/* ============================================
   QUANTUM TECH - Premium Dark Landing Page
   ============================================ */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --text-primary: #f0f0f5;
    --text-secondary: #9595a8;
    --text-muted: #6b6b80;
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --gradient-1: linear-gradient(135deg, #6c5ce7, #a29bfe);
    --gradient-2: linear-gradient(135deg, #00b894, #55efc4);
    --gradient-3: linear-gradient(135deg, #fd79a8, #fdcb6e);
    --gradient-hero: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #74b9ff 100%);
    --border: rgba(255, 255, 255, 0.06);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Particles Canvas */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(10, 10, 15, 0.8);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text .accent {
    color: var(--accent-light);
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    color: var(--text-primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-outline {
    background: transparent;
    color: var(--accent-light);
    border: 1px solid var(--accent);
    padding: 14px 28px;
    width: 100%;
    justify-content: center;
}

.btn-outline:hover {
    background: var(--accent);
    color: white;
}

.btn-nav {
    background: var(--gradient-1);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius-xs);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
    border-radius: var(--radius-sm);
}

.btn-whatsapp {
    background: #25d366;
    color: white;
    font-size: 1.1rem;
    padding: 18px 36px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.4);
    background: #20c15e;
}

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-light);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 36px;
    line-height: 1.7;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-plus, .stat-unit {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-light);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* ============================================
   SECTIONS COMMON
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.15);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 520px;
    margin: 0 auto;
}

/* ============================================
   SERVICES
   ============================================ */
.services {
    padding: 100px 0;
    background: var(--bg-secondary);
}

/* Category Filter Tabs */
.category-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: rgba(108, 92, 231, 0.3);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.filter-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.services-grid-expanded {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

/* Filtered-out cards */
.service-card.hidden {
    display: none;
}

/* "More" area */
.services-more {
    text-align: center;
    margin-top: 48px;
    color: var(--text-muted);
    font-size: 1rem;
}

.services-more a {
    color: var(--accent-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.services-more a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(108, 92, 231, 0.2);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card.featured {
    border-color: rgba(108, 92, 231, 0.3);
    background: linear-gradient(180deg, rgba(108, 92, 231, 0.08) 0%, var(--bg-card) 100%);
}

.service-card.featured::before {
    opacity: 1;
}

.featured-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: var(--gradient-1);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    margin-bottom: 24px;
}

.service-features li {
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.service-price {
    display: block;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.service-price strong {
    font-size: 1.3rem;
    color: var(--accent-light);
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.how-it-works {
    padding: 100px 0;
}

.steps-grid {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 220px;
    max-width: 300px;
    text-align: center;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.step:hover {
    transform: translateY(-4px);
    border-color: rgba(108, 92, 231, 0.2);
}

.step-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 16px;
}

.step h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

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

.step-arrow {
    font-size: 1.5rem;
    color: var(--text-muted);
    padding-top: 50px;
}

/* ============================================
   PORTFOLIO
   ============================================ */
.portfolio {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.portfolio-grid-expanded {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.portfolio-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.portfolio-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.portfolio-preview {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portfolio-preview.gradient-1 { background: var(--gradient-1); }
.portfolio-preview.gradient-2 { background: var(--gradient-2); }
.portfolio-preview.gradient-3 { background: var(--gradient-3); }

.portfolio-emoji {
    font-size: 4rem;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
}

.portfolio-card h3 {
    padding: 20px 24px 8px;
    font-size: 1.1rem;
}

.portfolio-card p {
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.portfolio-tags {
    display: flex;
    gap: 8px;
    padding: 16px 24px 24px;
    flex-wrap: wrap;
}

.portfolio-tags span {
    padding: 4px 12px;
    background: rgba(108, 92, 231, 0.1);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--accent-light);
    font-weight: 500;
}

/* ============================================
   PRICING
   ============================================ */
.pricing {
    padding: 100px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.pricing-card.popular {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(108, 92, 231, 0.1) 0%, var(--bg-card) 100%);
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-4px);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--gradient-1);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
    white-space: nowrap;
}

.pricing-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.price {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.price span {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
}

.price-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 28px;
    text-align: left;
}

.pricing-card li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.pricing-card li:last-child {
    border-bottom: none;
}

/* ============================================
   TESTIMONIALS
   ============================================ */
.testimonials {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

.testimonial-card:hover {
    border-color: rgba(108, 92, 231, 0.2);
}

.testimonial-stars {
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.testimonial-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: white;
}

.testimonial-author strong {
    display: block;
    font-size: 0.9rem;
}

.testimonial-author span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    padding: 100px 0;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37, 211, 102, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-content > p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.footer-content {
    text-align: center;
    margin-bottom: 20px;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
}

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

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   FLOATING WHATSAPP
   ============================================ */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 99;
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 4px 30px rgba(37, 211, 102, 0.6); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero {
        padding: 130px 0 70px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .steps-grid {
        flex-direction: column;
        align-items: center;
    }

    .step-arrow {
        transform: rotate(90deg);
        padding: 0;
    }

    .step {
        max-width: 100%;
    }

    .pricing-card.popular {
        transform: scale(1);
    }

    .pricing-card.popular:hover {
        transform: translateY(-4px);
    }

    .services-grid,
    .portfolio-grid,
    .testimonials-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

/* Scroll animations */
.service-card,
.step,
.portfolio-card,
.pricing-card,
.testimonial-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.service-card.visible,
.step.visible,
.portfolio-card.visible,
.pricing-card.visible,
.testimonial-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   FLOATING BACKGROUND ICONS
   ============================================ */
.floating-icons {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.float-icon {
    position: absolute;
    font-size: 2rem;
    opacity: 0.06;
    animation: floatDrift 8s ease-in-out infinite;
    user-select: none;
}

@keyframes floatDrift {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-18px) rotate(5deg); }
    50% { transform: translateY(-30px) rotate(-3deg); }
    75% { transform: translateY(-12px) rotate(2deg); }
}

/* ============================================
   SERVICE DETAIL MODAL
   ============================================ */
.service-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    padding: 24px;
}

.service-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.service-modal {
    background: var(--bg-card);
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: var(--radius);
    padding: 48px;
    max-width: 560px;
    width: 100%;
    position: relative;
    transform: translateY(30px) scale(0.95);
    transition: transform 0.3s ease;
    max-height: 85vh;
    overflow-y: auto;
}

.service-modal-overlay.active .service-modal {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}

.modal-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.modal-description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.modal-features {
    margin-bottom: 24px;
}

.modal-features h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-light);
    margin-bottom: 12px;
}

.modal-features ul {
    list-style: none;
    padding: 0;
}

.modal-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.92rem;
    border-bottom: 1px solid var(--border);
}

.modal-features li:last-child {
    border-bottom: none;
}

.modal-price {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.modal-price strong {
    font-size: 1.5rem;
    color: var(--accent-light);
}

.modal-cta {
    width: 100%;
    justify-content: center;
    text-align: center;
}

@media (max-width: 768px) {
    .service-modal {
        padding: 32px 24px;
    }

    .float-icon {
        font-size: 1.4rem;
    }
}