:root {
    --color-bg: #ffffff;
    --color-surface: #f1f3f5;
    --color-primary: #1d4f6a;
    --color-primary-light: #2f6f91;
    --color-accent: #d6a66b;
    --color-text: #1a1f24;
    --color-text-muted: #4f5b66;
    --color-border: #dce1e6;
    --font-base: 'Manrope', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', 'Times New Roman', serif;
    --container-width: 1120px;
    --transition: 180ms ease;
    --shadow-soft: 0 20px 45px rgba(17, 27, 39, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

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

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

ul {
    list-style: none;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: 999px;
    transition: transform var(--transition);
}

.skip-link:focus {
    top: 16px;
}

.container {
    width: min(100% - 2.5rem, var(--container-width));
    margin: 0 auto;
}

.section {
    padding: clamp(4rem, 10vw, 6rem) 0;
}

.section--tinted {
    background: var(--color-surface);
}

.section__eyebrow {
    display: inline-block;
    font-size: 0.825rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.section__header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3rem;
}

.section__header--with-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.section__layout {
    display: grid;
    gap: clamp(2rem, 5vw, 3.5rem);
}

.section__layout--split {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    align-items: center;
}

.section__content > * + * {
    margin-top: 1.25rem;
}

.section__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.feature-list {
    display: grid;
    gap: 0.75rem;
}

.feature-list li {
    position: relative;
    padding-left: 1.75rem;
    color: var(--color-text-muted);
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 50%;
    background: var(--color-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 999px;
    padding: 0.85rem 1.75rem;
    font-weight: 600;
    border: 1px solid transparent;
    transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn--primary:hover,
.btn--primary:focus {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
}

.btn--ghost {
    border-color: currentColor;
    color: var(--color-text);
    background: transparent;
}

.btn--ghost:hover,
.btn--ghost:focus {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.link {
    position: relative;
    font-weight: 600;
    color: var(--color-primary);
}

.link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.2rem;
    width: 100%;
    height: 2px;
    background: currentColor;
    transform-origin: left;
    transform: scaleX(0);
    transition: transform var(--transition);
}

.link:hover::after,
.link:focus::after {
    transform: scaleX(1);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(220, 225, 230, 0.8);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1.1rem 0;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    color: var(--color-text);
}

.logo__mark {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.logo__text {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}

.main-nav {
    position: relative;
}

.main-nav__list {
    display: flex;
    gap: 1.75rem;
    font-weight: 500;
}

.main-nav__list a {
    position: relative;
    transition: color var(--transition);
}

.main-nav__list a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.35rem;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.main-nav__list a:hover::after,
.main-nav__list a:focus::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
}

.nav-toggle__line {
    display: block;
    width: 26px;
    height: 3px;
    margin: 5px 0;
    background: var(--color-text);
    border-radius: 6px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.hero {
    position: relative;
    min-height: clamp(68vh, 85vh, 92vh);
    display: flex;
    align-items: center;
    background: url('../images/hero-banner.jpg') center/cover no-repeat;
    color: #fff;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 35, 50, 0.75), rgba(15, 35, 50, 0.35));
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 640px;
    display: grid;
    gap: 1.5rem;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    line-height: 1.1;
}

.hero p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero__info {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero__stat strong {
    display: block;
    font-size: 1.4rem;
    color: #fff;
}

.section__media img {
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: clamp(1.5rem, 5vw, 2.5rem);
}

.service-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    display: grid;
    grid-template-rows: auto 1fr;
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover,
.service-card:focus-within {
    transform: translateY(-6px);
    box-shadow: 0 30px 60px rgba(17, 27, 39, 0.16);
}

.service-card__media img {
    height: 220px;
    width: 100%;
    object-fit: cover;
}

.service-card__content {
    padding: 1.8rem;
}

.service-card__content h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
}

.service-card__content p {
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.service-card__content ul {
    display: grid;
    gap: 0.6rem;
    color: var(--color-text);
}

.card-grid--projects {
    margin-top: 2.5rem;
}

.project-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
    box-shadow: var(--shadow-soft);
}

