg
    );
    background-attachment: fixed;
}

/* Vintage Paper Noise Overlay */
.texture-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 100;
    opacity: 0.35;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.app-container {
    width: 100%;
    max-width: 900px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    position: relative;
    z-index: 10;
}

h1, h2, .chapter-number, .score-text, .tag, .btn, .back-btn {
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.quiz-header {
    text-align: center;
    margin-bottom: 40px;
    background: var(--paper-cream);
    padding: 20px;
    border: 4px solid var(--ink-black);
    box-shadow: 8px 8px 0px var(--propaganda-red);
    transform: rotate(-1deg);
}

.quiz-header h1 {
    font-size: 3.5rem;
    color: var(--propaganda-red);
    text-shadow: 2px 2px 0px var(--ink-black);
    margin-bottom: 5px;
}

.quiz-header p {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--ink-black);
}

/* TOC View */
.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 25px;
}

.chapter-card {
    background: var(--paper-cream);
    border: 3px solid var(--ink-black);
    padding: 20px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 6px 6px 0px var(--ink-black);
    transition: all 0.1s ease;
}

.chapter-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0px var(--propaganda-red);
}

.chapter-card:active {
    transform: translate(3px, 3px);
    box-shadow: 3px 3px 0px var(--ink-black);
}

.chapter-number {
    font-size: 1.2rem;
    color: var(--propaganda-red);
    margin-bottom: 10px;
    border-bottom: 2px solid var(--ink-black);
    padding-bottom: 5px;
}

.chapter-title {
    font-size: 1.1rem;
    font-weight: 900;
    line-height: 1.3;
    flex-grow: 1;
    margin-bottom: 15px;
    color: var(--ink-black);
}

.score-badge {
    align-self: flex-start;
    background: var(--ink-black);
    color: var(--paper-cream);
    padding: 5px 10px;
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.score-badge.empty {
    background: transparent;
    color: var(--ink-black);
    border: 2px solid var(--ink-black);
}

/* Panels */
.propaganda-panel {
    background: var(--paper-cream);
    border: 4px solid var(--ink-black);
    padding: 40px;
    box-shadow: 10px 10px 0px var(--ink-black);
    max-width: 700px;
    margin: 0 auto;
    width: 100%;
}

.back-btn {
    background: var(--ink-black);
    color: var(--paper-cream);
    border: none;
    font-size: 1.2rem;
    padding: 8px 15px;
    cursor: pointer;
    margin-bottom: 30px;
    display: inline-block;
    transition: transform 0.1s;
}

.back-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0px var(--propaganda-red);
}

.progress-container {
    width: 100%;
    height: 12px;
    background: #e0e0e0;
    border: 2px solid var(--ink-black);
    margin-bottom: 30px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--propaganda-red);
    border-right: 2px solid var(--ink-black);
    transition: width 0.3s ease;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 1.4rem;
    color: var(--ink-black);
}

.tag {
    background: var(--propaganda-red);
    color: var(--paper-cream);
    padding: 4px 10px;
    border: 2px solid var(--ink-black);
}

.question-text {
    font-size: 1.6rem;
    line-height: 1.3;
    margin-bottom: 30px;
    font-weight: 900;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option-btn {
    background: var(--paper-cream);
    border: 3px solid var(--ink-black);
    color: var(--ink-black);
    padding: 15px 20px;
    font-size: 1.1rem;
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    box-shadow: 4px 4px 0px var(--ink-black);
    transition: all 0.1s ease;
}

.option-btn:hover:not(:disabled) {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--propaganda-red);
}

.option-btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--ink-black);
}

.option-btn.correct {
    background: var(--success);
    color: white;
}

.option-btn.wrong {
    background: var(--propaganda-red);
    color: white;
}

.option-btn:disabled {
    cursor: default;
}

.card-footer {
    margin-top: 30px;
    display: flex;
    justify-content: flex-end;
}

.btn {
    font-size: 1.4rem;
    padding: 12px 25px;
    border: 3px solid var(--ink-black);
    cursor: pointer;
    box-shadow: 5px 5px 0px var(--ink-black);
    transition: all 0.1s ease;
}

.btn:active {
    transform: translate(3px, 3px);
    box-shadow: 2px 2px 0px var(--ink-black);
}

.primary-btn {
    background: var(--propaganda-red);
    color: var(--paper-cream);
}

.primary-btn:hover {
    background: var(--propaganda-red-hover);
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0px var(--ink-black);
}

.secondary-btn {
    background: var(--paper-cream);
    color: var(--ink-black);
}

.secondary-btn:hover {
    background: #f5f5f5;
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0px var(--propaganda-red);
}

.hidden {
    display: none !important;
}

.result-card {
    text-align: center;
}

.result-card h2 {
    font-size: 3rem;
    color: var(--propaganda-red);
    text-shadow: 2px 2px 0px var(--ink-black);
    margin-bottom: 25px;
}

.score-display {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    border: 5px solid var(--ink-black);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    background: var(--propaganda-red);
    color: var(--paper-cream);
    box-shadow: 8px 8px 0px var(--ink-black);
}

.score-text {
    font-size: 4rem;
}

.score-message {
    font-weight: 900;
    font-size: 1.3rem;
    margin-bottom: 40px;
}

.result-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.explanation-box {
    margin-top: 15px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--paper-cream);
    padding: 15px;
    background: var(--ink-black);
    border: 3px solid var(--propaganda-red);
    box-shadow: 5px 5px 0px var(--propaganda-red);
}

/* Corner Graphics */
.corner-graphic {
    position: fixed;
    bottom: 0;
    width: 25vw;
    min-width: 250px;
    max-width: 400px;
    z-index: 1; /* Below the main content so it doesn't block clicks */
    mix-blend-mode: multiply; /* Removes the white background */
    pointer-events: none;
    opacity: 0.9;
}

.corner-left {
    left: 0;
}

.corner-right {
    right: 0;
}

/* Authentication Styles */
.auth-card {
    text-align: center;
}

.auth-card h2 {
    font-size: 3rem;
    color: var(--propaganda-red);
    text-shadow: 2px 2px 0px var(--ink-black);
    margin-bottom: 20px;
}

.auth-forms {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.auth-forms form {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 400px;
    gap: 15px;
    padding: 20px;
    background: #fff;
    border: 3px solid var(--ink-black);
    box-shadow: 5px 5px 0px var(--ink-black);
}

.auth-forms h3 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    color: var(--ink-black);
    margin-bottom: 10px;
}

.auth-forms input {
    font-family: 'Roboto', sans-serif;
    font-size: 1.1rem;
    padding: 12px;
    border: 2px solid var(--ink-black);
    background: var(--paper-cream);
    color: var(--ink-black);
    font-weight: bold;
}

.auth-forms input:focus {
    outline: none;
    border-color: var(--propaganda-red);
    box-shadow: inset 2px 2px 0px rgba(0,0,0,0.1);
}

.divider {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    color: var(--ink-black);
    position: relative;
    width: 100%;
    max-width: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    border-bottom: 3px solid var(--ink-black);
    margin: 0 15px;
}

.error-msg {
    color: var(--error);
    font-weight: bold;
    font-size: 0.9rem;
    margin-top: 5px;
}

/* User Info Header */
.user-info {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
}

#user-greeting {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    color: var(--ink-black);
}

.btn-small {
    font-size: 1rem;
    padding: 5px 15px;
    box-shadow: 3px 3px 0px var(--ink-black);
}