: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;
    --remove-btn-bg: #ef4444;
    --remove-btn-hover: #dc2626;
    --duplicate-bg: #fee2e2;
    --duplicate-color: #dc2626;
    --unique-bg: #d1fae5;
    --unique-color: #059669;
    --font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.hashtag-checker-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    font-family: var(--font-family);
}
.hashtag-checker-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;
}
.hashtag-checker-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.hashtag-checker-header {
    margin-bottom: 28px;
    text-align: center;
}
.hashtag-checker-title {
    color: var(--h2-color);
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 12px;
    letter-spacing: -0.5px;
}
.hashtag-checker-description {
    color: var(--paragraph-color);
    font-size: 16px;
    line-height: 1.5;
}
.hashtag-checker-input-group {
    margin-bottom: 24px;
}
.hashtag-checker-label {
    display: block;
    color: var(--h3-color);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}
.hashtag-checker-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;
}
.hashtag-checker-textarea:focus {
    outline: none;
    border-color: var(--focus-border);
    box-shadow: 0 0 0 3px rgba(14,126,148,0.1);
}
.hashtag-checker-textarea:hover {
    border-color: var(--hover-border);
}
.hashtag-checker-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px,1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.hashtag-checker-stat {
    background: var(--soft-border);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}
.hashtag-checker-stat-label {
    display: block;
    color: var(--paragraph-color);
    font-size: 13px;
    margin-bottom: 6px;
    font-weight: 500;
}
.hashtag-checker-stat-value {
    display: inline-block;
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
}
.hashtag-checker-stat-unit {
    display: inline-block;
    color: var(--paragraph-color);
    font-size: 14px;
    margin-left: 4px;
}
.hashtag-checker-progress {
    width: 100%;
    height: 8px;
    background: var(--soft-border);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 24px;
}
.hashtag-checker-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--primary-color);
    transition: width 0.3s ease, background 0.3s ease;
    border-radius: 10px;
}
.hashtag-checker-message {
    padding: 14px;
    border-radius: 8px;
    margin-bottom: 24px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}
.hashtag-checker-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.hashtag-checker-message.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}
.hashtag-checker-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}
.hashtag-checker-detected-section {
    margin-bottom: 24px;
    padding: 20px;
    background: var(--soft-border);
    border-radius: 10px;
    border: 1px solid var(--default-border);
}
.hashtag-checker-detected-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}
.hashtag-checker-detected-title {
    color: var(--h3-color);
    font-size: 16px;
    font-weight: 600;
    margin: 0;
}
.hashtag-checker-remove-btn {
    background: var(--remove-btn-bg);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all 0.3s ease;
}
.hashtag-checker-remove-btn:hover {
    background: var(--remove-btn-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(220,38,38,0.3);
}
.hashtag-checker-remove-btn:focus, .hashtag-checker-remove-btn:active {
    outline: none;
}
.hashtag-checker-detected-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    max-height: 200px;
    overflow-y: auto;
    padding: 5px;
}
.hashtag-checker-empty {
    color: var(--paragraph-color);
    text-align: center;
    width: 100%;
    padding: 20px;
    font-size: 14px;
}
.hashtag-checker-hashtag {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}
.hashtag-checker-hashtag.unique {
    background: var(--unique-bg);
    color: var(--unique-color);
    border: 1px solid #a7f3d0;
}
.hashtag-checker-hashtag.duplicate {
    background: var(--duplicate-bg);
    color: var(--duplicate-color);
    border: 1px solid #fecaca;
    text-decoration: line-through;
}
.hashtag-checker-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.hashtag-checker-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-family);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}
/* BUTTON FIX */
button, button:link, button:visited, button:focus, button:focus-visible, button:active,
.hashtag-checker-btn, .hashtag-checker-btn:link, .hashtag-checker-btn:visited,
.hashtag-checker-btn:focus, .hashtag-checker-btn:focus-visible, .hashtag-checker-btn:active {
    outline: none !important;
    box-shadow: none !important;
}
.hashtag-checker-btn-primary,
.hashtag-checker-btn-primary:link,
.hashtag-checker-btn-primary:visited,
.hashtag-checker-btn-primary:focus,
.hashtag-checker-btn-primary:focus-visible,
.hashtag-checker-btn-primary:active {
    background: var(--btn-primary-bg) !important;
    color: var(--btn-primary-text) !important;
    border: none !important;
}
.hashtag-checker-btn-primary:hover {
    background: var(--btn-primary-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(14,126,148,0.3) !important;
}
.hashtag-checker-btn-secondary,
.hashtag-checker-btn-secondary:link,
.hashtag-checker-btn-secondary:visited,
.hashtag-checker-btn-secondary:focus,
.hashtag-checker-btn-secondary:focus-visible,
.hashtag-checker-btn-secondary:active {
    background: var(--btn-secondary-bg) !important;
    color: var(--btn-secondary-text) !important;
    border: none !important;
}
.hashtag-checker-btn-secondary:hover {
    background: var(--btn-secondary-hover) !important;
    color: var(--btn-secondary-hover-text) !important;
    transform: translateY(-1px);
}
.hashtag-checker-examples {
    padding-top: 24px;
    border-top: 1px solid var(--soft-border);
    margin-bottom: 20px;
}
.hashtag-checker-examples-title {
    color: var(--h3-color);
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 16px;
}
.hashtag-checker-examples-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.hashtag-checker-example-btn {
    background: var(--soft-border);
    color: var(--primary-color);
    border: 1px solid var(--default-border);
    padding: 8px 16px;
    font-size: 13px;
    font-family: var(--font-family);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.hashtag-checker-example-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}
.hashtag-checker-example-btn:focus, .hashtag-checker-example-btn:active {
    outline: none;
}
.hashtag-checker-tips {
    background: var(--soft-border);
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}
.hashtag-checker-tip {
    color: var(--h4-color);
    font-size: 13px;
    line-height: 1.5;
}
.hashtag-checker-tip strong {
    color: var(--primary-color);
}
@media (max-width: 768px) {
    .hashtag-checker-card { padding: 24px; }
    .hashtag-checker-title { font-size: 24px; }
    .hashtag-checker-stats { grid-template-columns: repeat(2,1fr); gap:12px; }
    .hashtag-checker-stat-value { font-size: 20px; }
    .hashtag-checker-buttons { flex-direction: column; }
    .hashtag-checker-btn { width: 100%; }
    .hashtag-checker-examples-list { flex-direction: column; }
    .hashtag-checker-example-btn { width: 100%; text-align: center; }
    .hashtag-checker-detected-list { max-height: 150px; }
    .hashtag-checker-detected-header { flex-direction: column; align-items: stretch; }
    .hashtag-checker-remove-btn { width: 100%; }
}
@media (max-width: 480px) {
    .hashtag-checker-card { padding: 20px; }
    .hashtag-checker-stats { grid-template-columns: 1fr; }
}
@keyframes fadeIn {
    from { opacity:0; transform:translateY(10px); }
    to { opacity:1; transform:translateY(0); }
}
.hashtag-checker-container {
    animation: fadeIn 0.5s ease-in;
}