.project-card:hover,
.project-card:focus-within {
    transform: translateY(-6px);
    box-shadow: 0 30px 65px rgba(17, 27, 39, 0.18);
}

.project-card img {
    height: 200px;
    width: 100%;
    object-fit: cover;
}

.project-card__body {
    padding: 1.75rem;
    display: grid;
    gap: 0.75rem;
}

.project-card__tag {
    display: inline-block;
    background: rgba(29, 79, 106, 0.12);
    color: var(--color-primary);
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.section__filters {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-button {
    border: 1px solid var(--color-border);
    background: #fff;
    border-radius: 999px;
    padding: 0.55rem 1.25rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.filter-button.is-active,
.filter-button:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-top: 2.5rem;
}

.timeline__item {
    background: #fff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    display: grid;
    gap: 1rem;
}

.timeline__step {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.testimonial-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 2.5rem;
}

.testimonial {
    background: #fff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    display: grid;
    gap: 1.25rem;
}

.testimonial p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.testimonial__meta {
    display: grid;
    gap: 0.2rem;
}

.testimonial__name {
    font-weight: 700;
}

.testimonial__role {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.contact-form {
    margin-top: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
}

.form-field {
    display: grid;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    background: #fff;
    font: inherit;
    transition: border-color 200ms ease, box-shadow 200ms ease;
}

.form-field input:focus,
.form-field textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(29, 79, 106, 0.18);
    outline: none;
}

.form-field input.is-invalid,
.form-field textarea.is-invalid {
    border-color: #dc3545;
}

.form-field input.is-invalid:focus,
.form-field textarea.is-invalid:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.18);
}

.form-field__error {
    font-size: 0.875rem;
    font-weight: 500;
    color: #dc3545;
    min-height: 1.25rem;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 200ms ease, transform 200ms ease;
}

.form-field__error.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.form-field--full {
    grid-column: 1 / -1;
}

.form-success-message {
    padding: 1rem 1.25rem;
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    border-radius: 14px;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 300ms ease, transform 300ms ease;
    display: none;
}

.form-success-message.is-visible {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.contact-info {
    background: #fff;
    border-radius: 24px;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    display: grid;
    gap: 1.75rem;
    box-shadow: var(--shadow-soft);
}

.contact-info__block h3 {
    font-family: var(--font-heading);
    margin-bottom: 0.6rem;
}

.contact-info__block a {
    display: block;
    color: var(--color-primary);
    font-weight: 600;
}

.contact-info__map img {
    border-radius: 16px;
}

.site-footer {
    background: #0f1b27;
    color: rgba(255, 255, 255, 0.85);
    padding: 4rem 0 2rem;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.site-footer__grid p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: 1rem;
}

.site-footer .logo__mark {
    background: rgba(255, 255, 255, 0.12);
}

.footer-list {
    display: grid;
    gap: 0.5rem;
}

.footer-list a {
    color: rgba(255, 255, 255, 0.75);
}

.footer-list a:hover,
.footer-list a:focus {
    color: #fff;
}

.site-footer__bottom {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
    font-size: 0.9rem;
}

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

@media (max-width: 960px) {
    .site-header .container {
        align-items: center;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .main-nav__list {
        position: absolute;
        top: calc(100% + 12px);
        right: 0;
        width: min(280px, 80vw);
        background: #fff;
        border-radius: 18px;
        box-shadow: 0 25px 60px rgba(17, 27, 39, 0.18);
        padding: 1.2rem;
        display: grid;
        gap: 0.75rem;
        transform: scale(0.95);
        transform-origin: top right;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    }

    .main-nav__list.is-open {
        opacity: 1;
        visibility: visible;
        transform: scale(1);
    }

    .cta-header {
        display: none;
    }

    .hero {
        min-height: 80vh;
    }

    .section__header--with-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero__info {
        gap: 1rem;
    }
}

@media (max-width: 640px) {
    .hero__content {
        gap: 1.1rem;
    }

    .hero__info {
        flex-direction: column;
    }

    .section__header {
        text-align: left;
    }

    .site-footer__bottom {
        text-align: left;
    }
}