/* ==========================================================================
   Przystań — Baza: reset, typografia, layout, przyciski, reveal
   ========================================================================== */

/* --- Reset --- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + var(--space-md));
}

body {
    font-family: var(--font-sans);
    font-size: var(--step-0);
    line-height: var(--leading-normal);
    color: var(--text-dark);
    background: var(--surface);
    /* Tło strony to jedna, ciągła warstwa aurory — sekcje leżą na niej
       i różnią się jedynie przezroczystymi welonami. */
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

img,
picture,
svg,
iframe {
    display: block;
    max-width: 100%;
}

img {
    height: auto;
}

input,
button,
select,
textarea {
    font: inherit;
    color: inherit;
}

button {
    background: none;
    border: 0;
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

:target {
    scroll-margin-top: calc(var(--nav-height) + var(--space-md));
}

/* --- Focus: widoczny na każdym tle --- */
:focus-visible {
    outline: 3px solid var(--secondary-700);
    outline-offset: 3px;
    border-radius: 6px;
}

.on-dark :focus-visible,
.lightbox :focus-visible {
    outline-color: var(--accent-color);
}

/* Pominięcie nawigacji dla klawiatury i czytników ekranu */
.skip-link {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    z-index: calc(var(--z-navbar) + 1);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-pill);
    background: var(--dark-color);
    color: var(--text-on-dark);
    font-weight: 600;
    transform: translateY(-160%);
    transition: transform var(--duration-base) var(--ease-out-soft);
}

.skip-link:focus-visible {
    transform: translateY(0);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-gutter);
}

.container--narrow {
    max-width: 860px;
}

.section {
    position: relative;
    padding-block: var(--section-padding);
}

/* --- Typografia --- */
h1,
h2,
h3,
h4 {
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    font-weight: 600;
    text-wrap: balance;
}

p {
    text-wrap: pretty;
}

.section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    margin-bottom: var(--space-sm);
    padding: 0.4rem 1rem 0.4rem 0.6rem;
    border: 1px solid rgba(var(--secondary-rgb), 0.22);
    border-radius: var(--radius-pill);
    background: rgba(var(--white-rgb), 0.6);
    color: var(--secondary-700);
    font-size: var(--step--1);
    font-weight: 600;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
}

.section-eyebrow::before {
    content: "";
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--gradient-brand);
}

.section-title {
    font-size: var(--step-5);
    color: var(--dark-color);
}

.section-title .accent {
    /* Gradientowy akcent na kluczowym słowie — fallback na pełny kolor,
       gdy przeglądarka nie obsługuje background-clip: text. */
    color: var(--primary-700);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
}

@supports (-webkit-background-clip: text) or (background-clip: text) {
    .section-title .accent {
        -webkit-text-fill-color: transparent;
    }
}

.section-subtitle {
    max-width: 62ch;
    margin-top: var(--space-sm);
    color: var(--text-light);
    font-size: var(--step-1);
    line-height: var(--leading-snug);
}

.section-header {
    margin-bottom: clamp(2.5rem, 1.5rem + 3vw, 4.5rem);
}

.section-header--center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

/* --- Powierzchnie --- */
.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
    backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .glass {
        background: var(--glass-bg-strong);
    }
}

/* --- Przyciski --- */
.btn {
    --btn-bg: var(--gradient-warm);
    --btn-fg: var(--white);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2xs);
    min-height: 3.25rem;
    padding: 0.9rem 1.9rem;
    border-radius: var(--radius-pill);
    background: var(--btn-bg);
    color: var(--btn-fg);
    font-size: var(--step-0);
    font-weight: 600;
    letter-spacing: -0.01em;
    white-space: nowrap;
    box-shadow: var(--shadow-md);
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) var(--ease-out-soft),
        background-color var(--duration-base) var(--ease-out-soft);
}

.btn:hover {
    box-shadow: var(--shadow-glow-warm);
}

.btn:active {
    transform: scale(0.97);
}

.btn .icon {
    width: 1.15em;
    height: 1.15em;
    transition: transform var(--duration-base) var(--ease-spring);
}

.btn:hover .icon {
    transform: translateX(3px);
}

.btn--primary {
    /* Ciemniejszy pomarańcz u dołu gradientu zapewnia kontrast AA dla białego tekstu. */
    --btn-bg: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-700) 100%);
}

.btn--secondary {
    --btn-bg: rgba(var(--white-rgb), 0.55);
    --btn-fg: var(--dark-color);
    border: 1px solid rgba(var(--dark-rgb), 0.16);
    box-shadow: var(--shadow-sm);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

.btn--secondary:hover {
    background: rgba(var(--white-rgb), 0.85);
    box-shadow: var(--shadow-md);
}

.btn--ghost {
    --btn-bg: transparent;
    --btn-fg: var(--secondary-700);
    box-shadow: none;
    border: 1px solid rgba(var(--secondary-rgb), 0.3);
}

.btn--ghost:hover {
    --btn-bg: rgba(var(--secondary-rgb), 0.08);
    box-shadow: none;
}

/* --- Ikony (sprite SVG) --- */
.icon {
    width: 1.25rem;
    height: 1.25rem;
    flex: none;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* --- Scroll reveal ---
   Stan początkowy ustawia JS (klasa .js-reveal dodawana tylko gdy skrypt
   działa i ruch jest dozwolony), więc bez JS treść jest od razu widoczna. */
.js-reveal [data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity var(--duration-reveal) var(--ease-out-soft),
        transform var(--duration-reveal) var(--ease-out-soft);
    transition-delay: var(--reveal-delay, 0ms);
}

.js-reveal [data-reveal="scale"] {
    transform: translateY(20px) scale(0.965);
}

.js-reveal [data-reveal="left"] {
    transform: translateX(-32px);
}

.js-reveal [data-reveal="right"] {
    transform: translateX(32px);
}

.js-reveal [data-reveal].is-revealed {
    opacity: 1;
    transform: none;
}

/* --- Wejście strony --- */
body {
    opacity: 1;
}

body.is-loading {
    opacity: 0;
}

body.is-loaded {
    animation: page-fade-in var(--duration-slow) var(--ease-out-soft) both;
}

@keyframes page-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* --- Globalny wariant statyczny ---
   Wyłączamy ruch, ale zostawiamy zmiany koloru/cienia, żeby stany hover
   i focus nadal czytelnie komunikowały interakcję. */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }

    .js-reveal [data-reveal] {
        opacity: 1;
        transform: none;
    }
}