/* ==========================================================================
   NOCTURNE — NullHyd Events design system
   Same dark token system and typography as the nullhyd.org homepage
   (templates/home.html), re-expressed as CSS variables + component classes
   so every app page (auth, profile, event detail, admin) reads as one site.
   ========================================================================== */

:root {
  --color-bg: #0a0a0a;
  --color-surface: #111111;
  --color-surface-raised: #161616;
  --color-text: #ffffff;
  --color-accent: #0063d7;
  --color-accent-2: #00b664;
  --color-divider: #1e1e1e;
  --color-accent-glow: rgba(0, 99, 215, 0.25);

  --color-neutral-100: #f5f5f6;
  --color-neutral-200: #e2e2e5;
  --color-neutral-300: #c7c7cc;
  --color-neutral-400: #a3a3ab;
  --color-neutral-500: #86868f;
  --color-neutral-600: #656570;
  --color-neutral-700: #48484f;
  --color-neutral-800: #2c2c31;
  --color-neutral-900: #1c1c1f;

  --color-accent-100: #e5f0fb;
  --color-accent-200: #c0dcf6;
  --color-accent-300: #8cc0ef;
  --color-accent-400: #4a9be3;
  --color-accent-500: #0063d7;
  --color-accent-600: #0052b3;
  --color-accent-700: #003f8a;
  --color-accent-800: #052c5c;
  --color-accent-900: #051d3d;

  --color-accent-2-100: #e6faf0;
  --color-accent-2-200: #bdf1d7;
  --color-accent-2-300: #83e2b3;
  --color-accent-2-400: #3fca87;
  --color-accent-2-500: #00b664;
  --color-accent-2-600: #00944f;
  --color-accent-2-700: #0a6f3d;
  --color-accent-2-800: #0e4b2c;
  --color-accent-2-900: #0c2e1e;

  /* Semantic status colors — same lightness family as the accent ramps so
     badges/alerts read as part of the same system, not a bolt-on. */
  --color-success: #00b664;
  --color-success-100: #e6faf0;
  --color-success-800: #0e4b2c;
  --color-warning: #e8c34d;
  --color-warning-100: #fdf6e0;
  --color-warning-800: #4a3a0a;
  --color-danger: #e21027;
  --color-danger-100: #fbe2e5;
  --color-danger-800: #3d0a10;

  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading-weight: 700;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --shadow-sm: 0 0 0 1px #3f424d;
  --shadow-md: 0 0 0 1px #595d6c, 0 6px 18px rgba(0,0,0,0.55);
  --shadow-lg: 0 0 0 1px #9397ab, 0 16px 40px rgba(0,0,0,0.65);

  --content-max: 1280px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-body); font-size: 15px; line-height: 1.6; font-weight: 400;
  min-height: 100vh; display: flex; flex-direction: column;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 var(--space-2);
}
h1 { font-size: clamp(32px, 20px + 3vw, 56px); }
h2 { font-size: clamp(28px, 18px + 2.5vw, 48px); }
h3 { font-size: clamp(22px, 14px + 1.5vw, 38px); }
h4 { font-size: 19px; }
h5 { font-size: 16px; }
h6 { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
img { display: block; max-width: 100%; }
code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.9em; }
.text-muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.text-center { text-align: center; }
.color-accent { color: var(--color-accent); }
.color-success { color: var(--color-success); }
.color-warning { color: var(--color-warning); }
.color-danger { color: var(--color-danger); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.container { max-width: var(--content-max); margin: 0 auto; padding: 0 var(--space-4); width: 100%; }

/* — rules — */
.hr {
  height: 1px; border: 0; margin: var(--space-4) 0;
  background: linear-gradient(to right, transparent, var(--color-divider) 48px,
    var(--color-divider) calc(100% - 48px), transparent);
}

