/* ============================================================================
   AIRFLOW — Nasal Strips Template
   Clean Medical / Breathe-Fresh design system
   Highly readable typography, calm blue + mint palette, trust-forward UI
   ============================================================================ */

:root {
    --airflow-primary: #0A7EA4;   /* Breathe blue */
    --airflow-primary-dark: #075E7B;
    --airflow-accent:  #00C2A8;   /* Fresh mint */
    --airflow-accent-dark: #009F8A;
    --airflow-dark:    #0F172A;   /* Headings */
    --airflow-text:    #334155;   /* Body text */
    --airflow-muted:   #64748B;   /* Secondary text */
    --airflow-soft:    #F0F9FF;   /* Section bg */
    --airflow-surface: #FFFFFF;   /* Card surface */
    --airflow-border:  #E2E8F0;   /* Hairline */
    --airflow-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.04);
    --airflow-shadow-md: 0 4px 12px rgba(10, 126, 164, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
    --airflow-shadow-lg: 0 12px 32px rgba(10, 126, 164, 0.12), 0 4px 8px rgba(15, 23, 42, 0.06);
    --airflow-radius: 12px;
    --airflow-radius-lg: 16px;
    --airflow-transition: all 200ms ease;
}

/* ============================================
   BASE TYPOGRAPHY
   ============================================ */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--airflow-text);
    background: var(--airflow-surface);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Manrope', 'Inter', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--airflow-dark);
    letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.75rem); }

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

.text-muted { color: var(--airflow-muted) !important; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0;
    text-transform: none;
    border-radius: 999px;
    padding: 0.7rem 1.5rem;
    transition: var(--airflow-transition);
    border-width: 1.5px;
}

.btn-primary {
    background: var(--airflow-primary);
    border-color: var(--airflow-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(10, 126, 164, 0.25);
}
.btn-primary:hover,
.btn-primary:focus {
    background: var(--airflow-primary-dark);
    border-color: var(--airflow-primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(10, 126, 164, 0.3);
}

.btn-accent,
.btn-success {
    background: var(--airflow-accent);
    border-color: var(--airflow-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 194, 168, 0.25);
}
.btn-accent:hover,
.btn-success:hover {
    background: var(--airflow-accent-dark);
    border-color: var(--airflow-accent-dark);
    color: #fff;
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: var(--airflow-primary);
    border-color: var(--airflow-primary);
    background: transparent;
}
.btn-outline-primary:hover {
    background: var(--airflow-primary);
    border-color: var(--airflow-primary);
    color: #fff;
    transform: translateY(-1px);
}

.btn-lg { padding: 0.9rem 2rem; font-size: 1.05rem; }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.85rem; }

/* ============================================
   HEADER / NAV
   ============================================ */
.site-header {
    background: var(--header-bg, #fff);
    border-bottom: 1px solid var(--airflow-border);
    position: sticky;
    top: 0;
    z-index: 1030;
    backdrop-filter: saturate(180%) blur(8px);
}

.site-header .navbar { padding: 0.75rem 0; }

.navbar-brand {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    color: var(--airflow-dark);
}

.navbar .nav-link {
    font-weight: 500;
    color: var(--airflow-text);
    padding: 0.5rem 1rem !important;
    transition: var(--airflow-transition);
}
.navbar .nav-link:hover,
.navbar .nav-link.active { color: var(--airflow-primary); }

.header-icon {
    color: var(--airflow-dark);
    font-size: 1.25rem;
    transition: var(--airflow-transition);
}
.header-icon:hover { color: var(--airflow-primary); }

/* ============================================
   HERO SLIDER
   ============================================ */
.hero-slider {
    position: relative;
    margin: 1rem 0 2.5rem;
    border-radius: var(--airflow-radius-lg);
    overflow: hidden;
    box-shadow: var(--airflow-shadow-md);
}

.hero-slider .carousel-item {
    position: relative;
    height: 520px;
    background: linear-gradient(135deg, #E0F4FB 0%, #F0F9FF 50%, #E6FBF6 100%);
}

.hero-slider .carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
}

.hero-slider .carousel-caption {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
    padding: 0;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.55) 0%, rgba(15, 23, 42, 0.15) 60%, transparent 100%);
}

