body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #f8fafc 0%, #e0ecff 100%);
  color: #222;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 3vw;
  background: #153958;
  color: #fff;
}

.logo {
  font-size: 2rem;
  font-weight: bold;
}
.logo span {
  color: #60a5fa;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}
nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: border 0.3s;
}
nav ul li a.active,
nav ul li a:hover {
  border-bottom: 2px solid #60a5fa;
}

.hero,
.about-hero,
.contact-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 3rem 5vw 2rem 5vw;
  background: linear-gradient(120deg, #60a5fa20 0%, #15395810 100%);
}

.hero-text {
  flex: 1 1 320px;
  min-width: 280px;
  margin-right: 2rem;
}
.hero-text h1 {
  font-size: 2.7rem;
  font-weight: bold;
  margin: 0 0 1rem 0;
}
.hero-text h1 span {
  color: #60a5fa;
  text-shadow: 1px 1px 4px #15395833;
}
.hero-text p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.hero-img {
  flex: 1 1 260px;
  min-width: 220px;
  text-align: center;
}
.hero-img img {
  width: 85%;
  max-width: 350px;
  border-radius: 2rem;
  box-shadow: 0 6px 24px 0 #60a5fa44;
}

form#trackForm {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
form#trackForm input {
  flex: 1;
  padding: 0.85rem;
  border: 1px solid #60a5fa;
  border-radius: 8px;
  font-size: 1rem;
}
form#trackForm button {
  padding: 0.85rem 1.5rem;
  background: #60a5fa;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.2s;
}
form#trackForm button:hover {
  background: #153958;
}

#tracking-result {
  margin-top: 0.5rem;
  font-size: 1.1rem;
  color: #22a63a;
  min-height: 1.5em;
}

.features {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 3rem 5vw;
}
.features > div {
  flex: 1 1 320px;
  min-width: 260px;
  margin: 1rem;
}
.features ul {
  list-style: disc;
  margin-left: 1.2em;
  font-size: 1.1rem;
  line-height: 1.7;
}
.features img {
  width: 100%;
  max-width: 350px;
  margin-top: 1rem;
  border-radius: 1.2rem;
  box-shadow: 0 4px 18px #60a5fa33;
}

.testimonials {
  background: linear-gradient(120deg, #e0ecff 0%, #f8fafc 100%);
  padding: 2.5rem 0;
  text-align: center;
}
.testimonials h2 {
  font-size: 2rem;
  color: #153958;
}
.testimonial-slider {
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  min-height: 130px;
  margin: 1.2rem 0;
}
.testimonial {
  display: none;
  flex-direction: column;
  align-items: center;
  max-width: 540px;
  margin: auto;
  font-size: 1.1rem;
  background: #fff;
  padding: 1.3rem 1.7rem;
  border-radius: 1.2rem;
  box-shadow: 0 2px 10px #15395817;
  animation: fadeIn 0.6s;
}
.testimonial.active {
  display: flex;
}
.testimonial span {
  margin-top: 1rem;
  color: #60a5fa;
  font-weight: bold;
}
.testimonial-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
}
.testimonial-controls button {
  background: #60a5fa;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s;
}
.testimonial-controls button:hover {
  background: #153958;
}

footer {
  background: #153958;
  color: #fff;
  padding: 1rem 0;
  text-align: center;
  margin-top: 2rem;
  font-size: 0.95rem;
}

.about-content {
  padding: 2.5rem 8vw;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}
.about-content h2 {
  color: #60a5fa;
}
.about-graphics {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.about-graphics img {
  width: 90px;
  height: 90px;
}
.about-graphics .highlight {
  font-style: italic;
  font-size: 1.1rem;
}
.about-style {
  background: #60a5fa10;
  padding: 1.5rem;
  border-radius: 1.2rem;
  box-shadow: 0 2px 12px #60a5fa11;
}
.colorful {
  color: #f97316;
  font-weight: bold;
}
.fancy-text {
  font-family: 'Caveat', cursive;
  font-size: 1.1em;
  color: #16a34a;
}
.flexible {
  color: #2563eb;
  font-style: italic;
  font-weight: bold;
}

.contact-section {
  display: flex;
  gap: 3rem;
  justify-content: center;
  padding: 2rem 5vw;
}
.contact-form {
  flex: 1 1 340px;
  background: #fff;
  border-radius: 1.1rem;
  box-shadow: 0 2px 16px #15395813;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-form input,
.contact-form textarea {
  padding: 0.8rem;
  border: 1px solid #60a5fa;
  border-radius: 8px;
  font-size: 1rem;
}
.contact-form textarea {
  min-height: 90px;
  resize: vertical;
}
.contact-form button {
  align-self: flex-end;
  background: #60a5fa;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.8rem 1.5rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}
.contact-form button:hover {
  background: #153958;
}
#contact-result {
  margin-top: 0.5rem;
  font-size: 1.1rem;
  color: #22a63a;
  min-height: 1.5em;
}

.contact-info {
  flex: 1 1 220px;
  background: #60a5fa10;
  border-radius: 1.1rem;
  padding: 2rem;
  min-width: 200px;
}
.contact-info h2 {
  margin-top: 0;
  color: #153958;
}

@media (max-width: 900px) {
  .hero, .features, .contact-section {
    flex-direction: column;
    gap: 2rem;
    padding: 2rem 2vw;
  }
  .about-content {
    padding: 2.5rem 2vw;
  }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px);}
  to { opacity: 1; transform: translateY(0);}
}

popup-overlay {
  position:fixed; left:0; top:0; width:100vw; height:100vh;
  background:rgba(0,0,0,0.3); z-index: 100;
}
.popup {
  position:fixed; left:50%; top:50%; transform:translate(-50%,-50%);
  background:#fff; border-radius:8px; box-shadow:0 2px 16px #0003;
  padding:2em; z-index:101; min-width:300px;
}