/* ========================================================================== 
   Variables
   ========================================================================== */
:root {
  /* Colors */
  --color-bg: #050711; /* dark, subtle blue-black */
  --color-surface: #0b0f1d;
  --color-surface-alt: #111827;
  --color-text: #f9fafb;
  --color-text-muted: #9ca3af;

  --color-primary: #6366f1; /* indigo */
  --color-primary-soft: rgba(99, 102, 241, 0.15);
  --color-primary-strong: #4f46e5;

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

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

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --text-xs: 0.75rem;   /* 12px */
  --text-sm: 0.875rem;  /* 14px */
  --text-base: 1rem;    /* 16px */
  --text-lg: 1.125rem;  /* 18px */
  --text-xl: 1.25rem;   /* 20px */
  --text-2xl: 1.5rem;   /* 24px */
  --text-3xl: 1.875rem; /* 30px */
  --text-4xl: 2.25rem;  /* 36px */

  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-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;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 4px 10px rgba(15, 23, 42, 0.35);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.6);
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.65);

  /* 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 {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

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;
  color: inherit;
}

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

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

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

/* Remove list bullets by default; can be overridden in components */
ul,
ol {
  list-style: none;
}

/* ========================================================================== 
   Base
   ========================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: 60vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--gray-50);
}

h1 { font-size: clamp(2.25rem, 3vw, 2.75rem); margin-bottom: var(--space-4); }
h2 { font-size: clamp(1.875rem, 2.4vw, 2.25rem); margin-bottom: var(--space-3); }
h3 { font-size: clamp(1.5rem, 2vw, 1.875rem); margin-bottom: var(--space-2); }
h4 { font-size: 1.25rem; margin-bottom: var(--space-2); }
h5 { font-size: 1.125rem; margin-bottom: var(--space-2); }
h6 { font-size: 1rem; margin-bottom: var(--space-1); }

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

strong {
  font-weight: 600;
}

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

a {
  color: var(--color-primary);
  transition: color var(--transition-normal), opacity 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 rgba(148, 163, 184, 0.25);
  margin: var(--space-6) 0;
}

/* Placeholder visibility on dark background */
::placeholder {
  color: var(--gray-500);
  opacity: 1;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ========================================================================== 
   Utilities
   ========================================================================== */
/* Layout: container for main content width */
.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 1200px) {
  .container {
    max-width: 1240px;
  }
}

/* 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-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-2); }
.gap-md { gap: var(--space-4); }
.gap-lg { gap: var(--space-6); }

/* Grid helpers for content sections (news, reviews, etc.) */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

/* Spacing utilities (simple set used often for sections) */
.section {
  padding-block: var(--space-10);
}

.section-tight {
  padding-block: var(--space-6);
}

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

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

/* Tag / pill helper for categories & trending topics */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: rgba(15, 23, 42, 0.9);
  color: var(--gray-100);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.tag--primary {
  background: var(--color-primary-soft);
  color: var(--gray-50);
  border-color: rgba(129, 140, 248, 0.6);
}

/* 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;
}

/* ========================================================================== 
   Components
   ========================================================================== */
/* Buttons - primary CTA for news, newsletter, etc. */
.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  --btn-bg: var(--color-primary);
  --btn-bg-hover: var(--color-primary-strong);
  --btn-color: #ffffff;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 0;
  background: var(--btn-bg);
  color: var(--btn-color);
  font-weight: 600;
  font-size: var(--text-sm);
  line-height: 1.2;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    opacity var(--transition-fast);
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.45);
}

.button:hover,
button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  background: var(--btn-bg-hover);
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(79, 70, 229, 0.6);
}

.button:active,
button:active,
input[type="button"]:active,
input[type="submit"]:active,
input[type="reset"]:active {
  transform: translateY(0);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.9);
}

.button--ghost {
  --btn-bg: transparent;
  --btn-bg-hover: rgba(15, 23, 42, 0.9);
  --btn-color: var(--gray-100);

  border: 1px solid rgba(148, 163, 184, 0.7);
  box-shadow: none;
}

.button--ghost:hover {
  border-color: rgba(129, 140, 248, 0.9);
}

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

.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);
  outline-offset: 3px;
}

/* Inputs - used in search, newsletter, contact, FAQ forms */
input[type="text"],
input[type="email"],
input[type="search"],
input[type="password"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.4);
  background-color: rgba(15, 23, 42, 0.95);
  color: var(--color-text);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background-color var(--transition-normal);
}

input[type="search"] {
  padding-right: 2.4rem; /* space for search icon if used */
}

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

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(129, 140, 248, 0.8);
}

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

/* Card - used for news tiles, reviews, articles, FAQ blocks */
.card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: radial-gradient(circle at top left, rgba(129, 140, 248, 0.16), transparent 55%),
    radial-gradient(circle at bottom right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.98));
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal),
    background var(--transition-normal);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(129, 140, 248, 0.9);
}

.card__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: var(--text-xs);
  color: var(--gray-400);
  margin-bottom: var(--space-3);
}

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

/* Hero / featured sections (Featured News, Editor's Picks) */
.hero {
  padding-block: var(--space-12);
}

.hero--highlight {
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.12), transparent 55%),
    radial-gradient(circle at bottom, rgba(129, 140, 248, 0.18), transparent 60%),
    #020617;
}

.hero__eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.hero__title {
  font-size: clamp(2.25rem, 4vw, 3rem);
  margin-bottom: var(--space-3);
}

.hero__subtitle {
  max-width: 38rem;
  color: var(--color-text-muted);
}

/* Simple badges for monetization / model explanations */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  background: rgba(15, 118, 110, 0.1);
  color: #a5f3fc;
  border: 1px solid rgba(45, 212, 191, 0.45);
}

.badge--warning {
  background: rgba(180, 83, 9, 0.12);
  color: #fed7aa;
  border-color: rgba(251, 146, 60, 0.5);
}

/* FAQ accordion basics (structure only, behavior via JS) */
.faq-item {
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.35);
  background-color: rgba(15, 23, 42, 0.96);
  padding: var(--space-4);
}

.faq-item + .faq-item {
  margin-top: var(--space-3);
}

.faq-item__question {
  font-size: var(--text-sm);
  font-weight: 600;
}

.faq-item__answer {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Newsletter / subscription box */
.newsletter-box {
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), rgba(129, 140, 248, 0.3));
  box-shadow: var(--shadow-soft);
  color: var(--gray-50);
}

.newsletter-box p {
  color: var(--gray-100);
}

/* Search bar wrapper (for main site search) */
.search-bar {
  position: relative;
}

.search-bar__input {
  padding-right: 2.8rem;
}

.search-bar__icon {
  position: absolute;
  right: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  pointer-events: none;
  color: var(--gray-500);
}

/* Navigation basics (for main site navigation) */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: linear-gradient(to right, rgba(15, 23, 42, 0.94), rgba(15, 23, 42, 0.86));
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.75rem;
}

.navbar__logo {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--text-sm);
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar__link {
  font-size: var(--text-sm);
  color: var(--gray-200);
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.navbar__link:hover {
  color: var(--gray-50);
}

.navbar__link--active {
  color: var(--gray-50);
  border-bottom-color: var(--color-primary);
}

/* Footer basics */
.footer {
  padding-block: var(--space-8);
  border-top: 1px solid rgba(148, 163, 184, 0.35);
  background: #020617;
}

.footer p {
  color: var(--gray-400);
  font-size: var(--text-sm);
}