:root {
    --background-color: #ffffff;
    --text-color: #333333;
    --link-color: #0056b3;
    --link-hover-decoration: none;
    --focus-outline-color: #FFC107;
    --muted-text-color: #5c677d;
    --switch-icon-active-light: #f0db4f;
    --accent-highlight-bg: #0a58ca;
    --accent-highlight-color: #ffffff;
    --form-control-bg: #ffffff;
    --form-control-color: #212529;
    --form-control-border: #ced4da;
    --btn-primary-bg: #0d6efd;
    --btn-primary-color: #ffffff;
    --btn-primary-hover-bg: #0b5ed7;
    --alert-warning-bg: #fff3cd;
    --alert-warning-color: #664d03;
    --alert-warning-border: #ffecb5;
    --clear-btn-color: #dc3545;
    --navbar-bg: #343a40;
    --navbar-link-color: #ffffff;
    --tsactive-bg: #f8f9fa;
    --tsactive-color: #212529;
    --switch-track-bg: #E0E0E0;
    --switch-thumb-bg: #2F48CC;
    --switch-icon-inactive: #8f8f8f;
}

html[data-theme="dark"] {
    --background-color: #282c34;
    --text-color: #f8f8f2;
    --link-color: #90cfff;
    --link-hover-decoration: underline;
    --muted-text-color: #d1d1d1;
    --switch-icon-active-dark: #61dafb;
    --form-control-bg: #3b4049;
    --form-control-color: #f8f8f2;
    --form-control-border: #5c636a;
    --btn-primary-hover-bg: #3385fd;
    --alert-warning-bg: #4d3c0c;
    --alert-warning-color: #ffda6a;
    --alert-warning-border: #856404;
    --clear-btn-color: #ff8a8a;
    --navbar-bg: #1a1e24;
    --footer-bg: #1a1e24;
    --tsactive-bg: #343a40;
    --tsactive-color: #ffffff;
    --switch-track-bg: #333333;
    --switch-thumb-bg: #526be9;
    --switch-icon-inactive: #a0a0a0;
}

html, body {
    font-size: 18px;
    line-height: 1.6;
}

body {
    padding-top: 50px;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.tsp {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 26px;
    line-height: 1.4; 
}
.privacy-policy-page ul,
.privacy-policy-page ol,
.tsp ul,
.tsp ol,
.text-start ul,
.text-start ol {
    font-size: 26px;
    line-height: 1.4;
    margin-left: 2.2em;
    margin-bottom: 1em;
}
.privacy-policy-page li,
.tsp ul li,
.tsp ol li,
.text-start ul li,
.text-start ol li {
    font-size: 26px;
    line-height: 1.4;
}



.sample-links-list a {
    color: var(--link-color);
    text-decoration: underline;
    outline-offset: 2px;
    font-weight: 600;
    transition: color 0.2s, text-decoration 0.2s;
}
.sample-links-list a:hover,
.sample-links-list a:focus-visible {
    color: var(--btn-primary-bg);
    text-decoration: underline;
}



.talking-scores a,
.score-page a {
    color: var(--link-color);
    text-decoration: underline;
    outline-offset: 2px;
}

.talking-scores a:hover,
.score-page a:hover {
    text-decoration: var(--link-hover-decoration);
}

*:focus-visible {
    outline: 3px solid var(--focus-outline-color) !important;
    outline-offset: 2px;
    box-shadow: none !important;
}

.skip-link {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    white-space: nowrap;
}

.skip-link:focus {
    clip: auto;
    clip-path: none;
    width: auto;
    height: auto;
    white-space: normal;
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    padding: 1rem;
    background-color: var(--accent-highlight-bg);
    color: var(--accent-highlight-color);
    font-weight: bold;
    z-index: 9999;
    text-decoration: none;
}

