/* Professional Irregular Verbs App - Modern Design System */

/* ===== CSS RESET & BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: #1e293b;
    font-feature-settings: "cv02", "cv03", "cv04", "cv11";
}

/* ===== DESIGN TOKENS ===== */
:root {
    /* Colors */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #67e8f9;
    --primary-400: #22d3ee;
    --primary-500: #06b6d4;
    --primary-600: #0891b2;
    --primary-700: #0e7490;
    --primary-800: #155e75;
    --primary-900: #164e63;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-200: #bbf7d0;
    --green-300: #86efac;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;

    --success-500: #10b981;
    --warning-500: #f59e0b;
    --error-500: #ef4444;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

/* ===== LAYOUT COMPONENTS ===== */
.app {
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, rgb(236, 253, 245) 0%, rgb(240, 249, 255) 50%, rgb(254, 252, 232) 100%)
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* ===== HEADER ===== */
.header {
    background: linear-gradient(135deg, rgb(6, 182, 212) 0%, rgb(103, 232, 249) 100%);
    color: white;
    padding: var(--space-2) 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><circle cx="30" cy="30" r="2"/></g></svg>');
    pointer-events: none;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.brand-icon {
    width: 56px;
    height: 56px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.brand-icon:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.2);
}

.brand-icon .material-icons {
    font-size: 28px;
    color: white;
}

.brand-title {
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.brand-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}



@media (max-width: 768px) {
    .brand-title {
        font-size: 1.5rem;
    }

    .brand-subtitle {
        font-size: 0.8rem;
    }
}

/* ===== MAIN CONTENT ===== */
.main {
    flex: 1;
    padding: var(--space-8) 0;
}

/* ===== SEARCH PANEL ===== */
.search-panel {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    border: 1px solid var(--gray-200);
}

.search-section {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
    margin-bottom: var(--space-6);
}

.search-bar {
    flex: 1;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    color: var(--gray-400);
    z-index: 10;
    font-size: 20px;
}

.search-input {
    width: 100%;
    padding: var(--space-4) var(--space-20) var(--space-4) var(--space-12);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 500;
    background: var(--gray-50);
    transition: var(--transition-normal);
    outline: none;
}

.search-input:focus {
    border-color: var(--primary-500);
    background: white;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.search-input::placeholder {
    color: var(--gray-400);
    font-weight: 400;
}

.search-clear-btn {
    position: absolute;
    right: var(--space-16);
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--gray-400);
    transition: var(--transition-normal);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-clear-btn:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.search-clear-btn:active {
    background: var(--gray-200);
    transform: translateY(-50%) scale(0.95);
}

.search-clear-btn .material-icons {
    font-size: 18px;
}

.search-results-badge {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-500);
    color: white;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.search-options {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    flex-shrink: 0;
}

.filters-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-5);
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    outline: none;
}

.filters-toggle:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
    color: var(--primary-700);
}

.filters-toggle:focus {
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.filters-badge {
    background: var(--primary-500);
    color: white;
    font-size: 0.75rem;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    min-width: 20px;
    text-align: center;
}

.toggle-icon {
    transition: transform var(--transition-normal);
    margin-left: var(--space-2);
}

.filters-toggle[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

/* ===== FILTERS PANEL ===== */
.filters-panel {
    border-top: 1px solid var(--gray-200);
    padding-top: var(--space-6);
    margin-top: var(--space-6);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.filter-label {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-select {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    background: white;
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition-normal);
    outline: none;
}

.filter-select:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.filter-checkboxes {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.signs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-2);
}

/* ===== CUSTOM CHECKBOX ===== */
.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.checkbox-wrapper:hover {
    background: var(--gray-50);
}

.checkbox-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition-fast);
    background: white;
    flex-shrink: 0;
}

.checkbox-input:checked + .checkbox-custom {
    background: var(--primary-500);
    border-color: var(--primary-500);
}

.checkbox-input:checked + .checkbox-custom::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-input:focus + .checkbox-custom {
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.checkbox-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    user-select: none;
}

/* ===== RESULTS SECTION ===== */
.results-section {
    margin-top: var(--space-8);
}

/* ===== MOBILE CARDS ===== */
.mobile-view {
    display: block;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-4);
}

.verb-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.verb-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-400) 0%, var(--primary-600) 100%);
    transform: scaleY(0);
    transition: var(--transition-normal);
}

.verb-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.verb-card:hover::before {
    transform: scaleY(1);
}

/* New compact card structure */
.verb-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
    min-height: 24px;
}

.meta-left {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.meta-right {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-wrap: wrap;
}

/* Three verb forms in a row */
.verb-forms-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.verb-form-box {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    text-align: center;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
}

