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

:root {
  /* Colors - Metallic & Professional Palette */
  --color-background: #070b10; /* deep near-black */
  --color-surface: #0e141b;    /* elevated surface */
  --color-surface-alt: #151d27; 

  --color-text: #f4f7fb;
  --color-text-muted: #a3adc2;
  --color-border-subtle: #202938;

  --color-primary: #2e8fff;         /* bright tech-blue */
  --color-primary-soft: rgba(46, 143, 255, 0.12);
  --color-primary-strong: #1b6ed1;

  --color-success: #32d67f;
  --color-warning: #ffb648;
  --color-danger: #ff4f5e;

  /* Neutral grays (cool metallic) */
  --gray-50: #0b1017;
  --gray-100: #151b24;
  --gray-200: #222a36;
  --gray-300: #313b4c;
  --gray-400: #4a5670;
  --gray-500: #66738f;
  --gray-600: #8893aa;
  --gray-700: #aeb7c8;
  --gray-800: #d4d9e4;
  --gray-900: #f4f7fb;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 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-md: 1.0625rem; /* 17px */
  --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-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* 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-7: 1.75rem;  /* 28px */
  --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, metallic, not fluffy */
  --shadow-sm: 0 6px 16px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 18px 45px rgba(0, 0, 0, 0.6);
  --shadow-soft-border: 0 0 0 1px rgba(255, 255, 255, 0.02), 0 18px 45px rgba(0, 0, 0, 0.7);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 260ms ease;

  /* Layout */
  --container-max-width: 1120px;
  --container-padding-x: var(--space-4);

  /* Focus outline */
  --focus-ring-color: rgba(46, 143, 255, 0.75);
  --focus-ring-offset: 2px;
  --focus-ring-width: 2px;
}

/* Dark-mode friendly body background fallback */
@media (prefers-color-scheme: light) {
  :root {
    --color-background: #f6f8fb;
    --color-surface: #ffffff;
    --color-surface-alt: #f0f3f9;
    --color-text: #111827;
    --color-text-muted: #6b7280;
    --color-border-subtle: #dde3f0;
  }
}

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

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

html,
body {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
}

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

img {
  height: auto;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background: radial-gradient(circle at top left, #102035 0, var(--color-background) 55%);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: 60vh;
}

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

h1 {
  font-size: clamp(2.25rem, 1.4rem + 2vw, 3rem);
  letter-spacing: 0.01em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.75rem, 1.1rem + 1.6vw, 2.25rem);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-3);
}

h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

h5 {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

h6 {
  font-size: 1rem;
  margin-bottom: var(--space-1);
}

p {
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

strong {
  font-weight: 600;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base), opacity var(--transition-fast);
}

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

a:active {
  opacity: 0.8;
}

a:focus-visible {
  outline: none;
}

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

pre {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  overflow-x: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-6) 0;
}

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

:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Only show focus outlines when using keyboard navigation (for supported UAs) */
:focus:not(:focus-visible) {
  outline: none;
}

/* 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 to center content and keep it readable */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding-x);
  padding-right: var(--container-padding-x);
}

/* Flex utilities */
.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;
}

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

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

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

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

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

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

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

/* Grid utilities */
.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);
  }
}

/* Simple spacing utilities (commonly used) */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

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

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

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

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

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

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.02);
  color: var(--color-text-muted);
}

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

/* Buttons - metallic, confident, clearly interactive */

.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  --btn-bg: var(--color-primary);
  --btn-bg-hover: var(--color-primary-strong);
  --btn-bg-active: #14539c;
  --btn-color: #ffffff;
  --btn-border: transparent;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--btn-border);
  background: radial-gradient(circle at top left, rgba(255,255,255,0.18) 0, transparent 45%), linear-gradient(135deg, #4ba2ff, var(--btn-bg));
  color: var(--btn-color);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition:
    background var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast),
    border-color var(--transition-base),
    color var(--transition-base),
    opacity var(--transition-fast);
  white-space: nowrap;
}

.button:hover,
button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  background: linear-gradient(135deg, var(--btn-bg-hover), #1e76e2);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.7);
  transform: translateY(-1px);
}

