:root {
    --primary-color: #1a73e8;
    --primary-color-dark: #1867cf;
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-primary-color: #202124;
    --text-secondary-color: #5f6368;
    --border-color: #dadce0;
    --light-bg: #f1f3f4;
}

html.dark {
    --bg-color: #2d2e30;
    --surface-color: #3c4043;
    --text-primary-color: #e8eaed;
    --text-secondary-color: #9aa0a6;
    --border-color: #5f6368;
    --light-bg: #202124;
}


html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-primary-color);
    background-color: var(--bg-color);
    margin: 0;
    padding-top: 70px; /* Space for the fixed header */
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Full Page Loader --- */
.full-page-loader {
    position: fixed;
    inset: 0;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1001; /* Higher than header */
    transition: opacity 0.3s ease-out;
    text-align: center;
    color: var(--text-secondary-color);
}

/* --- Login Overlay --- */
.login-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
.login-overlay.visible {
    display: flex;
}
.login-form-container {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    text-align: center;
}
.login-logo-container {
    margin-bottom: 1.5rem;
}
.login-logo-container img {
    height: 40px;
    max-width: 150px;
    object-fit: contain;
}
html.dark .login-logo-container img {
    filter: brightness(0) invert(1);
}
.login-form-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary-color);
    margin-bottom: 1.5rem;
}
.login-form-container .form-group {
    text-align: left;
    margin-bottom: 1rem;
}
.login-form-container label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary-color);
    margin-bottom: 0.5rem;
}
.login-form-container input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--light-bg);
    color: var(--text-primary-color);
    font-size: 1rem;
    box-sizing: border-box;
}
.login-form-container input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}
.login-form-container button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background-color: var(--primary-color);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 1rem;
}
.login-form-container button:hover {
    background-color: var(--primary-color-dark);
}
.login-error {
    color: #DC2626;
    background-color: #FEF2F2;
    border: 1px solid #FCA5A5;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-top: 1rem;
    min-height: 1.5rem;
    transition: all 0.2s ease-in-out;
}
.login-error:empty {
    margin-top: 0;
    padding: 0;
    border-width: 0;
    min-height: 0;
    opacity: 0;
}
html.dark .login-error {
    color: #F87171;
    background-color: rgba(153, 27, 27, 0.2);
    border-color: rgba(220, 38, 38, 0.5);
}


/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    width: 100%;
    padding: 0 24px;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary-color);
    text-decoration: none;
}
.logo img {
    height: 32px;
    transition: filter 0.3s ease-in-out;
}
html.dark .logo img {
    filter: brightness(0) invert(1);
}
.back-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-secondary-color);
    font-weight: 500;
    transition: color 0.2s;
}
.back-link:hover {
    color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.header-title-text {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}




/* --- Main Content --- */
main {
    padding-top: 40px;
    padding-bottom: 40px;
}

/* --- Search Section --- */
.search-section {
    background-color: var(--primary-color);
    padding: 48px 0;
    margin-top: 0;
}

.search-section .search-container {
    position: relative;
}

#search-input {
    width: 100%;
    padding: 16px 20px 16px 50px;
    font-size: 1.1rem;
    border: 1px solid var(--border-color);
    border-radius: 99px;
    background-color: var(--surface-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.2s;
}
html.dark #search-input {
    background-color: var(--light-bg);
    color: var(--text-primary-color);
    border-color: var(--border-color);
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.4);
}
html.dark #search-input:focus {
    box-shadow: 0 0 0 4px rgba(26, 115, 232, 0.3);
}


.search-section .search-container .material-icons-outlined {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary-color);
}

.ai-prompt-container {
    text-align: center;
    margin-top: 16px;
}
.ask-ai-prompt-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: white;
    font-weight: 500;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.2s;
    font-size: 1.05rem; /* Bigger text */
    text-decoration: none; /* No underline */
}
.ask-ai-prompt-btn:hover {
    opacity: 1;
}


/* --- Categories --- */
.categories-container {
    margin-top: 40px;
    margin-bottom: 32px;
    display: flex;
    justify-content: center;
}

.categories-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.category-box {
    padding: 10px 24px; /* Bigger */
    border: 2px solid var(--border-color);
    color: var(--text-secondary-color);
    background-color: var(--surface-color);
    border-radius: 99px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1rem; /* Bigger */
    display: inline-flex;
    align-items: center;
}

.category-box:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.category-box.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

html.dark .category-box {
    background-color: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-secondary-color);
}
html.dark .category-box:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}
html.dark .category-box.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.section-divider {
    border: 0;
    height: 2px;
    background-color: var(--primary-color);
    opacity: 0.3;
    margin: 40px auto;
    width: 100%;
}


