/* ==========================================================================
   Keisha.app - Design System & Styles (Cal.com Inspired Clean SaaS Design)
   Reference: cal_DESIGN.md (getdesign.md)
   ========================================================================== */

:root {
  /* Canvas & Surface Colors */
  --bg-canvas: #f8f9fa;
  --bg-card: #ffffff;
  --bg-surface-soft: #f3f4f6;
  --bg-input: #ffffff;
  
  /* Text & Border Colors */
  --ink: #111111;
  --body: #374151;
  --muted: #6b7280;
  --muted-soft: #9ca3af;
  --hairline: #e5e7eb;
  --hairline-dark: #d1d5db;

  /* Accent & Status Colors */
  --primary: #111111;
  --primary-hover: #242424;
  --brand-blue: #3b82f6;
  --brand-emerald: #10b981;
  --badge-emerald-bg: #ecfdf5;
  --badge-emerald-text: #047857;
  --badge-amber-bg: #fffbeb;
  --badge-amber-text: #b45309;

  /* Distinct Group Palette (Cal.com Soft Badges) */
  --group-1: #111111;
  --group-2: #2563eb;
  --group-3: #059669;
  --group-4: #d97706;
  --group-5: #7c3aed;
  --group-6: #db2777;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.03);
  --shadow-elevated: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-active: 0 4px 12px rgba(0, 0, 0, 0.08);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

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

html {
  font-size: 16px;
  background-color: var(--bg-canvas);
  color: var(--body);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

body {
  min-height: 100vh;
  position: relative;
  background-color: var(--bg-canvas);
}

/* Layout Container */
.app-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 60px 20px;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hairline);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon-wrapper {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--ink);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text h1 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1.1;
}

.logo-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--bg-surface-soft);
  color: var(--muted);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--hairline);
}

.tagline {
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 500;
}

.btn-secondary-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: var(--transition-fast);
}

.btn-secondary-sm:hover {
  background: var(--bg-surface-soft);
  border-color: var(--hairline-dark);
}

/* Card System */
.card {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
  overflow: hidden;
}

.card-body {
  padding: 20px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--hairline);
  background: #ffffff;
}

.header-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-title h2 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.step-badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-surface-soft);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--hairline);
}

.step-badge.highlight-badge {
  background: var(--ink);
  color: #ffffff;
  border-color: var(--ink);
}

/* Hero Section: Total Amount Input */
.total-amount-group {
  margin-bottom: 20px;
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.section-label-sub {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 8px;
}

.currency-badge {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--bg-surface-soft);
  color: var(--muted);
  border: 1px solid var(--hairline);
}

.currency-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1.5px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 6px 16px;
  transition: var(--transition-fast);
}

.currency-input-wrapper:focus-within {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(17, 17, 17, 0.08);
}

.currency-symbol {
  font-size: 2rem;
  font-weight: 800;
  color: var(--muted);
  margin-right: 10px;
  user-select: none;
}

.currency-input-wrapper input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-family);
  color: var(--ink);
  letter-spacing: -0.03em;
}

/* Preset Tabs (Segment Controller) */
.preset-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  background: var(--bg-surface-soft);
  padding: 4px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
}

.preset-tab {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 8px;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  color: var(--body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.preset-tab:hover {
  color: var(--ink);
}

.preset-tab.active {
  background: #ffffff;
  color: var(--ink);
  box-shadow: var(--shadow-card);
  font-weight: 700;
}

/* Group Inputs */
.groups-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.group-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-surface-soft);
  padding: 12px 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
}

.group-name-input {
  flex: 1;
  background: #ffffff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  outline: none;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 700;
  font-family: var(--font-family);
  min-width: 120px;
}

.group-name-input:focus {
  border-color: var(--ink);
}

.group-item-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mini-control {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline);
}

.mini-control label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
}

.mini-input {
  width: 44px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  font-family: var(--font-mono);
  text-align: center;
}

.btn-action-sm {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  background: var(--ink);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-action-sm:hover {
  background: var(--primary-hover);
}

.btn-remove-group {
  background: #ffffff;
  border: 1px solid var(--hairline);
  color: #ef4444;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-remove-group:hover {
  background: #fef2f2;
  border-color: #fca5a5;
}

/* Settings Card */
.grid-settings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.setting-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.setting-box.full-width {
  grid-column: span 2;
}

.setting-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.pill-group {
  display: flex;
  background: var(--bg-surface-soft);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline);
  gap: 3px;
}

