*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    margin: 0;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: auto;
    padding: 30px;
    border-radius: 18px;
    background-color: var(--bg-mantle);
    box-shadow: 0 8px 25px var(--shadow-color);
    display: flex;
    flex-direction: column;
}

.menu {
    margin-bottom: 25px;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 8px;
    background-color: var(--bg-surface);
    display: inline-block;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.menu a:hover,
.menu a:focus {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
    outline: none;
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent-primary) 30%, transparent);
}

.menu a.active {
    color: var(--button-text-color);
    background-color: var(--accent-primary);
}

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    text-align: center;
}

.header-icon {
    width: 45px;
    height: 45px;
    margin-right: 15px;
    border-radius: 8px;
}

h1 {
    color: var(--accent-primary);
    font-size: clamp(1.8rem, 5vw, 2.2rem);
    font-weight: 700;
    margin: 0;
}

.input-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.input-row {
    display: flex;
    gap: 10px;
}

.input-group {
    flex-grow: 1;
    display: flex;
    align-items: center;
    position: relative;
    background-color: var(--bg-surface);
    border-radius: 12px;
    border: 1.5px solid var(--border-color);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-group:focus-within {
    border-color: var(--input-focus-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--input-focus-color) 30%, transparent);
}

.input-group .icon-prefix {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

.input-group input[type="text"] {
    flex-grow: 1;
    padding: 14px 15px 14px 45px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
}

.input-group input[type="text"]::placeholder {
    color: var(--text-placeholder);
    opacity: 1;
}

.action-button {
    background-color: var(--accent-primary);
    color: var(--button-text-color);
    border: none;
    padding: 14px 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 12px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.action-button:hover,
.action-button:focus {
    background-color: var(--accent-primary-hover);
    transform: translateY(-1px);
    outline: none;
    box-shadow: 0 4px 8px var(--shadow-color-light);
}

.action-button:disabled {
    background-color: var(--ctp-overlay0);
    color: var(--text-tertiary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.message-area {
    text-align: center;
    padding: 20px 0;
    min-height: 60px;
}

.message-area .error {
    color: var(--error-color);
    font-weight: 500;
}

#resultsDisplay {
    display: none;
    animation: fadeIn 0.5s ease-out;
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 1024px) {
    #resultsDisplay {
        grid-template-columns: 1fr 1fr;
    }

    #overviewCard,
    #topVideosCard,
    #audienceCard {
        grid-column: 1 / -1;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0px);
    }
}

.result-card {
    background-color: var(--bg-crust);
    padding: 25px;
    border-radius: 15px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.card-header .icon {
    font-size: 1.5rem;
    color: var(--accent-secondary);
    width: 30px;
    text-align: center;
}

.card-header h2 {
    margin: 0;
    font-size: 1.4rem;
    color: var(--text-primary);
    font-weight: 700;
}

.card-body {
    display: grid;
    gap: 20px;
}

.card-body h4 {
    color: var(--text-secondary);
    margin: 15px 0 10px 0;
    font-size: 1.1rem;
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--border-color);
}

.card-body h4:first-child {
    margin-top: 0;
}

.card-body h4 .fa-xs {
    opacity: 0.7;
}

.top-videos-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 600px) {
    .top-videos-container {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

.video-list {
    min-width: 0;
}

.video-list h4 {
    margin: 0 0 10px 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.video-item {
    display: block;
    text-decoration: none;
    padding: 12px 15px;
    background-color: var(--bg-mantle);
    border-radius: 10px;
    transition: background-color 0.2s ease;
    margin-bottom: 8px;
}

.video-item:hover {
    background-color: var(--bg-surface);
}

.video-item .value {
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent-tertiary);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.video-item .desc {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-item.hidden-video {
    display: none;
}

.show-more-btn {
    background-color: var(--accent-secondary);
    color: var(--button-text-color);
    border: none;
    padding: 8px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background-color 0.2s ease;
    margin-top: 10px;
    width: 100%;
}

.show-more-btn:hover {
    background-color: var(--accent-secondary-hover);
}

.profile-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 20px;
    align-items: start;
}

#profileAvatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
    object-fit: cover;
}

.profile-details h3 {
    margin: 0 0 5px 0;
    font-size: 1.5rem;
    color: var(--text-highlight);
    word-break: break-word;
}

.profile-details p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1rem;
}

.profile-bio {
    grid-column: 1 / -1;
    margin-top: 15px;
    padding: 15px;
    background-color: var(--bg-surface);
    border-radius: 8px;
    color: var(--text-secondary);
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}

.profile-bio a {
    color: var(--accent-tertiary);
    text-decoration: none;
}

.profile-bio a:hover {
    text-decoration: underline;
}

.account-details-list {
    grid-column: 1 / -1;
    list-style: none;
    padding: 0;
    margin: 10px 0 0 0;
    font-size: 0.9rem;
}

.account-details-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    padding: 5px 0;
}

.account-details-list li i {
    color: var(--text-tertiary);
    width: 16px;
    text-align: center;
}

.account-details-list li strong {
    color: var(--text-primary);
    font-weight: 500;
}

.stats-grid {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.stat-item {
    background-color: var(--bg-surface);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: block;
    margin-bottom: 5px;
    word-break: break-all;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

.metrics-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 600px) {
    .metrics-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

.metric-group {
    background-color: var(--bg-surface);
    padding: 15px;
    border-radius: 10px;
}

