:root {
    --primary-color: #f68423; 
    --accent-color: #343a40; 
    --secondary-color: #02B3E4;
    --neutral-light: #ffffff; 
    --neutral-bg: #f8f9fa; 
    --neutral-text: #212529; 

    --navbar-height: 60px;
}

body {
    background-color: var(--neutral-bg);
    font-family: 'Inter', 'Roboto', sans-serif;
    color: var(--neutral-text);
    padding-top: var(--navbar-height);
    line-height: 1.6;
    font-size: 0.85rem;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 800; 
    color: var(--neutral-text);
}

h1 {
    font-size: 2.1rem;
}
h2 {
    font-size: 1.7rem;
}
h3 {
    font-size: 1.4rem;
}

.navbar-custom {
    background-color: var(--neutral-light);
    border-bottom: 1px solid var(--neutral-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

    .navbar-custom .navbar-brand {
        color: var(--primary-color) !important;
        font-size: 1.25rem; 
        font-weight: 900;
    }

    .navbar-custom .nav-link {
        color: var(--neutral-text);
        font-weight: 600;
        transition: all 0.2s ease;
        border-bottom: 3px solid transparent;
    }

        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: var(--primary-color) !important;
            border-bottom-color: var(--primary-color);
        }

.main-content {
    padding-top: 1.5rem;
}



.btn-primary, .btn-success.try-it-button {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transition: all 0.2s ease-in-out;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(246, 132, 35, 0.3);
}

    .btn-primary:hover, .btn-success.try-it-button:hover {
        background-color: #e57d19;
        border-color: #e57d19;
        transform: translateY(-1px);
        box-shadow: 0 6px 8px rgba(246, 132, 35, 0.4);
    }


.btn-outline-secondary {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

    .btn-outline-secondary:hover {
        background-color: var(--accent-color);
        color: white;
        border-color: var(--accent-color);
    }


.card {
    border: none;
    border-radius: 0.75rem;
    background-color: var(--neutral-light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.3s ease;
}

    .card:hover {
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    }

.progress-bar {
    background-color: var(--accent-color) !important;
}

.card.dashboard-card {
    border-radius: 1rem;
    color: white;
    box-shadow: 0 6px 18px rgba(0,0,0,0.1);
}

    .card.dashboard-card i {
        opacity: 0.5;
    }

    .card.dashboard-card:nth-child(1) {
        background-color: var(--primary-color);
    }

    .card.dashboard-card:nth-child(2) {
        background-color: var(--accent-color);
    }

    .card.dashboard-card:nth-child(3) {
        background-color: #6c757d;
    }


.lesson-container {
    display: flex;
    gap: 2rem;
    flex-wrap: nowrap;
}

.lesson-sidebar {
    width: 300px;
    flex-shrink: 0;
    background-color: var(--neutral-light);
    padding: 1.5rem;
    position: sticky;
    top: calc(var(--navbar-height) + 1rem);
    height: fit-content;
    max-height: calc(100vh - var(--navbar-height) - 2rem);
    overflow-y: auto;
    border-radius: 0.75rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.lesson-main-content {
    flex-grow: 1;
    min-width: 0;
}

.lesson-content-panel {
    background-color: var(--neutral-light);
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.lesson-link {
    color: var(--neutral-text);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    transition: background-color 0.15s ease, color 0.15s ease;
}

    .lesson-link:hover {
        background-color: var(--neutral-bg);
        color: var(--primary-color);
    }

    .lesson-link.active {
        background-color: var(--primary-color);
        color: white !important;
        font-weight: 600;
    }

        .lesson-link.active i {
            color: white !important;
        }

    .lesson-link i.fa-check-circle.text-success {
        color: #15a092 !important;
    }

.offcanvas-header {
    background-color: var(--primary-color) !important;
    color: white;
}

.modal-header {
    background-color: var(--primary-color) !important;
    color: white;
}

@media (max-width: 992px) {
    body {
        padding-top: 56px;
        font-size: 1rem;
    }

