/* ============================================================
   common.css — wspólne style dla wszystkich stron serwisu
   (reset, zmienne, typografia bazowa, nawigacja, przyciski,
    stopka, animacje, dostępność)
   ============================================================ */

/* ===================== RESET + TOKENY + BASE ===================== */
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        img, video { max-width: 100%; height: auto; }
        /* Pola formularzy mają własną szerokość domyślną (atrybut size). Bez tego
           rozpychają kolumny siatki na wąskim ekranie i robi się poziomy scroll. */
        input, select, textarea { max-width: 100%; min-width: 0; }
        .form-group input, .form-group select, .form-group textarea { width: 100%; }

        :root {
            --color-bg: #F8FAFB;
            --color-surface: #FFFFFF;
            --color-primary: #3B8BDB;
            --color-primary-hover: #245C97;
            /* Warianty do TEKSTU. Marka zostaje #3B8BDB (ramki, tła, ikony, duże
               nagłówki), ale na małym tekście dawała 3,56:1 — poniżej progu WCAG AA.
               Poniższe przechodzą 4,5:1 i są tym samym odcieniem, tylko głębszym. */
            --color-primary-text: #2B6CB0;
            --color-amber-text: #B45309;
            --color-accent-text: #C2410C;
            --color-primary-light: #E8F4FD;
            --color-secondary: #14B8A6;
            /* --color-secondary-text: ta sama zieleń, ale przyciemniona do kontrastu
               4.5:1 na białym tle. #14B8A6 daje tylko 2,49:1 i nie nadaje się na tekst. */
            --color-secondary-text: #0F766E;
            --color-secondary-light: #F0FAF8;
            --color-text: #1A1A2E;
            --color-text-secondary: #5A5A72;
            --color-text-muted: #6B6B80;
            --color-border: #E5E7EB;
            --color-accent: #E86B4A;
            --color-danger: #EF4444;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --max-width: 1160px;
        }

        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        /* etykieta widoczna tylko dla czytników ekranu */
        /* Atrybut hidden ma wygrywać z display ustawionym w klasach. */
        [hidden] { display: none !important; }

        .sr-only {
            position: absolute; width: 1px; height: 1px;
            overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
        }

/* ===================== NAWIGACJA ===================== */
        .nav {
            position: fixed; top: 0; left: 0; right: 0; z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow 0.3s;
        }
        .nav.scrolled { box-shadow: var(--shadow-sm); }
        .nav-inner {
            max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
            height: 64px; display: flex; align-items: center; justify-content: space-between;
        }
        .nav-logo { display: inline-flex; align-items: center; text-decoration: none; }
        .nav-logo img { display: block; height: 32px; width: auto; }
        .nav-links {
            display: flex; align-items: center; gap: 6px; list-style: none;
        }
        .nav-links a {
            font-size: 14px; font-weight: 500; color: var(--color-text-secondary);
            text-decoration: none; padding: 8px 14px; border-radius: 8px;
            transition: color 0.2s, background 0.2s;
        }
        .nav-links a:hover { color: var(--color-text); background: var(--color-bg); }
        .nav-links a.active { color: var(--color-primary-text); font-weight: 600; }