/* --- View Controls --- */
.view-controls-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.view-mode-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    background-color: var(--light-bg);
    padding: 4px;
    border-radius: 8px;
}
html.dark .view-mode-toggle {
    background-color: #2a2a2a;
}


.view-mode-toggle button {
    background-color: transparent;
    border: none;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-mode-toggle button.active {
    background-color: var(--surface-color);
    color: var(--primary-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
html.dark .view-mode-toggle button.active {
    background-color: #3c4043;
}


.sort-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sort-controls select {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary-color);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
}
html.dark .sort-controls select {
    background-color: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-primary-color);
}

.sort-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.1);
}

.sort-controls button {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 6px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}
html.dark .sort-controls button {
    background-color: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-secondary-color);
}


.sort-controls button:hover {
    background-color: var(--light-bg);
}
html.dark .sort-controls button:hover {
    background-color: #2a2a2a;
}

/* --- Content Grid & List --- */
.category-section {
    margin-bottom: 40px;
}
.category-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary-color);
    margin-bottom: 24px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}
.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}
.guides-grid .guide-card h3 {
    color: var(--primary-color);
}
.guides-grid .card-meta {
    justify-content: flex-start;
}


.guides-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.guides-list .guide-card {
    padding: 16px 24px;
    align-items: flex-start;
}

.guide-card {
    position: relative;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    cursor: pointer;
}
.guide-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    border-color: var(--primary-color);
}
.guide-card h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0 0 8px 0;
}
.guide-card .guide-title-link {
    text-decoration: none;
    color: var(--primary-color);
}
.guide-card:hover .guide-title-link {
    text-decoration: none;
}

.guide-card p {
    font-size: 0.95rem;
    color: var(--text-secondary-color);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.guides-list .guide-card p {
    -webkit-line-clamp: 2;
}

.guides-grid .guide-card {
    display: flex;
    flex-direction: column;
}

.card-main-content {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.guides-list .card-main-content {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-width: 0;
}

.card-meta {
    margin-top: auto;
    padding-top: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    font-size: 0.8rem;
    color: var(--text-secondary-color);
    gap: 1rem;
}

.guides-list .card-meta {
    padding-top: 8px;
    margin-top: 8px;
    align-self: flex-end;
}

/* Card Buttons (Favorite, Copy) */
.card-buttons-container {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 10;
}
.guide-card:hover .card-buttons-container {
    opacity: 1;
}

.favorite-btn, .copy-link-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    color: var(--text-secondary-color);
    transition: background-color 0.2s, color 0.2s;
}
.favorite-btn:hover, .copy-link-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--primary-color);
}
html.dark .favorite-btn:hover, html.dark .copy-link-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.favorite-btn .material-icons-outlined,
.copy-link-btn .material-icons-outlined {
    font-size: 20px;
}
.favorite-btn.is-favorite .material-icons-outlined {
    color: #f59e0b; /* yellow-500 */
}
.copy-link-btn.copied .material-icons-outlined {
    color: #16a34a; /* green-600 */
}

/* --- Pagination --- */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}
.pagination-container button {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}
.pagination-container button:hover:not(:disabled) {
    background-color: var(--light-bg);
}
.pagination-container button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}
.pagination-container button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}


/* --- Loading & Error States --- */
.loading-state, .error-state {
    text-align: center;
    padding: 80px 0;
    color: var(--text-secondary-color);
}
.spinner {
    width: 48px;
    height: 48px;
    border: 5px solid var(--light-bg);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}
html.dark .spinner {
    border: 5px solid var(--light-bg);
    border-top-color: var(--primary-color);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}
.error-state .material-icons-outlined {
    font-size: 64px;
    color: var(--primary-color);
}
.error-state h2 {
    font-size: 1.5rem;
    color: var(--text-primary-color);
}

.no-results {
    text-align: center;
    padding: 40px;
    font-size: 1.1rem;
    color: var(--text-secondary-color);
}

/* --- Guide View --- */
.guide-container {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.07);
    margin-top: 40px;
    max-width: 800px;
}
.guide-main-header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}
.guide-main-header h1 {
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 0 24px 0;
    padding: 0 40px; /* Space for copy button */
}
.copy-link-btn-header {
    position: absolute;
    top: 0;
    right: 0;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--text-secondary-color);
    transition: background-color 0.2s, color 0.2s;
}
.copy-link-btn-header:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}
.copy-link-btn-header .material-icons-outlined { font-size: 28px; }
.copy-link-btn-header.copied .material-icons-outlined { color: #16a34a; }


