/* =====================================================
   MSFG Calculator Hub — Page Styles
   Multi-calculator vertical stack with favorites
   ===================================================== */

/* =====================================================
   CSS VARIABLES
   ===================================================== */
:root {
  --hub-green-bright: #8cc63e;
  --hub-green-medium: #6a9b48;
  --hub-green-forest: #4b7b4d;
  --hub-green-dark:   #2f5e4c;
  --hub-green-teal:   #104547;

  --hub-bg:           #f5f7fa;
  --hub-surface:      #ffffff;
  --hub-surface-alt:  #e8ecf1;
  --hub-text:         #1a1a2e;
  --hub-text-sec:     #4a4a68;
  --hub-text-muted:   #8888a4;
  --hub-border:       #e0e4ea;

  --hub-shadow-sm:    0 1px 3px rgba(0,0,0,0.04);
  --hub-shadow-md:    0 4px 12px rgba(0,0,0,0.07);
  --hub-shadow-lg:    0 8px 28px rgba(0,0,0,0.10);

  --hub-radius:       12px;
  --hub-radius-sm:    8px;
  --hub-radius-pill:  9999px;
  --hub-transition:   0.25s ease;
}

/* =====================================================
   RESET & BASE
   ===================================================== */
.hub-page {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--hub-bg);
  color: var(--hub-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
}

.hub-page *, .hub-page *::before, .hub-page *::after { box-sizing: border-box; }

.hub-page h1, .hub-page h2, .hub-page h3, .hub-page h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  line-height: 1.3;
  margin: 0;
}

.hub-page p  { margin: 0; }
.hub-page ul { list-style: none; padding: 0; margin: 0; }
.hub-page a  { text-decoration: none; color: inherit; }
.hub-page button { font-family: inherit; cursor: pointer; border: none; background: none; padding: 0; }
.hub-page img { display: block; max-width: 100%; height: auto; }

/* =====================================================
   HEADER
   ===================================================== */
.hub-header {
  background: linear-gradient(100deg, var(--hub-green-teal) 0%, var(--hub-green-dark) 35%, var(--hub-green-forest) 65%, var(--hub-green-medium) 100%);
  padding: 1.5rem 1.5rem 1.25rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hub-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 25% 60%, rgba(140,198,62,0.07) 0%, transparent 55%),
              radial-gradient(ellipse at 75% 20%, rgba(255,255,255,0.03) 0%, transparent 50%);
  pointer-events: none;
}

.hub-header-logo {
  height: 36px;
  margin: 0 auto 0.5rem;
  filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
  position: relative;
}

.hub-header h1 {
  color: #fff;
  font-size: 1.35rem;
  margin-bottom: 0.3rem;
  position: relative;
}

.hub-header-sub {
  color: rgba(255,255,255,0.72);
  font-size: 0.85rem;
  max-width: 460px;
  margin: 0 auto;
  position: relative;
  text-align: center;
  line-height: 1.5;
}

/* Counter badges */
.hub-counter-row {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 0.7rem;
  flex-wrap: wrap;
  position: relative;
}

.hub-counter {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
  font-weight: 500;
}

.hub-counter-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.hub-counter-dot--general    { background: var(--hub-green-bright); }
.hub-counter-dot--government { background: #60a5fa; }
.hub-counter-dot--income     { background: #fbbf24; }

/* =====================================================
   MAIN CONTAINER
   ===================================================== */
.hub-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

/* =====================================================
   FAVORITES BAR
   ===================================================== */
.hub-favorites {
  margin-bottom: 1rem;
}

.hub-favorites-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--hub-text-muted);
  margin-bottom: 0.45rem;
}

.hub-favorites-label svg {
  width: 13px;
  height: 13px;
  opacity: 0.5;
}

.hub-pills {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
}

.hub-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--hub-radius-pill);
  border: 1.5px solid var(--hub-border);
  background: var(--hub-surface);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--hub-text-sec);
  cursor: pointer;
  transition: all var(--hub-transition);
  white-space: nowrap;
}

.hub-pill:hover {
  border-color: var(--hub-green-medium);
  background: rgba(140,198,62,0.05);
  color: var(--hub-text);
}

.hub-pill.is-open {
  border-color: var(--hub-green-bright);
  background: rgba(140,198,62,0.1);
  color: var(--hub-green-dark);
  font-weight: 600;
}

