/* ==========================================================================
   ATEND.IA — LANDING PAGE DESIGN SYSTEM (VANILLA CSS)
   Aesthetics: Sleek Dark Mode, Deep Gradients, Glassmorphism, Micro-animations
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-main: #07090e;
  --bg-surface: #0d121d;
  --bg-card: rgba(18, 24, 38, 0.7);
  --bg-card-hover: rgba(26, 35, 56, 0.85);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 210, 255, 0.3);
  
  --primary: #00d2ff;
  --primary-gradient: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
  --accent-purple: #9d4edd;
  --accent-emerald: #00f5d4;
  --accent-gradient: linear-gradient(135deg, #9d4edd 0%, #00d2ff 100%);
  
  --text-main: #f0f4f8;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing & Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Ambient Glows */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.18;
}

.glow-orb-1 {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, #00d2ff 0%, transparent 70%);
  top: -150px;
  right: -100px;
  animation: pulseOrb 12s infinite alternate ease-in-out;
}

.glow-orb-2 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #9d4edd 0%, transparent 70%);
  bottom: 10%;
  left: -150px;
  animation: pulseOrb 15s infinite alternate-reverse ease-in-out;
}

.glow-orb-3 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #00f5d4 0%, transparent 70%);
  top: 45%;
  right: 15%;
  opacity: 0.12;
}

@keyframes pulseOrb {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.15) translate(40px, 30px); }
}

/* Base Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-purple {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Section Header Shared */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.12rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.98rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #07090e;
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 210, 255, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 9, 14, 0.75);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #07090e;
  font-weight: 800;
  font-size: 1.3rem;
  box-shadow: 0 2px 14px rgba(0, 210, 255, 0.4);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-name span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  padding: 100px 0 80px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 60px;
}

.hero-content {
  max-width: 620px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 245, 212, 0.08);
  border: 1px solid rgba(0, 245, 212, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-emerald);
  margin-bottom: 24px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: 1.18rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-metrics {
  display: flex;
  align-items: center;
  gap: 36px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-number {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-main);
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ==========================================================================
   PHONE MOCKUP & LIVE CHAT SIMULATOR
   ========================================================================== */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 100%;
  max-width: 380px;
  background: #0f1522;
  border: 8px solid #1a2233;
  border-radius: 40px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8),
              0 0 40px rgba(0, 210, 255, 0.15);
  overflow: hidden;
  position: relative;
}

.phone-notch {
  height: 24px;
  background: #1a2233;
  display: flex;
  justify-content: center;
  align-items: center;
}

.notch-pill {
  width: 60px;
  height: 6px;
  background: #0b0e17;
  border-radius: var(--radius-full);
}

.chat-header {
  background: #151d2c;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #07090e;
  font-weight: 700;
  font-size: 0.95rem;
}

.chat-info h4 {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.2;
}

.chat-status {
  font-size: 0.72rem;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 4px;
}

.chat-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

.chat-body {
  height: 380px;
  background: radial-gradient(circle at top right, #131b2e 0%, #0c101a 100%);
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Chat Messages */
.message {
  max-width: 84%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.88rem;
  line-height: 1.4;
  position: relative;
  word-break: break-word;
  animation: fadeIn 0.3s ease-out;
}

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

.message.bot {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border-bottom-left-radius: 4px;
}

.message.user {
  align-self: flex-end;
  background: var(--primary-gradient);
  color: #07090e;
  font-weight: 500;
  border-bottom-right-radius: 4px;
}

.message-time {
  display: block;
  font-size: 0.65rem;
  margin-top: 4px;
  opacity: 0.7;
  text-align: right;
}

.chat-footer {
  padding: 10px 12px;
  background: #151d2c;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-input {
  flex: 1;
  background: #0d121d;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 8px 14px;
  color: var(--text-main);
  font-size: 0.85rem;
  outline: none;
}

.chat-input:focus {
  border-color: var(--primary);
}

.chat-send {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-gradient);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #07090e;
  font-size: 0.9rem;
  transition: transform var(--transition-fast);
}