.play-guide-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: var(--light-bg);
    color: var(--text-primary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s;
}
.play-guide-button:hover { background-color: var(--border-color); }
html.dark .play-guide-button {
    background-color: var(--surface-color);
    color: var(--text-primary-color);
    border-color: var(--border-color);
}
html.dark .play-guide-button:hover {
     background-color: var(--light-bg);
}


#guide-article .description {
    text-align: center;
    font-size: 1.1em;
    color: var(--text-secondary-color);
    margin-top: 0;
    padding-bottom: 30px;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}
html.dark #guide-article .description {
    color: var(--text-secondary-color);
}


/* -- Guide Content Generated by htmlService -- */
.index-container { background-color: var(--light-bg); border: 1px solid var(--border-color); border-radius: 12px; padding: 25px; margin-bottom: 40px; page-break-after: always; }
html.dark .index-container {
    background-color: var(--light-bg);
}
.index-container h2 { font-size: 1.5em; color: var(--primary-color); margin-top: 0; margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.index-container ol { padding-left: 0; margin: 0; list-style-type: none; }
.index-container ol li { margin-bottom: 10px; }
.index-container a { text-decoration: none; color: var(--text-primary-color); font-size: 1.1em; transition: color 0.2s; display: flex; gap: 8px; }
.index-container a:hover { color: var(--primary-color); }
.index-container ol ol { padding-left: 20px; margin-top: 10px; }
.index-container ol ol a { font-size: 1em; color: var(--text-secondary-color); }

.step-container {
    display: flex;
    gap: 20px;
    padding: 25px;
    margin-bottom: 25px;
    border-radius: 12px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    align-items: flex-start;
    position: relative;
    scroll-margin-top: 100px;
}
.step-container.warning { background-color: #fefce8; border-color: #fde047; }
html.dark .step-container.warning { background-color: #423c1d; border-color: #725a03; }
.step-container.info { background-color: #eff6ff; border-color: #93c5fd; }
html.dark .step-container.info { background-color: #1c2b4d; border-color: #1e40af; }
.step-container.success { background-color: #f0fdf4; border-color: #86efac; }
html.dark .step-container.success { background-color: #1a3b2b; border-color: #166534; }
.step-container.danger { background-color: #fef2f2; border-color: #fca5a5; }
html.dark .step-container.danger { background-color: #451a1a; border-color: #991b1b; }
.step-container.embedded_guide { background-color: #f8fafc; border-color: #e2e8f0; }
html.dark .step-container.embedded_guide { background-color: var(--light-bg); border-color: var(--border-color); }

html.dark .step-container {
    background-color: var(--surface-color);
}


.step-number-wrapper { flex-shrink: 0; margin-top: 4px; }
.step-number-circle { width: 32px; height: 32px; border-radius: 50%; background-color: var(--primary-color); color: white; display: flex; align-items: center; justify-content: center; font-size: 1em; font-weight: bold; }
.step-content { flex-grow: 1; min-w: 0; }
.step-content h2 {
    font-size: 1.5em; /* Adjusted title size */
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    line-height: 1.3;
    position: relative;
    padding-right: 30px; /* Space for the icon */
}
.step-container.warning .step-content h2 { color: #a16207; }
html.dark .step-container.warning .step-content h2 { color: #facc15; }
.step-container.info .step-content h2 { color: #1d4ed8; }
html.dark .step-container.info .step-content h2 { color: #60a5fa; }
.step-container.success .step-content h2 { color: #15803d; }
html.dark .step-container.success .step-content h2 { color: #4ade80; }
.step-container.danger .step-content h2 { color: #b91c1c; }
html.dark .step-container.danger .step-content h2 { color: #f87171; }
.image-wrapper-for-centering { text-align: center; margin-top: 15px; }
.image-container { position: relative; display: inline-block; line-height: 0; }
#guide-content img { max-width: 100%; height: auto; border: 1px solid var(--border-color); border-radius: 8px; display: block; margin-left: auto; margin-right: auto; cursor: zoom-in; }
.image-container img { margin-top: 0; }

.rte-content p, .rte-content ol, .rte-content ul { margin: 0 0 0.5rem 0; }
.rte-content ol, .rte-content ul { padding-left: 1.5rem; }
.rte-content a { color: var(--primary-color); text-decoration: underline; }
.rte-content blockquote { border-left: 4px solid var(--border-color); padding-left: 1rem; color: #5f6368; font-style: italic; }

