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

:root {
  /* Colors */
  --color-bg: #050816; /* deep, modern background */
  --color-surface: #0b1020;
  --color-surface-alt: #10172f;
  --color-text: #f9fafb;
  --color-text-muted: #9ca3af;

  --color-primary: #2563eb; /* deep blue */
  --color-primary-soft: rgba(37, 99, 235, 0.12);
  --color-accent: #a3e635; /* energetic lime */
  --color-accent-soft: rgba(163, 230, 53, 0.15);

  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-danger: #ef4444;

  --color-border-subtle: rgba(148, 163, 184, 0.35);
  --color-border-strong: rgba(148, 163, 184, 0.6);
  --color-overlay: rgba(15, 23, 42, 0.7);

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;

  --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 */
  --font-size-5xl: 3rem;    /* 48px */

  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (px): 0–96 */
  --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-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.35);
  --shadow-strong: 0 22px 45px rgba(15, 23, 42, 0.7);
  --shadow-focus: 0 0 0 2px rgba(15, 23, 42, 1), 0 0 0 4px rgba(163, 230, 53, 0.9);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 200ms ease-out;
  --transition-slow: 300ms ease-out;

  /* Layout */
  --container-max-width: 1120px;
  --container-padding-x: 1.25rem;
}

@media (min-width: 1024px) {
  :root {
    --font-size-base: 1.0625rem; /* 17px */
  }
}

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

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

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

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

body {
  min-height: 100vh;
}

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

img {
  display: block;
}

picture {
  display: block;
}

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

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

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

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

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

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}

textarea {
  resize: vertical;
}

[hidden] {
  display: none !important;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background: radial-gradient(circle at top, #0b1120 0, #020617 60%, #000 100%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

/* Headings: bold, energetic hierarchy */

h1,
 h2,
 h3,
 h4,
 h5,
 h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-3);
}

h5 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
  max-width: 68ch; /* comfortable line length */
}

strong {
  font-weight: 700;
}

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

/* Links */

a {
  position: relative;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-normal), opacity var(--transition-fast);
}



a:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-xs);
}

/* ========================================================================== 
   Accessibility
   ========================================================================== */

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

*:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

/* 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;
}

.sr-only-focusable:focus {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Reduced motion */

@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 containers */

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

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section--tight {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

/* 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-column {
  display: flex;
  flex-direction: column;
}

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

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

.gap-sm {
  gap: var(--space-3);
}

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

.gap-lg {
  gap: var(--space-6);
}

/* 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);
  }
}

/* Text alignment */

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

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

.text-uppercase {
  text-transform: uppercase;
}

/* Spacing utilities (commonly used) */

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-2); }
.mt-sm { margin-top: var(--space-3); }
.mt-md { margin-top: var(--space-4); }
.mt-lg { margin-top: var(--space-6); }
.mt-xl { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-2); }
.mb-sm { margin-bottom: var(--space-3); }
.mb-md { margin-bottom: var(--space-4); }
.mb-lg { margin-bottom: var(--space-6); }
.mb-xl { margin-bottom: var(--space-8); }

.pt-0 { padding-top: 0; }
.pt-md { padding-top: var(--space-4); }
.pt-lg { padding-top: var(--space-6); }

.pb-0 { padding-bottom: 0; }
.pb-md { padding-bottom: var(--space-4); }
.pb-lg { padding-bottom: var(--space-6); }

/* Badges / labels (useful for class types, intensity, etc.) */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

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

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

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-normal),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), #1d4ed8);
  border-color: rgba(37, 99, 235, 0.9);
  color: #f9fafb;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.45);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.6);
}

.btn--accent {
  background: linear-gradient(135deg, var(--color-accent), #84cc16);
  border-color: rgba(163, 230, 53, 0.9);
  color: #020617;
  box-shadow: 0 12px 30px rgba(163, 230, 53, 0.4);
}

.btn--accent:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(163, 230, 53, 0.6);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  background: rgba(15, 23, 42, 0.9);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn:focus-visible {
  box-shadow: var(--shadow-focus);
}

/* Inputs */

.input,
.select,
.textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  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-accent);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 1), 0 0 0 3px rgba(163, 230, 53, 0.7);
}

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

label {
  display: inline-block;
  margin-bottom: 0.35rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.form-field {
  margin-bottom: var(--space-4);
}

.form-helper {
  margin-top: 0.25rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.form-error {
  margin-top: 0.25rem;
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* Card */

.card {
  position: relative;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 50%),
              radial-gradient(circle at bottom right, rgba(163, 230, 53, 0.12), transparent 55%),
              var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(18px);
}

.card--elevated {
  box-shadow: var(--shadow-strong);
}

.card__header {
  margin-bottom: var(--space-4);
}

.card__title {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-snug);
}

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

.card__body {
  font-size: var(--font-size-sm);
}

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

/* Pill for highlights like memberships & classes */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.85);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.pill--accent {
  border-color: rgba(163, 230, 53, 0.7);
  color: var(--color-accent);
}

/* Hero headline helper (for consistent hero sections) */

.hero-kicker {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 40rem;
}

/* Utility chip for schedule / time tags */

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.3);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.chip--primary {
  border-color: rgba(37, 99, 235, 0.7);
  color: var(--color-primary);
}

.chip--accent {
  border-color: rgba(163, 230, 53, 0.7);
  color: var(--color-accent);
}

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