/* ========================================
   Variables
   ======================================== */
:root {
  /* Colors */
  --color-background: #050b18; /* deep blue background */
  --color-surface: #0e1726;    /* elevated surface */
  --color-surface-alt: #121e30;
  --color-text: #f9fafb;       /* near white */
  --color-text-muted: #9ca3af; /* graphite gray */
  --color-border-subtle: #1f2933;
  --color-border-strong: #374151;

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

  --color-success: #22c55e;    /* soft green accents */
  --color-success-soft: rgba(34, 197, 94, 0.15);

  --color-warning: #facc15;
  --color-danger: #ef4444;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2933;
  --color-gray-900: #111827;

  /* Typography */
  --font-sans: 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-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: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px) */
  --space-0: 0;
  --space-4: 0.25rem;  /* 4px */
  --space-8: 0.5rem;   /* 8px */
  --space-12: 0.75rem; /* 12px */
  --space-16: 1rem;    /* 16px */
  --space-20: 1.25rem; /* 20px */
  --space-24: 1.5rem;  /* 24px */
  --space-32: 2rem;    /* 32px */
  --space-40: 2.5rem;  /* 40px */
  --space-48: 3rem;    /* 48px */
  --space-64: 4rem;    /* 64px */
  --space-80: 5rem;    /* 80px */
  --space-96: 6rem;    /* 96px */

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

  /* Shadows (subtle, not flashy, for trustworthy feel) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.35);

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

/* ========================================
   Reset / Normalize
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

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

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

body {
  min-height: 100vh;
}

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

img,
video {
  height: auto;
}

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

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

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

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

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

/* Prefer reduced motion */
@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;
  }
}

/* ========================================
   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;
}

main {
  min-height: 60vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-24);
}

h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-20);
}

h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-16);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-12);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-8);
}

h6 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

p {
  margin-bottom: var(--space-16);
  color: var(--color-text-muted);
}

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

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

a:hover {
  color: var(--color-success);
}

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

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

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

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-24) 0;
}

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

[tabindex="-1"]:focus {
  outline: none !important;
}

.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 helpers */
.container {
  width: 100%;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.section {
  padding-top: var(--space-40);
  padding-bottom: var(--space-40);
}

.section--tight {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
}

.flex {
  display: flex;
}

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

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

.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;
}

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

.gap-16 {
  gap: var(--space-16);
}

.gap-24 {
  gap: var(--space-24);
}

.gap-32 {
  gap: var(--space-32);
}

.grid {
  display: grid;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-24);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-24);
}

@media (max-width: 960px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

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

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

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

.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;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

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

.badge--neutral {
  background-color: var(--color-surface-alt);
  color: var(--color-text-muted);
}

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

/* Spacing utilities (margin-bottom) */
.mb-0 {
  margin-bottom: 0 !important;
}

.mb-8 {
  margin-bottom: var(--space-8) !important;
}

.mb-16 {
  margin-bottom: var(--space-16) !important;
}

.mb-24 {
  margin-bottom: var(--space-24) !important;
}

.mb-32 {
  margin-bottom: var(--space-32) !important;
}

.mt-24 {
  margin-top: var(--space-24) !important;
}

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

/* Buttons: primary actions (e.g., "Claim Offer") */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  padding: 0.6rem 1.4rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary-strong), var(--color-success));
  color: #ffffff!important;
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.btn--ghost:hover {
  border-color: var(--color-success);
  color: var(--color-success);
}

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

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

/* Inputs: filter/search controls */
.input,
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.75rem;
  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-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

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

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

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

/* Cards: comparison-style offer cards */
.card {
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 45%),
              radial-gradient(circle at bottom right, rgba(34, 197, 94, 0.13), transparent 50%),
              var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-20);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.card--flat {
  background: var(--color-surface);
  box-shadow: none;
}

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.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 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  margin-top: var(--space-8);
}

@media (max-width: 640px) {
  .card__header,
  .card__footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Comparison grid wrapper for offers list */
.offer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-24);
}

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

@media (max-width: 720px) {
  .offer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Subtle pill for "Verified", "Responsible" labels */
.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  background-color: var(--color-surface-alt);
  color: var(--color-text-muted);
}

.pill--verified {
  background-color: var(--color-success-soft);
  color: var(--color-success);
}

/* Table-like comparison row (for odds/breakdowns) */
.compare-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  font-size: var(--font-size-sm);
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-md);
  background-color: rgba(15, 23, 42, 0.7);
}

.compare-row + .compare-row {
  margin-top: 0.2rem;
}

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

.compare-row__value {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 640px) {
  .compare-row {
    grid-template-columns: 1.75fr 1fr;
    grid-template-rows: auto auto;
  }

  .compare-row__label {
    grid-column: 1 / -1;
  }

  .compare-row__value:last-child {
    text-align: left;
  }
}

/* Status text for responsible reminders / disclaimers */
.notice {
  border-radius: var(--radius-md);
  padding: var(--space-12) var(--space-16);
  font-size: var(--font-size-xs);
  line-height: var(--line-height-relaxed);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(15, 23, 42, 0.9);
  color: var(--color-text-muted);
}

.notice--success {
  border-color: var(--color-success);
  background-color: var(--color-success-soft);
  color: var(--color-success);
}

.notice--warning {
  border-color: var(--color-warning);
}

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

/* Header / Nav skeleton (minimal, for structure) */
.site-header {
  border-bottom: 1px solid var(--color-border-subtle);
  background: linear-gradient(to right, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.98));
  backdrop-filter: blur(16px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-brand__accent {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-success), var(--color-primary-strong));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-16);
}

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

.site-nav a:hover {
  color: var(--color-text);
}

@media (max-width: 768px) {
  .site-header__inner {
    align-items: center;
    justify-content: space-between;
    gap: var(--space-12);
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

/* Footer skeleton */
.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

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

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

/* ========================================
   End base.css
   ======================================== */