/**
 * Number Line Leap - Frog Pond Theme
 *
 * Hop across a sunny lily pond! Cool pond-water blues, lily-pad and frog
 * greens, cattail browns, and a warm sunny accent give this fractions-on-a-
 * number-line game a calm, splashy pond feel.
 * Builds on top of kid-friendly-theme.css
 *
 * Color Palette:
 * - Pond Blue:    #2E86C1 (number line, water gradients, score accents)
 * - Lily Green:   #5FB849 (easy card, success states, frog stems)
 * - Frog Green:   #2E7D32 (titles, borders, primary buttons, deep accents)
 * - Cattail Brown:#7A5230 (tick marks, secondary borders, earthy trim)
 * - Sunny Yellow: #F4C542 (highlights, candidate spots, accent buttons)
 */

body {
    background: linear-gradient(135deg, #CDEFF6 0%, #A7E0EC 45%, #7FCBE0 100%);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    font-family: 'Nunito', sans-serif;
}

.game-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.kid-game-card {
    background: linear-gradient(135deg, #F4FFF6 0%, #DDF6E3 100%);
    border: 4px solid #2E7D32;
    border-radius: 25px;
    padding: 40px;
    max-width: 820px;
    width: 100%;
    box-shadow: 0 8px 30px rgba(46, 125, 50, 0.3);
}

/* Mascot */
.pond-mascot {
    font-size: 5rem;
    text-align: center;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

.pond-mascot.excited {
    animation: bounce 0.6s ease-in-out 3;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-22px); }
}

/* Title + intro */
.kid-friendly-title {
    color: #2E7D32;
    text-align: center;
    margin: 20px 0;
}

.kid-friendly-body {
    color: #2C3E50;
    text-align: center;
    font-size: 1.3rem;
    margin-bottom: 30px;
}

/* Difficulty Selection */
.difficulty-selection {
    margin: 40px 0;
}

.section-title {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: #2E7D32;
    text-align: center;
    margin-bottom: 25px;
}

.difficulty-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.kid-difficulty-card {
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid #2E7D32;
    border-radius: 18px;
    padding: 22px;
}

.kid-difficulty-card:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 8px 25px rgba(46, 134, 193, 0.4);
}

.kid-difficulty-card.easy {
    background: linear-gradient(135deg, #C6EFB6 0%, #95D879 100%);
    border-color: #5FB849;
}

.kid-difficulty-card.medium {
    background: linear-gradient(135deg, #B6E3F4 0%, #74C2E3 100%);
    border-color: #2E86C1;
}

.kid-difficulty-card.hard {
    background: linear-gradient(135deg, #FCE6A6 0%, #F4C542 100%);
    border-color: #D9A521;
}

.difficulty-title {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #1F3A2A;
    margin-bottom: 10px;
}

.difficulty-description {
    font-size: 1rem;
    color: #34495E;
    margin-bottom: 8px;
}

.difficulty-example {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: #2C3E50;
    background: rgba(255, 255, 255, 0.6);
    padding: 5px 10px;
    border-radius: 8px;
    margin-top: 10px;
}

/* Practice Mode Section */
.practice-mode-section {
    margin: 30px 0;
}

.practice-mode-card {
    background: linear-gradient(135deg, #B6E3F4 0%, #74C2E3 100%);
    border: 3px solid #2E86C1;
    border-radius: 20px;
    padding: 25px;
    text-align: center;
}

.practice-mode-card h3 {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.6rem;
    color: #1B4F72;
    margin-bottom: 15px;
}

.practice-mode-card p {
    font-size: 1.2rem;
    color: #2C3E50;
    margin-bottom: 20px;
}

/* Game Actions */
.game-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

/* Game Screen header */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.question-counter {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: #2E7D32;
}

.score-display {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #2E86C1;
}

.btn-small {
    padding: 8px 16px;
    font-size: 1rem;
}

/* Progress Bar */
.kid-progress-bar {
    background: rgba(46, 125, 50, 0.18);
    border: 2px solid #2E7D32;
    border-radius: 15px;
    height: 25px;
    margin-bottom: 30px;
    overflow: hidden;
}

.kid-progress-fill {
    background: linear-gradient(90deg, #2E86C1 0%, #5FB849 100%);
    height: 100%;
    transition: width 0.5s ease;
    border-radius: 13px;
}

/* Problem Display */
.problem-display {
    text-align: center;
    margin: 30px 0;
}

.question-text {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: #2E7D32;
    margin-bottom: 12px;
}

.question-hint {
    font-family: 'Nunito', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: #1B4F72;
    background: rgba(244, 197, 66, 0.25);
    border: 2px dashed #D9A521;
    border-radius: 12px;
    padding: 10px 18px;
    display: inline-block;
    margin: 0 auto 20px;
}

/* Number Line */
.number-line-container {
    background: linear-gradient(180deg, #EAF9FF 0%, #CFEFFA 100%);
    border: 4px solid #2E86C1;
    border-radius: 20px;
    padding: 20px 15px;
    margin: 20px auto 10px;
    max-width: 720px;
    box-shadow: 0 4px 15px rgba(46, 134, 193, 0.2);
}

.number-line-svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
}

/* number line parts */
.nl-baseline {
    stroke: #2E86C1;
    stroke-width: 5;
    stroke-linecap: round;
}

.nl-tick {
    stroke: #7A5230;
    stroke-width: 3;
    stroke-linecap: round;
}

.nl-tick-whole {
    stroke: #2E7D32;
    stroke-width: 5;
}

.nl-label {
    font-family: 'Fredoka', 'Nunito', sans-serif;
    font-size: 18px;
    font-weight: 600;
    fill: #1B4F72;
}

