/* ==========================================================
   pressotherapy.co.uk - Shared Styles
   Used across all pages for consistent design language.
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --teal: #0B7A75;
    --teal-dark: #065956;
    --teal-light: #E0F5F0;
    --teal-50: #F0FAF9;
    --coral: #FF6154;
    --coral-dark: #E5493D;
    --coral-light: #FFF1F0;
    --navy: #0F1B2D;
    --navy-80: #2A3647;
    --bg: #F5F7FA;
    --white: #FFFFFF;
    --grey-50: #F8FAFB;
    --grey-100: #F0F2F5;
    --grey-200: #E1E5EA;
    --grey-300: #C8CDD4;
    --grey-400: #9BA3AF;
    --grey-500: #6B7280;
    --grey-600: #4B5563;
    --gold: #F59E0B;
    --gold-bg: #FFFBEB;
    --green: #10B981;
    --green-bg: #ECFDF5;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(15,27,45,0.06);
    --shadow-md: 0 4px 16px rgba(15,27,45,0.08);
    --shadow-lg: 0 8px 32px rgba(15,27,45,0.12);
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--navy);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--teal);
    color: white;
    padding: 0.5rem 1rem;
    z-index: 200;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { top: 0; }

/* ========== NAVIGATION ========== */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--grey-200);
    padding: 0 2rem;
}
.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--navy);
}
.nav-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--teal);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.nav-logo-icon svg { width: 20px; height: 20px; }
.nav-logo-text { font-weight: 700; font-size: 1.125rem; }
.nav-logo-text span { color: var(--teal); }
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}
.nav-links a {
    text-decoration: none;
    color: var(--grey-600);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.nav-links a:hover { color: var(--navy); background: var(--grey-50); }
.nav-cta {
    background: var(--coral) !important;
    color: white !important;
    padding: 0.5rem 1.25rem !important;
    font-weight: 600 !important;
}
.nav-cta:hover { background: var(--coral-dark) !important; }
.nav-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--navy);
}
.nav-hamburger svg { width: 24px; height: 24px; }
.nav-mobile {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--grey-200);
    padding: 1rem 2rem 1.5rem;
    z-index: 99;
    box-shadow: var(--shadow-lg);
}
.nav-mobile.active { display: block; }
.nav-mobile a {
    display: block;
    padding: 0.75rem 0;
    text-decoration: none;
    color: var(--grey-600);
    font-size: 1rem;
    font-weight: 500;
    border-bottom: 1px solid var(--grey-100);
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile .nav-mobile-cta {
    display: block;
    text-align: center;
    margin-top: 1rem;
    background: var(--coral);
    color: white;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary { background: var(--coral); color: white; }
.btn-primary:hover {
    background: var(--coral-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(255,97,84,0.3);
}
.btn-secondary {
    background: var(--teal);
    color: white;
}
.btn-secondary:hover {
    background: var(--teal-dark);
    transform: translateY(-1px);
}
.btn-outline {
    background: white;
    color: var(--teal);
    border: 1px solid var(--grey-200);
}
.btn-outline:hover {
    border-color: var(--teal);
    background: var(--teal-50);
}
.btn-arrow { font-size: 1.1rem; }

/* ========== SECTIONS ========== */
.section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 2rem;
}
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--teal);
    margin-bottom: 0.75rem;
}
.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}
.section-subtitle {
    font-size: 1.0625rem;
    color: var(--grey-500);
    max-width: 560px;
    line-height: 1.6;
}

/* ========== FOOTER ========== */
.footer {
    background: var(--navy);
    color: white;
    padding: 4rem 2rem 2rem;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}
.footer-brand p {
    color: var(--grey-400);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-top: 0.75rem;
    max-width: 280px;
}
.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--grey-400);
    margin-bottom: 1rem;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a {
    color: var(--grey-400);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}
.footer-col a:hover { color: white; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer-bottom p { color: var(--grey-500); font-size: 0.8rem; }
.footer-affiliate {
    color: var(--grey-500);
    font-size: 0.75rem;
    max-width: 500px;
    line-height: 1.5;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-hamburger { display: block; }
}
@media (max-width: 640px) {
    .section { padding: 3rem 1.5rem; }
    .section-title { font-size: 1.75rem; }
    .footer-grid { grid-template-columns: 1fr; }
}