/*
  InfraMap.ai Landing Page Styles
  This stylesheet defines the look and feel of the InfraMap.ai landing page.
  Colours and fonts are declared as CSS variables for easy theme tuning.
*/

:root {
  /* Colour palette */
  --colour-primary: #f25f4c; /* warm orange for accents and buttons */
  --colour-secondary: #14213d; /* deep navy for cards and highlights */
  --colour-background: #0a192f; /* dark blue for page background */
  --colour-surface: #112240; /* medium dark for sections */
  --colour-text: #e5e5e5; /* light grey for general text */
  --colour-heading: #ffffff; /* white for headings */
  --colour-accent: #f3a712; /* golden accent used sparingly */

  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --container-max-width: 1200px;
  --section-padding: 4rem;
  --card-radius: 0.75rem;
}

/* Global resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--colour-background);
  color: var(--colour-text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--colour-accent);
}

.container {
  width: 90%;
  max-width: var(--container-max-width);
  margin: 0 auto;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background-color: rgba(10, 25, 47, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--colour-heading);
}

.logo .accent {
  color: var(--colour-primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--colour-text);
  position: relative;
  padding: 0.25rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 0;
  height: 2px;
  background-color: var(--colour-primary);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-image: url('../images/heatmap.png');
  background-size: cover;
  background-position: center;
}

/* Overlay to darken the hero background for legibility */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(10, 25, 47, 0.9) 0%,
    rgba(10, 25, 47, 0.7) 50%,
    rgba(10, 25, 47, 0.9) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  line-height: 1.2;
  color: var(--colour-heading);
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(229, 229, 229, 0.85);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 2rem;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn-primary {
  background-color: var(--colour-primary);
  color: var(--colour-heading);
}

.btn-primary:hover {
  background-color: var(--colour-accent);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  border: 2px solid var(--colour-primary);
  color: var(--colour-primary);
}

.btn-secondary:hover {
  background-color: var(--colour-primary);
  color: var(--colour-heading);
}

/* Sections */
.section {
  padding: var(--section-padding) 0;
}

.section h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  color: var(--colour-heading);
  text-align: center;
}

.section-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}

.text-column {
  flex: 1 1 50%;
  max-width: 600px;
}

.text-column h2 {
  text-align: left;
}

.text-column p {
  margin-bottom: 1rem;
  color: rgba(229, 229, 229, 0.9);
  font-size: 1rem;
}

.image-column {
  flex: 1 1 45%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-column img {
  max-width: 100%;
  border-radius: var(--card-radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Technology section */
.technology {
  background-color: var(--colour-surface);
}

.technology .cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 2rem;
}

.technology .card {
  background-color: var(--colour-secondary);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  flex: 1 1 30%;
  min-width: 240px;
  color: var(--colour-text);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.technology .card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--colour-primary);
  margin-bottom: 0.5rem;
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--colour-heading);
}

.card p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: rgba(229, 229, 229, 0.9);
}

.technology-image {
  margin-top: 2rem;
  text-align: center;
}

.technology-image img {
  max-width: 80%;
  border-radius: var(--card-radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Foundation section */
.foundation {
  background-color: var(--colour-background);
}

.foundation .text-column p {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: rgba(229, 229, 229, 0.9);
}

.foundation .image-column img {
  max-width: 100%;
  border-radius: var(--card-radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Integrations section */
.integrations {
  background-color: var(--colour-surface);
}

.integrations .intro {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  margin-bottom: 2rem;
  color: rgba(229, 229, 229, 0.9);
  font-size: 1rem;
}

.integrations .cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

.integrations .card.small-card {
  flex: 1 1 calc(50% - 2rem);
  max-width: 260px;
  background-color: var(--colour-secondary);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.integrations .card.small-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
}

.integrations .card.small-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--colour-heading);
}

.integrations .card.small-card p {
  font-size: 0.9rem;
  color: rgba(229, 229, 229, 0.9);
  line-height: 1.5;
}

/* Contact section */
.contact {
  background-color: var(--colour-background);
}

.contact h2 {
  margin-bottom: 0.5rem;
}

.contact p {
  max-width: 600px;
  margin: 0 auto 2rem auto;
  text-align: center;
  color: rgba(229, 229, 229, 0.9);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

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

.form-group label {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--colour-heading);
}

.form-group input,
.form-group textarea {
  background-color: var(--colour-surface);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.75rem;
  border-radius: var(--card-radius);
  color: var(--colour-heading);
  font-size: 0.95rem;
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--colour-primary);
}

.form-status {
  margin-top: 1rem;
  padding: 0.75rem;
  border-radius: var(--card-radius);
  font-size: 0.9rem;
  text-align: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.form-status.success {
  background-color: rgba(46, 160, 67, 0.2);
  border: 1px solid #2ea043;
  color: #2ea043;
  opacity: 1;
}

.form-status.error {
  background-color: rgba(242, 95, 76, 0.2);
  border: 1px solid var(--colour-primary);
  color: var(--colour-primary);
  opacity: 1;
}

/* Footer */
.footer {
  background-color: var(--colour-secondary);
  padding: 2rem 0 1rem;
  color: rgba(229, 229, 229, 0.8);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a ion-icon {
  font-size: 1.5rem;
  color: var(--colour-primary);
  transition: color 0.3s ease;
}

.social-links a:hover ion-icon {
  color: var(--colour-accent);
}

.citations {
  font-size: 0.7rem;
  margin-top: 1rem;
  text-align: center;
  color: rgba(229, 229, 229, 0.6);
}

.citations a {
  color: var(--colour-accent);
  text-decoration: underline;
}

/* Responsive design */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
}

@media (max-width: 768px) {
  .section-inner {
    flex-direction: column;
    align-items: center;
  }
  .text-column,
  .image-column {
    flex: 1 1 100%;
    max-width: 100%;
  }
  .technology .card,
  .integrations .card.small-card {
    flex: 1 1 100%;
    max-width: 100%;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .hero-subtitle {
    font-size: 1.1rem;
  }
  .nav-inner {
    justify-content: space-between;
  }
}