/* Import Google Fonts for a kid-friendly, academic look */
@import url('https://fonts.googleapis.com/css2?family=Bangers&family=Open+Sans:wght@400;700&display=swap');

:root {
    --color-main: #2C3E50; /* Dark Blue/Professional */
    --color-primary: #3498DB; /* Bright Blue/Kids */
    --color-secondary: #2ECC71; /* Green/Success */
    --color-accent: #F1C40F; /* Yellow/Fun */
    --color-bg: #ECF0F1; /* Light Gray */

    /* Certificate Colors */
    --cert-beginner: #FFD700; /* Gold */
    --cert-intermediate: #C0C0C0; /* Silver */
    --cert-pro: #CD7F32; /* Bronze */
}

body {
    font-family: 'Open Sans', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-main);
    margin: 0;
    padding: 0;
}

/* --- Header & Title --- */
.academy-header {
    background-color: var(--color-main);
    color: white;
    padding: 40px 20px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border-bottom: 5px solid var(--color-primary);
}

.academy-header h1 {
    font-family: 'Bangers', cursive;
    font-size: 3.5rem;
    margin: 0;
    color: var(--color-accent);
    letter-spacing: 2px;
}

.academy-header h2 {
    font-size: 1.5rem;
    margin-top: 5px;
    font-weight: 400;
}

/* --- Course Index Layout --- */
.course-index {
    max-width: 1000px;
    margin: 30px auto;
    padding: 0 20px;
}

.certificate-track {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-left: 10px solid var(--color-primary);
}

.track-title {
    font-family: 'Bangers', cursive;
    font-size: 2rem;
    margin-top: 0;
    border-bottom: 2px dashed #eee;
    padding-bottom: 10px;
}

.beginner-color { color: var(--cert-beginner); }
.intermediate-color { color: var(--cert-intermediate); }
.pro-color { color: var(--cert-pro); }

.lesson-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.lesson-card {
    background-color: var(--color-primary);
    color: white;
    padding: 15px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    flex-grow: 1;
    min-width: 150px;
    text-align: center;
    transition: transform 0.2s, background-color 0.2s;
}

.lesson-card:hover:not(.locked) {
    background-color: #3f51b5;
    transform: translateY(-3px);
}

.lesson-card.locked {
    background-color: #BDC3C7; /* Grayed out */
    cursor: not-allowed;
    position: relative;
}

.lesson-card.locked::after {
    content: '🔒';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    opacity: 0.8;
}

.track-status {
    font-weight: 700;
    color: var(--color-main);
}

.cert-btn {
    background-color: var(--color-secondary);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.1rem;
    margin-top: 15px;
}

/* --- Certificate Modal --- */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.certificate-box {
    background: white;
    width: 90%;
    max-width: 700px;
    min-height: 450px;
    padding: 40px;
    border: 15px double var(--color-accent);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    text-align: center;
    border-radius: 10px;
    font-family: 'Open Sans', sans-serif;
}

.cert-header {
    font-family: 'Bangers', cursive;
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.cert-level {
    font-size: 2.5rem;
    margin: 10px 0;
    text-transform: uppercase;
    font-weight: 700;
}

.cert-name {
    font-family: cursive;
    font-size: 3.5rem;
    color: var(--color-main);
    border-bottom: 4px solid var(--color-main);
    display: inline-block;
    padding: 0 30px;
    margin: 10px 0 20px 0;
}

.cert-footer {
    margin-top: 30px;
    font-size: 0.9rem;
    color: #888;
}

.hidden { display: none !important; }

/* Lesson Page Styling (Included for consistency) */
.lesson-page-container {
    max-width: 800px;
    margin: 30px auto;
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.lesson-title {
    color: var(--color-primary);
    font-family: 'Bangers', cursive;
    font-size: 2.5rem;
}

.game-area {
    min-height: 250px;
    border: 3px dashed var(--color-accent);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.game-feedback {
    min-height: 20px;
    font-weight: bold;
    color: red;
}

.game-button {
    background-color: var(--color-secondary);
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin: 5px;
}
.game-button:hover { background-color: #27AE60; }
.game-button:active { transform: translateY(2px); }

/* Puzzle specific styles */
.robot-path {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.robot-path-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
    margin: 15px 0;
}
.path-tile {
    width: 60px;
    height: 60px;
    background: #eee;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    border: 1px solid #ccc;
    border-radius: 5px;
}
.path-tile.start { background: #A9DFBF; }
.path-tile.end { background: #E74C3C; }
.path-tile.path { background: var(--color-accent); }