/* ═══════════════════════════════════════════════════════════
   NIHON ASSIST — style.css
   Design: clean · modern · trustworthy · calm
   Palette: white · soft purple · dark blue · glassmorphism
═══════════════════════════════════════════════════════════ */

/* ── Custom Properties ─────────────────────────────────── */
:root {
  --purple-600: #7C3AED;
  --purple-500: #8B5CF6;
  --purple-400: #A78BFA;
  --purple-100: #EDE9FE;
  --purple-50:  #F5F3FF;
  --blue-900:   #1E3A5F;
  --blue-700:   #1D4ED8;
  --blue-100:   #DBEAFE;
  --white:      #FFFFFF;
  --gray-50:    #F9FAFB;
  --gray-100:   #F3F4F6;
  --gray-200:   #E5E7EB;
  --gray-400:   #9CA3AF;
  --gray-600:   #4B5563;
  --gray-800:   #1F2937;
  --red-500:    #EF4444;
  --red-100:    #FEE2E2;
  --green-500:  #10B981;
  --green-100:  #D1FAE5;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.12);
  --shadow-xl:  0 16px 48px rgba(0,0,0,.14);

  --font:       'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition: 0.25s ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Utilities ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 80px 0; }
.section--alt { background: var(--gray-50); }
.section__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--blue-900);
  text-align: center;
  margin-bottom: 12px;
}
.section__sub {
  text-align: center;
  color: var(--gray-600);
  font-size: 1.05rem;
  margin-bottom: 48px;
}
.br-lg { display: none; }
@media (min-width: 768px) { .br-lg { display: block; } }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: var(--font);
  text-decoration: none;
  white-space: nowrap;
}
.btn--sm  { padding: 8px 18px;  font-size: .875rem; }
.btn--lg  { padding: 14px 28px; font-size: 1rem;    }
.btn--primary {
  background: var(--purple-600);
  color: var(--white);
  box-shadow: 0 4px 18px rgba(124,58,237,.35);
}
.btn--primary:hover {
  background: var(--purple-500);
  box-shadow: 0 6px 24px rgba(124,58,237,.45);
  transform: translateY(-1px);
}
.btn--ghost {
  background: rgba(255,255,255,.15);
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.4);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover {
  background: rgba(255,255,255,.25);
}
.btn--white {
  background: var(--white);
  color: var(--purple-600);
  font-weight: 700;
}
.btn--white:hover {
  background: var(--purple-50);
  transform: translateY(-1px);
}

/* ── Badges ────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.badge--alta  { background: var(--red-100);   color: var(--red-500); }
.badge--media { background: #FEF3C7;          color: #D97706; }
.badge--baixa { background: var(--green-100); color: var(--green-500); }

/* ── Fade-in animations ────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════════════
   NAV
═══════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  height: 64px;
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  color: var(--blue-900);
}
.nav__logo-icon { font-size: 1.3rem; }
.nav__logo strong { color: var(--purple-600); }
.nav .btn--sm {
  background: var(--purple-600);
  color: var(--white);
}
.nav .btn--sm:hover {
  background: var(--purple-500);
}

/* ═══════════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 80px;
  background: linear-gradient(135deg, var(--blue-900) 0%, #2D1B69 50%, var(--purple-600) 100%);
  overflow: hidden;
}

/* Background shapes */
.hero__bg-shapes { position: absolute; inset: 0; pointer-events: none; }
.shape {
  position: absolute;
  border-radius: 50%;
  opacity: .12;
  background: white;
}
.shape--1 { width: 500px; height: 500px; top: -150px; right: -150px; }
.shape--2 { width: 300px; height: 300px; bottom: -100px; left: -80px; }
.shape--3 { width: 200px; height: 200px; top: 40%; left: 30%; opacity: .06; }

/* Floating document silhouettes */
.doc-float {
  position: absolute;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
}
.doc-float--1 {
  width: 80px; height: 104px;
  top: 15%; right: 10%;
  transform: rotate(8deg);
  animation: floatA 6s ease-in-out infinite;
}
.doc-float--2 {
  width: 60px; height: 78px;
  top: 55%; right: 18%;
  transform: rotate(-5deg);
  animation: floatB 8s ease-in-out infinite;
}
.doc-float--3 {
  width: 48px; height: 64px;
  top: 30%; left: 8%;
  transform: rotate(12deg);
  animation: floatA 7s ease-in-out infinite reverse;
}
@keyframes floatA {
  0%, 100% { transform: rotate(8deg) translateY(0); }
  50%       { transform: rotate(8deg) translateY(-12px); }
}
@keyframes floatB {
  0%, 100% { transform: rotate(-5deg) translateY(0); }
  50%       { transform: rotate(-5deg) translateY(-8px); }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero__badge {
  display: inline-block;
  background: rgba(255,255,255,.15);
  color: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.25);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: .875rem;
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
}
.hero__headline {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero__sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.85);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero__sub strong { color: var(--white); }
.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero__note {
  color: rgba(255,255,255,.55);
  font-size: .875rem;
}

