@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #6a5af9;
    --primary-hover: #5a4af9;
    --secondary-color: #f6f6f9;
    --text-color: #333;
    --text-light: #6c757d;
    --background-color: #ffffff;
    --card-background: rgba(255, 255, 255, 0.8);
    --border-color: #e9ecef;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
    --border-radius: 20px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --secondary-color: #121212;
        --text-color: #e0e0e0;
        --text-light: #a0a0a0;
        --background-color: #1e1e1e;
        --card-background: rgba(30, 30, 30, 0.7);
        --border-color: #333;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--secondary-color);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(129, 230, 217, 0.15), transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(106, 90, 249, 0.15), transparent 45%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.4), transparent 55%);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    padding: 1.2rem 0;
    transition: var(--transition);
}

@media (prefers-color-scheme: dark) {
    header {
        background: rgba(30, 30, 30, 0.6);
    }
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary-color), #da62c4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

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

.nav-links a:hover::after {
    width: 100%;
}

.hero {
    text-align: center;
    padding: clamp(5rem, 10vw, 6.5rem) 0 clamp(2.5rem, 8vw, 3.5rem);
    background: transparent;
}

.hero .container {
    display: grid;
    gap: 2.5rem;
    justify-items: center;
}

.hero h1 {
    font-size: clamp(2.6rem, 6vw, 4rem);
    margin-bottom: 1rem;
    line-height: 1.15;
    background: linear-gradient(45deg, var(--text-color), var(--text-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: clamp(1.08rem, 2.3vw, 1.28rem);
    margin-bottom: 2.5rem;
    color: var(--text-light);
    max-width: 720px;
    text-wrap: balance;
}

.cta-button {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 1.2rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 6px 20px rgba(106, 90, 249, 0.4);
}

.cta-button:hover {
    background: var(--primary-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(106, 90, 249, 0.5);
}

.content-section {
    background: var(--card-background);
    margin: 3rem 0;
    border-radius: var(--border-radius);
    padding: clamp(2.5rem, 5vw, 3.5rem);
    box-shadow: var(--shadow);
    border: 1px solid color-mix(in srgb, var(--border-color) 75%, transparent);
    backdrop-filter: blur(12px) saturate(160%);
    -webkit-backdrop-filter: blur(12px) saturate(160%);
    transition: var(--transition);
    contain: content;
}

.content-section.animate-on-scroll {
    overflow: clip;
}

.section-title {
    font-size: 3rem;
    color: var(--text-color);
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 70px;
    height: 5px;
    background: var(--primary-color);
    margin: 1.2rem auto 0;
    border-radius: 3px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: clamp(1.8rem, 4vw, 2.4rem);
    margin-top: clamp(2.6rem, 5vw, 3rem);
}

.feature-card {
    background: var(--secondary-color);
    padding: clamp(1.8rem, 4vw, 2.3rem);
    border-radius: calc(var(--border-radius) - 4px);
    transition: var(--transition);
    border: 1px solid color-mix(in srgb, var(--border-color) 80%, transparent);
    box-shadow: none;
    position: relative;
    isolation: isolate;
    will-change: transform;
}

.feature-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(106, 90, 249, 0.18), transparent 55%);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover);
    border-color: rgba(106, 90, 249, 0.3);
}

.feature-card h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.32rem;
}

.feature-card h3 .feature-icon {
    font-size: 1.45rem;
}

.feature-card ul,
.feature-card p {
    color: var(--text-light);
}

.feature-card li {
    margin-bottom: 0.65rem;
    position: relative;
    padding-left: 1.6rem;
}

.feature-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.pros-cons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: clamp(1.8rem, 4vw, 2.6rem);
    margin-top: clamp(2.4rem, 5vw, 3rem);
}

.pros, .cons {
    background: var(--secondary-color);
    padding: clamp(1.8rem, 4vw, 2.5rem);
    border-radius: calc(var(--border-radius) - 6px);
    border-left: 4px solid;
    border: 1px solid color-mix(in srgb, var(--border-color) 84%, transparent);
    box-shadow: 0 10px 24px rgba(0,0,0,0.05);
}

.pros { border-color: var(--success-color); }
.cons { border-color: var(--danger-color); }

.pros h3, .cons h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}
.pros h3 { color: var(--success-color); }
.cons h3 { color: var(--danger-color); }

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: clamp(1.8rem, 4vw, 2.5rem);
    margin-top: clamp(2.2rem, 5vw, 3rem);
}

.pricing-card {
    background: var(--secondary-color);
    border: 1px solid color-mix(in srgb, var(--border-color) 80%, transparent);
    border-radius: calc(var(--border-radius) - 4px);
    padding: clamp(1.8rem, 4vw, 2.4rem);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: none;
    will-change: transform;
}

.pricing-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(106, 90, 249, 0.2), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.pricing-card:hover::after {
    opacity: 1;
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(106, 90, 249, 0.35), var(--shadow);
    transform: scale(1.04);
}

.pricing-card.featured::before {
    content: attr(data-recommendation);
    position: absolute;
    top: 18px;
    right: -32px;
    background: var(--primary-color);
    color: white;
    padding: 6px 42px;
    transform: rotate(45deg);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.6px;
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.85rem;
}

