:root {
  /* =============================
     Variables
     ============================= */

  /* Colors */
  --color-background: #f5fbff; /* light airy background */
  --color-surface: #ffffff;
  --color-text: #12212f; /* subtle navy */
  --color-text-muted: #5f6b7a;

  --color-primary: #27a4ff; /* sky blue */
  --color-primary-soft: #e3f4ff;
  --color-primary-dark: #1573c7;

  --color-accent-mint: #6fe7c9;

  --color-success: #22c55e;
  --color-warning: #fbbf24;
  --color-danger: #ef4444;

  --color-border-subtle: #d6e2ee;
  --color-border-strong: #94a3b8;
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5f5;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", 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 */
  --font-size-5xl: 3rem;     /* 48px */

  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.6;

  /* Spacing scale (0–96px) */
  --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-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radii */
  --radius-sm: 0.25rem; /* 4px */
  --radius-md: 0.5rem;  /* 8px */
  --radius-lg: 1rem;    /* 16px */
  --radius-pill: 999px;

  /* Shadows (light, crisp, clean) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 4px 10px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 240ms ease-out;
}

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

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

* {
  margin: 0;
}

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

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

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

ul,
ol {
  padding-left: var(--space-6);
}

blockquote,
figure {
  margin: 0;
}

/* Remove default link underlines; we re-style them in Base */
a {
  text-decoration: none;
  color: inherit;
}

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

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

main {
  min-height: 60vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 650;
  letter-spacing: 0.01em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(var(--font-size-3xl), 3vw + 1rem, var(--font-size-5xl));
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(var(--font-size-2xl), 2.4vw + 0.5rem, var(--font-size-4xl));
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-3);
}

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

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

strong {
  font-weight: 600;
}

/* Links: clean, professional, with subtle hover */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

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

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-8) 0;
}

/* =============================
   Accessibility & Motion
   ============================= */

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

:focus {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

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

/* Centered content with comfortable reading width */
.container {
  width: 100%;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* Flex helpers */
.flex {
  display: flex;
}

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

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

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

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

.gap-xs {
  gap: var(--space-2);
}

.gap-sm {
  gap: var(--space-3);
}

.gap-md {
  gap: var(--space-4);
}

.gap-lg {
  gap: var(--space-6);
}

/* Grid helpers */
.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Spacing utilities (for quick layout tweaks) */
.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-2); }
.mt-sm { margin-top: var(--space-3); }
.mt-md { margin-top: var(--space-4); }
.mt-lg { margin-top: var(--space-6); }
.mt-xl { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-2); }
.mb-sm { margin-bottom: var(--space-3); }
.mb-md { margin-bottom: var(--space-4); }
.mb-lg { margin-bottom: var(--space-6); }
.mb-xl { margin-bottom: var(--space-8); }

.pt-0 { padding-top: 0; }
.pt-sm { padding-top: var(--space-4); }
.pt-md { padding-top: var(--space-6); }
.pt-lg { padding-top: var(--space-8); }

.pb-0 { padding-bottom: 0; }
.pb-sm { padding-bottom: var(--space-4); }
.pb-md { padding-bottom: var(--space-6); }
.pb-lg { padding-bottom: var(--space-8); }

/* 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;
}

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

/* Buttons: primary + subtle variants with clean, modern look */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-color: var(--color-primary-dark);
  color: #ffffff!important;
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border-subtle);
  color: var(--color-text);
  background-image: linear-gradient(135deg, rgba(39, 164, 255, 0.05), rgba(111, 231, 201, 0.05));
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

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

.btn-ghost: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-accent-mint);
  outline-offset: 3px;
}

/* Inputs: clean fields for forms and booking */
.input,
textarea,
select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(39, 164, 255, 0.2);
}

.input[aria-invalid="true"],
textarea[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: var(--color-danger);
}

label {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* Cards: airy surfaces for services, testimonials, credentials */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: var(--shadow-xs);
  padding: var(--space-6);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base),
    border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(39, 164, 255, 0.2);
}

.card-header {
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

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

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

/* Tag / pill (e.g., credentials, service type) */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.badge-mint {
  background-color: rgba(111, 231, 201, 0.12);
  color: #047857;
}

/* Subtle section background helper (for alternating blocks) */
.section-light {
  background: linear-gradient(180deg, #f5fbff 0%, #ffffff 100%);
}

.section-contrast {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 80%);
  color: #e5f4ff;
}

.section-contrast a {
  color: #e0f2fe;
}

.section-contrast a:hover {
  color: #ffffff;
}