/* ==========================================================
   MintPass Protocol Navigation System
   Two-layer: top nav + sidebar layout foundation
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500&display=swap');

/* ── Root tokens ── */
:root {
  --pn-parchment:     #f7f2e8;
  --pn-parchment-alt: #f2ece0;
  --pn-border:        #e2d9c6;
  --pn-border-dark:   rgba(200, 188, 160, 0.18);
  --pn-text:          #2a2820;
  --pn-text-dim:      #6a6650;
  --pn-height:        68px;
}

/* ── Nav shell ── */
.proto-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 999;
  height: var(--pn-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
  background: transparent;
  border-bottom: 1px solid transparent;
}

/* Scrolled → parchment */
.proto-nav.scrolled {
  background: var(--pn-parchment);
  border-bottom: 1px solid var(--pn-border);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

/* Static nav (always parchment, no transparency) */
.proto-nav.static {
  background: var(--pn-parchment);
  border-bottom: 1px solid var(--pn-border);
}

/* ── Logo ── */
.proto-logo {
  font-family: 'Syne', serif, sans-serif;
  font-weight: 800;
  font-size: 1.22rem;
  letter-spacing: -0.025em;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.92);
  flex-shrink: 0;
  transition: color 0.2s, opacity 0.15s;
  line-height: 1;
}

.proto-logo:hover { opacity: 0.75; }

.proto-nav.scrolled .proto-logo,
.proto-nav.static  .proto-logo {
  color: var(--pn-text);
}

/* ── Desktop items ── */
.proto-nav-items {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.proto-nav-item { position: relative; }

/* Shared button / link typography */
.proto-nav-btn,
.proto-nav-standalone {
  font-family: 'IBM Plex Sans', 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: none;
  background: none;
  cursor: pointer;
  text-decoration: none;
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.82);
  transition: color 0.15s, background 0.15s;
}

.proto-nav-btn:hover,
.proto-nav-standalone:hover {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 1);
}

/* Scrolled / static: dark text */
.proto-nav.scrolled .proto-nav-btn,
.proto-nav.scrolled .proto-nav-standalone,
.proto-nav.static  .proto-nav-btn,
.proto-nav.static  .proto-nav-standalone {
  color: var(--pn-text-dim);
}

.proto-nav.scrolled .proto-nav-btn:hover,
.proto-nav.scrolled .proto-nav-standalone:hover,
.proto-nav.static  .proto-nav-btn:hover,
.proto-nav.static  .proto-nav-standalone:hover {
  background: rgba(0, 0, 0, 0.055);
  color: var(--pn-text);
}

/* Light pages — dark text even when transparent */
[data-nav="light"] .proto-nav:not(.scrolled):not(.static) .proto-logo         { color: var(--pn-text); }
[data-nav="light"] .proto-nav:not(.scrolled):not(.static) .proto-nav-btn      { color: var(--pn-text-dim); }
[data-nav="light"] .proto-nav:not(.scrolled):not(.static) .proto-nav-standalone{ color: var(--pn-text-dim); }
[data-nav="light"] .proto-nav:not(.scrolled):not(.static) .proto-hamburger span{ background: var(--pn-text); }

[data-nav="light"] .proto-nav:not(.scrolled):not(.static) .proto-nav-btn:hover,
[data-nav="light"] .proto-nav:not(.scrolled):not(.static) .proto-nav-standalone:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--pn-text);
}

/* Chevron SVG */
.proto-nav-btn svg {
  width: 11px;
  height: 11px;
  transition: transform 0.15s;
  opacity: 0.55;
  flex-shrink: 0;
}
.proto-nav-btn.open svg { transform: rotate(180deg); }

/* ── Dropdown ── */
.proto-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--pn-parchment);
  border: 1px solid var(--pn-border);
  border-radius: 10px;
  padding: 0.35rem;
  min-width: 210px;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.09),
    0 1px 4px  rgba(0, 0, 0, 0.04);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.proto-dropdown.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.proto-dropdown a {
  display: block;
  padding: 0.6rem 0.875rem;
  font-family: 'IBM Plex Sans', 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: #3a3820;
  text-decoration: none;
  border-radius: 7px;
  transition: background 0.1s, color 0.1s;
}

.proto-dropdown a:hover {
  background: var(--pn-parchment-alt);
  color: #1a1810;
}

/* ── Hamburger ── */
.proto-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 0.15s;
}

.proto-hamburger:hover { background: rgba(255, 255, 255, 0.1); }

.proto-nav.scrolled .proto-hamburger:hover,
.proto-nav.static  .proto-hamburger:hover {
  background: rgba(0, 0, 0, 0.07);
}

.proto-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255, 255, 255, 0.88);
  border-radius: 2px;
  transition: background 0.2s, transform 0.22s, opacity 0.18s;
}

.proto-nav.scrolled .proto-hamburger span,
.proto-nav.static  .proto-hamburger span {
  background: var(--pn-text);
}

.proto-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.proto-hamburger.open span:nth-child(2) { opacity: 0; }
.proto-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile menu ── */
.proto-mobile-menu {
  position: fixed;
  top: var(--pn-height);
  left: 0; right: 0;
  background: var(--pn-parchment);
  border-bottom: 1px solid var(--pn-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease;
  z-index: 998;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
}