/* — buttons — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: 600;
  font-size: 13.5px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: 9px 16px; border-radius: var(--radius-md);
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}
.btn svg { display: block; flex-shrink: 0; }
.btn:disabled, .btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: var(--color-accent); color: #fff; border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow), inset 0 1px 0 rgba(255,255,255,0.1);
}
.btn-primary:hover { background: #0070f0; border-color: #0070f0; box-shadow: 0 6px 30px var(--color-accent-glow), inset 0 1px 0 rgba(255,255,255,0.15); transform: translateY(-1px); }
.btn-primary:active { background: #0052b3; border-color: #0052b3; transform: translateY(0); }
.btn-secondary, .btn-outline { border-color: var(--color-divider); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.btn-secondary:hover, .btn-outline:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); background: color-mix(in srgb, var(--color-text) 4%, transparent); transform: translateY(-1px); }
.btn-secondary:active, .btn-outline:active { background: color-mix(in srgb, var(--color-text) 10%, transparent); transform: translateY(0); }
.btn-ghost { color: var(--color-accent); border-color: transparent; padding-inline: var(--space-2); }
.btn-ghost:hover { background: color-mix(in srgb, var(--color-accent) 10%, transparent); }
.btn-ghost:active { background: color-mix(in srgb, var(--color-accent) 18%, transparent); }
.btn-danger { color: var(--color-danger); border-color: color-mix(in srgb, var(--color-danger) 55%, transparent); }
.btn-danger:hover { background: color-mix(in srgb, var(--color-danger) 12%, transparent); }
.btn-danger:active { background: color-mix(in srgb, var(--color-danger) 22%, transparent); }
.btn-icon { width: 36px; height: 36px; padding: 0; }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }
.btn.active { background: color-mix(in srgb, var(--color-accent) 16%, transparent); border-color: var(--color-accent); color: var(--color-accent); }

/* — forms — */
.field { display: flex; flex-direction: column; gap: 5px; }
.field > label, label.form-label, label.field-label {
  display: block; font-size: 12px; margin-bottom: 5px;
  color: color-mix(in srgb, var(--color-text) 70%, transparent);
  font-weight: 500; letter-spacing: 0.02em;
}
.required-star { color: var(--color-danger); margin-left: 2px; }
.input, .form-control, .form-input, .field-input, textarea.input,
select.input, input[type="text"], input[type="email"], input[type="password"],
input[type="tel"], input[type="url"], input[type="number"], input[type="date"],
input[type="datetime-local"], input[type="search"], textarea, select {
  width: 100%; min-height: 40px; padding: 8px 12px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: var(--radius-md);
  transition: border-color 0.15s ease;
}
.input:hover, .form-control:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible, .form-control:focus, .input:focus { border-color: var(--color-accent); outline-offset: 0; }
textarea.input, textarea.form-control, textarea { min-height: 90px; resize: vertical; }
input:disabled, .input:disabled { color: var(--color-text); opacity: 0.55; cursor: not-allowed; }
.form-checkbox { width: 18px; height: 18px; accent-color: var(--color-accent); cursor: pointer; flex-shrink: 0; }
.form-error, .field-error { font-size: 12.5px; color: var(--color-danger); margin-top: 4px; }
.form-helper, .field-hint { font-size: 12px; color: var(--color-text); opacity: 0.55; margin-top: 4px; }
.form-group { margin-bottom: var(--space-4); }
.form-group:last-child { margin-bottom: 0; }

/* — cards — */
.card {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-4); border-radius: var(--radius-lg); background: var(--color-surface);
  border: 1px solid var(--color-divider);
}
.card-kicker { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); }
.card-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 18px; line-height: 1.25; }
.card-body { margin: 0; font-size: 13.5px; opacity: 0.8; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: color-mix(in srgb, var(--color-text) 50%, transparent); }
.elev-sm { box-shadow: var(--shadow-sm); }
.elev-md { box-shadow: var(--shadow-md); }
.elev-lg { box-shadow: var(--shadow-lg); }

/* ==========================================================================
   Badges & Tags
   ========================================================================== */
.tag, .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  white-space: nowrap;
  gap: 6px;
}

.tag-accent, .badge-wave-1, .badge-confirmed, .badge-attended { background: var(--color-accent-800); color: var(--color-accent-100); }
.tag-accent-2, .badge-wave-2 { background: var(--color-accent-2-800); color: var(--color-accent-2-100); }
.tag-neutral, .badge-neutral, .badge-rsvped, .badge-wave-3, .badge-voided { background: var(--color-neutral-800); color: var(--color-neutral-200); }