.talking-scores {
    padding: 40px 15px;
    text-align: center;
}

.text-start {
    padding: 40px 15px;
    text-align: left;
}

.footer {
    background-color: var(--footer-bg) !important;
}

.navbar {
    background-color: var(--navbar-bg) !important;
}

.navbar-dark .navbar-nav .nav-link {
    color: var(--navbar-link-color);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    transition: background-color 0.2s ease-in-out, color 0.2s ease-in-out;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus-visible {
    color: var(--accent-highlight-color);
    background-color: var(--accent-highlight-bg);
}

li.tsactive {
    background-color: transparent !important;
    padding: 0;
}

.tsactive a.nav-link {
    background-color: var(--tsactive-bg) !important;
    color: var(--tsactive-color) !important;
}

.tsactive a.nav-link:hover,
.tsactive a.nav-link:focus-visible {
    background-color: var(--accent-highlight-bg) !important;
    color: var(--accent-highlight-color) !important;
}

#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    width: 80px;
    height: 44px;
    border-radius: 22px;
    background-color: var(--switch-track-bg);
    transition: background-color 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}

#theme-toggle::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 6px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--switch-thumb-bg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    z-index: 1;
}

html[data-theme="dark"] #theme-toggle::before {
    transform: translateX(36px);
}

#theme-toggle .sun-icon,
#theme-toggle .moon-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    transition: color 0.3s ease;
    z-index: 2;
}
#theme-toggle .sun-icon { left: 10px; }
#theme-toggle .moon-icon { right: 10px; }


html[data-theme="light"] #theme-toggle .sun-icon { color: var(--switch-icon-active-light); }
html[data-theme="light"] #theme-toggle .moon-icon { color: var(--switch-icon-inactive); }
html[data-theme="dark"] #theme-toggle .sun-icon { color: var(--switch-icon-inactive); }
html[data-theme="dark"] #theme-toggle .moon-icon { color: var(--switch-icon-active-dark); }

.form-control,
.score-page select {
    background-color: var(--form-control-bg);
    color: var(--form-control-color);
    border: 1px solid var(--form-control-border);
}

.score-page select option {
    background-color: var(--background-color);
    color: var(--text-color);
}

.form-control:focus,
.score-page select:focus {
    background-color: var(--form-control-bg);
    color: var(--form-control-color);
    border-color: var(--form-control-border);
    box-shadow: none; 
}

.btn.btn-primary {
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-color);
    border-color: var(--btn-primary-bg);
}

.btn.btn-primary:hover {
    background-color: var(--btn-primary-hover-bg);
    border-color: var(--btn-primary-hover-bg);
}

.btn.btn-primary:focus {
    box-shadow: none;
}

.clear-file-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    line-height: 1;
    color: var(--clear-btn-color);
    opacity: 0.7;
    transition: opacity 0.2s ease-in-out;
}

.clear-file-btn:hover {
    opacity: 1;
}

.alert.alert-warning {
    background-color: var(--alert-warning-bg);
    color: var(--alert-warning-color);
    border-color: var(--alert-warning-border);
}

.form-group {
    margin-bottom: 2rem;
}

.form-section-label {
    display: block;
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.form-separator {
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--text-color);
    opacity: 0.6;
    margin: 2rem 1rem;
}

.form-separator::before,
.form-separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--form-control-border);
}

.form-separator:not(:empty)::before { margin-right: 1em; }
.form-separator:not(:empty)::after { margin-left: 1em; }

html[data-theme="dark"] .form-separator {
    color: var(--text-color);
    font-weight: bold;
    opacity: 0.9;
}

html[data-theme="dark"] .form-horizontal label,
html[data-theme="dark"] .form-horizontal .form-check-label,
html[data-theme="dark"] .form-horizontal legend {
    color: var(--text-color);
    opacity: 1;
}

/* === 8. HOMEPAGE SECTIONS === */
.welcome-intro {
    font-size: 1.3rem;
    line-height: 1.6;
    color: var(--link-colour);
    font-weight: 500;
    margin-bottom: 2rem;
}

