/**
 * Radiology Conference - Main Styles
 * Professional medical/clinical aesthetic
 */

/* CSS Variables - Clinic Master Professional Theme (Gold) */
:root {
  --color-primary: #f7c637;
  --color-primary-dark: #d4a52e;
  --color-accent: #f9d66d;
  --color-accent-light: #fce9a8;
  --color-neutral-dark: #1e293b;
  --color-neutral: #64748b;
  --color-neutral-light: #f1f5f9;
  --color-bg: #f8fafc;
  --color-white: #ffffff;
  --color-success: #059669;
  --color-error: #dc2626;
  --color-button: #15334d;
  --color-button-hover: #1e4a6a;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-base: 16px;
  --line-height: 1.6;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  --header-height: 72px;
  --max-width: 1200px;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  line-height: var(--line-height);
  color: var(--color-neutral-dark);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md);
  font-weight: 700;
  color: var(--color-neutral-dark);
  line-height: 1.3;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin: 0 0 var(--spacing-md);
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-button);
  color: var(--color-white);
  font-weight: 600;
  z-index: 10000;
  transition: top 0.2s ease;
  border-radius: var(--radius-md);
}

.skip-link:focus {
  top: var(--spacing-md);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

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