.verb-form-box:hover {
    background: var(--primary-50);
    border-color: var(--primary-200);
}

.form-value {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--gray-800);
    line-height: 1.2;
}

/* Updated translation styles for compact cards */
.verb-translation {
    text-align: center;
    padding: var(--space-2) var(--space-1);
    color: var(--gray-600);
    font-size: 0.85rem;
    line-height: 1.3;
    /* background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-100);*/
}

.verb-translation .translation-main {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 2px;
    font-style: normal;
}

.verb-translation .translation-alt {
    font-size: 0.75rem;
    color: var(--gray-500);
    opacity: 0.8;
    line-height: 1.2;
    font-style: italic;
}


/* ===== DESKTOP TABLE ===== */
.desktop-view {
    display: none;
}

.table-container {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.verbs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    table-layout: fixed;
}

/* Column widths */
.verbs-table .col-translation {
    width: 25%;
}

.verbs-table .col-infinitive {
    width: 15%;
}

.verbs-table .col-past-simple {
    width: 15%;
}

.verbs-table .col-past-participle {
    width: 15%;
}

.verbs-table .col-category {
    width: 15%;
}

.verbs-table .col-signs {
    width: 15%;
}

.verbs-table thead {
    background: #33bcdd;
    color: white;
}

.verbs-table th {
    padding: var(--space-5) var(--space-4);
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    border: none;
}

.verbs-table th .material-icons {
    font-size: 16px;
    margin-right: var(--space-2);
    vertical-align: middle;
    opacity: 0.9;
}

.verbs-table tbody tr {
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition-fast);
    cursor: pointer;
}

.verbs-table tbody tr:hover {
    background: var(--primary-50);
}

.verbs-table tbody tr:last-child {
    border-bottom: none;
}

.verbs-table td {
    padding: var(--space-4);
    vertical-align: middle;
    color: var(--gray-700);
}

.verbs-table .verb-infinitive {
    font-weight: 700;
    color: var(--gray-800);
    font-size: 1rem;
}

.verbs-table .verb-form {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-weight: 600;
    font-size: 0.9rem;
}

.verbs-table .past-simple {
    color: var(--primary-600);
}

.verbs-table .past-participle {
    color: var(--primary-700);
}

.verbs-table .verb-translation {
    color: var(--gray-600);
    line-height: 1.4;
}

.translation-main {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.translation-alt {
    font-size: 0.8rem;
    color: var(--gray-500);
    opacity: 0.8;
    line-height: 1.2;
}

.verbs-table .verb-signs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

/* ===== BADGES ===== */
.category-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.category-essential {
    background: var(--success-500);
    color: white;
}

.category-intermediate {
    background: var(--warning-500);
    color: white;
}

.category-advanced {
    background: var(--error-500);
    color: white;
}

.category-common {
    background: var(--primary-500);
    color: white;
}
.category-rare {
    background: #eaeaea;
    color: white;
}

.sign-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-size: 0.65rem;
    font-weight: 500;
    background: var(--gray-200);
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-300);
}

/* ===== NO RESULTS ===== */
.no-results {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-16);
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.no-results-icon {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: var(--space-4);
}

.no-results-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.no-results-text {
    color: var(--gray-500);
    font-size: 1rem;
}

/* ===== FOOTER ===== */
.footer {
    margin-top: 48px;
    padding: 32px 16px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.05) 0%, rgba(103, 232, 249, 0.03) 50%, rgba(236, 253, 245, 0.8) 100%);
    border-top: 1px solid rgba(6, 182, 212, 0.1);
    color: var(--gray-700);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-8);
}

.footer-left {
    flex: 1;
}

.footer-right {
    flex-shrink: 0;
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-600);
    margin: 0 0 var(--space-4) 0;
    text-align: left;
}

.footer-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--gray-600);
    margin: 0;
    text-align: left;
}

.footer-contact {
    margin-bottom: var(--space-4);
}

.contact-text {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin: var(--space-6) 0 0 0;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--primary-600);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.contact-link:hover {
    color: var(--primary-700);
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(6, 182, 212, 0.1);
    padding-top: var(--space-4);
    text-align: center;
}

.footer-copyright {
    margin: 0;
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .search-section {
        flex-direction: column;
        gap: var(--space-4);
    }

    .search-options {
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .filters-grid {
        grid-template-columns: 1fr;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .footer {
        padding: 24px 16px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-6);
        text-align: center;
    }
    
    .footer-left {
        max-width: none;
    }
    
    .footer-title {
        font-size: 1.3rem;
        text-align: center;
    }
    
    .footer-description {
        font-size: 0.9rem;
        text-align: center;
    }

