/**
 * Design System - Design Tokens & Variables
 *
 * Professional medical/healthcare design system for Assure Clinic.
 * This file contains all design tokens including colors, typography,
 * spacing, borders, shadows, and transitions.
 *
 * Design Philosophy:
 * - Trust & Professionalism (medical blues)
 * - Warmth & Care (gold accents)
 * - Success & Growth (natural greens)
 * - Clean & Modern (minimal, spacious)
 *
 * @package Assure_Clinic
 * @version 1.0.0
 */

/* ============================================================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ========================================================================== */

:root {
  /* ===== PRIMARY BRAND COLORS ===== */
  --color-primary: #1a5f7a;           /* Professional medical blue */
  --color-primary-dark: #0d3b4f;     /* Darker blue for hover states */
  --color-primary-light: #2d7a9a;    /* Lighter blue for backgrounds */
  --color-primary-50: #e6f2f7;       /* Very light blue for subtle backgrounds */
  --color-primary-100: #b3dae8;      /* Light blue for borders/accents */

  /* ===== SECONDARY COLORS ===== */
  --color-secondary: #e8a832;         /* Trust gold / Premium accent */
  --color-secondary-dark: #c88d1a;   /* Darker gold for hover */
  --color-secondary-light: #f5c563;  /* Lighter gold */

  /* ===== ACCENT COLORS ===== */
  --color-accent: #4a9d5f;           /* Success green / Growth */
  --color-accent-dark: #2d7a40;      /* Darker green */
  --color-accent-light: #6bc084;     /* Lighter green */

  /* ===== NEUTRAL COLORS ===== */
  --color-white: #ffffff;
  --color-black: #1a1a1a;
  --color-gray-50: #f9fafb;          /* Lightest gray - backgrounds */
  --color-gray-100: #f3f4f6;         /* Very light gray */
  --color-gray-200: #e5e7eb;         /* Light gray - borders */
  --color-gray-300: #d1d5db;         /* Medium-light gray */
  --color-gray-400: #9ca3af;         /* Medium gray - disabled text */
  --color-gray-500: #6b7280;         /* Medium-dark gray - secondary text */
  --color-gray-600: #4b5563;         /* Dark gray - body text */
  --color-gray-700: #374151;         /* Darker gray - headings */
  --color-gray-800: #1f2937;         /* Very dark gray */
  --color-gray-900: #111827;         /* Almost black */

  /* ===== SEMANTIC COLORS ===== */
  --color-success: #10b981;          /* Success messages */
  --color-success-light: #d1fae5;    /* Success background */
  --color-warning: #f59e0b;          /* Warning messages */
  --color-warning-light: #fef3c7;    /* Warning background */
  --color-error: #ef4444;            /* Error messages */
  --color-error-light: #fee2e2;      /* Error background */
  --color-info: #3b82f6;             /* Info messages */
  --color-info-light: #dbeafe;       /* Info background */

  /* ===== TYPOGRAPHY ===== */
  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-headings: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;

  /* Font Sizes (fluid typography) */
  --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-size-4xl: 2.25rem;     /* 36px */
  --font-size-5xl: 3rem;        /* 48px */
  --font-size-6xl: 3.75rem;     /* 60px */
  --font-size-7xl: 4.5rem;      /* 72px */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 1.8;

  /* Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.1em;

  /* ===== SPACING SYSTEM (8px base unit) ===== */
  --space-0: 0;
  --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-7: 1.75rem;    /* 28px */
  --space-8: 2rem;       /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-14: 3.5rem;    /* 56px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */
  --space-24: 6rem;      /* 96px */
  --space-32: 8rem;      /* 128px */
  --space-40: 10rem;     /* 160px */
  --space-48: 12rem;     /* 192px */

  /* ===== BORDER RADIUS ===== */
  --radius-none: 0;
  --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-3xl: 2rem;      /* 32px */
  --radius-full: 9999px;   /* Full circle */

  /* ===== SHADOWS ===== */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

  /* Medical-specific shadows with blue tint */
  --shadow-primary: 0 10px 25px -5px rgba(26, 95, 122, 0.2);
  --shadow-secondary: 0 10px 25px -5px rgba(232, 168, 50, 0.2);

  /* ===== TRANSITIONS ===== */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  --transition-slower: 500ms ease-in-out;

  /* Transition properties */
  --transition-all: all var(--transition-base);
  --transition-colors: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
  --transition-opacity: opacity var(--transition-base);
  --transition-transform: transform var(--transition-base);

  /* ===== BREAKPOINTS ===== */
  /* These are used in media queries */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* ===== CONTAINER ===== */
  --container-max-width: 1280px;
  --container-padding: 1rem;
  --container-padding-lg: 2rem;

  /* ===== Z-INDEX SCALE ===== */
  --z-below: -1;
  --z-normal: 0;
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-fixed: 1200;
  --z-modal-backdrop: 1300;
  --z-modal: 1400;
  --z-popover: 1500;
  --z-tooltip: 1600;
}