.nl-label-whole {
    font-size: 24px;
    font-weight: 700;
    fill: #2E7D32;
}

/* Frog marker */
.nl-frog-stem {
    stroke: #5FB849;
    stroke-width: 4;
    stroke-linecap: round;
}

.nl-frog {
    font-size: 34px;
}

.nl-frog-tag {
    font-weight: 700;
    fill: #2E7D32;
}

/* Lettered candidate spots (place questions) */
.nl-spot-dot {
    fill: #F4C542;
    stroke: #D9A521;
    stroke-width: 3;
}

.nl-spot-letter {
    font-family: 'Fredoka', sans-serif;
    font-size: 22px;
    font-weight: 700;
    fill: #7A5230;
}

/* Answer Choices */
.answer-choices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin: 30px 0;
}

.kid-answer-btn {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: #1F3A2A;
    background: linear-gradient(135deg, #FFFFFF 0%, #E4F7E9 100%);
    border: 3px solid #2E7D32;
    border-radius: 15px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.kid-answer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(46, 134, 193, 0.4);
    background: linear-gradient(135deg, #B6E3F4 0%, #74C2E3 100%);
}

.kid-answer-btn.correct {
    background: linear-gradient(135deg, #C6EFB6 0%, #95D879 100%);
    border-color: #5FB849;
    animation: pulse 0.5s ease-in-out;
}

.kid-answer-btn.incorrect {
    background: linear-gradient(135deg, #F6BBB0 0%, #E8806E 100%);
    border-color: #C0392B;
    animation: shake 0.5s ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Feedback Area */
.feedback-area {
    margin-top: 30px;
    text-align: center;
}

.feedback-message {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    padding: 15px 25px;
    border-radius: 15px;
    display: inline-block;
}

.feedback-message.correct {
    background: linear-gradient(135deg, #C6EFB6 0%, #95D879 100%);
    color: #1F4A22;
    border: 3px solid #5FB849;
}

.feedback-message.incorrect {
    background: linear-gradient(135deg, #F6BBB0 0%, #E8806E 100%);
    color: #6E1E14;
    border: 3px solid #C0392B;
}

/* Results Screen */
.kid-stars {
    font-size: 4rem;
    text-align: center;
    margin: 30px 0;
}

.results-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 25px;
    margin: 40px 0;
}

.result-stat {
    text-align: center;
    background: linear-gradient(135deg, #DDF6E3 0%, #FFFFFF 100%);
    border: 3px solid #2E7D32;
    border-radius: 20px;
    padding: 25px;
}

.stat-value {
    font-family: 'Fredoka', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: #2E86C1;
    margin-bottom: 10px;
}

.stat-label {
    font-family: 'Nunito', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2E7D32;
}

/* Missed Problems Section */
.missed-problems {
    background: linear-gradient(135deg, #EAF9EE 0%, #DDF6E3 100%);
    border: 3px solid #2E7D32;
    border-radius: 20px;
    padding: 30px;
    margin: 30px 0;
    box-shadow: 0 4px 15px rgba(46, 125, 50, 0.15);
}

.missed-title {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: #2E7D32;
    text-align: center;
    margin-bottom: 25px;
}

.missed-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.missed-item {
    background: #FFFFFF;
    border: 2px solid #2E86C1;
    border-radius: 15px;
    padding: 20px;
    text-align: center;
}

.missed-question {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: #2C3E50;
    margin-bottom: 15px;
}

.missed-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 1rem;
}

.your-answer {
    color: #C0392B;
    font-weight: 600;
}

.correct-answer {
    color: #2E7D32;
    font-weight: 600;
}

/* Results Actions */
.results-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 30px;
}

/* Buttons */
.kid-btn {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    padding: 15px 35px;
    border: none;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.kid-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.kid-btn-primary {
    background: linear-gradient(135deg, #2E7D32 0%, #5FB849 100%);
    color: white;
    border: 3px solid #2E7D32;
}

.kid-btn-secondary {
    background: linear-gradient(135deg, #D3D3D3 0%, #A9A9A9 100%);
    color: #2C3E50;
    border: 3px solid #808080;
}

.kid-btn-accent {
    background: linear-gradient(135deg, #2E86C1 0%, #5AA9DC 100%);
    color: white;
    border: 3px solid #1B4F72;
}

/* Utility */
.kid-hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .kid-game-card {
        padding: 25px;
    }

    .pond-mascot {
        font-size: 4rem;
    }

    .kid-friendly-title {
        font-size: 2rem;
    }

    .kid-friendly-body {
        font-size: 1.1rem;
    }

    .difficulty-options {
        grid-template-columns: 1fr;
    }

    .question-text {
        font-size: 1.5rem;
    }

    .number-line-container {
        padding: 15px 8px;
    }

    .answer-choices {
        grid-template-columns: 1fr 1fr;
    }

    .results-summary {
        grid-template-columns: 1fr;
    }

    .stat-value {
        font-size: 2.5rem;
    }

    .missed-items-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .game-content {
        padding: 10px;
    }

    .kid-game-card {
        padding: 18px;
    }

    .pond-mascot {
        font-size: 3rem;
    }

    .question-text {
        font-size: 1.3rem;
    }

    .question-hint {
        font-size: 1rem;
    }

    .kid-answer-btn {
        font-size: 1.3rem;
        padding: 16px;
    }

    .kid-btn {
        font-size: 1rem;
        padding: 12px 25px;
    }
}

/* Very narrow screens (~360px): keep the number line legible */
@media (max-width: 360px) {
    .answer-choices {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .number-line-container {
        padding: 12px 6px;
    }
}