/* Base tokens */
:root {
    --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --color-primary: #4263eb;
    --color-primary-dark: #2740c9;
    --color-secondary: #f1f5ff;
    --color-accent: #0ca678;
    --color-background: #f8f9fb;
    --color-surface: #ffffff;
    --color-text: #1f2933;
    --color-muted: #516375;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-md: 0 20px 45px rgba(66, 99, 235, 0.15);
    --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
    --max-width: 1120px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

img {
    max-width: 100%;
    display: block;
    border-radius: var(--radius-md);
}

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

p {
    color: var(--color-muted);
    margin: 0 0 1rem;
}

h1,
h2,
h3 {
    color: var(--color-text);
    line-height: 1.2;
    margin: 0 0 1rem;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.section {
    padding: 80px 20px;
}

.section__header {
    text-align: center;
    margin: 0 auto 48px;
    max-width: 720px;
}

.card-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 999px;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.btn--primary:hover,
.btn--primary:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(66, 99, 235, 0.28);
}

.btn--secondary {
    background: rgba(66, 99, 235, 0.1);
    color: var(--color-primary);
    border: 1px solid rgba(66, 99, 235, 0.2);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
    transform: translateY(-2px);
    background: rgba(66, 99, 235, 0.16);
}

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

/* Hero */
.hero {
    padding: 40px 20px 80px;
    background: radial-gradient(circle at top left, rgba(66, 99, 235, 0.15), rgba(66, 99, 235, 0)) center/cover,
        linear-gradient(135deg, #eef1ff 0%, #f9fbff 100%);
}

.site-header {
    position: sticky;
    top: 16px;
    z-index: 20;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 14px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-radius: 22px;
    box-shadow: var(--shadow-soft);
}

.site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.site-header__logo {
    max-height: 40px;
    width: auto;
}

.site-header__nav {
    display: flex;
    align-items: center;
}

.site-header__menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 22px;
    font-weight: 500;
}

.site-header__menu a {
    color: var(--color-text);
    transition: color 0.2s ease;
}

.site-header__menu a:hover,
.site-header__menu a:focus-visible {
    color: var(--color-primary);
}

.site-header__menu .btn {
    padding: 10px 22px;
}

.site-header__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 10px;
    transition: background-color 0.2s ease;
}

.site-header__toggle:focus-visible,
.site-header__toggle:hover {
    background: rgba(66, 99, 235, 0.1);
}

.site-header__toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    margin: 4px 0;
    border-radius: 1px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header__toggle.is-open .site-header__toggle-bar:nth-of-type(2) {
    transform: translateY(6px) rotate(45deg);
}

.site-header__toggle.is-open .site-header__toggle-bar:nth-of-type(3) {
    opacity: 0;
}

.site-header__toggle.is-open .site-header__toggle-bar:nth-of-type(4) {
    transform: translateY(-6px) rotate(-45deg);
}

.hero__content {
    max-width: var(--max-width);
    margin: 60px auto 0;
    display: grid;
    gap: 48px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    align-items: center;
}

.hero__text h1 {
    font-size: clamp(2.4rem, 4vw, 3.4rem);
    margin-bottom: 24px;
}

.hero__text p {
    font-size: 1.125rem;
}

.hero__tagline {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(12, 166, 120, 0.08);
    color: var(--color-accent);
    border-radius: 999px;
    font-weight: 600;
    margin-bottom: 18px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 24px 0 32px;
}

.hero__social-proof {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
    color: var(--color-muted);
}

.hero__image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.hero__image figcaption {
    margin-top: 12px;
    font-size: 0.9rem;
    color: var(--color-muted);
}

/* Cards */
.card {
    background: var(--color-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.16);
}

.card__icon {
    font-size: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: rgba(66, 99, 235, 0.12);
    margin-bottom: 18px;
}

.card-grid--services {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.service-card {
    background: var(--color-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(82, 94, 113, 0.08);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 42px rgba(66, 99, 235, 0.18);
}

.service-card ul {
    margin: 16px 0 0;
    padding-left: 18px;
    color: var(--color-muted);
}

/* About */
.about {
    background: var(--color-surface);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(66, 99, 235, 0.15), transparent 55%);
    pointer-events: none;
}

.about__grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    gap: 40px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    position: relative;
    z-index: 1;
}

.about__text p {
    font-size: 1.05rem;
}

.about__credentials {
    list-style: none;
    padding: 0;
    margin: 32px 0 0;
    display: grid;
    gap: 12px;
}

.about__credentials li {
    position: relative;
    padding-left: 28px;
    color: var(--color-muted);
}

.about__credentials li::before {
    content: "✔";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-accent);
    font-weight: 600;
}

