/* public/assets/ui.css — unified modern UI + auto & manual dark mode */

/* Load Inter from our local font file so it's available before any SVG renders */
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* --- THEME TOKENS (LIGHT) --- */
:root {
  --bg: #ffffff;          /* page background (light mode) */
  --bg-soft: #020617;
  --card: #ffffff;
  --card-soft: #f9fafb;
  --ring: #e5e7eb;
  --ring-strong: #cbd5f5;
  --text: #0f172a;
  --muted: #64748b;

  /* ACCENT → Fluent blue */
  --accent: #3b82f6;
  --accent-soft: #e8f0ff;

  --error: #dc2626;
  --error-soft: #fee2e2;

  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 20px;

  --shadow: 0 14px 45px rgba(15, 23, 42, 0.24);
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.18);
  --shadow-hover: 0 18px 56px rgba(15, 23, 42, 0.32);

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

  --font-sans: system-ui, -apple-system, "Inter", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --t-fast: 120ms cubic-bezier(.2,.8,.2,1);
  --t: 160ms cubic-bezier(.2,.8,.2,1);
}

/* --- DARK (auto via OS) --- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #020617;
    --bg-soft: #00010b;
    --card: #020617;
    --card-soft: #020617;
    --ring: #1f2937;
    --ring-strong: #334155;
    --text: #e5e7eb;
    --muted: #9ca3af;

    --accent: #60a5fa;
    --accent-soft: #0b2347;

    --error: #fca5a5;
    --error-soft: #7f1d1d;

    --shadow: 0 18px 56px rgba(0,0,0,0.55);
    --shadow-soft: 0 14px 40px rgba(0,0,0,0.45);
    --shadow-hover: 0 22px 70px rgba(0,0,0,0.75);
  }

  /* Auto dark-mode treatment for white-background logo (header + legacy brand) */
  .brand-logo,
  .ct-brand-logo {
    filter: invert(1) brightness(1.4) contrast(1.1);
  }
}

/* --- MANUAL OVERRIDE (theme.js toggles data-theme) --- */
:root[data-theme="light"] { color-scheme: light; }

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #020617;
  --bg-soft: #00010b;
  --card: #020617;
  --card-soft: #020617;
  --ring: #1f2937;
  --ring-strong: #334155;
  --text: #e5e7eb;
  --muted: #9ca3af;

  --accent: #60a5fa;
  --accent-soft: #0b2347;

  --error: #fca5a5;
  --error-soft: #7f1d1d;

  --shadow: 0 18px 56px rgba(0,0,0,0.55);
  --shadow-soft: 0 14px 40px rgba(0,0,0,0.45);
  --shadow-hover: 0 22px 70px rgba(0,0,0,0.75);
}

/* Manual dark-mode treatment when toggle forces data-theme="dark" */
:root[data-theme="dark"] .brand-logo,
:root[data-theme="dark"] .ct-brand-logo {
  filter: invert(1) brightness(1.4) contrast(1.1);
}

/* --- BASE PAGE LAYOUT --- */
html,
body {
  height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(59,130,246,0.18), transparent 55%),
    radial-gradient(circle at bottom right, rgba(79,70,229,0.18), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition:
    background-color var(--t),
    color var(--t),
    background-image var(--t);
}

/* --- TOP BAR / GLOBAL HEADER --- */
.ct-topbar {
  position: relative;
  z-index: 40;
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
  background: var(--card); /* white in light mode, dark card in dark mode */
}

/* Align with main shell width, center logo */
.ct-topbar-inner {
  max-width: clamp(640px, 92vw, 960px);
  margin: 0 auto;
  padding: 10px var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center; /* center logo */
  gap: var(--space-3);
  position: relative;      /* anchor nav / hamburger */
}

/* Brand lockup in header (logo only) */
.ct-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: inherit;
}

.ct-brand-logo {
  display: block;
  height: 56px;  /* substantially bigger header logo */
  width: auto;
}

/* Desktop nav */
.ct-nav {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  position: absolute;
  right: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
}

.ct-nav a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    color var(--t),
    background-color var(--t),
    border-color var(--t),
    transform var(--t-fast);
}

.ct-nav a:hover {
  color: var(--accent);
  background: rgba(15, 23, 42, 0.03);
  border-color: rgba(148, 163, 184, 0.5);
  transform: translateY(-1px);
}

/* Hamburger toggle (overrides global button styles) */
.ct-nav-toggle {
  display: none; /* shown on mobile via media query */
  position: absolute;
  right: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  width: auto;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--ring);
  background: transparent;
  color: var(--text);
  box-shadow: none;
  cursor: pointer;
  justify-content: center;
  align-items: center;
  flex-direction: column; /* stack bars vertically */
  gap: 3px;
}

