.page-header {
    margin-bottom: 28px;
}

.page-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.page-description {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.chart-container {
    height: 300px;
    padding: 16px;
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.chart-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.video-preview {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.video-preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
}

.video-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 20px;
}

.video-info-item {
    background: var(--bg-secondary);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
}

.video-info-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.video-info-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.analysis-progress {
    margin: 24px 0;
}

.progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.progress-label {
    font-size: 0.9375rem;
    color: var(--text-primary);
    font-weight: 500;
}

.progress-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--primary);
}

.progress-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}

.progress-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.step-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8125rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-icon.pending {
    background: var(--bg-tertiary);
    color: var(--text-quaternary);
}

.step-icon.active {
    background: var(--primary-light);
    color: var(--primary);
    animation: pulse 2s infinite;
}

.step-icon.completed {
    background: var(--success-light);
    color: var(--success);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 122, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(0, 122, 255, 0);
    }
}

.step-content {
    flex: 1;
    padding-top: 4px;
}

.step-title {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.step-description {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.score-card {
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 28px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-primary) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.08), 0 4px 16px rgba(0, 0, 0, 0.04);
}

.score-circle {
    width: 120px;
    height: 120px;
    position: relative;
    filter: drop-shadow(0 4px 12px rgba(0, 122, 255, 0.2));
}

.score-circle svg {
    transform: rotate(-90deg);
}

.score-circle-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 8;
}

.score-circle-progress {
    fill: none;
    stroke: url(#scoreGradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.score-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, #5856D6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}

.score-info h3 {
    font-size: 1.25rem;
    margin-bottom: 6px;
}

.score-info p {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    margin: 0;
}

.score-breakdown {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.score-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.score-item-value {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
    letter-spacing: -0.02em;
}

.score-item-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.behavior-timeline {
    position: relative;
    padding-left: 32px;
}

.behavior-timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: var(--bg-tertiary);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    padding-bottom: 20px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, #5856D6 100%);
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 0 3px var(--primary-light), 0 2px 4px rgba(0, 122, 255, 0.2);
}

.timeline-time {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    font-weight: 500;
}

.timeline-content {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.suggestion-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.suggestion-item {
    display: flex;
    gap: 14px;
    padding: 18px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 3px solid transparent;
    background-image: linear-gradient(var(--bg-secondary), var(--bg-secondary)), linear-gradient(180deg, var(--primary) 0%, #5856D6 100%);
    background-origin: padding-box, border-box;
    background-clip: padding-box, border-box;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.suggestion-item:hover {
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.suggestion-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(0, 122, 255, 0.15) 100%);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8125rem;
    font-weight: 600;
    flex-shrink: 0;
    box-shadow: 0 2px 4px rgba(0, 122, 255, 0.15);
}

.suggestion-content {
    flex: 1;
}

.suggestion-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.suggestion-text {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin: 0;
}

.homework-compare {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: center;
}

.homework-card {
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
}

.homework-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.homework-card-title {
    font-size: 1rem;
    font-weight: 600;
}

.compare-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-primary);
    border-radius: 50%;
    box-shadow: var(--shadow-md);
}

.compare-arrow svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.compare-result {
    background: linear-gradient(135deg, var(--success-light) 0%, var(--bg-primary) 100%);
    border-radius: var(--radius-xl);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.compare-result-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--success);
    letter-spacing: -0.03em;
}

.compare-result-label {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
    margin-top: 6px;
}

.report-section {
    margin-bottom: 28px;
}

.report-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.report-meta {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.report-meta-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.report-meta-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.report-meta-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.report-actions {
    display: flex;
    gap: 12px;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 18px 22px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.history-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary) 0%, #5856D6 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.history-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.12), 0 2px 8px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

.history-item:hover::before {
    opacity: 1;
}

.history-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(0, 122, 255, 0.12) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 122, 255, 0.1);
}

.history-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.history-content {
    flex: 1;
}

.history-title {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.history-meta {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.history-score {
    text-align: right;
}

.history-score-value {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, #5856D6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.history-score-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.settings-section {
    margin-bottom: 28px;
}

.settings-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.settings-item-label {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.settings-item-hint {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

@media (max-width: 1200px) {
    .dashboard-stats,
    .score-breakdown {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .report-meta {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .score-card {
        flex-direction: column;
        text-align: center;
    }
    
    .homework-compare {
        grid-template-columns: 1fr;
    }
    
    .compare-arrow {
        transform: rotate(90deg);
        margin: 0 auto;
    }
}

.progress-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.main-progress {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.progress-stages {
    display: flex;
    justify-content: space-between;
    margin-top: 24px;
    position: relative;
}

.progress-stages::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--bg-tertiary);
    z-index: 0;
}

.progress-stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
}

.stage-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 12px;
}

.stage-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-strong);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.stage-line {
    width: 2px;
    height: 0;
    background: var(--primary);
    transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: -2px;
}

.progress-stage[data-stage="complete"] .stage-line {
    display: none;
}

.progress-stage.active .stage-dot {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.2);
    animation: pulse 2s infinite;
}

.progress-stage.completed .stage-dot {
    background: var(--success);
    border-color: var(--success);
}

.progress-stage.completed .stage-dot::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.progress-stage.completed .stage-line {
    height: 20px;
}

.progress-stage.error .stage-dot {
    background: var(--danger);
    border-color: var(--danger);
    animation: shake 0.5s ease-in-out;
}

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

.stage-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    transition: color 0.3s ease;
}

.progress-stage.active .stage-title,
.progress-stage.completed .stage-title {
    color: var(--text-primary);
}

.stage-description {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    max-width: 120px;
}

.sub-progress {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 20px;
    animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: top;
}

.sub-progress-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.sub-progress-icon {
    color: var(--primary);
    animation: rotate 1s linear infinite;
}

.sub-progress-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.progress-sub {
    height: 8px;
    margin-bottom: 16px;
}

.segment-progress {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.segment-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    animation: fadeIn 0.3s ease;
}

.segment-item.pending {
    opacity: 0.5;
}

.segment-item.analyzing {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 500;
}

.segment-item.completed {
    border-color: var(--success);
    background: var(--success-light);
    color: var(--success);
}

.segment-item.error {
    border-color: var(--danger);
    background: var(--danger-light);
    color: var(--danger);
}

.segment-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.segment-item.analyzing .segment-dot {
    animation: pulse 1s infinite;
}

.progress-error {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--danger-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--danger);
    animation: shake 0.5s ease-in-out;
}

.error-icon {
    color: var(--danger);
    flex-shrink: 0;
    margin-top: 2px;
}

.error-content {
    flex: 1;
}

.error-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--danger);
    margin-bottom: 4px;
}

.error-message {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.progress-main.error .progress-bar {
    background: linear-gradient(90deg, var(--danger) 0%, #FF6B6B 100%);
}

.progress-sub.error .progress-bar {
    background: linear-gradient(90deg, var(--danger) 0%, #FF6B6B 100%);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 122, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(0, 122, 255, 0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: scaleY(0);
    }
    to {
        opacity: 1;
        transform: scaleY(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-5px);
    }
    75% {
        transform: translateX(5px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes slideUp {
    from {
        opacity: 1;
        transform: scaleY(1);
    }
    to {
        opacity: 0;
        transform: scaleY(0);
    }
}