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

:root {
  /* Colors - cool, professional blues & greys */
  --color-background: #0f172a; /* deep navy for page bg */
  --color-surface: #0b1120; /* darker surface for sections */
  --color-surface-alt: #020617; /* header/footer, hero */
  --color-text: #e5e7eb; /* light gray text */
  --color-text-muted: #9ca3af;
  --color-border-subtle: #1f2937;

  --color-primary: #2563eb; /* main brand blue */
  --color-primary-soft: rgba(37, 99, 235, 0.12);
  --color-primary-dark: #1d4ed8;

  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-danger: #ef4444;

  --color-neutral-50: #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --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 */

  --line-height-tight: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* 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 */

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows - subtle, modern */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.25);
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.28);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.45);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;
}

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

img,
video {
  height: auto;
}

picture {
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}

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

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

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

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

/* Remove default link styles */
a {
  color: inherit;
  text-decoration: none;
}

/* ========================================================================== 
   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);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

/* Headings - scaled, with clear hierarchy */

h1,
.h1 {
  font-size: clamp(2rem, 3vw, 2.75rem);
  line-height: var(--line-height-tight);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2,
.h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.25rem);
  line-height: var(--line-height-snug);
  font-weight: 650;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

h3,
.h3 {
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  line-height: var(--line-height-snug);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

h4,
.h4 {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  /* comfortable line length */
}

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

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

strong,
b {
  font-weight: 600;
}

/* Links - primary accent, subtle hover */

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

a:hover,
a:focus-visible {
  color: var(--color-primary-light, #3b82f6);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

/* Lists */

ul,
ol {
  padding-left: 1.25rem;
  margin-bottom: var(--space-4);
}

li + li {
  margin-top: 0.25rem;
}

/* Code */

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

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

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

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

:focus:not(:focus-visible) {
  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;
  }
}

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

/* Layout helpers */

.container {
  width: 100%;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

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

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

.section--alt {
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.15), transparent 55%),
    var(--color-surface);
}

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

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

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

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

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

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

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

/* Grid utilities */

.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);
  }
}

/* Text alignment */

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

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

/* Width helpers */

.w-full {
  width: 100%;
}

.max-w-md {
  max-width: 32rem;
}

.max-w-lg {
  max-width: 40rem;
}

/* Screen reader only */

.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;
}

/* Spacing utilities (common) */

.mt-0 {
  margin-top: 0;
}

.mt-sm {
  margin-top: var(--space-3);
}

.mt-md {
  margin-top: var(--space-4);
}

.mt-lg {
  margin-top: var(--space-6);
}

.mb-0 {
  margin-bottom: 0;
}

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

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

.mb-lg {
  margin-bottom: var(--space-6);
}

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

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

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: #f9fafb;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1e40af, #1d4ed8);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--color-text);
}

.btn-outline:hover {
  background-color: rgba(15, 23, 42, 0.9);
  border-color: var(--color-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  background-color: rgba(15, 23, 42, 0.9);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

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

/* Inputs */

.input,
textarea,
select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  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-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.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);
}

.input--invalid {
  border-color: var(--color-danger);
}

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

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

/* Cards - for services, testimonials, etc. */

.card {
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 55%),
    var(--color-surface-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base),
    background var(--transition-base);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.7);
}

.card--subtle {
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
}

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

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.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);
}

/* Badges - for status, response time, etc. */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(148, 163, 184, 0.6);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.badge--primary {
  border-color: rgba(37, 99, 235, 0.9);
  background-color: rgba(37, 99, 235, 0.18);
  color: #dbeafe;
}

.badge--success {
  border-color: rgba(34, 197, 94, 0.8);
  background-color: rgba(34, 197, 94, 0.15);
  color: #bbf7d0;
}

/* Hero-specific helpers (optional but common) */

.hero {
  padding-top: var(--space-20);
  padding-bottom: var(--space-16);
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.35), transparent 55%),
    radial-gradient(circle at bottom right, rgba(15, 23, 42, 0.9), transparent 55%),
    var(--color-surface-alt);
}

.hero-title {
  font-size: clamp(2.25rem, 4vw, 3rem);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
}

/* Call-to-action strip */

.cta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(30, 64, 175, 0.95));
  border: 1px solid rgba(37, 99, 235, 0.7);
  box-shadow: var(--shadow-sm);
}

.cta-strip__text {
  font-size: var(--font-size-base);
}

/* Subtle divider */

.divider {
  width: 100%;
  border: 0;
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  margin: var(--space-8) 0;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  background-color: #020617;
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.site-footer a:hover {
  color: var(--color-primary);
}

/* Responsive tweaks */

@media (max-width: 640px) {
  .section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }

  .hero {
    padding-top: var(--space-16);
    padding-bottom: var(--space-12);
  }

  .cta-strip {
    padding: var(--space-4);
  }
}