/* ============================================================
   COLLECTION TRACKER 2026 — Bright Colorful Design
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Nunito:wght@600;700;800&display=swap');

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

:root {
  /* Bright colorful theme (default - light mode) */
  --bg:       #f8fafc;
  --surf:     #ffffff;
  --surf2:    #f1f5f9;
  --surf3:    #e2e8f0;
  --border:   rgba(15,23,42,0.08);
  --border2:  rgba(15,23,42,0.15);
  --text:     #1e293b;
  --text2:    #475569;
  --muted:    #94a3b8;
  --muted2:   #64748b;
  --accent:   #6366f1;
  --accent2:  #8b5cf6;
  --accent3:  #ec4899;
  --green:    #10b981;
  --red:      #ef4444;
  --blue:     #3b82f6;
  --orange:   #f97316;
  --yellow:   #eab308;
  --cyan:     #06b6d4;
  --pink:     #f43f5e;
  --nav-h:    64px;
  --top-h:    64px;
  --r:        16px;
  --r-sm:     12px;
  --shadow:   0 8px 32px rgba(99,102,241,0.15);
  --shadow-lg: 0 20px 50px rgba(99,102,241,0.2);
}

/* Dark Mode */
body.dark-mode {
  --bg:       #0f172a;
  --surf:     #1e293b;
  --surf2:    #334155;
  --surf3:    #475569;
  --border:   rgba(255,255,255,0.08);
  --border2:  rgba(255,255,255,0.15);
  --text:     #f1f5f9;
  --text2:    #cbd5e1;
  --muted:    #64748b;
  --muted2:   #94a3b8;
  --shadow:   0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.5);
}

body.dark-mode .topbar {
  background: linear-gradient(135deg, #312e81 0%, #4c1d95 50%, #831843 100%);
}

body.dark-mode .stat-chip {
  background: #1e293b;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

body.dark-mode .stat-chip-val {
  color: #f1f5f9;
}

body.dark-mode .search-bar {
  background: #1e293b;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

body.dark-mode .search-bar input,
body.dark-mode .search-bar select {
  color: #f1f5f9;
}

body.dark-mode .search-bar select {
  background: #334155;
  color: #cbd5e1;
}

body.dark-mode .member-card {
  background: #1e293b;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

body.dark-mode .mc-progress-wrap {
  background: #334155;
}

body.dark-mode .mc-month-btn {
  background: #334155;
}

body.dark-mode .mc-month-btn.is-unpaid {
  background: rgba(239,68,68,0.15);
}

body.dark-mode .bottom-nav {
  background: #1e293b;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.4);
}

body.dark-mode .bottom-sheet {
  background: #1e293b;
  box-shadow: 0 -10px 40px rgba(0,0,0,0.5);
}

body.dark-mode .sheet-handle {
  background: #475569;
}

body.dark-mode .sheet-amt-wrap,
body.dark-mode .sheet-text-input {
  background: #334155;
  border-color: rgba(255,255,255,0.15);
}

body.dark-mode .sheet-amt-input,
body.dark-mode .sheet-text-input {
  color: #f1f5f9;
}

body.dark-mode .sheet-status-btn {
  background: #334155;
  color: #cbd5e1;
}

body.dark-mode .sheet-mode-btn {
  background: #334155;
  color: #cbd5e1;
}

body.dark-mode .mcard {
  background: #1e293b;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

body.dark-mode .mcard-body {
  background: #1e293b;
}

body.dark-mode .mfull-card {
  background: #1e293b;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

body.dark-mode .toast {
  background: #334155;
  color: #f1f5f9;
}

body.dark-mode .detail-month-cell {
  background: #334155;
}

body.dark-mode .sheet-close-btn {
  background: #334155;
}

body.dark-mode .mfull-del {
  background: #334155;
}

body.dark-mode .topbar-fab {
  background: #1e293b;
  color: #a78bfa;
}

body.dark-mode .topbar-logo {
  background: linear-gradient(135deg, #f97316, #eab308);
  -webkit-background-clip: text;
  background-clip: text;
}

html { font-size: 15px; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Outfit', 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surf3); border-radius: 99px; }

