/* main.css - Professional Black & White Theme */

:root {
  --primary-color: #ffffff;
  --secondary-color: #f8f8f8;
  --accent-color: #cccccc;
  --dark-bg: #000000;
  --darker-bg: #0a0a0a;
  --medium-bg: #1a1a1a;
  --light-gray: #333333;
  --medium-gray: #666666;
  --border-color: rgba(255, 255, 255, 0.1);
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 80px;
  --content-max-width: 1200px;
  --section-padding: 100px 0;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--dark-bg);
  color: var(--primary-color);
  line-height: 1.6;
  overflow-x: hidden;
  padding-top: var(--nav-height);
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: var(--dark-bg);
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 2000;
  transition: top 0.3s;
  font-weight: 600;
}

.skip-link:focus {
  top: 10px;
}

/* Background Elements */
.background-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 50%, var(--medium-bg) 100%);
  z-index: -2;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.3);
  z-index: -1;
}

/* NAVIGATION */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--nav-height);
}

.logo img {
  height: 45px;
  width: auto;
  filter: brightness(0) invert(1);
}

/* DESKTOP NAVIGATION */
.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  padding: 10px 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  letter-spacing: 0.5px;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
  outline: none;
}

.nav-links a[aria-current="page"] {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  font-weight: 600;
}

/* HAMBURGER MENU */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  background: var(--primary-color);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* MOBILE NAVIGATION - FULL HEIGHT WITH CLOSE BUTTON AT TOP */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 20px;
    height: 70px;
  }

  .logo img {
    height: 35px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100vh; /* Full screen height */
    background: var(--dark-bg);
    display: flex;
    flex-direction: column;
    justify-content: center; /* Center menu items vertically */
    align-items: center;
    gap: 20px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
    padding: 0; /* No extra padding */
    overflow: hidden; /* No scrollbars */
  }

  .nav-links.show {
    transform: translateX(0);
  }

  /* Close button positioning */
  .nav-links .close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 28px;
    cursor: pointer;
    color: var(--primary-color);
  }

  .nav-links a {
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.5px;
    padding: 10px 20px;
    color: var(--primary-color);
    border-bottom: none;
    text-align: center;
    width: auto;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: var(--transition);
  }

  .nav-links a:hover,
  .nav-links a:focus {
    color: var(--primary-color);
    border-bottom: none;
    background: rgba(255, 255, 255, 0.1);
  }

  .nav-links a[aria-current="page"] {
    color: var(--primary-color);
    font-weight: 500;
    background: rgba(255, 255, 255, 0.15);
  }
}


/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 100;
  letter-spacing: -2px;
}

h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 200;
  letter-spacing: -1px;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 300;
}

.lead {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  font-weight: 300;
  color: var(--accent-color);
  line-height: 1.7;
}

/* Layout */
.container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 40px;
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
}

.content-section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-subtitle {
  color: var(--medium-gray);
  font-size: 1.1rem;
  margin-top: 20px;
  font-weight: 400;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 20px;
  position: relative;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: 30px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  margin-bottom: 50px;
  color: var(--accent-color);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
  font-weight: 300;
}

.hero-buttons {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 16px 32px;
  text-decoration: none;
  border-radius: 2px;
  font-weight: 500;
  transition: var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: 15px;
  letter-spacing: 0.5px;
  min-width: 160px;
  text-align: center;
}

.btn.primary {
  background: var(--primary-color);
  color: var(--dark-bg);
  border-color: var(--primary-color);
}

.btn.primary:hover,
.btn.primary:focus {
  background: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  outline: none;
}

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

.btn.secondary:hover,
.btn.secondary:focus {
  background: var(--primary-color);
  color: var(--dark-bg);
  transform: translateY(-2px);
  outline: none;
}

/* Forms */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-grid,
.grid {
  display: grid;
  gap: 25px;
  grid-template-columns: 1fr;
}

.form-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.form-grid .full {
  grid-column: 1 / -1;
}

.contact-form label {
  display: block;
  margin-bottom: 25px;
}

.contact-form label span {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--primary-color);
  font-size: 14px;
  letter-spacing: 0.5px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  color: var(--primary-color);
  font-family: var(--font-family);
  font-size: 15px;
  transition: var(--transition);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: rgba(255, 255, 255, 0.08);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--medium-gray);
}

.form-success,
.success {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  padding: 20px;
  border-radius: 2px;
  margin-top: 25px;
  text-align: center;
  font-weight: 500;
}

.hidden {
  display: none !important;
}

/* Footer */
.footer {
  background: var(--darker-bg);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 30px;
  margin-top: 120px;
}

.footer-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: start;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 60px;
}

.footer-column h4 {
  color: var(--primary-color);
  margin-bottom: 25px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.footer-column a {
  display: block;
  color: var(--medium-gray);
  text-decoration: none;
  margin-bottom: 12px;
  transition: var(--transition);
  font-size: 14px;
}

.footer-column a:hover,
.footer-column a:focus {
  color: var(--primary-color);
  outline: none;
}

.footer-column a[aria-current="page"] {
  color: var(--primary-color);
  font-weight: 500;
}

.footer-logo img {
  height: 50px;
  width: auto;
  opacity: 0.7;
  filter: brightness(0) invert(1);
}

.footer-bottom {
  text-align: center;
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  color: var(--medium-gray);
  font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .content-section {
    padding: 80px 0;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 50px;
    text-align: center;
    padding: 0 20px;
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 0 15px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* Accessibility & Performance */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus styles */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}