/* ============================================================================
   Slashman Tools — Unified Cross-Tool Navigation Bar
   ============================================================================
   File    : unified-nav.css
   Version : 1.1.0 (2026-08-03: Guides dropdown styles)
   Author  : ArchitectUX (@slashman413 design division)

   Drop-in nav styles. Every rule is scoped under .sn-nav / .sn-* so it can be
   injected into ANY tool page without clashing with the page's own styles.
   Depends on the tokens from design-system.css (--sn-*); if you do NOT load
   design-system.css, the nav still works because this file re-declares the
   few tokens the nav actually needs at the top (marked "nav-local").

   Pair with unified-nav.js which renders the <nav> from a config object.
   ========================================================================== */

/* --- nav-local token fallbacks (used only if design-system.css is absent) --- */
:root {
  --sn-primary: #6366f1;
  --sn-primary-400: #818cf8;
  --sn-accent: #a5b4fc;
  --sn-bg: #0a0a0f;
  --sn-surface: #101018;
  --sn-surface-2: #16161f;
  --sn-surface-3: #1d1d29;
  --sn-border: rgba(255, 255, 255, 0.08);
  --sn-border-strong: rgba(255, 255, 255, 0.14);
  --sn-text: #e8e8f0;
  --sn-text-2: #c7c7f0;
  --sn-text-muted: #7878a0;
  --sn-text-faint: #55557a;
  --sn-nav-height: 60px;
  --sn-transition: 0.18s ease;
  --sn-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
                  "Noto Sans TC", "Noto Sans SC", "PingFang TC", "PingFang SC",
                  "Microsoft JhengHei", "Microsoft YaHei", sans-serif;
}
[data-theme="light"] {
  --sn-primary: #6366f1;
  --sn-primary-400: #818cf8;
  --sn-accent: #4f46e5;
  --sn-bg: #f6f7fb;
  --sn-surface: #ffffff;
  --sn-surface-2: #f0f1f7;
  --sn-surface-3: #e6e8f2;
  --sn-border: rgba(15, 17, 32, 0.10);
  --sn-border-strong: rgba(15, 17, 32, 0.18);
  --sn-text: #171a24;
  --sn-text-2: #23263a;
  --sn-text-muted: #5a5f75;
  --sn-text-faint: #8a8fa8;
}

/* --- The bar --- */
.sn-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: color-mix(in srgb, var(--sn-surface) 88%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sn-border);
  font-family: var(--sn-font-sans);
}
/* Fallback when color-mix() is unsupported (older browsers) */
@supports not (background: color-mix(in srgb, red 50%, transparent)) {
  .sn-nav { background: var(--sn-surface); }
}

.sn-nav-inner {
  max-width: var(--sn-container-xl, 1280px);
  margin: 0 auto;
  height: var(--sn-nav-height);
  padding: 0 var(--sn-space-4, 16px);
  display: flex;
  align-items: center;
  gap: var(--sn-space-4, 16px);
}

/* --- Brand --- */
.sn-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--sn-text);
  text-decoration: none;
  white-space: nowrap;
}
.sn-brand:hover { text-decoration: none; color: var(--sn-text); }
.sn-brand__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--sn-brand-gradient, linear-gradient(135deg, #a5b4fc, #f0abfc, #67e8f9));
  font-size: 16px;
  flex: 0 0 auto;
}
.sn-brand__text { background: var(--sn-brand-gradient, linear-gradient(135deg, #a5b4fc, #f0abfc, #67e8f9)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* --- Desktop links --- */
.sn-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: var(--sn-space-2, 8px);
  flex: 1;
  min-width: 0;
}
.sn-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  border-radius: 9px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--sn-text-2);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--sn-transition), color var(--sn-transition);
}
.sn-link:hover { background: rgba(99, 102, 241, 0.12); color: var(--sn-text); text-decoration: none; }
.sn-link.sn-active {
  background: rgba(99, 102, 241, 0.18);
  color: var(--sn-accent);
  box-shadow: inset 0 -2px 0 var(--sn-primary);
}

