/* ═══════════════════════════════════════════════════════════
   A/B Title Tester — Page-Specific Styles
   Layout and positioning only; shared components used for
   buttons, forms, cards, badges, tabs, empty states, banners.
   ═══════════════════════════════════════════════════════════ */

/* ── Social Proof ── */
.abt-social-proof {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-top: var(--space-3);
}
.abt-social-proof i {
    color: var(--color-primary, #4F46E5);
    margin-right: var(--space-1);
}

/* ── Tabs ── */
.abt-tabs {
    margin-bottom: var(--space-6);
}

/* ── Tab Content ── */
.abt-tab-content {
    animation: abtFadeIn 200ms ease;
}
@keyframes abtFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Inputs ── */
.abt-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.abt-input-group {
    position: relative;
}

.abt-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.abt-label-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-white, #fff);
    flex-shrink: 0;
}
.abt-label-badge--a {
    background: var(--color-primary, #4F46E5);
}
.abt-label-badge--b {
    background: var(--color-success, #10b981);
}

.abt-char-count {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    text-align: right;
    margin-top: var(--space-1);
    transition: color 150ms ease;
}
.abt-char-count--optimal {
    color: var(--color-success, #10b981);
}
.abt-char-count--warning {
    color: var(--color-danger, #ef4444);
}

.abt-optional {
    font-weight: 400;
    color: var(--color-gray-400);
    font-size: var(--font-size-xs);
}

.abt-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    margin-top: var(--space-1);
}

/* ── Empty State ── */
.abt-empty-state {
    padding: var(--space-10) var(--space-4);
}

/* ── Winner Banner ── */
.abt-winner-banner {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: 12px;
    margin-bottom: var(--space-6);
    background: var(--color-gray-50, #f8fafc);
    border: 2px solid var(--color-gray-200, #e2e8f0);
    transition: all 300ms ease;
}
.abt-winner-banner--a {
    background: rgba(79, 70, 229, 0.06);
    border-color: var(--color-primary, #4F46E5);
}
.abt-winner-banner--b {
    background: rgba(16, 185, 129, 0.06);
    border-color: var(--color-success, #10b981);
}
.abt-winner-banner--tie {
    background: rgba(245, 158, 11, 0.06);
    border-color: var(--color-warning, #f59e0b);
}
.abt-winner-banner__icon {
    font-size: 24px;
    color: var(--color-warning, #f59e0b);
}
.abt-winner-banner__text strong {
    display: block;
    font-size: var(--font-size-lg);
    font-family: var(--font-display);
}
.abt-winner-banner__text span {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ── Score Cards ── */
.abt-scores {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.abt-score-card {
    background: var(--color-white, #fff);
    border: 1px solid var(--color-gray-200, #e2e8f0);
    border-radius: 12px;
    padding: var(--space-5);
    text-align: center;
    transition: all 150ms ease;
}
.abt-score-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.abt-score-card__header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    justify-content: center;
}
.abt-score-card__title {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
}

/* ── Score Ring ── */
.abt-score-card__ring {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-3);
}

.abt-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.abt-ring__bg {
    fill: none;
    stroke: var(--color-gray-100, #f1f5f9);
    stroke-width: 6;
}

.abt-ring__fill {
    fill: none;
    stroke-width: 6;
    stroke-linecap: round;
    transition: stroke-dashoffset 800ms ease;
}

.abt-score-card__number {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 800;
    color: var(--color-gray-800);
    transition: color 300ms ease;
}

.abt-score-card__label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

/* ── Breakdown Bars ── */
.abt-score-card__breakdown {
    text-align: left;
}

.abt-breakdown-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.abt-breakdown-label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    width: 80px;
    flex-shrink: 0;
}

.abt-breakdown-bar {
    flex: 1;
    height: 6px;
    background: var(--color-gray-100, #f1f5f9);
    border-radius: 3px;
    overflow: hidden;
}

.abt-breakdown-bar__fill {
    height: 100%;
    border-radius: 3px;
    transition: width 600ms ease;
}