        /* Rozwijane menu „Usługi”: otwiera się po najechaniu, po wejściu klawiszem Tab
           i po kliknięciu strzałki (dotyk). Na telefonie rozwija się w miejscu, w liście. */
        .nav-item { position: relative; display: flex; align-items: center; }
        .nav-item > a { padding-right: 6px; }
        .nav-sub-toggle {
            display: inline-flex; align-items: center; justify-content: center;
            width: 28px; height: 32px; margin-left: -4px; padding: 0;
            background: none; border: none; border-radius: 8px; cursor: pointer;
            color: var(--color-text-secondary); transition: color 0.2s, background 0.2s;
        }
        .nav-sub-toggle svg { transition: transform 0.2s; }
        .nav-sub-toggle:hover { color: var(--color-text); background: var(--color-bg); }
        .nav-item.open .nav-sub-toggle svg { transform: rotate(180deg); }
        .nav-menu {
            position: absolute; top: calc(100% + 14px); left: -12px; width: 600px;
            background: var(--color-surface); border-radius: var(--radius-lg);
            box-shadow: 0 18px 48px rgba(26,26,46,0.16);
            opacity: 0; visibility: hidden; transform: translateY(6px);
            transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
        }
        /* Niewidoczny mostek, żeby kursor nie gubił menu w szczelinie pod paskiem. */
        .nav-menu::before { content: ''; position: absolute; left: 0; right: 0; top: -16px; height: 16px; }
        .nav-item:hover .nav-menu, .nav-item:focus-within .nav-menu, .nav-item.open .nav-menu {
            opacity: 1; visibility: visible; transform: none;
        }
        .nav-item.dismissed .nav-menu { opacity: 0; visibility: hidden; transform: translateY(6px); }
        .nav-menu-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 20px 20px 12px; }
        .nav-menu-head { font-size: 14px; font-weight: 600; color: var(--color-text-muted); padding: 0 12px 8px; }
        .nav-links .nav-menu a {
            display: block; padding: 10px 12px; border-radius: var(--radius);
            font-size: 16px; font-weight: 600; color: var(--color-text);
        }
        .nav-links .nav-menu a span { display: block; margin-top: 2px; font-size: 14px; font-weight: 400; color: var(--color-text-secondary); line-height: 1.45; }
        .nav-links .nav-menu a:hover { background: var(--color-primary-light); color: var(--color-primary-text); }
        .nav-links .nav-menu a[aria-current="page"] { color: var(--color-primary-text); }
        .nav-menu-foot {
            display: flex; align-items: center; justify-content: space-between; gap: 16px;
            padding: 14px 32px; background: var(--color-bg);
            border-radius: 0 0 var(--radius-lg) var(--radius-lg); font-size: 14px; color: var(--color-text-secondary);
        }
        .nav-links .nav-menu-foot a { display: inline; padding: 0; font-size: 14px; color: var(--color-primary-text); background: none; }
        .nav-links .nav-menu-foot a:hover { background: none; text-decoration: underline; }
        @media (prefers-reduced-motion: reduce) {
            .nav-menu, .nav-sub-toggle svg { transition: none; }
        }

        .nav-right { display: flex; align-items: center; gap: 16px; }
        .nav-cta {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 10px 22px; background: var(--color-primary-text); color: #fff;
            border-radius: 10px; text-decoration: none; font-weight: 600; font-size: 14px;
            transition: background 0.2s, transform 0.15s;
        }
        .nav-cta:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
        .nav-hamburger {
            display: none; background: none; border: none; cursor: pointer;
            padding: 8px; color: var(--color-text); border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-hamburger:hover { background: var(--color-bg); }
        /* Sześć pozycji menu i przycisk mieszczą się w jednej linii dopiero od ok. 1080 px. */
        @media (max-width: 1080px) {
            .nav-links {
                display: none; position: absolute; top: 64px; left: 0; right: 0;
                /* Pełne tło: rozmycie nie działa wewnątrz paska, który sam jest rozmyty. */
                background: var(--color-surface);
                flex-direction: column; padding: 16px 24px; gap: 4px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-md);
            }
            .nav-links.open { display: flex; max-height: calc(100vh - 64px); overflow-y: auto; }
            .nav-links a { padding: 12px 16px; width: 100%; border-radius: 10px; }
            .nav-links a:hover { background: var(--color-primary-light); }
            /* Menu „Usługi” w liście: link prowadzi na stronę usług, strzałka rozwija podmenu. */
            .nav-item { flex-wrap: wrap; width: 100%; }
            .nav-item > a { width: auto; flex: 1; }
            .nav-sub-toggle { width: 48px; height: 44px; margin: 0; }
            .nav-menu, .nav-item:hover .nav-menu, .nav-item:focus-within .nav-menu {
                position: static; width: 100%; display: none; box-shadow: none; background: none;
                opacity: 1; visibility: visible; transform: none; transition: none;
            }
            .nav-item.open .nav-menu { display: block; }
            .nav-menu::before { display: none; }
            .nav-menu-cols { grid-template-columns: 1fr; gap: 4px; padding: 4px 0 8px 16px; }
            .nav-menu-head { padding: 10px 16px 4px; }
            .nav-links .nav-menu a { padding: 10px 16px; }
            .nav-links .nav-menu a span { display: none; }
            .nav-menu-foot { flex-direction: column; align-items: flex-start; gap: 10px; margin: 0 0 8px 16px; padding: 14px 16px; border-radius: var(--radius); }
            .nav-links .nav-menu-foot a { padding: 0; width: auto; }
            .nav-hamburger { display: block; }
            .nav-cta span { display: none; }
            .nav-cta { padding: 10px 14px; }
        }

