/*
  Šilas — lg4-silas
  Konvencija: utility klasės (u-*) + semantiniai "silas-*" komponentų vardai.
  Jokių bendrinių vardų (hero/container/card/section/grid/btn...).
*/

/* ---------- Tokenai ---------- */
:root {
  /* Paletė — matrica, ašis 2, stulpelis 4 */
  --c-popierius: #F1F4EA;
  --c-salavijas: #C9D3C0;
  --c-samana: #22301F;
  --c-uoga: #7A3352;
  --c-riba: #9DAE92;

  /* Vaidmenys */
  --bg-page: var(--c-popierius);
  --fg-page: var(--c-samana);
  --bg-surface: var(--c-salavijas);
  --accent: var(--c-uoga);
  --line: var(--c-riba);

  /* Tipografija */
  --font-head: "Fraunces", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "Karla", "Segoe UI", system-ui, sans-serif;

  /* Skalė 1.414, bazė 17px */
  --step--1: 0.9375rem;
  --step-0: 1.0625rem;
  --step-1: 1.5rem;
  --step-2: 2.125rem;
  --step-3: 3rem;
  --step-4: 4.25rem;

  /* Tarpai — dideli, retėjantys žemyn */
  --space-sm: 2.5rem;
  --space-md: 5rem;
  --space-lg: 8rem;

  /* Forma */
  --radius-organic: 24px 4px 24px 4px;
  --measure: 34ch;
  --col-max: 62rem;

  --scroll-progress: 0;

  --noise-svg: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");

  color-scheme: light;
}

/* ---------- Reset (minimalus) ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg-page);
  color: var(--fg-page);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
h1, h2, h3 { font-family: var(--font-head); font-weight: 500; line-height: 1.3; margin: 0 0 0.6em; }
p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }
a { color: inherit; }
button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Utility klasės ---------- */
.u-measure { max-width: var(--measure); }
.u-bleed {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
}
.u-stack-sm > * + * { margin-top: var(--space-sm); }
.u-stack-md > * + * { margin-top: var(--space-md); }
.u-stack-lg > * + * { margin-top: var(--space-lg); }
.u-visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0; padding: 0; margin: -1px;
}
.u-eyebrow {
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ---------- Fiksuota lauko scena (fonas, judesio ašis) ---------- */
.silas-scene {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: linear-gradient(
    180deg,
    #EAF0DE 0%,
    var(--c-popierius) 45%,
    var(--c-salavijas) 100%
  );
}
.silas-scene__evening {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    #2A3A28 0%,
    var(--c-samana) 55%,
    #16210F 100%
  );
  opacity: var(--scroll-progress);
  will-change: opacity;
}
.silas-scene__ring {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  width: 100%;
  height: 22vh;
  min-height: 120px;
  opacity: 0.85;
}
.silas-scene__grain {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  mix-blend-mode: multiply;
  background-image: var(--noise-svg);
  background-size: 220px 220px;
}

@media (prefers-reduced-motion: reduce) {
  .silas-scene__evening { opacity: 0.18; }
}

/* ---------- Puslapio kolona (stabilus skaitomas paviršius) ---------- */
.silas-page {
  position: relative;
  max-width: var(--col-max);
  margin: 0 auto;
  background: var(--bg-page);
  isolation: isolate;
}
.silas-page::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.035;
  background-image: var(--noise-svg);
  background-size: 220px 220px;
  pointer-events: none;
}
.silas-page > * { position: relative; z-index: 1; }

/* ---------- Antraštinė juosta (H) ---------- */
.silas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.25rem;
  flex-wrap: wrap;
}
.silas-mark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--step-1);
}
.silas-mark svg { width: 2rem; height: 2rem; flex: none; }
.silas-mark__tag {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--step--1);
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  padding: 0.15em 0.7em;
}
.silas-header__return {
  font-size: var(--step--1);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

/* ---------- Herojus / pozicionavimas (P) ---------- */
.silas-scene-frame {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: flex-end;
  padding: 1.5rem 1.25rem 3rem;
}
.silas-scene-frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 55%;
  background: linear-gradient(180deg, transparent, rgba(20, 26, 15, 0.72) 78%);
  pointer-events: none;
}
.silas-scene-frame__text {
  position: relative;
  z-index: 1;
  color: var(--c-popierius);
  max-width: 40rem;
}
.silas-scene-frame__text h1 {
  font-size: clamp(2rem, 5vw + 1rem, var(--step-4));
  margin-bottom: 0.5em;
}
.silas-scene-frame__text p {
  font-size: var(--step-0);
  max-width: var(--measure);
}

/* ---------- Bendros sekcijos ---------- */
.silas-entry {
  padding: var(--space-md) 1.25rem;
  border-top: 1px solid var(--line);
}
.silas-entry h2 {
  font-size: var(--step-2);
  margin-bottom: 0.75em;
}
.silas-entry__lede {
  font-weight: 700;
  color: var(--accent);
}

/* Sąrašai turinyje */
.silas-entry ol,
.silas-entry ul {
  padding-left: 1.2em;
}
.silas-entry li + li { margin-top: 0.5em; }

.silas-split {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
.silas-split__box {
  background: var(--bg-surface);
  border-radius: var(--radius-organic);
  padding: 1.25rem 1.5rem;
}
.silas-split__box h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--step--1);
  text-transform: none;
  margin-bottom: 0.5em;
}
.silas-split__box ul { list-style: none; padding: 0; margin: 0; }
.silas-split__box li { margin-top: 0.35em; }

/* Įsipareigojimo mini lentelė */
.silas-tally {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: 1.25rem;
}
.silas-tally dt {
  font-size: var(--step--1);
  font-weight: 400;
  opacity: 0.85;
}
.silas-tally dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--step-1);
}