/* ===== TOPBAR ===== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--top-h);
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 80;
  padding-top: env(safe-area-inset-top, 0);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-logo {
  width: 38px; height: 38px;
  background: white;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Nunito', sans-serif;
  font-size: 20px; font-weight: 800;
  background: linear-gradient(135deg, #f97316, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

.topbar-title {
  font-family: 'Nunito', sans-serif;
  font-size: 18px; font-weight: 800;
  color: white;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.topbar-sub { font-size: 11px; color: rgba(255,255,255,0.85); margin-top: 1px; font-weight: 600; }

.topbar-fab {
  width: 40px; height: 40px;
  background: white;
  border: none;
  border-radius: 12px;
  color: #6366f1;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(99,102,241,0.35);
  transition: transform 0.15s, box-shadow 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.topbar-fab:active { transform: scale(0.92); }

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

#darkModeBtn {
  background: rgba(255,255,255,0.2);
  color: white;
}

#darkModeBtn:active { transform: scale(0.92); }

/* ===== MAIN ===== */
.main {
  padding-top: calc(var(--top-h) + 12px);
  padding-bottom: calc(var(--nav-h) + 16px + env(safe-area-inset-bottom, 0px));
  min-height: 100dvh;
}

/* ===== VIEWS ===== */
.view { display: none; padding: 0 12px; animation: fadeUp 0.25s ease; }
.view.active { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.view-header { padding: 8px 4px 16px; }
.view-title {
  font-family: 'Nunito', sans-serif;
  font-size: 26px; font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
}
.view-sub { font-size: 14px; color: var(--muted); margin-top: 4px; font-weight: 500; }

/* ===== STATS ROW ===== */
.stats-row {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 4px 12px 12px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.stats-row::-webkit-scrollbar { display: none; }

.stat-chip {
  flex-shrink: 0;
  background: white;
  border: none;
  border-radius: 16px;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 100px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  position: relative;
  overflow: hidden;
}
.stat-chip::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: var(--c);
}
.stat-chip-val {
  font-family: 'Nunito', sans-serif;
  font-size: 18px; font-weight: 800;
  color: var(--text);
  white-space: nowrap;
}
.stat-chip-lbl {
  font-size: 11px; font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== SEARCH BAR ===== */
.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: white;
  border: none;
  border-radius: 14px;
  padding: 12px 16px;
  margin: 0 12px 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
  transition: box-shadow 0.2s;
}
.search-bar:focus-within { box-shadow: 0 4px 20px rgba(99,102,241,0.2); }
.search-bar svg { color: var(--muted); flex-shrink: 0; }

.search-bar input {
  flex: 1;
  background: none; border: none; outline: none;
  font-family: 'Outfit', sans-serif;
  font-size: 14px; color: var(--text);
  min-width: 0;
}
.search-bar input::placeholder { color: var(--muted); }

.search-bar select {
  background: var(--surf2);
  border: none;
  border-radius: 8px;
  padding: 6px 10px;
  font-family: 'Outfit', sans-serif;
  font-size: 12px; font-weight: 600;
  color: var(--text2);
  outline: none; cursor: pointer;
  flex-shrink: 0;
}

/* ===== MEMBER CARDS ===== */
.member-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 0 12px 12px;
}

.member-card {
  background: white;
  border: none;
  border-radius: var(--r);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
  transition: transform 0.2s, box-shadow 0.2s;
}
.member-card:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,0,0,0.1); }
.member-card.expanded { box-shadow: 0 8px 30px rgba(99,102,241,0.15); }

