/* ===== CSS Variables ===== */
:root {
    --primary-color: #2C3E50;
    --primary-light: #d2e3fc;
    --primary-dark: #1565c0;
    --accent-color: #34a853;
    --accent-light: #d4f0dc;
    --secondary-color: #ea4335;
    --text-primary: #2C3E50;
    --text-secondary: #5f6368;
    --text-light: #80868b;
    --bg-primary: #ffffff;
    --bg-secondary: white;
    --bg-tertiary: #f1f3f4;
    --border-color: #dadce0;
    --border-light: #ececec;
    
    --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    --shadow-md: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
    --shadow-lg: 0 4px 8px 3px rgba(60, 64, 67, 0.15);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Global Reset ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
     'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(26, 115, 232, 0.03) 0%, transparent 50%),
                radial-gradient(circle at bottom left, rgba(52, 168, 83, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ===== Header Styles ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.logo img {
    height: 80px;
    width: auto;
    transition: var(--transition);
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 18px;
    position: relative;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-link.active {
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-cta {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.5rem;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.language-switch {
    display: flex;
    gap: 0.25rem;
    margin-left: 1.5rem;
}

.lang-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn:hover {
    background: var(--bg-tertiary);
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

main {
    padding-top: 80px;
    min-height: 100vh;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--primary-light) 100%);
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(26, 115, 232, 0.08) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 20px;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

/* ===== Tabs Section ===== */
.tabs-container {
    background: #fff;
    padding: 50px 0px 10px 0px;
    position: sticky;
    top: 80px;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-light);
}

.tabs {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 0 20px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.tabs::-webkit-scrollbar {
    height: 6px;
}

.tabs::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.tabs::-webkit-scrollbar-track {
    background: transparent;
}

.tab {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: none;
    padding: 12px 24px;
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 15px;
}

.tab:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.tab-content {
    display: none;
}

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

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

/* ===== Container & Sections ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    background: #fff;
    border-radius: var(--border-radius-lg);
    padding: 60px;
    margin: 40px 0;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 2.5em);
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: clamp(1rem, 2vw, 1.15em);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== Pricing Grid ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.pricing-card {
    background: #fff;
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.pricing-card:hover::before {
    transform: scaleX(1);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.pricing-card.featured {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--accent-color), #059669);
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75em;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.pricing-card h4 {
    font-size: 1.5em;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 800;
}

.pricing-card.featured h4,
.pricing-card.featured .subtitle,
.pricing-card.featured .price,
.pricing-card.featured li {
    color: white;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.price {
    font-size: clamp(2.2rem, 4vw, 2.8em);
    font-weight: 900;
    color: var(--text-primary);
    margin: 20px 0;
}

.price span {
    font-size: 0.35em;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-card.featured .price span {
    color: rgba(255, 255, 255, 0.8);
}

.pricing-card ul {
    list-style: none;
    margin: 25px 0;
}

.pricing-card li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
}

.pricing-card.featured li {
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.pricing-card li:before {
    content: "✓ ";
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 8px;
}

.pricing-card.featured li:before {
    color: #fbbf24;
}

/* ===== Project Pricing ===== */
.project-pricing {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin: 30px 0;
}

.project-pricing h4 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 800;
    font-size: 1.2rem;
}

.price-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px;
    background: white;
    border-radius: var(--border-radius);
    margin: 10px 0;
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.price-item:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.price-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

.price-item .amount {
    color: var(--primary-color);
    font-weight: 700;
    white-space: nowrap;
    font-size: 1.05rem;
}

/* ===== Special Elements ===== */
.savings-badge {
    background: linear-gradient(135deg, var(--accent-color), #059669);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9em;
    display: inline-block;
    margin: 10px 0;
    box-shadow: var(--shadow-sm);
}

.bundle-highlight {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 2px solid #f59e0b;
    border-radius: var(--border-radius-lg);
    padding: 40px;
    margin: 40px 0;
    text-align: center;
}

.bundle-highlight h3 {
    color: #92400e;
    font-size: clamp(1.5rem, 3vw, 1.8em);
    margin-bottom: 15px;
    font-weight: 800;
}

.bundle-highlight p {
    color: #78350f;
    margin: 15px 0;
    font-size: 1.05rem;
}

.payment-info {
    background: white;
    border-left: 4px solid var(--primary-color);
    padding: 30px;
    margin: 40px 0;
    border-radius: var(--border-radius);
}

.payment-info h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 800;
}

.payment-info h4 {
    color: var(--text-primary);
    margin: 20px 0 10px;
    font-weight: 700;
}

.payment-info ul {
    list-style: none;
}

.payment-info li {
    padding: 8px 0 8px 25px;
    color: var(--text-secondary);
    position: relative;
}

.payment-info li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ===== Comparison Table ===== */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    margin: 30px 0;
    box-shadow: var(--shadow-sm);
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.comparison-table th {
    padding: 18px;
    text-align: left;
    font-weight: 700;
}

.comparison-table td {
    padding: 15px 18px;
    border-bottom: 1px solid var(--border-light);
}

.comparison-table tbody tr:hover {
    background: var(--bg-secondary);
}

.check { 
    color: var(--accent-color); 
    font-weight: bold; 
    font-size: 1.2rem;
}