.rte-content pre {
    overflow-x: auto;
    white-space: pre-wrap; /* Wrap long lines */
    word-break: break-word; /* Break long words if necessary */
    background-color: #f1f3f4;
    padding: 0.8rem;
    border-radius: 4px;
    font-family: monospace;
    max-width: 100%;
    display: block;
}
html.dark .rte-content pre {
    background-color: var(--light-bg);
}


.click-ripple { position: absolute; pointer-events: none; z-index: 5; width: 40px; height: 40px; transform: translate(-50%, -50%); }
.click-ripple::after { content: ''; display: block; width: 100%; height: 100%; border-radius: 50%; border: 3px solid #4ade80; background-color: rgba(74, 222, 128, 0.2); animation: ripple-effect 1.5s ease-out infinite; animation-delay: 0.5s; }
@keyframes ripple-effect { 0% { transform: scale(0); opacity: 1; } 50% { opacity: 0.8; } 100% { transform: scale(2.5); opacity: 0; } }

/* Copy Link Icon */
.copy-step-link {
    position: absolute;
    top: 28px;
    right: 15px;
    font-size: 20px;
    color: var(--text-secondary-color);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
    padding: 4px;
    border-radius: 50%;
    z-index: 10;
}
.step-container:hover .copy-step-link {
    opacity: 1;
}
.copy-step-link:hover {
    color: var(--primary-color);
    background-color: rgba(0, 0, 0, 0.05);
}
html.dark .copy-step-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
.copy-step-link.copied {
    color: #16a34a;
}


/* Image Zoom Overlay */
.image-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.85); display: none; align-items: center; justify-content: center; z-index: 1001; cursor: zoom-out; transition: opacity 0.3s ease; opacity: 0; }
.image-overlay img { max-width: 95vw; max-height: 95vh; object-fit: contain; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); }

/* TTS Controls */
.tts-controls { position: fixed; bottom: -100px; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 8px; padding: 12px; background-color: rgba(32, 33, 36, 0.9); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.4); transition: bottom 0.3s ease-in-out; z-index: 1001; }
.tts-controls.active { bottom: 20px; }
.tts-controls button { background-color: transparent; border: none; color: white; padding: 8px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background-color 0.2s; }
.tts-controls button:hover:not(:disabled) { background-color: rgba(255,255,255,0.2); }
.tts-controls button:disabled { opacity: 0.5; cursor: not-allowed; }
.tts-controls .material-icons-outlined { font-size: 28px; }
.tts-controls #tts-play-pause-btn .material-icons-outlined { font-size: 32px; }

.step-container.playing { border-color: var(--primary-color); box-shadow: 0 0 15px rgba(26, 115, 232, 0.5); transform: scale(1.01); }

.guide-metadata {
    margin-top: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
/* --- Feedback Section --- */
#feedback-section {
    text-align: center;
    margin-top: 40px;
    padding: 30px 20px;
}
.feedback-question {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary-color);
    margin: 0 0 20px 0;
}
.feedback-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}
.feedback-buttons button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 24px;
    font-size: 1rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    border-radius: 99px; /* Pill shape */
    background-color: var(--surface-color);
    color: var(--text-primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}
html.dark .feedback-buttons button {
    background-color: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-primary-color);
}
.feedback-buttons button .material-icons-outlined {
    font-size: 20px;
}
.feedback-buttons button:hover:not(:disabled) {
    background-color: var(--light-bg);
    border-color: var(--text-secondary-color);
}
.feedback-buttons button:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}
.feedback-buttons button.voted,
.feedback-buttons button:disabled:not(.voted) {
    background-color: var(--light-bg);
    color: var(--text-secondary-color);
    border-color: transparent;
}
.feedback-buttons button.voted {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: rgba(26, 115, 232, 0.1);
}
html.dark .feedback-buttons button.voted {
    background-color: rgba(26, 115, 232, 0.2);
}

.feedback-thanks {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
}
.feedback-stats-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    margin-top: 16px;
}
.feedback-count, .view-count {
    display: flex;
    align-items: center;
    gap: 6px;
}
.view-count .material-icons-outlined {
    font-size: 18px;
}


/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 999;
}
.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.scroll-to-top:hover {
    background-color: var(--primary-color-dark);
    transform: scale(1.05);
}

/* --- Footer --- */
.footer {
    max-width: 960px;
    margin: 40px auto 0;
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer p {
    margin: 0;
}
.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}
.footer a:hover {
    text-decoration: underline;
}

