/**
 * Szkoła pływania Maris — arkusz bazowy
 * Rozszerzaj o style stron w osobnych plikach lub na końcu tego pliku.
 */

/* ─── Font ─── */
@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap");

/* ─── Design tokens ─── */
:root {
  --color-primary: #1e3c72;
  --color-primary-mid: #2a5298;
  --color-primary-light: #4a90e2;
  --color-accent: #ffd700;
  --color-accent-hover: #ffe55c;
  --color-accent-warm: #ffa500;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-text-on-dark: #ffffff;
  --color-border-glass: rgba(255, 255, 255, 0.28);
  --color-bg-page: #f4f6fa;
  --color-bg-dark: #1a3360;

  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 9999px;

  --shadow-sm: 0 1px 3px rgba(30, 60, 114, 0.08);
  --shadow-md: 0 4px 12px rgba(30, 60, 114, 0.12);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 24px 60px rgba(17, 44, 87, 0.16);

  --header-height: 4.15rem;
  --z-header: 1030;
  --z-dropdown: 1020;

  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--color-text);
  background-color: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--color-primary);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ─── Layout ─── */
.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-6);
  }
}

/* Główna treść pod sticky headerem */
.site-main {
  flex: 1;
  width: 100%;
  padding-top: var(--space-5);
  padding-bottom: var(--space-16);
  min-height: 40vh;
}

.site-main--home {
  padding-top: 0;
  padding-bottom: 0;
}

/* ─── Przyciski (bazowe, strony mogą rozszerzać) ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-warm));
  color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(255, 215, 0, 0.35);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  color: var(--color-primary);
  box-shadow: 0 6px 18px rgba(255, 215, 0, 0.45);
  transform: translateY(-2px);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-text-on-dark);
  border: 1px solid var(--color-border-glass);
}

.btn--ghost:hover {
  background: rgba(255, 215, 0, 0.2);
  border-color: var(--color-accent);
  color: var(--color-text-on-dark);
}

/* ─── Header ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: linear-gradient(180deg, var(--color-primary) 0%, #172f5c 100%);
  box-shadow: var(--shadow-md);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(var(--space-3), 2.5vw, var(--space-8));
  min-height: var(--header-height);
  padding-block: 0.22rem;
}

.site-header__brand {
  flex-shrink: 0;
  min-width: 0;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text-on-dark);
}

.site-header__logo:hover {
  color: var(--color-accent);
}

.site-header__logo-img {
  width: 88px;
  height: auto;
  max-height: 68px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: none;
}

.site-header__logo-text {
  display: none !important;
}

/* Nawigacja desktop */
.site-nav {
  display: none;
}

@media (min-width: 1100px) {
  .site-nav {
    display: flex;
    flex: 1 1 auto;
    min-width: 0;
    justify-content: stretch;
  }
}

.site-nav__list {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 1100px) {
  .site-nav__list {
    width: 100%;
    justify-content: space-between;
    gap: clamp(0.35rem, 1.1vw, 1.1rem);
  }
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: block;
  padding: 0.55rem 0.7rem;
  font-size: 0.79rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  border-radius: var(--radius-pill);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.site-nav__link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.site-nav__link--active {
  background: rgba(255, 215, 0, 0.18);
  color: var(--color-accent);
}

/* Dropdown */
.site-nav__item--has-sub > .site-nav__link {
  padding-right: var(--space-5);
}

.site-nav__item--has-sub > .site-nav__link::after {
  content: "";
  position: absolute;
  right: var(--space-2);
  top: 50%;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid rgba(255, 255, 255, 0.7);
  transform: translateY(-25%);
  pointer-events: none;
}

.site-nav__sub {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  margin: 0;
  padding: var(--space-2) 0;
  list-style: none;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
}

.site-nav__item--has-sub:hover > .site-nav__sub,
.site-nav__item--has-sub:focus-within > .site-nav__sub {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-nav__sub .site-nav__link {
  color: var(--color-text);
  border-radius: 0;
  padding: var(--space-3) var(--space-4);
}

.site-nav__sub .site-nav__link:hover {
  background: rgba(30, 60, 114, 0.08);
  color: var(--color-primary);
}