    .search-input {
        padding-right: var(--space-16);
    }

    .search-clear-btn {
        right: var(--space-12);
    }

    .search-results-badge {
        right: var(--space-2);
        font-size: 0.75rem;
        padding: var(--space-1) var(--space-2);
    }

    /* More compact cards on mobile */
    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .verb-card {
        padding: var(--space-3);
    }

    .verb-forms-row {
        gap: var(--space-1);
    }

    .verb-form-box {
        padding: var(--space-2);
        min-height: 36px;
    }

    .form-value {
        font-size: 0.85rem;
    }
}

/* ===== LEARNING PAGE STYLES ===== */

/* Mode Navigation */
.mode-navigation {
    display: flex;
    gap: var(--space-3);
    align-items: center;
}

.mode-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition-normal);
    border: 1px solid var(--gray-200);
}

.mode-link:hover {
    background: var(--gray-50);
    color: var(--gray-800);
    border-color: var(--gray-300);
}

.mode-link-active {
    background: var(--primary-500);
    color: white;
    border-color: var(--primary-500);
}

.mode-link-active:hover {
    background: var(--primary-600);
    border-color: var(--primary-600);
}

/* Learning Instructions */
.learn-instructions {
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.instructions-content h3 {
    color: var(--primary-700);
    margin-bottom: var(--space-4);
    font-size: 1.1rem;
}

.instructions-content ol {
    margin-bottom: var(--space-3);
    padding-left: var(--space-5);
}

.instructions-content li {
    margin-bottom: var(--space-2);
    color: var(--gray-700);
    line-height: 1.5;
}

.instructions-content p {
    color: var(--gray-600);
    font-style: italic;
    text-align: center;
    margin: 0;
}

/* Learning Cards */
.learn-card {
    position: relative;
}

.verb-form-visible .form-value {
    color: var(--primary-600);
    font-weight: 700;
}

/* Blur Effects */
.verb-form-blurred {
    position: relative;
    cursor: pointer;
    background: var(--gray-100) !important;
    border-color: var(--gray-300) !important;
}

.verb-form-blurred[data-revealed="false"] .blur-content {
    filter: blur(8px);
    user-select: none;
    pointer-events: none;
}

.verb-form-blurred[data-revealed="true"] {
    background: var(--green-50) !important;
    border-color: var(--green-300) !important;
}

.verb-form-blurred[data-revealed="true"] .blur-content {
    filter: none;
    color: var(--green-700);
    font-weight: 600;
}

.verb-translation-blurred {
    position: relative;
    cursor: pointer;
    background: var(--gray-100) !important;
    border-color: var(--gray-300) !important;
}

.verb-translation-blurred[data-revealed="false"] .blur-content {
    filter: blur(8px);
    user-select: none;
    pointer-events: none;
}

.verb-translation-blurred[data-revealed="true"] {
    background: var(--green-50) !important;
    border-color: var(--green-300) !important;
}

.verb-translation-blurred[data-revealed="true"] .blur-content {
    filter: none;
}

.verb-translation-blurred[data-revealed="true"] .blur-content .translation-main {
    color: var(--green-700);
}

/* Reveal Hints */
.reveal-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    color: var(--gray-500);
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
    pointer-events: none;
    z-index: 10;
}

.reveal-hint .material-icons {
    font-size: 20px;
    opacity: 0.7;
}

.verb-form-blurred[data-revealed="true"] .reveal-hint,
.verb-translation-blurred[data-revealed="true"] .reveal-hint {
    display: none;
}

/* Desktop Learning Table */
.learn-table {
    width: 100%;
}

.learn-table .verb-form-visible {
    color: var(--primary-600);
    font-weight: 700;
}

.learn-table .verb-form-blurred,
.learn-table .verb-translation-blurred {
    position: relative;
    cursor: pointer;
    background: var(--gray-100) !important;
}

.learn-table .verb-form-blurred[data-revealed="false"] .blur-content,
.learn-table .verb-translation-blurred[data-revealed="false"] .blur-content {
    filter: blur(6px);
    user-select: none;
    pointer-events: none;
}

.learn-table .verb-form-blurred[data-revealed="true"],
.learn-table .verb-translation-blurred[data-revealed="true"] {
    background: var(--green-50) !important;
}

.learn-table .verb-form-blurred[data-revealed="true"] .blur-content,
.learn-table .verb-translation-blurred[data-revealed="true"] .blur-content {
    filter: none;
    color: var(--green-700);
    font-weight: 600;
}

.learn-table .reveal-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--gray-500);
    pointer-events: none;
    z-index: 10;
}

.learn-table .reveal-hint .material-icons {
    font-size: 18px;
    opacity: 0.7;
}

.learn-table .verb-form-blurred[data-revealed="true"] .reveal-hint,
.learn-table .verb-translation-blurred[data-revealed="true"] .reveal-hint {
    display: none;
}

