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

:root {
  /* Color Palette - Tech-inspired, cool grays with accent */
  --color-background: #05060a; /* deep, sleek backdrop */
  --color-surface: #0d1016; /* elevated surfaces / cards */
  --color-surface-alt: #141823;
  --color-text: #f5f7fb;
  --color-text-muted: #a6afc3;

  --color-primary: #4c8dff; /* vibrant tech blue */
  --color-primary-soft: rgba(76, 141, 255, 0.12);
  --color-primary-strong: #2e6fe0;

  --color-success: #2ecc71;
  --color-warning: #f1c40f;
  --color-danger: #e74c3c;

  --color-border-subtle: #1d2332;
  --color-border-strong: #30384a;

  --color-gray-50: #f9fafb;
  --color-gray-100: #edf0f5;
  --color-gray-200: #d4d9e4;
  --color-gray-300: #b5becf;
  --color-gray-400: #949eb3;
  --color-gray-500: #757f93;
  --color-gray-600: #5b6578;
  --color-gray-700: #424b5c;
  --color-gray-800: #2b3241;
  --color-gray-900: #191e27;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 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: 1.1;
  --line-height-snug: 1.25;
  --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-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, premium, layered */
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-soft-sm: 0 4px 14px rgba(0, 0, 0, 0.35);
  --shadow-elevated: 0 18px 45px rgba(0, 0, 0, 0.55);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 200ms ease-out;
  --transition-slow: 320ms ease-out;
}

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

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

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
button,
input,
textarea,
select,
label,
fieldset,
legend,
ul,
ol,
li,
form,
article,
aside,
figure,
figcaption,
footer,
header,
nav,
section,
main,
video {
  margin: 0;
  padding: 0;
  border: 0;
}

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

body {
  min-height: 100vh;
}

ul,
ol {
  list-style: none;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
}

button,
[role="button"],
input[type="button"],
input[type="submit"] {
  cursor: pointer;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

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

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

main {
  display: block;
}

/* Headings: minimal, strong hierarchy */

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

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

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

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

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,
b {
  font-weight: 600;
}

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

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

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

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

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

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

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

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

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

@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;
  }
}

/* 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 - centered content with breathing room */

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1200px) {
  .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-col {
  display: flex;
  flex-direction: column;
}

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

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

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

/* 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);
}

.grid-auto-fit {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}

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

/* Simple spacing utilities for common use */

.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-4 { padding-top: var(--space-4) !important; }
.pt-6 { padding-top: var(--space-6) !important; }
.pb-4 { padding-bottom: var(--space-4) !important; }
.pb-6 { padding-bottom: var(--space-6) !important; }

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

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

/* Buttons - minimalist, high-contrast CTAs */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.6rem 1.3rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
  background: var(--color-primary);
  color: #ffffff;
  transition:
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-fast);
  box-shadow: var(--shadow-soft-sm);
}

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

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

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

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
  box-shadow: none;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-primary);
}

.btn--secondary {
  background: var(--color-surface-alt);
  color: var(--color-text);
  border-color: var(--color-border-subtle);
  box-shadow: none;
}

.btn--secondary:hover {
  background: var(--color-gray-800);
}

.btn--sm {
  padding: 0.4rem 0.9rem;
  font-size: var(--font-size-xs);
}

.btn--lg {
  padding: 0.8rem 1.6rem;
  font-size: var(--font-size-md);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  pointer-events: none;
}

/* Form Controls - clean, consistent inputs */

.input,
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

.input::placeholder,
textarea::placeholder {
  color: var(--color-gray-500);
}

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

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

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

/* Cards - product tiles / content blocks */

.card {
  position: relative;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft-sm);
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal),
    background-color var(--transition-normal);
}

.card--interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
  border-color: var(--color-primary-soft);
}

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

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.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);
}

/* Product-specific card helpers */

.card-product-media {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-4);
  background: radial-gradient(circle at 10% 0%, #1b2335 0%, #05060a 55%);
}

.card-product-media img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.card-badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  background: rgba(8, 189, 128, 0.16);
  color: #4af3b6;
  font-size: var(--font-size-xs);
  font-weight: 500;
  backdrop-filter: blur(10px);
}

/* Price text utility */

.price {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.price--muted {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: line-through;
}

/* Chips / Tags */

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: rgba(255, 255, 255, 0.02);
}

.chip--accent {
  border-color: var(--color-primary-soft);
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

/* Badges for status */

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

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

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

/* Minimal section shell for hero / category blocks */

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

.section--alt {
  background: radial-gradient(circle at top, #141823 0, #05060a 60%);
}

/* End of base.css */