.hero-slider .slide-content { max-width: 560px; color: #fff; }

.hero-slider .slide-subtitle {
    display: inline-block;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--airflow-accent);
    background: rgba(0, 194, 168, 0.12);
    padding: 0.4rem 1rem;
    border-radius: 999px;
    margin-bottom: 1rem;
}

.hero-slider .slide-title {
    font-family: 'Manrope', sans-serif;
    font-weight: 800;
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    line-height: 1.1;
    color: #fff;
    margin-bottom: 1rem;
}

.hero-slider .slide-description {
    font-size: 1.1rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: 1.5rem;
}

.hero-slider .carousel-indicators button {
    width: 32px;
    height: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.5);
    border: none;
}
.hero-slider .carousel-indicators .active { background: var(--airflow-accent); }

.hero-slider .carousel-control-prev,
.hero-slider .carousel-control-next {
    width: 56px;
    opacity: 0.85;
}
.hero-slider .carousel-control-prev-icon,
.hero-slider .carousel-control-next-icon {
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    padding: 1.25rem;
    background-size: 45%;
}

@media (max-width: 768px) {
    .hero-slider .carousel-item { height: 380px; }
    .hero-slider .carousel-caption { padding: 0 1.25rem; background: linear-gradient(180deg, rgba(15,23,42,.15) 0%, rgba(15,23,42,.65) 100%); }
    .hero-slider .slide-description { font-size: 0.95rem; }
}

/* ============================================
   SECTION HEADINGS
   ============================================ */
.section-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--airflow-primary);
    margin-bottom: 0.5rem;
}

.section-title {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    color: var(--airflow-dark);
    margin-bottom: 0.75rem;
}

.section-lede {
    color: var(--airflow-muted);
    font-size: 1.05rem;
    max-width: 640px;
}

/* ============================================
   TRUST BAR
   ============================================ */
.trust-bar {
    background: var(--airflow-soft);
    border: 1px solid var(--airflow-border);
    border-radius: var(--airflow-radius);
    padding: 1rem 1.25rem;
    margin-bottom: 3rem;
}

.trust-bar__list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 0.75rem 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.trust-bar__item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--airflow-dark);
}

.trust-bar__item i {
    color: var(--airflow-accent);
    font-size: 1.2rem;
}

/* ============================================
   BENEFITS GRID
   ============================================ */
.benefits-grid { margin-bottom: 3rem; }

.benefit-card {
    background: var(--airflow-surface);
    border: 1px solid var(--airflow-border);
    border-radius: var(--airflow-radius);
    padding: 1.75rem 1.5rem;
    height: 100%;
    text-align: center;
    transition: var(--airflow-transition);
}

.benefit-card:hover {
    transform: translateY(-4px);
    border-color: var(--airflow-accent);
    box-shadow: var(--airflow-shadow-md);
}

.benefit-card__icon {
    width: 56px;
    height: 56px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--airflow-soft);
    color: var(--airflow-primary);
    border-radius: 50%;
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.benefit-card__title {
    font-family: 'Manrope', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--airflow-dark);
    margin-bottom: 0.5rem;
}

.benefit-card__desc {
    font-size: 0.95rem;
    color: var(--airflow-muted);
    margin: 0;
}

/* ============================================
   PRODUCT CARDS
   ============================================ */
.product-card {
    background: var(--airflow-surface);
    border: 1px solid var(--airflow-border);
    border-radius: var(--airflow-radius);
    overflow: hidden;
    transition: var(--airflow-transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: var(--airflow-accent);
    box-shadow: var(--airflow-shadow-md);
}

.product-card__img-wrap {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--airflow-soft);
}

.product-card__img,
.product-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 400ms ease;
}

.product-card:hover .product-card__img,
.product-card:hover img { transform: scale(1.04); }

.product-card__badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--airflow-accent);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
}

.product-card__body {
    padding: 1rem 1.1rem 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.product-card__title,
.product-card h5,
.product-card h6 {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--airflow-dark);
    margin: 0;
    line-height: 1.35;
}

.product-card__title a,
.product-card a { color: inherit; }
.product-card__title a:hover { color: var(--airflow-primary); }

.product-card__price,
.product-card .price {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--airflow-primary);
}

