/* ═══════════════════════════════════════════
   FLUX — Design System Tokens
   Baseado em referências Rivian + Peak Design
   Fonts: Unbounded + Fahkwang (Google Fonts)
   ═══════════════════════════════════════════ */

:root {
  /* ── Cores ── */
  --color-black: #0a0a0a;
  --color-dark: #111118;
  --color-card: #151520;
  --color-card-hover: #1a1a28;
  --color-border: #1e1e2a;
  --color-white: #eeeef5;
  --color-muted: #9898b0;
  --color-muted-dark: #585878;
  
  /* Accentos */
  --color-accent: #a78bfa;        /* Roxo principal */
  --color-accent-dim: rgba(167, 139, 250, 0.08);
  --color-accent-hover: #8b74e0;
  
  /* Gradientes */
  --gradient-hero: linear-gradient(135deg, #0a0a0a 0%, #1a0a2e 50%, #0a0a0a 100%);
  --gradient-card: linear-gradient(180deg, #151520 0%, #111118 100%);
  
  /* Semânticas */
  --color-success: #4ade80;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #60a5fa;

  /* ── Tipografia ── */
  --font-heading: 'Unbounded', system-ui, sans-serif;
  --font-body: 'Fahkwang', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Font weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Type scale */
  --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: 2rem;       /* 32px */
  --text-4xl: 2.5rem;     /* 40px */
  --text-5xl: 3.5rem;     /* 56px */
  --text-6xl: 4.5rem;     /* 72px */
  
  /* Line heights */
  --leading-tight: 1.1;
  --leading-snug: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.6;
  
  /* Letter spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* ── Spacing (base 8px) ── */
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  --spacing-24: 6rem;     /* 96px */

  /* ── Border Radius ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* ── Transitions ── */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* ── Layout ── */
  --container-max: 1280px;
  --container-padding: 1.5rem;
  --header-height: 5rem;
  --section-gap: 6rem;
}

/* ── Dark theme (always dark) ── */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-white);
  background: var(--color-black);
  overflow-x: hidden;
}

/* ── Typography utilities ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

.heading-xl { font-size: var(--text-5xl); }
.heading-lg { font-size: var(--text-4xl); }
.heading-md { font-size: var(--text-3xl); }
.heading-sm { font-size: var(--text-2xl); }
.heading-xs { font-size: var(--text-xl); }

.body-lg { font-size: var(--text-lg); }
.body-base { font-size: var(--text-base); }
.body-sm { font-size: var(--text-sm); }
.body-xs { font-size: var(--text-xs); }

.tracking-wide { letter-spacing: var(--tracking-wide); }
.tracking-wider { letter-spacing: var(--tracking-wider); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-muted); }

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--color-muted);
}
.btn-ghost:hover {
  color: var(--color-white);
}

/* ── Section spacing ── */
.section {
  padding: var(--section-gap) 0;
}

/* ── Utilities ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}