.chat-send:hover {
  transform: scale(1.08);
}

/* ==========================================================================
   PROBLEM VS SOLUTION SECTION
   ========================================================================== */
.comparison-section {
  padding: 100px 0;
  border-top: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, transparent 0%, rgba(13, 18, 29, 0.6) 100%);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.comp-card {
  padding: 40px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.comp-card.problem {
  background: rgba(239, 68, 68, 0.03);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.comp-card.solution {
  background: rgba(0, 210, 255, 0.04);
  border: 1px solid rgba(0, 210, 255, 0.3);
  box-shadow: 0 0 35px rgba(0, 210, 255, 0.1);
}

.comp-badge {
  display: inline-block;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 20px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.problem .comp-badge {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

.solution .comp-badge {
  background: rgba(0, 210, 255, 0.15);
  color: var(--primary);
}

.comp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.comp-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1.02rem;
  color: var(--text-muted);
}

.comp-icon {
  font-size: 1.1rem;
  line-height: 1.4;
}

/* ==========================================================================
   SERVICES & NICHES SECTION
   ========================================================================== */
.services-section {
  padding: 100px 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: 0 15px 35px -10px rgba(0, 210, 255, 0.15);
}

.service-icon-box {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: rgba(0, 210, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  margin-bottom: 22px;
  border: 1px solid rgba(0, 210, 255, 0.2);
}

.service-card h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 20px;
  flex: 1;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-tags span {
  font-size: 0.78rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  color: var(--text-dim);
}

/* ==========================================================================
   PRICING PLANS
   ========================================================================== */
.pricing-section {
  padding: 100px 0;
  background: radial-gradient(ellipse at center, rgba(13, 18, 29, 0.8) 0%, var(--bg-main) 100%);
}

.billing-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.toggle-switch {
  width: 56px;
  height: 28px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.toggle-slider {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  top: 3px;
  left: 3px;
  transition: transform var(--transition-normal);
}

.billing-toggle.yearly .toggle-slider {
  transform: translateX(28px);
}

.discount-badge {
  background: rgba(0, 245, 212, 0.15);
  color: var(--accent-emerald);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
  position: relative;
  transition: all var(--transition-normal);
}

.price-card.featured {
  border-color: var(--primary);
  background: rgba(18, 24, 42, 0.9);
  box-shadow: 0 0 40px rgba(0, 210, 255, 0.2);
  transform: scale(1.04);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #07090e;
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 12px rgba(0, 210, 255, 0.4);
}

.price-header {
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.plan-description {
  color: var(--text-dim);
  font-size: 0.88rem;
}

.price-box {
  margin-bottom: 28px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 600;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
}

.price-period {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex: 1;
}

.price-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.price-features li span {
  color: var(--accent-emerald);
}

/* ==========================================================================
   FAQ SECTION (ACCORDION)
   ========================================================================== */
.faq-section {
  padding: 100px 0;
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: var(--font-heading);
  font-size: 1.12rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.faq-toggle-icon {
  font-size: 1.4rem;
  transition: transform var(--transition-normal);
  color: var(--primary);
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, padding 0.3s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  padding: 0 26px 22px 26px;
}

/* ==========================================================================
   FINAL CTA
   ========================================================================== */
.cta-section {
  padding: 80px 0 120px 0;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.15) 0%, rgba(157, 78, 221, 0.15) 100%);
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: 70px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.cta-banner h2 {
  font-size: 2.8rem;
  margin-bottom: 18px;
}

.cta-banner p {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 36px auto;
}

.cta-banner .btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 30px 0;
  background: #05070a;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 30px;
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }
  
  .hero-content {
    max-width: 100%;
  }

  .hero-actions, .hero-metrics {
    justify-content: center;
  }
  
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin: 0 auto;
  }

  .price-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-title {
    font-size: 2.6rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .cta-banner h2 {
    font-size: 2.1rem;
  }
}