/* Global styles — Boston Scientific theme
   All values sourced from tokens.css. Never hardcode colors, sizes, or fonts here.
*/

body {
    font-family: var(--font-family-sans);
    font-size: var(--fs-body);
    line-height: var(--lh-relaxed);
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Heading elements — sentence case per BSC guidelines */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-sans);
    line-height: var(--lh-tight);
    color: var(--neutral-00);
    margin: 0 0 var(--space-4);
}

h1 { font-size: var(--fs-h1); font-weight: var(--font-weight-bold); }
h2 { font-size: var(--fs-h2); font-weight: var(--font-weight-bold); }
h3 { font-size: var(--fs-h3); font-weight: var(--font-weight-semibold); }
h4 { font-size: var(--fs-h4); font-weight: var(--font-weight-semibold); }
h5 { font-size: var(--fs-h5); font-weight: var(--font-weight-medium); }
h6 { font-size: var(--fs-h6); font-weight: var(--font-weight-medium); }

/* Display style — use once per page, short lines only */
.display {
    font-size: var(--fs-display);
    font-weight: var(--font-weight-bold);
    line-height: var(--lh-tight);
    color: var(--neutral-00);
}

/* Text styles */
.text-assertive { font-size: var(--fs-body-assertive); }
.text-body      { font-size: var(--fs-body); }
.text-subtle    { font-size: var(--fs-body-subtle); color: var(--color-text-subtle); }
.text-small     { font-size: var(--fs-small); color: var(--color-text-subtle); }

p { margin: 0 0 var(--space-4); }

/* Links — blue is reserved for clickability */
a {
    color: var(--color-link);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--color-link-hover);
}

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

/* Buttons */
.btn {
    font-family: var(--font-family-sans);
    font-weight: var(--font-weight-semibold);
    font-size: var(--fs-body);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    display: inline-block;
    text-decoration: none;
    line-height: 1;
    min-height: 2.75rem;
}

.btn:focus-visible {
    outline: 2px solid var(--color-focus-ring);
    outline-offset: 2px;
}

.btn-primary {
    background-color: var(--color-interactive);
    color: var(--neutral-100);
}

.btn-primary:hover {
    background-color: var(--color-interactive-hover);
    color: var(--neutral-100);
}

.btn-primary:active {
    background-color: var(--color-interactive-active);
}

.btn-secondary {
    background-color: var(--neutral-20);
    color: var(--neutral-100);
}

.btn-secondary:hover {
    background-color: var(--neutral-00);
    color: var(--neutral-100);
}

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

.btn-outline:hover {
    background-color: var(--color-interactive);
    color: var(--neutral-100);
}

.btn-ghost {
    background: transparent;
    color: var(--color-interactive);
}

.btn-ghost:hover {
    background-color: var(--color-interactive-tint);
    color: var(--color-interactive-hover);
}

/* Container */
.container {
    max-width: 1650px;
    margin: 0 auto;
    padding: 0 var(--space-5);
}

/* Text utilities */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }
.text-muted  { color: var(--color-text-subtle); }
.text-bold   { font-weight: var(--font-weight-bold); }
.text-light  { font-weight: var(--font-weight-regular); }

/* Color utilities — respect BSC rule: interactive blue only for actionable intent */
.text-primary { color: var(--color-interactive); }
.bg-primary   { background-color: var(--color-interactive); color: var(--neutral-100); }
.bg-light     { background-color: var(--color-bg-subtle); }
.bg-dark      { background-color: var(--neutral-20); color: var(--neutral-100); }

/* Feedback — error */
.text-error   { color: var(--feedback-error-40); }
.bg-error     { background-color: var(--feedback-error-95); color: var(--feedback-error-20); }