.pill-btn {
  flex: 1;
  padding: 7px 4px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--body);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.pill-btn.active {
  background: #ffffff;
  color: var(--ink);
  box-shadow: var(--shadow-card);
  font-weight: 700;
}

.select-wrapper select {
  width: 100%;
  background: var(--bg-input);
  border: 1.5px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: var(--font-family);
  outline: none;
  cursor: pointer;
}

.select-wrapper select:focus {
  border-color: var(--ink);
}

/* Results Section */
.status-chip {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
}

.summary-hero-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.hero-stat-card {
  background: var(--bg-surface-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-stat-card.primary-stat {
  background: #ffffff;
  border-color: var(--ink);
  box-shadow: var(--shadow-card);
}

.stat-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.stat-number {
  font-size: 1.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--ink);
}

.stat-number.highlight-text {
  font-size: 1.35rem;
}

/* Ratio Bar */
.ratio-bar-container {
  background: var(--bg-surface-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 14px;
  margin-bottom: 20px;
}

.ratio-bar-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.ratio-bar-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--muted);
}

.ratio-bar-subtitle {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--muted);
}

.ratio-bar {
  height: 10px;
  width: 100%;
  background: #e5e7eb;
  border-radius: var(--radius-pill);
  display: flex;
  overflow: hidden;
  gap: 2px;
}

.ratio-bar-segment {
  height: 100%;
  transition: width 0.3s ease;
}

/* Breakdown List */
.result-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.result-card-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  border-left: 4px solid var(--ink);
  box-shadow: var(--shadow-card);
}

.res-group-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}

.res-group-meta {
  font-size: 0.78rem;
  color: var(--muted);
}

.res-price-box {
  text-align: right;
}

.res-price-amount {
  font-size: 1.3rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--ink);
  line-height: 1.2;
}

.res-price-sub {
  font-size: 0.75rem;
  color: var(--muted);
}

/* Assist Panel */
.assist-panel {
  background: var(--bg-surface-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.assist-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}

.assist-icon {
  font-size: 1.3rem;
}

.assist-title h3 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
}

.assist-title p {
  font-size: 0.78rem;
  color: var(--muted);
}

.input-label-sm {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 4px;
}

.input-with-icon {
  display: flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  margin-bottom: 14px;
}

.input-inner-icon {
  margin-right: 8px;
  font-size: 0.85rem;
}

.input-with-icon input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--ink);
  font-size: 0.85rem;
  font-family: var(--font-family);
}

.btn-primary-block {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: var(--ink);
  border: none;
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary-block:hover {
  background: var(--primary-hover);
}

/* Checklist Card */
.checklist-count {
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--badge-emerald-text);
  background: var(--badge-emerald-bg);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.checklist-subtext {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.chk-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  border: 1px solid var(--hairline);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
}

.chk-card:hover {
  border-color: var(--hairline-dark);
}

.chk-card.checked {
  background: var(--badge-emerald-bg);
  border-color: #a7f3d0;
}

.chk-left-box {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chk-box-custom {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-xs);
  border: 1.5px solid var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 900;
  color: var(--badge-emerald-text);
  background: #ffffff;
}

.chk-card.checked .chk-box-custom {
  border-color: var(--badge-emerald-text);
  background: #ffffff;
}

.chk-member-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
}

.chk-member-amount {
  font-size: 0.82rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--muted);
}

.chk-card.checked .chk-member-name,
.chk-card.checked .chk-member-amount {
  color: var(--badge-emerald-text);
}

/* Toast */
.toast-popup {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  box-shadow: var(--shadow-elevated);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 9999;
  transition: all 0.25s ease;
  opacity: 1;
}

.toast-popup.hidden {
  opacity: 0;
  transform: translate(-50%, 15px);
  pointer-events: none;
}

.toast-icon {
  color: var(--brand-emerald);
  font-weight: 800;
}

/* Footer */
.app-footer {
  text-align: center;
  padding-top: 24px;
  color: var(--muted);
  font-size: 0.75rem;
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
  .app-container {
    padding: 16px 12px 40px 12px;
  }

  .summary-hero-grid {
    grid-template-columns: 1fr;
  }

  .grid-settings {
    grid-template-columns: 1fr;
  }

  .setting-box.full-width {
    grid-column: span 1;
  }

  .checklist-grid {
    grid-template-columns: 1fr;
  }

  .group-item {
    flex-direction: column;
    align-items: stretch;
  }

  .group-item-controls {
    justify-content: space-between;
  }
}