.abt-breakdown-value {
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    width: 36px;
    text-align: right;
    flex-shrink: 0;
    font-weight: 600;
}

/* ── Detail Table ── */
.abt-detail-table {
    margin-bottom: var(--space-6);
}

.abt-detail-table__title {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-3);
    color: var(--color-gray-700);
}
.abt-detail-table__title i {
    color: var(--color-primary, #4F46E5);
    margin-right: var(--space-2);
}

.abt-detail-table__wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.abt-factor-name {
    font-weight: 600;
    color: var(--color-gray-700);
    white-space: nowrap;
}

.abt-col-a {
    color: var(--color-primary, #4F46E5);
    font-weight: 600;
}
.abt-col-b {
    color: var(--color-success, #10b981);
    font-weight: 600;
}

.abt-cell-win {
    background: rgba(79, 70, 229, 0.04);
    font-weight: 600;
}

/* ── Tips Section ── */
.abt-tips-section {
    margin-bottom: var(--space-6);
}
.abt-tips-section__title {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-3);
    color: var(--color-gray-700);
}
.abt-tips-section__title i {
    color: var(--color-warning, #f59e0b);
    margin-right: var(--space-2);
}

.abt-tip-item {
    padding: var(--space-3) var(--space-4);
    background: rgba(245, 158, 11, 0.06);
    border-radius: 8px;
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    line-height: 1.5;
}
.abt-tip-item i {
    color: var(--color-warning, #f59e0b);
    margin-right: var(--space-2);
}

/* ── Action Buttons ── */
.abt-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-100, #f1f5f9);
}

.abt-action-btn {
    font-size: var(--font-size-sm) !important;
}

/* ═══════════════════════════════════════════════════════════
   PREVIEW TAB
   ═══════════════════════════════════════════════════════════ */

.abt-preview-upload {
    margin-bottom: var(--space-4);
}

.abt-upload-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4);
    border: 2px dashed var(--color-gray-200, #e2e8f0);
    border-radius: 8px;
    cursor: pointer;
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    transition: all 150ms ease;
}
.abt-upload-area:hover,
.abt-upload-area--dragover {
    border-color: var(--color-primary, #4F46E5);
    color: var(--color-primary, #4F46E5);
    background: rgba(79, 70, 229, 0.03);
}

.abt-preview-channel {
    margin-bottom: var(--space-6);
    max-width: 300px;
}

.abt-preview-heading {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
    margin-bottom: var(--space-3);
    margin-top: var(--space-6);
}
.abt-preview-heading:first-of-type {
    margin-top: 0;
}
.abt-preview-heading i {
    color: var(--color-gray-400);
    margin-right: var(--space-2);
}

/* ── YouTube Card Previews ── */
.abt-preview-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.abt-yt-card {
    position: relative;
    background: var(--color-white, #fff);
    border: 1px solid var(--color-gray-200, #e2e8f0);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 150ms ease;
}
.abt-yt-card:hover {
    transform: translateY(-1px);
}

.abt-yt-card__badge {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-white, #fff);
}

/* ── Search Layout ── */
.abt-yt-card--search {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-3);
}
.abt-yt-card--search .abt-yt-thumb {
    width: 168px;
    min-width: 168px;
    height: 94px;
    border-radius: 8px;
    background: var(--color-gray-100, #f1f5f9);
    position: relative;
}
.abt-yt-card--search .abt-yt-card__badge {
    position: static;
    margin-bottom: var(--space-1);
}
.abt-yt-meta {
    flex: 1;
    min-width: 0;
}
.abt-yt-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-900);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-1);
    word-break: break-word;
}
.abt-yt-channel {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: 2px;
}
.abt-yt-stats {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

