/* ============================================================
   DELTA JANITORIAL SYSTEMS — DESIGN SYSTEM
   Source of truth for all colors, typography, spacing, and
   component styles across the website.
   ============================================================ */

/* ------------------------------------------------------------
   1. COLOR PALETTE
   ------------------------------------------------------------ */
:root {
  /* Primary — from logo SVG */
  --color-navy:        #08004B;   /* logo lettering, headings, primary text */
  --color-green:       #10843B;   /* logo accent, CTAs, success states */

  /* Navy tints (lighter variants for backgrounds, borders) */
  --color-navy-light:  #1a1266;   /* hover states, secondary headings */
  --color-navy-faded:  #e8e7f0;   /* light background tint */
  --color-navy-subtle: #f4f3f8;   /* very light background */

  /* Green tints */
  --color-green-light: #14a34a;   /* hover state for green buttons */
  --color-green-dark:  #0c6a2f;   /* pressed state */
  --color-green-faded: #e6f4eb;   /* light green background */

  /* CTA accent — warm orange, used only on primary action buttons */
  --color-cta-orange:       #E5723A;
  --color-cta-orange-hover: #D0612E;
  --color-cta-orange-dark:  #B8522A;

  /* Neutrals */
  --color-white:       #FFFFFF;
  --color-gray-50:     #F9FAFB;   /* page background alt */
  --color-gray-100:    #F3F4F6;   /* section background alt */
  --color-gray-200:    #E5E7EB;   /* borders, dividers */
  --color-gray-300:    #D1D5DB;   /* disabled states */
  --color-gray-500:    #6B7280;   /* secondary text, captions */
  --color-gray-700:    #374151;   /* body text */
  --color-gray-900:    #111827;   /* high-contrast text (use sparingly) */

  /* Semantic */
  --color-text:        var(--color-gray-700);
  --color-heading:     var(--color-navy);
  --color-link:        var(--color-navy);
  --color-link-hover:  var(--color-navy-light);
  --color-cta:         var(--color-cta-orange);
  --color-cta-hover:   var(--color-cta-orange-hover);
  --color-bg:          var(--color-white);
  --color-bg-alt:      var(--color-gray-50);
  --color-border:      var(--color-gray-200);

  /* ------------------------------------------------------------
     2. TYPOGRAPHY
     ------------------------------------------------------------ */
  /*
     Primary: Inter — clean, professional, highly readable
     Fallback: system fonts
     Headings use navy, body uses gray-700
  */
  --font-primary:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Scale — modular, mobile-first (rem based) */
  --text-xs:         0.75rem;     /* 12px — fine print */
  --text-sm:         0.875rem;    /* 14px — captions, labels */
  --text-base:       1.125rem;    /* 18px — body */
  --text-lg:         1.25rem;     /* 20px — lead text */
  --text-xl:         1.25rem;     /* 20px — small headings */
  --text-2xl:        1.5rem;      /* 24px — h4 */
  --text-3xl:        1.875rem;    /* 30px — h3 */
  --text-4xl:        2.25rem;     /* 36px — h2 */
  --text-5xl:        3rem;        /* 48px — h1 */
  --text-6xl:        3.75rem;     /* 60px — hero headline */

  --leading-tight:   1.25;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  --weight-normal:   400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  /* ------------------------------------------------------------
     3. SPACING
     ------------------------------------------------------------ */
  --space-1:   0.25rem;   /* 4px */
  --space-2:   0.5rem;    /* 8px */
  --space-3:   0.75rem;   /* 12px */
  --space-4:   1rem;      /* 16px */
  --space-6:   1.5rem;    /* 24px */
  --space-8:   2rem;      /* 32px */
  --space-10:  2.5rem;    /* 40px */
  --space-12:  3rem;      /* 48px */
  --space-16:  4rem;      /* 64px */
  --space-20:  5rem;      /* 80px */
  --space-24:  6rem;      /* 96px */

  /* ------------------------------------------------------------
     4. LAYOUT
     ------------------------------------------------------------ */
  --max-width:       1200px;
  --max-width-narrow: 800px;
  --max-width-wide:  1400px;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-full: 9999px;

  --shadow-sm:   0 1px 2px rgba(8, 0, 75, 0.05);
  --shadow-md:   0 4px 6px rgba(8, 0, 75, 0.07);
  --shadow-lg:   0 10px 25px rgba(8, 0, 75, 0.1);
}

/* ------------------------------------------------------------
   5. BASE STYLES
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%; /* 16px base */
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ------------------------------------------------------------
   6. TYPOGRAPHY STYLES
   ------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: var(--leading-tight);
  font-weight: var(--weight-bold);
}

h1 {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-6);
}

h2 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

h4 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

p {
  margin-bottom: var(--space-4);
  max-width: 65ch; /* readable line length */
}

.lead {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-500);
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-link-hover);
}

/* ------------------------------------------------------------
   7. BUTTONS
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

/* Primary CTA — green (quote requests, main actions) */
.btn-primary {
  background-color: var(--color-cta-orange);
  color: var(--color-white);
  border-color: var(--color-cta-orange);
}

.btn-primary:hover {
  background-color: var(--color-cta-orange-hover);
  border-color: var(--color-cta-orange-hover);
  color: var(--color-white);
}

/* Secondary — navy outline */
.btn-secondary {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-secondary:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

/* Ghost — subtle, for nav or tertiary actions */
.btn-ghost {
  background-color: transparent;
  color: var(--color-navy);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-navy-faded);
}

/* Large button variant */
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* ------------------------------------------------------------
   8. LAYOUT COMPONENTS
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

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

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-navy {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.section-navy h2,
.section-navy h3,
.section-navy h4 {
  color: var(--color-white);
}

.section-navy .lead {
  color: rgba(255, 255, 255, 0.8);
}

/* Grid — simple responsive grid */
.grid {
  display: grid;
  gap: var(--space-6);
}

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

/* ------------------------------------------------------------
   9. CARDS
   ------------------------------------------------------------ */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

/* ------------------------------------------------------------
   10. RESPONSIVE BREAKPOINTS
   ------------------------------------------------------------ */
/* Tablet and below */
@media (max-width: 768px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }

  .section {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Phone */
@media (max-width: 480px) {
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }

  .container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  .btn-lg {
    width: 100%;
  }
}