/* ============================================
   LIGHTFLOW - IMPROVED RESPONSIVE CSS
   Smooth transitions, better mobile support
   ============================================ */

:root {
    --brand-blue: #3B4FA0;
    --dark-blue: #1E2856;
    --light-blue: #4A90E2;
    --energy-orange: #FF6B35;
    --success-green: #2ECC71;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --background: #F8F9FA;
    --white: #FFFFFF;
    --border: #E8ECEF;
    
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition: all 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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    line-height: 1.7;
    color: var(--text-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem clamp(1rem, 3vw, 2rem);
}

.logo {
    height: clamp(40px, 5vw, 50px);
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2vw, 2rem);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--brand-blue);
}

.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: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: clamp(0.75rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2rem);
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.button-primary {
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--light-blue) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.button-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.button-secondary {
    background: transparent;
    color: var(--brand-blue);
    border: 2px solid var(--brand-blue);
}

.button-secondary:hover {
    background: var(--brand-blue);
    color: var(--white);
}

.button-large {
    padding: clamp(1rem, 2.5vw, 1.25rem) clamp(2rem, 4vw, 3rem);
    font-size: clamp(1rem, 2vw, 1.2rem);
}

.cta-button {
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--light-blue) 100%);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
}

/* Hero Section */
.hero {
    padding: clamp(100px, 15vh, 150px) 0 clamp(3rem, 8vh, 6rem) 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 50%, #f0f4f8 100%);
    text-align: center;
}

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

.hero-title {
    margin-bottom: clamp(1rem, 3vh, 1.5rem);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: clamp(1.5rem, 4vh, 2.5rem);
    color: var(--text-light);
}

.hero-cta {
    margin-bottom: clamp(2rem, 5vh, 3rem);
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(1rem, 3vw, 2rem);
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    color: var(--text-light);
}

/* Section Titles */
.section-title {
    text-align: center;
    margin-bottom: clamp(1rem, 3vh, 2rem);
}

.section-subtitle {
    text-align: center;
    max-width: 700px;
    margin: 0 auto clamp(2rem, 5vh, 3rem) auto;
    color: var(--text-light);
}

/* Problem Section */
.problem-section {
    padding: clamp(3rem, 10vh, 6rem) 0;
    background: var(--white);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
}

.problem-card {
    background: var(--white);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    transition: var(--transition);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--energy-orange);
}

.problem-icon {
    font-size: clamp(2.5rem, 5vw, 3rem);
    margin-bottom: 1rem;
}

.problem-card h3 {
    margin-bottom: 0.75rem;
}

.problem-card p {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    margin-bottom: 1rem;
}

.problem-impact {
    color: var(--energy-orange);
    font-weight: 600;
    font-size: clamp(1rem, 2vw, 1.1rem);
}

/* Solution Section */
.solution-section {
    padding: clamp(3rem, 10vh, 6rem) 0;
    background: var(--background);
}

.solution-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: clamp(3rem, 6vh, 4rem);
}

.solution-step {
    background: var(--white);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    transition: var(--transition);
}

.solution-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-blue);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(50px, 8vw, 60px);
    height: clamp(50px, 8vw, 60px);
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--light-blue) 100%);
    color: var(--white);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 1rem;
}

.solution-step h3 {
    margin-bottom: 0.75rem;
}

.solution-step p {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
}

/* Comparison */
.comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
}

.comparison-col {
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
}

.comparison-col.before {
    background: linear-gradient(135deg, #FFF5F5 0%, #FFFFFF 100%);
    border-color: var(--energy-orange);
}

.comparison-col.after {
    background: linear-gradient(135deg, #F0FFF4 0%, #FFFFFF 100%);
    border-color: var(--success-green);
}

.comparison-col h4 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    margin-bottom: 1.5rem;
}

.comparison-col ul {
    list-style: none;
    padding: 0;
}

.comparison-col ul li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: clamp(0.95rem, 2vw, 1.05rem);
}

.comparison-col.before ul li::before {
    content: '❌';
    position: absolute;
    left: 0;
}

.comparison-col.after ul li::before {
    content: '✅';
    position: absolute;
    left: 0;
}

/* Services Section */
.services {
    padding: clamp(3rem, 10vh, 6rem) 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
}

.service-card {
    background: var(--white);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    transition: var(--transition);
    position: relative;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-blue);
}

.service-card.featured {
    background: linear-gradient(135deg, #F8F9FF 0%, #FFFFFF 100%);
    border-color: var(--brand-blue);
}

.badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, var(--energy-orange) 0%, #ff8c5a 100%);
    color: var(--white);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
    font-weight: 700;
    text-transform: uppercase;
}

.service-icon {
    font-size: clamp(2.5rem, 5vw, 3rem);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    margin-bottom: 0.75rem;
}

.service-desc {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.service-benefits {
    margin-bottom: 1.5rem;
}

.benefit {
    padding: 0.5rem 0;
    font-size: clamp(0.9rem, 1.8vw, 0.95rem);
    color: var(--text-light);
}