/* Testimonials */
.testimonials {
    background: linear-gradient(135deg, rgba(66, 99, 235, 0.05) 0%, rgba(12, 166, 120, 0.08) 100%);
}

.testimonial-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.testimonial-card {
    background: var(--color-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.testimonial-card blockquote {
    margin: 0 0 18px;
    font-size: 1.05rem;
    color: var(--color-text);
}

.testimonial-card figcaption {
    font-size: 0.95rem;
    color: var(--color-muted);
}

/* Process */
.process__steps {
    list-style: none;
    padding: 0;
    margin: 0 auto 36px;
    max-width: 860px;
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.process__steps li {
    background: var(--color-surface);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.process__note {
    text-align: center;
    font-weight: 500;
    color: var(--color-primary);
}

/* CTA */
.section--accent {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
}

.cta__content {
    max-width: 760px;
    margin: 0 auto;
}

.cta__content p {
    color: rgba(255, 255, 255, 0.85);
}

.contact-form {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-top: 32px;
    display: grid;
    gap: 18px;
    color: var(--color-text);
}

.form__row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form__row label {
    font-weight: 600;
}

.form__row input,
.form__row select,
.form__row textarea {
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(82, 94, 113, 0.2);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form__row input:focus,
.form__row select:focus,
.form__row textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(66, 99, 235, 0.15);
}

.form__row--inline {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.form__checkbox {
    display: flex;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.form__checkbox input {
    width: 18px;
    height: 18px;
}

.cta__disclaimer {
    margin-top: 18px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.75);
    text-align: center;
}

/* FAQ */
.faq__list {
    max-width: 880px;
    margin: 0 auto;
    display: grid;
    gap: 16px;
}

.faq__item {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.faq__question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    font-size: 1.05rem;
    font-weight: 600;
    padding: 24px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s ease;
    color: var(--color-text);
}

.faq__question::after {
    content: "+";
    font-size: 1.4rem;
    color: var(--color-primary);
    transition: transform 0.2s ease;
}

.faq__question[aria-expanded="true"]::after {
    transform: rotate(45deg);
}

.faq__question:hover,
.faq__question:focus-visible {
    background: rgba(66, 99, 235, 0.08);
}

.faq__answer {
    display: none;
    padding: 0 28px 24px;
}

.faq__answer p {
    margin: 0;
    color: var(--color-muted);
}

.faq__answer.is-open {
    display: block;
}

/* Footer */
.footer {
    padding: 60px 20px 32px;
    background: #0f172a;
    color: rgba(255, 255, 255, 0.9);
}

.footer a {
    color: rgba(255, 255, 255, 0.85);
}

.footer__grid {
    max-width: var(--max-width);
    margin: 0 auto 32px;
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer__social {
    list-style: none;
    padding: 0;
    margin: 12px 0 0;
    display: grid;
    gap: 8px;
}

.footer__bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 18px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.65);
}

.footer__links {
    display: flex;
    gap: 18px;
}

.footer__signature {
    color: rgba(255, 255, 255, 0.75);
}

.footer__links a:hover {
    text-decoration: underline;
}

/* Responsive tweaks */
@media (max-width: 1024px) {
    .site-header {
        gap: 16px;
        padding: 12px 18px;
    }

    .site-header__menu {
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .site-header {
        position: sticky;
        top: 12px;
    }

    .site-header__toggle {
        display: inline-flex;
        flex-direction: column;
    }

    .site-header__nav {
        position: absolute;
        right: 18px;
        top: calc(100% + 12px);
        width: min(280px, calc(100vw - 36px));
        background: #fff;
        border-radius: 20px;
        box-shadow: 0 22px 48px rgba(15, 23, 42, 0.2);
        padding: 18px;
        display: none;
    }

    .site-header__nav.is-open {
        display: block;
    }

    .site-header__menu {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .site-header__menu a {
        display: block;
        padding: 10px 4px;
    }

    .site-header__menu .btn {
        width: 100%;
        justify-content: center;
        margin-top: 8px;
    }

    .hero {
        padding-top: 100px;
    }

    .hero__content {
        margin-top: 48px;
    }

    .hero__actions {
        flex-direction: column;
    }

    .section {
        padding: 64px 16px;
    }

    .contact-form {
        padding: 24px;
    }

    .faq__question {
        font-size: 1rem;
        padding: 20px 22px;
    }

    .faq__answer {
        padding: 0 22px 20px;
    }
}

@media (max-width: 480px) {
    .hero__text h1 {
        font-size: 2.1rem;
    }

    .btn {
        width: 100%;
    }

    .card,
    .service-card,
    .testimonial-card,
    .process__steps li {
        padding: 24px;
    }
}