/* Success animations */
.verb-form-blurred[data-revealed="true"],
.verb-translation-blurred[data-revealed="true"] {
    animation: revealSuccess 0.3s ease-out;
}

@keyframes revealSuccess {
    0% {
        transform: scale(1);
        background: var(--gray-100);
    }
    50% {
        transform: scale(1.02);
        background: var(--green-100);
    }
    100% {
        transform: scale(1);
        background: var(--green-50);
    }
}

/* Mobile responsiveness for learning page */
@media (max-width: 768px) {
    /* Move navigation below header on mobile */
    .header-content {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-3);
    }
    
    .mode-navigation {
        gap: var(--space-2);
        margin-top: var(--space-3);
        padding-top: var(--space-3);
        border-top: 1px solid var(--gray-200);
        justify-content: center;
        order: 2;
    }
    
    .brand {
        order: 1;
    }
    
    .mode-link {
        flex: 1;
        justify-content: center;
        min-width: 120px;
        padding: var(--space-3) var(--space-4);
        font-size: 0.9rem;
    }
    
    .learn-instructions {
        padding: var(--space-4);
        margin-bottom: var(--space-4);
    }
    
    .instructions-content h3 {
        font-size: 1rem;
    }
    
    .instructions-content ol {
        padding-left: var(--space-4);
    }
    
    .instructions-content li {
        font-size: 0.9rem;
        margin-bottom: var(--space-1);
    }
}

@media (min-width: 1024px) {
    .desktop-view {
        display: block;
    }

    .mobile-view {
        display: none;
    }
    
    .container {
        max-width: 1400px;
        padding: 0 var(--space-8);
    }
}

@media (min-width: 1200px) {
    .container {
        max-width: 1600px;
    }
}

/* ===== ANIMATIONS ===== */
/* Removed animations for instant display - better UX */

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.verb-card:focus-visible,
.verb-row:focus-visible {
    outline: 3px solid var(--primary-500);
    outline-offset: 2px;
}

/* ===== UTILITIES ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== SEO CONTENT STYLES ===== */
.seo-content {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--gray-50) 100%);
    padding: var(--space-4) 0;
    margin: var(--space-8) 0 0 0;
}

.seo-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
    line-height: 1.2;
}

.seo-content .lead {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

.dictionary-features,
.learning-benefits {
    margin-top: var(--space-8);
}

.dictionary-features h2,
.learning-benefits h2 {
    font-size: 1.875rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-6);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.feature-item {
    background: white;
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-700);
    margin-bottom: var(--space-3);
}

.feature-item p {
    color: var(--gray-600);
    line-height: 1.6;
}

.seo-description {
    font-size: 1.125rem;
    color: var(--gray-700);
    line-height: 1.7;
    background: white;
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-500);
}

/* Footer SEO Enhancements */
.footer-features {
    list-style: none;
    margin: var(--space-4) 0;
}

.footer-features li {
    margin-bottom: var(--space-2);
    color: var(--gray-300);
}

.footer-seo-text {
    margin-top: var(--space-4);
    color: var(--gray-400);
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer-languages {
    margin-bottom: var(--space-6);
}

.footer-languages h4 {
    color: var(--gray-200);
    margin-bottom: var(--space-3);
    font-size: 1rem;
    font-weight: 600;
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-2);
}

.footer-lang-link {
    display: block;
    padding: var(--space-2) var(--space-3);
    background: rgba(255, 255, 255, 0.1);
    color: var(--gray-300);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.footer-lang-link:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.footer-lang-link.active {
    background: var(--primary-600);
    color: white;
}

.footer-keywords {
    margin-top: var(--space-4);
    text-align: center;
}

.footer-keywords small {
    color: var(--gray-500);
    font-size: 0.75rem;
}

/* Learning Instructions Enhancement */
.learning-tips {
    margin-top: var(--space-4);
    padding: var(--space-4);
    background: var(--primary-50);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-500);
}

.learning-tips ul {
    margin-top: var(--space-2);
    margin-left: var(--space-4);
}

.learning-tips li {
    margin-bottom: var(--space-1);
    color: var(--gray-700);
}

/* Responsive adjustments for SEO content */
@media (max-width: 768px) {
    .seo-content {
        padding: var(--space-8) 0;
    }

    .seo-content h1 {
        font-size: 2rem;
    }

    .seo-content .lead {
        font-size: 1.125rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .language-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .search-panel,
    .footer {
        display: none !important;
    }

    .verb-card,
    .verbs-table {
        box-shadow: none !important;
        border: 1px solid var(--gray-400) !important;
    }

    .mobile-view {
        display: block !important;
    }

    .desktop-view {
        display: none !important;
    }
}