/* ── Feed Layout ── */
.abt-yt-card--feed {
    padding: 0;
}
.abt-yt-thumb--feed {
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 */
    background: var(--color-gray-100, #f1f5f9);
    position: relative;
}
.abt-yt-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.8);
    color: var(--color-white, #fff);
    font-size: var(--font-size-xs);
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}
.abt-yt-feed-meta {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3);
}
.abt-yt-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-gray-200, #e2e8f0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    flex-shrink: 0;
}
.abt-yt-title--feed {
    font-size: var(--font-size-sm);
    -webkit-line-clamp: 2;
}

/* ── Mobile Layout ── */
.abt-preview-pair--mobile {
    max-width: 600px;
}
.abt-yt-card--mobile {
    padding: 0;
}
.abt-yt-thumb--mobile {
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    background: var(--color-gray-100, #f1f5f9);
    position: relative;
}
.abt-yt-feed-meta--mobile {
    padding: var(--space-2);
}
.abt-yt-avatar--mobile {
    width: 28px;
    height: 28px;
    font-size: var(--font-size-xs);
}
.abt-yt-title--mobile {
    font-size: var(--font-size-xs);
    -webkit-line-clamp: 2;
}
.abt-yt-channel--mobile {
    font-size: var(--font-size-xs);
}
.abt-yt-stats--mobile {
    font-size: var(--font-size-xs);
}

/* Thumbnail with uploaded image */
.abt-yt-thumb--has-image {
    background-color: transparent;
}

/* ═══════════════════════════════════════════════════════════
   HISTORY TAB
   ═══════════════════════════════════════════════════════════ */

.abt-history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.abt-history-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.abt-history-item {
    background: var(--color-white, #fff);
    border: 1px solid var(--color-gray-200, #e2e8f0);
    border-radius: 8px;
    padding: var(--space-4);
    transition: all 150ms ease;
}
.abt-history-item:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-sm);
}

.abt-history-item__header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}
.abt-history-item__date {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}
.abt-history-item__kw {
    font-size: var(--font-size-xs);
}
.abt-history-load {
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-primary, #4F46E5);
    padding: var(--space-1) var(--space-2);
    border-radius: 4px;
    transition: all 150ms ease;
}
.abt-history-load:hover {
    background: rgba(79, 70, 229, 0.08);
}

.abt-history-item__titles {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.abt-history-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: 6px;
    background: var(--color-gray-50, #f8fafc);
    font-size: var(--font-size-sm);
}
.abt-history-title--winner {
    background: rgba(79, 70, 229, 0.05);
    font-weight: 600;
}
.abt-history-title__text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.abt-history-title__score {
    font-weight: 700;
    font-family: var(--font-display);
    color: var(--color-gray-600);
    flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — MOBILE (375px floor)
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 767px) {
    .abt-scores {
        grid-template-columns: 1fr;
    }

    .abt-score-card__ring {
        width: 100px;
        height: 100px;
    }
    .abt-score-card__number {
        font-size: 26px;
    }

    .abt-breakdown-label {
        width: 65px;
        font-size: var(--font-size-xs);
    }

    .abt-winner-banner {
        padding: var(--space-3) var(--space-4);
    }
    .abt-winner-banner__icon {
        font-size: 20px;
    }
    .abt-winner-banner__text strong {
        font-size: var(--font-size-base);
    }

    .abt-preview-pair {
        grid-template-columns: 1fr;
    }

    .abt-yt-card--search {
        flex-direction: column;
    }
    .abt-yt-card--search .abt-yt-thumb {
        width: 100%;
        min-width: 0;
        height: 0;
        padding-bottom: 56.25%;
    }

    .abt-actions {
        flex-direction: column;
    }
    .abt-action-btn {
        width: 100%;
        justify-content: center;
    }

    .abt-detail-table .table th,
    .abt-detail-table .table td {
        font-size: var(--font-size-xs);
        padding: var(--space-2);
    }

    .abt-history-title__text {
        max-width: 160px;
    }
}

@media (max-width: 480px) {
    .abt-score-card {
        padding: var(--space-3);
    }

    .abt-preview-pair--mobile {
        max-width: 100%;
    }
}