/* ═══════════════════════════════════════════════════════════
   Weighted Decision Matrix — Ocean Sorbet Theme
   ═══════════════════════════════════════════════════════════ */

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

/* ── Light Theme (Ocean Sorbet) ───────────────────────────── */
:root {
  --bg:                 #F2E9E9;
  --orb-1:              rgba(70, 101, 140, 0.20);
  --orb-2:              rgba(217, 137, 91, 0.16);
  --surface:            rgba(255, 255, 255, 0.52);
  --surface-hover:      rgba(255, 255, 255, 0.70);
  --surface-border:     rgba(191, 173, 168, 0.28);
  --surface-highlight:  rgba(255, 255, 255, 0.85);
  --surface-shadow:     0 8px 32px rgba(70, 101, 140, 0.07);
  --text:               #2D2D2D;
  --text-muted:         #7d706c;
  --accent-1:           #46658C;
  --accent-2:           #4A6D8C;
  --accent-warm:        #D9895B;
  --accent-grad:        linear-gradient(135deg, #46658C, #4A6D8C);
  --accent-warm-grad:   linear-gradient(135deg, #D9895B, #e09d75);
  --accent-glow:        rgba(70, 101, 140, 0.22);
  --accent-warm-glow:   rgba(217, 137, 91, 0.22);
  --input-bg:           rgba(255, 255, 255, 0.48);
  --input-border:       rgba(191, 173, 168, 0.32);
  --input-focus:        rgba(70, 101, 140, 0.50);
  --input-focus-glow:   rgba(70, 101, 140, 0.12);
  --danger:             #b94040;
  --danger-bg:          rgba(185, 64, 64, 0.08);
  --bar-bg:             rgba(70, 101, 140, 0.10);
  --bar-grad:           linear-gradient(135deg, #46658C, #4A6D8C);
  --gold-grad:          linear-gradient(135deg, #D9895B, #e5a878, #D9895B);
  --sticky-bg:          rgba(242, 233, 233, 0.97);
  --toggle-bg:          rgba(0, 0, 0, 0.06);
  --toggle-knob:        #fff;
  --sidebar-bg:         rgba(255, 255, 255, 0.38);
  --sidebar-border:     rgba(191, 173, 168, 0.22);
  --sidebar-active:     rgba(70, 101, 140, 0.10);
  --sidebar-active-bar: #D9895B;
  --radius:             14px;
  --radius-sm:          8px;
  --blur:               24px;
  --transition:         0.25s ease;
  --transition-theme:   0.4s ease;
}

/* ── Dark Theme ───────────────────────────────────────────── */
[data-theme="dark"] {
  --bg:                 #131a26;
  --orb-1:              rgba(70, 101, 140, 0.16);
  --orb-2:              rgba(217, 137, 91, 0.09);
  --surface:            rgba(255, 255, 255, 0.04);
  --surface-hover:      rgba(255, 255, 255, 0.065);
  --surface-border:     rgba(255, 255, 255, 0.07);
  --surface-highlight:  rgba(255, 255, 255, 0.12);
  --surface-shadow:     0 8px 32px rgba(0, 0, 0, 0.32);
  --text:               #F2E9E9;
  --text-muted:         #BFADA8;
  --accent-1:           #6d90b8;
  --accent-2:           #7c9ec4;
  --accent-warm:        #D9895B;
  --accent-grad:        linear-gradient(135deg, #6d90b8, #7c9ec4);
  --accent-warm-grad:   linear-gradient(135deg, #D9895B, #e5a070);
  --accent-glow:        rgba(109, 144, 184, 0.26);
  --accent-warm-glow:   rgba(217, 137, 91, 0.26);
  --input-bg:           rgba(255, 255, 255, 0.05);
  --input-border:       rgba(255, 255, 255, 0.08);
  --input-focus:        rgba(109, 144, 184, 0.50);
  --input-focus-glow:   rgba(109, 144, 184, 0.14);
  --danger:             #e06060;
  --danger-bg:          rgba(224, 96, 96, 0.10);
  --bar-bg:             rgba(109, 144, 184, 0.12);
  --bar-grad:           linear-gradient(135deg, #6d90b8, #7c9ec4);
  --gold-grad:          linear-gradient(135deg, #D9895B, #e5a878, #D9895B);
  --sticky-bg:          rgba(19, 26, 38, 0.97);
  --toggle-bg:          rgba(255, 255, 255, 0.10);
  --toggle-knob:        #1c2333;
  --sidebar-bg:         rgba(255, 255, 255, 0.025);
  --sidebar-border:     rgba(255, 255, 255, 0.06);
  --sidebar-active:     rgba(109, 144, 184, 0.14);
  --sidebar-active-bar: #D9895B;
}