.section-divider {
    margin: 2rem 0 1.5rem 0;
    border: none;
    height: 2px;
    background: var(--form-control-border);
}

/* How It Works Section */
.how-it-works-section {
    margin: 2.5rem 0;
    padding: 2rem;
    background: var(--form-control-bg);
    border-radius: 1rem;
    border: 1px solid var(--form-control-border);
}

.how-it-works-section h2 {
    color: var(--link-colour);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.75rem;
}

.steps-container {
    display: flex;
    align-items: stretch;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.step-item {
    text-align: center;
    flex: 1;
    min-width: 200px;
    max-width: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-bottom: 2rem;
}

.step-number {
    width: 3.2rem;
    height: 3.2rem;
    background: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 2rem;
    margin: 0 auto 1rem auto;
    box-shadow: 0 2px 8px rgba(25, 118, 210, 0.11);
    flex-shrink: 0;
}

.step-item h3 {
    color: var(--text-colour);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    text-align: center;
    width: 100%;
}

.step-item p {
    font-size: 0.95rem;
    color: var(--muted-text-colour);
    line-height: 1.4;
    text-align: center;
    margin: 0;
}

.step-arrow {
    font-size: 2.2rem;
    color: var(--accent-highlight-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    align-self: center;
}

.processing-time {
    text-align: center;
    font-style: italic;
    color: var(--muted-text-colour);
    font-size: 0.95rem;
}

/* Features Section */
.features-section {
    margin: 2.5rem 0;
    padding: 2rem;
    background-color: var(--form-control-bg);
    border-radius: 1rem;
    border: 1px solid var(--form-control-border);
}

.features-section h2 {
    text-align: center;
    color: var(--link-colour);
    margin-bottom: 2rem;
    font-size: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-item {
    padding: 1.5rem;
    background: var(--background-colour);
    border-radius: 0.75rem;
    border: 1px solid var(--form-control-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.feature-item h3 {
    color: var(--text-colour);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-item p {
    font-size: 1rem;
    color: var(--muted-text-colour);
    line-height: 1.6;
}

/* Example Output Section */
.example-output {
    margin: 2.5rem 0;
}

.example-output h2 {
    color: var(--link-colour);
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

.example-description {
    font-size: 1.1rem;
    color: var(--muted-text-colour);
    margin-bottom: 1.5rem;
}

.example-container {
    border: 2px solid var(--form-control-border);
    border-radius: 0.75rem;
    overflow: hidden;
    background: var(--form-control-bg);
}

.example-content {
    padding: 2rem;
    font-style: italic;
    background: var(--background-colour);
}

.example-audio-note,
.example-audio-note p,
.example-audio-note em,
.example-audio-note strong {
    color: var(--text-color) !important;
    font-style: normal !important;
}

html[data-theme="dark"] .example-audio-note,
html[data-theme="dark"] .example-audio-note p,
html[data-theme="dark"] .example-audio-note em,
html[data-theme="dark"] .example-audio-note strong {
    color: var(--accent-highlight-color) !important;
    font-style: normal !important;
}

/* Upload Section */
.upload-instructions-container {
    text-align: center;
    margin-bottom: 2rem;
}

.upload-instructions {
    font-size: 1.2rem;
    color: var(--text-colour);
    margin-bottom: 1rem;
}

.supported-formats-prominent {
    background: var(--form-control-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--form-control-border);
    display: inline-block;
    font-size: 1rem;
}

.format-badges {
    margin: 0 0.5rem;
}

.format-badge {
    background: #1565c0;
    color: #fff;        
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-family: monospace;
    font-weight: bold;
    margin: 0 0.25rem;
    font-size: 1rem;
    border: none;
    box-shadow: 0 2px 4px rgba(21,101,192,0.10);
}

#drop-zone {
    position: relative;
    padding: 2rem;
    border: 3px dashed transparent;
    border-radius: 0.5rem;
    transition: border-color 0.3s ease-in-out;
}