/* Gamified Tiers CSS */
.badge-tier-core { background: var(--color-accent-600); color: #fff; text-shadow: 0 0 5px rgba(255,255,255,0.5); box-shadow: 0 0 8px var(--color-accent-600); }
.badge-tier-legend_iii, .badge-tier-legend_ii, .badge-tier-legend_i { background: var(--color-accent-800); color: var(--color-accent-100); }
.badge-tier-champion_iii, .badge-tier-champion_ii, .badge-tier-champion_i { background: var(--color-accent-2-800); color: var(--color-accent-2-100); }
.badge-tier-member_iii, .badge-tier-member_ii, .badge-tier-member_i { background: var(--color-neutral-700); color: var(--color-neutral-100); }
.badge-tier-newbie { background: var(--color-neutral-800); color: var(--color-neutral-400); }

.badge-waitlisted { background: var(--color-warning-900); color: var(--color-warning-200); }
.tag-success, .badge-success { background: var(--color-success-800); color: var(--color-success-100); }
.tag-warning, .badge-warning { background: var(--color-warning-800); color: var(--color-warning-100); }
.tag-danger, .badge-danger, .badge-cancelled, .badge-no_show, .badge-flagged { background: var(--color-danger-800); color: var(--color-danger-100); }
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); background: transparent; }
.tag-outline::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent-2); flex-shrink: 0; }

/* — navigation — */
/* Mirrors the nullhyd.org homepage nav (templates/home.html) so every page
   in the app reads as one site. Sticky (not fixed+fade-on-scroll) because
   interior pages have no hero to scroll over — it always renders in its
   "scrolled" state, which is visually identical once home.html scrolls. */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(20px) saturate(1.5); -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--color-divider);
}
.nav-container {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  max-width: var(--content-max); margin: 0 auto; width: 100%;
  flex-wrap: wrap;
}
.nav-brand {
  font-family: var(--font-heading); font-weight: 700;
  font-size: 20px; letter-spacing: -0.02em;
  margin-right: auto; text-decoration: none; color: var(--color-text);
  display: inline-flex; align-items: center; gap: 8px;
}
.nav-brand .hash { color: var(--color-accent); font-weight: 800; }
.nav a { color: var(--color-neutral-400); text-decoration: none; font-size: 13.6px; font-weight: 500; letter-spacing: 0.02em; position: relative; transition: color 0.2s ease; }
.nav a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--color-accent); transition: width 0.2s ease;
}
.nav a:hover, .nav a[aria-current='page'], .nav a.current { color: var(--color-text); }
.nav a:hover::after, .nav a[aria-current='page']::after, .nav a.current::after { width: 100%; }
.nav-links { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.nav-cta {
  font-size: 13px !important; font-weight: 600 !important; color: #fff !important;
  background: var(--color-accent); padding: 8px 18px; border-radius: var(--radius-md);
  box-shadow: 0 0 20px var(--color-accent-glow); transition: all 0.2s ease !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--color-accent-400); box-shadow: 0 0 30px var(--color-accent-glow); transform: translateY(-1px); color: #fff !important; }
.nav-user-chip {
  font-size: 12.5px; color: var(--color-neutral-400); padding: 6px 14px;
  border: 1px solid var(--color-divider); border-radius: 999px; background: rgba(255,255,255,0.04);
  display: inline-flex; align-items: center; gap: 6px;
}
.nav-logout { color: var(--color-neutral-600) !important; font-size: 12.5px !important; }
.nav-logout::after { display: none !important; }
.nav-logout:hover { color: var(--color-danger) !important; }
.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 34px; height: 34px; background: none; border: none; cursor: pointer; padding: 0;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; transform-origin: center; }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .hamburger { display: flex; }
  .nav-links {
    display: flex; position: fixed; inset: 0;
    background: color-mix(in srgb, var(--color-bg) 97%, transparent);
    backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
    flex-direction: column; align-items: center; justify-content: center; gap: var(--space-6);
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
  }
  .nav-links.open { opacity: 1; pointer-events: auto; }
  .nav-links a, .nav-links .nav-user-chip { font-size: 18px; color: var(--color-text); }
  .nav-links .nav-cta { font-size: 16px !important; padding: 12px 28px; }
}

