/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);
  border:none;border-radius:var(--radius-lg);
  padding:12px var(--space-5);
  font-size:var(--text-body-md);font-weight:var(--weight-semibold);
  transition:background var(--duration-base) var(--ease-standard), transform var(--duration-fast);
  white-space:nowrap;
}
.btn:active{transform:scale(0.98);}
.btn-primary{background:var(--color-primary);color:var(--text-on-primary);}
.btn-primary:hover{background:var(--color-primary-hover);}
.btn-secondary{background:var(--neutral-0);color:var(--color-primary);border:1.5px solid var(--color-primary);}
.btn-secondary:hover{background:var(--color-primary-tint);}
.btn-ghost{background:transparent;color:var(--text-secondary);}
.btn-ghost:hover{background:var(--neutral-100);}
.btn-danger{background:var(--color-danger);color:#fff;}
.btn-block{width:100%;}
.btn-sm{padding:8px var(--space-4);font-size:var(--text-body-sm);}
.btn-lg{padding:16px var(--space-6);font-size:var(--text-body-lg);border-radius:14px;}
/* rounder CTA wrapper per README (18px clip) */
.fuwa-cta{border-radius:18px;overflow:hidden;}
.fuwa-cta .btn{border-radius:18px;}

/* ============ Card ============ */
.card{
  background:var(--bg-surface);
  border-radius:var(--radius-xl);
  padding:var(--space-4);
  box-shadow:var(--shadow-sm);
}
.card-flat{background:var(--bg-surface);border-radius:var(--radius-xl);padding:var(--space-4);border:1px solid var(--border-default);}

/* ============ Badge / Chip / Pill ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:var(--radius-pill);
  font-size:var(--text-body-sm);font-weight:var(--weight-medium);
  background:var(--neutral-100);color:var(--text-secondary);
}
.badge-success{background:var(--color-success-tint);color:var(--green-800);}
.badge-warning{background:var(--color-warning-tint);color:var(--yellow-800);}
.badge-danger{background:var(--color-danger-tint);color:var(--red-700);}
.badge-outline{background:var(--neutral-0);border:1px solid var(--border-default);color:var(--text-secondary);}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 14px;border-radius:var(--radius-pill);
  font-size:var(--text-body-sm);font-weight:var(--weight-medium);
  background:var(--neutral-0);border:1px solid var(--border-default);
  color:var(--text-primary);cursor:pointer;
  transition:all var(--duration-fast) var(--ease-standard);
}
.chip:hover{border-color:var(--color-primary);}
.chip.active{background:var(--color-primary);color:#fff;border-color:var(--color-primary);}
.chip-ghost{background:transparent;border:1px dashed var(--border-strong);color:var(--text-tertiary);}

.option-row{
  display:flex;align-items:center;gap:var(--space-3);
  width:100%;text-align:left;
  padding:var(--space-3) var(--space-4);
  background:var(--neutral-0);border:1px solid var(--border-default);border-radius:var(--radius-lg);
  font-size:var(--text-body-md);color:var(--text-primary);font-weight:var(--weight-medium);
  cursor:pointer;transition:border-color var(--duration-fast);
}
.option-row:hover{border-color:var(--color-primary);}
.option-row .dot{width:16px;height:16px;border-radius:50%;border:1.5px solid var(--border-strong);flex-shrink:0;}

/* ============ Header ============ */
.screen-header{
  flex-shrink:0;
  display:flex;align-items:center;gap:var(--space-3);
  padding:var(--space-3) var(--space-4);
  background:var(--bg-surface);
  border-bottom:1px solid var(--border-default);
  min-height:52px;
}
.screen-header .back-btn{
  width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;flex-shrink:0;color:var(--text-primary);
}
.screen-header .back-btn:hover{background:var(--neutral-100);}
.screen-header .title{font-family:var(--font-display);font-weight:var(--weight-bold);font-size:var(--text-heading-md);flex:1;min-width:0;}
.screen-header .title .subtitle{display:block;font-size:var(--text-body-sm);font-weight:var(--weight-regular);color:var(--text-secondary);}
.wordmark{font-family:var(--font-display);font-weight:var(--weight-extrabold);font-size:22px;color:var(--color-primary);letter-spacing:0.5px;}

/* ============ Bottom tab bar ============ */
.tab-bar{
  flex-shrink:0;
  display:flex;
  background:var(--bg-surface);
  border-top:1px solid var(--border-default);
  padding:var(--space-2) var(--space-2) var(--space-3);
}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:var(--space-1);
  color:var(--text-tertiary);font-size:11px;font-weight:var(--weight-medium);
  border-radius:var(--radius-md);
}
.tab-item.active{color:var(--color-primary);}
.tab-item svg{stroke:currentColor;}

/* ============ Icon button / avatar ============ */
.icon-btn{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;background:transparent;color:var(--text-primary);flex-shrink:0;
}
.icon-btn:hover{background:var(--neutral-100);}
.avatar{
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:var(--weight-bold);color:#fff;
  background:var(--color-primary);flex-shrink:0;
}
.icon-badge{
  width:44px;height:44px;border-radius:var(--radius-lg);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  background:var(--color-primary-tint);color:var(--color-primary);
}

