/* Tiny Tools design foundation — calm, editorial, light.
   Logical properties only, so RTL mirrors for Persian with no overrides.
   8px grid. Obsidian text, ember accent used sparingly. */

:root {
  --tt-bg: #FAFAF8;
  --tt-surface: #FFFFFF;
  --tt-surface-2: #F1F2F0;
  --tt-surface-3: #E8EAE8;
  --tt-border: #E3E5E3;
  --tt-border-strong: #CDD1CF;
  --tt-text: #0A0E10;
  --tt-text-soft: #3A4247;
  --tt-text-muted: #5F6A70;
  --tt-accent: #D94B3A;
  --tt-accent-strong: #B23A2B;
  --tt-accent-soft: #FBEDEA;
  --tt-ok: #2E7D5B;
  --tt-radius: 6px;
  --tt-radius-sm: 4px;
  --tt-radius-btn: 4px;
  --tt-shadow: 0 1px 2px rgba(10, 14, 16, 0.04), 0 8px 24px rgba(10, 14, 16, 0.06);
  --tt-shadow-lg: 0 2px 4px rgba(10, 14, 16, 0.05), 0 24px 56px rgba(10, 14, 16, 0.14);
  --tt-focus: 0 0 0 3px rgba(217, 75, 58, 0.28);
  --tt-font-ui: 'Inter', 'Vazirmatn', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --tt-font-display: 'Source Serif 4', 'Vazirmatn', Georgia, serif;
  --tt-wrap: 1120px;
}

/* Persian: Vazirmatn everywhere (UI + display). */
:lang(fa) {
  --tt-font-ui: 'Vazirmatn', 'Inter', system-ui, sans-serif;
  --tt-font-display: 'Vazirmatn', 'Source Serif 4', Georgia, serif;
}
:lang(fa), :lang(fa) * { font-family: var(--tt-font-ui); }
:lang(fa) h1, :lang(fa) h2, :lang(fa) h3, :lang(fa) h4,
:lang(fa) .hero__title, :lang(fa) .brand__wordmark { font-family: var(--tt-font-display); }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh; display: flex; flex-direction: column;
  background: var(--tt-bg); color: var(--tt-text);
  font-family: var(--tt-font-ui); font-size: 16px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--tt-font-display); line-height: 1.2; letter-spacing: -0.012em;
  font-weight: 600; color: var(--tt-text);
}
:lang(fa) h1, :lang(fa) h2, :lang(fa) h3, :lang(fa) h4 { letter-spacing: 0; line-height: 1.5; font-weight: 700; }

/* Links: plain by default; underline only inside running prose. */
a { color: inherit; text-decoration: none; }
.prose a, .link-inline, .auth__switch a, .card__hint a {
  color: var(--tt-accent-strong); text-decoration: underline;
  text-decoration-thickness: 1px; text-underline-offset: 0.18em;
}
.prose a:hover, .link-inline:hover, .auth__switch a:hover { color: var(--tt-accent); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--tt-accent); outline-offset: 2px; border-radius: var(--tt-radius-sm); }
.skip-link {
  position: absolute; inset-inline-start: 1rem; inset-block-start: -4rem; z-index: 500;
  background: var(--tt-text); color: #fff; padding: 0.5rem 1rem; border-radius: var(--tt-radius-sm);
}
.skip-link:focus { inset-block-start: 1rem; }

/* ---------------------------------------------------------------- layout */

.site-header {
  background: rgba(250, 250, 248, 0.9); backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--tt-border);
  position: sticky; top: 0; z-index: 30;
}
.site-header__inner {
  max-inline-size: var(--tt-wrap); margin-inline: auto;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.75rem 1.5rem; min-block-size: 64px;
}

.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--tt-text); font-weight: 600; }
.brand__mark {
  inline-size: 0.6rem; block-size: 0.6rem; border-radius: 50%;
  background: var(--tt-accent); box-shadow: 0 0 0 4px var(--tt-accent-soft);
}
.brand__wordmark { font-family: var(--tt-font-display); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.01em; }

.site-nav { display: flex; align-items: center; gap: 1.5rem; flex: 1; }
.site-header__actions { display: flex; align-items: center; gap: 0.75rem; margin-inline-start: auto; }

.site-main { flex: 1 0 auto; width: 100%; }

.site-footer { border-top: 1px solid var(--tt-border); margin-top: auto; }
.site-footer__inner {
  max-inline-size: var(--tt-wrap); margin-inline: auto; padding: 1.5rem;
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; justify-content: space-between; align-items: center;
}
.site-footer__copy { margin: 0; color: var(--tt-text-muted); font-size: 0.875rem; }
.site-footer__nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.site-footer__nav a { color: var(--tt-text-muted); font-size: 0.875rem; }
.site-footer__nav a:hover { color: var(--tt-text); }

