/* ==========================================================================
   Air Care Laboratories — Main Stylesheet
   ========================================================================== */

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

:root {
    --color-accent:      #8f6e6e;
    --color-accent-dark: #7a5c5c;
    --color-text:        #1b1b1b;
    --color-text-mid:    #595959;
    --color-text-light:  #8a8a8a;
    --color-bg:          #ffffff;
    --color-bg-light:    #f6f6f6;
    --color-border:      #e2e2e2;
    --font-primary:      'Quicksand', sans-serif;
    --font-secondary:    'Mulish', sans-serif;
    --max-width:         984px;
    --max-width-wide:    1160px;
    --radius:            6px;
    --transition:        0.2s ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-secondary);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-dark); }

h1, h2, h3, h4 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-text);
}

.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;
}

/* ── Layout Utilities ──────────────────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.container--wide { max-width: var(--max-width-wide); }

section { padding-block: 4rem; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
    display: inline-block;
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    letter-spacing: 0.02em;
}

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

.btn--outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.8);
}
.btn--outline:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

/* ── Hero ──────────────────────────────────────────────────────────────────── */
.hero {
    display: grid;
    grid-template-columns: 1fr 739px;
    height: 520px;
    max-width: var(--max-width-wide);
    margin-inline: auto;
}

.hero__left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 3rem 2.5rem;
    background: #fff;
}

.hero__logo {
    width: 413px;
    max-width: 100%;
    height: auto;
    margin-bottom: 2rem;
}

.hero__headline {
    font-family: var(--font-primary);
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 2rem;
    line-height: 1.25;
}

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

.btn--outline-dark {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}
.btn--outline-dark:hover {
    background: var(--color-accent);
    color: #fff;
}

.hero__right {
    height: 100%;
}

.hero__right img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

/* ── Services ──────────────────────────────────────────────────────────────── */
.services { background: var(--color-bg-light); padding-top: 6rem; }

.services__heading {
    text-align: center;
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 0;
    color: var(--color-text);
}

.services__heading::after {
    content: '';
    display: block;
    width: 75%;
    max-width: 16rem;
    height: 2px;
    background: var(--color-accent);
    margin: 0.75rem auto 4rem;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.service-card {
    background: #fff;
    border-radius: calc(var(--radius) * 2);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.09);
}

.service-card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.service-card__body { padding: 1.5rem; }

.service-card__title {
    font-family: var(--font-primary);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--color-accent);
}

.service-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-mid);
    line-height: 1.6;
}

.services__cta {
    text-align: center;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-accent);
    padding: 1rem 1.5rem;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

/* ── About ─────────────────────────────────────────────────────────────────── */
.about { background: var(--color-bg); }

.about__headline {
    font-size: clamp(1.4rem, 3vw, 2rem);
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.about__content {
    font-size: 0.95rem;
    color: var(--color-text-mid);
    line-height: 1.8;
}

.about__content p + p { margin-top: 1rem; }

.about__report-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition);
}
.about__report-link:hover {
    background: var(--color-accent);
    color: #fff;
}

.about__image-wrap {
    border-radius: calc(var(--radius) * 2);
    overflow: hidden;
    margin-bottom: 2rem;
}
.about__image-wrap img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* ── Contact ───────────────────────────────────────────────────────────────── */
.contact { background: var(--color-bg-light); }

.contact__heading {
    font-size: clamp(1.4rem, 3vw, 2rem);
    text-align: center;
    margin-bottom: 2.5rem;
}

.contact__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact__info-block {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact__info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
}

.contact__info-icon {
    flex-shrink: 0;
    width: 20px;
    color: var(--color-accent);
    margin-top: 2px;
}

.contact__info-label {
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-light);
    margin-bottom: 0.2rem;
}

.contact__info-value {
    font-size: 0.95rem;
    color: var(--color-text);
}

.contact__info-value a { color: var(--color-text); }
.contact__info-value a:hover { color: var(--color-accent); }

/* Contact Form */
.contact-form {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: calc(var(--radius) * 2);
    padding: 2rem;
}

.contact-form__title {
    font-family: var(--font-primary);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--color-text);
}

.form-group { margin-bottom: 1rem; }

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--color-text-mid);
}

.form-group input[type="text"],
.form-group input[type="email"] {
    width: 100%;
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-secondary);
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color var(--transition);
    outline: none;
}

.form-group input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(143,110,110,0.12);
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
    cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
    margin-top: 3px;
    accent-color: var(--color-accent);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.form-checkbox span {
    font-size: 0.85rem;
    color: var(--color-text-mid);
    line-height: 1.4;
}

.contact-form .btn { width: 100%; justify-content: center; }

/* Form messages */
.form-notice {
    padding: 0.85rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 600;
}
.form-notice--success { background: #edf7ed; color: #2d6a2d; border: 1px solid #b7ddb7; }
.form-notice--error   { background: #fdf0f0; color: #8b2222; border: 1px solid #e8b4b4; }

/* ── Footer ────────────────────────────────────────────────────────────────── */
.site-footer {
    background: var(--color-text);
    color: rgba(255,255,255,0.75);
    padding-block: 2.5rem;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    text-align: center;
}

.footer-nav {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
}

.footer-nav a {
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    transition: color var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.footer-nav a:hover { color: #fff; }

.footer-copy {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
}

.footer-accreditation {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.4);
    max-width: 600px;
}

/* ── Inner Pages ───────────────────────────────────────────────────────────── */
.page-header {
    background: var(--color-bg-light);
    border-bottom: 1px solid var(--color-border);
    padding-block: 3rem;
    text-align: center;
}

.page-header__title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    color: var(--color-text);
}

.page-content {
    padding-block: 4rem;
}

.page-content .entry-content {
    max-width: 720px;
    margin-inline: auto;
    font-size: 0.97rem;
    color: var(--color-text-mid);
    line-height: 1.8;
}

.entry-content h1,
.entry-content h2,
.entry-content h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.entry-content p { margin-bottom: 1rem; }
.entry-content ul, .entry-content ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.entry-content li { margin-bottom: 0.35rem; }
.entry-content strong { font-weight: 700; color: var(--color-text); }

/* Page sub-nav (Confidentiality / Complaint Resolution) */
.page-subnav {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding-block: 0.75rem;
}

.page-subnav__list {
    display: flex;
    gap: 2rem;
    list-style: none;
    justify-content: center;
}

.page-subnav__list a {
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-mid);
}

.page-subnav__list a:hover,
.page-subnav__list .current a { color: var(--color-accent); }

/* ── 404 ───────────────────────────────────────────────────────────────────── */
.error-404 {
    text-align: center;
    padding-block: 6rem;
}
.error-404 h1 { font-size: 5rem; color: var(--color-accent); margin-bottom: 0.5rem; }
.error-404 p  { color: var(--color-text-mid); margin-bottom: 1.5rem; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .contact__inner { grid-template-columns: 1fr; }

    .hero { grid-template-columns: 1fr; height: auto; }
    .hero__right { height: 260px; }
    .hero__left { padding: 2.5rem 1.5rem; align-items: center; text-align: center; }
    .hero__logo { width: 240px; height: auto; }
    .hero__actions { justify-content: center; }
}

@media (max-width: 480px) {
    section { padding-block: 2.5rem; }
    .services__grid { grid-template-columns: 1fr; }
    .hero__actions { flex-direction: column; align-items: center; }
    .btn { width: 100%; text-align: center; }
}