/* Modern CSS Variables */
:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #dbeafe;
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 0.75rem;
    --radius-sm: 0.5rem;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 280px;
}

[data-theme="dark"] {
    --primary: #60a5fa;
    --primary-dark: #3b82f6;
    --primary-light: #1e3a8a;
    --background: #0f172a;
    --background-secondary: #1e293b;
    --surface: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border: #334155;
    --border-hover: #475569;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

.app-layout {
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    position: fixed;
    left: -100%;
    top: 0;
    height: 100vh;
    z-index: 999;
    transition: var(--transition);
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    padding: 1.5rem 0;
}

.nav-section {
    margin-bottom: 2rem;
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 0 1.5rem;
    margin-bottom: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-item:hover,
.nav-item.active {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.nav-item.active {
    border-right: 3px solid var(--primary);
    background: var(--primary-light);
    color: var(--primary-dark);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.sidebar-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Main Content */
.main-container {
    transition: var(--transition);
}

.main-container.sidebar-open {
    margin-left: var(--sidebar-width);
}

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    position: static;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
    padding: 0 1rem;
    gap: 1rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.menu-toggle:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 150px;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.dropdown-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.icon-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

/* Header Section */
.header-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.header-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-section p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Share Section */
.share-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.share-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.share-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--background);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.share-btn:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.share-btn.facebook:hover {
    background: #1877f2;
    color: white;
    border-color: #1877f2;
}

.share-btn.twitter:hover {
    background: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.share-btn.whatsapp:hover {
    background: #25d366;
    color: white;
    border-color: #25d366;
}

.share-btn.telegram:hover {
    background: #0088cc;
    color: white;
    border-color: #0088cc;
}

.share-btn.copy-link:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* FAQ Section */
.faq-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

.faq-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.faq-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
    .header-section {
        padding: 1.5rem;
    }

    .header-section h2 {
        font-size: 1.5rem;
    }

    .header-section p {
        font-size: 1rem;
    }

    .share-buttons {
        flex-direction: column;
        align-items: center;
    }

    .share-btn {
        width: 100%;
        max-width: 200px;
        justify-content: center;
    }

    .faq-section {
        padding: 1.5rem;
    }
}

/* Main Content */
.main {
    padding: 2rem 1rem;
    min-height: 100vh;
}

/* Sticky Input Section - Only Text Input */
.sticky-text-input {
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 1rem 0 0;
    margin-bottom: 2rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

/* Text Input Container */
.text-input-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.5rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #743ad5, #d53a9d);
    line-height: 0;
    animation: animatedgradient 6s ease infinite;
    background-size: 200% 200%;
}

.input-container {
    position: relative;
}

.text-input {
    width: 100%;
    min-height: 1rem;
    padding: 1rem 0 0 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: var(--background);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1.1rem;
    resize: vertical;
    transition: var(--transition);
}

.text-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.clear-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2rem;
    height: 2rem;
    border: none;
    background: var(--text-muted);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-btn:hover {
    background: var(--text-secondary);
}

.text-input:not(:placeholder-shown)+.clear-btn {
    opacity: 1;
}

/* Search and Stats Section */
.controls-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.search-container {
    position: relative;
    margin-bottom: 1.5rem;
}

.search-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--background);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-icon {
    position: absolute;
    left: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.stats-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: var(--background-secondary);
    padding: 1rem;
    border-radius: var(--radius-sm);
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Font Categories */
.font-categories {
    display: grid;
    gap: 2rem;
}

.category {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.category-header {
    background: var(--background-secondary);
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.category-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.font-grid {
    padding: 1.5rem;
    display: grid;
    gap: 1rem;
}

.font-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.font-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.font-info {
    flex: 1;
    min-width: 0;
}

.font-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.font-preview {
    font-size: 1.25rem;
    line-height: 1.4;
    color: var(--text-primary);
    word-break: break-all;
    overflow-wrap: break-word;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.copy-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.copy-btn.copied {
    background: #10b981;
}


/* Article & Footer */
.article-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

.article-section h2 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.article-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem 0;
    color: var(--text-primary);
}

.article-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-card {
    background: var(--background-secondary);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

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

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-secondary);
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--primary);
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 100;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--background);
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
    opacity: 0;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 1.125rem;
    margin: 0.5rem 0;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 80%;
        left: -100%;
    }

    .main-container.sidebar-open {
        margin-left: 0;
    }

    .controls-section {
        padding: 1rem;
    }

    .font-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .copy-btn {
        align-self: flex-end;
    }

    .stats-bar {
        flex-direction: column;
        gap: 0.5rem;
    }

    .font-grid {
        padding: 1rem;
    }

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

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }

    .header-content {
        padding: 0 0.75rem;
    }

    .dropdown-menu {
        right: 0;
        left: auto;
    }

    .scroll-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }
}

@media (min-width: 769px) {
    .sidebar-overlay {
        display: none;
    }
}

.hidden {
    display: none;
}

@keyframes animatedgradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}