.proto-mobile-menu.open { max-height: 640px; }

.proto-mobile-menu-inner {
  padding: 0.5rem 1.25rem 1.5rem;
}

.proto-mobile-section {
  border-bottom: 1px solid var(--pn-border);
}
.proto-mobile-section:last-child { border-bottom: none; }

.proto-mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.85rem 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'IBM Plex Sans', 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--pn-text);
  text-align: left;
}

.proto-mobile-toggle svg {
  width: 11px; height: 11px;
  opacity: 0.45;
  transition: transform 0.18s;
  flex-shrink: 0;
}
.proto-mobile-toggle.open svg { transform: rotate(180deg); }

.proto-mobile-links {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease;
}
.proto-mobile-links.open { max-height: 400px; }

.proto-mobile-links a,
.proto-mobile-standalone {
  display: block;
  padding: 0.6rem 0.875rem;
  font-family: 'IBM Plex Sans', 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--pn-text-dim);
  text-decoration: none;
  border-radius: 7px;
  margin-bottom: 1px;
  transition: background 0.1s, color 0.1s;
}

.proto-mobile-links a:hover,
.proto-mobile-standalone:hover {
  background: var(--pn-parchment-alt);
  color: var(--pn-text);
}

.proto-mobile-standalone {
  margin: 0.375rem 0;
  font-weight: 500;
  color: var(--pn-text);
}

/* ── Responsive: hide desktop items on mobile ── */
@media (max-width: 768px) {
  .proto-nav-items { display: none; }
  .proto-hamburger { display: flex; }
  .proto-nav { padding: 0 1.5rem; }
}

/* ============================================================
   SIDEBAR LAYOUT FOUNDATION
   Supports: left sidebar (240–280px) + main content (flex)
   ============================================================ */

.proto-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - var(--pn-height));
  margin-top: var(--pn-height);
}

/* Left sidebar column — structurally present, content optional */
.proto-sidebar {
  position: sticky;
  top: var(--pn-height);
  height: calc(100vh - var(--pn-height));
  overflow-y: auto;
  border-right: 1px solid var(--pn-border);
  padding: 2rem 1.5rem;
  background: #faf6ee;
}

/* Main content column */
.proto-content {
  padding: 3rem 3.5rem 4rem;
  min-width: 0; /* prevent grid blowout */
}

@media (max-width: 900px) {
  .proto-layout {
    grid-template-columns: 1fr;
  }
  .proto-sidebar {
    display: none;
  }
  .proto-content {
    padding: 2rem 1.5rem 3rem;
  }
}

/* ============================================================
   PAGE TYPOGRAPHY — light parchment pages
   ============================================================ */

.proto-page {
  background: var(--pn-parchment);
  color: var(--pn-text);
  font-family: 'IBM Plex Sans', 'DM Sans', sans-serif;
  min-height: 100vh;
}

.proto-page-eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  color: #8a7e5a;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.proto-page-title {
  font-family: 'Syne', serif, sans-serif;
  font-weight: 700;
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  color: #1a1810;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

.proto-page-intro {
  font-size: 1.05rem;
  color: #5a5640;
  line-height: 1.75;
  max-width: 560px;
  font-weight: 400;
}

.proto-divider {
  border: none;
  border-top: 1px solid var(--pn-border);
  margin: 2.5rem 0;
}

.proto-coming-soon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  color: #9a8e60;
  background: #ede5cc;
  border: 1px solid #ddd0a8;
  padding: 0.35rem 0.8rem;
  border-radius: 4px;
  letter-spacing: 0.06em;
  margin-top: 2rem;
}

/* ── Footer for light pages ── */
.proto-footer {
  padding: 2.5rem;
  border-top: 1px solid var(--pn-border);
  background: #f2ece0;
  text-align: center;
}

.proto-footer p {
  font-family: 'Space Mono', monospace;
  font-size: 0.68rem;
  color: #9a8e68;
  letter-spacing: 0.06em;
}

/* ============================================================
   LOGO ICON (SVG medallion placed in nav)
   ============================================================ */

.proto-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.proto-logo-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  display: block;
  transition: opacity 0.15s;
}
.proto-logo:hover .proto-logo-icon { opacity: 0.75; }

/* Logo icon colours adapt via CSS — dark/light handled by .mp-logo-* classes */
.mp-logo-core { fill: #8B7432; }
.mp-logo-line { stroke: #8B7432; stroke-width: 7; stroke-linecap: round; fill: none; }
.mp-logo-accent { fill: #2d5a3d; }
.mp-logo-ring { fill: none; stroke: #8B7432; stroke-width: 5; opacity: 0.18; }

/* Scrolled/static nav — logo stays brand-coloured (always correct) */
/* Dark theme overrides handled in theme.css */

/* ============================================================
   NAV RIGHT AREA — flex row for items + toggle
   ============================================================ */

/* Right side of nav: items + toggle together */
.proto-nav-right {
  display: flex;
  align-items: center;
  gap: 0;
}

/* Mobile: hide desktop items, show hamburger */
@media (max-width: 768px) {
  .proto-nav-right .proto-nav-items { display: none; }
}