/* 
   ZOI Design System - Tokens & Theme (State of the Art)
   Standards: REM units, A11y, Semantic Tokens, Motion
   Generated: 2026-01-31
*/

@import url('https://api.fontshare.com/v2/css?f[]=clash-display@200,300,400,500,600,700&display=swap');

:root {
  /* --------------------------------------------------------------------------
     1. Primitive Tokens (Raw Values)
     -------------------------------------------------------------------------- */
  
  /* Colors - Brand */
  --green-400: #b5ff81;
  --green-500: #90cc67;
  --green-900: #364c26;
  --magenta-500: #cc3366;
  
  /* Colors - Neutrals */
  --neutral-0:   #ffffff;
  --neutral-50:  #f7fff2;
  --neutral-100: #e7e7e7;
  --neutral-200: #cccccc;
  --neutral-300: #b0b0b0;
  --neutral-500: #808080;
  --neutral-600: #5c5c5c;
  --neutral-700: #3f444b;
  --neutral-800: #333333;
  --neutral-850: #33373d;
  --neutral-900: #141414;
  
  /* Colors - System Feedback */
  --system-error: #e53935;
  --system-success: #43a047;
  --system-warning: #fb8c00;

  /* Spacing Scale (REM bases - 1rem = 16px) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-20: 5rem;    /* 80px */
  --space-25: 6.25rem; /* 100px */

  /* Layout */
  --container-max: 80rem; /* 1280px */
  --container-padding: var(--space-5);
  
  /* Radius */
  --radius-sm: 0.25rem; /* 4px */
  --radius-md: 0.75rem; /* 12px */
  --radius-lg: 1rem;    /* 16px */
  --radius-full: 9999px;

  /* Typography Families */
  --font-display: 'Clash Display', -apple-system, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Motion (Animation) */
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.0, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;

  /* Z-Index Layers */
  --z-base: 0;
  --z-sticky: 100;
  --z-overlay: 1000;
  --z-modal: 1100;

  /* --------------------------------------------------------------------------
     2. Semantic Tokens (Design Decisions)
     -------------------------------------------------------------------------- */

  /* Backgrounds */
  --bg-page: var(--neutral-0);
  --bg-surface: var(--neutral-50);
  --bg-dark: var(--neutral-900);
  --bg-input: var(--neutral-0);
  
  /* Text */
  --text-primary: var(--neutral-800);
  --text-secondary: var(--neutral-600);
  --text-tertiary: var(--neutral-500);
  --text-inverse: var(--neutral-0);
  --text-brand: var(--neutral-900);

  /* Actions */
  --action-primary-bg: var(--green-400);
  --action-primary-fg: var(--text-brand);
  --action-primary-hover: var(--green-500);
  
  --action-secondary-bg: var(--neutral-900);
  --action-secondary-fg: var(--neutral-0);
  --action-secondary-hover: var(--neutral-800);

  /* Borders & Focus */
  --border-default: var(--neutral-200);
  --border-active: var(--neutral-800);
  --focus-ring: 0 0 0 3px rgba(181, 255, 129, 0.5); /* Brand Glow */
}

/* --------------------------------------------------------------------------
   3. Global Reset & Base
   -------------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 1rem; /* 16px base */
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.1;
  margin-top: 0;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

p { margin-top: 0; margin-bottom: var(--space-4); }

/* A11y: Focus Visible (Only shows when navigating via keyboard) */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   4. Component Classes
   -------------------------------------------------------------------------- */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Typography Utilities (Responsive using Clamp or REM) */
.text-display-xl { font-size: 3.5rem;  /* 56px */ letter-spacing: -0.02em; }
.text-display-lg { font-size: 3rem;    /* 48px */ letter-spacing: -0.01em; }
.text-display-md { font-size: 2rem;    /* 32px */ }
.text-body-lg { font-size: 1.25rem;    /* 20px */ }
.text-body-md { font-size: 1rem;       /* 16px */ }
.text-body-sm { font-size: 0.875rem;   /* 14px */ }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  user-select: none;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; pointer-events: none; }

.btn-primary {
  background-color: var(--action-primary-bg);
  color: var(--action-primary-fg);
}
.btn-primary:hover { background-color: var(--action-primary-hover); }

.btn-secondary {
  background-color: var(--action-secondary-bg);
  color: var(--action-secondary-fg);
}
.btn-secondary:hover { background-color: var(--action-secondary-hover); }

.btn-outline {
  background-color: transparent;
  border-color: var(--border-default);
  color: var(--text-primary);
}
.btn-outline:hover {
  border-color: var(--text-primary);
  background-color: var(--neutral-50);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
}

/* Forms (New!) */
.form-group { margin-bottom: var(--space-5); }

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--text-secondary);
}

.form-input {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-input);
  background-clip: padding-box;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.form-input:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: var(--focus-ring);
}

.form-input::placeholder { color: var(--neutral-300); }

/* Cards */
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  border: 1px solid var(--border-default);
  transition: transform var(--duration-normal) var(--ease-out);
}
.card:hover { transform: translateY(-2px); }

.card-dark {
  background: var(--bg-dark);
  color: var(--text-inverse);
  border: 1px solid var(--neutral-700);
}

/* Utilities */
.bg-dark { background-color: var(--bg-dark); color: var(--text-inverse); }
.text-center { text-align: center; }
.mb-8 { margin-bottom: var(--space-8); }
.py-20 { padding-top: var(--space-20); padding-bottom: var(--space-20); }

/* Layout Grid */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}