.button:active,
button:active,
input[type="button"]:active,
input[type="submit"]:active,
input[type="reset"]:active {
  background: var(--btn-bg-active);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.85);
  transform: translateY(0);
}

.button--ghost {
  --btn-bg: transparent;
  --btn-bg-hover: rgba(46, 143, 255, 0.08);
  --btn-bg-active: rgba(46, 143, 255, 0.16);
  --btn-color: var(--color-text);
  --btn-border: rgba(255, 255, 255, 0.12);

  background: rgba(255, 255, 255, 0.02);
  box-shadow: none;
}

.button--ghost:hover {
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.6);
}

.button--secondary {
  --btn-bg: var(--gray-200);
  --btn-bg-hover: var(--gray-300);
  --btn-bg-active: #151b24;
  --btn-color: var(--color-text);
}

.button[disabled],
button[disabled],
input[type="button"][disabled],
input[type="submit"][disabled],
input[type="reset"][disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.button:focus-visible,
button:focus-visible,
input[type="button"]:focus-visible,
input[type="submit"]:focus-visible,
input[type="reset"]:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: 2px;
}

/* Inputs & form controls */

.input,
textarea,
select,
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="password"],
input[type="number"],
input[type="search"],
input[type="date"],
input[type="time"] {
  width: 100%;
  padding: 0.625rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(3, 8, 18, 0.9);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.input:focus,
textarea:focus,
select:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="search"]:focus,
input[type="date"]:focus,
input[type="time"]:focus {
  outline: none;
  border-color: rgba(46, 143, 255, 0.8);
  box-shadow: 0 0 0 1px rgba(46, 143, 255, 0.5);
  background-color: #050812;
}

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

select {
  background-image: linear-gradient(45deg, transparent 50%, var(--color-text-muted) 50%),
                    linear-gradient(135deg, var(--color-text-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 14px) 55%,
    calc(100% - 9px) 55%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2rem;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

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

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

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

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

/* Card - for services, pricing, diagnostic highlights */

.card {
  position: relative;
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    linear-gradient(145deg, #050911, #0b111c);
  box-shadow: var(--shadow-soft-border);
  border: 1px solid rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at top left, rgba(46, 143, 255, 0.18), transparent 55%);
  opacity: 0.4;
}

.card > * {
  position: relative;
  z-index: 1;
}

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

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.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-muted);
}

.card-footer {
  margin-top: var(--space-4);
}

.card--outline {
  background: rgba(4, 9, 17, 0.9);
  box-shadow: none;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Tag-like pill for pricing and quick diagnostics labels */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.125rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(6, 12, 22, 0.95);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

/* Hero media wrapper for crisp, modern imagery */
.hero-media {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background: radial-gradient(circle at center, #1f2b3a 0, #050811 70%);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.8);
}

.hero-media img,
.hero-media picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(46, 143, 255, 0.65), transparent 50%);
  mix-blend-mode: soft-light;
  pointer-events: none;
  opacity: 0.65;
}

/* Status indicators for rapid diagnostics, maintenance, etc. */
.status-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background-color: var(--color-success);
  box-shadow: 0 0 0 6px rgba(50, 214, 127, 0.18);
}

.status-dot--warning {
  background-color: var(--color-warning);
  box-shadow: 0 0 0 6px rgba(255, 182, 72, 0.18);
}

.status-dot--danger {
  background-color: var(--color-danger);
  box-shadow: 0 0 0 6px rgba(255, 79, 94, 0.18);
}

/* Pill navigation for service categories */
.tabs {
  display: inline-flex;
  padding: 0.25rem;
  border-radius: var(--radius-full);
  background: rgba(8, 13, 23, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.tab {
  position: relative;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  border: none;
  background: transparent;
  transition:
    color var(--transition-base),
    background var(--transition-base);
}

.tab--active {
  color: var(--color-text);
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.06), transparent 75%),
              linear-gradient(135deg, rgba(46, 143, 255, 0.4), rgba(46, 143, 255, 0.12));
}

/* Subtle panel for pricing transparency / info strips */
.info-strip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(8, 13, 23, 0.85);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.info-strip strong {
  color: var(--color-text);
}

/* End of base.css */