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

:root {
  /* Color Palette */
  --color-background: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #1f2933;
  --color-text-muted: #6b7280;

  /* Brand / Accents (plumbing + trust) */
  --color-primary: #0f7ac4; /* main brand blue */
  --color-primary-soft: #e2f2ff;
  --color-primary-dark: #0b5a91;

  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-danger: #dc2626;

  /* Neutral Grays */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, 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-size-4xl: 2.25rem;  /* 36px */

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;

  /* Spacing Scale (px) */
  --space-0: 0;
  --space-4: 0.25rem;   /* 4px */
  --space-8: 0.5rem;    /* 8px */
  --space-12: 0.75rem;  /* 12px */
  --space-16: 1rem;     /* 16px */
  --space-20: 1.25rem;  /* 20px */
  --space-24: 1.5rem;   /* 24px */
  --space-32: 2rem;     /* 32px */
  --space-40: 2.5rem;   /* 40px */
  --space-48: 3rem;     /* 48px */
  --space-64: 4rem;     /* 64px */
  --space-80: 5rem;     /* 80px */
  --space-96: 6rem;     /* 96px */

  /* Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 10px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.12);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 200ms ease-out;
  --transition-slow: 300ms ease-out;
}

/* ========================================================================
   Reset / Normalize
   ======================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}
ul.list-check {
    list-style: none;
}
html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  border: none;
  background: none;
  padding: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
figure {
  margin: 0;
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background-color: var(--color-background);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--gray-900);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-12);
}

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-base);
}

p {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

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

strong {
  font-weight: 600;
}

code {
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.95em;
}

/* ========================================================================
   Accessibility
   ======================================================================== */

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Screen-reader only utility */
.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;
}

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

/* Layout container for main content sections */
.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-16);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-24);
  }
}

.section {
  padding-block: var(--space-48);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-64);
  }
}

/* Simple flex helpers for quick layouts (e.g., service lists, feature rows) */
.flex {
  display: flex;
}

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

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

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

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

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

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

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

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

.gap-16 {
  gap: var(--space-16);
}

.gap-24 {
  gap: var(--space-24);
}

.gap-32 {
  gap: var(--space-32);
}

/* Grid helper for responsive service cards, pricing tables, etc. */
.grid {
  display: grid;
  gap: var(--space-16);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

.text-muted {
  color: var(--color-text-muted);
}

.mt-24 {
  margin-top: var(--space-24);
}

.mb-24 {
  margin-bottom: var(--space-24);
}

.mb-32 {
  margin-bottom: var(--space-32);
}

/* ========================================================================
   Components
   ======================================================================== */

/* Buttons: primary call-to-action for booking, contact, etc. */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: var(--font-size-sm);
  line-height: 1;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary-soft);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* Form elements: used across contact, booking, quote forms */

.form-group {
  margin-bottom: var(--space-16);
}

label {
  display: block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-800);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="search"],
input[type="url"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-300);
  background-color: #ffffff;
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-normal),
    box-shadow var(--transition-fast),
    background-color var(--transition-normal);
}

input::placeholder,
textarea::placeholder {
  color: var(--gray-400);
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input[disabled],
textarea[disabled],
select[disabled] {
  background-color: var(--gray-100);
  cursor: not-allowed;
}

/* Card: for service summaries, pricing blocks, testimonials, etc. */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
}

.card-header {
  margin-bottom: var(--space-16);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-8);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card-body {
  font-size: var(--font-size-sm);
}

/* Tag / badge for service types, response times, etc. */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 500;
  background-color: var(--gray-100);
  color: var(--gray-700);
}

.badge-success {
  background-color: #e6f9ef;
  color: var(--color-success);
}

.badge-warning {
  background-color: #fff6e6;
  color: var(--color-warning);
}

.badge-danger {
  background-color: #feeaea;
  color: var(--color-danger);
}

/* Simple section headers: used for major page sections (Services, Coverage, etc.) */

.section-heading {
  margin-bottom: var(--space-24);
}

.section-heading h2 {
  margin-bottom: var(--space-8);
}

.section-heading p {
  color: var(--color-text-muted);
}

/* Informational alert boxes (e.g., emergency contact note, service notices) */

.alert {
  border-radius: var(--radius-md);
  padding: var(--space-16);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-8);
}

.alert-info {
  background-color: var(--color-primary-soft);
  border: 1px solid rgba(15, 122, 196, 0.15);
  color: var(--gray-800);
}

.alert-success {
  background-color: #e6f9ef;
  border: 1px solid rgba(22, 163, 74, 0.15);
  color: var(--gray-800);
}

.alert-warning {
  background-color: #fff6e6;
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--gray-800);
}

.alert-danger {
  background-color: #feeaea;
  border: 1px solid rgba(220, 38, 38, 0.2);
  color: var(--gray-800);
}

/* Simple list styling for maintenance tips, service steps, etc. */

.list {
  list-style: none;
  padding-left: 0;
}

.list .list-check {
  list-style: none;
  padding-left: 0;
}

.list-check li {
  position: relative;
  padding-left: 1.5rem;
}

.list-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background-color: var(--color-primary);
}