:root {
    --az-primary: #4f46e5;
    --az-primary-dark: #4338ca;
    --az-bg: #f8f9fc;
    --az-border: #e2e5f1;
    --az-text: #1f2333;
    --az-muted: #6b7280;
    --az-green: #16a34a;
    --az-yellow: #d97706;
    --az-red: #dc2626;
}

.analyzer {
    max-width: 960px;
    margin: 0 auto;
    padding: 1.5rem 0 3rem;
}

.analyzer-intro h1 {
    font-weight: 700;
    color: var(--az-text);
}

.analyzer-intro p {
    color: var(--az-muted);
    max-width: 640px;
}

.analyzer-card {
    background: #fff;
    border: 1px solid var(--az-border);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 1px 3px rgba(16, 24, 40, 0.05);
    margin-top: 1.5rem;
}

.dropzone {
    border: 2px dashed var(--az-border);
    border-radius: 12px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color .15s ease, background-color .15s ease;
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.dragover {
    border-color: var(--az-primary);
    background-color: #f5f4ff;
    outline: none;
}

.dropzone-icon {
    font-size: 2.5rem;
    line-height: 1;
    margin-bottom: .5rem;
}

.dropzone-text {
    margin: 0;
    color: var(--az-text);
}

.dropzone-hint {
    margin: .25rem 0 0;
    color: var(--az-muted);
    font-size: .875rem;
}

.selected-file {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin-top: 1rem;
    padding: .6rem .9rem;
    background: var(--az-bg);
    border: 1px solid var(--az-border);
    border-radius: 10px;
    font-size: .925rem;
}

.selected-file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-clear {
    border: none;
    background: transparent;
    color: var(--az-muted);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 .25rem;
}

.btn-clear:hover {
    color: var(--az-red);
}

.analyze-btn {
    margin-top: 1.25rem;
    width: 100%;
    border: none;
    border-radius: 10px;
    padding: .8rem 1rem;
    font-weight: 600;
    font-size: 1rem;
    color: #fff;
    background: var(--az-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .6rem;
    transition: background-color .15s ease;
}

.analyze-btn:hover:not(:disabled) {
    background: var(--az-primary-dark);
}

.analyze-btn:disabled {
    background: #c7c9d9;
    cursor: not-allowed;
}

.spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, .4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: az-spin .7s linear infinite;
}

@keyframes az-spin {
    to { transform: rotate(360deg); }
}

.error-banner {
    margin-top: 1rem;
    padding: .75rem 1rem;
    border-radius: 10px;
    background: #fef2f2;
    color: var(--az-red);
    border: 1px solid #fecaca;
    font-size: .925rem;
}

.results {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.result-card {
    background: #fff;
    border: 1px solid var(--az-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(16, 24, 40, 0.05);
}

.result-card-wide {
    grid-column: 1 / -1;
}

.result-card h2 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--az-text);
}

.quick-analysis-body {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.score-badge {
    flex: 0 0 auto;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: #fff;
    background: var(--az-muted);
}

.score-badge.score-good { background: var(--az-green); }
.score-badge.score-mid { background: var(--az-yellow); }
.score-badge.score-bad { background: var(--az-red); }

.quick-analysis-details {
    flex: 1;
    margin: 0;
}

.quick-analysis-details dt {
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--az-muted);
    margin-top: .6rem;
}

.quick-analysis-details dt:first-child {
    margin-top: 0;
}

.quick-analysis-details dd {
    margin: .15rem 0 0;
    color: var(--az-text);
}

.grammar-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: .75rem;
    max-height: 320px;
    overflow-y: auto;
}

.grammar-item {
    border: 1px solid var(--az-border);
    border-left: 3px solid var(--az-red);
    border-radius: 8px;
    padding: .6rem .8rem;
}

.grammar-item-words {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-weight: 600;
    flex-wrap: wrap;
}

.grammar-wrong {
    color: var(--az-red);
    text-decoration: line-through;
}

.grammar-arrow {
    color: var(--az-muted);
}

.grammar-suggestion {
    color: var(--az-green);
}

.grammar-explanation {
    margin: .35rem 0 0;
    color: var(--az-muted);
    font-size: .9rem;
}

.empty-hint {
    color: var(--az-muted);
    margin: 0;
}

.card-error {
    margin: 0;
    color: var(--az-red);
    font-size: .9rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.stat-tile {
    background: var(--az-bg);
    border: 1px solid var(--az-border);
    border-radius: 10px;
    padding: .9rem 1rem;
}

.stat-tile .stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--az-text);
}

.stat-tile .stat-label {
    font-size: .8rem;
    color: var(--az-muted);
    margin-top: .15rem;
}

.top-words {
    margin-top: 1.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
}

.top-word-chip {
    background: #eef2ff;
    color: var(--az-primary-dark);
    border-radius: 999px;
    padding: .3rem .7rem;
    font-size: .85rem;
    font-weight: 500;
}

.d-none {
    display: none !important;
}

@media (max-width: 720px) {
    .results {
        grid-template-columns: 1fr;
    }

    .quick-analysis-body {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

.error-page {
    max-width: 480px;
    margin: 3.5rem auto;
    padding: 0 1rem;
}

.error-card {
    background: #fff;
    border: 1px solid var(--az-border);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    box-shadow: 0 1px 3px rgba(16, 24, 40, 0.05);
    text-align: center;
}

.error-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 1rem;
}

.error-code {
    margin: 0 0 .35rem;
    color: var(--az-muted);
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.error-title {
    margin: 0 0 .6rem;
    font-weight: 700;
    color: var(--az-text);
}

.error-message {
    margin: 0;
    color: var(--az-muted);
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: .75rem;
    margin-top: 1.75rem;
    flex-wrap: wrap;
}

.error-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    padding: .7rem 1.25rem;
    font-weight: 600;
    font-size: .95rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}

.error-btn-primary {
    background: var(--az-primary);
    color: #fff;
}

.error-btn-primary:hover {
    background: var(--az-primary-dark);
    color: #fff;
}

.error-btn-secondary {
    background: #fff;
    color: var(--az-text);
    border: 1px solid var(--az-border);
}

.error-btn-secondary:hover {
    background: var(--az-bg);
    color: var(--az-text);
}

.error-request-id {
    margin: 1.5rem 0 0;
    color: var(--az-muted);
    font-size: .8rem;
}