/* Card Header */
.mc-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 16px 14px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.mc-avatar {
  width: 46px; height: 46px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Nunito', sans-serif;
  font-size: 16px; font-weight: 800;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.mc-info { flex: 1; min-width: 0; }
.mc-name {
  font-size: 16px; font-weight: 700;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mc-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}
.mc-total {
  font-size: 14px; font-weight: 700;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mc-progress-wrap {
  flex: 1;
  height: 6px;
  background: var(--surf3);
  border-radius: 99px;
  overflow: hidden;
}
.mc-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899);
  border-radius: 99px;
  transition: width 0.4s ease;
}
.mc-paid-count {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.mc-chevron {
  color: var(--muted);
  transition: transform 0.25s;
  flex-shrink: 0;
}
.member-card.expanded .mc-chevron { transform: rotate(180deg); }

/* Card Month Grid */
.mc-months {
  display: none;
  padding: 0 16px 16px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.member-card.expanded .mc-months { display: block; }

.mc-months-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.mc-month-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  border-radius: 12px;
  border: none;
  background: var(--surf2);
  cursor: pointer;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  min-height: 66px;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.mc-month-btn:active { transform: scale(0.94); }

.mc-month-btn.is-paid {
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(16,185,129,0.05));
  border: none;
}
.mc-month-btn.is-unpaid {
  background: rgba(248,113,113,0.06);
  border: none;
}

.mc-month-label {
  font-size: 11px; font-weight: 700;
  color: var(--muted2);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.mc-month-btn.is-paid .mc-month-label { color: #10b981; }
.mc-month-btn.is-unpaid .mc-month-label { color: #ef4444; }

.mc-month-status {
  font-size: 20px;
  line-height: 1;
  font-weight: 700;
}

.mc-month-amt {
  font-size: 11px;
  color: var(--muted);
  font-weight: 600;
}
.mc-month-btn.is-paid .mc-month-amt { color: #10b981; opacity: 0.9; }

/* ===== ANALYTICS ===== */
.hero-strip {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-card {
  background: white;
  border: none;
  border-radius: var(--r);
  padding: 20px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
}
.hero-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899);
}
.hero-card:nth-child(2)::before { background: linear-gradient(90deg, #3b82f6, #06b6d4); }
.hero-card:nth-child(3)::before { background: linear-gradient(90deg, #f97316, #eab308); }

.hero-label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 8px; }
.hero-value { font-family: 'Nunito', sans-serif; font-size: 32px; font-weight: 800; color: var(--text); letter-spacing: -1px; }
.hero-sub { font-size: 13px; color: var(--muted); margin-top: 4px; font-weight: 500; }

.month-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.mcard {
  background: white;
  border: none;
  border-radius: var(--r);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
}
.mcard-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
}
.mcard-name {
  font-family: 'Nunito', sans-serif;
  font-size: 14px; font-weight: 800;
  color: white;
}
.mcard-total {
  font-size: 14px; font-weight: 700;
  color: white;
}
.mcard-body { padding: 14px 16px; }
.mcard-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  padding: 4px 0;
  color: var(--text2);
  font-weight: 500;
}
.mcard-row .v { font-weight: 700; }
.mcard-row .v.g { color: #10b981; }
.mcard-row .v.r { color: #ef4444; }
.mcard-row .v.b { color: #3b82f6; }
.mcard-row .v.o { color: #f97316; }
.mcard-bar { height: 6px; background: var(--surf3); border-radius: 99px; margin-top: 10px; overflow: hidden; }
.mcard-fill { height: 100%; background: linear-gradient(90deg, #10b981, #34d399); border-radius: 99px; }
.mcard-pct { font-size: 12px; font-weight: 700; color: #10b981; text-align: right; margin-top: 6px; }

/* ===== FULL MEMBERS VIEW ===== */
.members-list { display: flex; flex-direction: column; gap: 10px; }