.ct-nav-toggle:hover {
  box-shadow: var(--shadow-soft);
  background: rgba(15, 23, 42, 0.03);
  transform: translateY(-50%);
}

.ct-nav-toggle:active {
  box-shadow: none;
}

.ct-nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

/* Mobile slide-down menu (closed by default; opened via html.ct-nav-open in theme.js) */
.ct-nav-menu {
  display: none;
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
  background: var(--card);
}

.ct-nav-menu a {
  display: block;
  max-width: clamp(640px, 92vw, 960px);
  margin: 0 auto;
  padding: 10px var(--space-5);
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  border-top: 1px solid rgba(226, 232, 240, 0.9);
  transition:
    color var(--t),
    background-color var(--t);
}

.ct-nav-menu a:hover {
  color: var(--accent);
  background: rgba(15, 23, 42, 0.03);
}

/* --- MAIN SHELL --- */
/* Shared shell for home + admin + activity */
main {
  max-width: clamp(640px, 92vw, 960px);
  margin: var(--space-4) auto var(--space-6);
  padding: var(--space-4) var(--space-5) var(--space-5);
  background:
    radial-gradient(circle at top left, rgba(148,163,184,0.06), transparent 55%),
    var(--card);
  border-radius: 28px;
  box-shadow: var(--shadow-soft);
  transition:
    background-color var(--t),
    box-shadow var(--t),
    transform var(--t-fast);
}

/* Attach main shell directly to header when present (no gap, squared top) */
.ct-topbar + main {
  margin-top: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

/* NEW: participant / activity pages can tag <body class="ct-activity">
   to visually match organizer pages (no top gap, squared top corners) */
body.ct-activity main {
  margin-top: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

/* Keep Slot admin / others that override main fully compatible */
body > main {
  box-sizing: border-box;
}

/* --- TYPOGRAPHY --- */
h1 {
  margin: 0 0 var(--space-3) 0;
  font-weight: 680;
  letter-spacing: -0.02em;
  font-size: clamp(1.8rem, 2.2vw + 1.4rem, 2.4rem);
  display: flex;
  align-items: center;
  gap: 10px;
}

h1 .eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

h2,
h3 {
  margin: var(--space-4) 0 var(--space-2) 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.15rem;
}

h3 {
  font-size: 1.02rem;
}

p {
  margin: 0 0 var(--space-4) 0;
}

small,
.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Utility stacks */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.stack-tight {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Simple 2-column responsive grid used by tool forms (e.g., Sheet rows/cols) */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

/* --- HOME / TOOL LIST --- */
ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

/* Home card grid (.tool-list is used in index.html) */
.tool-list {
  display: grid;
  gap: 12px;
}

a.tool {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--ring);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  background:
    linear-gradient(135deg, rgba(148,163,184,0.06), transparent),
    var(--card-soft);
  transition:
    transform var(--t),
    box-shadow var(--t),
    border-color var(--t),
    background-color var(--t),
    background-image var(--t);
}

a.tool:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
  border-color: var(--ring-strong);
}

a.tool:active {
  transform: translateY(0);
  box-shadow: var(--shadow-soft);
}

.emoji {
  font-size: 22px;
}

/* Brand lockup on home (legacy, still supported) */
/* NOTE: this now only controls non-header logos so it
   no longer shrinks the top bar logo back down */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 var(--space-2) 0;
}

.brand-logo {
  display: block;
  height: 32px;
  width: auto;
}

/* Centered intro copy on home (used by index.html) */
.logo {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 0.5rem;
}

.logo img {
  max-width: 220px;
  height: auto;
  display: block;
}

.intro-centered {
  text-align: center;
  max-width: 480px;
  margin: 0 auto 1.25rem;
  display: block;
}

/* --- ADMIN / ACTIVITY SHELL HELPERS --- */
.page-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: var(--space-4);
}

.page-header-title {
  font-size: clamp(1.7rem, 2vw + 1.2rem, 2.1rem);
  font-weight: 680;
  letter-spacing: -0.02em;
}

.page-header-subtitle {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Subsections on admin pages */
.section-card {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--ring);
  background:
    linear-gradient(135deg, rgba(148,163,184,0.06), transparent),
    var(--card-soft);
}