/* — tables — */
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th {
  text-align: left; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  padding: var(--space-3) var(--space-3); border-bottom: 1px solid var(--color-divider);
  white-space: nowrap;
}
.table td { padding: var(--space-3); border-bottom: 1px solid var(--color-divider); vertical-align: middle; }
.table tbody tr:hover { background: color-mix(in srgb, var(--color-text) 4%, transparent); }
.table tbody tr:last-child td { border-bottom: none; }
.table tr.row-flagged { background: color-mix(in srgb, var(--color-danger) 8%, transparent); }
.table tr.row-flagged:hover { background: color-mix(in srgb, var(--color-danger) 13%, transparent); }
.table tr.row-voided { opacity: 0.55; }
.table-responsive { width: 100%; overflow-x: auto; }

/* — dialog — */
.dialog-backdrop, dialog::backdrop {
  background: color-mix(in srgb, var(--color-neutral-900) 55%, transparent);
}
dialog {
  border: none; border-radius: var(--radius-lg); background: var(--color-surface);
  color: var(--color-text); box-shadow: var(--shadow-lg); padding: 0;
}
.dialog { width: min(440px, 100%); display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-4); }
.dialog-title { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 19px; }
.dialog-body { font-size: 14px; opacity: 0.85; }
.dialog-actions { display: flex; justify-content: flex-end; gap: var(--space-2); margin-top: var(--space-2); }

/* ══════════════════════════════════════════════════════════════════════
   Site-specific components
   ══════════════════════════════════════════════════════════════════ */

/* — hero — */
.hero { width: 100%; padding: var(--space-12) var(--space-4) var(--space-8); max-width: var(--content-max); margin: 0 auto; text-align: center; }
.hero h1 { max-width: 34ch; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; justify-content: center; gap: var(--space-2); margin-top: var(--space-4); flex-wrap: wrap; }
.hero-stats {
  display: flex; justify-content: center; width: 100%; gap: var(--space-8); padding: var(--space-4);
  border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
  flex-wrap: wrap; max-width: var(--content-max); margin: 0 auto;
}
.hero-stats .stat-block { text-align: center; align-items: center; }

/* — stat block (hero stats, profile stats, admin metrics) — */
.stat-block { display: flex; flex-direction: column; gap: 2px; }
.stat-block .stat-val { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: clamp(28px, 16px + 1.6vw, 48px); line-height: 1.1; }
.stat-block .stat-label { font-size: 14px; opacity: 0.7; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-3); }

/* — responsive 2-column grids — */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
@media (max-width: 480px) { .grid-2 { grid-template-columns: 1fr; } }
.grid-2-wide { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); width: 100%; }
@media (max-width: 760px) { .grid-2-wide { grid-template-columns: 1fr; } }

/* — progress / capacity bar — */
.bar { height: 6px; background: color-mix(in srgb, var(--color-text) 10%, transparent); border-radius: 3px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 999px; background: var(--color-accent); transition: width 0.6s ease; }
.bar-fill.almost { background: var(--color-warning); }
.bar-fill.full { background: var(--color-danger); }
.bar-label { display: flex; justify-content: space-between; font-size: 13px; opacity: 0.8; margin-bottom: 6px; }

/* — event cards — */
.event-card {
  display: flex; flex-direction: column; gap: var(--space-2);
  padding: var(--space-4); border-radius: var(--radius-lg); background: var(--color-surface);
  border: 1px solid var(--color-divider); text-decoration: none; color: var(--color-text);
  transition: border-color 0.15s ease;
}
.event-card:hover { border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-divider)); }
.event-card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-2); }
.event-date-badge {
  width: 52px; flex: none; text-align: center; padding: 6px 0;
  background: var(--color-bg); border: 1px solid var(--color-divider); border-radius: var(--radius-md);
}
.event-date-day { font-family: var(--font-heading); font-weight: 600; font-size: 18px; line-height: 1.1; }
.event-date-month { font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; opacity: 0.7; }
.event-card h2, .event-card h3 { font-size: 20px; margin: var(--space-1) 0 0; }
.event-card h2 a, .event-card h3 a { color: var(--color-text); text-decoration: none; }
.event-card h2 a:hover, .event-card h3 a:hover { color: var(--color-accent); }
.event-meta { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-3); margin-bottom: var(--space-4); flex: 1; }
.event-meta-item { display: flex; align-items: center; gap: 6px; font-size: 14px; opacity: 0.8; }
.event-meta-item svg { width: 13px; height: 13px; flex-shrink: 0; color: var(--color-accent); }
.event-card-footer { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); margin-top: auto; padding-top: var(--space-2); }
.events-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 520px)); justify-content: center; gap: var(--space-6); }

