/* ========================================================================
   Variables
   ======================================================================== */
:root {
  /* Colors */
  --color-background: #f5f8fb;
  --color-surface: #ffffff;
  --color-text: #1f2933;
  --color-text-muted: #6b7280;

  --color-primary: #1769ff; /* clean, trustworthy blue */
  --color-primary-soft: #e5efff;
  --color-primary-strong: #0b4ac4;

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

  --color-border-subtle: #e2e8f0;
  --color-border-strong: #cbd5f5;

  --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: #1f2933;
  --color-neutral-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: 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 */

  --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: 0.125rem; /* 2px */
  --space-2: 0.25rem;  /* 4px */
  --space-3: 0.375rem; /* 6px */
  --space-4: 0.5rem;   /* 8px */
  --space-5: 0.625rem; /* 10px */
  --space-6: 0.75rem;  /* 12px */
  --space-8: 1rem;     /* 16px */
  --space-10: 1.25rem; /* 20px */
  --space-12: 1.5rem;  /* 24px */
  --space-16: 2rem;    /* 32px */
  --space-20: 2.5rem;  /* 40px */
  --space-24: 3rem;    /* 48px */
  --space-32: 4rem;    /* 64px */
  --space-40: 5rem;    /* 80px */
  --space-48: 6rem;    /* 96px */

  /* Radius */
  --radius-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Shadows - clean & subtle */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.1), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 6px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 10px 20px rgba(15, 23, 42, 0.08);

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

  /* Layout */
  --container-max-width: 1200px;
}

/* ========================================================================
   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,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

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

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

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

img {
  height: auto;
}

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

/* Remove default list bullets */
ul[role="list"],
ol[role="list"] {
  list-style: none;
}

/* Ensure body fills viewport height */
html,
body {
  min-height: 100%;
}

/* ========================================================================
   Base Styles
   ======================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background-color: var(--color-background);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-neutral-900);
}

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-12);
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-10);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-8);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-6);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

h6 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

p {
  margin-bottom: var(--space-8);
  }

strong,
b {
  font-weight: 600;
}

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

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

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

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

code,
pre {
  font-family: var(--font-mono);
  font-size: 0.95em;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-16) 0;
}

/* ========================================================================
   Accessibility & Motion
   ======================================================================== */
:focus-visible {
  outline: 2px solid var(--color-primary-strong);
  outline-offset: 3px;
}

@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;
  }
}

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

/* Layout: Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

@media (max-width: 768px) {
  .container {
    padding-left: var(--space-10);
    padding-right: var(--space-10);
  }
}

/* Flex helpers */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-row {
  flex-direction: row;
}

.flex-column {
  flex-direction: column;
}

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

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

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

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

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

.justify-end {
  justify-content: flex-end;
}

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

.gap-8 {
  gap: var(--space-8);
}

.gap-12 {
  gap: var(--space-12);
}

/* Grid helpers */
.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-12);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-12);
}

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Spacing utilities (common subset) */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-8 { margin-top: var(--space-8); }
.mb-8 { margin-bottom: var(--space-8); }
.mt-16 { margin-top: var(--space-16); }
.mb-16 { margin-bottom: var(--space-16); }
.pt-16 { padding-top: var(--space-16); }
.pb-16 { padding-bottom: var(--space-16); }

/* Visually hidden (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;
}

/* Alignment & text */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }

/* Width helpers */
.w-full { width: 100%; }

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

/* Buttons - primary, secondary, subtle */
.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: 500;
  font-size: var(--font-size-sm);
  line-height: 1.1;
  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);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.button:hover,
button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  background-color: var(--color-primary-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: #ffffff;
}

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

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

.button[disabled],
button[disabled],
input[type="button"][disabled],
input[type="submit"][disabled],
input[type="reset"][disabled],
.button.disabled,
button.disabled {
  cursor: not-allowed;
  opacity: 0.6;
  box-shadow: none;
  transform: none;
}

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

.button--secondary:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary-strong);
  color: var(--color-primary-strong);
}

.button--subtle {
  background-color: transparent;
  color: var(--color-primary-strong);
  border-color: transparent;
  box-shadow: none;
  padding-left: 0;
  padding-right: 0;
}

.button--subtle:hover {
  background-color: transparent;
  text-decoration: underline;
  color: var(--color-primary-strong);
}

/* Inputs & form controls */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  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: 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,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-soft), 0 0 0 3px rgba(23, 105, 255, 0.2);
}

input[disabled],
select[disabled],
textarea[disabled] {
  background-color: var(--color-neutral-100);
  cursor: not-allowed;
}

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

label {
  display: block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-neutral-800);
}

/* Card - for clean product/category presentation */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
  padding: var(--space-12);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base),
              border-color var(--transition-base);
}

.card--clickable {
  cursor: pointer;
}

.card--clickable:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
}

.card__header {
  margin-bottom: var(--space-8);
}

.card__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-4);
}

.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__footer {
  margin-top: var(--space-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* Badges (e.g., B2B labels, voorraadstatus) */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.badge--success {
  background-color: rgba(34, 197, 94, 0.08);
  color: #15803d;
}

.badge--warning {
  background-color: rgba(250, 204, 21, 0.16);
  color: #92400e;
}

.badge--danger {
  background-color: rgba(239, 68, 68, 0.08);
  color: #b91c1c;
}

/* Product image wrapper for clean aspect ratio */
.product-image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at top, #f5f8ff 0, #e5e9f2 40%, #f5f8fb 100%);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Subtle panel / info box (trust, shipping info, etc.) */
.info-panel {
  background-color: #f0f5ff;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  padding: var(--space-10);
  color: var(--color-neutral-800);
  font-size: var(--font-size-sm);
}

.info-panel--muted {
  background-color: var(--color-neutral-50);
  border-color: var(--color-neutral-200);
}

/* Alerts for important B2B notices */
.alert {
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-10);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-8);
}

.alert--success {
  background-color: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: #166534;
}

.alert--warning {
  background-color: rgba(250, 204, 21, 0.1);
  border: 1px solid rgba(250, 204, 21, 0.4);
  color: #854d0e;
}

.alert--danger {
  background-color: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #b91c1c;
}

/* Simple nav link styling for clean header */
.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-neutral-700);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background-color var(--transition-base),
              color var(--transition-base);
}

.nav-link:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

.nav-link--active {
  background-color: var(--color-primary);
  color: #ffffff;
}

/* Footer small text */
.footer-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}