.mfull-card {
  background: white;
  border: none;
  border-radius: var(--r);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 4px 15px rgba(0,0,0,0.06);
}
.mfull-card:active { 
  transform: scale(0.98);
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.mfull-avatar {
  width: 48px; height: 48px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Nunito', sans-serif;
  font-size: 17px; font-weight: 800;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}
.mfull-info { flex: 1; min-width: 0; }
.mfull-name {
  font-size: 16px; font-weight: 700;
  color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mfull-sub {
  display: flex; align-items: center; gap: 10px;
  margin-top: 4px;
}
.mfull-total { 
  font-size: 14px; font-weight: 700; 
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mfull-months { font-size: 12px; color: var(--muted); font-weight: 500; }
.mfull-del {
  width: 38px; height: 38px;
  background: var(--surf2);
  border: none;
  border-radius: 10px;
  color: var(--muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}
.mfull-del:active {
  background: rgba(239,68,68,0.15);
  color: var(--red);
}

/* ===== BOTTOM NAV ===== */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: calc(var(--nav-h) + env(safe-area-inset-bottom, 0px));
  background: white;
  border-top: none;
  display: flex;
  z-index: 80;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}

.bnav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--muted);
  font-family: 'Outfit', sans-serif;
  font-size: 11px; font-weight: 600;
  cursor: pointer;
  padding: 10px 0;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  border-radius: 12px;
  margin: 4px 8px;
}
.bnav-item.active { 
  color: #6366f1;
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(139,92,246,0.05));
}
.bnav-item svg { transition: stroke 0.15s; }
.bnav-item.active svg { stroke: #6366f1; }

/* ===== BOTTOM SHEET ===== */
.sheet-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.sheet-overlay.open { 
  display: block;
  opacity: 1;
}

.bottom-sheet {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: white;
  border-radius: 24px 24px 0 0;
  z-index: 1001;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
  max-height: 92dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-bottom: env(safe-area-inset-bottom, 16px);
  -webkit-overflow-scrolling: touch;
  box-shadow: 0 -10px 40px rgba(99,102,241,0.15);
}
.bottom-sheet.sheet-tall { max-height: 96dvh; }
.bottom-sheet.open { transform: translateY(0); }

.sheet-handle {
  width: 40px; height: 5px;
  background: var(--surf3);
  border-radius: 99px;
  margin: 14px auto 6px;
  flex-shrink: 0;
}

/* Sheet header — member row + month tabs */
.sheet-top {
  padding: 8px 20px 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
}

.sheet-member-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.sheet-member-avatar {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Nunito', sans-serif;
  font-size: 16px; font-weight: 800;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}
.sheet-member-name {
  font-family: 'Nunito', sans-serif;
  font-size: 18px; font-weight: 800;
  color: var(--text);
}
.sheet-member-total { 
  font-size: 14px; 
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700; 
  margin-top: 2px; 
}

/* Month tabs strip */
.sheet-month-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}
.sheet-month-tabs::-webkit-scrollbar { display: none; }

.sheet-month-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 12px;
  border-radius: 12px;
  border: none;
  background: var(--surf2);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s;
  min-width: 56px;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.sheet-month-tab:active { transform: scale(0.93); }

.sheet-month-tab.tab-active {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(139,92,246,0.1));
  border: none;
  box-shadow: 0 4px 12px rgba(99,102,241,0.2);
}
.sheet-month-tab.tab-paid {
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(16,185,129,0.05));
  border: none;
}
.sheet-month-tab.tab-paid.tab-active {
  border: none;
  background: linear-gradient(135deg, rgba(16,185,129,0.2), rgba(16,185,129,0.1));
  box-shadow: 0 4px 12px rgba(16,185,129,0.2);
}

.smt-name {
  font-size: 11px; font-weight: 700;
  color: var(--muted2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sheet-month-tab.tab-active .smt-name { color: #6366f1; }
.sheet-month-tab.tab-paid .smt-name { color: #10b981; }

.smt-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--surf3);
}
.sheet-month-tab.tab-paid .smt-dot { background: #10b981; }
.sheet-month-tab.tab-active:not(.tab-paid) .smt-dot { background: #6366f1; }