.metric-group h4,
.metric-group h5 {
    margin: 0 0 10px 0;
    font-size: 1rem;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.metric-group h5 {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.metric-item,
.ratio-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 0.95rem;
}

.metric-item span:first-child,
.ratio-item .ratio-label {
    color: var(--text-secondary);
    text-transform: capitalize;
}

.metric-item span:last-child,
.ratio-item .ratio-value {
    color: var(--text-primary);
    font-weight: 500;
    text-align: right;
}

.ratio-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
    margin-top: 10px;
}

.ratio-item:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.ratio-item .ratio-header {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.ratio-item .ratio-explanation {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-style: italic;
}

.assessment-box {
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}

.assessment-box.very-low,
.assessment-box.low,
.assessment-box.insufficient-data {
    background-color: color-mix(in srgb, var(--success-color) 20%, transparent);
    border: 1px solid var(--success-color);
}

.assessment-box.medium {
    background-color: color-mix(in srgb, var(--warning-color) 20%, transparent);
    border: 1px solid var(--warning-color);
}

.assessment-box.high,
.assessment-box.very-high {
    background-color: color-mix(in srgb, var(--error-color) 20%, transparent);
    border: 1px solid var(--error-color);
}

.assessment-box .probability {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
}

.assessment-box .result {
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 5px 0 10px 0;
}

.assessment-box .reasoning {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.assessment-box .confidence {
    font-size: 0.8rem;
    opacity: 0.8;
}

.tag-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-list li {
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
}

.tag-list .placeholder {
    font-style: italic;
    background: transparent;
    padding: 0;
}

.tag-list.trending li {
    display: flex;
    align-items: center;
    gap: 6px;
}

.tag-list .trend-score {
    background-color: color-mix(in srgb, var(--success-color) 40%, transparent);
    color: var(--ctp-green);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: 5px;
}

.three-column-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 600px) {
    .two-column-grid {
        grid-template-columns: 1fr 1fr;
    }

    .three-column-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

.stat-list .metric-item {
    padding: 10px 5px;
}

.heatmap-container {
    overflow-x: auto;
    padding: 5px;
    background-color: var(--bg-surface);
    border-radius: 10px;
}

.heatmap-table {
    border-collapse: collapse;
    width: 100%;
    font-size: 0.75rem;
    min-width: 540px;
}

.heatmap-table th,
.heatmap-table td {
    border: 2px solid var(--bg-crust);
    text-align: center;
    padding: 5px;
}

.heatmap-table th {
    color: var(--text-tertiary);
    font-weight: 500;
}

.heatmap-table td.day-label {
    font-weight: 700;
    color: var(--text-secondary);
    padding: 5px 8px;
}

.heatmap-table td.data-cell {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    transition: transform 0.2s ease;
    cursor: default;
}

.heatmap-table td.data-cell:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
    z-index: 10;
    position: relative;
}

.credits {
    margin-top: 40px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    text-align: center;
    line-height: 1.6;
}

.credits a {
    color: var(--accent-tertiary);
    text-decoration: none;
}

.credits a:hover,
.credits a:focus {
    text-decoration: underline;
    outline: none;
    color: var(--accent-tertiary-hover);
}

.credits span.heart {
    color: var(--error-color);
}

#themeToggle {
    position: fixed;
    top: 15px;
    right: 15px;
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2rem;
    z-index: 1000;
    transition: all 0.2s ease;
}

#themeToggle:hover,
#themeToggle:focus {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
        max-width: 100%;
    }

    .input-row {
        flex-direction: column;
    }

    .profile-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    #profileAvatar {
        margin: 0 auto;
    }

    .account-details-list li {
        justify-content: center;
    }

    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    }

    .stat-value {
        font-size: 1.2rem;
    }

    .metrics-grid,
    .three-column-grid,
    .two-column-grid {
        grid-template-columns: 1fr;
    }

    #resultsDisplay {
        grid-template-columns: 1fr;
    }
}

#keyVerificationArea {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
    min-height: 300px;
}

.api-purchase-info {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-top: -5px;
    margin-bottom: 20px;
}

.api-purchase-info a {
    color: var(--accent-tertiary);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease;
}

.api-purchase-info a:hover {
    text-decoration: underline;
    color: var(--accent-tertiary-hover);
}

#keyVerificationArea .input-group {
    max-width: 400px;
    width: 100%;
    margin-bottom: 20px;
}

#keyVerificationArea .action-button {
    max-width: 400px;
    width: 100%;
}

#keyVerificationMessage {
    margin-top: 15px;
    min-height: 24px;
}

#mainContentArea {
    display: none;
}

#initialLoadingSpinner {
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 50px 20px;
    gap: 15px;
}

#initialLoadingSpinner .loader {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

#keyVerificationArea.fade-out {
    animation: fadeOut 0.5s ease-out forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

.skeleton-loader {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-surface);
    border-radius: 10px;
}

.skeleton-loader::after {
    content: '';
    position: absolute;
    top: 0;
    left: -150%;
    height: 100%;
    width: 150%;
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--bg-surface-hover) 50%, transparent), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    100% {
        left: 150%;
    }
}

.skeleton-header {
    width: 40%;
    height: 24px;
    margin-bottom: 20px;
}

.skeleton-line {
    width: 100%;
    height: 16px;
    margin-bottom: 10px;
}

.skeleton-line-short {
    width: 60%;
}