.hub-pill-icon {
  font-size: 0.9rem;
  line-height: 1;
}

.hub-pill-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  font-size: 0.6rem;
  color: var(--hub-text-muted);
  margin-left: 0.1rem;
  transition: all 0.15s ease;
  line-height: 1;
}

.hub-pill-remove:hover {
  background: rgba(239,68,68,0.12);
  color: #ef4444;
}

.hub-favorites-empty {
  font-size: 0.78rem;
  color: var(--hub-text-muted);
  font-style: italic;
  padding: 0.15rem 0;
}

/* =====================================================
   SELECTOR PANEL
   ===================================================== */
.hub-selector {
  background: var(--hub-surface);
  border-radius: var(--hub-radius);
  box-shadow: var(--hub-shadow-sm);
  border: 1px solid var(--hub-border);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.hub-selector-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.hub-selector-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--hub-green-bright), var(--hub-green-forest));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.hub-selector-icon svg { width: 15px; height: 15px; }

.hub-selector h2 {
  font-size: 0.95rem;
  color: var(--hub-text);
  flex-shrink: 0;
}

/* Custom select */
.hub-select-wrap {
  flex: 1;
  position: relative;
}

.hub-select-trigger {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.55rem 0.9rem;
  background: var(--hub-bg);
  border: 2px solid var(--hub-border);
  border-radius: var(--hub-radius-sm);
  cursor: pointer;
  transition: all var(--hub-transition);
  user-select: none;
}

.hub-select-trigger:hover { border-color: var(--hub-green-medium); }

.hub-select-trigger.open {
  border-color: var(--hub-green-bright);
  box-shadow: 0 0 0 3px rgba(140,198,62,0.12);
  border-radius: var(--hub-radius-sm) var(--hub-radius-sm) 0 0;
}

.hub-trigger-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
  line-height: 1;
}

.hub-trigger-label {
  flex: 1;
  min-width: 0;
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--hub-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hub-trigger-label.placeholder { color: var(--hub-text-muted); font-weight: 400; }

.hub-trigger-arrow {
  display: flex;
  align-items: center;
  color: var(--hub-text-muted);
  transition: transform var(--hub-transition);
  flex-shrink: 0;
}

.hub-trigger-arrow svg { width: 13px; height: 13px; }
.hub-select-trigger.open .hub-trigger-arrow { transform: rotate(180deg); }

/* Dropdown */
.hub-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--hub-surface);
  border: 2px solid var(--hub-green-bright);
  border-top: none;
  border-radius: 0 0 var(--hub-radius-sm) var(--hub-radius-sm);
  max-height: 360px;
  overflow-y: auto;
  z-index: 200;
  display: none;
  box-shadow: var(--hub-shadow-lg);
}

.hub-dropdown.show {
  display: block;
  animation: hubDropSlide 0.2s ease;
}

@keyframes hubDropSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hub-dropdown-search {
  position: sticky;
  top: 0;
  background: var(--hub-surface);
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid var(--hub-border);
  z-index: 2;
}

.hub-dropdown-search-inner { position: relative; }

.hub-dropdown-search input {
  width: 100%;
  padding: 0.45rem 0.7rem 0.45rem 1.85rem;
  border: 1px solid var(--hub-border);
  border-radius: 6px;
  background: var(--hub-bg);
  font-size: 0.8rem;
  color: var(--hub-text);
  transition: border-color 0.15s ease;
}

.hub-dropdown-search input:focus {
  outline: none;
  border-color: var(--hub-green-bright);
  box-shadow: 0 0 0 2px rgba(140,198,62,0.1);
}

.hub-dropdown-search-icon {
  position: absolute;
  left: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--hub-text-muted);
  pointer-events: none;
}

.hub-dropdown-search-icon svg { width: 12px; height: 12px; }

.hub-opt-group { padding: 0.1rem 0; }

.hub-opt-group-label {
  padding: 0.45rem 0.9rem 0.2rem;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--hub-green-forest);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hub-opt-group-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--hub-border);
}

.hub-opt {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  transition: background 0.12s ease;
  border-left: 3px solid transparent;
}

.hub-opt:hover {
  background: rgba(140,198,62,0.05);
  border-left-color: var(--hub-green-bright);
}

.hub-opt.is-open {
  background: rgba(140,198,62,0.08);
  border-left-color: var(--hub-green-bright);
}