/* — breadcrumb / back link — */
.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--color-text); opacity: 0.7; text-decoration: none; margin-bottom: var(--space-4); }
.back-link:hover { opacity: 1; color: var(--color-accent); }

/* — empty state — */
.empty-state { text-align: center; padding: var(--space-12) var(--space-4); width: fit-content; max-width: 90vw; margin: 0 auto; }
.empty-state .empty-icon { font-size: clamp(34px, 24px + 1vw, 48px); margin-bottom: var(--space-3); }
.empty-state h3 { white-space: nowrap; }
.empty-state p { font-size: clamp(14px, 12px + 0.8vw, 18px); white-space: nowrap; }
@media (max-width: 640px) {
  .empty-state h3, .empty-state p { white-space: normal; }
}
.empty-state .btn { margin-top: var(--space-3); }

/* — avatar — */
.avatar {
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  border-radius: 50%; background: var(--color-accent-800); color: var(--color-accent-100);
  font-family: var(--font-heading); font-weight: 600;
}
.avatar-lg { width: 64px; height: 64px; font-size: 22px; }
.avatar-md { width: 44px; height: 44px; font-size: 16px; }

/* — auth / form pages — */
.form-page { flex: 1; display: flex; justify-content: center; align-items: flex-start; padding: var(--space-12) var(--space-4); }
.form-card { width: 100%; max-width: 420px; background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); padding: var(--space-6); }
.form-logo { font-family: var(--font-heading); font-weight: 600; font-size: 15px; color: var(--color-accent); margin-bottom: var(--space-4); display: flex; align-items: center; gap: 2px; }
.form-logo .hash { color: var(--color-accent-2); }
.form-title { font-size: 24px; margin-bottom: 4px; }
.form-subtitle { font-size: 13.5px; opacity: 0.7; margin-bottom: var(--space-5); }
.form-submit { width: 100%; margin-top: var(--space-2); }
.form-footer { text-align: center; font-size: 13px; margin-top: var(--space-4); opacity: 0.85; }
.social-divider { display: flex; align-items: center; gap: var(--space-2); margin: var(--space-4) 0; color: var(--color-text); opacity: 0.5; font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; }
.social-divider::before, .social-divider::after { content: ''; flex: 1; height: 1px; background: var(--color-divider); }
.btn-google {
  display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%;
  padding: 9px 16px; background: #fff; color: #3c4043; border: 1px solid #dadce0;
  border-radius: var(--radius-md); font-size: 14px; font-weight: 500; font-family: inherit;
  cursor: pointer; text-decoration: none; transition: box-shadow 0.15s ease;
}
.btn-google:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.btn-google svg { width: 18px; height: 18px; flex-shrink: 0; }
.notice {
  display: flex; align-items: flex-start; gap: var(--space-2);
  background: color-mix(in srgb, var(--color-warning) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-warning) 40%, transparent);
  border-left: 3px solid var(--color-warning);
  border-radius: var(--radius-md); padding: var(--space-3); font-size: 12.5px;
}
.notice strong { color: var(--color-text); }

/* — flash messages — */
.messages-container { position: fixed; top: var(--space-4); right: var(--space-4); z-index: 1000; display: flex; flex-direction: column; gap: var(--space-2); max-width: 360px; }
.message {
  display: flex; align-items: flex-start; gap: var(--space-2);
  background: var(--color-surface); border: 1px solid var(--color-divider);
  border-radius: var(--radius-md); padding: var(--space-3); font-size: 13.5px;
  box-shadow: var(--shadow-md); position: relative;
}
.message-success { border-left: 3px solid var(--color-success); }
.message-error { border-left: 3px solid var(--color-danger); }
.message-warning { border-left: 3px solid var(--color-warning); }
.message-info { border-left: 3px solid var(--color-accent); }
.message-close { margin-left: auto; background: none; border: none; color: var(--color-text); opacity: 0.5; cursor: pointer; font-size: 13px; padding: 0 0 0 var(--space-2); }
.message-close:hover { opacity: 1; }