.service-result {
    background: rgba(46, 204, 113, 0.1);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--success-green);
    color: var(--text-dark);
    font-weight: 600;
    font-size: clamp(0.95rem, 2vw, 1.05rem);
}

/* Pricing Section */
.pricing {
    padding: clamp(3rem, 10vh, 6rem) 0;
    background: var(--background);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
    gap: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: clamp(2rem, 4vh, 3rem);
}

.pricing-card {
    background: var(--white);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    background: linear-gradient(135deg, #F8F9FF 0%, #FFFFFF 100%);
    border-color: var(--brand-blue);
    transform: scale(1.03);
}

.pricing-card.featured:hover {
    transform: scale(1.03) translateY(-6px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--energy-orange) 0%, #ff8c5a 100%);
    color: var(--white);
    padding: 0.4rem 1.5rem;
    border-radius: 50px;
    font-size: clamp(0.75rem, 1.5vw, 0.85rem);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.pricing-card h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.6rem);
    margin-bottom: 1rem;
}

.price {
    display: flex;
    align-items: baseline;
    margin-bottom: 1rem;
}

.currency {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--brand-blue);
}

.amount {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--brand-blue);
    line-height: 1;
}

.period {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-light);
    margin-left: 0.3rem;
}

.pricing-desc {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.pricing-features li {
    padding: 0.6rem 0;
    font-size: clamp(0.9rem, 1.8vw, 1rem);
    color: var(--text-dark);
}

.pricing-note {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: clamp(1.5rem, 3vw, 2rem);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
}

/* FAQ Section */
.faq {
    padding: clamp(3rem, 10vh, 6rem) 0;
    background: var(--white);
}

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

.faq-item {
    background: var(--white);
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--brand-blue);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: clamp(1rem, 2.5vw, 1.5rem);
    cursor: pointer;
    transition: var(--transition);
}

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

.faq-question h3 {
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin: 0;
    flex: 1;
    padding-right: 1rem;
}

.faq-icon {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--brand-blue);
    font-weight: 700;
    transition: var(--transition);
    flex-shrink: 0;
}

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

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

.faq-item.active .faq-answer {
    max-height: 1000px;
    padding: 0 clamp(1rem, 2.5vw, 1.5rem) clamp(1rem, 2.5vw, 1.5rem) clamp(1rem, 2.5vw, 1.5rem);
}

.faq-answer p {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    line-height: 1.7;
}

/* Contact Section */
.contact {
    padding: clamp(4rem, 12vh, 8rem) 0;
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--light-blue) 100%);
    text-align: center;
    color: var(--white);
}

.contact-content h2 {
    color: var(--white);
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
}

.contact-content p {
    color: rgba(255,255,255,0.95);
    font-size: clamp(1.1rem, 2.5vw, 1.3rem);
    margin-bottom: 2rem;
}

.contact-content .button-primary {
    background: var(--white);
    color: var(--brand-blue);
    margin-bottom: 2rem;
}

.contact-content .button-primary:hover {
    background: var(--energy-orange);
    color: var(--white);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
}

.contact-info p {
    font-size: clamp(1rem, 2vw, 1.1rem);
    color: rgba(255,255,255,0.95);
}

.contact-info a {
    color: var(--white);
    font-weight: 600;
    text-decoration: none;
}

/* Footer */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: clamp(3rem, 8vh, 4rem) 0 clamp(1.5rem, 4vh, 2rem) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
    gap: clamp(2rem, 4vw, 3rem);
    margin-bottom: clamp(2rem, 4vh, 3rem);
}

.footer-logo {
    height: clamp(35px, 5vw, 45px);
    width: auto;
    margin-bottom: 1rem;
}

.footer-col p {
    color: rgba(255,255,255,0.7);
    font-size: clamp(0.9rem, 1.8vw, 1rem);
    margin: 0.5rem 0;
}

.cac-badge {
    font-size: clamp(0.85rem, 1.6vw, 0.9rem);
    font-weight: 600;
    color: rgba(255,255,255,0.9);
}

.footer-col h4 {
    color: var(--white);
    font-size: clamp(1rem, 2vw, 1.1rem);
    margin-bottom: 1rem;
}

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

.footer-col ul li {
    margin-bottom: 0.6rem;
}

.footer-col ul li a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: clamp(0.9rem, 1.8vw, 1rem);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    font-size: clamp(0.85rem, 1.6vw, 0.9rem);
}

/* Mobile Menu */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
        z-index: 999;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links a {
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border);
        font-size: 1.1rem;
    }
    
    .cta-button {
        width: 100%;
        text-align: center;
        margin-top: 1rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

/* Smooth Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Loading State */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

body {
    animation: fadeIn 0.3s ease;
}

/* Service Category Sections */
.service-category {
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 2px solid var(--border);
}

.service-category:last-child {
    border-bottom: none;
}

.category-title {
    font-size: 2rem;
    color: var(--brand-blue);
    margin-bottom: 0.5rem;
    text-align: center;
}

.category-desc {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .category-title {
        font-size: 1.5rem;
    }
    
    .category-desc {
        font-size: 1rem;
    }
    
    .service-category {
        margin-bottom: 3rem;
        padding-bottom: 2rem;
    }
}