.hub-opt.hidden { display: none; }

.hub-opt-icon {
  font-size: 1rem;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
  line-height: 1;
}

.hub-opt-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--hub-text);
  flex: 1;
  min-width: 0;
}

.hub-opt-check {
  font-size: 0.72rem;
  color: var(--hub-green-bright);
  font-weight: 700;
  display: none;
}

.hub-opt.is-open .hub-opt-check { display: inline; }

.hub-no-results {
  padding: 1rem;
  text-align: center;
  color: var(--hub-text-muted);
  font-size: 0.8rem;
  display: none;
}

.hub-dropdown::-webkit-scrollbar { width: 5px; }
.hub-dropdown::-webkit-scrollbar-track { background: transparent; }
.hub-dropdown::-webkit-scrollbar-thumb { background: var(--hub-green-forest); border-radius: 3px; }
.hub-dropdown { scrollbar-width: thin; scrollbar-color: var(--hub-green-forest) transparent; }

/* =====================================================
   EMPTY STATE
   ===================================================== */
.hub-empty {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--hub-text-muted);
}

.hub-empty svg { opacity: 0.2; margin-bottom: 0.6rem; }

.hub-empty h3 {
  font-size: 1rem;
  color: var(--hub-text-sec);
  margin-bottom: 0.3rem;
}

.hub-empty p {
  font-size: 0.82rem;
  max-width: 370px;
  margin: 0 auto;
  line-height: 1.6;
}

/* =====================================================
   CALCULATOR CARD STACK
   ===================================================== */
.hub-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Individual calculator card */
.hub-card {
  background: var(--hub-surface);
  border-radius: var(--hub-radius);
  box-shadow: var(--hub-shadow-sm);
  border: 1px solid var(--hub-border);
  overflow: hidden;
  animation: hubCardIn 0.3s ease;
}

.hub-card.removing {
  animation: hubCardOut 0.25s ease forwards;
}

@keyframes hubCardIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes hubCardOut {
  from { opacity: 1; transform: translateY(0); max-height: 1000px; }
  to   { opacity: 0; transform: translateY(-8px); max-height: 0; }
}

/* Card header bar */
.hub-card-header {
  background: linear-gradient(135deg, var(--hub-green-bright) 0%, var(--hub-green-forest) 55%, var(--hub-green-teal) 100%);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  overflow: hidden;
}

.hub-card-header::after {
  content: '';
  position: absolute;
  top: -35px;
  right: -35px;
  width: 120px;
  height: 120px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
  pointer-events: none;
}

.hub-card-icon {
  font-size: 1.6rem;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.15));
  flex-shrink: 0;
  line-height: 1;
}

.hub-card-title-group {
  flex: 1;
  min-width: 0;
}

.hub-card-name {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 0.1rem;
  line-height: 1.2;
}

.hub-card-badge {
  display: inline-block;
  background: rgba(255,255,255,0.16);
  color: rgba(255,255,255,0.85);
  padding: 0.1rem 0.55rem;
  border-radius: var(--hub-radius-pill);
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hub-card-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

/* Fav button in card */
.hub-card-fav {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.hub-card-fav:hover { background: rgba(255,255,255,0.22); }

.hub-card-fav svg {
  width: 14px;
  height: 14px;
  stroke: #fff;
  fill: none;
  transition: fill 0.15s ease;
}

.hub-card-fav.is-fav svg {
  fill: #fbbf24;
  stroke: #fbbf24;
}

/* Open button */
.hub-card-open {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 1rem;
  border-radius: var(--hub-radius-sm);
  background: rgba(255,255,255,0.9);
  color: var(--hub-green-dark);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: 'Poppins', sans-serif;
  transition: all 0.15s ease;
}

.hub-card-open:hover {
  background: #fff;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  color: var(--hub-green-dark);
}

/* Close button */
.hub-card-close {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  line-height: 1;
}

.hub-card-close:hover {
  background: rgba(239,68,68,0.25);
  color: #fff;
}

/* Card body: description + features side by side */
.hub-card-body {
  padding: 1rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}

.hub-card-desc {
  font-size: 0.85rem;
  color: var(--hub-text-sec);
  line-height: 1.7;
}

.hub-card-features-heading {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--hub-text-muted);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.hub-card-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  padding: 0.25rem 0;
  font-size: 0.8rem;
  color: var(--hub-text-sec);
  line-height: 1.5;
}