/* ── Base ──────────────────────────────────────────────────── */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background var(--transition-theme), color var(--transition-theme);
}

body.sidebar-open { overflow: hidden; }

/* ── Ambient Orbs ──────────────────────────────────────────── */
body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: -1;
  transition: background var(--transition-theme);
}

body::before {
  width: 55vw; height: 55vw;
  max-width: 700px; max-height: 700px;
  top: -18%; left: -12%;
  background: radial-gradient(circle, var(--orb-1) 0%, transparent 70%);
  filter: blur(60px);
}

body::after {
  width: 50vw; height: 50vw;
  max-width: 650px; max-height: 650px;
  bottom: -15%; right: -10%;
  background: radial-gradient(circle, var(--orb-2) 0%, transparent 70%);
  filter: blur(60px);
}

/* ── Scrollbar (dark) ──────────────────────────────────────── */
[data-theme="dark"] ::-webkit-scrollbar { width: 5px; height: 5px; }
[data-theme="dark"] ::-webkit-scrollbar-track { background: transparent; }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.10); border-radius: 3px; }

::selection { background: var(--accent-1); color: #fff; }

/* ═══════════════════════════════════════════════════════════
   App Layout — Sidebar + Main
   ═══════════════════════════════════════════════════════════ */
.app-layout {
  display: flex;
  width: 100%;
  min-height: 100dvh;
}

/* ── Sidebar ───────────────────────────────────────────────── */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  height: 100dvh;
  position: sticky;
  top: 0;
  background: var(--sidebar-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  padding: 1.1rem 0.85rem;
  overflow: hidden;
  white-space: nowrap;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              padding 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease,
              border-color var(--transition-theme),
              background var(--transition-theme);
}

.sidebar.collapsed {
  width: 0;
  padding-left: 0;
  padding-right: 0;
  border-right-width: 0;
  border-right-color: transparent;
  opacity: 0;
  pointer-events: none;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.85rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--surface-border);
  gap: 0.4rem;
}

.sidebar-header-main {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.btn-sidebar-collapse {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.btn-sidebar-collapse:hover {
  background: var(--surface-hover);
  color: var(--text);
  transform: scale(1.05);
}

.btn-sidebar-collapse svg {
  width: 14px;
  height: 14px;
}

.sidebar-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.btn-new {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent-warm-grad);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 2px 10px var(--accent-warm-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.btn-new:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 18px var(--accent-warm-glow);
}

.btn-new:active { transform: scale(0.96); }

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.sidebar-item {
  display: flex;
  align-items: center;
  padding: 0.6rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
  border-left: 3px solid transparent;
}

.sidebar-item:hover { background: var(--surface-hover); }

.sidebar-item.active {
  background: var(--sidebar-active);
  border-left-color: var(--sidebar-active-bar);
}

.sidebar-item-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.84rem;
  color: var(--text);
}

.sidebar-item.active .sidebar-item-title { font-weight: 600; }

.sidebar-item-delete {
  flex-shrink: 0;
  width: 1.4rem;
  height: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  opacity: 0.35;
  transition: opacity var(--transition), background var(--transition), color var(--transition);
}

.sidebar-item:hover .sidebar-item-delete,
.sidebar-item-delete:focus { opacity: 1; }

.sidebar-item-delete:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 99;
}

.sidebar-overlay.open { display: block; }

/* ── Main Wrapper ──────────────────────────────────────────── */
.main-wrapper {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.1rem 1.75rem 0;
}

.main-wrapper > * {
  width: 100%;
  max-width: 960px;
}

/* Hide duplicate header menu button when sidebar is open on desktop */
@media (min-width: 769px) {
  .sidebar:not(.collapsed) + .main-wrapper .menu-toggle,
  .sidebar:not(.collapsed) + .main-wrapper .hamburger {
    display: none !important;
  }
}

/* ── App Header ────────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 0.75rem;
  position: relative;
  min-height: 42px;
}

.brand-container {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 50;
  outline: none;
}