/* Sheet Form */
.sheet-form { padding: 18px 20px 10px; }

.sheet-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.sheet-title {
  font-family: 'Nunito', sans-serif;
  font-size: 22px; font-weight: 800;
  color: var(--text);
}
.sheet-close-btn {
  width: 36px; height: 36px;
  background: var(--surf2);
  border: none;
  border-radius: 10px;
  color: var(--muted);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: all 0.15s;
}
.sheet-close-btn:active { background: var(--surf3); }
.sheet-desc { font-size: 14px; color: var(--muted); margin-bottom: 18px; font-weight: 500; }

.sheet-section-label {
  font-size: 12px; font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 12px;
}

/* Status buttons */
.sheet-status-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.sheet-status-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  border-radius: 14px;
  border: 2px solid var(--border2);
  background: white;
  font-family: 'Outfit', sans-serif;
  font-size: 15px; font-weight: 700;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.sheet-status-btn:active { transform: scale(0.96); }

.unpaid-btn.active {
  background: linear-gradient(135deg, rgba(239,68,68,0.1), rgba(239,68,68,0.05));
  border-color: #ef4444;
  color: #ef4444;
}
.paid-btn.active {
  background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(16,185,129,0.05));
  border-color: #10b981;
  color: #10b981;
}

/* Paid fields */
.sheet-paid-fields { animation: slideDown 0.2s ease; }
.sheet-paid-fields.hidden { display: none; }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: none; }
}

/* Mode buttons */
.sheet-mode-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.sheet-mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 18px 14px;
  border-radius: 14px;
  border: 2px solid var(--border2);
  background: white;
  cursor: pointer;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
  color: var(--text2);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.sheet-mode-btn:active { transform: scale(0.96); }
.sheet-mode-btn svg { color: inherit; }
.sheet-mode-btn span { font-family: 'Outfit', sans-serif; font-size: 15px; font-weight: 700; }
.sheet-mode-btn small { font-size: 11px; color: var(--muted); font-weight: 500; }
.sheet-mode-btn.active {
  background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(6,182,212,0.05));
  border-color: #3b82f6;
  color: #3b82f6;
}
.sheet-mode-btn.active small { color: #3b82f6; opacity: 0.8; }

/* Amount input */
.sheet-amt-wrap {
  display: flex;
  align-items: center;
  background: white;
  border: 2px solid var(--border2);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.sheet-amt-wrap:focus-within { 
  border-color: #6366f1; 
  box-shadow: 0 4px 15px rgba(99,102,241,0.15);
}

.sheet-amt-sym {
  padding: 0 18px;
  font-family: 'Nunito', sans-serif;
  font-size: 24px; font-weight: 800;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border-right: 1px solid var(--border);
  line-height: 1;
}

.sheet-amt-input {
  flex: 1;
  padding: 20px 16px;
  background: none;
  border: none; outline: none;
  font-family: 'Nunito', sans-serif;
  font-size: 30px; font-weight: 800;
  color: var(--text);
  width: 100%;
  -moz-appearance: textfield;
}
.sheet-amt-input::-webkit-outer-spin-button,
.sheet-amt-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.sheet-amt-input::placeholder { color: var(--surf3); }

/* Text input */
.sheet-text-input {
  width: 100%;
  padding: 16px 18px;
  background: white;
  border: 2px solid var(--border2);
  border-radius: 14px;
  font-family: 'Outfit', sans-serif;
  font-size: 16px; font-weight: 500;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.sheet-text-input:focus { 
  border-color: #6366f1; 
  box-shadow: 0 4px 15px rgba(99,102,241,0.15);
}
.sheet-text-input::placeholder { color: var(--muted); }