.hub-card-features .check {
  color: var(--hub-green-bright);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
  font-size: 0.82rem;
}

/* Card preview (browser chrome) */
.hub-card-preview {
  border-top: 1px solid var(--hub-border);
  position: relative;
}

.hub-card-toolbar {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.8rem;
  background: var(--hub-surface-alt);
  border-bottom: 1px solid var(--hub-border);
}

.hub-card-dots {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.hub-card-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.hub-card-dots span:nth-child(1) { background: #ff5f57; }
.hub-card-dots span:nth-child(2) { background: #febc2e; }
.hub-card-dots span:nth-child(3) { background: #28c840; }

.hub-card-url {
  flex: 1;
  background: var(--hub-surface);
  border: 1px solid var(--hub-border);
  border-radius: 5px;
  padding: 0.22rem 0.6rem;
  font-size: 0.68rem;
  color: var(--hub-text-muted);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hub-card-toolbar-open {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.6rem;
  border-radius: 5px;
  background: linear-gradient(135deg, var(--hub-green-bright), var(--hub-green-forest));
  color: #fff;
  font-size: 0.68rem;
  font-weight: 600;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.hub-card-toolbar-open:hover {
  box-shadow: 0 2px 6px rgba(140,198,62,0.3);
  color: #fff;
}

.hub-card-toolbar-open svg { width: 10px; height: 10px; }

/* Iframe frame */
.hub-card-frame {
  position: relative;
  width: 100%;
  height: 550px;
  background: #fff;
}

.hub-card-frame iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.hub-card-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  cursor: pointer;
  transition: background 0.15s ease;
}

.hub-card-overlay:hover { background: rgba(140,198,62,0.03); }

.hub-card-overlay-hint {
  position: absolute;
  bottom: 0.6rem;
  right: 0.6rem;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 0.7rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--hub-radius-pill);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
  backdrop-filter: blur(4px);
}

.hub-card-overlay:hover .hub-card-overlay-hint { opacity: 1; }

/* Loading spinner */
.hub-card-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--hub-bg);
  z-index: 3;
  transition: opacity 0.3s ease;
}

.hub-card-loading.loaded {
  opacity: 0;
  pointer-events: none;
}

.hub-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--hub-border);
  border-top-color: var(--hub-green-bright);
  border-radius: 50%;
  animation: hubSpin 0.7s linear infinite;
  margin-bottom: 0.5rem;
}

@keyframes hubSpin { to { transform: rotate(360deg); } }

.hub-card-loading span {
  font-size: 0.75rem;
  color: var(--hub-text-muted);
}

/* =====================================================
   FOOTER
   ===================================================== */
.hub-footer {
  text-align: center;
  padding: 1.5rem 1.25rem;
  border-top: 1px solid var(--hub-border);
  margin-top: 1.75rem;
}

.hub-footer-brand {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--hub-text);
  margin-bottom: 0.25rem;
}

.hub-footer p {
  font-size: 0.75rem;
  color: var(--hub-text-muted);
  max-width: 460px;
  margin: 0 auto;
  line-height: 1.5;
}

/* =====================================================
   A11Y
   ===================================================== */
.hub-select-trigger:focus-visible,
.hub-opt:focus-visible,
.hub-pill:focus-visible,
.hub-card-open:focus-visible,
.hub-card-fav:focus-visible,
.hub-card-close:focus-visible {
  outline: 2px solid var(--hub-green-bright);
  outline-offset: 2px;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
  .hub-header { padding: 1.25rem 1rem 1rem; }
  .hub-header h1 { font-size: 1.15rem; }
  .hub-header-logo { height: 28px; }
  .hub-main { padding: 0.75rem 0.65rem 2rem; }

  .hub-selector-row { flex-wrap: wrap; }
  .hub-selector-row .hub-selector-icon,
  .hub-selector-row h2 { display: none; }
  .hub-select-wrap { flex-basis: 100%; }

  .hub-card-body { grid-template-columns: 1fr; }
  .hub-card-header { flex-wrap: wrap; }
  .hub-card-frame { height: 380px; }
}

@media (max-width: 480px) {
  .hub-selector { padding: 0.65rem 0.75rem; }
  .hub-card-frame { height: 300px; }
  .hub-counter-row { gap: 0.6rem; }
  .hub-pills { gap: 0.3rem; }
  .hub-pill { font-size: 0.7rem; padding: 0.25rem 0.55rem; }
}