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

:root {
  /* Colors */
  --color-background: #050814; /* deep, modern backdrop */
  --color-surface: #0e1224;
  --color-surface-alt: #12182b;
  --color-text: #f5f7fb;
  --color-text-muted: #a5b0c6;
  --color-primary: #1f8bff; /* bold blue */
  --color-primary-soft: rgba(31, 139, 255, 0.12);
  --color-primary-strong: #0060d2;
  --color-accent: #21c48c; /* fresh green */
  --color-accent-soft: rgba(33, 196, 140, 0.14);
  --color-success: #21c48c;
  --color-warning: #ffb020;
  --color-danger: #f55353;

  /* Neutral grays (cool, for dark UI) */
  --gray-50: #0b0f1c;
  --gray-100: #121826;
  --gray-200: #1b2336;
  --gray-300: #252f45;
  --gray-400: #364160;
  --gray-500: #4a5678;
  --gray-600: #6b7594;
  --gray-700: #8f97b1;
  --gray-800: #c1c6d8;
  --gray-900: #e6e8f3;

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

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

  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-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-7: 1.75rem;  /* 28px */
  --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: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-full: 999px;

  /* Shadows (energetic but controlled) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-glow-primary: 0 0 0 1px rgba(31, 139, 255, 0.5),
    0 0 18px rgba(31, 139, 255, 0.35);

  /* Transitions */
  --transition-fast: 140ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 320ms ease-out;

  /* Layout */
  --container-max-width: 1120px;
  --container-padding-x: var(--space-4);

  /* Focus */
  --focus-outline-color: #46d6a4;
  --focus-outline-width: 3px;
  --focus-outline-offset: 3px;
}

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

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

button,
input,
select,
textarea {
  margin: 0;
  font: inherit;
  color: inherit;
  background: none;
  border-radius: 0;
}

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

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

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

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

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  background: radial-gradient(circle at top left, #101833 0, #050814 52%, #02030a 100%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

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

h1 {
  font-size: clamp(2.25rem, 2.3rem + 1vw, 3rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

h2 {
  font-size: clamp(1.75rem, 1.8rem + 0.5vw, 2.25rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

h3 {
  font-size: clamp(1.5rem, 1.5rem + 0.3vw, 1.875rem);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

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

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

h6 {
  font-size: var(--font-size-md);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

p {
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

strong {
  font-weight: 600;
}

code,
pre {
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

pre {
  padding: var(--space-3);
  background: var(--gray-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* Links – clean and energetic */

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

a:hover {
  color: var(--color-accent);
  text-shadow: 0 0 12px rgba(33, 196, 140, 0.35);
}

a:active {
  opacity: 0.7;
}

/* Lists */

ul,
ol {
  padding-left: var(--space-5);
  margin-bottom: var(--space-3);
}


/* ==========================================================================
   Accessibility & Motion
   ========================================================================== */

:focus {
  outline: none;
}

:focus-visible {
  outline: var(--focus-outline-width) solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

/* Layout containers */

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

.section {
  padding-block: var(--space-12);
}

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

/* Centering 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-1); }
.gap-sm { gap: var(--space-2); }
.gap-md { gap: var(--space-3); }
.gap-lg { gap: var(--space-4); }
.gap-xl { gap: var(--space-6); }

/* Grid helpers */

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.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);
  }
}

/* Alignment & text helpers */

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

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

/* Spacing utilities (margin & padding, limited core set) */

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-1); }
.mt-sm { margin-top: var(--space-2); }
.mt-md { margin-top: var(--space-3); }
.mt-lg { margin-top: var(--space-4); }
.mt-xl { margin-top: var(--space-6); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-1); }
.mb-sm { margin-bottom: var(--space-2); }
.mb-md { margin-bottom: var(--space-3); }
.mb-lg { margin-bottom: var(--space-4); }
.mb-xl { margin-bottom: var(--space-6); }

.py-sm { padding-block: var(--space-2); }
.py-md { padding-block: var(--space-3); }
.py-lg { padding-block: var(--space-4); }

.px-sm { padding-inline: var(--space-2); }
.px-md { padding-inline: var(--space-3); }
.px-lg { padding-inline: var(--space-4); }

