/* CSS Variables */
:root {
  --color-primary: #3d4f7c;
  --color-primary-dark: #2d3a5c;
  --color-primary-light: #4d6090;
  --color-text: #ffffff;
  --color-text-muted: rgba(255, 255, 255, 0.8);
  --color-accent: #f7c948;
  --color-accent-green: #005A00;
  --color-white: #ffffff;
  --color-border: rgba(255, 255, 255, 0.2);

  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;

  --max-width: 900px;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;

  --border-radius: 4px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-primary);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

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

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

/* Header */
.site-header {
  padding: var(--spacing-sm) 0;
  position: relative;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-white);
  border: 2px solid var(--color-white);
  padding: 0.3rem 0.5rem;
  text-align: center;
}

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

#main-nav a {
  color: var(--color-text);
  font-weight: 400;
  padding: var(--spacing-xs) 0;
  transition: opacity 0.2s;
}

#main-nav a:hover {
  opacity: 0.8;
  text-decoration: none;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: transform 0.3s;
}

@media (max-width: 600px) {
  .menu-toggle {
    display: flex;
  }

  #main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-primary-dark);
    flex-direction: column;
    padding: var(--spacing-sm) var(--spacing-md);
    gap: 0;
  }

  #main-nav.active {
    display: flex;
  }

  #main-nav a {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
  }

  #main-nav a:last-child {
    border-bottom: none;
  }
}

/* Hero Section */
.hero {
  background-color: var(--color-primary-dark);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.hero-logo {
  display: inline-block;
  border: 3px solid var(--color-white);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.hero-logo-text {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-white);
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
}

.hero .tagline {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

/* Intro Section */
.intro {
  padding: var(--spacing-xl) 0;
}

.intro p {
  font-size: 1.1rem;
  line-height: 1.8;
  text-align: center;
}

/* Section Divider */
.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0;
}

/* Section Heading */
.section-heading {
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--color-accent);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

/* Apps Section */
.apps-section {
  padding: var(--spacing-xl) 0;
}

/* App Card */
.app-card {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.app-card:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.app-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.app-icon {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
  border-radius: 50%;
  object-fit: cover;
}

.app-content h3 {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.app-content p {
  color: var(--color-text);
  line-height: 1.6;
}

.app-content .more-info {
  margin-top: var(--spacing-sm);
}

.app-content .more-info a {
  text-decoration: underline;
}

.app-screenshot {
  margin: var(--spacing-md) auto;
  max-width: 400px;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.app-store-badges {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.app-store-badge {
  height: 50px;
  width: auto;
}

/* About Section */
.about-section {
  padding: var(--spacing-xl) 0;
}

.about-section p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
  text-align: center;
}

.about-section p:last-child {
  margin-bottom: 0;
}

/* Contact Section */
.contact-section {
  padding: var(--spacing-xl) 0;
}

.contact-intro {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

/* Contact Form */
.contact-form {
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.2s, background-color 0.2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.15);
}

.form-group textarea {
  min-height: 180px;
  resize: vertical;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  text-align: left;
}

.form-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-white);
}

.form-checkbox label {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  cursor: pointer;
}

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-text);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.btn:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Form Messages */
.form-success {
  background-color: rgba(76, 175, 80, 0.2);
  border: 1px solid rgba(76, 175, 80, 0.5);
  color: #a5d6a7;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.form-error {
  background-color: rgba(244, 67, 54, 0.2);
  border: 1px solid rgba(244, 67, 54, 0.5);
  color: #ef9a9a;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

/* Footer */
.site-footer {
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.social-links {
  margin-bottom: var(--spacing-md);
}

.social-icon {
  width: 32px;
  height: 32px;
  color: var(--color-text);
  transition: opacity 0.2s;
}

.social-icon:hover {
  opacity: 0.8;
}

.copyright {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Utility: Hidden */
.hidden {
  display: none !important;
}

/* 404 Page */
.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.error-page h1 {
  font-size: 4rem;
  margin-bottom: var(--spacing-sm);
}

.error-page p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-muted);
}