/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #0ea5e9;
    --accent-color: #8b5cf6;
    --background-gradient: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e3a5f 100%);
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.12);
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --success-color: #10b981;
    --error-color: #ef4444;
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header Styles */
.header {
    text-align: center;
    padding: 3rem 1.5rem 2rem;
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.15) 0%, transparent 100%);
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

/* Search Section */
.search-section {
    position: relative;
    margin-bottom: 3rem;
}

.search-container {
    display: flex;
    gap: 0.75rem;
    max-width: 700px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.search-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

/* Suggestions Dropdown */
.suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 700px;
    background: rgba(30, 27, 75, 0.95);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    margin-top: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

.suggestions-dropdown.hidden {
    display: none;
}

.suggestion-item {
    padding: 0.875rem 1.25rem;
    cursor: pointer;
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition);
}

.suggestion-item:last-child {
    border-bottom: none;
}

.suggestion-item:hover {
    background: rgba(99, 102, 241, 0.2);
}

.suggestion-symbol {
    font-weight: 600;
    color: var(--primary-light);
}

.suggestion-category {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

/* Section Titles */
.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Results Section */
.results-section {
    margin-bottom: 3rem;
}

.results-section.hidden {
    display: none;
}

.results-container {
    display: grid;
    gap: 1rem;
}

.result-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.result-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.result-symbol {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-light);
}

.result-category {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: rgba(139, 92, 246, 0.2);
    color: var(--accent-color);
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-preview {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    backdrop-filter: blur(5px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

#modalBody {
    padding: 2rem;
}

.modal-symbol {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}

.modal-category {
    display: inline-block;
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
    background: rgba(139, 92, 246, 0.2);
    color: var(--accent-color);
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1.5rem;
}

.modal-section {
    margin-bottom: 1.5rem;
}

.modal-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.modal-section p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.modal-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.keyword-tag {
    font-size: 0.85rem;
    padding: 0.375rem 0.75rem;
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    border-radius: 20px;
}

.related-symbols {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.related-symbol {
    font-size: 0.85rem;
    padding: 0.375rem 0.75rem;
    background: rgba(14, 165, 233, 0.15);
    color: var(--secondary-color);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.related-symbol:hover {
    background: rgba(14, 165, 233, 0.3);
}

/* Popular Symbols */
.popular-section {
    margin-bottom: 3rem;
}

.popular-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.popular-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.popular-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.popular-emoji {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.popular-name {
    font-weight: 600;
    color: var(--text-primary);
}

/* Categories Section */
.categories-section {
    margin-bottom: 3rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.category-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.category-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.category-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.category-count {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Contributions Section */
.contributions-section {
    margin-bottom: 3rem;
}

.contribution-form {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 2rem;
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-primary);
    transition: var(--transition);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-select {
    cursor: pointer;
}

.form-select option {
    background: #1e1b4b;
    color: var(--text-primary);
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contribution-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.contribution-message.hidden {
    display: none;
}

.contribution-message.success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.contribution-message.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* User Contributions Display */
.user-contributions-section.hidden {
    display: none;
}

.user-contributions-container {
    display: grid;
    gap: 1rem;
}

.user-contribution-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}

.user-contribution-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.user-contribution-symbol {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-light);
}

.user-contribution-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
    border-radius: 10px;
    text-transform: uppercase;
}

.user-contribution-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid var(--card-border);
    padding: 2rem 1.5rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.footer-powered {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-powered a {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer-powered a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.75rem;
    }

    .logo {
        width: 36px;
        height: 36px;
    }

    .tagline {
        font-size: 0.95rem;
    }

    .search-container {
        flex-direction: column;
    }

    .search-btn {
        justify-content: center;
    }

    .suggestions-dropdown {
        left: 0;
        transform: none;
        width: 100%;
    }

    .popular-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .section-title {
        font-size: 1.25rem;
    }

    .contribution-form {
        padding: 1.5rem;
    }

    .modal-content {
        margin: 0.5rem;
        max-height: 90vh;
    }

    #modalBody {
        padding: 1.5rem;
    }

    .modal-symbol {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 2rem 1rem 1.5rem;
    }

    .main-content {
        padding: 0 1rem 2rem;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .logo-container {
        flex-direction: column;
        gap: 0.5rem;
    }

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

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

    .result-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer {
        padding: 1.5rem 1rem;
    }
}

/* Animation for cards */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-card,
.popular-card,
.category-card,
.user-contribution-card {
    animation: fadeIn 0.3s ease forwards;
}

/* Loading state */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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