    .lesson-container {
        flex-direction: column;
        gap: 0;
    }

    .lesson-sidebar {
        width: 100%;
        position: relative;
        top: 0;
        max-height: 40vh;
        margin-bottom: 1rem;
        border-right: none;
    }
}

.modern-footer {
    padding: 2.5rem 0;
    margin-top: 3rem;
    background-color: #e9ecef;

    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

    .modern-footer a {
        color: var(--color-text-muted);
        text-decoration: none;
        transition: color 0.2s;
    }

        .modern-footer a:hover {
            color: var(--primary-color);
        }

.footer-contact h5 {
    color: var(--color-text);
    font-size: 1.1rem;
    font-weight: 700;
}

.footer-social a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--neutral-light);
    color: var(--accent-color);
    font-size: 1.1rem;
    border: 1px solid var(--color-border);
}

    .footer-social a:hover {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }

body.dark-theme .modern-footer {
    background-color: var(--color-surface);
}

    body.dark-theme .modern-footer .footer-social a {
        background-color: var(--color-border);
        color: var(--color-text-muted);
        border-color: var(--color-border);
    }

        body.dark-theme .modern-footer .footer-social a:hover {
            background-color: var(--primary-color);
            color: white;
        }

.btn-google {
    background-color: var(--neutral-light); 
    color: var(--neutral-text); 
    border: 1px solid #ced4da;
    font-weight: 500;
    transition: all 0.15s ease;
    box-shadow: 0 1px 1px 0 rgba(0,0,0,0.05);
}

    .btn-google:hover {
        background-color: #f4f4f4; 
        border-color: #adb5bd;
        color: var(--neutral-text);
        box-shadow: 0 2px 4px 0 rgba(0,0,0,0.1);
    }

    .btn-google .fa-google {
        color: #4285F4;
        font-size: 1.15rem;
    }

/* ... (Existing styles remain above this point) ... */

/* --- Code Snippet Styling (ChatGPT/VS Code Theme Override) --- */

/* Targets the <code> tag when it is NOT inside a <pre> block (i.e., inline code) */
:not(pre) > code {
    /* Subtle Gray Background for Light Mode (ChatGPT/Gemini look) */
    background-color: #eeeeee !important;
    /* Darker text for contrast */
    color: #212529 !important;
    /* 🚀 FIX: Use Cascadia Code (must be installed locally or loaded via CSS) */
    font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace !important;
    padding: 0.15em 0.3em;
    border-radius: 6px;
    font-size: 1em; /* Slightly smaller than surrounding text */
    white-space: nowrap; /* Prevents inline code from wrapping awkwardly */
}

code {
    font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace !important;
}

pre[class*=language-]:after, pre[class*=language-]:before {
    content: '';
    display: block;
    border-radius: 5px;
    position: absolute;
    bottom: .75em;
    left: .18em;
    width: 40%;
    height: 20%;
    max-height: 13em;
    box-shadow: unset !important;
    -webkit-transform: rotate(-2deg);
    -moz-transform: rotate(-2deg);
    -ms-transform: rotate(-2deg);
    -o-transform: rotate(-2deg);
    transform: rotate(-2deg);
}

/*pre[class*=language-]:after, pre[class*=language-]:before {
    position: relative;
    z-index: 1;
    border-radius: 5px;
    border: 1px solid #fbf2f2;
    border-left: 9px solid #b7b7b7;
     box-shadow: -1px 0 0 0 #358ccb, 0 0 0 1px #dfdfdf; 
    background-color: #fdfdfd;
    background-image: linear-gradient(transparent 50%, rgba(69, 142, 209, .04) 50%);
    background-size: 3em 3em;
    background-origin: content-box;
    background-attachment: local;
    padding-bottom: 20px;
}*/

pre[class*=language-] > code {
    position: relative;
    z-index: 1;
    border-radius: 5px;
    border: 1px solid #fbf2f2;
    border-left: 9px solid #b7b7b7;
    box-shadow: unset !important;
    background-color: #fdfdfd;
    background-image: linear-gradient(transparent 50%, rgba(69, 142, 209, .04) 50%);
    background-size: 3em 3em;
    background-origin: content-box;
    background-attachment: local;
    padding-bottom: 20px;
}