/* — sidebar layout (admin) — */
.layout-sidebar { display: grid; width: 100%; grid-template-columns: 220px 1fr; gap: var(--space-6); padding: var(--space-6) var(--space-4) var(--space-10); max-width: var(--content-max); margin: 0 auto; }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; height: fit-content; position: sticky; top: 76px; }
@media (max-width: 900px) {
  .layout-sidebar { grid-template-columns: 1fr; }
  .sidebar-nav { position: static; flex-direction: row; flex-wrap: wrap; gap: var(--space-2); }
  .sidebar-nav-title { width: 100%; }
}
.sidebar-nav-title { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.55; margin-bottom: var(--space-2); padding: 0 var(--space-2); }
.sidebar-link {
  display: flex; align-items: center; gap: var(--space-2); padding: 9px var(--space-2);
  border-radius: var(--radius-md); color: var(--color-text); opacity: 0.75; text-decoration: none; font-size: 14px;
}
.sidebar-link svg { width: 16px; height: 16px; flex-shrink: 0; }
.sidebar-link:hover { background: color-mix(in srgb, var(--color-text) 6%, transparent); opacity: 1; }
.sidebar-link.active { background: color-mix(in srgb, var(--color-accent) 14%, transparent); color: var(--color-accent); opacity: 1; }
.admin-panel { display: flex; flex-direction: column; gap: var(--space-6); min-width: 0; }
.admin-header { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-divider); }
.admin-header p { margin: 4px 0 0; }
.flex-actions { display: flex; gap: var(--space-2); align-items: center; flex-wrap: wrap; }
.inline-form { display: inline-block; }
.search-bar-wrap { display: flex; gap: var(--space-2); margin-bottom: var(--space-4); flex-wrap: wrap; }
.list-row { display: flex; align-items: center; justify-content: space-between; padding: var(--space-2) 0; border-bottom: 1px solid var(--color-divider); gap: var(--space-3); }
.list-row:last-child { border-bottom: none; }

/* — footer — */
.footer { border-top: 1px solid var(--color-divider); padding: var(--space-8) var(--space-4); margin-top: auto; }
.footer-inner { max-width: var(--content-max); margin: 0 auto; display: flex; justify-content: space-between; gap: var(--space-6); flex-wrap: wrap; }
.footer-brand p { max-width: 44ch; font-size: 13px; opacity: 0.65; margin-top: var(--space-2); }
.footer-logo { font-family: var(--font-heading); font-weight: 600; font-size: 15px; }
.footer-logo .hash { color: var(--color-accent); }
.footer-links { display: flex; gap: var(--space-8); flex-wrap: wrap; }
.footer-col h5 { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; opacity: 0.55; margin-bottom: var(--space-2); }
.footer-col a { display: block; font-size: 13.5px; opacity: 0.75; text-decoration: none; margin-bottom: 6px; }
.footer-col a:hover { opacity: 1; color: var(--color-accent); }
.footer-bottom { max-width: var(--content-max); margin: var(--space-6) auto 0; padding-top: var(--space-4); border-top: 1px solid var(--color-divider); font-size: 12px; opacity: 0.5; }

/* — misc utility — */
.back-to-top {
  position: fixed; bottom: var(--space-4); right: var(--space-4); width: 40px; height: 40px;
  border-radius: 50%; border: 1px solid var(--color-divider); background: var(--color-surface);
  color: var(--color-text); cursor: pointer; opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
  font-size: 16px; display: flex; align-items: center; justify-content: center; z-index: 200;
}
.back-to-top.visible { opacity: 0.85; pointer-events: auto; }
.back-to-top:hover { opacity: 1; }

/* — responsive layout utilities — */
.event-detail-layout {
  display: flex; gap: var(--space-8);
}

@media (max-width: 768px) {
  .hero { padding: var(--space-8) var(--space-4) var(--space-6); }
  .hero-stats { gap: var(--space-4); padding: var(--space-4) 0; }
  
  .event-detail-layout {
    flex-direction: column-reverse;
    gap: var(--space-6);
  }

  /* Make RSVP sticky on mobile */
  .event-detail-sidebar {
    position: sticky;
    bottom: 0;
    z-index: 90;
    margin-inline: calc(var(--space-4) * -1);
    background: var(--color-bg);
    padding: var(--space-4);
    border-top: 1px solid var(--color-divider);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.5);
  }
}