/* Save button */
.sheet-save-btn {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  border: none;
  border-radius: 16px;
  color: white;
  font-family: 'Nunito', sans-serif;
  font-size: 17px; font-weight: 800;
  cursor: pointer;
  transition: all 0.18s;
  box-shadow: 0 6px 20px rgba(99,102,241,0.35);
  -webkit-tap-highlight-color: transparent;
  margin-top: 24px;
  letter-spacing: 0.3px;
}
.sheet-save-btn:active { transform: scale(0.97); }
.sheet-save-btn:disabled { opacity: 0.5; pointer-events: none; }

/* Member detail sheet */
.detail-month-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.detail-month-cell {
  background: var(--surf2);
  border: 1.5px solid var(--border2);
  border-radius: 10px;
  padding: 10px 8px;
  text-align: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: all 0.15s;
}
.detail-month-cell:active { transform: scale(0.94); }
.detail-month-cell.is-paid {
  background: rgba(52,211,153,0.1);
  border-color: rgba(52,211,153,0.3);
}
.dmc-name { font-size: 12px; font-weight: 600; color: var(--muted2); text-transform: uppercase; }
.detail-month-cell.is-paid .dmc-name { color: var(--green); }
.dmc-icon { font-size: 20px; margin: 4px 0; }
.dmc-amt { font-size: 11px; color: var(--muted); }
.detail-month-cell.is-paid .dmc-amt { color: var(--green); opacity: 0.75; }

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: calc(var(--nav-h) + 16px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: white;
  border: none;
  color: var(--text);
  padding: 14px 24px;
  border-radius: 99px;
  font-size: 14px; font-weight: 600;
  opacity: 0;
  transition: all 0.28s cubic-bezier(0.34,1.56,0.64,1);
  z-index: 200;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
  max-width: calc(100vw - 32px);
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border: 2px solid #10b981; color: #10b981; }
.toast.error   { border: 2px solid #ef4444; color: #ef4444; }

/* ===== DESKTOP LAYOUT (≥ 768px) ===== */
@media (min-width: 768px) {
  :root { --top-h: 68px; --nav-h: 0px; }

  .topbar { padding: 0 28px; }
  .bottom-nav { display: none; }

  /* Desktop sidebar */
  body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 220px;
    height: 100vh;
    background: var(--surf);
    border-right: 1px solid var(--border);
    z-index: 10;
  }

  .main {
    margin-left: 220px;
    padding-top: calc(var(--top-h) + 24px);
    padding-bottom: 40px;
    padding-left: 28px;
    padding-right: 28px;
    max-width: 1300px;
  }

  .topbar { left: 220px; padding-left: 28px; }

  /* Desktop sidebar nav — injected via JS */
  #desktopNav {
    position: fixed;
    top: var(--top-h);
    left: 0;
    width: 220px;
    padding: 20px 12px;
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .stats-row {
    padding: 0 0 16px;
    flex-wrap: wrap;
  }
  .stat-chip { min-width: 140px; flex: 1; }

  .search-bar { margin: 0 0 14px; }
  .member-list { gap: 8px; padding: 0; }

  /* Table on desktop */
  .mc-months-grid { grid-template-columns: repeat(6, 1fr); }

  /* Sheets become centered modals on desktop */
  .bottom-sheet {
    left: 50%;
    right: auto;
    bottom: 50%;
    transform: translateX(-50%) translateY(calc(50% + 40px));
    border-radius: 18px;
    width: 480px;
    max-height: 85vh;
  }
  .bottom-sheet.sheet-tall { width: 540px; }
  .bottom-sheet.open { transform: translateX(-50%) translateY(50%); }
  .sheet-handle { display: none; }

  .analytics-hero { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
  .hero-strip { display: contents; }
  .month-cards { grid-template-columns: repeat(3,1fr); }

  .members-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }

  .toast { bottom: 28px; }
}

@media (min-width: 1100px) {
  .mc-months-grid { grid-template-columns: repeat(6, 1fr); }
  .month-cards { grid-template-columns: repeat(4, 1fr); }
}