/* ==========================================================================
   CSS Variables & Theme
   ========================================================================== */
   :root {
    /* Colors - Trustworthy, modern, educational palette */
    --primary: #3b82f6;      /* Bright Blue */
    --primary-dark: #2563eb;
    --primary-light: #eff6ff;
    
    --secondary: #8b5cf6;    /* Vibrant Purple */
    --success: #10b981;      /* Emerald Green */
    --warning: #f59e0b;      /* Amber */
    
    --text-main: #1e293b;    /* Slate 800 */
    --text-muted: #64748b;   /* Slate 500 */
    --text-light: #f8fafc;   /* Slate 50 */
    
    --bg-main: #ffffff;
    --bg-alt: #f1f5f9;       /* Slate 100 */
    
    --border-color: #e2e8f0; /* Slate 200 */

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Shadows - Soft, modern » Glassmorphism hints */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   Utility Classes & Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
}

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

.bg-light {
    background-color: var(--bg-alt);
}

.w-50 { width: 50%; }
.w-75 { width: 75%; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.logo-img {
    height: 32px;
    width: 32px;
    border-radius: 6px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a:not(.btn) {
    color: var(--text-muted);
    font-weight: 500;
}

.nav-links a:not(.btn):hover {
    color: var(--primary);
}

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

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    padding-top: 8rem;
    padding-bottom: 6rem;
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, rgba(239, 246, 255, 0.5) 0%, rgba(255, 255, 255, 0) 100%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    z-index: 2;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.hero-title span {
    color: var(--primary);
    position: relative;
    display: inline-block;
}

/* Add a subtle underline decoration to the span */
.hero-title span::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: rgba(59, 130, 246, 0.2);
    z-index: -1;
    border-radius: 4px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 90%;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.hero-social-proof {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.avatars {
    display: flex;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid white;
    background-color: #cbd5e1;
    margin-left: -10px;
}

.avatar:first-child { margin-left: 0; background-color: #94a3b8; }
.avatar:nth-child(2) { background-color: var(--primary-light); }
.avatar:nth-child(3) { background-color: #e2e8f0; }
.avatar:nth-child(4) { background-color: var(--secondary); opacity: 0.5;}

.hero-image {
    position: relative;
    z-index: 1;
}

/* Decorative Background Elements */
.decoration {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    z-index: -1;
    opacity: 0.6;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background-color: rgba(59, 130, 246, 0.3);
    top: -50px;
    right: -50px;
}

.circle-2 {
    width: 250px;
    height: 250px;
    background-color: rgba(139, 92, 246, 0.2);
    bottom: -50px;
    left: 10%;
}

/* Browser Mockup */
.browser-mockup {
    background: white;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
    position: relative;
    transform: rotate(2deg) translateY(-10px);
    transition: transform var(--transition-normal);
}

.browser-mockup:hover {
    transform: rotate(0deg) translateY(-15px);
}

.browser-header {
    background: #f1f5f9;
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.browser-content {
    padding: 2rem;
    background: white;
    min-height: 300px;
    position: relative;
}

/* Skeleton Loading Animation for empty state */
.placeholder-skeleton {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skeleton {
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 0.25rem;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton.title { height: 2rem; width: 60%; margin-bottom: 1rem; }
.skeleton.text { height: 1rem; width: 100%; }
.skeleton.sm { height: 0.75rem; }
.skeleton.xs { height: 0.5rem; }

/* Fake Extension popup inside the browser */
.extension-mockup {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 200px;
    background: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    animation: float 3s ease-in-out infinite alternate;
}

@keyframes float {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

.ext-header {
    background: var(--primary);
    color: white;
    padding: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ext-icon { width: 16px; height: 16px; border-radius: 2px;}

.ext-body {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.ext-comment {
    background: var(--primary-light);
    border-left: 3px solid var(--primary);
    padding: 0.5rem;
    border-radius: 0 0.25rem 0.25rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.section-header {
    max-width: 800px;
    margin: 0 auto 4rem auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.3);
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem; /* Shrunk slightly */
    margin-bottom: 1.5rem;
    background-color: var(--bg-alt); /* Light grey square */
    box-shadow: var(--shadow-sm);
    color: var(--text-main); /* Default color overridden by utility classes */
}

.text-blue { color: var(--primary); }
.text-purple { color: var(--secondary); }
.text-green { color: var(--success); }
.text-orange { color: var(--warning); }

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.feature-desc {
    color: var(--text-muted);
    line-height: 1.6;
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

/* Vertical line connecting steps */
.steps-container::before {
    content: '';
    position: absolute;
    top: 2rem;
    bottom: 2rem;
    left: 24px;
    width: 2px;
    background-color: var(--border-color);
    z-index: 0;
}

.step {
    display: flex;
    gap: 2rem;
    position: relative;
    z-index: 1;
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.step-number {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 0 0 8px white;
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 2rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-xl);
}

.cta-box h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-box p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-box .btn-primary {
    background-color: white;
    color: var(--primary-dark);
}

.cta-box .btn-primary:hover {
    background-color: var(--bg-alt);
    transform: translateY(-2px);
}

.cta-guarantee {
    font-size: 0.875rem !important;
    margin-top: 1rem;
    opacity: 0.7 !important;
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border-radius: 1rem;
    padding: 2.5rem 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all var(--transition-normal);
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.3);
}

.pricing-card.popular {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.02);
}

.pricing-card.popular:hover {
    transform: scale(1.02) translateY(-5px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
}

.pricing-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.pricing-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    margin-top: 1rem;
}

.pricing-currency {
    font-size: 1.25rem;
    font-weight: 600;
    align-self: flex-start;
    margin-top: 0.5rem;
}

.pricing-period {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: normal;
}

.pricing-features {
    flex-grow: 1;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.pricing-features i {
    color: var(--success);
    margin-top: 0.25rem;
}

.pricing-disclaimer {
    max-width: 800px;
    margin: 4rem auto 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #0f172a; /* Slate 900 */
    color: var(--text-light);
    padding: 4rem 0 2rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-brand .logo {
    color: white;
}

.footer-brand p {
    color: #94a3b8; /* Slate 400 */
    font-size: 0.875rem;
    max-width: 300px;
}

.footer-links h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: white;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: #94a3b8;
    font-size: 0.875rem;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155; /* Slate 700 */
    padding-top: 2rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.875rem;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        align-items: center;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        max-width: 100%;
    }

    .hero-cta {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none; 
        flex-direction: column;
        position: absolute;
        top: 4.5rem;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 2rem 1.5rem;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
        gap: 1.5rem;
    }

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

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

    .section {
        padding: 4rem 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .step {
        flex-direction: column;
        gap: 1rem;
        padding: 2rem;
        text-align: center;
        align-items: center;
    }

    .steps-container::before {
        display: none; /* Hide vertical line on mobile */
    }
    
    .step-number {
        position: static;
        margin-bottom: 0.5rem;
        box-shadow: none; /* Remove white ring */
    }

    .cta-box h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}