/* 
 * Enterprise Design System
 * Kwadaso Agricultural College Admissions System
 * Standardized Tokens & Utility Classes
 */

:root {
  /* Brand Colors */
  --kac-green: #23673d;       /* Primary Brand Color */
  --kac-dark: #1d5431;        /* Dark variant for hover states / backgrounds */
  --kac-light: #a3d6b3;       /* Light variant for accents / active states */
  --kac-accent: #f0b90b;      /* A complementary accent color (gold/yellow) for CTAs */

  /* Semantic Colors */
  --color-success: #28a745;
  --color-danger: #dc3545;
  --color-warning: #ffc107;
  --color-info: #17a2b8;

  /* Neutrals & Text */
  --text-primary: #1e293b;    /* Dark slate for high contrast */
  --text-secondary: #475569;  /* Medium slate for secondary text */
  --text-tertiary: #94a3b8;   /* Light slate for placeholders */
  --text-on-dark: #ffffff;
  
  --bg-main: #f8fafc;         /* Very light blue-grey for main background */
  --bg-card: #ffffff;
  --border-color: #e2e8f0;

  /* Typography */
  --font-family-base: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-heading: 'Inter', system-ui, -apple-system, sans-serif;
  
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.25rem;  /* 20px */
  --spacing-6: 1.5rem;   /* 24px */
  --spacing-8: 2rem;     /* 32px */
  --spacing-10: 2.5rem;  /* 40px */
  --spacing-12: 3rem;    /* 48px */

  /* Shadows (Enterprise Smooth Shadows) */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-green: 0 10px 30px rgba(35, 103, 61, 0.2);

  /* Border Radius */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-2xl: 1.5rem;  /* 24px */
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
body {
  font-family: var(--font-family-base);
  color: var(--text-primary);
  background-color: var(--bg-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  color: var(--kac-green);
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
}

a {
  color: var(--kac-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Shared UI Components */

/* Enterprise Card */
.ds-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-8);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.ds-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* Primary Button */
.ds-btn-primary {
  background: linear-gradient(135deg, var(--kac-green) 0%, var(--kac-dark) 100%);
  color: var(--text-on-dark);
  border: none;
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.ds-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-green);
  color: var(--text-on-dark);
}

.ds-btn-primary:active {
  transform: translateY(1px);
}

.ds-btn-primary:disabled, .ds-btn-primary.is-loading {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Outline Button */
.ds-btn-outline {
  background: transparent;
  color: var(--kac-green);
  border: 2px solid var(--kac-green);
  padding: calc(var(--spacing-3) - 2px) var(--spacing-6);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  transition: all var(--transition-fast);
}

.ds-btn-outline:hover {
  background: var(--kac-green);
  color: var(--text-on-dark);
}

/* Form Inputs */
.ds-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-card);
  transition: all var(--transition-fast);
}

.ds-input::placeholder {
  color: var(--text-tertiary);
}

.ds-input:focus {
  outline: none;
  border-color: var(--kac-green);
  box-shadow: 0 0 0 3px rgba(35, 103, 61, 0.1);
}

.ds-input.has-error {
  border-color: var(--color-danger);
}

.ds-input.has-error:focus {
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

/* Form Labels */
.ds-label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.ds-label.required::after {
  content: " *";
  color: var(--color-danger);
}

/* Helper / Error Text */
.ds-help-text {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.ds-error-text {
  display: block;
  margin-top: var(--spacing-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  font-weight: var(--font-weight-medium);
}

/* Custom Spinner */
@keyframes ds-spin {
  to { transform: rotate(360deg); }
}

.ds-spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: ds-spin 0.8s linear infinite;
}

/* Toast Notification Override (for SweetAlert or Custom Toasts) */
.swal2-toast {
  padding: var(--spacing-3) var(--spacing-4) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-lg) !important;
}