/* ============================================
   ÁTOMOS CHAT — Landing Page Styles
   Dark theme + Green neon (#00E85F)
   ============================================ */

/* --- Design Tokens --- */
:root {
  --color-bg: #0A0A0A;
  --color-bg-alt: #111111;
  --color-bg-card: #161616;
  --color-bg-card-hover: #1a1a1a;
  --color-surface: #1E1E1E;
  --color-border: #2A2A2A;
  --color-border-light: #333333;

  --color-text: #F5F5F5;
  --color-text-secondary: #A0A0A0;
  --color-text-muted: #666666;

  --color-primary: #00E85F;
  --color-primary-dark: #00C04F;
  --color-primary-glow: rgba(0, 232, 95, 0.15);
  --color-primary-glow-strong: rgba(0, 232, 95, 0.3);

  --color-danger: #FF4444;
  --color-danger-bg: rgba(255, 68, 68, 0.1);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-glow: 0 0 30px rgba(0, 232, 95, 0.2);
  --shadow-glow-strong: 0 0 60px rgba(0, 232, 95, 0.3);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, #00FF88 50%, #88FFB8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Section Commons --- */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(0, 232, 95, 0.2);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #000;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn--ghost {
  border: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn--full {
  width: 100%;
}

/* --- HEADER --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition);
}

.header--scrolled {
  background: rgba(10, 10, 10, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.header__logo strong {
  color: var(--color-primary);
}

.header__logo-icon {
  flex-shrink: 0;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header__nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

.header__nav a:hover {
  color: var(--color-primary);
}

.header__cta {
  font-size: 0.875rem;
  padding: 0.5rem 1.25rem;
}

.header__menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

.header__menu span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- HERO --- */
.hero {
  position: relative;
  padding: 8rem 0 5rem;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__bg-glow {
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-glow);
  border: 1px solid rgba(0, 232, 95, 0.2);
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-xl);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  max-width: 520px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.hero__proof {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.hero__proof-item {
  text-align: center;
}

.hero__proof-item strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
}

.hero__proof-item span {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.hero__proof-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* Hero Phone Mockup */
.hero__visual {
  display: flex;
  justify-content: center;
}

.hero__phone {
  width: 320px;
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-glow), 0 25px 60px rgba(0, 0, 0, 0.5);
  animation: floatPhone 6s ease-in-out infinite;
}

@keyframes floatPhone {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero__phone-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.hero__phone-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #00FF88);
  flex-shrink: 0;
}

.hero__phone-name {
  font-size: 0.875rem;
  font-weight: 600;
}

.hero__phone-status {
  font-size: 0.75rem;
  color: var(--color-primary);
}

.hero__phone-messages {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.hero__msg {
  max-width: 85%;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.hero__msg--received {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  align-self: flex-start;
  border-bottom-left-radius: var(--space-xs);
}

.hero__msg--sent {
  background: linear-gradient(135deg, rgba(0, 232, 95, 0.15), rgba(0, 232, 95, 0.05));
  border: 1px solid rgba(0, 232, 95, 0.2);
  align-self: flex-end;
  border-bottom-right-radius: var(--space-xs);
}

.hero__msg--ai {
  position: relative;
}

.hero__msg-ai-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

/* --- PROBLEM SECTION --- */
.problem {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.problem__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.problem__card {
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.problem__card:hover {
  border-color: rgba(255, 68, 68, 0.3);
  transform: translateY(-2px);
}

.problem__card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.problem__card-icon--danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.problem__card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.problem__card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- SOLUTION SECTION --- */
.solution {
  padding: var(--space-4xl) 0;
}

.solution__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.solution__card {
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.solution__card:hover {
  border-color: rgba(0, 232, 95, 0.3);
  box-shadow: 0 0 40px rgba(0, 232, 95, 0.05);
  transform: translateY(-2px);
}

.solution__card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.solution__card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.solution__card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- FEATURES SECTION --- */
.features {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.features__list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.features__item {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.features__item:hover {
  border-color: rgba(0, 232, 95, 0.3);
  transform: translateX(4px);
}

