/* ======================================
   Variables for Dark/Light Mode
====================================== */
:root {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --primary-color: #0077cc;
  --secondary-color: #00aaff;
  --card-bg: #1f1f1f;
  --card-shadow: rgba(0,0,0,0.5);
  --footer-bg: #1a1a1a;
  --footer-text: #cccccc;
}

/* ======================================
   Base / Global Styles
====================================== */
body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

/* ======================================
   Container / Centering
====================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ======================================
   Header / Navigation
====================================== */
header {
  width: 100%;
  background-color: var(--footer-bg);
  box-shadow: 0 2px 6px rgba(0,0,0,0.5);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
}

nav a {
  margin-left: 25px;
  font-weight: 500;
  transition: color 0.3s ease;
  color: #cccccc;
}

nav a:hover,
nav a.active {
  color: var(--secondary-color);
}

/* ======================================
   Hero Section
====================================== */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  height: 400px;
  background: url('../images/hero-bg.svg') no-repeat center center;
  background-size: cover;
  position: relative;
  color: #ffffff;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
}

.hero-section::after {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.3); /* Dims the animation slightly */
  z-index: -1;
}

.hero h1 {
  font-size: 2.8rem;
  z-index: 1;
  margin-bottom: 15px;
}

.hero p {
  font-size: 1.2rem;
  z-index: 1;
  color: #cccccc;
}

/* ======================================
   Sections (Specialties, Calculator, Process, Contact)
====================================== */
.specialties-section,
.calculator-section,
.process-section,
.contact-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 40px;
  padding: 60px 20px;
}

/* ======================================
   Cards (Specialties & Process Steps)
====================================== */
.specialty-card,
.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--card-bg);
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 20px var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.specialty-card:hover,
.process-step:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.8);
}

.specialty-card img,
.process-step img {
  width: 100px;
  height: 100px;
  margin-bottom: 15px;
}

/* ======================================
   Calculator Form
====================================== */
.calculator-form {
  display: flex;
  flex-direction: column;
  gap: 25px;
  width: 100%;
  max-width: 700px;
}

.calculator-form .form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.calculator-form .form-group {
  flex: 1 1 45%;
  display: flex;
  flex-direction: column;
  text-align: left;
}

.calculator-form label {
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text-color);
}

.calculator-form input,
.calculator-form select,
.calculator-form textarea {
  padding: 12px 15px;
  border-radius: 8px;
  border: 1px solid #333;
  font-size: 1rem;
  background-color: #2a2a2a;
  color: #ffffff;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.calculator-form input:focus,
.calculator-form select:focus,
.calculator-form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 6px rgba(0,170,255,0.4);
}

.primary-btn {
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 15px 30px;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.2s ease;
}

.primary-btn:hover {
  background-color: var(--secondary-color);
  transform: translateY(-3px);
}

.results {
  margin-top: 25px;
  padding: 20px;
  background: #1f1f1f;
  border-radius: 12px;
  width: 100%;
  max-width: 700px;
  color: var(--text-color);
}

.result-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.result-grid div {
  background: #2a2a2a;
  padding: 15px 20px;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.5);
  min-width: 150px;
}

/* ======================================
   Footer
====================================== */
footer {
  text-align: center;
  padding: 25px 0;
  font-size: 0.9rem;
  color: var(--footer-text);
  background-color: var(--footer-bg);
  margin-top: 40px;
}

/* ======================================
   Responsive
====================================== */
@media (max-width: 768px) {
  .calculator-form .form-row {
    flex-direction: column;
  }

  nav a {
    margin-left: 15px;
    font-size: 0.95rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }
}