/* ============ Product image / placeholder ============ */
.product-image{
  width:100%;aspect-ratio:1/1;border-radius:var(--radius-xl);overflow:hidden;
  background:var(--color-primary-tint);position:relative;
}
.product-image img{width:100%;height:100%;object-fit:cover;}
.product-image.placeholder{display:flex;align-items:center;justify-content:center;}
.product-image .ph-inner{
  display:flex;flex-direction:column;align-items:center;gap:6px;color:#fff;padding:var(--space-3);text-align:center;
}
.product-image .ph-inner .ph-name{font-family:var(--font-display);font-weight:var(--weight-bold);font-size:13px;line-height:1.25;}
.product-image .ph-inner .ph-brand{font-size:10px;opacity:0.85;text-transform:uppercase;letter-spacing:0.6px;}

/* ============ Stars / rating ============ */
.stars{color:var(--yellow-600);letter-spacing:1px;}
.stars .empty{color:var(--neutral-200);}

/* ============ Accordion ============ */
.accordion-item{border-bottom:1px solid var(--border-default);}
.accordion-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:var(--space-4) 0;cursor:pointer;font-weight:var(--weight-semibold);
}
.accordion-header .chevron{transition:transform var(--duration-base) var(--ease-standard);}
.accordion-item.open .accordion-header .chevron{transform:rotate(180deg);}
.accordion-body{max-height:0;overflow:hidden;transition:max-height var(--duration-slow) var(--ease-standard);}
.accordion-item.open .accordion-body{max-height:600px;padding-bottom:var(--space-4);}

/* ============ Stepper (order tracking) ============ */
.stepper{display:flex;align-items:flex-start;}
.step{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;position:relative;}
.step:not(:last-child)::after{
  content:"";position:absolute;top:14px;left:calc(50% + 18px);width:calc(100% - 36px);height:2px;background:var(--border-default);
}
.step.done:not(:last-child)::after{background:var(--color-primary);}
.step .step-dot{width:28px;height:28px;border-radius:50%;background:var(--neutral-100);color:var(--text-tertiary);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:var(--weight-bold);z-index:1;}
.step.done .step-dot{background:var(--color-primary);color:#fff;}
.step.current .step-dot{background:var(--color-primary);color:#fff;box-shadow:0 0 0 4px var(--focus-ring);}
.step .step-label{font-size:11px;text-align:center;color:var(--text-secondary);font-weight:var(--weight-medium);}
.step.done .step-label,.step.current .step-label{color:var(--text-primary);}

/* ============ Timeline (Care Timeline, Conversation Timeline) ============ */
.timeline{position:relative;padding-left:28px;}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--border-default);}
.timeline-item{position:relative;padding-bottom:var(--space-6);}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";position:absolute;left:-28px;top:2px;width:20px;height:20px;border-radius:50%;
  background:var(--color-success-tint);border:2px solid var(--color-success);
}
.timeline-item.future::before{background:var(--color-warning-tint);border-color:var(--yellow-600);}
.timeline-item.event-dot::before{width:12px;height:12px;left:-23px;top:6px;background:var(--color-primary);border:none;}

/* ============ Empty state ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;text-align:center;
  padding:var(--space-10) var(--space-6);gap:var(--space-2);
}
.empty-state .icon-badge{width:64px;height:64px;margin-bottom:var(--space-2);}
.empty-state .empty-title{font-family:var(--font-display);font-weight:var(--weight-bold);font-size:var(--text-heading-sm);}
.empty-state .empty-subtitle{color:var(--text-secondary);font-size:var(--text-body-sm);max-width:260px;}

/* ============ Bottom sheet ============ */
.sheet-overlay{
  position:absolute;inset:0;background:rgba(20,30,25,0.45);z-index:40;
  display:flex;align-items:flex-end;
  animation:fadeIn var(--duration-base) var(--ease-standard);
}
.sheet{
  width:100%;max-height:88%;background:var(--bg-surface);
  border-radius:20px 20px 0 0;box-shadow:var(--shadow-lg);
  display:flex;flex-direction:column;
  animation:slideUp var(--duration-slow) var(--ease-standard);
}
.sheet .sheet-handle{width:36px;height:4px;background:var(--border-strong);border-radius:var(--radius-pill);margin:var(--space-3) auto;flex-shrink:0;}
.sheet-header{padding:0 var(--space-5) var(--space-3);flex-shrink:0;display:flex;align-items:center;justify-content:space-between;}
.sheet-body{overflow-y:auto;padding:0 var(--space-5) var(--space-5);}
.sheet-footer{flex-shrink:0;padding:var(--space-4) var(--space-5);border-top:1px solid var(--border-default);}
@keyframes slideUp{from{transform:translateY(100%);}to{transform:translateY(0);}}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}

