/* === Variables y Reset === */
:root {
  --primary: #1a3a6b;
  --primary-light: #2980b9;
  --primary-dark: #0f2444;
  --accent: #27ae60;
  --bg: #ffffff;
  --bg-alt: #f4f6f8;
  --text: #2c3e50;
  --text-light: #6c7a89;
  --border: #dde1e6;
  --danger: #c0392b;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --radius: 8px;
  --transition: 0.3s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-align: center;
}

.btn--primary {
  background: var(--primary-light);
  color: #fff;
  border-color: var(--primary-light);
}

.btn--primary:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--primary-light);
  border-color: var(--primary-light);
}

.btn--outline:hover {
  background: var(--primary-light);
  color: #fff;
}

.btn--lg {
  padding: 14px 36px;
  font-size: 1.1rem;
}

.btn--nav {
  padding: 8px 20px;
  font-size: 0.9rem;
}

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  box-shadow: var(--shadow);
  transition: background var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.header__logo-img {
  height: 48px;
  width: auto;
  display: block;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header__nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.header__toggle span {
  width: 26px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* === Hero === */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: #fff;
  padding: 160px 0 100px;
  text-align: center;
}

.hero__logo {
  max-width: 500px;
  height: auto;
  margin-bottom: 28px;
}

.hero__subtitle {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 36px;
  opacity: 0.9;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero .btn--outline {
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

.hero .btn--outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
}

.hero__tagline {
  font-size: 1rem;
  font-style: italic;
  opacity: 0.75;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero__badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.badge {
  background: rgba(255,255,255,0.15);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* === Sections === */
.section {
  padding: 80px 0;
}

.section--alt {
  background: var(--bg-alt);
}

.section__title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.section__desc {
  text-align: center;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 48px;
  font-size: 1.1rem;
}

/* === Comparison === */
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.comparison__col {
  padding: 32px;
  border-radius: var(--radius);
}

.comparison__col h3 {
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.comparison__col ul {
  list-style: none;
}

.comparison__col li {
  padding: 8px 0;
  padding-left: 28px;
  position: relative;
}

.comparison__col li::before {
  position: absolute;
  left: 0;
  font-size: 1.1rem;
}

.comparison__col--problem {
  background: #fdf2f2;
  border: 1px solid #f5c6c6;
}

.comparison__col--problem h3 {
  color: var(--danger);
}

.comparison__col--problem li::before {
  content: "\2717";
  color: var(--danger);
}

.comparison__col--solution {
  background: #eafaf1;
  border: 1px solid #a9dfbf;
}

.comparison__col--solution h3 {
  color: var(--accent);
}

.comparison__col--solution li::before {
  content: "\2713";
  color: var(--accent);
}

/* === Features Grid === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card__icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.05rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* === Users Grid === */
.users-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.user-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.user-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.user-card__icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.user-card h3 {
  font-size: 0.95rem;
  color: var(--primary);
  margin-bottom: 6px;
}

.user-card p {
  font-size: 0.82rem;
  color: var(--text-light);
}

/* === Benefits === */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit {
  padding: 28px;
}

.benefit__number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-light);
  opacity: 0.3;
  margin-bottom: 8px;
}

.benefit h3 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.benefit p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* === Pricing === */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.pricing-card--featured {
  border-color: var(--primary-light);
  box-shadow: 0 4px 24px rgba(41,128,185,0.15);
  transform: scale(1.04);
}

.pricing-card--featured:hover {
  transform: scale(1.04) translateY(-4px);
}

.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-light);
  color: #fff;
  padding: 4px 16px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}

.pricing-card__name {
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.pricing-card__desc {
  color: var(--text-light);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.pricing-card__features {
  text-align: left;
  margin-bottom: 28px;
}

.pricing-card__features li {
  padding: 6px 0;
  padding-left: 24px;
  position: relative;
  font-size: 0.9rem;
  color: var(--text);
}

.pricing-card__features li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* === Contact Form === */
.contact-form {
  max-width: 720px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: var(--bg);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(41,128,185,0.12);
}

.form-group textarea {
  resize: vertical;
}

.contact-form .btn {
  width: 100%;
  margin-top: 8px;
}

.form-message {
  margin-top: 16px;
  padding: 12px;
  border-radius: var(--radius);
  text-align: center;
  display: none;
  font-weight: 500;
}

.form-message--success {
  display: block;
  background: #eafaf1;
  color: var(--accent);
  border: 1px solid #a9dfbf;
}

.form-message--error {
  display: block;
  background: #fdf2f2;
  color: var(--danger);
  border: 1px solid #f5c6c6;
}

/* === Footer === */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding-top: 60px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer__logo-img {
  height: 56px;
  width: auto;
  margin-bottom: 14px;
  display: block;
}

.footer__brand p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer__olisan {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}

.footer__olisan-img {
  height: 32px;
  width: auto;
  border-radius: 4px;
}

.footer__links h4,
.footer__legal h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 1rem;
}

.footer__links a,
.footer__legal a {
  display: block;
  color: rgba(255,255,255,0.7);
  padding: 4px 0;
  font-size: 0.9rem;
}

.footer__links a:hover,
.footer__legal a:hover {
  color: #fff;
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 14px 24px;
  border-radius: var(--radius);
  color: #fff;
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease;
  pointer-events: none;
}

.toast--visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.toast--success {
  background: var(--accent);
}

.toast--error {
  background: var(--danger);
}

/* === Fade-in Animation === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 768px) {
  .header__toggle {
    display: flex;
  }

  .header__nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    box-shadow: var(--shadow);
  }

  .header__nav--open {
    display: flex;
  }

  .hero {
    padding: 130px 0 70px;
  }

  .hero__logo {
    max-width: 300px;
  }

  .hero__subtitle {
    font-size: 1.05rem;
  }

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

  .features-grid,
  .benefits-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .pricing-card--featured:hover {
    transform: translateY(-4px);
  }

  .section__title {
    font-size: 1.7rem;
  }
}

@media (max-width: 480px) {
  .hero__title {
    font-size: 1.6rem;
  }

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

  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
}