:root {
    --primary-color: #0e7e94;
    --secondary-color: #0a6475;
    --accent-color: #14b8c4;
    --h1-color: #0b1120;
    --h2-color: #111827;
    --h3-color: #1f2937;
    --h4-color: #374151;
    --paragraph-color: #4b5563;
    --bg-color: #ffffff;
    --border-color: #e5e7eb;
    --default-border: #dbe4ea;
    --soft-border: #e8f2f4;
    --hover-border: #0e7e94;
    --focus-border: #0a6475;
    --btn-primary-bg: #0e7e94;
    --btn-primary-hover: #0a6475;
    --btn-primary-text: #ffffff;
    --btn-secondary-bg: #e8f2f4;
    --btn-secondary-hover: #0e7e94;
    --btn-secondary-text: #0e7e94;
    --btn-secondary-hover-text: #ffffff;
    --font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.duplicate-sentences-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: var(--font-family);
}

.duplicate-sentences-card {
    background: var(--bg-color);
    border: 1px solid var(--default-border);
    border-radius: 10px;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.1);
    transition: box-shadow 0.3s ease;
}

.duplicate-sentences-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.duplicate-sentences-header {
    margin-bottom: 28px;
    text-align: center;
}

.duplicate-sentences-title {
    color: var(--h2-color);
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 12px;
    letter-spacing: -0.5px;
}

.duplicate-sentences-description {
    color: var(--paragraph-color);
    font-size: 16px;
    line-height: 1.5;
}

.duplicate-sentences-options {
    margin-bottom: 24px;
    padding: 16px;
    background: var(--soft-border);
    border-radius: 8px;
}

.duplicate-sentences-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    margin-bottom: 8px;
}

.duplicate-sentences-checkbox-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.duplicate-sentences-checkbox-label {
    color: var(--h3-color);
    font-size: 14px;
    font-weight: 600;
}

.duplicate-sentences-option-hint {
    margin-left: 28px;
}
.duplicate-sentences-option-hint small {
    color: var(--paragraph-color);
    font-size: 12px;
}

/* File Upload */
.duplicate-sentences-file-upload {
    margin-bottom: 24px;
}
.duplicate-sentences-file-upload-area {
    border: 2px dashed var(--default-border);
    border-radius: 10px;
    padding: 15px 20px;
    text-align: center;
    background: var(--soft-border);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}
.duplicate-sentences-file-upload-area:hover {
    border-color: var(--hover-border);
    background: var(--bg-color);
}
.duplicate-sentences-file-upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(14,126,148,0.05);
}
.duplicate-sentences-file-upload-icon {
    font-size: 24px;
}
.duplicate-sentences-file-upload-text {
    color: var(--paragraph-color);
    font-size: 13px;
    margin: 0;
}
.duplicate-sentences-file-upload-formats {
    color: var(--paragraph-color);
    font-size: 11px;
    margin: 0;
    opacity: 0.8;
}
.duplicate-sentences-file-info {
    margin-top: 10px;
    padding: 8px 15px;
    background: var(--soft-border);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.duplicate-sentences-file-name {
    color: var(--h3-color);
    font-size: 13px;
    font-weight: 500;
}
.duplicate-sentences-file-size {
    color: var(--paragraph-color);
    font-size: 12px;
}
.duplicate-sentences-file-remove {
    background: #ef4444;
    color: white;
    border: none;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.duplicate-sentences-file-remove:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* Stats */
.duplicate-sentences-stats, .duplicate-sentences-stats-secondary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}
.duplicate-sentences-stat {
    background: var(--soft-border);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}
.duplicate-sentences-stat-label {
    display: block;
    color: var(--paragraph-color);
    font-size: 13px;
    margin-bottom: 6px;
    font-weight: 500;
}
.duplicate-sentences-stat-value {
    display: inline-block;
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
}