/* ============ Input ============ */
.input{
  width:100%;padding:12px var(--space-4);border-radius:var(--radius-lg);
  border:1px solid var(--border-default);background:var(--bg-surface);
  font-size:var(--text-body-md);color:var(--text-primary);
}
.input:focus{outline:none;border-color:var(--color-primary);box-shadow:var(--shadow-focus);}
.search-hero{
  display:flex;align-items:center;gap:var(--space-3);
  padding:14px var(--space-4);border-radius:var(--radius-xl);
  background:var(--bg-surface);box-shadow:var(--shadow-sm);color:var(--text-tertiary);
}

/* ============ Floating cart pill ============ */
.floating-cart{
  position:absolute;right:var(--space-4);bottom:84px;z-index:30;
  display:flex;align-items:center;gap:8px;
  padding:12px 18px;border-radius:var(--radius-pill);
  background:var(--color-primary);color:#fff;font-weight:var(--weight-semibold);
  box-shadow:var(--shadow-md);
}
.cart-banner{
  display:flex;align-items:center;gap:8px;justify-content:center;
  padding:12px;border-radius:var(--radius-pill);
  background:var(--color-primary);color:#fff;font-weight:var(--weight-semibold);
  margin:0 var(--space-4);
}

/* ============ Toast (lightweight, for demo feedback) ============ */
.toast{
  position:absolute;left:50%;bottom:96px;transform:translateX(-50%);
  background:var(--ink-900);color:#fff;padding:10px 18px;border-radius:var(--radius-pill);
  font-size:var(--text-body-sm);font-weight:var(--weight-medium);
  box-shadow:var(--shadow-md);z-index:50;
  opacity:0;pointer-events:none;transition:opacity var(--duration-base), transform var(--duration-base);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-4px);}

/* ============ KPI card (dashboard) ============ */
.kpi-card{background:var(--bg-surface);border:1px solid var(--border-default);border-radius:var(--radius-xl);padding:var(--space-5);}
.kpi-card .kpi-value{font-family:var(--font-display);font-size:32px;font-weight:var(--weight-extrabold);color:var(--text-primary);}
.kpi-card .kpi-label{font-size:var(--text-body-sm);color:var(--text-secondary);margin-top:4px;}
.kpi-card .kpi-caption{font-size:var(--text-caption);color:var(--text-tertiary);margin-top:2px;}

.funnel-row{margin-bottom:var(--space-4);}
.funnel-track{height:10px;background:var(--neutral-100);border-radius:var(--radius-pill);overflow:hidden;margin-top:6px;}
.funnel-fill{height:100%;background:var(--color-primary);border-radius:var(--radius-pill);}

.heatmap-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;}
.heatmap-cell{aspect-ratio:1/1;border-radius:4px;}

.sidebar-link{
  display:flex;align-items:center;gap:var(--space-3);
  padding:var(--space-3);border-radius:var(--radius-lg);
  color:var(--text-secondary);font-weight:var(--weight-medium);font-size:var(--text-body-md);
}
.sidebar-link.active{background:var(--color-primary-tint);color:var(--color-primary);font-weight:var(--weight-semibold);}
.sidebar-link:hover:not(.active){background:var(--neutral-100);}

/* ============ Demo Nav (hidden helper, not part of the product) ============ */
#demo-nav-toggle{
  position:fixed;right:20px;bottom:20px;z-index:200;
  width:48px;height:48px;border-radius:50%;
  background:var(--ink-900);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-lg);border:none;
}
#demo-nav-panel{
  position:fixed;right:20px;bottom:78px;z-index:200;
  width:300px;max-height:70vh;overflow-y:auto;
  background:var(--neutral-0);border-radius:var(--radius-xl);
  box-shadow:var(--shadow-lg);border:1px solid var(--border-default);
  padding:var(--space-3);
}
#demo-nav-panel h4{
  font-size:11px;text-transform:uppercase;letter-spacing:0.6px;color:var(--text-tertiary);
  margin:var(--space-3) var(--space-2) var(--space-1);
}
#demo-nav-panel h4:first-child{margin-top:var(--space-1);}
.demo-nav-link{
  display:block;width:100%;text-align:left;padding:8px var(--space-2);border-radius:var(--radius-md);
  font-size:var(--text-body-sm);color:var(--text-primary);
}
.demo-nav-link:hover{background:var(--color-primary-tint);}
.demo-nav-link.current{background:var(--color-primary);color:#fff;font-weight:var(--weight-semibold);}

/* ============ Message bubbles (chat) ============ */
.msg-row{display:flex;gap:var(--space-2);margin-bottom:var(--space-4);align-items:flex-start;}
.msg-row.user{justify-content:flex-end;}
.bubble{max-width:78%;padding:var(--space-3) var(--space-4);border-radius:var(--radius-xl);font-size:var(--text-body-md);line-height:var(--leading-normal);}
.bubble-ai{background:var(--bg-surface);box-shadow:var(--shadow-xs);border-bottom-left-radius:4px;}
.bubble-user{background:var(--color-primary);color:#fff;border-bottom-right-radius:4px;}
.ai-avatar{width:32px;height:32px;border-radius:50%;background:var(--color-primary-tint);display:flex;align-items:center;justify-content:center;flex-shrink:0;}