/* ------------------------------------------------------------ components */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.65rem 1.25rem; border-radius: var(--tt-radius-btn); border: 1px solid transparent;
  font: inherit; font-weight: 600; font-size: 0.95rem; line-height: 1.3; cursor: pointer;
  text-decoration: none; transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover, .btn:focus { text-decoration: none; }
.btn--primary { background: var(--tt-text); color: #fff; }
.btn--primary:hover { background: #20282C; }
.btn--ember { background: var(--tt-accent); color: #fff; }
.btn--ember:hover { background: var(--tt-accent-strong); }
.btn--ghost { background: var(--tt-surface); color: var(--tt-text); border-color: var(--tt-border-strong); }
.btn--ghost:hover { border-color: var(--tt-text); }
.btn--lg { padding: 0.85rem 1.6rem; font-size: 1rem; }
.btn:focus-visible { outline: 2px solid var(--tt-accent); outline-offset: 2px; border-radius: var(--tt-radius-btn); }
.btn[aria-disabled='true'] { opacity: 0.45; pointer-events: none; }

.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field__label { font-weight: 600; font-size: 0.875rem; }
.field__opt { font-weight: 400; color: var(--tt-text-muted); }
.field__hint { margin: 0; font-size: 0.8rem; color: var(--tt-text-muted); }
.input, .select, .textarea {
  padding: 0.65rem 0.85rem; border-radius: var(--tt-radius-sm);
  border: 1px solid var(--tt-border-strong); background: var(--tt-surface); color: var(--tt-text);
  font: inherit; width: 100%;
}
.input:focus, .select:focus, .textarea:focus, .stack-form input:focus, .stack-form textarea:focus {
  outline: none; border-color: var(--tt-accent); box-shadow: var(--tt-focus);
}
.textarea { resize: vertical; min-height: 5rem; }

.card {
  background: var(--tt-surface); border: 1px solid var(--tt-border);
  border-radius: var(--tt-radius); padding: 1.5rem; box-shadow: var(--tt-shadow);
}
.card__title { margin: 0 0 0.5rem; font-size: 1.15rem; }
.card__body { color: var(--tt-text-muted); margin: 0; }

.grid { display: grid; gap: 1.5rem; }
.grid--auto { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 760px) { .grid--2, .grid--3 { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- modal */

.modal {
  position: fixed; inset: 0; z-index: 200; display: flex;
  align-items: center; justify-content: center; padding: 1rem;
}
.modal__backdrop { position: absolute; inset: 0; background: rgba(10, 14, 16, 0.5); }
.modal__dialog {
  position: relative; background: var(--tt-surface); border: 1px solid var(--tt-border);
  border-radius: var(--tt-radius); padding: 1.75rem; max-inline-size: 28rem; width: 100%;
  box-shadow: var(--tt-shadow-lg);
}
.modal__title { margin: 0 0 0.5rem; font-size: 1.25rem; }
.modal__text { margin: 0 0 1.5rem; color: var(--tt-text-muted); }
.modal__actions { display: flex; justify-content: flex-end; gap: 0.5rem; flex-wrap: wrap; }

/* ---------------------------------------------------------------- toasts */

.toasts {
  position: fixed; bottom: 1rem; inset-inline-end: 1rem;
  display: flex; flex-direction: column; gap: 0.5rem; z-index: 300; max-inline-size: 20rem;
}
.toast {
  display: flex; align-items: center; gap: 0.75rem; padding: 0.7rem 0.9rem;
  background: var(--tt-surface); border: 1px solid var(--tt-border);
  border-radius: var(--tt-radius); box-shadow: var(--tt-shadow);
  border-inline-start: 4px solid var(--tt-accent);
}
.toast--ok { border-inline-start-color: #4CAF7D; }
.toast--err { border-inline-start-color: var(--tt-accent); }
.toast__msg { flex: 1; }
.toast__close { background: none; border: 0; color: var(--tt-text-muted); font-size: 1.2rem; cursor: pointer; line-height: 1; }
/* Native [hidden] must win over component display rules. */
[hidden] { display: none !important; }

@media (max-width: 640px) {
  .site-header__inner { gap: 0.75rem; padding-inline: 1rem; }
  .site-nav { gap: 1rem; }
  .site-footer__inner { padding-inline: 1rem; }
}