@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300;400;600&family=Nunito:wght@400;700&display=swap');

:root {
    /* Kid-Friendly Palette */
    --color-primary: #4CACBC;    /* Teal Blue */
    --color-primary-dark: #2E8694;
    --color-secondary: #FFB100;  /* Sunny Yellow/Orange */
    --color-secondary-dark: #E59F00;
    --color-accent: #FF6B6B;     /* Soft Red/Pink */
    --color-success: #6BCB77;    /* Grass Green */
    --color-background: #F0F8FF; /* Alice Blue */
    --color-card-bg: #FFFFFF;
    --color-text: #2D3436;
    --color-text-light: #636E72;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    
    /* Layout */
    --border-radius: 20px;
    --container-width: 800px;
    --shadow: 0 10px 25px rgba(0,0,0,0.08);
    --shadow-hover: 0 15px 35px rgba(0,0,0,0.12);
}

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

body {
    font-family: 'Nunito', sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Fredoka', sans-serif;
    color: var(--color-text);
}

/* Animations */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

@keyframes popIn {
    0% { transform: scale(0.9); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Base Layout */
#app {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    animation: slideUp 0.5s ease-out;
}

.logo {
    font-size: 2.5rem;
    color: var(--color-primary);
    text-shadow: 2px 2px 0px rgba(0,0,0,0.1);
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

/* Views */
.view {
    display: none;
    animation: popIn 0.4s ease-out;
}

.view.active {
    display: block;
}

/* Home View - Cards */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.subject-card {
    background: var(--color-card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 3px solid transparent;
}

.subject-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-secondary);
}

.subject-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.subject-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary-dark);
}

/* Quiz View */
.quiz-container {
    background: var(--color-card-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    color: var(--color-text-light);
}

.question-text {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.4;
    color: var(--color-text);
}

.options-grid {
    display: grid;
    gap: var(--spacing-sm);
}

.option-btn {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    padding: var(--spacing-md);
    border-radius: 12px;
    font-family: inherit;
    font-size: 1.1rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-text);
}

.option-btn:hover {
    background: white;
    border-color: var(--color-primary);
    transform: translateX(5px);
}

.option-btn.selected {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

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

.option-btn.wrong {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

/* Feedback Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(4px);
}

.modal-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.feedback-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    transform: scale(0.8);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.visible .feedback-card {
    transform: scale(1);
}

.feedback-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    display: block;
    animation: float 3s ease-in-out infinite;
}

.feedback-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feedback-text {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.btn {
    background: var(--color-secondary);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-family: 'Fredoka', sans-serif;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 5px 0 var(--color-secondary-dark);
}

.btn:active {
    transform: translateY(5px);
    box-shadow: none;
}

.btn:hover {
    filter: brightness(1.1);
}

/* Results View */
.results-container {
    text-align: center;
    animation: popIn 0.5s ease-out;
}

.score-display {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary);
    margin: var(--spacing-md) 0;
}

.stars-container {
    font-size: 3rem;
    color: #ffd700;
    margin-bottom: var(--spacing-lg);
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Login View Specifics */
.login-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    max-width: 400px;
    margin: 2rem auto;
    box-shadow: var(--shadow);
    border: 4px solid var(--color-primary);
}

.lock-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    display: block;
    animation: popIn 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#passcode-input {
    width: 100%;
    padding: 15px;
    font-size: 1.5rem;
    margin: 1rem 0;
    border: 2px solid #ddd;
    border-radius: 12px;
    text-align: center;
    font-family: 'Fredoka', sans-serif;
    letter-spacing: 2px;
}

#passcode-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.error-text {
    color: var(--color-accent);
    margin-top: 1rem;
    font-weight: bold;
    animation: slideUp 0.3s ease;
}