/* ═══════════════════════════════════════════════════════════
   DEMO
═══════════════════════════════════════════════════════════ */
.demo__mockup {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

/* Phone Mockup */
.phone-mockup__frame {
  width: 220px;
  background: var(--gray-800);
  border-radius: 32px;
  padding: 12px;
  box-shadow: var(--shadow-xl);
}
.phone-mockup__screen {
  background: var(--white);
  border-radius: 22px;
  overflow: hidden;
  min-height: 360px;
  display: flex;
  flex-direction: column;
}
.phone-mockup__bar {
  background: var(--gray-100);
  height: 28px;
  margin: 8px 8px 0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  padding: 0 8px;
  font-size: .6rem;
  color: var(--gray-400);
}
.phone-mockup__doc {
  flex: 1;
  background: #FFFDF5;
  margin: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  padding: 10px;
  position: relative;
  overflow: hidden;
}
.doc-lines { display: flex; flex-direction: column; gap: 5px; }
.doc-line {
  height: 5px;
  background: var(--gray-200);
  border-radius: 2px;
  width: 100%;
}
.doc-line--title { height: 8px; background: var(--gray-400); width: 70%; }
.doc-line--short { width: 55%; }
.doc-kanji {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}
.doc-kanji span {
  font-size: .7rem;
  color: var(--gray-600);
  background: var(--gray-100);
  padding: 2px 5px;
  border-radius: 3px;
}
.doc-stamp {
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 44px;
  height: 44px;
  border: 2px solid rgba(220,38,38,.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .55rem;
  color: rgba(220,38,38,.6);
  font-weight: 700;
  transform: rotate(-15deg);
}
.phone-mockup__upload-btn {
  margin: 6px 8px 8px;
  background: var(--purple-600);
  color: white;
  border-radius: var(--radius-sm);
  text-align: center;
  padding: 8px;
  font-size: .7rem;
  font-weight: 600;
}

/* Demo arrow */
.demo__arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.arrow-line {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--purple-400), var(--purple-600));
  position: relative;
}
.arrow-line::after {
  content: '';
  position: absolute;
  right: -6px; top: -4px;
  border-left: 8px solid var(--purple-600);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}
.arrow-pulse {
  background: var(--purple-100);
  color: var(--purple-600);
  font-size: .7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.05); }
}

/* AI Card */
.ai-card {
  width: 280px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.ai-card__header {
  background: linear-gradient(135deg, var(--blue-900), var(--purple-600));
  color: white;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .875rem;
  font-weight: 600;
}
.ai-card__icon { font-size: 1.1rem; }
.ai-card__body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.ai-field { display: flex; align-items: flex-start; gap: 8px; }
.ai-field--block { flex-direction: column; gap: 4px; }
.ai-field__label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--gray-400);
  white-space: nowrap;
  min-width: 70px;
}
.ai-field--block .ai-field__label { min-width: unset; }
.ai-field__value {
  font-size: .82rem;
  color: var(--gray-800);
}
.ai-card__footer {
  padding: 8px 16px;
  background: var(--gray-50);
  font-size: .68rem;
  color: var(--gray-400);
  text-align: center;
  border-top: 1px solid var(--gray-200);
}

/* ═══════════════════════════════════════════════════════════
   PROBLEMS
═══════════════════════════════════════════════════════════ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card__icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}
.card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 10px;
}
.card__desc {
  color: var(--gray-600);
  font-size: .9rem;
  line-height: 1.65;
}

/* ═══════════════════════════════════════════════════════════
   STEPS
═══════════════════════════════════════════════════════════ */
.steps__grid {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.step {
  flex: 1;
  min-width: 200px;
  max-width: 280px;
  text-align: center;
  padding: 32px 20px;
  position: relative;
}
.step__number {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--purple-600);
  color: white;
  font-weight: 800;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 12px rgba(124,58,237,.35);
}
.step__icon { font-size: 2.5rem; margin-bottom: 12px; }
.step__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 10px;
}
.step__desc { color: var(--gray-600); font-size: .875rem; line-height: 1.6; }
.step__connector {
  font-size: 1.5rem;
  color: var(--purple-400);
  align-self: center;
  padding: 0 4px;
  font-weight: 300;
}
@media (max-width: 640px) {
  .step__connector { display: none; }
  .steps__grid { flex-direction: column; align-items: center; }
  .step { max-width: 100%; }
}

/* ═══════════════════════════════════════════════════════════
   DOCUMENT TYPES
═══════════════════════════════════════════════════════════ */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.tag {
  background: var(--white);
  border: 1.5px solid var(--purple-200, #DDD6FE);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: .875rem;
  color: var(--blue-900);
  font-weight: 600;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tag em {
  font-style: normal;
  font-weight: 400;
  color: var(--gray-600);
  font-size: .8rem;
}
.tag:hover {
  background: var(--purple-50);
  border-color: var(--purple-400);
  transform: translateY(-1px);
}
.tag--more {
  background: var(--purple-100);
  color: var(--purple-600);
  border-color: var(--purple-400);
}

