/* ============================================================
   SmartCoders LLC — smartcoders.net
   Single stylesheet. Design tokens up top; sections follow
   document order: base, header, hero, sections, cards,
   contact, footer, utilities, responsive.
   ============================================================ */

:root {
    /* Color */
    --color-bg:           #FAFAF8;
    --color-surface:      #FFFFFF;
    --color-text:         #1A1A1A;
    --color-text-muted:   #5C6157;
    --color-accent:       #4A7C1E;
    --color-accent-hover: #3D6618;
    --color-accent-soft:  #EDF5E3;
    --color-accent-raw:   #8dc63f; /* decorative only — never text */
    --color-border:       #E5E6E1;
    --color-footer-bg:    #14150F;

    /* Type */
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-heading: "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --text-xs:   0.8125rem;
    --text-sm:   0.9375rem;
    --text-base: 1.0625rem;
    --text-lg:   clamp(1.125rem, 1rem + 0.5vw, 1.3125rem);
    --text-xl:   clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);
    --text-2xl:  clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem);
    --text-hero: clamp(2.25rem, 1.6rem + 3.2vw, 4rem);

    /* Layout */
    --container: 72rem;
    --space-section: clamp(5rem, 4rem + 6vw, 8.5rem);
    --radius: 10px;
    --radius-btn: 8px;
    --shadow-card: 0 1px 2px rgba(20, 21, 15, 0.04), 0 8px 24px rgba(20, 21, 15, 0.06);
    --header-height: 4.5rem;
}

/* ---------- Base ---------- */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    line-height: 1.25;
    margin: 0 0 1rem;
    letter-spacing: -0.01em;
}

h1 { font-size: var(--text-hero); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: var(--text-2xl); font-weight: 700; }
h3 { font-size: var(--text-xl); font-weight: 600; }

p { margin: 0 0 1.25rem; }

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover { color: var(--color-accent-hover); }

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

ul { margin: 0; padding: 0; list-style: none; }

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 2px;
}

.container {
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.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;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 200;
    padding: 0.75rem 1.25rem;
    background: var(--color-text);
    color: #fff;
    border-radius: 0 0 var(--radius-btn) var(--radius-btn);
    font-weight: 600;
}

.skip-link:focus-visible {
    top: 0;
    color: #fff;
}

.eyebrow {
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.lead {
    font-size: var(--text-lg);
    color: var(--color-text);
    font-weight: 500;
}

/* ---------- Buttons ---------- */

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-btn);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.2;
    border: 1px solid transparent;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

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

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

.btn--ghost:hover {
    color: var(--color-accent-hover);
    border-color: var(--color-accent);
}

.btn--small {
    padding: 0.5rem 1.125rem;
}

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    min-height: var(--header-height);
}

.wordmark {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.wordmark span { color: var(--color-accent); }

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

.site-nav ul {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.site-nav a:not(.btn) {
    color: var(--color-text);
    font-size: var(--text-sm);
    font-weight: 500;
}

.site-nav a:not(.btn):hover { color: var(--color-accent); }

.nav-toggle {
    display: none;
    position: relative;
    width: 2.75rem;
    height: 2.75rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
    position: absolute;
    left: 50%;
    width: 1.5rem;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
    content: "";
}

.nav-toggle__bar {
    top: 50%;
    transform: translate(-50%, -50%);
}

.nav-toggle__bar::before { transform: translate(-50%, -7px); }
.nav-toggle__bar::after  { transform: translate(-50%, 5px); }

.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { transform: translate(-50%, -1px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after  { transform: translate(-50%, -1px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
    padding-block: calc(var(--space-section) * 1.25) var(--space-section);
    text-align: left;
}

.hero h1 {
    max-width: 56rem;
    margin-bottom: 1.5rem;
}

.hero__lead {
    max-width: 38rem;
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
}

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

.accent-underline {
    background-image: linear-gradient(var(--color-accent-raw), var(--color-accent-raw));
    background-repeat: no-repeat;
    background-size: 100% 0.18em;
    background-position: 0 92%;
}

/* ---------- Sections ---------- */

.section {
    padding-block: var(--space-section);
}

.section--alt {
    background: var(--color-surface);
    border-block: 1px solid var(--color-border);
}

.section__grid {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 3rem;
}

.section__heading h2 { margin-bottom: 0; }

.section__heading--center {
    max-width: 46rem;
    margin-inline: auto;
    text-align: center;
    margin-bottom: 3.5rem;
}

.section__heading--center h2 { margin-bottom: 1.25rem; }

.section__body .lead { margin-bottom: 1.5rem; }

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    margin-top: 2rem;
}

.chips li {
    padding: 0.375rem 0.875rem;
    background: var(--color-accent-soft);
    color: var(--color-accent-hover);
    border-radius: 999px;
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* ---------- Services cards ---------- */

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 56rem;
    margin-inline: auto;
}

@media (max-width: 640px) {
    .services-grid { grid-template-columns: 1fr; }
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

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

.card__icon {
    width: 2rem;
    height: 2rem;
    color: var(--color-accent);
    margin-bottom: 1.25rem;
}

.card h3 {
    font-size: 1.1875rem;
    margin-bottom: 0.75rem;
}

.card p {
    margin: 0;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ---------- Contact ---------- */

.contact__links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.contact__email {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-text);
}

.contact__email:hover { color: var(--color-accent); }

.contact__phone {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
}

/* ---------- Social ---------- */

.social {
    display: flex;
    gap: 1.5rem;
}

.social--center { justify-content: center; }

.social a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: 500;
}

.social a:hover { color: var(--color-accent); }

.social svg {
    width: 1.125rem;
    height: 1.125rem;
    flex-shrink: 0;
}

/* ---------- Footer ---------- */

.site-footer {
    background: var(--color-footer-bg);
    color: rgba(255, 255, 255, 0.7);
    padding-block: 4rem 2.5rem;
    text-align: center;
}

.site-footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.site-footer__logo {
    width: 180px;
    height: auto;
}

.site-footer__tagline {
    margin: 0;
    font-size: var(--text-sm);
}

.site-footer .social a { color: rgba(255, 255, 255, 0.7); }
.site-footer .social a:hover { color: var(--color-accent-raw); }

.site-footer__copyright {
    margin: 1rem 0 0;
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.45);
}

/* ---------- Scroll reveal ---------- */

@media (prefers-reduced-motion: no-preference) {
    [data-reveal] {
        opacity: 0;
        transform: translateY(1.25rem);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    [data-reveal].in-view {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
    .section__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 760px) {
    .nav-toggle { display: block; }

    .site-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        display: none;
    }

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

    .site-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0.75rem 1.5rem 1.25rem;
    }

    .site-nav ul li a:not(.btn) {
        display: block;
        padding: 0.875rem 0;
        font-size: var(--text-base);
    }

    .site-nav__cta { margin-top: 0.75rem; }

    .site-nav__cta .btn { display: block; text-align: center; }
}