/* --- Guides dropdown (items with `children`) --- */
.sn-dd-wrap { position: relative; }
.sn-dd-wrap > .sn-link::after {
  content: "▾";
  margin-left: 5px;
  font-size: 10.5px;
  opacity: 0.65;
}
.sn-dd {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  padding-top: 8px;            /* hover bridge — keeps the menu open while moving the mouse */
  z-index: 1001;
}
.sn-dd-inner {
  min-width: 224px;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border-strong);
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.4);
}
.sn-dd-wrap:hover .sn-dd,
.sn-dd-wrap:focus-within .sn-dd { display: block; }
.sn-dd .sn-link {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  white-space: nowrap;
  font-size: 14px;
}
.sn-dd .sn-link:hover { background: rgba(99, 102, 241, 0.12); }
.sn-dd .sn-link.sn-active {
  background: rgba(99, 102, 241, 0.18);
  color: var(--sn-accent);
  box-shadow: none;
}
[data-theme="light"] .sn-dd-inner { box-shadow: 0 14px 36px rgba(15, 17, 32, 0.18); }

/* --- Right-side actions --- */
.sn-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

/* Language switcher */
.sn-lang {
  display: inline-flex;
  align-items: center;
  background: var(--sn-surface-2);
  border: 1px solid var(--sn-border-strong);
  border-radius: var(--sn-radius-full, 999px);
  padding: 3px;
}
.sn-lang-btn {
  border: none;
  background: transparent;
  color: var(--sn-text-faint);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1;
  padding: 6px 9px;
  border-radius: var(--sn-radius-full, 999px);
  cursor: pointer;
  transition: background-color var(--sn-transition), color var(--sn-transition);
}
.sn-lang-btn:hover { color: var(--sn-text); }
.sn-lang-btn[aria-pressed="true"] {
  background: var(--sn-primary);
  color: #fff;
}

/* Theme toggle (cycles dark → light → system) */
.sn-theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--sn-border-strong);
  border-radius: var(--sn-radius-full, 999px);
  background: var(--sn-surface-2);
  color: var(--sn-text-2);
  font-size: 15px;
  cursor: pointer;
  transition: background-color var(--sn-transition), border-color var(--sn-transition);
}
.sn-theme:hover { background: var(--sn-surface-3); border-color: var(--sn-primary-400); }
.sn-theme:focus-visible, .sn-lang-btn:focus-visible, .sn-burger:focus-visible {
  outline: 2px solid var(--sn-primary-400);
  outline-offset: 2px;
}

/* Ko-fi support button */
.sn-kofi {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--sn-radius-full, 999px);
  background: var(--sn-brand-gradient, linear-gradient(135deg, #a5b4fc, #f0abfc, #67e8f9));
  color: #0a0a0f;
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  transition: filter var(--sn-transition), transform var(--sn-transition);
}
.sn-kofi:hover { filter: brightness(1.1); transform: translateY(-1px); text-decoration: none; color: #0a0a0f; }

/* Hamburger (mobile only) */
.sn-burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--sn-border-strong);
  border-radius: 9px;
  background: var(--sn-surface-2);
  color: var(--sn-text);
  font-size: 19px;
  line-height: 1;
  cursor: pointer;
}

/* --- Mobile slide-down panel --- */
.sn-panel {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--sn-border);
  background: var(--sn-surface);
  padding: var(--sn-space-2, 8px) var(--sn-space-4, 16px) var(--sn-space-4, 16px);
}
.sn-nav[data-open="true"] .sn-panel { display: flex; }
.sn-panel .sn-link { padding: 12px 10px; font-size: 15px; border-bottom: 1px solid var(--sn-border); border-radius: 8px; }
.sn-panel .sn-link:last-of-type { border-bottom: none; }
/* mobile panel: dropdown children inline, indented under the parent */
.sn-panel .sn-dd { display: block; position: static; padding-top: 0; }
.sn-panel .sn-dd-inner {
  min-width: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  border-radius: 0;
  padding: 0 0 0 14px;
}
.sn-panel .sn-dd-wrap > .sn-link::after { content: none; }
.sn-panel-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.sn-panel .sn-kofi { flex: 1; justify-content: center; }

/* --- Responsive --- */
@media (max-width: 900px) {
  .sn-links { display: none; }
  .sn-burger { display: inline-flex; }
  .sn-lang .sn-lang-btn { padding: 6px 8px; font-size: 12px; }
}

@media (max-width: 480px) {
  .sn-brand__text { display: none; }        /* icon-only brand on tiny screens */
  .sn-kofi span { display: none; }          /* ☕ only */
  .sn-kofi { padding: 8px 11px; }
  .sn-lang { padding: 2px; }
  .sn-lang-btn { padding: 5px 7px; }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .sn-nav, .sn-panel { transition: none; }
}

/* --- Light-theme adjustments that need a touch more contrast --- */
[data-theme="light"] .sn-kofi { color: #171a24; }
[data-theme="light"] .sn-kofi:hover { color: #171a24; }