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

:root {
    --primary-color: #8B5CF6;
    --primary-dark: #7C3AED;
    --accent-pink: #EC4899;
    --accent-blue: #3B82F6;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --text-primary: #FFFFFF;
    --text-secondary: #A78BFA;
    --background: #1A1A2E;
    --surface: #16213E;
    --surface-light: #1F2937;
    --border: #2D3748;
    --shadow-sm: 0 1px 2px 0 rgba(139, 92, 246, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(139, 92, 246, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(139, 92, 246, 0.3);
    --glow: 0 0 20px rgba(139, 92, 246, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #0A0A1F;
    background-image: 
        linear-gradient(rgba(139, 92, 246, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.05) 1px, transparent 1px),
        radial-gradient(ellipse at top, rgba(139, 92, 246, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom, rgba(236, 72, 153, 0.1), transparent 50%);
    background-size: 50px 50px, 50px 50px, 100% 100%, 100% 100%;
    background-position: 0 0, 0 0, center top, center bottom;
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


.navbar {
    background: rgba(22, 33, 62, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    border-radius: 2px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}


.hero {
    padding: 100px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    color: white;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.8);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: rgba(139, 92, 246, 0.1);
}

.btn-large {
    padding: 16px 48px;
    font-size: 18px;
}
.hero-image {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: rgba(22, 33, 62, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--glow);
    animation: float 3s ease-in-out infinite;
}

.card-1 { top: 20%; left: 10%; animation-delay: 0s; }
.card-2 { top: 50%; right: 10%; animation-delay: 1s; }
.card-3 { bottom: 20%; left: 30%; animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.card-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.card-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}


.features {
    padding: 80px 0;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(22, 33, 62, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.4);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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


.cta {
    padding: 80px 20px;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(22, 33, 62, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    padding: 60px 40px;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.cta p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.footer {
    background: rgba(22, 33, 62, 0.8);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
    padding: 60px 0 20px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 16px;
}

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

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
}


.page-hero {
    padding: 80px 0 40px;
    text-align: center;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
}


.content-section {
    padding: 60px 0;
}

.content-section.alt-bg {
    background: rgba(22, 33, 62, 0.3);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.content-text h2 {
    font-size: 32px;
    margin-bottom: 24px;
}

.content-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}


.stats-box {
    background: rgba(22, 33, 62, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 12px;
    padding: 40px;
}

.stat {
    text-align: center;
    margin-bottom: 32px;
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 16px;
}


.features-list {
    max-width: 900px;
    margin: 0 auto;
}

.feature-item {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
    padding: 32px;
    background: rgba(22, 33, 62, 0.4);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 12px;
    transition: all 0.3s;
}

.feature-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.feature-number {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    min-width: 50px;
}

.feature-content h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

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


.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.tech-card {
    background: rgba(22, 33, 62, 0.4);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s;
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.tech-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.tech-card p {
    color: var(--text-secondary);
    font-size: 14px;
}


.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 16px;
    background: rgba(22, 33, 62, 0.4);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
}

.faq-question:hover {
    background: rgba(139, 92, 246, 0.1);
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
}

.faq-toggle {
    font-size: 24px;
    color: var(--primary-color);
    transition: transform 0.3s;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 20px 20px;
    color: var(--text-secondary);
    line-height: 1.6;
}


.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.guide-step {
    display: flex;
    gap: 20px;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

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


.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
}

.contact-form-wrapper h2,
.contact-info h2 {
    font-size: 28px;
    margin-bottom: 24px;
}

/* Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    background: var(--surface-light);
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.form-group textarea {
    resize: vertical;
}

.form-message {
    padding: 16px;
    border-radius: 8px;
    margin-top: 20px;
}

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


.info-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.info-card {
    background: rgba(22, 33, 62, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
}

.info-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.info-card h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.info-card p {
    color: var(--text-secondary);
}


.social-links h3 {
    font-size: 18px;
    margin-bottom: 16px;
}

.social-icons {
    display: flex;
    gap: 16px;
}

.social-icon {
    width: 48px;
    height: 48px;
    background: rgba(22, 33, 62, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.social-icon:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}


.faq-shortcut {
    text-align: center;
    padding: 40px;
}

.faq-shortcut h2 {
    font-size: 32px;
    margin-bottom: 16px;
}

.faq-shortcut p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.app-wrapper {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    padding: 40px 20px;
}

.app-container {
    max-width: 600px;
    background: rgba(22, 33, 62, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    box-shadow: var(--shadow-lg), var(--glow);
    padding: 32px;
    animation: slideIn 0.3s ease-out;
}

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

.app-container header {
    text-align: center;
    margin-bottom: 32px;
}

.app-container header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}


.input-section {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

#taskInput {
    flex: 1;
    padding: 12px 16px;
    background: var(--surface-light);
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-primary);
    transition: all 0.2s;
    outline: none;
}

#taskInput::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

#taskInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2), var(--glow);
}

.btn-add {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.5);
}

.btn-add:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--accent-pink));
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.8), var(--shadow-md);
}

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


.stats {
    display: flex;
    justify-content: space-around;
    padding: 16px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 8px;
    margin-bottom: 20px;
}

.stat-item {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.stat-item strong {
    display: block;
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


.filter-section {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.filter-btn {
    flex: 1;
    padding: 8px 16px;
    background: var(--surface-light);
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    border-color: transparent;
    color: white;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.5);
}


.task-list {
    list-style: none;
    margin-bottom: 20px;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(31, 41, 55, 0.5);
    border: 2px solid var(--border);
    border-radius: 8px;
    margin-bottom: 12px;
    transition: all 0.2s;
    animation: taskAppear 0.3s ease-out;
}

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

.task-item:hover {
    border-color: var(--primary-color);
    background: rgba(139, 92, 246, 0.1);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.3);
}

.task-item.completed {
    opacity: 0.5;
}

.task-item.completed .task-text {
    text-decoration: line-through;
    color: var(--text-secondary);
}


.task-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
    position: relative;
}

.task-checkbox:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.task-item.completed .task-checkbox {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-pink));
    border-color: transparent;
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.6);
}

.task-item.completed .task-checkbox::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}


.task-text {
    flex: 1;
    font-size: 15px;
    color: var(--text-primary);
    word-break: break-word;
}


.btn-delete {
    padding: 6px 12px;
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.btn-delete:hover {
    background: var(--danger-color);
    color: white;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.5);
}


.empty-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.empty-state.show {
    display: flex;
}

.empty-state svg {
    color: var(--primary-color);
    opacity: 0.4;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.5));
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 20px;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 14px;
}


@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 60px 20px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-image {
        display: none;
    }

    .content-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

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

    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }
}

@media (max-width: 640px) {
    .app-container {
        padding: 24px;
    }

    .app-container header h1 {
        font-size: 24px;
    }

    .input-section {
        flex-direction: column;
    }

    .stats {
        flex-direction: column;
        gap: 12px;
    }

    .stat-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .stat-item strong {
        display: inline;
        font-size: 20px;
        margin: 0;
    }

    .page-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 28px;
    }
}