.product-card__price-old,
.product-card .price-old {
    color: var(--airflow-muted);
    text-decoration: line-through;
    font-weight: 500;
    font-size: 0.9rem;
    margin-left: 0.4rem;
}

/* ============================================
   FEATURED / NEW SECTIONS
   ============================================ */
.featured-products,
.new-products { margin-bottom: 3.5rem; }

.featured-products h2,
.new-products h2,
.categories-section h2 {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    color: var(--airflow-dark);
}

/* ============================================
   CATEGORIES / USE CASES
   ============================================ */
.categories-section,
.use-cases { margin-bottom: 3.5rem; }

.category-card {
    position: relative;
    display: block;
    border-radius: var(--airflow-radius);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--airflow-soft);
    transition: var(--airflow-transition);
    box-shadow: var(--airflow-shadow-sm);
}

.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--airflow-shadow-md);
}

.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 400ms ease;
}
.category-card:hover img { transform: scale(1.06); }

.category-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    padding: 1rem 1.25rem;
    background: linear-gradient(180deg, transparent 45%, rgba(15, 23, 42, 0.65) 100%);
}

.category-name {
    font-family: 'Manrope', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
    letter-spacing: 0;
}

/* ============================================
   HOW IT WORKS
   ============================================ */
.how-it-works {
    background: var(--airflow-soft);
    border-radius: var(--airflow-radius-lg);
    padding: 3rem 1.5rem;
    margin-bottom: 3.5rem;
}

.how-it-works__header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.step-card {
    text-align: center;
    padding: 1.5rem 1rem;
}

.step-card__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--airflow-primary);
    color: #fff;
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 12px rgba(10, 126, 164, 0.3);
}

.step-card__title {
    font-family: 'Manrope', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--airflow-dark);
    margin-bottom: 0.5rem;
}

.step-card__desc {
    color: var(--airflow-muted);
    margin: 0;
}

/* ============================================
   FAQ TEASER
   ============================================ */
.faq-teaser { margin-bottom: 3.5rem; }

.faq-teaser .accordion-item {
    border: 1px solid var(--airflow-border);
    border-radius: var(--airflow-radius) !important;
    margin-bottom: 0.75rem;
    overflow: hidden;
    background: var(--airflow-surface);
}

.faq-teaser .accordion-button {
    font-family: 'Manrope', sans-serif;
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--airflow-dark);
    background: var(--airflow-surface);
    padding: 1.1rem 1.25rem;
    box-shadow: none;
}

.faq-teaser .accordion-button:not(.collapsed) {
    color: var(--airflow-primary);
    background: var(--airflow-soft);
}

.faq-teaser .accordion-button:focus {
    box-shadow: 0 0 0 3px rgba(10, 126, 164, 0.15);
    border-color: transparent;
}

.faq-teaser .accordion-body {
    color: var(--airflow-text);
    padding: 0 1.25rem 1.25rem;
}

/* ============================================
   CTA BANNER
   ============================================ */
.cta-banner {
    background: linear-gradient(135deg, var(--airflow-primary) 0%, #0D94C2 55%, var(--airflow-accent) 100%);
    border-radius: var(--airflow-radius-lg);
    padding: 3rem 2rem;
    color: #fff;
    margin-bottom: 3.5rem;
    text-align: center;
    box-shadow: var(--airflow-shadow-lg);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.15), transparent 40%),
                      radial-gradient(circle at 85% 20%, rgba(255,255,255,0.12), transparent 40%);
    pointer-events: none;
}

.cta-banner__content { position: relative; z-index: 1; }

.cta-banner__eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 0.5rem;
}

.cta-banner__title {
    font-family: 'Manrope', sans-serif;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.75rem;
}

.cta-banner__desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.92);
    max-width: 540px;
    margin: 0 auto 1.5rem;
}

.cta-banner .btn-light {
    background: #fff;
    border-color: #fff;
    color: var(--airflow-primary);
    font-weight: 700;
}
.cta-banner .btn-light:hover {
    background: var(--airflow-dark);
    border-color: var(--airflow-dark);
    color: #fff;
    transform: translateY(-1px);
}

