/* =========================================================================
   Klaro — Design System
   Warm, friendly, Lemonade-inspired. System fonts only. No external assets.
   ========================================================================= */

:root {
  /* Brand palette (contractual) */
  --accent: #FF5A5F;
  --bg: #FFF8F4;
  --ink: #1F2933;

  /* Accent scale */
  --accent-strong: #F0474C;
  --accent-soft: #FFE3DC;
  --accent-tint: #FFEFEA;

  /* Ink / neutral scale */
  --ink-soft: #4A5560;
  --ink-mute: #75808B;
  --line: #F0E4DC;
  --surface: #FFFFFF;
  --surface-2: #FFFBF8;

  /* Shape */
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --maxw: 1120px;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(31, 41, 51, 0.06);
  --shadow-md: 0 14px 40px rgba(31, 41, 51, 0.10);
  --shadow-lg: 0 30px 70px rgba(255, 90, 95, 0.18);

  /* Typography — system stack only */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Noto Sans", Arial, sans-serif;
  --font-display: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue",
    sans-serif;

  --nav-h: 68px;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Warm atmospheric background wash */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 45% at 82% -5%, rgba(255, 90, 95, 0.14), transparent 60%),
    radial-gradient(50% 40% at 0% 12%, rgba(255, 174, 150, 0.16), transparent 55%);
  pointer-events: none;
}

img, svg { display: block; max-width: 100%; }

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font: inherit;
  font-weight: 700;
  letter-spacing: -0.01em;
  border: 0;
  border-radius: var(--radius-pill);
  padding: 12px 22px;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn-lg { padding: 15px 30px; font-size: 1.05rem; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(255, 90, 95, 0.30);
}
.btn-primary:hover {
  background: var(--accent-strong);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(255, 90, 95, 0.38);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 2px var(--line);
}
.btn-ghost:hover {
  box-shadow: inset 0 0 0 2px var(--accent);
  color: var(--accent-strong);
  transform: translateY(-2px);
}

/* ---------- Navigation ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(255, 248, 244, 0.78);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(240, 228, 220, 0.7);
}
.nav-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.brand-mark { display: inline-flex; }
.brand-word { line-height: 1; }

.nav-links {
  margin-left: auto;
  display: flex;
  gap: var(--space-5);
}
.nav-links a {
  font-weight: 600;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color .18s ease;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .22s ease;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }

.site-nav .btn-primary { padding: 10px 20px; }

/* ---------- Section rhythm ---------- */
main > section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space-9) var(--space-5);
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-tint);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.section-head {
  max-width: 620px;
  margin: 0 auto var(--space-7);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.section-head h2 { font-size: clamp(1.9rem, 4vw, 2.75rem); }
.section-head p { color: var(--ink-soft); font-size: 1.08rem; }

/* ---------- Hero ---------- */
#hero { position: relative; padding-top: var(--space-8); padding-bottom: var(--space-9); }
.hero-glow {
  position: absolute;
  top: -120px; right: -80px;
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(255, 90, 95, 0.20), transparent 70%);
  filter: blur(10px);
  z-index: 0;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-8);
  align-items: center;
}
.hero-copy { animation: rise .7s cubic-bezier(.2,.7,.3,1) both; }
.hero-title {
  font-size: clamp(2.6rem, 6.2vw, 4.4rem);
  margin: var(--space-4) 0 var(--space-5);
}
.hero-title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
  white-space: nowrap;
}
.hero-title em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 12px;
  background: var(--accent-soft);
  z-index: -1;
  border-radius: 6px;
}
.hero-sub {
  font-size: 1.18rem;
  color: var(--ink-soft);
  max-width: 46ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: var(--space-6) 0 var(--space-5);
}
.hero-badges {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
}
.hero-badges li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.hero-badges .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

/* Mascot */
.hero-mascot {
  position: relative;
  animation: rise .7s cubic-bezier(.2,.7,.3,1) .12s both;
}
.mascot-card {
  background: var(--surface);
  border-radius: 28px;
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
  transition: transform .3s ease;
}
.hero-mascot:hover .mascot-card { transform: rotate(0deg) translateY(-4px); }
.mascot-tag {
  position: absolute;
  bottom: -14px; left: -14px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.mascot-tag strong { font-size: 1rem; }
.mascot-tag span { font-size: 0.8rem; color: rgba(255,255,255,0.72); }

/* ---------- Chat ---------- */
#chat { scroll-margin-top: var(--nav-h); }
.chat-panel {
  max-width: 680px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.chat-topbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: linear-gradient(180deg, var(--accent-tint), var(--surface));
  border-bottom: 1px solid var(--line);
}
.chat-avatar { flex: none; filter: drop-shadow(0 4px 8px rgba(255,90,95,.35)); }
.chat-who { display: flex; flex-direction: column; line-height: 1.2; }
.chat-who strong { font-size: 1.05rem; }
.chat-status {
  font-size: 0.82rem;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #34C759;
  box-shadow: 0 0 0 3px rgba(52,199,89,.18);
}

