/* ==========================================================================
   styles.css — Global tokens, reset, base typography
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-bg:            #FFFFFF;
  --color-bg-surface:    #F5F7F6;
  --color-bg-card:       #FFFFFF;
  --color-bg-card-hover: #F5F7F6;
  --color-border:        rgba(0, 0, 0, 0.08);
  --color-border-hover:  rgba(31, 122, 99, 0.5);

  --color-accent:        #1F7A63;
  --color-accent-light:  #1F7A63;
  --color-accent-dark:   #186553;
  --color-accent-glow:   rgba(31, 122, 99, 0.08);

  --color-whatsapp:      #25d366;
  --color-whatsapp-dark: #1da851;

  --color-text-primary:  #1A1A1A;
  --color-text-secondary:#4F5B57;
  --color-text-muted:    #7A8A84;
  --color-text-inverse:  #FFFFFF;

  --color-success:       #1F7A63;
  --color-error:         #ef4444;

  /* Typography */
  --font-family:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --font-size-xs:   0.75rem;   /* 12px */
  --font-size-sm:   0.875rem;  /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-md:   1.125rem;  /* 18px */
  --font-size-lg:   1.25rem;   /* 20px */
  --font-size-xl:   1.5rem;    /* 24px */
  --font-size-2xl:  1.875rem;  /* 30px */
  --font-size-3xl:  2.25rem;   /* 36px */
  --font-size-4xl:  3rem;      /* 48px */
  --font-size-5xl:  3.75rem;   /* 60px */
  --font-size-6xl:  4.5rem;    /* 72px */

  --line-height-tight:  1.15;
  --line-height-snug:   1.35;
  --line-height-normal: 1.6;
  --line-height-relaxed:1.75;

  --font-weight-light:   300;
  --font-weight-regular: 400;
  --font-weight-medium:  500;
  --font-weight-semibold:600;
  --font-weight-bold:    700;
  --font-weight-extrabold:800;
  --font-weight-black:   900;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Borders */
  --radius-sm:  0.25rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md:  0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg:  0 8px 32px rgba(0, 0, 0, 0.10);
  --shadow-xl:  0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow:0 0 32px var(--color-accent-glow);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index scale */
  --z-below:   -1;
  --z-base:     0;
  --z-raised:   10;
  --z-navbar:   100;
  --z-modal:    200;
  --z-toast:    300;
}

/* --------------------------------------------------------------------------
   2. Box-sizing + Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --------------------------------------------------------------------------
   3. Base Elements
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

p {
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-dark);
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

ul {
  list-style: none;
}

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

/* Visually hidden (accessible) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Line break helper */
.break-lg { display: block; }