:root {
    --bg-color: #f0f2f5;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-primary: #1a1a1a;
    --text-secondary: #64748b;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --error-color: #ef4444;
    --success-color: #10b981;
    --border-radius: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --glass-border: 1px solid rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #f0f2f5 0%, #e2e8f0 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.6s ease-out;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    border-radius: 50px;
    border: var(--glass-border);
}

.back-link:hover {
    color: var(--accent-color);
    transform: translateX(-4px);
    background: #fff;
}

.back-link svg {
    width: 18px;
    height: 18px;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #1e293b, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.app-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 2rem;
    align-items: start;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: var(--glass-border);
    box-shadow: var(--glass-shadow);
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

textarea, input[type="text"] {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.5);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
    resize: vertical;
}

textarea:focus, input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.options-group {
    margin-bottom: 2rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
}

.checkbox-item input {
    width: 18px;
    height: 18px;
    border-radius: 4px;
    cursor: pointer;
}

.checkbox-item label {
    margin-bottom: 0;
    cursor: pointer;
}

.primary-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.primary-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.primary-btn:active {
    transform: translateY(0);
}

.primary-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.tip-box {
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    background: rgba(59, 130, 246, 0.05);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.tip-box small {
    color: var(--text-secondary);
    line-height: 1.4;
    display: block;
}

.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s linear infinite;
}

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

.hidden {
    display: none !important;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.results-panel {
    min-height: 500px;
}

.placeholder-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: var(--text-secondary);
    text-align: center;
    opacity: 0.6;
}

.placeholder-msg svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
}

.page-result {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    border: var(--glass-border);
    box-shadow: var(--glass-shadow);
    margin-bottom: 2rem;
    animation: fadeInUp 0.5s ease-out forwards;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.page-url {
    font-weight: 700;
    color: var(--text-primary);
    word-break: break-all;
}

.typo-count {
    background: #fee2e2;
    color: #ef4444;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.typo-count.zero {
    background: #dcfce7;
    color: #10b981;
}

.error-categories {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.category-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(0, 0, 0, 0.03);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.typo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.typo-item {
    background: #fff;
    padding: 1.25rem;
    border-radius: 16px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    position: relative;
    cursor: pointer;
    overflow: hidden;
}

.typo-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.typo-item.ignored {
    opacity: 0.4;
    filter: grayscale(1);
}

.ignore-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--text-secondary);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.typo-item.ignored .ignore-overlay {
    opacity: 1;
}

.misspelled-word {
    color: var(--error-color);
    font-weight: 700;
    text-decoration: underline wavy;
    margin-bottom: 0.5rem;
    display: block;
    font-size: 1.1rem;
}

.typo-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.context-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    background: #f1f5f9;
    color: #475569;
    border-radius: 4px;
}

.line-tag {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.05);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.link-error {
    border-left: 4px solid #f59e0b;
}

.spelling-error {
    border-left: 4px solid #ef4444;
}

.link-code {
    display: block;
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: #f8fafc;
    border-radius: 6px;
    font-size: 0.75rem;
    color: #64748b;
    word-break: break-all;
    border: 1px dashed rgba(0, 0, 0, 0.1);
}

.context-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: block;
}

.context-text mark {
    background: #fee2e2;
    color: #ef4444;
    font-weight: 600;
    padding: 0 2px;
    border-radius: 2px;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 968px) {
    .app-grid {
        grid-template-columns: 1fr;
    }
}