.cross { 
    color: var(--secondary-color); 
    font-weight: bold; 
    font-size: 1.2rem;
}

/* ===== FAQ Section ===== */
.faq-item {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    margin: 15px 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 20px 20px;
    color: var(--text-secondary);
    display: none;
    line-height: 1.7;
}

.faq-answer.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 70px 50px;
    text-align: center;
    border-radius: var(--border-radius-lg);
    margin: 60px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: float 30s linear infinite;
}

.cta-section h2 {
    font-size: clamp(2rem, 4vw, 2.5em);
    margin-bottom: 15px;
    font-weight: 900;
    position: relative;
    z-index: 1;
}

.cta-section p {
    font-size: clamp(1rem, 2vw, 1.2em);
    margin-bottom: 30px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.cta-button {
    background: white;
    color: var(--primary-color);
    padding: 16px 40px;
    border-radius: var(--border-radius);
    font-weight: 700;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* ===== Footer ===== */
.main-footer {
    background: var(--text-primary);
    color: #e8eaed;
    padding: 60px 20px 30px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    color: white;
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-section a {
    color: #e8eaed;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-section p {
    color: #e8eaed;
    margin-bottom: 10px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: #9aa0a6;
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tablet - 1024px and below */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        z-index: 999;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }

    .nav-menu.active {
        display: flex;
    }

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

    .nav-link {
        display: block;
        width: 100%;
        padding: 0.75rem;
        text-align: center;
    }

    .nav-cta {
        margin-left: 0;
        margin-top: 0.5rem;
        width: 100%;
        justify-content: center;
    }

    .language-switch {
        margin-left: 0;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--border-light);
        width: 100%;
        justify-content: center;
    }

    .section {
        padding: 40px 30px;
        margin: 30px 0;
    }

    .pricing-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }

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

    .pricing-card.featured:hover {
        transform: translateY(-8px);
    }

    .bundle-highlight,
    .payment-info {
        padding: 30px 20px;
    }

    .cta-section {
        padding: 50px 30px;
        margin: 40px 0;
    }

    .footer-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

/* Mobile - 768px and below */
@media (max-width: 768px) {
    .tabs-container {
        top: 80px;
    }

    .tabs {
        padding: 0 15px;
        gap: 6px;
    }

    .tab {
        padding: 10px 18px;
        font-size: 14px;
    }

    .section {
        padding: 30px 20px;
        border-radius: var(--border-radius);
        margin: 20px 0;
    }

    .section-header {
        margin-bottom: 30px;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .pricing-card {
        padding: 30px 20px;
    }

    .price-item {
        flex-direction: column;
        gap: 10px;
        padding: 15px;
        align-items: flex-start;
    }

    .price-item .amount {
        font-size: 1.1rem;
    }

    /* Table wrapper for horizontal scrolling */
    .comparison-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .comparison-table thead,
    .comparison-table tbody,
    .comparison-table tr {
        display: table;
        width: 100%;
        table-layout: fixed;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 10px;
        font-size: 0.9rem;
    }

    .bundle-highlight {
        padding: 25px 20px;
        margin: 30px 0;
    }

    .payment-info {
        padding: 25px 20px;
        margin: 30px 0;
    }

    .cta-section {
        padding: 40px 20px;
        margin: 40px 0;
        border-radius: var(--border-radius);
    }

    .cta-button {
        padding: 14px 30px;
        width: 100%;
        max-width: 300px;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-section {
        text-align: center;
    }
}

/* Small Mobile - 480px and below */
@media (max-width: 480px) {
    .nav-container {
        padding: 0.75rem 15px;
    }

    .logo img {
        height: 32px;
    }

    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 60px 15px;
    }

    .tabs {
        padding: 0 10px;
    }

    .tab {
        padding: 8px 14px;
        font-size: 13px;
    }

    .section {
        padding: 20px 15px;
        margin: 15px 0;
    }

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

    .section-header p {
        font-size: 0.95rem;
    }

    .pricing-card {
        padding: 25px 15px;
    }

    .pricing-card h4 {
        font-size: 1.3em;
    }

    .badge {
        top: 15px;
        right: 15px;
        padding: 5px 12px;
        font-size: 0.7em;
    }

    .pricing-card li {
        padding: 10px 0;
        font-size: 0.9rem;
    }

    .project-pricing {
        background: white;
        padding: 20px 15px;
    }

    .price-item {
        padding: 12px;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 10px 8px;
        font-size: 0.85rem;
    }

    .faq-question {
        padding: 15px;
        font-size: 0.95rem;
    }

    .faq-answer {
        padding: 0 15px 15px;
        font-size: 0.9rem;
    }

    .bundle-highlight {
        padding: 20px 15px;
    }

    .payment-info {
        padding: 20px 15px;
    }

    .payment-info h3 {
        font-size: 1.2rem;
    }

    .cta-section {
        padding: 30px 15px;
    }

    .cta-button {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .main-footer {
        padding: 40px 15px 20px;
    }

    .language-switch {
        flex-direction: row;
        gap: 0.25rem;
    }

    .lang-btn {
        flex: 1;
        text-align: center;
    }
}