/* Input/Output */
.duplicate-sentences-input-section,
.duplicate-sentences-output-section {
    margin-bottom: 24px;
}
.duplicate-sentences-output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 10px;
}
.duplicate-sentences-label {
    color: var(--h3-color);
    font-size: 14px;
    font-weight: 600;
}
.duplicate-sentences-copy-btn {
    background: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border: none;
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all 0.3s ease;
}
.duplicate-sentences-copy-btn:hover {
    background: var(--btn-secondary-hover);
    color: var(--btn-secondary-hover-text);
    transform: translateY(-1px);
}
.duplicate-sentences-textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    font-family: var(--font-family);
    color: var(--h4-color);
    background: var(--bg-color);
    border: 1px solid var(--default-border);
    border-radius: 10px;
    transition: all 0.3s ease;
    resize: vertical;
    line-height: 1.6;
}
.duplicate-sentences-textarea:focus {
    outline: none;
    border-color: var(--focus-border);
    box-shadow: 0 0 0 3px rgba(10,100,117,0.1);
}
.duplicate-sentences-textarea:hover {
    border-color: var(--hover-border);
}
.duplicate-sentences-output {
    background: var(--soft-border);
    cursor: default;
}
.duplicate-sentences-output:focus {
    border-color: var(--default-border);
    box-shadow: none;
}

/* ========== BUTTON FIX – OVERRIDE ALL BROWSER DEFAULT BLUE ========== */
/* Reset all default button styles including focus, active, focus-visible */
button,
button:link,
button:visited,
button:focus,
button:focus-visible,
button:focus-within,
button:active,
button:hover,
.duplicate-sentences-btn,
.duplicate-sentences-btn:link,
.duplicate-sentences-btn:visited,
.duplicate-sentences-btn:focus,
.duplicate-sentences-btn:focus-visible,
.duplicate-sentences-btn:focus-within,
.duplicate-sentences-btn:active,
.duplicate-sentences-btn:hover,
#browse-file-btn,
#browse-file-btn:link,
#browse-file-btn:visited,
#browse-file-btn:focus,
#browse-file-btn:focus-visible,
#browse-file-btn:focus-within,
#browse-file-btn:active,
#browse-file-btn:hover,
.duplicate-sentences-copy-btn,
.duplicate-sentences-copy-btn:link,
.duplicate-sentences-copy-btn:visited,
.duplicate-sentences-copy-btn:focus,
.duplicate-sentences-copy-btn:focus-visible,
.duplicate-sentences-copy-btn:focus-within,
.duplicate-sentences-copy-btn:active,
.duplicate-sentences-copy-btn:hover {
    outline: none !important;
    box-shadow: none !important;
    -webkit-tap-highlight-color: transparent !important;
    text-decoration: none !important;
}

/* Primary Button – ALL states */
.duplicate-sentences-btn-primary,
.duplicate-sentences-btn-primary:link,
.duplicate-sentences-btn-primary:visited,
.duplicate-sentences-btn-primary:focus,
.duplicate-sentences-btn-primary:focus-visible,
.duplicate-sentences-btn-primary:focus-within,
.duplicate-sentences-btn-primary:active {
    background: var(--btn-primary-bg) !important;
    color: var(--btn-primary-text) !important;
    border: none !important;
}
.duplicate-sentences-btn-primary:hover {
    background: var(--btn-primary-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(14,126,148,0.3) !important;
}

/* Secondary Buttons (Swap, Clear, Browse File, Copy) – ALL states */
.duplicate-sentences-btn-secondary,
.duplicate-sentences-btn-secondary:link,
.duplicate-sentences-btn-secondary:visited,
.duplicate-sentences-btn-secondary:focus,
.duplicate-sentences-btn-secondary:focus-visible,
.duplicate-sentences-btn-secondary:focus-within,
.duplicate-sentences-btn-secondary:active,
#browse-file-btn,
#browse-file-btn:link,
#browse-file-btn:visited,
#browse-file-btn:focus,
#browse-file-btn:focus-visible,
#browse-file-btn:focus-within,
#browse-file-btn:active,
.duplicate-sentences-copy-btn,
.duplicate-sentences-copy-btn:link,
.duplicate-sentences-copy-btn:visited,
.duplicate-sentences-copy-btn:focus,
.duplicate-sentences-copy-btn:focus-visible,
.duplicate-sentences-copy-btn:focus-within,
.duplicate-sentences-copy-btn:active {
    background: var(--btn-secondary-bg) !important;
    color: var(--btn-secondary-text) !important;
    border: none !important;
}
.duplicate-sentences-btn-secondary:hover,
#browse-file-btn:hover,
.duplicate-sentences-copy-btn:hover {
    background: var(--btn-secondary-hover) !important;
    color: var(--btn-secondary-hover-text) !important;
    transform: translateY(-1px);
}

