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

:root {
  /* Colors */
  --color-bg: #0f172a; /* deep slate background for technical, modern feel */
  --color-surface: #111827;
  --color-surface-alt: #020617;
  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;

  --color-primary: #0ea5e9; /* clean, precise blue */
  --color-primary-soft: rgba(14, 165, 233, 0.12);
  --color-primary-hover: #0284c7;

  --color-success: #22c55e;
  --color-warning: #facc15;
  --color-danger: #ef4444;

  --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", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --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: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px) */
  --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 */

  /* Radius */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-full: 999px;

  /* Shadows (subtle, technical) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.25);
  --shadow-sm: 0 4px 10px rgba(15, 23, 42, 0.35);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.5);

  /* Borders */
  --border-color-soft: rgba(148, 163, 184, 0.25);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 220ms ease-out;
  --transition-slow: 320ms ease-out;
}

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

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

html {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

h1, h2, h3, h4, h5, h6,
figure, blockquote,
ol, ul, p {
  margin: 0;
  padding: 0;
}

ol, ul {
  list-style: none;
}

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

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

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

a {
  color: inherit;
  text-decoration: none;
}

/* Reduce motion for users that prefer it */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

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

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

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

p + p {
  margin-top: var(--space-2);
}

small {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: #f9fafb;
}

h1 {
  font-size: clamp(var(--font-size-3xl), 3vw, var(--font-size-5xl));
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(var(--font-size-2xl), 2.4vw, var(--font-size-4xl));
  margin-bottom: var(--space-3);
}

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

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

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

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

strong, b {
  font-weight: 600;
}

code, pre {
  font-family: var(--font-mono);
}

/* Links: clean, professional */

a {
  position: relative;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15em;
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

a:hover::after,
 a:focus-visible::after {
  width: 100%;
}

/* ========================================================================== *
   Accessibility & Focus
   ========================================================================== */

:focus:not(:focus-visible) {
  outline: none;
}

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

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
  white-space: nowrap;
}

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

/* Layout containers */

.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

.section {
  padding-block: var(--space-12);
}

.section--large {
  padding-block: var(--space-16);
}

.section--bordered {
  border-top: 1px solid var(--border-color-soft);
}

/* 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-col {
  display: flex;
  flex-direction: column;
}

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

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

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

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

/* Grid helpers */

.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
}

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

/* Spacing utilities (commonly needed) */

.mt-0 { margin-top: 0 !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-6 { margin-top: var(--space-6) !important; }
.mt-8 { margin-top: var(--space-8) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }
.mb-8 { margin-bottom: var(--space-8) !important; }

.pt-8 { padding-top: var(--space-8) !important; }
.pb-8 { padding-bottom: var(--space-8) !important; }

.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.35);
  color: var(--color-text-muted);
}

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

/* Button: primary CTA for booking / quote requests */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding-inline: var(--space-5);
  padding-block: 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
}

.btn--primary {
  background: linear-gradient(135deg, #0ea5e9, #22d3ee);
  color: #0b1120;
  box-shadow: 0 10px 25px rgba(8, 47, 73, 0.7);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #0284c7, #06b6d4);
  transform: translateY(-1px);
  box-shadow: 0 16px 35px rgba(8, 47, 73, 0.85);
}

.btn--ghost {
  background: rgba(15, 23, 42, 0.75);
  border-color: rgba(148, 163, 184, 0.5);
  color: var(--color-text);
}

.btn--ghost:hover {
  background: rgba(15, 23, 42, 0.95);
}

.btn--small {
  padding-inline: var(--space-4);
  padding-block: 0.55rem;
  font-size: var(--font-size-xs);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn:focus-visible {
  outline: 2px solid #22d3ee;
  outline-offset: 3px;
}

/* Inputs: quote forms, booking forms */

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

.field__label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.field__hint {
  margin-top: 0.25rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.field__error {
  margin-top: 0.25rem;
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  padding-inline: var(--space-3);
  padding-block: 0.55rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.45);
  background-color: rgba(15, 23, 42, 0.95);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
  outline: none;
}

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

input[disabled],
select[disabled],
textarea[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Card: for service steps, benefits, references */

.card {
  position: relative;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.08), transparent 55%),
              radial-gradient(circle at bottom right, rgba(15, 23, 42, 0.9), #020617);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), transparent 40%, transparent 60%, rgba(15, 23, 42, 0.6));
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
}

.card__header {
  margin-bottom: var(--space-3);
}

.card__title {
  font-size: var(--font-size-lg);
  margin-bottom: 0.25rem;
}

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

.card__body {
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.card__meta {
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Hero band / strip for speed, precision, expertise messaging */

.hero-band {
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  background: radial-gradient(circle at left, rgba(56, 189, 248, 0.3), transparent 55%),
              linear-gradient(135deg, #020617, #020617 45%, #020617 100%);
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: var(--shadow-md);
}

.hero-band__eyebrow {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #7dd3fc;
  margin-bottom: var(--space-2);
}

.hero-band__title {
  font-size: clamp(var(--font-size-3xl), 3.2vw, var(--font-size-4xl));
  margin-bottom: var(--space-3);
}

.hero-band__subtitle {
  max-width: 40rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Step list for service process explanation */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.step__index {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  border: 1px solid rgba(56, 189, 248, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
}

.step__content-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

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

/* Tagline / key values (precision, speed, professionalism) */

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill {
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.4);
  font-size: var(--font-size-xs);
  color: var(--gray-200);
  background: rgba(15, 23, 42, 0.8);
}

.pill--highlight {
  border-color: rgba(56, 189, 248, 0.7);
  color: #e0f2fe;
  background: rgba(8, 47, 73, 0.65);
}

/* Footer basics */

.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  padding-block: var(--space-6);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 640px) {
  .site-footer__meta {
    flex-direction: column;
    align-items: flex-start;
  }
}