/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
  /* Colors */
  --color-primary: #1a365d;
  --color-primary-light: #2c5282;
  --color-secondary: #4a5568;
  --color-accent: #3182ce;
  --color-text: #1a202c;
  --color-text-light: #4a5568;
  --color-bg: #ffffff;
  --color-bg-alt: #f7fafc;
  --color-border: #e2e8f0;
  --color-error: #c53030;
  --color-success: #2f855a;

  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --line-height: 1.6;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-sm);
}

ul {
  list-style-position: inside;
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section:nth-child(even) {
  background-color: var(--color-bg-alt);
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  background-color: var(--color-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
  font-weight: bold;
  font-size: var(--font-size-lg);
}

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

.logo-img {
  height: 50px;
  width: auto;
}

.logo-text {
  display: none;
}

@media (max-width: 480px) {
  .logo-img {
    height: 40px;
  }
}

.main-nav {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  color: var(--color-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(26, 54, 93, 0.7), rgba(26, 54, 93, 0.85));
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2rem, 5vw, 3.5rem);
  max-width: 800px;
  margin: 0 auto;
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section-intro {
  padding: var(--spacing-xl) 0;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.intro-image img {
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.intro-text h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .intro-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .intro-image {
    order: 2;
  }

  .intro-text {
    order: 1;
  }
}

/* Feature lists */
.feature-list {
  list-style: none;
  max-width: 700px;
}

.feature-list li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* About section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
}

.mission p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
}

.owner-photo {
  max-width: 300px;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .owner-photo {
    margin: 0 auto;
  }
}

/* ==========================================================================
   Contact Form
   ========================================================================== */
.section-contact {
  padding-top: var(--spacing-xl);
}

.contact-intro {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin-bottom: var(--spacing-xl);
}

.contact-form {
  max-width: 500px;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--color-text);
}

.required {
  color: var(--color-error);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Honeypot field - hidden from humans */
.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

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

.btn-primary:active {
  transform: translateY(1px);
}

/* Form messages */
.form-message {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 4px;
  margin-bottom: var(--spacing-md);
}

.form-message.success {
  background-color: #c6f6d5;
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-message.error {
  background-color: #fed7d7;
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: var(--spacing-lg) 0;
  text-align: center;
  margin-top: auto;
}

.site-footer p {
  margin: 0;
  opacity: 0.9;
}

/* ==========================================================================
   404 Page
   ========================================================================== */
.error-page {
  min-height: calc(100vh - var(--header-height) - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.error-content h1 {
  font-size: clamp(4rem, 10vw, 8rem);
  margin-bottom: var(--spacing-sm);
  opacity: 0.2;
}

.error-content h2 {
  margin-bottom: var(--spacing-md);
}

.error-content p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}