.footer-theme-selector {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.9rem;
    font-weight: 500;
}
.footer-theme-selector button {
    background: none; border: none; cursor: pointer; padding: 8px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary-color);
    transition: background-color 0.2s, color 0.2s;
}
.footer-theme-selector button:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}
html.dark .footer-theme-selector button:hover {
    background-color: var(--light-bg);
}


/* --- Recently Viewed --- */
.recently-viewed-container {
    margin-top: 40px;
    padding: 30px;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-bg);
    border-radius: 12px;
}
.recently-viewed-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary-color);
    margin-top: 0;
    margin-bottom: 20px;
}
.recently-viewed-container ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.recently-viewed-container a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
}
.recently-viewed-container a:hover {
    text-decoration: underline;
}


/* --- AI Assistant --- */
#xdoku-ai-assistant-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: transform 0.2s ease-in-out;
    z-index: 1002;
    visibility: hidden; /* Hide by default */
}
#xdoku-ai-assistant-button.visible {
    visibility: visible;
}
.xdoku-ai-assistant-button:hover {
    transform: scale(1.1);
}
.xdoku-ai-assistant-button .material-icons-outlined {
    font-size: 28px;
}
.xdoku-ai-assistant-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.4);
    z-index: 1003;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}
.xdoku-ai-assistant-overlay.open {
    opacity: 1;
    visibility: visible;
}
.xdoku-ai-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: min(420px, 90vw);
    height: 100%;
    font-family: 'Roboto', sans-serif;
    background-color: var(--surface-color);
    box-shadow: -5px 0 25px rgba(0,0,0,0.1);
    z-index: 1004;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
}
.xdoku-ai-panel.open {
    transform: translateX(0);
}
.xdoku-ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.xdoku-ai-header-content {
    display: flex;
    align-items: center;
    gap: 12px;
}
.xdoku-ai-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}
.xdoku-ai-header .material-icons-outlined {
    font-size: 24px;
    color: var(--primary-color);
}
.xdoku-ai-close-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.xdoku-ai-close-button:hover { background-color: var(--light-bg); }
.xdoku-ai-chat-log {
    flex-grow: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.xdoku-user-bubble, .xdoku-ai-bubble {
    padding: 10px 16px;
    border-radius: 20px;
    max-width: 80%;
    font-size: 0.95rem;
    line-height: 1.5;
    word-wrap: break-word;
}
.xdoku-user-bubble {
    background-color: var(--primary-color);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}
.xdoku-ai-bubble {
    background-color: #e8eaed;
    color: var(--text-primary-color);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}
html.dark .xdoku-ai-bubble {
    background-color: var(--light-bg);
    color: var(--text-primary-color);
}

.xdoku-ai-bubble ul { padding-left: 20px; margin: 8px 0; }
.xdoku-ai-bubble p { margin: 8px 0; }
.xdoku-ai-bubble strong { font-weight: 700; }
.xdoku-guide-link-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding: 8px 12px;
    background-color: var(--surface-color);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 500;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.2s;
    font-size: 1em;
}
.xdoku-guide-link-button:hover { background-color: #e8f0fe; }
html.dark .xdoku-guide-link-button:hover { background-color: var(--light-bg); }


.xdoku-loading-dots span {
    display: inline-block; width: 8px; height: 8px; background-color: currentColor;
    border-radius: 50%; animation: xdoku-ai-bounce 1.4s infinite ease-in-out both;
}
.xdoku-loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.xdoku-loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes xdoku-ai-bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1.0); }
}

.xdoku-ai-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-bg);
}
.xdoku-ai-input-form {
    display: flex;
    gap: 8px;
}
#xdoku-ai-query-input {
    flex-grow: 1;
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: 99px;
    background-color: var(--surface-color);
}
#xdoku-ai-query-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.1);
}
#xdoku-ai-submit-button {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}
#xdoku-ai-submit-button:hover:not(:disabled) {
    background-color: var(--primary-color-dark);
}
#xdoku-ai-submit-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- Embed View Styles --- */
body.embed-view {
    padding-top: 0;
    background-color: var(--surface-color);
}

.embed-view .header,
.embed-view .footer,
.embed-view .scroll-to-top,
.embed-view #recently-viewed-section {
    display: none !important;
}

.embed-view .guide-container {
    margin-top: 0;
    padding: 20px;
    border: none;
    box-shadow: none;
    max-width: 100%;
}

.embed-footer {
    margin-top: 40px;
    text-align: center;
}
.embed-footer hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 20px auto;
    width: 80%;
}
.embed-footer p {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
}
.embed-footer a {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
}
.embed-footer a:hover {
    text-decoration: underline;
}