.brand-title {
  font-family: "Black Ops One", cursive, sans-serif;
  font-size: 1.65rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: #D9895B;
  white-space: nowrap;
  margin: 0;
  transition: transform var(--transition), filter var(--transition);
  user-select: none;
  -webkit-user-select: none;
}

.brand-container:hover .brand-title,
.brand-container:focus .brand-title,
.brand-container.active .brand-title {
  transform: scale(1.03);
  filter: drop-shadow(0 2px 10px var(--accent-warm-glow));
}

/* Definition mini popup */
.brand-tooltip {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  width: 320px;
  max-width: calc(100vw - 32px);
  background: var(--surface);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28), 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 0.9rem 1.1rem 1rem;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.2s;
  z-index: 100;
  text-align: left;
}

.brand-tooltip::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--surface-highlight), transparent);
  pointer-events: none;
}

.brand-container:hover .brand-tooltip,
.brand-container:focus-within .brand-tooltip,
.brand-container.active .brand-tooltip {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.tooltip-arrow {
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 11px;
  height: 11px;
  background: var(--surface);
  border-top: 1px solid var(--surface-border);
  border-left: 1px solid var(--surface-border);
}

.tooltip-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--surface-border);
}

.tooltip-term {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.tooltip-phonetic {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.tooltip-badge {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: var(--bar-bg);
  color: var(--accent-1);
}

.tooltip-text {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text);
  margin: 0;
  text-align: left;
}

.highlight-def {
  background: #203da0;
  color: #ffffff;
  font-weight: 500;
  padding: 0.12rem 0.42rem;
  border-radius: 4px;
  display: inline;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

[data-theme="dark"] .highlight-def {
  background: #203da0;
  color: #ffffff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
  margin-left: auto;
}

/* Menu Toggle (desktop and mobile) */
.menu-toggle,
.hamburger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
}

.menu-toggle:hover,
.hamburger:hover {
  background: var(--surface-hover);
  color: var(--text);
  box-shadow: 0 2px 10px var(--accent-glow);
  transform: translateY(-1px);
}

.menu-toggle svg,
.hamburger svg { width: 18px; height: 18px; }

/* Icon buttons (help, theme) */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
}

.btn-icon:hover {
  background: var(--surface-hover);
  color: var(--text);
  box-shadow: 0 2px 10px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-icon svg { width: 16px; height: 16px; }

/* ── Theme Toggle ──────────────────────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  width: 48px;
  height: 26px;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  background: var(--toggle-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
  padding: 2px;
  transition: background var(--transition);
}

.theme-toggle:hover { background: var(--surface-hover); }

.toggle-knob {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--toggle-knob);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), background var(--transition);
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}

[data-theme="dark"] .toggle-knob {
  transform: translateX(22px);
  background: var(--accent-1);
}

.toggle-knob svg { width: 12px; height: 12px; }

.icon-sun  { display: block; color: #c88a30; }
.icon-moon { display: none; }

[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; color: #F2E9E9; }

/* ═══════════════════════════════════════════════════════════
   Glass Cards
   ═══════════════════════════════════════════════════════════ */
.card {
  position: relative;
  background: var(--surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  box-shadow: var(--surface-shadow);
  padding: 1.25rem;
  margin-bottom: 0.85rem;
  transition: background var(--transition-theme),
              border-color var(--transition-theme),
              box-shadow var(--transition-theme);
}

.card::before {
  content: "";
  position: absolute;
  top: 0; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--surface-highlight), transparent);
  pointer-events: none;
  border-radius: 1px;
}

.card-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}

.card-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.7rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.card-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 0.1rem;
  margin-bottom: 0.5rem;
}

/* ═══════════════════════════════════════════════════════════
   Inputs
   ═══════════════════════════════════════════════════════════ */
.decision-title-input {
  width: 100%;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.6rem 0.8rem;
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  background: var(--input-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition),
              background var(--transition-theme), color var(--transition-theme);
}

.decision-title-input:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px var(--input-focus-glow);
}

.decision-title-input::placeholder { color: var(--text-muted); font-weight: 400; }

/* ── Item Lists ───────────────────────────────────────────── */
.item-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.item-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.item-row input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 0.48rem 0.6rem;
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 0.87rem;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color var(--transition), box-shadow var(--transition),
              background var(--transition-theme), color var(--transition-theme);
}

.item-row input[type="text"]:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px var(--input-focus-glow);
}

