/* ============================================
   Digital Nexus - CSS Stylesheet
   DSF Colour Palette Applied via CSS Custom Properties
   ============================================ */

:root {
    /* DSF Colour Palette */
    --navy: #070F7A;
    --purple: #C243FA;
    --yellow: #F5F404;
    --blue: #0226FA;
    --green: #44FD4E;
    --lime: #A9FD3B;
    --teal: #47FED8;
    --orange: #FD8200;

    /* Neutral Colors */
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #E9ECEF;
    --dark-gray: #495057;
    --text-dark: #212529;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Transitions */
    --transition: all 0.3s ease;
}

/* ============================================
   Global Styles
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-dark);
    background-color: var(--light-gray);
}

.hidden {
    display: none !important;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--navy);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--blue);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--purple);
    text-decoration: underline;
}

/* ============================================
   Container
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ============================================
   Header
   ============================================ */

.header {
    background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    box-shadow: 0 4px 6px rgba(7, 15, 122, 0.1);
}

.header-content {
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.tagline {
    font-size: 1.25rem;
    margin-bottom: 0;
    color: var(--yellow);
    font-weight: 500;
}

/* ============================================
   Progress Tracker
   ============================================ */

.progress-tracker {
    background-color: var(--white);
    padding: var(--spacing-lg) 0;
    border-bottom: 2px solid var(--medium-gray);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.progress-header h2 {
    margin-bottom: 0;
    color: var(--navy);
}

.progress-count {
    background-color: var(--yellow);
    color: var(--navy);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--medium-gray);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--green) 0%, var(--lime) 50%, var(--teal) 100%);
    width: 0%;
    transition: width 0.5s ease;
    border-radius: 10px;
}

/* ============================================
   Main Content
   ============================================ */

.main-content {
    padding: var(--spacing-xl) 0;
}

/* Intro Section */
.intro-section {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--purple);
}

.intro-section h2 {
    color: var(--navy);
}

.intro-section > p {
    font-size: 1.1rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
}

.learning-outcomes {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-top: var(--spacing-lg);
}

.learning-outcomes h3 {
    color: var(--blue);
    margin-bottom: var(--spacing-md);
}

.learning-outcomes ul {
    list-style: none;
    padding-left: 0;
}

.learning-outcomes li {
    padding: var(--spacing-sm) 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-dark);
}

.learning-outcomes li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: bold;
    font-size: 1.25rem;
}

.intro-actions {
    margin-top: var(--spacing-md);
}

/* ============================================
   Badges Section
   ============================================ */

.badges-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--navy);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.badge-card {
    background: var(--white);
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    border-top: 4px solid var(--navy);
    position: relative;
}

.badge-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.badge-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.badge-card h3 {
    color: var(--navy);
    margin-bottom: var(--spacing-sm);
}

.career-link {
    background-color: var(--light-gray);
    padding: var(--spacing-sm);
    border-left: 3px solid var(--blue);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    border-radius: 4px;
}

.career-link strong {
    color: var(--blue);
}

.challenge-description {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.career-prep {
    font-size: 0.92rem;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-gray);
}

.career-prep a {
    font-weight: 700;
}

.completion-status {
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--medium-gray);
}

.status-uncompleted,
.status-completed {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-uncompleted {
    background-color: var(--medium-gray);
    color: var(--dark-gray);
}

.status-completed {
    background-color: var(--green);
    color: var(--navy);
}

/* Badge Type Colors */
.badge-card:nth-child(1) { border-top-color: var(--green); }
.badge-card:nth-child(2) { border-top-color: var(--lime); }
.badge-card:nth-child(3) { border-top-color: var(--teal); }
.badge-card:nth-child(4) { border-top-color: var(--green); }
.badge-card:nth-child(5) { border-top-color: var(--lime); }
.badge-card:nth-child(6) { border-top-color: var(--teal); }

.explorer-badge { color: var(--green); }
.builder-badge { color: var(--lime); }
.innovator-badge { color: var(--teal); }

/* ============================================
   Digital Futures Section
   ============================================ */

.digital-futures-section {
    margin-top: var(--spacing-xl);
}

.level-check-section,
.resources-section,
.feedback-wall-section {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.level-result {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-left: 4px solid var(--green);
    background: var(--light-gray);
    border-radius: 8px;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.resource-card {
    display: block;
    background: var(--light-gray);
    border-left: 4px solid var(--blue);
    padding: var(--spacing-md);
    border-radius: 8px;
    font-weight: 600;
    color: var(--navy);
}

.resource-card:hover {
    background: #edf1ff;
}

.feedback-wall-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feedback-tile {
    text-align: left;
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    background: var(--white);
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.feedback-tile span {
    color: var(--dark-gray);
    font-size: 0.92rem;
}

.empty-feedback {
    color: var(--dark-gray);
}

.digital-futures-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.futures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.futures-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    border-top: 4px solid;
}

.futures-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.level-badge {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.futures-card h3 {
    margin-bottom: var(--spacing-md);
}