#drop-zone.drag-over {
    border-color: var(--accent-highlight-bg);
}

.custom-file-upload {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-align: left;
    margin-bottom: 0.5rem;
}

.custom-file-upload input[type="file"] {
    display: none;
}

.custom-file-upload .btn {
    background-color: #6c757d;
    color: white;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}

.custom-file-upload .btn:hover,
.custom-file-upload .btn:focus-visible {
    background-color: var(--accent-highlight-bg);
}

#file-chosen-name {
    font-size: 1rem;
    font-style: normal;
    color: var(--text-colour);
    flex-shrink: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-format-help,
.url-format-help {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--muted-text-colour);
    font-style: italic;
}

.generate-btn {
    font-size: 1.1rem;
    padding: 0.75rem 2rem;
    font-weight: bold;
    transition: all 0.3s ease;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.btn-icon {
    margin-right: 0.5rem;
}

.processing-info {
    margin-top: 1rem;
}

.processing-info small {
    color: var(--muted-text-colour);
    font-style: italic;
}

/* Sample Files Section */
.sample-files-section {
    margin: 2.5rem 0;
    padding: 2rem;
    background: var(--form-control-bg);
    border-radius: 1rem;
    border: 1px solid var(--form-control-border);
    text-align: center;
}

.sample-files-section h2 {
    color: var(--link-colour);
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

.sample-links-list {
    list-style: none;
    padding-left: 0;
    margin: 0 0 1.5rem 0;
}

.sample-links-list li {
    margin-bottom: 1.2rem;
}

.sample-links-list a {
    font-size: 24px;
    color: var(--link-color);
    text-decoration: underline;
    outline-offset: 2px;
}

.sample-links-list a:hover {
    color: var(--btn-primary-bg);
    text-decoration: underline;
}

/* === OPTIONS PAGE STYLES === */
.options-layout {
    display: flex;
    gap: 2rem;
    position: relative;
}

.options-main {
    flex: 1;
    margin-right: 340px;
    min-width: 0;
}

.preview-sidebar {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 320px;
    height: calc(100vh - 100px);
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 1rem;
    padding: 1.5rem;
    overflow-y: auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 1000;
}

.composer-byline {
    font-size: 1.3rem;
    color: var(--text-colour) !important;
    opacity: 0.8;
    margin: 0 0 3rem 0;
}

html[data-theme="dark"] .composer-byline {
    color: var(--text-colour) !important;
    opacity: 0.9;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--form-control-border);
}

.preview-header h3 {
    margin: 0;
    color: var(--link-colour);
    font-size: 1.3rem;
}

.keyboard-shortcuts-toggle {
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.5rem;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-colour);
    transition: all 0.2s ease;
}

.keyboard-shortcuts-toggle:hover {
    background: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
}

.keyboard-shortcuts-toggle[aria-pressed="false"] {
    opacity: 0.6;
}

.preview-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.preview-card {
    background: var(--background-colour);
    border: 1px solid var(--form-control-border);
    border-radius: 0.75rem;
    padding: 1rem;
    transition: all 0.2s ease;
}

.preview-card.current-preview {
    border-color: var(--accent-highlight-bg);
    background: var(--form-control-bg);
}

.preview-card h4 {
    margin: 0 0 0.75rem 0;
    color: var(--text-colour);
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.shortcut-key {
    background: var(--form-control-border);
    color: var(--text-colour);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.7rem;
    font-weight: bold;
}

.preview-content {
    margin-bottom: 0.75rem;
}

.preview-text {
    font-size: 0.9rem;
    color: var(--muted-text-colour);
    line-height: 1.4;
    font-style: italic;
}

.apply-preset-btn {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-colour);
    border: none;
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.apply-preset-btn:hover {
    background: var(--btn-primary-hover-bg);
    transform: translateY(-1px);
}