.weight-control {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
}

.weight-control input[type="range"] {
  width: 64px;
  accent-color: var(--accent-warm);
  cursor: pointer;
}

.weight-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 999px;
  background: var(--accent-warm-grad);
  color: #fff;
}

.btn-remove {
  flex-shrink: 0;
  width: 1.6rem;
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 6px;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), color var(--transition);
  line-height: 1;
}

.btn-remove:hover { background: var(--danger); color: #fff; transform: scale(1.08); }

/* ═══════════════════════════════════════════════════════════
   Buttons
   ═══════════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.48rem 0.95rem;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition), color var(--transition);
  position: relative;
}

.btn:active { transform: scale(0.96); }

.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--accent-1);
  border: 1.5px solid var(--accent-1);
}

.btn-outline:hover {
  background: var(--surface-hover);
  box-shadow: 0 2px 10px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-danger-outline {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--danger);
  border: 1.5px solid var(--danger);
}

.btn-danger-outline:hover { background: var(--danger-bg); transform: translateY(-1px); }

.btn-sm { padding: 0.38rem 0.75rem; font-size: 0.76rem; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.65rem;
}

/* ═══════════════════════════════════════════════════════════
   Math Toggle
   ═══════════════════════════════════════════════════════════ */
.math-toggle {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  font-size: 0.73rem;
  font-weight: 500;
  color: var(--text-muted);
  user-select: none;
  -webkit-user-select: none;
}

.math-toggle input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 32px;
  height: 17px;
  border-radius: 999px;
  background: var(--toggle-bg);
  position: relative;
  cursor: pointer;
  transition: background var(--transition);
  flex-shrink: 0;
}

.math-toggle input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background var(--transition);
}

.math-toggle input[type="checkbox"]:checked { background: var(--accent-warm-grad); }
.math-toggle input[type="checkbox"]:checked::after { transform: translateX(15px); background: #fff; }

/* ═══════════════════════════════════════════════════════════
   Scoring Grid
   ═══════════════════════════════════════════════════════════ */
.grid-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -1.25rem;
  padding: 0 1.25rem 0.2rem;
}

.scoring-grid {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.83rem;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--surface-border);
}

.scoring-grid th,
.scoring-grid td {
  padding: 0.5rem 0.55rem;
  text-align: center;
  white-space: nowrap;
  border-bottom: 1px solid var(--surface-border);
}

.scoring-grid thead th {
  position: sticky; top: 0;
  background: var(--sticky-bg);
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  z-index: 2;
}

.scoring-grid thead th .weight-label {
  display: block;
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--accent-warm);
  text-transform: none;
  letter-spacing: 0;
}

.scoring-grid thead th:first-child { text-align: left; position: sticky; left: 0; z-index: 3; }

.scoring-grid tbody td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text);
  position: sticky; left: 0;
  background: var(--sticky-bg);
  z-index: 1;
  min-width: 90px;
}

.score-input {
  width: 50px;
  padding: 0.3rem 0.2rem;
  text-align: center;
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 0.87rem;
  font-weight: 600;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color var(--transition), box-shadow var(--transition),
              background var(--transition-theme), color var(--transition-theme);
}

.score-input:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px var(--input-focus-glow);
}

.score-input::-webkit-inner-spin-button,
.score-input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.score-input { -moz-appearance: textfield; }

.empty-state {
  text-align: center;
  padding: 1.75rem 1rem;
  color: var(--text-muted);
  font-size: 0.87rem;
}

/* ═══════════════════════════════════════════════════════════
   Results
   ═══════════════════════════════════════════════════════════ */
.results-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.result-item { display: flex; flex-direction: column; gap: 0.3rem; }

.result-header { display: flex; justify-content: space-between; align-items: baseline; }

.result-rank {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-right: 0.35rem;
}

.result-rank.gold {
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 0.78rem;
}

.result-name { font-weight: 600; font-size: 0.93rem; }

.result-score {
  font-weight: 700;
  font-size: 0.93rem;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.result-bar-track {
  height: 9px;
  background: var(--bar-bg);
  border-radius: 999px;
  overflow: hidden;
}

.result-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--bar-grad);
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.result-item:first-child .result-bar-fill { background: var(--gold-grad); }

.result-breakdown {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.05rem;
  display: none;
}

.results-show-math .result-breakdown { display: block; }

/* ═══════════════════════════════════════════════════════════
   Actions Bar
   ═══════════════════════════════════════════════════════════ */
.actions-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: center;
  margin-top: 0.35rem;
  margin-bottom: 1.25rem;
}

