/* ═══════════════════════════════════════════════════════
   ZKR — main.css  (shared across all pages)
   ═══════════════════════════════════════════════════════ */
:root {
    --primary: #0A5E8C;
    --primary-dark: #083D5A;
    --primary-light: #E8F4FA;
    --accent: #00C2A8;
    --accent-glow: rgba(0, 194, 168, 0.15);
    --dark: #0B1420;
    --dark-secondary: #131E2E;
    --gray-900: #1A2332;
    --gray-700: #3A4A5C;
    --gray-500: #6B7B8D;
    --gray-300: #B0BEC5;
    --gray-100: #ECEFF1;
    --white: #FFFFFF;
    --font-main: 'Plus Jakarta Sans', -apple-system, sans-serif;
    --font-mono: 'Space Mono', monospace;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-card: 0 4px 24px rgba(10, 94, 140, 0.08);
    --shadow-elevated: 0 12px 48px rgba(10, 94, 140, 0.12);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); color: var(--gray-900); background: var(--white); line-height: 1.6; overflow-x: hidden; }

/* ── Navigation ─────────────────────────────────────── */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 0.6rem 0; transition: var(--transition); background: transparent; }
.nav.scrolled { background: rgba(255,255,255,0.97); backdrop-filter: blur(20px); box-shadow: 0 1px 20px rgba(0,0,0,0.06); padding: 0.5rem 0; }
.nav-inner { max-width: 1280px; margin: 0 auto; padding: 0 2rem; display: flex; align-items: center; justify-content: space-between; min-height: 72px; }

.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo-img {
    height: 52px;
    width: auto;
    display: block;
    transition: opacity 0.2s ease;
}
.nav-logo-img:hover { opacity: 0.85; }

.nav-links { display: flex; gap: 0; list-style: none; align-items: center; }
.nav-links > li { position: relative; padding: 0.5rem 1rem; }
.nav-links > li > a { text-decoration: none; font-size: 0.9rem; font-weight: 500; color: rgba(255,255,255,0.85); transition: var(--transition); position: relative; display: flex; align-items: center; gap: 4px; }
.nav.scrolled .nav-links > li > a { color: var(--gray-700); }
.nav-links > li > a:hover { color: var(--accent); }
.nav-links > li > a.active { color: var(--accent); }
.nav.scrolled .nav-links > li > a.active { color: var(--primary); }

.nav-dropdown { position: absolute; top: 100%; left: 0; min-width: 280px; background: var(--white); border-radius: var(--radius-sm); box-shadow: var(--shadow-elevated); padding: 0.8rem 0; opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition); z-index: 100; }
.nav-links > li:hover .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-group { padding: 0.5rem 0; }
.nav-dropdown-group:not(:last-child) { border-bottom: 1px solid var(--gray-100); }
.nav-dropdown-title { display: block; padding: 0.4rem 1.2rem; font-size: 0.75rem; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 0.5px; text-decoration: none; }
.nav-dropdown-title:hover { color: var(--accent); }
.nav-dropdown a { display: block; padding: 0.4rem 1.2rem 0.4rem 1.8rem; font-size: 0.85rem; color: var(--gray-700); text-decoration: none; transition: var(--transition); }
.nav-dropdown a:hover { color: var(--accent); background: var(--primary-light); }

.nav-cta-link > a { padding: 0.55rem 1.4rem !important; background: var(--accent) !important; color: var(--white) !important; border-radius: 50px !important; font-weight: 600 !important; }
.nav-cta-link > a:hover { opacity: 0.9; }

.dropdown-arrow { width: 10px; height: 10px; display: inline-block; transition: var(--transition); }
.nav-links > li:hover .dropdown-arrow { transform: rotate(180deg); }

/* Mobile nav toggle */
.nav-mobile-toggle { display: none; background: none; border: none; cursor: pointer; width: 32px; height: 32px; position: relative; z-index: 1001; }
.nav-mobile-toggle span { position: absolute; left: 4px; width: 24px; height: 2px; background: var(--white); transition: var(--transition); }
.nav.scrolled .nav-mobile-toggle span { background: var(--gray-900); }
.nav-mobile-toggle span:nth-child(1) { top: 8px; }
.nav-mobile-toggle span:nth-child(2) { top: 15px; }
.nav-mobile-toggle span:nth-child(3) { top: 22px; }
.nav-mobile-toggle.active span:nth-child(1) { top: 15px; transform: rotate(45deg); }
.nav-mobile-toggle.active span:nth-child(2) { opacity: 0; }
.nav-mobile-toggle.active span:nth-child(3) { top: 15px; transform: rotate(-45deg); }