/* ===================== PRZYCISKI ===================== */
        .btn-primary { display: inline-flex; align-items: center; gap: 10px; padding: 16px 32px; background: var(--color-primary-text); color: #fff; border: none; border-radius: var(--radius); font-size: 16px; font-weight: 600; cursor: pointer; text-decoration: none; transition: background 0.2s, transform 0.15s, box-shadow 0.2s; }
        .btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-2px); }
        .btn-outline { display: inline-flex; align-items: center; gap: 10px; padding: 14px 28px; background: transparent; color: var(--color-primary-text); border: 2px solid var(--color-primary); border-radius: var(--radius); font-size: 16px; font-weight: 600; cursor: pointer; text-decoration: none; transition: background 0.2s, transform 0.15s; }
        .btn-outline:hover { background: var(--color-primary-light); transform: translateY(-2px); }

/* ===================== FORMULARZE ===================== */
        /* Jedna linijka obok formularza dla tych, którym ta usługa nie pasuje. */
        .form-aside-link { margin-top: 16px; font-size: 16px; line-height: 1.6; }
        .form-aside-link a { color: var(--color-primary-text); font-weight: 600; text-decoration: none; white-space: nowrap; }
        .form-aside-link a:hover { text-decoration: underline; }

/* ===================== STOPKA ===================== */
        /* Stopka jest mapą serwisu: każda usługa i każdy materiał ma tu stały link,
           więc strony ofertowe dostają linki wewnętrzne z każdej podstrony. */
        .footer { padding: 72px 24px 40px; background: var(--color-surface); }
        .footer-inner { max-width: var(--max-width); margin: 0 auto; }
        .footer-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; margin-bottom: 56px; }
        .footer-col { display: flex; flex-direction: column; align-items: flex-start; }
        .footer-head { font-size: 16px; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }
        .footer-col a { font-size: 16px; color: var(--color-text-secondary); text-decoration: none; padding: 6px 0; transition: color 0.2s; }
        .footer-col a:hover { color: var(--color-primary-text); }
        .footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
        .footer-bottom p { font-size: 14px; color: var(--color-text-muted); }
        .footer-made { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--color-text-secondary); }
        @media (max-width: 760px) {
            .footer { padding: 56px 20px 32px; }
            .footer-cols { grid-template-columns: 1fr 1fr; gap: 32px 24px; margin-bottom: 40px; }
            .footer-col:last-child { grid-column: 1 / -1; }
            .footer-col a { padding: 9px 0; }
        }

/* ===================== ANIMACJE ===================== */
        .fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===================== DOSTĘPNOŚĆ ===================== */
        :focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: 4px; }
        .nav-cta:focus-visible, .btn-primary:focus-visible, .btn-outline:focus-visible { outline-offset: 4px; box-shadow: 0 0 0 4px rgba(59,139,219,0.2); }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
            html { scroll-behavior: auto; }
            .fade-up { opacity: 1; transform: none; }
        }

/* ===================== KOMUNIKATY FORMULARZY ===================== */
        .form-msg { margin-top: 18px; padding: 16px 18px; border-radius: var(--radius); display: flex; flex-direction: column; gap: 5px; font-size: 14px; line-height: 1.6; }
        .form-msg:focus { outline: none; }
        .form-msg strong { font-size: 16px; font-weight: 700; }
        .form-msg span { color: inherit; opacity: .88; }
        .form-msg a { color: inherit; font-weight: 700; }
        .form-msg--ok { background: var(--color-secondary-light); border: 1px solid var(--color-secondary); color: #0F766E; }
        .form-msg--err { background: #FEF2F2; border: 1px solid #FCA5A5; color: #991B1B; }