#import-input { display: none; }

/* ═══════════════════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════════════════ */
.app-footer {
  text-align: center;
  padding: 1.25rem 1rem 1.75rem;
  display: flex;
  justify-content: center;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--surface-border);
  font-size: 0.78rem;
  font-weight: 500;
  transition: color var(--transition), background var(--transition),
              box-shadow var(--transition), transform var(--transition);
}

.footer-link:hover {
  color: var(--accent-warm);
  box-shadow: 0 2px 12px var(--accent-warm-glow);
  transform: translateY(-1px);
}

.footer-link svg { width: 15px; height: 15px; flex-shrink: 0; }

/* ═══════════════════════════════════════════════════════════
   Instructions Modal
   ═══════════════════════════════════════════════════════════ */
.instructions-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.instructions-overlay.open { display: flex; }

.instructions-panel {
  background: var(--surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.22);
  padding: 0;
  max-width: 560px;
  width: 100%;
  max-height: 82vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
}

.instructions-panel::before {
  content: "";
  position: absolute;
  top: 0; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--surface-highlight), transparent);
  pointer-events: none;
}

.instructions-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem 0.75rem;
  flex-shrink: 0;
}

.instructions-head h2 {
  font-size: 1.1rem;
  font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.instructions-close {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  background: var(--surface-hover);
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.instructions-close:hover { background: var(--danger-bg); color: var(--danger); }

.instructions-body {
  padding: 0.5rem 1.5rem 1.5rem;
  overflow-y: auto;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text);
}

.instructions-body p { margin-bottom: 0.9rem; }

.instructions-body ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}

.instructions-body ol li {
  margin-bottom: 0.75rem;
  padding-left: 0.25rem;
}

.instructions-body ol li strong {
  color: var(--accent-1);
}

[data-theme="dark"] .instructions-body ol li strong {
  color: var(--accent-2);
}

.instructions-body .instructions-note {
  padding: 1rem;
  background: var(--sidebar-active);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-warm);
  font-size: 0.84rem;
  margin-bottom: 0.9rem;
}

.instructions-body .instructions-privacy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════
   Confirm Dialog
   ═══════════════════════════════════════════════════════════ */
.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1001;
  padding: 1rem;
}

.confirm-box {
  background: var(--surface);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.22);
  padding: 1.5rem;
  max-width: 340px;
  width: 100%;
  text-align: center;
}

.confirm-box p { margin-bottom: 1.15rem; font-size: 0.92rem; font-weight: 500; line-height: 1.5; }
.confirm-box .btn-row { justify-content: center; }

/* ═══════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 270px;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: none;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.15);
  }

  .sidebar.collapsed {
    width: 270px;
    padding: 1.1rem 0.75rem;
    opacity: 1;
    pointer-events: auto;
  }

  .main-wrapper { padding: 0.75rem 0.75rem 0; }

  .brand-title { font-size: 1.3rem; }
  .brand-tooltip {
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    width: min(300px, calc(100vw - 32px));
    font-size: 0.8rem;
    padding: 0.8rem 0.95rem;
  }

  .brand-container:hover .brand-tooltip,
  .brand-container:focus-within .brand-tooltip,
  .brand-container.active .brand-tooltip {
    transform: translateX(-50%) translateY(0);
  }

  .tooltip-arrow {
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
  }

  .card { padding: 1rem; margin-bottom: 0.65rem; border-radius: 12px; }

  .weight-control input[type="range"] { width: 50px; }

  .scoring-grid th, .scoring-grid td { padding: 0.38rem; }
  .score-input { width: 42px; font-size: 0.82rem; }

  .btn { padding: 0.42rem 0.7rem; font-size: 0.76rem; }

  .btn-icon { width: 30px; height: 30px; }
  .btn-icon svg { width: 14px; height: 14px; }

  .theme-toggle { width: 42px; height: 22px; }
  .toggle-knob { width: 18px; height: 18px; }
  [data-theme="dark"] .toggle-knob { transform: translateX(20px); }
  .toggle-knob svg { width: 10px; height: 10px; }

  .instructions-panel { max-height: 90vh; }
  .instructions-head { padding: 1rem 1.15rem 0.6rem; }
  .instructions-body { padding: 0.4rem 1.15rem 1.25rem; }
}