/* ============================================================================
   BASE STYLES & RESETS
   ========================================================================== */

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

/* Remove default margins and paddings */
* {
  margin: 0;
  padding: 0;
}

/* HTML & Body */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-700);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--font-size-5xl);
  letter-spacing: var(--letter-spacing-tight);
}

h2 {
  font-size: var(--font-size-4xl);
  letter-spacing: var(--letter-spacing-tight);
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

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

h6 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

/* Paragraphs */
p {
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

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

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Lists */
ul, ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
}

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

/* Strong & Bold */
strong, b {
  font-weight: var(--font-weight-semibold);
}

/* Emphasis & Italic */
em, i {
  font-style: italic;
}

/* Small text */
small {
  font-size: var(--font-size-sm);
}

/* ============================================================================
   CONTAINER & LAYOUT UTILITIES
   ========================================================================== */

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

@media (min-width: 1024px) {
  .container {
    padding-left: var(--container-padding-lg);
    padding-right: var(--container-padding-lg);
  }
}

.container-full {
  width: 100%;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Section spacing */
.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section-sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section-lg {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
}

/* ============================================================================
   FLEXBOX UTILITIES
   ========================================================================== */

.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-row {
  flex-direction: row;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

/* Justify Content */
.justify-start {
  justify-content: flex-start;
}

.justify-center {
  justify-content: center;
}

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

.justify-evenly {
  justify-content: space-evenly;
}

/* Align Items */
.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.items-baseline {
  align-items: baseline;
}

.items-stretch {
  align-items: stretch;
}

/* Gap */
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-10 { gap: var(--space-10); }
.gap-12 { gap: var(--space-12); }

/* ============================================================================
   GRID UTILITIES
   ========================================================================== */

.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* ============================================================================
   SPACING UTILITIES
   ========================================================================== */

/* Margin */
.m-0 { margin: var(--space-0); }
.m-2 { margin: var(--space-2); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.ml-2 { margin-left: var(--space-2); }
.ml-4 { margin-left: var(--space-4); }
.ml-auto { margin-left: auto; }

.mr-2 { margin-right: var(--space-2); }
.mr-4 { margin-right: var(--space-4); }
.mr-auto { margin-right: auto; }

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* Padding */
.p-0 { padding: var(--space-0); }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-4 {
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.px-6 {
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}

.py-4 {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.py-6 {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.py-12 {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

/* ============================================================================
   TYPOGRAPHY UTILITIES
   ========================================================================== */

/* Font Sizes */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }

/* Font Weights */
.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

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

/* Text Colors */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-gray-500 { color: var(--color-gray-500); }
.text-gray-600 { color: var(--color-gray-600); }
.text-gray-700 { color: var(--color-gray-700); }
.text-gray-900 { color: var(--color-gray-900); }
.text-white { color: var(--color-white); }

/* ============================================================================
   BACKGROUND UTILITIES
   ========================================================================== */

.bg-primary { background-color: var(--color-primary); }
.bg-primary-light { background-color: var(--color-primary-light); }
.bg-primary-50 { background-color: var(--color-primary-50); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-accent { background-color: var(--color-accent); }
.bg-white { background-color: var(--color-white); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }
.bg-gray-900 { background-color: var(--color-gray-900); }

/* ============================================================================
   BORDER UTILITIES
   ========================================================================== */

.border { border: 1px solid var(--color-gray-200); }
.border-t { border-top: 1px solid var(--color-gray-200); }
.border-b { border-bottom: 1px solid var(--color-gray-200); }
.border-l { border-left: 1px solid var(--color-gray-200); }
.border-r { border-right: 1px solid var(--color-gray-200); }

.border-primary { border-color: var(--color-primary); }
.border-gray-200 { border-color: var(--color-gray-200); }
.border-gray-300 { border-color: var(--color-gray-300); }

/* Border Radius */
.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ============================================================================
   SHADOW UTILITIES
   ========================================================================== */

.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }
.shadow-primary { box-shadow: var(--shadow-primary); }

/* ============================================================================
   DISPLAY UTILITIES
   ========================================================================== */

.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* ============================================================================
   POSITION UTILITIES
   ========================================================================== */

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* ============================================================================
   OVERFLOW UTILITIES
   ========================================================================== */

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-hidden { overflow-x: hidden; }
.overflow-y-auto { overflow-y: auto; }

/* ============================================================================
   WIDTH & HEIGHT UTILITIES
   ========================================================================== */

.w-full { width: 100%; }
.w-auto { width: auto; }
.h-full { height: 100%; }
.h-auto { height: auto; }

/* ============================================================================
   RESPONSIVE UTILITIES
   ========================================================================== */

/* These will be expanded in responsive.css */

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:flex-row { flex-direction: row; }
  .md\:text-5xl { font-size: var(--font-size-5xl); }
  .md\:text-6xl { font-size: var(--font-size-6xl); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:text-6xl { font-size: var(--font-size-6xl); }
  .lg\:text-7xl { font-size: var(--font-size-7xl); }
}