:root {
    --color-primary: #ff6f00;
    --color-primary-dark: #e85f00;
    --color-secondary: #00a6a6;
    --color-dark: #1f2933;
    --color-text: #334155;
    --color-muted: #64748b;
    --color-border: #e5e7eb;
    --color-background: #f8fafc;
    --color-surface: #ffffff;

    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.12);

    --radius-sm: 8px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --container-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--color-text);
    background: var(--color-background);
    line-height: 1.6;
}

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

img {
    max-width: 100%;
}

ul {
    margin: 0;
    padding-left: 1.2rem;
}

header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
}

header nav {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.brand img {
    display: block;
    width: auto;
    height: 72px;
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-left: auto;
}

.nav-links a {
    font-weight: 700;
    color: var(--color-dark);
}

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

main section,
footer#contact {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 88px 24px;
}

#home {
    padding-top: 104px;
    padding-bottom: 72px;
}

.home-content {
    display: grid;
    gap: 24px;
    width: min(100%, 920px);
}

.eyebrow {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0;
}

#home h1 {
    margin: 0;
    max-width: 900px;
    font-size: clamp(3rem, 7vw, 5.2rem);
    line-height: 1.02;
    color: var(--color-dark);
}

.lead {
    max-width: 760px;
    margin: 0;
    font-size: 1.18rem;
}

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

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 20px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-weight: 800;
    line-height: 1.2;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--color-primary);
    color: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.button-primary:hover,
.button-primary:focus-visible {
    background: var(--color-primary-dark);
}

.button-secondary {
    background: transparent;
    color: var(--color-dark);
    border-color: var(--color-border);
}

.button-secondary:hover,
.button-secondary:focus-visible {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.hero-focus-list {
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.hero-focus-list li {
    padding: 16px 18px;
    border-left: 4px solid var(--color-primary);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

h2 {
    margin: 0;
    font-size: clamp(2.1rem, 4vw, 3.2rem);
    line-height: 1.1;
    color: var(--color-dark);
}

h3 {
    margin: 0 0 12px;
    color: var(--color-dark);
    font-size: 1.35rem;
    line-height: 1.25;
}

h4 {
    margin: 0 0 10px;
    color: var(--color-primary);
    font-size: 1rem;
}

.section-heading {
    grid-column: 1 / -1;
    display: grid;
    gap: 14px;
    max-width: 760px;
}

.section-heading p,
.project-summary,
.cta-note,
.contact-copy p,
.faq-list p,
.project-details p,
article p {
    margin: 0;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

article,
.cta-panel,
.faq-list details {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

article {
    padding: 28px;
}

article:hover,
.cta-panel:hover,
.contact-details li:hover {
    box-shadow: var(--shadow-md);
}

#benefits article:nth-of-type(1),
#services article:nth-of-type(1),
#process article:nth-of-type(1) {
    border-top: 4px solid var(--color-primary);
}

#benefits article:nth-of-type(2),
#services article:nth-of-type(2),
#process article:nth-of-type(2) {
    border-top: 4px solid var(--color-secondary);
}

#benefits article:nth-of-type(3),
#services article:nth-of-type(3),
#process article:nth-of-type(3) {
    border-top: 4px solid var(--color-primary);
}

#benefits article:nth-of-type(4),
#services article:nth-of-type(4),
#process article:nth-of-type(4) {
    border-top: 4px solid var(--color-secondary);
}

.process-grid .step-index {
    margin: 0 0 14px;
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--color-secondary);
}

#portfolio,
#faq {
    display: grid;
    gap: 24px;
}

.portfolio-list {
    display: grid;
    gap: 24px;
}

.project-card {
    padding: 32px;
}

.project-header {
    display: grid;
    gap: 12px;
    margin-bottom: 24px;
}

.project-details {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 22px;
}

.project-details div {
    padding: 18px;
    background: var(--color-background);
    border-radius: var(--radius-sm);
}

.project-card ul {
    display: grid;
    gap: 10px;
}

#cta .cta-panel {
    padding: 36px;
    display: grid;
    gap: 18px;
    background: linear-gradient(135deg, rgba(255, 111, 0, 0.08), rgba(0, 166, 166, 0.08)), var(--color-surface);
}

.cta-note {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.faq-list {
    display: grid;
    gap: 16px;
}

.faq-list details {
    padding: 22px 24px;
}

.faq-list summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--color-dark);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 16px;
}

.faq-list summary::-webkit-details-marker {
    display: none;
}

.faq-list summary::after {
    content: "+";
    margin-left: auto;
    color: var(--color-primary);
    font-size: 1.5rem;
    line-height: 1;
}

.faq-list details[open] summary::after {
    content: "-";
}

.faq-list details p {
    margin-top: 14px;
}

footer#contact {
    padding-top: 72px;
    padding-bottom: 72px;
}

.contact-layout {
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
}

.contact-copy {
    display: grid;
    gap: 20px;
    padding: 36px;
    background: linear-gradient(135deg, rgba(255, 111, 0, 0.08), rgba(0, 166, 166, 0.08)), var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.contact-button {
    width: fit-content;
    margin: 0 auto;
}

.contact-details {
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.contact-details li {
    display: grid;
    gap: 4px;
    padding: 18px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    text-align: left;
}

.contact-details span {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--color-muted);
}

.contact-details a,
.contact-details strong {
    color: var(--color-dark);
}

.footer-note {
    margin: 28px 0 0;
    text-align: center;
    color: var(--color-muted);
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .card-grid,
    .project-details,
    .hero-focus-list {
        grid-template-columns: 1fr;
    }

    .contact-details {
        grid-template-columns: 1fr;
    }

    header nav {
        justify-content: center;
        gap: 16px;
    }

    .nav-links {
        width: 100%;
        margin-left: 0;
    }

    #home h1,
    .home-content,
    .section-heading {
        max-width: none;
    }
}

@media (max-width: 600px) {
    main section,
    footer#contact {
        padding: 56px 18px;
    }

    #home {
        padding-top: 72px;
        padding-bottom: 56px;
    }

    .brand img {
        height: 64px;
    }

    .cta-row {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .contact-copy {
        padding: 24px;
        text-align: left;
    }

    .contact-button {
        width: 100%;
        margin: 0;
    }

    article,
    .cta-panel,
    .faq-list details {
        padding: 22px;
    }

    .project-card {
        padding: 24px;
    }
}