:root {
  /* HBYF Poster Color Palette */
  --color-primary: #5a664e; /* Dark Olive Green */
  --color-primary-light: #7a8b6a;
  --color-accent: #d4af37; /* Flowing Gold */
  --color-accent-muted: #c2b591;
  --color-bg-base: #f9f8f4; /* Soft Cream */
  --color-text-main: #333333;
  --color-white: #ffffff;
  
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  
  --shadow-sm: 0 2px 4px rgba(90, 102, 78, 0.1);
  --shadow-md: 0 4px 12px rgba(90, 102, 78, 0.15);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  line-height: 1.6;
  /* Replicating the flowing radial background from the poster */
  background-image: radial-gradient(circle at top right, rgba(212, 175, 55, 0.1), transparent 40%),
                    radial-gradient(circle at bottom left, rgba(122, 139, 106, 0.15), transparent 50%);
  background-attachment: fixed;
}

/* Bilingual Display Logic */
body[data-lang="en"] .lang-zh { display: none !important; }
body[data-lang="zh"] .lang-en { display: none !important; }

/* Navigation */
header {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 1rem 2rem;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-links a {
  color: var(--color-white);
  text-decoration: none;
  margin-right: 1.5rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-accent);
}

.lang-toggle {
  background-color: var(--color-accent-muted);
  border: none;
  color: var(--color-white);
  padding: 0.4rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

/* Layout & Typography */
.container {
  max-width: 1000px;
  margin: 3rem auto;
  padding: 0 2rem;
}

h1, h2, h3 {
  color: var(--color-primary);
  font-family: var(--font-serif);
  margin-bottom: 1rem;
}

.card {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
  border-top: 4px solid var(--color-accent);
}

/* Forms & Buttons */
.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

input[type="text"],
input[type="email"],
select,
textarea,
input[type="file"] {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-family: inherit;
}

/* Change this section in style.css */
.primary-btn {
  display: inline-block; /* Added for links */
  background-color: var(--color-primary);
  color: var(--color-white) !important; /* Force white text on links */
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.2s;
  text-decoration: none;
  text-align: center;
}

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

/* Add this new section for the gateway cards */
.selection-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.selection-card {
  border: 2px solid var(--color-primary-light);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
  background: white;
  text-decoration: none;
  color: var(--color-text-main);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.selection-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
  background: var(--color-bg-base);
}

.selection-card h3 {
  margin-bottom: 1rem;
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .selection-grid {
    grid-template-columns: 1fr;
  }
}