.plan-price {
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.4rem;
}

.plan-period {
    color: var(--text-light);
    margin-bottom: 1.8rem;
}

.plan-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2.1rem;
    color: var(--text-light);
}

.plan-features li {
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 1.5rem;
}

.plan-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

.plan-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.9rem 2.2rem;
    border-radius: 45px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.plan-button:hover {
    background: var(--primary-hover);
    box-shadow: 0 8px 18px rgba(106, 90, 249, 0.3);
}

.language-switcher {
    margin-left: 2rem;
    position: relative;
    display: inline-flex;
    z-index: 10;
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.45rem 0.85rem;
    border-radius: 999px;
    background: rgba(106, 90, 249, 0.08);
    border: 1px solid rgba(106, 90, 249, 0.12);
    color: inherit;
    transition: var(--transition);
}

.lang-btn:hover,
.lang-btn:focus-visible {
    background: rgba(106, 90, 249, 0.16);
    border-color: rgba(106, 90, 249, 0.24);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    display: grid;
    gap: 0.4rem;
    padding: 0.6rem;
    border-radius: 12px;
    background: var(--background-color);
    border: 1px solid rgba(106, 90, 249, 0.16);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--transition);
    min-width: 160px;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.75rem;
    border-radius: 10px;
    transition: var(--transition);
    color: inherit;
}

.lang-option:hover,
.lang-option:focus-visible {
    background: rgba(106, 90, 249, 0.12);
}

.lang-option.active {
    background: rgba(106, 90, 249, 0.2);
    color: var(--primary-color);
}

.dark-theme .lang-btn,
@media (prefers-color-scheme: dark) {
    .lang-btn {
        background: rgba(106, 90, 249, 0.16);
        border-color: rgba(106, 90, 249, 0.24);
    }

    .lang-dropdown {
        background: rgba(30, 30, 30, 0.96);
        border-color: rgba(106, 90, 249, 0.28);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    }
}

.comparison-table {
    overflow-x: auto;
    margin-top: clamp(2.5rem, 5vw, 3rem);
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-background);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.comparison-table table.stacked-layout {
    min-width: auto;
}

.comparison-table th,
.comparison-table td {
    padding: clamp(1rem, 2.5vw, 1.2rem) clamp(1.2rem, 3vw, 1.5rem);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: transparent;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
    border-bottom: 2px solid var(--primary-color);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background-color: var(--secondary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transform: scale(1.01);
}

footer {
    text-align: center;
    padding: 2.4rem 0;
    margin-top: 3.5rem;
    color: var(--text-light);
    background: var(--background-color);
    border-top: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: clamp(1.5rem, 4vw, 2.3rem);
    width: min(860px, 100%);
}

.stat-card {
    position: relative;
    padding: 1.6rem 1.4rem;
    border-radius: 16px;
    background: linear-gradient(160deg, rgba(255,255,255,0.85), rgba(245,242,255,0.95));
    border: 1px solid rgba(106, 90, 249, 0.18);
    box-shadow: 0 12px 28px rgba(106, 90, 249, 0.12);
    overflow: hidden;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    will-change: transform;
}

.stat-card::before {
    content: "";
    position: absolute;
    inset: -30% -10% auto;
    height: 65%;
    background: radial-gradient(circle at top, rgba(106, 90, 249, 0.25), transparent 70%);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.stat-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 18px 36px rgba(106, 90, 249, 0.22);
}

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

.stat-number {
    font-size: clamp(1.8rem, 4.5vw, 2.4rem);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.5;
}

@media (max-width: 992px) {
    .content-section {
        padding: clamp(2rem, 5vw, 2.8rem);
    }

    .stats-grid {
        width: 100%;
    }
}

@media (max-width: 864px) {
    header {
        padding: 0.9rem 0;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding-top: clamp(4rem, 16vw, 5.5rem);
    }
}

@media (max-width: 640px) {
    body {
        background-image: none;
    }

    .container {
        padding: 0 18px;
    }

    .comparison-table table {
        min-width: 100%;
    }

    .hero h1 {
        font-size: clamp(2.1rem, 8vw, 2.6rem);
    }

    .hero p {
        font-size: clamp(1rem, 4vw, 1.12rem);
    }

    .cta-button {
        padding: 1rem 2.5rem;
    }

    .pros, .cons {
        padding: 1.6rem;
    }

    .pricing-card.featured::before {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.highlight {
    background-color: rgba(106, 90, 249, 0.12);
    padding: 0.18rem 0.5rem;
    border-radius: 6px;
    font-weight: 600;
    color: var(--primary-color);
}

@media (prefers-color-scheme: dark) {
    .highlight {
        background-color: rgba(106, 90, 249, 0.25);
    }
}

.tech-stack {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2.5rem 0 1rem;
    flex-wrap: wrap;
}

.tech-badge {
    background: var(--card-background);
    color: var(--text-light);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    font-size: 0.92rem;
    font-weight: 500;
    border: 1px solid color-mix(in srgb, var(--border-color) 82%, transparent);
    transition: transform 0.3s ease, background 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.tech-badge::before {
    content: attr(data-icon);
}

.tech-badge:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-3px);
}