.preview-match-indicator {
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.5rem;
    padding: 1rem;
    text-align: center;
    color: var(--text-colour);
}

.match-icon {
    font-size: 1.5rem;
    color: #28a745;
    margin-bottom: 0.5rem;
}

.match-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.options-section {
    background: var(--form-control-bg);
    border-radius: 1rem;
    border: 1px solid var(--form-control-border);
    margin-bottom: 2rem;
    overflow: hidden;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: var(--background-colour);
    border-bottom: 1px solid var(--form-control-border);
}

.section-header h2,
.section-title {
    margin: 0;
    color: var(--link-colour);
    font-size: 1.5rem;
}

.section-title {
    font-size: 1.3rem;
}

.section-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.section-collapse-btn {
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.5rem;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-colour);
    transition: all 0.2s ease;
}

.section-collapse-btn:hover {
    background: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
    transform: scale(1.05);
}

.collapse-icon {
    font-size: 1.2rem;
    font-weight: bold;
    line-height: 1;
}

.section-content {
    padding: 2rem;
}

.section-description {
    color: var(--muted-text-colour);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.5;
}

.additional-colour-section {
    background: var(--background-colour);
    border-radius: 0.75rem;
    border: 1px solid var(--form-control-border);
    margin-top: 2rem;
    overflow: hidden;
}

.additional-colour-section .section-header {
    padding: 1rem 1.5rem;
    background: var(--form-control-bg);
}

.additional-colour-section .section-content {
    padding: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-colour);
    margin-bottom: 0.75rem;
}

.form-legend {
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--text-colour);
    margin-bottom: 1rem;
    padding: 0;
    border: none;
}

.form-subheading {
    font-size: 1.3rem;
    color: var(--text-colour);
    margin-bottom: 1rem;
    font-weight: 600;
}

/* Validation */
.validation-message {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 3rem;
    opacity: 1;
    transition: opacity 0.2s ease;
}

.validation-message[style*="display: none"] {
    display: flex !important;
    opacity: 0;
    pointer-events: none;
}

.instruments-selection {
    position: relative;
}

.validation-message.hidden {
    visibility: hidden;
    opacity: 0;
}

html[data-theme="dark"] .validation-message {
    background: #4d3c0c;
    border-color: #856404;
    color: #ffda6a;
}

.validation-icon {
    font-size: 1.1rem;
}

.radio-input {
    transform: scale(1.4);
    margin-right: 0 0.4rem 0 0;
    vertical-align: middle;
}
.radio-group,
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    align-items: flex-start;
    justify-items: start;
    text-align: left;
}
.radio-label {
    font-size: 1rem;
    color: var(--text-color);
    margin-left: 0.5;
    display: inline-block;
    font-weight: normal;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 1.4rem;
    justify-content: flex-start;
    width: fit-content;
}

.checkbox-item input[type="checkbox"] {
    width: 1.4rem;
    height: 1.4rem;
    margin: 0;
    flex-shrink: 0;
}

.checkbox-item label {
    font-size: 1rem;
    color: var(--text-colour) !important;
    margin: 0;
    cursor: pointer;
    line-height: 1.5;
    font-weight: 500;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    text-align: left;
    white-space: nowrap;
}

.checkbox-group {
    display: grid;
    gap: 1rem;
    align-items: start;
    justify-items: start;
}

html[data-theme="dark"] .checkbox-item label,
.checkbox-item input[type="checkbox"]:checked + label,
html[data-theme="dark"] .checkbox-item input[type="checkbox"]:checked + label {
    color: var(--text-colour) !important;
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

.checkbox-item input[type="checkbox"]:checked {
    transform: none;
    position: relative;
    margin: 0;
    margin-top: 0.1rem;
}

.checkbox-item input[type="checkbox"]:checked + label::before,
.checkbox-item input[type="checkbox"]:checked + label::after {
    display: none !important;
}

html[data-theme="dark"] .checkbox-item label,
html[data-theme="dark"] .radio-item .radio-label {
    color: var(--text-colour) !important;
    opacity: 1 !important;
}