/* ---------- Dvejojančiam (D) ---------- */
.silas-query {
  border-top: 1px solid var(--line);
  padding: 1.1rem 0;
}
.silas-query:first-of-type { border-top: none; }
.silas-query > summary {
  cursor: pointer;
  font-family: var(--font-head);
  font-size: var(--step-0);
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.silas-query > summary::-webkit-details-marker { display: none; }
.silas-query__icon { flex: none; transition: transform 0.2s ease; }
.silas-query[open] .silas-query__icon { transform: rotate(45deg); }
.silas-query p { margin-top: 0.75em; }

@media (prefers-reduced-motion: reduce) {
  .silas-query__icon { transition: none; }
}

/* ---------- Forma (FORM) ---------- */
.silas-form {
  background: var(--bg-surface);
  border-radius: var(--radius-organic);
  padding: 1.75rem 1.5rem 2rem;
}
.silas-form__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
.silas-form__field { display: flex; flex-direction: column; gap: 0.4rem; }
.silas-form__field label {
  font-weight: 700;
  font-size: var(--step--1);
}
.silas-form__hint {
  font-size: var(--step--1);
  opacity: 0.75;
}
.silas-form__field input,
.silas-form__field select {
  font: inherit;
  padding: 0.7em 0.85em;
  border: 1px solid var(--c-samana);
  border-radius: 4px 12px 4px 12px;
  background: var(--c-popierius);
  color: var(--fg-page);
}
.silas-form__field input:invalid[data-touched="true"],
.silas-form__field[data-error="true"] input,
.silas-form__field[data-error="true"] select {
  border-color: var(--accent);
}
.silas-form__error {
  font-size: var(--step--1);
  color: var(--accent);
  font-weight: 700;
  min-height: 1.2em;
}
.silas-form__password-row {
  position: relative;
  display: flex;
}
.silas-form__password-row input { flex: 1; padding-right: 2.6em; }
.silas-form__toggle {
  position: absolute;
  right: 0.4em;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 0.4em;
  cursor: pointer;
  color: var(--fg-page);
}
.silas-form__consent {
  display: flex;
  align-items: flex-start;
  gap: 0.6em;
  font-size: var(--step--1);
}
.silas-form__consent input { margin-top: 0.25em; }

.silas-submit {
  margin-top: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: var(--c-samana);
  color: var(--c-popierius);
  border: none;
  border-radius: var(--radius-organic);
  padding: 0.85em 1.9em;
  font-weight: 700;
  font-size: var(--step-0);
  cursor: pointer;
}
.silas-submit:hover { background: #1a2617; }

.silas-form[data-state="success"] .silas-form__grid,
.silas-form[data-state="success"] .silas-submit { display: none; }
.silas-form__success {
  display: none;
  font-family: var(--font-head);
  font-size: var(--step-1);
}
.silas-form[data-state="success"] .silas-form__success {
  display: block;
}

/* ---------- Slapukai (C) ---------- */
.silas-consent {
  background: var(--bg-surface);
  border-radius: var(--radius-organic);
  padding: 1.25rem 1.5rem;
  margin: 0 1.25rem var(--space-sm);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
  justify-content: space-between;
}
.silas-consent p { margin: 0; max-width: 42ch; font-size: var(--step--1); }
.silas-consent button {
  background: var(--c-samana);
  color: var(--c-popierius);
  border: none;
  border-radius: var(--radius-organic);
  padding: 0.6em 1.4em;
  font-weight: 700;
  cursor: pointer;
  flex: none;
}
.silas-consent[hidden] { display: none; }

/* ---------- Poraštė (L) ---------- */
.silas-footer {
  padding: var(--space-sm) 1.25rem;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
}
.silas-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em 1.5em;
  list-style: none;
  padding: 0;
  margin: 0 0 1em;
}
.silas-footer p { max-width: 48ch; }

/* ---------- Nuolatinė apatinė CTA juosta ---------- */
.silas-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  background: var(--c-samana);
  color: var(--c-popierius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem calc(0.85rem + env(safe-area-inset-bottom, 0px));
}
.silas-bar p {
  margin: 0;
  font-size: var(--step--1);
  font-weight: 700;
}
.silas-bar a {
  background: var(--c-popierius);
  color: var(--c-samana);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--step--1);
  padding: 0.6em 1.3em;
  border-radius: var(--radius-organic);
  white-space: nowrap;
}
body { padding-bottom: var(--bar-h, 5rem); }

/* ============ Breakpoints ============ */

/* 768px */
@media (min-width: 768px) {
  :root { font-size: 18px; }
  .silas-header { padding: 1.5rem 2rem; }
  .silas-scene-frame { padding: 2rem 2rem 4rem; min-height: 92vh; }
  .silas-entry { padding: var(--space-lg) 2rem; }
  .silas-split { grid-template-columns: 1fr 1fr; }
  .silas-form__grid { grid-template-columns: 1fr 1fr; }
  .silas-form__field--full { grid-column: 1 / -1; }
  .silas-form { padding: 2.5rem; }
  .silas-footer { padding: var(--space-md) 2rem; }
  .silas-consent { margin: 0 2rem var(--space-md); }
}

/* 1024px */
@media (min-width: 1024px) {
  .silas-page { border-left: 1px solid var(--line); border-right: 1px solid var(--line); }
  .silas-entry__lede { font-size: var(--step-0); }
  .silas-bar { padding: 1rem 2rem; }
}

/* 1440px */
@media (min-width: 1440px) {
  :root { font-size: 19px; }
  .silas-scene-frame { min-height: 82vh; }
}