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

:root {
  /* Colors */
  --color-background: #f5f8fb;
  --color-surface: #ffffff;
  --color-text: #182435;
  --color-text-muted: #5f6b7a;

  --color-primary: #1a7bbf;
  --color-primary-soft: #e3f2fb;
  --color-primary-strong: #0b5488;

  --color-success: #2f9e44;
  --color-warning: #f59f00;
  --color-danger: #e03131;

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

  --color-border-subtle: var(--gray-200);
  --color-border-strong: var(--gray-300);
  --color-focus: #1fb6ff;

  /* Accent greens for health / freshness */
  --color-accent-green: #2fbf71;
  --color-accent-green-soft: #e3f9ed;

  /* 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-serif: "Georgia", "Times New Roman", 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 */

  --line-height-tight: 1.2;
  --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-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-full: 9999px;

  /* Shadows (soft, clean, modern) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08),
    0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.12);

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

  /* Layout */
  --container-max-width: 1120px;
}

@media (min-width: 1024px) {
  :root {
    --font-size-4xl: 2.5rem; /* 40px on larger screens */
  }
}

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

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

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

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

ul[role='list'],
ol[role='list'] {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

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

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

/* Remove animations / smooth scrolling for users that prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-background);
  color: var(--color-text);
}

main {
  display: block;
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-top: 0;
  margin-bottom: var(--space-3);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

strong {
  font-weight: 600;
}

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

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

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

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

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

: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 for consistent max-width */

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

@media (min-width: 768px) {
  .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;
}

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

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

/* 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);
  }
}

/* Simple spacing utilities (for quick layout tweaks) */

.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; }

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

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

.bg-surface {
  background-color: var(--color-surface);
}

.rounded-md {
  border-radius: var(--radius-md);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}

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

/* Buttons – primary CTAs for purchase & actions */

.button,
button.button,
input[type='submit'].button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-green));
  color: #ffffff;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast),
    opacity var(--transition-fast);
}

.button:hover,
button.button:hover,
input[type='submit'].button:hover {
  background: linear-gradient(135deg, var(--color-primary-strong), var(--color-accent-green));
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.button:active,
button.button:active,
input[type='submit'].button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.button:focus-visible,
button.button:focus-visible,
input[type='submit'].button:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.button--ghost {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-primary-strong);
  border-color: rgba(26, 123, 191, 0.25);
  box-shadow: none;
}

.button--secondary {
  background: var(--color-surface);
  color: var(--color-primary-strong);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-xs);
}

.button[disabled],
button.button[disabled],
input[type='submit'].button[disabled],
.button:disabled,
button:disabled,
input[type='submit']:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  box-shadow: none;
}

/* Inputs / Form fields */

input[type='text'],
input[type='email'],
input[type='password'],
input[type='tel'],
input[type='search'],
input[type='number'],
select,
textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: #ffffff;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition: border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-fast);
}

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

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(26, 123, 191, 0.15), var(--shadow-xs);
}

input:disabled,
select:disabled,
textarea:disabled {
  background-color: var(--gray-50);
  color: var(--gray-500);
  cursor: not-allowed;
}

/* Cards – for product highlights, benefits, tech explanations */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(148, 163, 184, 0.15);
}

.card--soft {
  background: linear-gradient(145deg, #ffffff, #f4fbff);
}

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

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

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

/* Badges / Labels for technology, health claims, etc. */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid rgba(148, 163, 184, 0.4);
  color: var(--gray-600);
  background-color: #f8fafc;
}

.badge--primary {
  border-color: rgba(26, 123, 191, 0.2);
  color: var(--color-primary-strong);
  background-color: var(--color-primary-soft);
}

.badge--green {
  border-color: rgba(47, 191, 113, 0.2);
  color: var(--color-accent-green);
  background-color: var(--color-accent-green-soft);
}

/* Simple pill for review scores or trust labels */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  background-color: rgba(15, 23, 42, 0.04);
  font-size: var(--font-size-xs);
  color: var(--gray-700);
}

/* Notice / info strip (e.g., free delivery, secure payment) */

.notice {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, #e0f7ff, #eafaf3);
  color: var(--gray-800);
  font-size: var(--font-size-sm);
}

.notice__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  background: rgba(26, 123, 191, 0.12);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-strong);
}

/* ========================================================================== 
   Media / Imagery helpers
   ========================================================================== */

.img-rounded {
  border-radius: var(--radius-lg);
}

.img-soft-shadow {
  box-shadow: var(--shadow-md);
}

.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========================================================================== 
   End
   ========================================================================== */