/* --- FORMS (unified layout) --- */
form {
  margin-top: var(--space-2);
}

/* Labels wrap the input (Slot admin already uses this pattern) */
label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 10px 0;
  font-size: 0.95rem;
  color: var(--text);
}

label small {
  font-size: 0.85rem;
}

/* Inputs & selects */
input,
textarea,
select,
button {
  font-family: var(--font-sans);
  font-size: 16px;
  border-radius: 11px;
  border: 1px solid var(--ring);
  background: var(--card);
  color: var(--text);
  box-sizing: border-box;
  transition:
    background-color var(--t),
    color var(--t),
    border-color var(--t),
    box-shadow var(--t),
    transform var(--t-fast);
}

input,
textarea,
select {
  padding: 9px 11px;
  width: 100%;
}

textarea {
  min-height: 80px;
  resize: vertical;
}

/* Focus ring */
input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 70%, var(--ring));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent);
}

/* Checkbox fix for iOS Safari */
input[type="checkbox"] {
  width: auto !important;
  height: auto;
  margin: 0 8px 0 0;
  padding: 0;
  border: none;
  display: inline-block;
  vertical-align: middle;
  box-shadow: none;
}

/* --- BUTTONS (primary / subtle / danger) --- */
button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 999px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 540;
  white-space: nowrap;
  width: 100%;
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.40);
}

button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-soft);
}

button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

/* Explicit utility classes you can adopt over time; existing inline styles still work */
.btn-primary {
  background: var(--accent);
  color: #fff;
}

/* Compact primary pill — ideal for Copy buttons next to inputs */
.btn-primary-compact {
  background: var(--accent);
  color: #fff;
  width: auto;
  padding: 7px 12px;
  font-size: 0.9rem;
  box-shadow: 0 8px 22px rgba(37, 99, 235, 0.35);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--ring);
  color: var(--text);
  box-shadow: none;
}

.btn-ghost:hover {
  border-color: var(--ring-strong);
  box-shadow: var(--shadow-soft);
}

.btn-danger {
  background: var(--error);
  color: #fff;
  box-shadow: 0 10px 30px rgba(220, 38, 38, 0.35);
}

.btn-danger:hover {
  box-shadow: 0 14px 40px rgba(220, 38, 38, 0.45);
}

/* Button rows on admin pages */
.btn-row {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.btn-row > button {
  flex: 1 1 0;
}

/* --- SMALL UTILITIES --- */
.hidden {
  display: none;
}

/* Pills / chips (attendees, metadata) */
.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--ring);
  margin-right: 6px;
  margin-bottom: 6px;
  font-size: 0.95rem;
  background: var(--card);
}

/* Preview wrappers for OG images (used in multiple pages) */
.previewWrap {
  border: 1px solid var(--ring);
  border-radius: 16px;
  overflow: hidden;
  background: var(--card);
}

.previewWrap img {
  display: block;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

/* Hide noisy preview version label everywhere (JS still updates it harmlessly) */
#previewMeta {
  display: none !important;
}

/* Common HR styling used on tool pages */
hr {
  margin: 18px 0;
  border: none;
  border-top: 1px solid var(--ring);
}

/* Inline help / footnotes */
.note {
  font-size: 0.82rem;
  color: var(--muted);
}

/* --- THEME TOGGLE (wired by theme.js) --- */
.theme-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 50;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--ring);
  background: var(--card);
  color: var(--text);
  box-shadow: var(--shadow);
  width: auto;
  font-size: 0.9rem;
}

.theme-toggle:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

/* --- RESPONSIVE TUNING --- */
@media (max-width: 768px) {
  /* Show hamburger, hide desktop nav */
  .ct-nav {
    display: none;
  }

  .ct-nav-toggle {
    display: inline-flex;
  }

  /* Mobile slide-down menu toggle (html.ct-nav-open is added by theme.js) */
  html.ct-nav-open .ct-nav-menu {
    display: block;
  }
}

@media (max-width: 640px) {
  main {
    margin-top: var(--space-2);
    margin-bottom: var(--space-5);
    padding-top: var(--space-3);
    padding-bottom: var(--space-4);
    padding-inline: var(--space-4);
    border-radius: 22px;
  }

  /* When header is present on mobile, still attach main directly to it */
  .ct-topbar + main {
    margin-top: 0;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
  }

  h1 {
    margin-bottom: var(--space-2);
  }

  p {
    margin-bottom: var(--space-3);
  }

  .btn-row {
    flex-direction: column;
  }

  .theme-toggle {
    right: 14px;
    bottom: 14px;
  }

  /* Stack 2-column helper on small screens */
  .grid-2 {
    grid-template-columns: 1fr;
  }
}