/* ============================================
   SHARED STYLES — PureAirGA
   Used by service sub-pages. index.html has its own inline styles.
   ============================================ */

:root {
    --teal-50: #eef8fc;
    --teal-100: #ceeef7;
    --teal-200: #9adcef;
    --teal-300: #5cc5e2;
    --teal-400: #2eadd4;
    --teal-500: #1493be;
    --teal-600: #0e7a9f;
    --teal-700: #106380;
    --teal-800: #124f66;
    --teal-900: #124256;

    --gradient-primary: linear-gradient(135deg, #0e7a9f 0%, #0c92b8 40%, #14a8cc 60%, #22c0e0 100%);

    --white: #ffffff;
    --gray-50: #f8fafb;
    --gray-100: #f1f4f6;
    --gray-200: #e2e7eb;
    --gray-300: #c9d1d8;
    --gray-400: #8d9aaa;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.08);
    --shadow-teal: 0 8px 32px rgba(14, 122, 159, 0.22);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'DM Sans', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background: var(--white);
}

a { text-decoration: none; color: inherit; transition: color 0.25s ease; }

h1, h2, h3, h4, h5, h6 {
    font-family: 'Sora', sans-serif;
    color: var(--gray-900);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.section-label {
    font-family: 'Sora', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--teal-600);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.section-label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'Sora', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn--primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-teal);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 48px rgba(14, 122, 159, 0.28);
}

.btn--large { padding: 18px 40px; font-size: 1rem; }

/* ============================================
   NAV (scrolled state — sub-pages always scrolled)
   ============================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
}

.nav__logo-img {
    height: 36px;
    width: auto;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav__links > li > a {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
}

.nav__links > li > a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: width 0.3s ease;
}

.nav__links > li > a:hover { color: var(--teal-600); }
.nav__links > li > a:hover::after { width: 100%; }

/* Dropdown */
.nav__dropdown { position: relative; }

.nav__dropdown-trigger {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav__dropdown-trigger svg {
    transition: transform 0.25s ease;
}

.nav__dropdown:hover .nav__dropdown-trigger svg {
    transform: rotate(180deg);
}

.nav__dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: -16px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    min-width: 260px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
}

.nav__dropdown:hover .nav__dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav__dropdown-menu::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 0;
    right: 0;
    height: 12px;
}

.nav__dropdown-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: all 0.2s ease;
}

.nav__dropdown-menu a:hover {
    background: var(--teal-50);
    color: var(--teal-700);
    padding-left: 24px;
}

.nav__actions { display: flex; align-items: center; gap: 16px; }

.nav__phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Sora', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--gray-800);
}

.nav__phone svg { color: var(--teal-600); }

/* ============================================
   PAGE HERO (sub-pages)
   ============================================ */
.page-hero {
    padding: 160px 0 80px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.page-hero__title {
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.page-hero__subtitle {
    font-size: 1.15rem;
    color: var(--gray-500);
    max-width: 640px;
    line-height: 1.75;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 80px 0 40px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 64px;
}

.footer__brand-name {
    font-family: 'Sora', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer__brand-name span { color: var(--teal-400); }

.footer__brand-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer__heading {
    font-family: 'Sora', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.footer__links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer__links a {
    font-size: 0.9rem;
    color: var(--gray-400);
    transition: color 0.25s ease;
}

.footer__links a:hover { color: var(--teal-400); }

.footer__bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.8rem;
}

.footer__bottom-links { display: flex; gap: 24px; }
.footer__bottom-links a:hover { color: var(--teal-400); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav__links, .nav__actions .btn { display: none; }
    .footer__grid { grid-template-columns: 1fr; }
    .footer__bottom { flex-direction: column; text-align: center; }
    .page-hero { padding: 120px 0 60px; }
    .page-hero__title { font-size: 2rem; }
}