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

:root {
    --color-primary: #1a56db;
    --color-primary-dark: #1340a8;
    --color-accent: #fbbf24;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-inverse: #f1f5f9;
    --color-border: #e2e8f0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 20px 40px -12px rgb(0 0 0 / 0.12);
    --transition: 0.3s ease;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
}

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

/* === Header === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo__img {
    height: 36px;
    width: auto;
}

.logo__img--footer {
    height: 32px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
    transition: color var(--transition);
}

.nav__link:hover {
    color: var(--color-primary);
}

/* === Language Switch === */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 6px 14px;
    cursor: pointer;
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 600;
    transition: all var(--transition);
}

.lang-switch:hover {
    border-color: var(--color-primary);
    background: #eff6ff;
}

.lang-switch__current {
    color: var(--color-primary);
}

.lang-switch__separator {
    color: var(--color-border);
}

.lang-switch__other {
    color: var(--color-text-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* === Hero === */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 50%, #fefce8 100%);
}

.hero__inner {
    max-width: 720px;
}

.hero__title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    color: var(--color-bg-dark);
    margin-bottom: 24px;
}

.hero__subtitle {
    font-size: 1.2rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 600px;
}

.hero__buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgb(26 86 219 / 0.3);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgb(26 86 219 / 0.4);
}

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

.btn--outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* === Sections === */
.section__title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section__subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 56px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

/* === Services === */
.services {
    padding: 100px 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.card__icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.card__icon svg,
.card__icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card__title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.card__text {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* === About === */
.about {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about__text p {
    margin-bottom: 16px;
    color: var(--color-text-light);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about__text p:first-child {
    color: var(--color-text);
    font-size: 1.15rem;
    font-weight: 500;
}

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

.stat {
    text-align: center;
    padding: 24px;
    background: var(--color-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.stat__number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -1px;
}

.stat__label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

/* === Approach === */
.approach {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.approach__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.approach__step {
    position: relative;
    padding: 32px 24px;
    background: var(--color-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.approach__step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.approach__number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    opacity: 0.2;
    margin-bottom: 12px;
    line-height: 1;
}

.approach__title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.approach__text {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* === Technologies === */
.technologies {
    padding: 100px 0;
}

.tech__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 16px;
}

.tech__item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text);
    transition: all var(--transition);
}

.tech__item:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: #eff6ff;
}

/* === Why Us === */
.why-us {
    padding: 100px 0;
}

.why-us__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.why-us__item {
    text-align: center;
    padding: 40px 24px;
}

.why-us__icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    color: var(--color-primary);
}

.why-us__icon svg {
    width: 100%;
    height: 100%;
}

.why-us__title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.why-us__text {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* === Contact === */
.contact {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.contact__content {
    display: flex;
    justify-content: center;
}

.contact__email {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-primary);
    padding: 20px 40px;
    background: var(--color-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.contact__email:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.contact__icon {
    width: 28px;
    height: 28px;
}

/* === Footer === */
.footer {
    background: var(--color-bg-dark);
    padding: 48px 0;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}

.footer__links {
    display: flex;
    gap: 24px;
}

.footer__link {
    color: var(--color-text-light);
    font-size: 0.9rem;
    transition: color var(--transition);
}

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

.footer__tagline {
    color: var(--color-text-light);
    font-size: 0.85rem;
    margin-top: 4px;
}

.footer__copy {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        padding: 32px 0;
        gap: 24px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .hero {
        padding: 130px 0 80px;
    }

    .hero__buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .about__content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .footer__inner {
        flex-direction: column;
        text-align: center;
    }

    .footer__links {
        flex-wrap: wrap;
        justify-content: center;
    }
}