.colouring-details {
    background: var(--background-colour);
    border-radius: 0.75rem;
    border: 1px solid var(--form-control-border);
    padding: 2rem;
    margin-top: 1.5rem;
}

.colour-element-section {
    margin-bottom: 2rem;
}

.colour-element-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.colour-element-header input[type="checkbox"] {
    width: 1.4rem;
    height: 1.4rem;
    margin: 0;
}

.colour-element-header .form-label {
    margin: 0;
    flex-grow: 1;
}

.colour-element-desc {
    color: var(--muted-text-colour);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.colour-palette-section {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.palette-radios {
    min-width: 180px;
    margin-right: 1rem;
    flex-shrink: 0;
}

.colour-pickers {
    background: var(--form-control-bg);
    border-radius: 0.75rem;
    padding: 1.5rem;
    border: 1px solid var(--form-control-border);
}

.colour-pickers-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-colour);
    margin-bottom: 1rem;
}

.colour-pickers-desc {
    color: var(--muted-text-colour);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.colour-picker-grid {
    display: grid;
    gap: 1rem;
}

.colour-picker-item {
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.5rem;
    padding: 1rem;
    transition: all 0.2s ease;
}

.colour-picker-item:hover {
    border-color: var(--accent-highlight-bg);
    transform: translateY(-1px);
}

.colour-picker-controls {
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: 0.75rem;
    align-items: center;
}

.colour-picker-label {
    font-weight: 600;
    color: var(--text-colour);
    font-size: 1rem;
    min-width: 60px;
}

.colour-picker-input {
    width: 50px;
    height: 40px;
    border: 2px solid var(--form-control-border);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.colour-picker-input:focus {
    outline: none;
    border-color: var(--accent-highlight-bg);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

.colour-picker-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.hex-input {
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.5rem;
    padding: 0.5rem;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-colour);
    transition: all 0.2s ease;
}

.hex-input:focus {
    outline: none;
    border-color: var(--accent-highlight-bg);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

.hex-input:invalid {
    border-color: var(--clear-btn-colour);
    background-color: rgba(220, 53, 69, 0.1);
}

.hex-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.colour-preview {
    background: var(--form-control-bg);
    border: 2px solid var(--form-control-border);
    border-radius: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-family: monospace;
    font-weight: bold;
    font-size: 1.4rem;
    min-width: 100px;
    text-align: center;
    transition: all 0.2s ease;
    line-height: 1;
}

.help-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 50%;
    border: 1px solid var(--form-control-border);
    background: var(--form-control-bg);
    color: var(--muted-text-colour);
    font-size: 0.9rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 0.5rem;
    flex-shrink: 0;
}

.help-btn:hover,
.help-btn:focus {
    background: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
    border-color: var(--accent-highlight-bg);
    transform: scale(1.1);
}

.help-btn.active {
    background: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
    border-color: var(--accent-highlight-bg);
}

.help-text-panel {
    background: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-top: 1rem;
    line-height: 1.6;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.help-list {
    margin: 0;
    padding-left: 1.5rem;
}

.help-list li {
    margin-bottom: 0.75rem;
    color: var(--text-colour);
}

.help-list strong {
    color: var(--link-colour);
}

.form-actions {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--form-control-border);
}

.generate-btn {
    font-size: 1.3rem;
    padding: 1rem 3rem;
    font-weight: bold;
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.3);
}

.high-contrast .colour-preview {
    border: 3px solid currentColor;
    font-weight: 900;
}