#chat-log {
  padding: var(--space-5);
  min-height: 280px;
  max-height: 440px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background:
    radial-gradient(circle at 18% 0%, rgba(255,224,214,.35), transparent 40%),
    var(--surface-2);
}
.chat-empty {
  margin: auto;
  color: var(--ink-mute);
  font-size: 0.95rem;
  font-style: italic;
}

/* Message bubbles (used by chat engine in Task 2) */
.msg {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 1rem;
  line-height: 1.45;
  box-shadow: var(--shadow-sm);
  animation: pop .28s ease both;
}
.msg-bot {
  align-self: flex-start;
  background: var(--accent-tint);
  color: var(--ink);
  border-bottom-left-radius: 6px;
}
.msg-user {
  align-self: flex-end;
  background: var(--ink);
  color: #fff;
  border-bottom-right-radius: 6px;
}

/* Typing indicator (chat engine, Task 2) */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 14px 16px;
}
.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-mute);
  opacity: 0.4;
  animation: typing-bounce 1s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* Quick replies */
#chat-quickreplies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0 var(--space-5);
}
#chat-quickreplies:not(:empty) { padding-top: var(--space-4); }
.quick-reply {
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent-strong);
  background: var(--surface);
  border: 1.5px solid var(--accent-soft);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, transform .16s ease, border-color .16s ease;
}
.quick-reply:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

/* Chat form */
#chat-form {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5) var(--space-5);
  border-top: 1px solid var(--line);
  background: var(--surface);
}
#chat-input {
  flex: 1;
  min-width: 0;
  font: inherit;
  padding: 13px 18px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--ink);
  transition: border-color .16s ease, box-shadow .16s ease;
}
#chat-input::placeholder { color: var(--ink-mute); }
#chat-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(255,90,95,.14);
}
#chat-form .btn-primary { padding: 13px 24px; }

/* ---------- Products ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
}
.product-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-6) var(--space-5) var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  overflow: hidden;
}
.product-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #FF9E82);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-soft);
}
.product-card:hover::before { transform: scaleX(1); }
.product-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px; height: 60px;
  border-radius: 18px;
  background: var(--accent-tint);
  color: var(--accent-strong);
  margin-bottom: var(--space-4);
}
.product-card h3 { font-size: 1.25rem; margin-bottom: var(--space-2); }
.product-card p { color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- How it works ---------- */
.steps {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
  counter-reset: step;
}
.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-6) var(--space-5) var(--space-5);
  box-shadow: var(--shadow-sm);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  box-shadow: 0 8px 18px rgba(255,90,95,.3);
  margin-bottom: var(--space-4);
}
.step h3 { font-size: 1.2rem; margin-bottom: var(--space-2); }
.step p { color: var(--ink-soft); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: var(--space-8);
  background: var(--ink);
  color: #fff;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space-8) var(--space-5) var(--space-7);
}
.footer-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-5);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat strong {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}
.stat span { color: rgba(255,255,255,0.62); font-size: 0.92rem; }

.footer-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4) var(--space-6);
  padding-top: var(--space-6);
}
.footer-brand .brand { color: #fff; }
.footer-brand .brand-word { font-size: 1.6rem; }
.disclaimer {
  color: rgba(255,255,255,0.62);
  font-size: 0.92rem;
  max-width: 60ch;
}

/* ---------- Animations ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pop {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; gap: var(--space-7); }
  .hero-mascot { max-width: 340px; margin: 0 auto; }
  .nav-links { display: none; }
  main > section { padding-top: var(--space-8); padding-bottom: var(--space-8); }
}

@media (max-width: 480px) {
  .nav-inner { padding: 0 var(--space-4); gap: var(--space-3); }
  main > section { padding-left: var(--space-4); padding-right: var(--space-4); }
  .site-nav .btn-primary { padding: 9px 16px; font-size: 0.92rem; }
  .hero-actions .btn { flex: 1 1 100%; }
  .footer-stats { grid-template-columns: repeat(2, 1fr); }
  .chat-panel { border-radius: var(--radius-sm); }
}

/* ---------- Scroll reveal (js/main.js) ----------
   [data-reveal] elements are fully visible by default. The hidden
   pre-reveal state is only enabled once js/main.js confirms motion is
   allowed and IntersectionObserver exists (it adds `.reveal-active` to
   <html>) — so missing/blocked JS or reduced-motion never hides content. */
[data-reveal] { opacity: 1; transform: none; }

html.reveal-active [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1);
}
html.reveal-active .product-card {
  transition: opacity .6s cubic-bezier(.2,.7,.3,1), transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
html.reveal-active [data-reveal].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}