.features__item-number {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-primary);
  opacity: 0.3;
  line-height: 1;
  flex-shrink: 0;
  width: 60px;
}

.features__item-content h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.features__item-content p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- TESTIMONIALS --- */
.testimonials {
  padding: var(--space-4xl) 0;
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.testimonials__card {
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.testimonials__card:hover {
  border-color: rgba(0, 232, 95, 0.2);
}

.testimonials__stars {
  color: #FFD700;
  font-size: 1rem;
  margin-bottom: var(--space-md);
  letter-spacing: 2px;
}

.testimonials__card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-style: italic;
  margin-bottom: var(--space-lg);
}

.testimonials__author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.testimonials__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #00FF88);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  color: #000;
  flex-shrink: 0;
}

.testimonials__author strong {
  display: block;
  font-size: 0.875rem;
}

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

/* --- COMPARISON TABLE --- */
.comparison {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.comparison__table-wrapper {
  overflow-x: auto;
}

.comparison__table {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.comparison__table th,
.comparison__table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comparison__table thead th {
  font-weight: 700;
  font-size: 1rem;
  padding-bottom: var(--space-lg);
}

.comparison__col--bad {
  color: var(--color-danger);
}

.comparison__col--good {
  color: var(--color-primary);
  font-weight: 600;
}

.comparison__table tbody tr {
  transition: background var(--transition);
}

.comparison__table tbody tr:hover {
  background: rgba(0, 232, 95, 0.03);
}

/* --- FAQ --- */
.faq {
  padding: var(--space-4xl) 0;
}

.faq__list {
  max-width: 750px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.faq__item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq__item[open] {
  border-color: rgba(0, 232, 95, 0.3);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}

.faq__question::-webkit-details-marker { display: none; }

.faq__question:hover {
  color: var(--color-primary);
}

.faq__chevron {
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq__item[open] .faq__chevron {
  transform: rotate(180deg);
}

.faq__answer {
  padding: 0 var(--space-lg) var(--space-lg);
}

.faq__answer p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- CTA SECTION --- */
.cta-section {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.cta__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.cta__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.cta__desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.cta__checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cta__checklist li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 500;
}

/* CTA Form */
.cta__form {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-glow), 0 20px 50px rgba(0, 0, 0, 0.3);
}

.cta__form-title {
  font-size: 1.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xl);
}

.cta__form-group {
  margin-bottom: var(--space-md);
}

.cta__form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.cta__form-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: var(--font-family);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.cta__form-group input::placeholder {
  color: var(--color-text-muted);
}

.cta__form-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.cta__form button[type="submit"] {
  margin-top: var(--space-md);
}

.cta__form-disclaimer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* --- FOOTER --- */
.footer {
  padding: var(--space-3xl) 0 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-2xl);
}

.footer__brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-top: var(--space-md);
  max-width: 320px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--color-border);
}

.footer__bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* --- WHATSAPP FLOAT --- */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: 90;
  transition: all var(--transition);
  animation: bounceFloat 3s ease-in-out infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

@keyframes bounceFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* --- GSAP visibility helper --- */
.gsap-hidden {
  visibility: hidden;
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__subtitle {
    max-width: 100%;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__proof {
    justify-content: center;
  }

  .hero__visual {
    display: none;
  }

  .solution__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .header__nav.active {
    display: flex;
  }

  .header__cta {
    display: none;
  }

  .header__menu {
    display: flex;
  }

  .hero {
    padding: 6rem 0 3rem;
    min-height: auto;
  }

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

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

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

  .features__item {
    flex-direction: column;
    gap: var(--space-md);
  }

  .features__item-number {
    width: auto;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 480px) {
  .hero__proof {
    flex-direction: column;
    gap: var(--space-md);
  }

  .hero__proof-divider {
    width: 40px;
    height: 1px;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }
}

/* --- PREFERS REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }
}