.high-contrast .colour-picker-input {
    border-width: 3px;
}

.high-contrast .help-btn {
    border-width: 2px;
    font-weight: 900;
}

/* Mobile Responsive */
@media (max-width: 1200px) {
    .options-main {
        margin-right: 280px;
    }
    .preview-sidebar {
        width: 260px;
    }
    .colour-palette-section {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .options-layout {
        flex-direction: column;
    }
    .options-main {
        margin-right: 0;
    }
    .preview-sidebar {
        position: relative;
        width: 100%;
        height: auto;
        top: auto;
        right: auto;
        margin-bottom: 2rem;
        order: -1;
    }
    .form-row {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .section-header {
        padding: 1rem 1.5rem;
    }
    .section-content {
        padding: 1.5rem;
    }
    .colour-picker-controls {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        text-align: center;
    }
    .colour-picker-input {
        width: 100%;
        max-width: 100px;
        margin: 0 auto;
    }
    .preview-cards {
        gap: 0.75rem;
    }
    .preview-card {
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    .section-header h2 {
        font-size: 1.3rem;
    }
    .generate-btn {
        width: 100%;
        font-size: 1.1rem;
        padding: 0.9rem 2rem;
    }
    .keyboard-shortcuts-toggle {
        font-size: 0.7rem;
        padding: 0.3rem 0.6rem;
    }
}

@media print {
    .preview-sidebar,
    .section-collapse-btn,
    .apply-preset-btn,
    .keyboard-shortcuts-toggle {
        display: none !important;
    }
    .options-main {
        margin-right: 0;
    }
    .options-section {
        break-inside: avoid;
        margin-bottom: 1rem;
    }
}

/* === SCORE PAGE === */
.meta-info,
.repetition-info {
    padding: 12px 16px;
    margin: 16px 0;
    font-size: 1.1em;
    font-weight: 500;
    border-radius: 4px;
}

.repetition-info {
    background-color: #e7f3fe;
    border-left: 5px solid #2196F3;
    color: #333;
}

.meta-info {
    background-color: #fff8e1;
    border-left: 5px solid #ffc107;
    color: #333;
}

html[data-theme="dark"] .repetition-info {
    background-color: #2a3a4a;
    border-left-color: #64b5f6;
    color: #e0e0e0;
}

html[data-theme="dark"] .meta-info {
    background-color: #3e3828;
    border-left-color: #ffc107;
    color: #e0e0e0;
}

div[id^="segment-"] h2 {
    margin-top: 2.5rem;
}

.beat-group {
    border-top: 1px solid var(--form-control-border);
    padding-top: 0.75rem;
    margin-top: 0.75rem;
}

div[id^="segment-"] h5 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 1.5rem;
    border-bottom: 1px solid var(--form-control-border);
    padding-bottom: 0.5rem;
}

.score-nav-ribbon {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 200px;
    height: calc(100vh - 100px);
    padding: 1rem;
    background-color: var(--form-control-bg);
    border: 1px solid var(--form-control-border);
    border-radius: 0.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 1000;
    overflow-y: auto;
}

.score-nav-ribbon .nav-link-top {
    font-weight: bold;
    display: block;
    text-align: center;
    margin-bottom: 0.5rem;
}

.score-nav-ribbon ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.score-nav-ribbon li a {
    display: block;
    padding: 0.5rem 0.75rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.score-nav-ribbon li a:hover,
.score-nav-ribbon li a:focus-visible {
    background-color: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
    text-decoration: none;
}

.score-nav-ribbon li a.active {
    background-color: var(--accent-highlight-bg);
    color: var(--accent-highlight-colour);
    font-weight: bold;
}

.score-nav-ribbon .nav-link-stop {
    display: block;
    width: 100%;
    padding: 0.5rem;
    margin: 0.5rem 0;
    text-align: center;
    font-weight: bold;
    text-decoration: none;
    border-radius: 4px;
    background-color: var(--clear-btn-colour);
    color: var(--accent-highlight-colour);
    transition: opacity 0.2s ease;
    border: none;
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
}

.score-nav-ribbon .nav-link-stop:hover,
.score-nav-ribbon .nav-link-stop:focus-visible {
    opacity: 0.8;
    color: var(--accent-highlight-colour);
    text-decoration: none;
}