/* ═══════════════════════════════════════════════════════════
   EXAMPLE RESPONSE
═══════════════════════════════════════════════════════════ */
.example__card {
  max-width: 680px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.example__source {
  background: linear-gradient(135deg, var(--blue-900), var(--purple-600));
  color: white;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .95rem;
  font-weight: 600;
}
.example__source-icon { font-size: 1.2rem; }
.example__grid {
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.example__field { display: flex; flex-direction: column; gap: 4px; }
.example__field--full { grid-column: 1 / -1; }
.example__label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.example__value {
  font-size: .9rem;
  color: var(--gray-800);
  line-height: 1.5;
}
.example__disclaimer {
  padding: 12px 24px;
  background: #FFFBEB;
  font-size: .78rem;
  color: #92400E;
  border-top: 1px solid #FDE68A;
}
@media (max-width: 500px) {
  .example__grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════
   SECURITY
═══════════════════════════════════════════════════════════ */
.security__card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  margin-bottom: 24px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.security__icon { font-size: 2rem; flex-shrink: 0; }
.security__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--blue-900);
  margin-bottom: 8px;
}
.security__text { color: var(--gray-600); font-size: .9rem; line-height: 1.6; }

.disclaimer {
  max-width: 700px;
  margin: 0 auto;
  background: #FFF7ED;
  border: 1.5px solid #FED7AA;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: .875rem;
  color: #7C2D12;
  line-height: 1.65;
}

/* ═══════════════════════════════════════════════════════════
   BETA FORM
═══════════════════════════════════════════════════════════ */
.beta {
  position: relative;
  overflow: hidden;
  padding: 80px 0;
}
.beta__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--blue-900) 0%, #3B1F8C 50%, var(--purple-600) 100%);
  z-index: 0;
}
.beta .container { position: relative; z-index: 1; }
.beta__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 768px) {
  .beta__inner { grid-template-columns: 1fr; }
}
.beta__tag {
  display: inline-block;
  background: rgba(255,255,255,.15);
  color: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.25);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: .8rem;
  margin-bottom: 16px;
}
.beta__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}
.beta__desc {
  color: rgba(255,255,255,.8);
  font-size: 1.05rem;
  margin-bottom: 24px;
}
.beta__perks { display: flex; flex-direction: column; gap: 8px; }
.beta__perks li {
  color: rgba(255,255,255,.9);
  font-size: .9rem;
}

/* Form */
.beta-form {
  background: rgba(255,255,255,.1);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  color: rgba(255,255,255,.9);
  font-size: .875rem;
  font-weight: 600;
}
.form-group input,
.form-group select {
  background: rgba(255,255,255,.15);
  border: 1.5px solid rgba(255,255,255,.25);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  font-size: .95rem;
  color: white;
  font-family: var(--font);
  transition: border-color var(--transition), background var(--transition);
  outline: none;
  width: 100%;
}
.form-group input::placeholder { color: rgba(255,255,255,.45); }
.form-group input:focus,
.form-group select:focus {
  border-color: rgba(255,255,255,.6);
  background: rgba(255,255,255,.2);
}
.form-group select option { color: var(--gray-800); background: white; }
.form-error {
  font-size: .78rem;
  color: #FCA5A5;
  min-height: 1em;
}
.form-group.has-error input,
.form-group.has-error select {
  border-color: #FCA5A5;
}

/* Success state */
.beta-success {
  background: rgba(255,255,255,.1);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-xl);
  padding: 48px 32px;
  text-align: center;
  color: white;
}
.beta-success__icon { font-size: 3rem; margin-bottom: 16px; }
.beta-success h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.beta-success p { color: rgba(255,255,255,.8); }

/* ═══════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════ */
.footer {
  background: var(--blue-900);
  padding: 28px 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.7);
  font-size: .9rem;
}
.footer__brand strong { color: var(--purple-400); }
.footer__brand .nav__logo-icon { font-size: 1.1rem; }
.footer__copy {
  color: rgba(255,255,255,.4);
  font-size: .8rem;
}
.footer__links {
  display: flex;
  gap: 20px;
}
.footer__links a {
  color: rgba(255,255,255,.55);
  font-size: .85rem;
  transition: color var(--transition);
}
.footer__links a:hover { color: rgba(255,255,255,.9); }

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE FINE-TUNING
═══════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .demo__mockup { gap: 20px; }
  .demo__arrow { flex-direction: column; }
  .arrow-line { width: 2px; height: 32px; }
  .arrow-line::after {
    right: unset; top: unset;
    bottom: -6px; left: -4px;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 8px solid var(--purple-600);
  }
  .ai-card { width: 260px; }
  .footer__inner { flex-direction: column; text-align: center; }
  .footer__brand { flex-direction: column; gap: 4px; }
  .security__card { flex-direction: column; }
}

@media (max-width: 400px) {
  .phone-mockup__frame { width: 180px; }
  .ai-card { width: 240px; }
}