/* Professional FAANG-level CSS */

/* CSS Variables & Design System */
:root {
    /* Colors */
    --primary: #00DC82;
    --primary-dark: #00A862;
    --primary-light: #00F892;
    --secondary: #7C3AED;
    --secondary-dark: #6D28D9;

    /* Neutrals */
    --neutral-50: #FAFAFA;
    --neutral-100: #F5F5F5;
    --neutral-200: #E5E5E5;
    --neutral-300: #D4D4D4;
    --neutral-400: #A3A3A3;
    --neutral-500: #737373;
    --neutral-600: #525252;
    --neutral-700: #404040;
    --neutral-800: #262626;
    --neutral-900: #171717;
    --neutral-950: #0A0A0A;

    /* Semantic */
    --bg-primary: #050505;
    --bg-secondary: #0A0A0A;
    --bg-tertiary: #111111;
    --bg-elevated: #181818;
    --text-primary: #FFFFFF;
    --text-secondary: #A3A3A3;
    --text-tertiary: #737373;
    --border-default: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);

    /* Typography Scale */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
    --font-4xl: 2.25rem;
    --font-5xl: 3rem;
    --font-6xl: 3.75rem;
    --font-7xl: 4.5rem;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 50px rgba(0, 220, 130, 0.3);

    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-slower: 500ms ease;

    /* Z-index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Container System */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm {
    max-width: 640px;
}

.container-md {
    max-width: 768px;
}

.container-lg {
    max-width: 1024px;
}

.container-xl {
    max-width: 1280px;
}

.container-2xl {
    max-width: 1536px;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Professional Navigation */
.navbar-professional {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-default);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

.navbar-professional.scrolled {
    height: 64px;
    background: rgba(5, 5, 5, 0.95);
}

.nav-container-pro {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo-pro {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu-pro {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link-pro {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: var(--space-2) 0;
}

.nav-link-pro::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

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

.nav-link-pro:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-default);
    padding: var(--space-6);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
}

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

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.mobile-menu-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-lg);
    font-weight: 500;
    padding: var(--space-3) 0;
    transition: color var(--transition-fast);
}

.mobile-menu-links a:hover {
    color: var(--primary);
}

.mobile-menu-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* Professional Hero Section */
.hero-professional {
    min-height: 100vh;
    padding: var(--space-32) 0 var(--space-24);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-background-pro {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -2;
}

.hero-gradient {
    position: absolute;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 220, 130, 0.15) 0%, transparent 70%);
    top: -400px;
    right: -200px;
    animation: float 20s ease-in-out infinite;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 220, 130, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 220, 130, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
}

.hero-content-pro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-text {
    max-width: 600px;
}

.hero-badge-pro {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 220, 130, 0.1);
    border: 1px solid rgba(0, 220, 130, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-6);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title-pro {
    font-size: clamp(var(--font-4xl), 6vw, var(--font-7xl));
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    background: linear-gradient(180deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-pro .gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle-pro {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-10);
}

.hero-actions-pro {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero-illustration {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-illustration img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* Professional Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--bg-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 220, 130, 0.3);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-lg);
}

/* Feature Cards */
.feature-grid-pro {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
}

.feature-card-pro {
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.feature-card-pro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card-pro:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 220, 130, 0.1);
}

.feature-card-pro:hover::before {
    opacity: 1;
}

.feature-icon-pro {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-6);
}

.feature-icon-pro img {
    width: 100%;
    height: 100%;
}

.feature-title-pro {
    font-size: var(--font-xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.feature-description-pro {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.feature-list-pro {
    list-style: none;
    space-y: var(--space-3);
}

.feature-list-pro li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--text-secondary);
    padding: var(--space-2) 0;
}

.feature-list-pro li::before {
    content: '';
    width: 20px;
    height: 20px;
    background: rgba(0, 220, 130, 0.1);
    border: 1px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* Stats Section */
.stats-grid-pro {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
    padding: var(--space-12) 0;
    border-top: 1px solid var(--border-default);
    border-bottom: 1px solid var(--border-default);
}

.stat-item-pro {
    text-align: center;
}

.stat-number-pro {
    font-size: var(--font-5xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label-pro {
    font-size: var(--font-sm);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: var(--space-2);
}

/* Testimonial Cards */
.testimonial-grid-pro {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.testimonial-card-pro {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-secondary));
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    position: relative;
}

.testimonial-quote-pro {
    font-size: var(--font-lg);
    line-height: 1.8;
    margin-bottom: var(--space-6);
    position: relative;
}

.testimonial-quote-pro::before {
    content: '"';
    font-size: var(--font-6xl);
    color: var(--primary);
    opacity: 0.2;
    position: absolute;
    top: -20px;
    left: -10px;
}

.testimonial-author-pro {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.author-avatar-pro {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.author-info-pro h4 {
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--text-primary);
}

.author-info-pro p {
    font-size: var(--font-sm);
    color: var(--text-secondary);
}

/* Pricing Cards */
.pricing-grid-pro {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    align-items: stretch;
}

.pricing-card-pro {
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card-pro.featured {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 220, 130, 0.2);
}

.pricing-card-pro.featured::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--bg-primary);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--font-xs);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.pricing-header-pro {
    text-align: center;
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--border-default);
}

.pricing-title-pro {
    font-size: var(--font-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.pricing-price-pro {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.price-currency {
    font-size: var(--font-xl);
    color: var(--text-secondary);
}

.price-amount {
    font-size: var(--font-5xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    font-size: var(--font-lg);
    color: var(--text-secondary);
}

.pricing-features-pro {
    list-style: none;
    padding: var(--space-8) 0;
    flex: 1;
}

.pricing-features-pro li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    color: var(--text-secondary);
}

.check-icon {
    width: 20px;
    height: 20px;
    background: rgba(0, 220, 130, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.check-icon svg {
    width: 12px;
    height: 12px;
    stroke: var(--primary);
    stroke-width: 3;
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(1deg); }
    66% { transform: translateY(5px) rotate(-1deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.1); }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content-pro {
        grid-template-columns: 1fr;
        text-align: center;
        justify-items: center;
    }

    .hero-text {
        max-width: 600px;
        margin: 0 auto;
    }

    .hero-illustration {
        height: 400px;
        margin-top: var(--space-8);
        justify-self: center;
    }

    .pricing-grid-pro {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

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

/* Switch to mobile menu earlier to prevent button malformation */
@media (max-width: 920px) {
    .nav-menu-pro {
        display: none;
    }

    .nav-actions {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }
}

@media (max-width: 768px) {
    .feature-grid-pro {
        grid-template-columns: 1fr;
    }

    .stats-grid-pro {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title-pro {
        font-size: var(--font-4xl);
    }

    .hero-illustration {
        display: none;
    }

    .hero-actions-pro {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-actions-pro .btn {
        flex: 1;
        min-width: 140px;
    }
}

@media (max-width: 480px) {
    .hero-actions-pro {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .stats-grid-pro {
        grid-template-columns: 1fr;
    }

    .mobile-menu-actions .btn {
        width: 100%;
    }
}