/* =============================================================
   BASE.CSS
   Shared by every page. Loaded automatically through @import
   from Home.css and cart.css (so no HTML change is needed).

   1. Theme variables  (change colors / sizes HERE)
   2. Page reset and default element styles
   3. Shared utility: .hidden
   4. Shared component: .toast
   ============================================================= */


/* -------------------------------------------------------------
   1. THEME VARIABLES
   ------------------------------------------------------------- */
:root {
  /* Brand / primary (buttons, links, important actions) */
  --color-primary: #0369a1;
  --color-primary-hover: #075985;
  --color-primary-soft: #e0f2fe;
  --color-primary-on-dark: #38bdf8;   /* primary shade used on the dark header */

  /* Header */
  --color-header-bg: #0f172a;
  --color-on-dark: #f8fafc;

  /* Neutrals: backgrounds and borders */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-alt: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;

  /* Neutrals: text */
  --color-text: #0f172a;
  --color-text-soft: #334155;
  --color-text-muted: #64748b;

  /* Status colors */
  --color-success: #047857;
  --color-success-soft-hover: #d1fae5;
  --color-success-soft: #ecfdf5;
  --color-success-border: #a7f3d0;

  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;

  --color-warning: #f59e0b;

  /* Focus ring and modal backdrop */
  --color-focus-ring: rgba(3, 105, 161, 0.25);
  --color-overlay: rgba(15, 23, 42, 0.5);

  /* Typography */
  --font-body: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.8125rem;
  --fs-base: 0.9375rem;
  --fs-md: 1.05rem;
  --fs-lg: 1.25rem;
  --fs-logo: 1.25rem;

  /* Spacing scale */
  --space-3xs: 2px;
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Shape */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.1), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-card-hover: 0 10px 24px rgba(15, 23, 42, 0.16);
  /* Modal: the 100vmax shadow draws the dark backdrop behind the box */
  --shadow-modal: 0 0 0 100vmax var(--color-overlay), 0 8px 25px rgba(15, 23, 42, 0.15);

  /* Layers */
  --z-header: 20;
  --z-modal: 1000;
  --z-toast: 2000;

  /* Motion */
  --transition: 0.2s ease;

  /* Header sizing (mobile first, larger values below) */
  --header-padding: 14px 4%;
  --cart-icon-size: 24px;
}

/* Tablet and larger */
@media (min-width: 640px) {
  :root {
    --fs-logo: 1.5rem;
    --header-padding: 16px 5%;
    --cart-icon-size: 28px;
  }
}


/* -------------------------------------------------------------
   2. RESET AND DEFAULT ELEMENT STYLES
   ------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

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

button {
  cursor: pointer;
  background: none;
  border: none;
}

ul {
  list-style: none;
}


/* -------------------------------------------------------------
   3. UTILITY: .hidden
   JavaScript adds / removes this class to show or hide elements.
   !important is used so it always wins over rules such as
   ".product-form { display: flex }".
   ------------------------------------------------------------- */
.hidden {
  display: none !important;
}


/* -------------------------------------------------------------
   4. TOAST (notification message)
   JavaScript adds / removes the .show class.
   ------------------------------------------------------------- */
.toast {
  position: fixed;
  right: var(--space-md);
  bottom: var(--space-md);
  z-index: var(--z-toast);

  max-width: calc(100% - (var(--space-md) * 2));
  padding: 14px 20px;
  background-color: var(--color-header-bg);
  color: var(--color-on-dark);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);

  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}