/* Mobile menu */
.mobile-menu { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: var(--primary-dark); z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition); padding-top: 70px; }
.mobile-menu.active { opacity: 1; visibility: visible; }
.mobile-menu-scroll { height: 100%; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 1rem 1.5rem 3rem; display: flex; flex-direction: column; gap: 0; }
.mobile-menu-link { display: block; padding: 0.9rem 0; color: rgba(255,255,255,0.85); text-decoration: none; font-size: 1.05rem; font-weight: 600; border-bottom: 1px solid rgba(255,255,255,0.06); transition: var(--transition); }
.mobile-menu-link:hover, .mobile-menu-link.active { color: var(--accent); }
.mobile-accordion { border-bottom: 1px solid rgba(255,255,255,0.06); }
.mobile-accordion-btn { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 0.9rem 0; background: none; border: none; color: rgba(255,255,255,0.85); font-size: 1.05rem; font-weight: 600; font-family: inherit; cursor: pointer; transition: var(--transition); }
.mobile-accordion-btn:hover { color: var(--accent); }
.mobile-accordion-btn svg { transition: transform 0.3s ease; opacity: 0.5; }
.mobile-accordion.open .mobile-accordion-btn svg { transform: rotate(180deg); }
.mobile-accordion.open .mobile-accordion-btn { color: var(--accent); }
.mobile-accordion-body { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.mobile-accordion.open .mobile-accordion-body { max-height: 600px; }
.mobile-cat-link { display: block; padding: 0.6rem 0 0.4rem 0.8rem; color: var(--accent); text-decoration: none; font-size: 0.88rem; font-weight: 700; margin-top: 0.3rem; }
.mobile-sub-link { display: block; padding: 0.45rem 0 0.45rem 1.6rem; color: rgba(255,255,255,0.55); text-decoration: none; font-size: 0.82rem; font-weight: 500; transition: var(--transition); }
.mobile-sub-link:hover { color: var(--accent); padding-left: 1.8rem; }
.mobile-menu-cta { display: block; margin-top: 1rem; padding: 0.9rem 1.5rem; background: var(--accent); color: var(--white); text-decoration: none; text-align: center; border-radius: 50px; font-weight: 700; font-size: 1rem; transition: var(--transition); }
.mobile-menu-cta:hover { background: #00a892; transform: scale(1.02); }

/* ── Buttons ────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 0.85rem 2rem; border-radius: 50px; font-family: var(--font-main); font-size: 0.95rem; font-weight: 600; text-decoration: none; transition: var(--transition); cursor: pointer; border: none; }
.btn-primary { background: var(--accent); color: var(--white); box-shadow: 0 4px 20px rgba(0,194,168,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,194,168,0.4); }
.btn-outline { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.3); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-dark { background: var(--primary); color: var(--white); }
.btn-dark:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-white { background: var(--white); color: var(--primary); }
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-elevated); }
.btn-arrow { width: 16px; height: 16px; }

/* ── Section commons ────────────────────────────────── */
.section { padding: 6rem 2rem; max-width: 1280px; margin: 0 auto; }
.section-header { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.section-label { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 1rem; }
.section-label::before { content: ''; width: 24px; height: 2px; background: var(--accent); }
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; color: var(--gray-900); letter-spacing: -0.5px; line-height: 1.2; margin-bottom: 1rem; }
.section-desc { font-size: 1.05rem; color: var(--gray-500); max-width: 560px; line-height: 1.7; }

/* ── Footer ─────────────────────────────────────────── */
.footer { background: var(--dark); padding: 4rem 2rem 2rem; color: var(--gray-300); }
.footer-inner { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr; gap: 2.5rem; }
.footer-brand p { font-size: 0.88rem; color: var(--gray-500); margin-top: 1rem; max-width: 280px; line-height: 1.6; }
.footer h4 { font-size: 0.85rem; font-weight: 700; color: var(--white); margin-bottom: 1.2rem; letter-spacing: 0.5px; text-transform: uppercase; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }
.footer-links a { color: var(--gray-500); text-decoration: none; font-size: 0.88rem; transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-contact-item { display: flex; gap: 0.5rem; margin-bottom: 0.8rem; font-size: 0.85rem; color: var(--gray-500); line-height: 1.5; }
.footer-contact-item strong { color: var(--gray-300); display: block; margin-bottom: 2px; }
.footer-contact-item a { color: var(--accent); text-decoration: none; }
.footer-bottom { max-width: 1280px; margin: 3rem auto 0; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.06); display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; color: var(--gray-500); }
.footer-bottom-links { display: flex; gap: 1.5rem; }
.footer-bottom-links a { color: var(--gray-500); text-decoration: none; transition: var(--transition); }
.footer-bottom-links a:hover { color: var(--accent); }

/* ── Lang switcher ──────────────────────────────────── */
.lang-switch { display: flex; gap: 0; background: rgba(255,255,255,0.08); border-radius: 6px; overflow: hidden; margin-left: 0.5rem; }
.nav.scrolled .lang-switch { background: var(--gray-100); }
.lang-switch a { padding: 4px 10px !important; font-size: 0.75rem !important; font-weight: 600 !important; color: rgba(255,255,255,0.5) !important; text-decoration: none; transition: var(--transition); }
.nav.scrolled .lang-switch a { color: var(--gray-500) !important; }
.lang-switch a.active { background: var(--accent) !important; color: var(--white) !important; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 1024px) {
    .footer-inner { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-mobile-toggle { display: block; }
    .footer-inner { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}
@media (max-width: 480px) {
    .nav-logo-img { height: 50px; }
    .footer-inner { grid-template-columns: 1fr; }
}