/* ========== Variables ========== */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #ec4899;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;

    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --gray-lighter: #f1f5f9;
    --white: #ffffff;

    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ========== Container ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== Header ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav__logo-img {
    width: 40px;
    height: 40px;
}

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

.nav__link {
    font-weight: 500;
    color: var(--dark);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav__link:hover::after {
    width: 100%;
}

.nav__controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-switcher {
    padding: 0.5rem 1rem;
    background: var(--gray-lighter);
    border-radius: var(--radius);
    font-weight: 600;
}

.lang-switcher:hover {
    background: var(--gray-light);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    padding: 5px;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* ========== Buttons ========== */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
}

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

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

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

.btn--outline:hover {
    background: var(--primary);
    color: var(--white);
}

.btn--ghost {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.btn--ghost:hover {
    background: rgba(99, 102, 241, 0.2);
}

.btn--danger {
    background: var(--danger);
    color: var(--white);
}

.btn--danger:hover {
    background: #dc2626;
}

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

.btn--full {
    width: 100%;
}

/* ========== Hero Section ========== */
.hero {
    position: relative;
    padding: 10rem 0 6rem;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    z-index: -1;
}

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

.hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

.hero__buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero__stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: center;
}

.stat__value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat__label {
    font-size: 0.875rem;
    color: var(--gray);
}

.hero__image {
    position: relative;
}

.hero__img {
    width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

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

/* ========== Section ========== */
section {
    padding: 5rem 0;
}

.section__title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--gray);
    text-align: center;
    margin-bottom: 3rem;
}

/* ========== Features ========== */
.features {
    background: var(--gray-lighter);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-card__icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

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

.feature-card__text {
    color: var(--gray);
}

/* ========== Pricing ========== */
.pricing__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--white);
    border: 2px solid var(--gray-lighter);
    border-radius: var(--radius-xl);
    padding: 2rem;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.pricing-card--featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
}

.pricing-card__badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.875rem;
}

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

.pricing-card__name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.pricing-card__price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
}

.pricing-card__amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.pricing-card__currency {
    font-size: 1.25rem;
    color: var(--gray);
}

.pricing-card__save {
    margin-top: 0.5rem;
    color: var(--success);
    font-weight: 600;
}

.pricing-card__features {
    margin-bottom: 2rem;
}

.pricing-card__features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-lighter);
}

.pricing-card__features li:last-child {
    border-bottom: none;
}

/* ========== Footer ========== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 4rem 0 2rem;
}

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

.footer__logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer__logo img {
    width: 40px;
    height: 40px;
}

.footer__text {
    color: var(--gray-light);
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer__title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer__link {
    display: block;
    color: var(--gray-light);
    padding: 0.5rem 0;
}

.footer__link:hover {
    color: var(--white);
}

.footer__bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--dark-light);
    color: var(--gray-light);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__buttons {
        justify-content: center;
    }

    .hero__stats {
        justify-content: center;
    }

    .hero__image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav__menu {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    .hero {
        padding: 8rem 0 4rem;
    }

    .hero__title {
        font-size: 2rem;
    }

    .hero__buttons {
        flex-direction: column;
    }

    .hero__stats {
        flex-direction: column;
        gap: 1rem;
    }

    .pricing__grid,
    .features__grid {
        grid-template-columns: 1fr;
    }

    .footer__content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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