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

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

/* Buttons: primary action look for dynamic, energetic brand */

.button,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  --btn-bg: var(--color-primary);
  --btn-bg-hover: var(--color-primary-strong);
  --btn-bg-active: #004099;
  --btn-color: #ffffff;
  --btn-radius: var(--radius-full);
  --btn-shadow: var(--shadow-sm);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding-inline: var(--space-5);
  padding-block: 0.7rem;
  border-radius: var(--btn-radius);
  border: none;
  background: linear-gradient(135deg, var(--btn-bg), var(--color-accent));
  color: var(--btn-color);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-align: center;
  box-shadow: var(--btn-shadow);
  transition:
    background var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-fast),
    opacity var(--transition-fast),
    filter var(--transition-fast);
}

.button--primary {
  /* alias for semantics */
}

.button--outline {
  --btn-bg: transparent;
  --btn-color: var(--color-text);
  background: linear-gradient(var(--gray-100), var(--gray-100)) padding-box,
    linear-gradient(135deg, var(--color-primary), var(--color-accent)) border-box;
  border: 1px solid transparent;
  box-shadow: none;
}

.button--ghost {
  --btn-bg: transparent;
  --btn-color: var(--color-text);
  background: transparent;
  border-radius: var(--radius-full);
  padding-inline: var(--space-4);
  padding-block: 0.6rem;
  box-shadow: none;
}

.button:hover,
button:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
input[type="reset"]:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.button:active,
button:active,
input[type="button"]:active,
input[type="submit"]:active,
input[type="reset"]:active {
  transform: translateY(0);
  filter: brightness(0.95);
  box-shadow: var(--shadow-xs);
}

.button:disabled,
button:disabled,
input[type="button"]:disabled,
input[type="submit"]:disabled,
input[type="reset"]:disabled,
.button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

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

/* Inputs & form controls */

.input,
textarea,
select,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
input[type="search"] {
  width: 100%;
  padding-inline: var(--space-3);
  padding-block: 0.7rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-300);
  background-color: var(--gray-100);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-fast);
}

.input::placeholder,
textarea::placeholder,
input::placeholder {
  color: var(--gray-600);
}

.input:focus-visible,
textarea:focus-visible,
select:focus-visible,
input[type="text"]:focus-visible,
input[type="email"]:focus-visible,
input[type="password"]:focus-visible,
input[type="tel"]:focus-visible,
input[type="number"]:focus-visible,
input[type="search"]:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(31, 139, 255, 0.7);
  outline: none;
}

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

label {
  display: inline-block;
  margin-bottom: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

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

.form-help {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--gray-700);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* Cards – used for services, membership options, trainers */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background: linear-gradient(145deg, var(--color-surface), var(--color-surface-alt));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base),
    background var(--transition-base);
}

.card--primary {
  border-image: linear-gradient(135deg, var(--color-primary), var(--color-accent)) 1;
  border-width: 1px;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(33, 196, 140, 0.5);
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}

.card-title {
  font-size: var(--font-size-xl);
  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 {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

/* Badges & tags – useful for plans, class intensity, etc. */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-2);
  padding-block: 0.25rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

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

.badge--neutral {
  background-color: var(--gray-200);
  color: var(--color-text);
}

/* Hero overlay utility – for dynamic imagery */

.hero-overlay {
  position: relative;
}

.hero-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.2) 60%, rgba(0, 0, 0, 0.85) 100%);
  pointer-events: none;
}

.hero-overlay > * {
  position: relative;
  z-index: 1;
}

/* Chips & pills – for filters (e.g., classes, difficulty) */

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding-inline: var(--space-3);
  padding-block: 0.35rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--gray-300);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background-color: var(--gray-100);
}

.chip--active {
  border-color: var(--color-accent);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
}

/* Toast / alert base – quick feedback for forms */

.alert {
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.alert--success {
  background-color: rgba(33, 196, 140, 0.1);
  border: 1px solid rgba(33, 196, 140, 0.55);
  color: var(--color-success);
}

.alert--warning {
  background-color: rgba(255, 176, 32, 0.1);
  border: 1px solid rgba(255, 176, 32, 0.6);
  color: var(--color-warning);
}

.alert--danger {
  background-color: rgba(245, 83, 83, 0.1);
  border: 1px solid rgba(245, 83, 83, 0.6);
  color: var(--color-danger);
}

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