/* Przycisk hamburger */
.site-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-on-dark);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.site-nav-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(9, 24, 49, 0.22);
}

.site-nav-toggle__icon {
  width: 22px;
  height: 18px;
  position: relative;
}

.site-nav-toggle__icon span,
.site-nav-toggle__icon::before,
.site-nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav-toggle__icon::before {
  top: 0;
}

.site-nav-toggle__icon span {
  top: 8px;
}

.site-nav-toggle__icon::after {
  bottom: 0;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__icon::before {
  transform: translateY(8px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__icon span {
  opacity: 0;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__icon::after {
  transform: translateY(-8px) rotate(-45deg);
}

@media (min-width: 1100px) {
  .site-nav-toggle {
    display: none;
  }
}

/* Panel mobilny (poza <header>, żeby fixed nie był przycinany przez backdrop-filter nagłówka) */
.site-nav-mobile {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  top: var(--header-height);
  bottom: 0;
  z-index: calc(var(--z-header) - 1);
  box-sizing: border-box;
  padding: var(--space-4);
  padding-bottom: max(var(--space-10), env(safe-area-inset-bottom, 0px));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  background:
    radial-gradient(ellipse 80% 55% at 50% 0%, rgba(42, 82, 152, 0.38), transparent 58%),
    linear-gradient(165deg, #0f1f3d 0%, #1a3360 42%, #1e3c72 72%, #152a52 100%);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-nav-mobile.is-open {
  display: block;
}

@media (min-width: 1100px) {
  .site-nav-mobile {
    display: none !important;
  }
}

.site-nav-mobile__list {
  margin: 0 auto;
  padding: 0;
  max-width: 28rem;
  list-style: none;
}

.site-nav-mobile__item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-nav-mobile__item:first-child .site-nav-mobile__link {
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
}

.site-nav-mobile__link {
  display: block;
  padding: var(--space-4) var(--space-3);
  font-size: 1.02rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.96);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition:
    background 0.18s ease,
    color 0.18s ease,
    transform 0.18s ease;
}

.site-nav-mobile__link:hover,
.site-nav-mobile__link:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-accent);
}

.site-nav-mobile__link--active {
  color: var(--color-accent);
  background: rgba(255, 215, 0, 0.12);
}

.site-nav-mobile__sub {
  margin: 0;
  padding: 0 0 var(--space-3) var(--space-4);
  list-style: none;
}

.site-nav-mobile__sub .site-nav-mobile__link {
  font-size: 0.9375rem;
  padding: var(--space-2) var(--space-2);
  color: rgba(255, 255, 255, 0.85);
}

/* ─── Footer ─── */
.site-footer {
  background: linear-gradient(180deg, var(--color-bg-dark) 0%, #0f1f3d 100%);
  color: rgba(255, 255, 255, 0.88);
  padding-block: var(--space-12) var(--space-8);
  margin-top: auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer__main {
  display: grid;
  gap: var(--space-10);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .site-footer__main {
    grid-template-columns: 1.1fr 1.4fr;
    align-items: start;
  }
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.site-footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-footer__logo-img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.site-footer__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-on-dark);
}

.site-footer__subtitle {
  display: block;
  margin-top: var(--space-1);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  opacity: 0.95;
}

.site-footer__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.78);
  max-width: 36ch;
}

.site-footer__cols {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 600px) {
  .site-footer__cols {
    grid-template-columns: repeat(3, 1fr);
  }
}

.site-footer__col-title {
  margin: 0 0 var(--space-4);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.site-footer__col-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__col-list li {
  margin-bottom: var(--space-2);
}

.site-footer__col-list a {
  font-size: 0.9rem;
}

.site-footer__keywords {
  display: none;
}

.site-footer__keywords-title {
  margin: 0 0 var(--space-4);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.site-footer__tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.85);
}

.site-footer__tag--accent {
  background: rgba(255, 215, 0, 0.15);
  border-color: rgba(255, 215, 0, 0.35);
  color: var(--color-accent);
}

.site-footer__bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}

/* ─── Skip link (dostępność) ─── */
.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 10000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 600;
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* Tymczasowy akapit na stronie startowej (usuń lub zastąp treścią) */
.page-placeholder {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}