/* Example buttons – no blue */
.duplicate-sentences-example-btn,
.duplicate-sentences-example-btn:link,
.duplicate-sentences-example-btn:visited,
.duplicate-sentences-example-btn:focus,
.duplicate-sentences-example-btn:focus-visible,
.duplicate-sentences-example-btn:focus-within,
.duplicate-sentences-example-btn:active {
    background: var(--soft-border) !important;
    color: var(--primary-color) !important;
    border: 1px solid var(--default-border) !important;
    outline: none !important;
}
.duplicate-sentences-example-btn:hover {
    background: var(--primary-color) !important;
    color: white !important;
    border-color: var(--primary-color) !important;
}

/* Remove file button (red) – stays red */
.duplicate-sentences-file-remove,
.duplicate-sentences-file-remove:link,
.duplicate-sentences-file-remove:visited,
.duplicate-sentences-file-remove:focus,
.duplicate-sentences-file-remove:focus-visible,
.duplicate-sentences-file-remove:focus-within,
.duplicate-sentences-file-remove:active {
    background: #ef4444 !important;
    color: white !important;
    border: none !important;
    outline: none !important;
}
.duplicate-sentences-file-remove:hover {
    background: #dc2626 !important;
}

/* Actions container */
.duplicate-sentences-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.duplicate-sentences-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-family);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

/* Examples section */
.duplicate-sentences-examples {
    padding-top: 24px;
    border-top: 1px solid var(--soft-border);
    margin-bottom: 20px;
}
.duplicate-sentences-examples-title {
    color: var(--h3-color);
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 16px;
}
.duplicate-sentences-examples-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.duplicate-sentences-example-btn {
    padding: 8px 16px;
    font-size: 13px;
    font-family: var(--font-family);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

/* Tips */
.duplicate-sentences-tips {
    background: var(--soft-border);
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}
.duplicate-sentences-tip {
    color: var(--h4-color);
    font-size: 13px;
    line-height: 1.5;
}
.duplicate-sentences-tip strong {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .duplicate-sentences-card { padding: 24px; }
    .duplicate-sentences-title { font-size: 24px; }
    .duplicate-sentences-stats, .duplicate-sentences-stats-secondary { grid-template-columns: repeat(2,1fr); gap:12px; }
    .duplicate-sentences-stat-value { font-size: 20px; }
    .duplicate-sentences-actions { flex-direction: column; }
    .duplicate-sentences-btn { width: 100%; }
    .duplicate-sentences-examples-list { flex-direction: column; }
    .duplicate-sentences-example-btn { width: 100%; text-align: center; }
    .duplicate-sentences-output-header { flex-direction: column; align-items: flex-start; }
    .duplicate-sentences-copy-btn { width: 100%; }
    .duplicate-sentences-file-upload-area { flex-direction: column; gap: 8px; padding: 12px 15px; }
    .duplicate-sentences-file-info { flex-direction: column; text-align: center; }
    .duplicate-sentences-file-remove { width: 100%; }
}
@media (max-width: 480px) {
    .duplicate-sentences-card { padding: 20px; }
    .duplicate-sentences-stats, .duplicate-sentences-stats-secondary { grid-template-columns: 1fr; }
}

@keyframes fadeIn {
    from { opacity:0; transform:translateY(10px); }
    to { opacity:1; transform:translateY(0); }
}
.duplicate-sentences-container {
    animation: fadeIn 0.5s ease-in;
}