:root {
    --primary: #6366F1;
    --primary-dark: #4F46E5;
    --secondary: #EC4899;
    --accent: #8B5CF6;
    --dark: #1F2937;
    --light: #F9FAFB;
    --gray: #9CA3AF;
    --danger: #EF4444;
    --success: #10B981;
    --warning: #F59E0B;
}

/* Ad Styles */
.mobile-ad {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 0.5rem;
    background: #f8f9fa;
    z-index: 95;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.desktop-ad {
    text-align: center;
    padding: 1rem;
    background: #f8f9fa;
    margin: 1rem auto;
    max-width: 728px;
}

.native-ad {
    max-width: 1200px;
    margin: 2rem auto;
    text-align: center;
    padding: 1rem;
}

.tool-banner {
    margin: 1rem;
    text-align: center;
}

@media (max-width: 768px) {
    .mobile-ad {
        display: block;
    }
    .desktop-ad {
        display: none;
    }
    body {
        padding-bottom: 70px; /* Space for fixed mobile ad */
    }
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--dark);
    background-color: #F3F4F6;
    line-height: 1.6;
}

h1, h2, h3, h4, h5 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.btn {
    display: inline-block;
    background: linear-gradient(to right, var(--primary), var(--accent));
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: linear-gradient(to right, var(--secondary), var(--accent));
}

.btn-secondary:hover {
    background: linear-gradient(to right, #DB2777, var(--accent));
}

/* Header */
header {
    background: linear-gradient(to right, var(--primary), var(--accent));
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: white;
}

.logo i {
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: white;
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(99, 102, 241, 0.9), rgba(139, 92, 246, 0.9));
    color: white;
    padding: 8rem 0 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="90">#️⃣</text></svg>') center/50px repeat;
    opacity: 0.1;
    animation: moveBackground 20s linear infinite;
}

@keyframes moveBackground {
    0% { background-position: 0 0; }
    100% { background-position: 100px 100px; }
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.hero .btn {
    position: relative;
    z-index: 2;
}

/* Main Tool Section */
.tool-section {
    padding: 5rem 0;
    background-color: white;
}

.tool-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2.5rem;
    background-color: white;
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.tool-container:hover {
    transform: translateY(-5px);
}

.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-header h2 {
    color: var(--primary);
    font-size: 2rem;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.textarea-wrapper {
    position: relative;
}

textarea {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    border: 2px solid #E5E7EB;
    border-radius: 0.5rem;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

.clear-btn {
    position: absolute;
    right: 1rem;
    top: 1rem;
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.3s ease;
}

.clear-btn:hover {
    color: var(--danger);
    transform: rotate(90deg);
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.results-container {
    margin-top: 2rem;
    display: none;
    animation: slideUp 0.5s ease;
}

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

.results-tabs {
    display: flex;
    margin-bottom: 1rem;
    border-bottom: 2px solid #E5E7EB;
}

.tab {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab:hover:not(.active) {
    color: var(--accent);
}

.tab-content {
    display: none;
    padding: 1.5rem;
    background-color: #F9FAFB;
    border-radius: 0.5rem;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.result-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 1rem;
}

.stat {
    flex: 1;
    text-align: center;
    padding: 1.5rem;
    background-color: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.stat h4 {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat .number {
    font-size: 2rem;
    font-weight: 700;
}

.total-hashtags .number {
    color: var(--primary);
}

.banned-hashtags .number {
    color: var(--danger);
}

.safe-hashtags .number {
    color: var(--success);
}

.hashtag-item {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border-radius: 2rem;
    margin: 0.35rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.hashtag-item:hover {
    transform: translateY(-2px);
}

.banned-hashtag {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.safe-hashtag {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Footer */
footer {
    background-color: var(--dark);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    flex: 1;
    min-width: 250px;
}

.footer-logo h3 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-links {
    flex: 1;
    min-width: 200px;
}

.footer-links h4 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.5rem;
    width: 30px;
    height: 2px;
    background-color: var(--secondary);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    color: white;
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary);
    transform: translateY(-3px) rotate(8deg);
}

.copyright {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray);
    font-size: 0.9rem;
}

/* Loading Animation */
.loader {
    display: none;
    text-align: center;
    padding: 2rem 0;
}

.loader span {
    display: inline-block;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: linear-gradient(to right, var(--primary), var(--accent));
    margin: 0 5px;
    animation: bounce 1.5s infinite ease-in-out;
}

.loader span:nth-child(2) {
    animation-delay: 0.2s;
    background: linear-gradient(to right, var(--secondary), var(--accent));
}

.loader span:nth-child(3) {
    animation-delay: 0.4s;
    background: linear-gradient(to right, var(--accent), var(--primary));
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(to bottom right, var(--primary), var(--accent));
    z-index: 200;
    padding: 2rem;
    transform: translateX(-100%);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
    transform: translateX(0);
}

.close-menu {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-menu:hover {
    transform: rotate(90deg);
}

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 4rem;
    text-align: center;
}

.mobile-menu-links a {
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem;
}

.mobile-menu-links a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    transform: translateX(10px);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: linear-gradient(to right, var(--primary), var(--accent));
    color: white;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background-color: var(--light);
    position: relative;
    overflow: hidden;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(45deg, rgba(99, 102, 241, 0.03) 0%, rgba(139, 92, 246, 0.03) 100%);
    z-index: 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    z-index: 1;
}

.section-header h2 {
    font-size: 2.5rem;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: inline-block;
    margin-bottom: 1rem;
}

.section-header h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -0.75rem;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    border-radius: 3px;
}

.section-header p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 50%;
    margin-bottom: 1.5rem;
    color: var(--primary);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.2));
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

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

/* How to Use Section */
.how-to-use {
    padding: 5rem 0;
    background-color: white;
}

.steps {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.2);
}

.step-content {
    flex: 1;
}

.step-content h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.step-content p {
    color: var(--gray);
    font-size: 1rem;
    line-height: 1.6;
}

/* FAQ Section */
.faq {
    padding: 5rem 0;
    background-color: var(--light);
    position: relative;
    overflow: hidden;
}

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

.faq-item {
    background: white;
    border-radius: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.faq-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.5rem;
    background: none;
    border: none;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question .icon {
    transition: transform 0.3s ease;
    color: var(--primary);
}

.faq-item.active .faq-question {
    color: var(--primary);
}

.faq-item.active .icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--gray);
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 992px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .tool-container {
        padding: 1.5rem;
    }

    .result-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .button-group {
        flex-direction: column;
    }

    .stat {
        padding: 1rem;
    }

    .stat .number {
        font-size: 1.5rem;
    }
    
    .feature-card {
        padding: 2rem;
    }
    
    .step {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
        padding: 1.5rem;
    }
    
    .step:hover {
        transform: translateX(0) translateY(-5px);
    }
    
    .faq-question {
        padding: 1.25rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 576px) {
    .tool-header h2 {
        font-size: 1.5rem;
    }

    .results-tabs {
        flex-direction: column;
        border-bottom: none;
    }

    .tab {
        margin-bottom: 0.5rem;
        border: 1px solid #E5E7EB;
        border-radius: 0.5rem;
    }

    .tab.active {
        border-color: var(--primary);
        background-color: rgba(99, 102, 241, 0.1);
    }

    .hashtag-item {
        width: 100%;
        text-align: center;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .step {
        padding: 1.25rem;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}