/* =====================================================================
   SHACKLE AI — UNIFIED DESIGN TOKENS & SYSTEM STYLES
   Tokens, Typography, Sidebar Rail Navigation, Auth Slot & Responsive Layout
   ===================================================================== */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root, html[data-theme="light"] {
  --ink: #f2ede1;
  --surface: #e9e2cf;
  --card-bg: #e2dac4;
  --rule: #d9d0b8;
  --rule-dim: rgba(217, 208, 184, 0.55);
  --accent: #2f6fb3;
  --accent-dim: rgba(47, 111, 179, 0.10);
  --accent-tint: rgba(47, 111, 179, 0.06);
  --btn-text: #f2ede1;
  --text: #23211b;
  --text-2: #55503f;
  --muted: #8a8371;
  --ghost: rgba(0, 0, 0, 0.05);
  --card-fff: #1c1a15;

  /* Status Colors */
  --green: #2d8a57;
  --green-tint: rgba(45, 138, 87, 0.12);
  --amber: #b07415;
  --amber-tint: rgba(176, 116, 21, 0.12);
  --red: #c0392b;
  --red-tint: rgba(192, 57, 43, 0.12);
  --blue: #2f6fb3;
  --blue-tint: rgba(47, 111, 179, 0.12);

  --font-mono: 'IBM Plex Mono', monospace;
  --font-sans: 'IBM Plex Sans', sans-serif;
}

html[data-theme="dark"] {
  --ink: #0b0d10;
  --surface: #14171b;
  --card-bg: #1c2026;
  --rule: #262a2f;
  --rule-dim: rgba(38, 42, 47, 0.6);
  --accent: #4f8fd6;
  --accent-dim: rgba(79, 143, 214, 0.12);
  --accent-tint: rgba(79, 143, 214, 0.08);
  --btn-text: #0b0d10;
  --text: #d7dade;
  --text-2: #aeb2b8;
  --muted: #6b7178;
  --ghost: rgba(255, 255, 255, 0.045);
  --card-fff: #ffffff;

  /* Status Colors */
  --green: #45b778;
  --green-tint: rgba(69, 183, 120, 0.14);
  --amber: #e09b2d;
  --amber-tint: rgba(224, 155, 45, 0.14);
  --red: #e74c3c;
  --red-tint: rgba(231, 76, 60, 0.16);
  --blue: #4f8fd6;
  --blue-tint: rgba(79, 143, 214, 0.14);
}

html, body {
  background: var(--ink);
  color: var(--text-2);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.2s ease, color 0.2s ease;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* =====================================================================
   APP FRAME & RESPONSIVE NAVIGATION RAIL
   ===================================================================== */
.frame {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

.rail {
  width: 232px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--rule);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: background 0.2s ease, border-color 0.2s ease;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.rail-mark {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 6px;
  border-radius: 2px;
  transition: color 0.15s;
}

.rail-mark:hover {
  color: var(--accent);
}

.rail-tabs {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tab {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  padding: 9px 10px;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: all 0.15s ease;
  display: block;
}

.tab:hover {
  color: var(--text);
  background: var(--ghost);
}

.tab.is-active {
  color: var(--accent);
  background: var(--accent-dim);
  border-left: 2px solid var(--accent);
  font-weight: 700;
}

.rail-group-label {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--muted);
  opacity: 0.7;
  padding: 12px 10px 4px 10px;
  text-transform: uppercase;
}

/* Stamp motif */
.stamp {
  align-self: flex-start;
  border: 2px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-align: center;
  padding: 8px 12px;
  transform: rotate(-3deg);
  line-height: 1.5;
  opacity: 0.85;
  margin-top: auto;
  pointer-events: none;
  user-select: none;
}

/* Theme toggle button */
.theme-toggle {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--rule);
  padding: 8px 10px;
  cursor: pointer;
  text-align: left;
  text-transform: uppercase;
  transition: border-color 0.15s, color 0.15s;
  width: 100%;
  border-radius: 2px;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* =====================================================================
   SITE-WIDE AUTHENTICATION SLOT
   ===================================================================== */
#auth-slot, .auth-slot {
  width: 100%;
}

.auth-signin-box {
  width: 100%;
}

.auth-action-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  padding: 9px 12px;
  border-radius: 2px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  transition: all 0.15s ease;
}

.auth-signin-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--rule);
}

.auth-signin-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.auth-g-icon {
  flex-shrink: 0;
}

.auth-user-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  background: var(--ghost);
  border: 1px solid var(--rule);
  border-radius: 2px;
}

.auth-user-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.auth-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  object-fit: cover;
  flex-shrink: 0;
}

.auth-avatar-fallback {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.auth-text-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.auth-display-name {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.5px;
}

.auth-sub-badge {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--green);
}

.auth-signout-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--rule);
  padding: 5px 8px;
  font-size: 9px;
  letter-spacing: 1.5px;
}

.auth-signout-btn:hover {
  color: var(--red);
  border-color: var(--red);
  background: var(--red-tint);
}

/* =====================================================================
   MOBILE COLLAPSE RESPONSIVENESS (<= 760px)
   ===================================================================== */
@media (max-width: 760px) {
  .frame {
    flex-direction: column;
  }

  .rail {
    width: 100%;
    height: auto;
    position: sticky;
    top: 0;
    border-right: none;
    border-bottom: 1px solid var(--rule);
    padding: 10px 14px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }

  .rail-mark {
    font-size: 11px;
    letter-spacing: 2px;
    flex-shrink: 0;
  }

  .rail-tabs {
    flex-direction: row;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    flex-shrink: 1;
    -webkit-overflow-scrolling: touch;
  }

  .tab {
    font-size: 10px;
    letter-spacing: 1px;
    padding: 6px 8px;
    border-left: none;
    border-bottom: 2px solid transparent;
    flex-shrink: 0;
  }

  .tab.is-active {
    border-left: none;
    border-bottom: 2px solid var(--accent);
  }

  .rail-group-label {
    padding: 0 4px;
    font-size: 8px;
    letter-spacing: 1px;
    flex-shrink: 0;
  }

  .stamp {
    display: none;
  }

  #auth-slot, .auth-slot {
    width: auto;
    flex-shrink: 0;
  }

  .auth-user-card {
    flex-direction: row;
    align-items: center;
    gap: 6px;
    padding: 4px 6px;
  }

  .auth-text-meta {
    display: none;
  }

  .auth-action-btn {
    width: auto;
    padding: 5px 8px;
    font-size: 9px;
  }

  .theme-toggle {
    width: auto;
    padding: 5px 8px;
    font-size: 9px;
    flex-shrink: 0;
  }
}