/* ===================================
   CSS Reset
   =================================== */

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

/* ===================================
   CSS Variables
   =================================== */

:root {
  /* Colors - Cope Pilot Brand */
  --color-primary: #84C062;           /* Medium green */
  --color-primary-light: #C3E4A6;     /* Light green */
  --color-primary-lighter: #E9EFB7;   /* Very light yellow-green */
  --color-accent: #FFC67F;            /* Soft orange accent */
  --color-dark: #37371C;              /* Olive dark */
  --color-white: #FFFFFF;             /* White */

  /* Text Colors */
  --color-text-primary: #37371C;      /* Olive text */
  --color-text-secondary: rgba(55, 55, 28, 0.7);  /* Olive at 70% opacity */
  --color-text-light: #FFFFFF;        /* White text on dark backgrounds */

  /* Background & UI Colors */
  --color-bg-light: #F5F5F0;          /* Subtle background */
  --color-bg-white: #FFFFFF;          /* White background */
  --color-border: #E9EFB7;            /* Lightest green for borders */
  --color-gradient-green: #EDF7E8;    /* Dimmed green for body gradient - provides contrast with UI elements */

  /* Band colors (assessment severity levels) */
  --band-protective: #4caf50;
  --band-functional: #ffeb3b;
  --band-strained: #ff9800;
  --band-high-concern: #f44336;

  /* Pattern colors (assessment timeline, 9 levels) */
  --pattern-1: #4caf50;
  --pattern-2: #8bc34a;
  --pattern-3: #cddc39;
  --pattern-4: #ffeb3b;
  --pattern-5: #ffc107;
  --pattern-6: #ff9800;
  --pattern-7: #ff5722;
  --pattern-8: #e91e63;
  --pattern-9: #9c27b0;

  /* Typography - Poppins */
  --font-family-base: 'Poppins', sans-serif;
  --font-family-heading: 'Poppins', sans-serif;

  /* Figma type scale: Headline 24, Sub-header 20, Body 18, Caption/CTA 14 */
  --font-size-caption: 0.875rem;  /* 14px — Caption, CTA buttons */
  --font-size-xs: 0.875rem;       /* 14px */
  --font-size-sm: 1rem;           /* 16px */
  --font-size-base: 1.125rem;     /* 18px — Body */
  --font-size-lg: 1.25rem;        /* 20px — Sub-header */
  --font-size-xl: 1.5rem;         /* 24px — Headline */
  --font-size-2xl: 1.75rem;       /* 28px */
  --font-size-3xl: 2rem;          /* 32px */
  --font-size-4xl: 2.5rem;        /* 40px */

  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing Scale - 8px Grid */
  --spacing-xs: 0.5rem;    /* 8px */
  --spacing-sm: 1rem;      /* 16px */
  --spacing-md: 1.5rem;    /* 24px */
  --spacing-lg: 2rem;      /* 32px */
  --spacing-xl: 3rem;      /* 48px */
  --spacing-2xl: 4rem;     /* 64px */
  --spacing-3xl: 6rem;     /* 96px */

  /* Layout & Effects */
  --container-max-width: 1200px;
  --border-radius: 16px;
}

/* ===================================
   Base Styles
   =================================== */

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: linear-gradient(
    180deg,
    var(--color-white) 0%,
    var(--color-gradient-green) 15%,
    var(--color-white) 35%,
    var(--color-gradient-green) 55%,
    var(--color-white) 75%,
    var(--color-gradient-green) 90%,
    var(--color-white) 100%
  );
  min-height: 100vh;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-md);
}

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

a:hover {
  color: var(--color-text-secondary);
  text-decoration: underline;
}

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

/* ===================================
   Button Styles
   =================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  text-align: center;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: #6FA84E;  /* Darker green */
  transform: translateY(-2px);
}

.btn-primary:focus {
  outline: 3px solid rgba(132, 192, 98, 0.4);
  outline-offset: 2px;
}

.btn-primary:active {
  transform: translateY(0);
}

/* ===================================
   Layout Utilities
   =================================== */

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

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

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

/* Text Alignment */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* Spacing Utilities */
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.pt-xs { padding-top: var(--spacing-xs); }
.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }
.pt-xl { padding-top: var(--spacing-xl); }

.pb-xs { padding-bottom: var(--spacing-xs); }
.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }
.pb-xl { padding-bottom: var(--spacing-xl); }

/* ===================================
   Glass Effect Utility
   =================================== */

.glass-card {
  background: var(--color-primary-light);
  border: none;
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
}

/* ===================================
   Gradient Background Utilities
   =================================== */

.bg-gradient-1 {
  background: radial-gradient(at 20% 30%, #C3E4A6 0%, #FFFFFF 70%);
}

.bg-gradient-2 {
  background: radial-gradient(at 80% 70%, #C3E4A6 0%, #FFFFFF 70%);
}

.bg-gradient-3 {
  background: radial-gradient(at 40% 50%, #C3E4A6 0%, #FFFFFF 70%);
}

.bg-gradient-4 {
  background: radial-gradient(at 60% 40%, #C3E4A6 0%, #FFFFFF 70%);
}

/* ===================================
   Screen Reader Only
   =================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===================================
   Responsive Design
   =================================== */

/* Tablet and below (max-width: 768px) */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2rem;        /* 32px on tablet */
    --font-size-3xl: 1.75rem;     /* 28px on tablet */
    --font-size-2xl: 1.5rem;      /* 24px on tablet */
    --spacing-xl: 2rem;           /* Reduce spacing on mobile */
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* Mobile (max-width: 480px) */
@media (max-width: 480px) {
  :root {
    --font-size-4xl: 1.75rem;     /* 28px on small mobile */
    --font-size-3xl: 1.5rem;      /* 24px on small mobile */
  }
}