#score-main-content {
    padding-right: 240px; 
    padding-left: 2rem;
    padding-top: 1rem;
    padding-bottom: 2rem;
}

/* === 11. ANIMATIONS === */
.loading {
    -webkit-animation: spin 2s linear infinite;
    -moz-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
}

@-moz-keyframes spin { 100% { -moz-transform: rotate(360deg); } }
@-webkit-keyframes spin { 100% { -webkit-transform: rotate(360deg); } }
@keyframes spin { 100% { -webkit-transform: rotate(360deg); transform: rotate(360deg); } }

html[data-theme="dark"] #key-sig-help-text,
html[data-theme="dark"] #key-sig-help-text p,
html[data-theme="dark"] #key-sig-help-text li {
    color: var(--text-colour) !important;
}

html[data-theme="dark"] #key-sig-help-text {
    border-left-color: #6c757d;
}

html[data-theme="dark"] #key-sig-help-text strong {
    color: var(--text-colour) !important;
}

html[data-theme="dark"] .generate-btn:hover:not(:disabled) {
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
}

html[data-theme="dark"] .feature-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

@media (min-width: 768px) {
    .step-arrow {
        display: block;
    }
}

@media (max-width: 767px) {
    .steps-container {
        flex-direction: column;
    }
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .example-content,
    .example-audio-note {
        padding: 1rem;
    }
    .how-it-works-section,
    .features-section {
        padding: 1.5rem;
    }
}
/* Advanced Color Layout */
.advanced-color-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.advanced-color-layout .palette-radios {
    min-width: 205px;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.vertical-radios .radio-item {
    display: flex;
    align-items: center;
    gap: 0.8em;
}


.big-radio {
    transform: scale(1.4);
    margin-right: 1em;
    vertical-align: middle;
}

.color-pickers-with-preview {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.color-preview {
    margin-bottom: 1.2rem;
    font-size: 1.6em;
    font-weight: bold;
}
.color-palette-section {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    align-items: flex-start;
}
.color-pickers {
    margin-left: auto;
    width: 100%;
    display: flex;
    justify-content: flex-end;


}

@media (max-width: 900px) {
    .advanced-color-layout {
        flex-direction: column;
    }
    .color-pickers-with-preview {
        width: 100%;
    }
}
.color-picker-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 0.7rem;
}
#octave-colour-panel .color-pickers-title,
#rhythm-colour-panel .color-pickers-title {
    margin-top: 1.2em;
    margin-bottom: 1em;
    display: block;
}
#octave-color-section .form-control,
#rhythm-color-section .form-control {
    margin-bottom: 1.1em;
}
.color-picker-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 0.5rem;
}

.color-picker-item {
    display: flex;
    align-items: center;
    gap: 1.2em;
    padding: 0.4em 0;
    background: none;
    border: none;
}
.color-picker-label {
    min-width: 60px;
    text-align: left;
}
.color-picker-input, .hex-input {
    margin-right: 0.5em;
}
.color-picker-controls {
    display: flex;
    align-items: center;
    gap: 1em;
}
#preview-octave, #preview-rhythm {
    display: block;
    margin: 1.2em 0 1em 0;
    font-size: 1.4em;
    font-weight: bold;
    text-align: left;
}
.color-element-header input[type="checkbox"] {
    transform: scale(1.35);
    margin-right: 0.7em;
}

.color-element-header .form-label {
    margin-right: 0.7em;
}

#preview-pitch, #preview-octave, #preview-rhythm {
    display: block;
    margin-bottom: 1.2rem;
    margin-top: 0;
    font-size: 1.6em;
    font-weight: bold;
    text-align: right;
    border: none;
}

.color-palette-section {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 900px) {
    .color-palette-section,
    .colour-palette-section {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
}

/* Make sure only one #preview-pitch is present and styled */
.color-element-header #preview-pitch {
    margin-left: 1.2em;
    margin-bottom: 0;
}