.futures-card p {
    color: var(--dark-gray);
    margin-bottom: 0;
}

.explorer-level {
    border-top-color: var(--green);
}

.explorer-level h3 {
    color: var(--green);
}

.builder-level {
    border-top-color: var(--lime);
}

.builder-level h3 {
    color: var(--lime);
}

.innovator-level {
    border-top-color: var(--teal);
}

.innovator-level h3 {
    color: var(--teal);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue) 0%, var(--purple) 100%);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(2, 38, 250, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--green) 0%, var(--lime) 100%);
    color: var(--navy);
    font-weight: 700;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(68, 253, 78, 0.3);
}

.btn-secondary {
    background-color: var(--medium-gray);
    color: var(--navy);
}

.btn-secondary:hover {
    background-color: var(--dark-gray);
    color: var(--white);
}

/* ============================================
   Modals
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--white);
    border-radius: 12px;
    padding: var(--spacing-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--dark-gray);
    cursor: pointer;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--navy);
    background-color: var(--light-gray);
    border-radius: 50%;
}

/* Challenge Modal Specific */
#challenge-body {
    padding-top: var(--spacing-lg);
}

.challenge-content h2 {
    color: var(--blue);
    margin-bottom: var(--spacing-lg);
}

.challenge-timer {
    background: linear-gradient(135deg, var(--orange) 0%, var(--yellow) 100%);
    color: var(--navy);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    text-align: center;
}

.challenge-instructions {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--blue);
}

.challenge-task {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
    min-height: 200px;
}

.challenge-task h3 {
    color: var(--navy);
}

/* Completion Modal Specific */
.modal-completion {
    text-align: center;
    max-width: 500px;
}

.completion-content {
    padding-top: var(--spacing-xl);
}

.badge-earned-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-lg);
}

.completion-content h2 {
    color: var(--green);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.completion-message {
    font-size: 1.1rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
}

.completion-stats {
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-lg);
    border: 2px solid var(--green);
}

.completion-stats p {
    margin-bottom: 0;
    font-weight: 600;
    color: var(--navy);
}

.completion-review {
    text-align: left;
    max-height: 220px;
    overflow-y: auto;
    background: var(--light-gray);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.review-item {
    border-bottom: 1px solid var(--medium-gray);
    padding: var(--spacing-sm) 0;
}

.review-item:last-child {
    border-bottom: none;
}

.review-item p {
    margin-bottom: 0.4rem;
    color: var(--dark-gray);
}

/* Evaluation Modal Specific */
.modal-evaluation {
    max-width: 700px;
}

.evaluation-content h2 {
    color: var(--purple);
    margin-bottom: var(--spacing-md);
}

.evaluation-content > p {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--navy);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--medium-gray);
    border-radius: 6px;
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
    color: var(--text-dark);
}

.glossary-list {
    padding-left: 1.1rem;
}

.glossary-list li {
    margin-bottom: var(--spacing-sm);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(2, 38, 250, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ============================================
   Footer
   ============================================ */

footer {
    background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
    color: var(--white);
    margin-top: var(--spacing-xl);
}

.footer {
    padding: var(--spacing-xl) 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    color: var(--yellow);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--yellow);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--white);
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    :root {
        --font-size-base: 14px;
    }

    .container {
        padding: var(--spacing-md);
    }

    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .header {
        padding: var(--spacing-lg) 0;
    }

    .logo {
        font-size: 1.8rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .badges-grid {
        grid-template-columns: 1fr;
    }

    .progress-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .progress-count {
        margin-top: var(--spacing-sm);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
        padding: var(--spacing-lg);
    }

    .modal-close {
        top: var(--spacing-md);
        right: var(--spacing-md);
    }

    .intro-section {
        padding: var(--spacing-lg);
    }

    .level-check-section,
    .resources-section,
    .feedback-wall-section {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1rem; }

    .logo {
        font-size: 1.5rem;
    }

    .badge-icon {
        font-size: 2.5rem;
    }

    .level-badge {
        font-size: 2rem;
    }

    .badge-earned-icon {
        font-size: 3rem;
    }

    .futures-grid {
        gap: var(--spacing-md);
    }

    .modal-content {
        padding: var(--spacing-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: more) {
    .btn-primary {
        border: 2px solid var(--blue);
    }

    .btn-success {
        border: 2px solid var(--navy);
    }

    .badge-card {
        border: 2px solid var(--navy);
    }
}

/* Print styles */
@media print {
    body {
        background: white;
    }

    .header,
    .progress-tracker,
    .modal,
    footer {
        display: none;
    }

    .modal-content {
        box-shadow: none;
        max-width: 100%;
    }

    a {
        color: inherit;
        text-decoration: underline;
    }
}

/* Full-Screen Challenge Modifications */
body.no-scroll {
    overflow: hidden;
}

.modal-challenge-full {
    width: 100vw !important;
    height: 100vh !important;
    max-width: none !important;
    max-height: none !important;
    border-radius: 0 !important;
    display: flex;
    flex-direction: column;
}

.modal-challenge-full #challenge-body {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

/* Landscape Layout inside Challenge Modal */
.challenge-landscape-layout {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-xl);
    height: 100%;
}

.challenge-landscape-left {
    flex: 1;
    overflow-y: auto;
    padding-right: var(--spacing-md);
}

.challenge-landscape-right {
    flex: 1;
    overflow-y: auto;
    background: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border-left: 4px solid var(--blue);
}

@media (max-width: 768px) {
    .challenge-landscape-layout {
        flex-direction: column;
    }
}