@import "tailwindcss";
@import "tw-animate-css";

@custom-variant dark (&:is(.dark *));

:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.145 0 0);
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.97 0 0);
  --secondary-foreground: oklch(0.205 0 0);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);
  --destructive: oklch(0.577 0.245 27.325);
  --destructive-foreground: oklch(0.577 0.245 27.325);
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
  --chart-1: oklch(0.646 0.222 41.116);
  --chart-2: oklch(0.6 0.118 184.704);
  --chart-3: oklch(0.398 0.07 227.392);
  --chart-4: oklch(0.828 0.189 84.429);
  --chart-5: oklch(0.769 0.188 70.08);
  --radius: 0.625rem;
  --sidebar: oklch(0.985 0 0);
  --sidebar-foreground: oklch(0.145 0 0);
  --sidebar-primary: oklch(0.205 0 0);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.97 0 0);
  --sidebar-accent-foreground: oklch(0.205 0 0);
  --sidebar-border: oklch(0.922 0 0);
  --sidebar-ring: oklch(0.708 0 0);
}

.dark {
  --background: oklch(0.145 0 0);
  --foreground: oklch(0.985 0 0);
  --card: oklch(0.145 0 0);
  --card-foreground: oklch(0.985 0 0);
  --popover: oklch(0.145 0 0);
  --popover-foreground: oklch(0.985 0 0);
  --primary: oklch(0.985 0 0);
  --primary-foreground: oklch(0.205 0 0);
  --secondary: oklch(0.269 0 0);
  --secondary-foreground: oklch(0.985 0 0);
  --muted: oklch(0.269 0 0);
  --muted-foreground: oklch(0.708 0 0);
  --accent: oklch(0.269 0 0);
  --accent-foreground: oklch(0.985 0 0);
  --destructive: oklch(0.396 0.141 25.723);
  --destructive-foreground: oklch(0.637 0.237 25.331);
  --border: oklch(0.269 0 0);
  --input: oklch(0.269 0 0);
  --ring: oklch(0.439 0 0);
  --chart-1: oklch(0.488 0.243 264.376);
  --chart-2: oklch(0.696 0.17 162.48);
  --chart-3: oklch(0.769 0.188 70.08);
  --chart-4: oklch(0.627 0.265 303.9);
  --chart-5: oklch(0.645 0.246 16.439);
  --sidebar: oklch(0.205 0 0);
  --sidebar-foreground: oklch(0.985 0 0);
  --sidebar-primary: oklch(0.488 0.243 264.376);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.269 0 0);
  --sidebar-accent-foreground: oklch(0.985 0 0);
  --sidebar-border: oklch(0.269 0 0);
  --sidebar-ring: oklch(0.439 0 0);
}

@theme inline {
  --font-serif: var(--font-playfair);
  --font-sans: var(--font-source-sans);

  /* Updated to sophisticated academic color scheme inspired by Frontiers */
  --color-eureka-primary: #1e40af; /* blue-800 - professional primary */
  --color-eureka-primary-light: #3b82f6; /* blue-500 - lighter variant */
  --color-eureka-accent: #dc2626; /* red-600 - strategic accent for CTAs */
  --color-eureka-accent-light: #ef4444; /* red-500 - lighter accent */
  --color-eureka-neutral-dark: #1f2937; /* gray-800 - dark text */
  --color-eureka-neutral-medium: #6b7280; /* gray-500 - medium text */
  --color-eureka-neutral-light: #f9fafb; /* gray-50 - light background */
  --color-eureka-white: #ffffff; /* pure white */

  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --color-card: var(--card);
  --color-card-foreground: var(--card-foreground);
  --color-popover: var(--popover);
  --color-popover-foreground: var(--popover-foreground);
  --color-primary: var(--primary);
  --color-primary-foreground: var(--primary-foreground);
  --color-secondary: var(--secondary);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-muted: var(--muted);
  --color-muted-foreground: var(--muted-foreground);
  --color-accent: var(--accent);
  --color-accent-foreground: var(--accent-foreground);
  --color-destructive: var(--destructive);
  --color-destructive-foreground: var(--destructive-foreground);
  --color-border: var(--border);
  --color-input: var(--input);
  --color-ring: var(--ring);
  --color-chart-1: var(--chart-1);
  --color-chart-2: var(--chart-2);
  --color-chart-3: var(--chart-3);
  --color-chart-4: var(--chart-4);
  --color-chart-5: var(--chart-5);
  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);
  --color-sidebar: var(--sidebar);
  --color-sidebar-foreground: var(--sidebar-foreground);
  --color-sidebar-primary: var(--sidebar-primary);
  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
  --color-sidebar-accent: var(--sidebar-accent);
  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
  --color-sidebar-border: var(--sidebar-border);
  --color-sidebar-ring: var(--sidebar-ring);
}

@layer base {
  * {
    @apply border-border outline-ring/50;
  }
  body {
    @apply bg-background text-foreground font-sans;
  }

  /* Enhanced heading typography for academic sophistication */
  h1,
  .heading-1 {
    @apply font-serif font-semibold text-4xl md:text-5xl lg:text-6xl leading-tight tracking-tight text-slate-900;
  }

  h2,
  .heading-2 {
    @apply font-serif font-medium text-3xl md:text-4xl lg:text-5xl leading-tight tracking-tight text-slate-900;
  }

  h3,
  .heading-3 {
    @apply font-serif font-medium text-2xl md:text-3xl lg:text-4xl leading-snug tracking-tight text-slate-900;
  }

  h4,
  .heading-4 {
    @apply font-sans font-semibold text-xl md:text-2xl leading-snug text-slate-900;
  }

  h5,
  .heading-5 {
    @apply font-sans font-semibold text-lg md:text-xl leading-snug text-slate-900;
  }

  h6,
  .heading-6 {
    @apply font-sans font-semibold text-base md:text-lg leading-normal text-slate-900;
  }

  /* Section headings with accent colors */
  .section-heading {
    @apply font-serif font-semibold text-3xl md:text-4xl leading-tight tracking-tight text-blue-800 mb-4;
  }

  .page-title {
    @apply font-serif font-semibold text-4xl md:text-5xl lg:text-6xl leading-tight tracking-tight text-blue-800 mb-6;
  }
}

/* Updated utility classes for academic color scheme with WCAG AA compliance */
.text-eureka-primary {
  color: #1e3a8a; /* Darker blue for better contrast */
}

.text-eureka-primary-light {
  color: #1d4ed8; /* Adjusted for better contrast */
}

.text-eureka-accent {
  color: #dc2626;
}

.text-eureka-accent-light {
  color: #b91c1c; /* Darker red for better contrast */
}

.text-eureka-neutral-dark {
  color: #111827; /* Darker for better contrast */
}

.text-eureka-neutral-medium {
  color: #4b5563; /* Darker gray for better readability */
}

.bg-eureka-primary {
  background-color: #1e40af;
}

.bg-eureka-primary-light {
  background-color: #3b82f6;
}

.bg-eureka-accent {
  background-color: #dc2626;
}

.bg-eureka-accent-light {
  background-color: #ef4444;
}

.bg-eureka-neutral-light {
  background-color: #f9fafb;
}

.bg-eureka-white {
  background-color: #ffffff;
}

.border-eureka-primary {
  border-color: #1e40af;
}

.border-eureka-accent {
  border-color: #dc2626;
}

/* Refined hover effects for academic aesthetic */
.hover-lift {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-lift:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30, 64, 175, 0.1);
}