/* ============================================
   FEATURES ROW (shipping / returns / etc.)
   ============================================ */
.features-section .p-3.border.rounded,
.features-section .feature-box {
    border: 1px solid var(--airflow-border) !important;
    border-radius: var(--airflow-radius) !important;
    background: var(--airflow-surface);
    padding: 1.5rem 1rem !important;
    transition: var(--airflow-transition);
}

.features-section .p-3.border.rounded:hover {
    border-color: var(--airflow-accent) !important;
    box-shadow: var(--airflow-shadow-sm);
}

.features-section i {
    color: var(--airflow-primary) !important;
}

.features-section h6 {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    color: var(--airflow-dark);
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
    background: transparent;
    padding: 0.75rem 0;
    font-size: 0.9rem;
}
.breadcrumb a { color: var(--airflow-muted); }
.breadcrumb a:hover { color: var(--airflow-primary); }
.breadcrumb-item.active { color: var(--airflow-dark); font-weight: 500; }

/* ============================================
   FORMS
   ============================================ */
.form-control,
.form-select {
    border: 1.5px solid var(--airflow-border);
    border-radius: 10px;
    padding: 0.65rem 0.9rem;
    font-size: 0.95rem;
    color: var(--airflow-dark);
    transition: var(--airflow-transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--airflow-primary);
    box-shadow: 0 0 0 3px rgba(10, 126, 164, 0.12);
}

.form-label {
    font-weight: 500;
    color: var(--airflow-dark);
    font-size: 0.9rem;
    margin-bottom: 0.35rem;
}

/* ============================================
   CARDS (generic)
   ============================================ */
.card {
    border: 1px solid var(--airflow-border);
    border-radius: var(--airflow-radius);
    box-shadow: var(--airflow-shadow-sm);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.45em 0.75em;
    border-radius: 999px;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--footer-bg, var(--airflow-dark));
    color: rgba(255, 255, 255, 0.75);
    padding: 3.5rem 0 1.5rem;
    margin-top: 4rem;
}

.site-footer h5,
.site-footer h6 {
    font-family: 'Manrope', sans-serif;
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.02em;
    margin-bottom: 1rem;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.75);
    transition: var(--airflow-transition);
}
.site-footer a:hover { color: var(--airflow-accent); }

.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.5rem; }

.site-footer .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-top: 2.5rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.55);
}

.site-footer .social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    margin-right: 0.5rem;
}
.site-footer .social-icons a:hover {
    background: var(--airflow-accent);
    color: #fff;
}

/* ============================================
   NEWSLETTER
   ============================================ */
.newsletter-section {
    background: var(--airflow-soft);
    border-radius: var(--airflow-radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    margin-bottom: 3.5rem;
}

.newsletter-section .form-control {
    background: #fff;
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination .page-link {
    color: var(--airflow-primary);
    border: 1px solid var(--airflow-border);
    margin: 0 3px;
    border-radius: 8px !important;
    padding: 0.5rem 0.85rem;
}
.pagination .page-item.active .page-link {
    background: var(--airflow-primary);
    border-color: var(--airflow-primary);
    color: #fff;
}

/* ============================================
   ACCOUNT / SIDEBAR
   ============================================ */
.sidebar-widget {
    background: var(--airflow-surface);
    border: 1px solid var(--airflow-border);
    border-radius: var(--airflow-radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.sidebar-widget h5,
.sidebar-widget h6 {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    color: var(--airflow-dark);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--airflow-border);
}

/* ============================================
   RESPONSIVE TWEAKS
   ============================================ */
@media (max-width: 768px) {
    .hero-slider { margin: 0.5rem 0 2rem; border-radius: var(--airflow-radius); }
    .trust-bar { padding: 0.85rem; }
    .trust-bar__list { justify-content: flex-start; }
    .how-it-works { padding: 2rem 1rem; }
    .cta-banner { padding: 2.25rem 1.25rem; }
    .newsletter-section { padding: 2rem 1rem; }
}

/* ============================================
   UTILS
   ============================================ */
.bg-soft { background: var(--airflow-soft) !important; }
.text-primary-airflow { color: var(--airflow-primary) !important; }
.text-accent-airflow { color: var(--airflow-accent) !important; }
.rounded-airflow { border-radius: var(--airflow-radius) !important; }