@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');
@import './design-tokens.css';

/* CSS Reset & Globals */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family-sans);
    background-color: transparent;
    /* Changed for parallax, html has base */
    color: var(--color-text-primary);
    line-height: var(--lh-base);
    font-size: var(--text-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    background-color: var(--color-base);
}

/* Typography Defaults */
h1,
h2,
h3,
.display {
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    text-wrap: balance;
}

.display {
    font-size: var(--text-display);
    line-height: var(--lh-tight);
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--text-h1);
    line-height: var(--lh-snug);
    letter-spacing: -0.01em;
}

h2 {
    font-size: var(--text-h2);
    line-height: var(--lh-heading);
}

h3 {
    font-size: var(--text-h3);
    line-height: var(--lh-heading);
}

p {
    margin-bottom: var(--space-4);
    max-width: 70ch;
    /* Optimal reading measure */
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

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

ul,
ol {
    list-style: none;
}

/* Layout Utilities */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding-inline: var(--container-padding);
}

.container-narrow {
    max-width: var(--container-narrow-width);
    margin: 0 auto;
    padding-inline: var(--container-padding);
}

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

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

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

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

.flex-col {
    flex-direction: column;
}

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

.justify-between {
    justify-content: space-between;
}

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

/* Typography Utilities */
.text-secondary {
    color: var(--color-text-secondary);
}

.eyebrow {
    font-size: var(--text-caption);
    line-height: var(--lh-caption);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--color-text-secondary);
    display: block;
    margin-bottom: var(--space-2);
}

.fluid-text-large {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    line-height: 1.4;
}

/* Visually Hidden for Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Global SVG Parallax Background */
.global-bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -10;
    pointer-events: none;
    overflow: hidden;
    background-color: #f4f6f9;
    /* EXACT hero-test-9 color ensures white-on-white blend */
    opacity: 0;
    transition: opacity 3s ease-in-out;
}

body.typing-complete .global-bg-canvas {
    opacity: 1;
}

.parallax-svg {
    width: 150vw;
    height: 450vw;
    /* 1:3 ratio cleanly mapping our extended viewBox */
    position: absolute;
    top: -25vh;
    left: -25vw;
    will-change: transform;
}

path.strand {
    fill: none;
    stroke: #f4f6f9;
    stroke-linecap: round;
    filter: url(#neu-shadow);
}

path.strand-alt {
    fill: none;
    stroke: #edf0f5;
    stroke-linecap: round;
    filter: url(#neu-shadow-deep);
}

.v1-s1 {
    animation: driftX 25s infinite alternate ease-in-out;
    transform-origin: center;
}

.v1-s2 {
    animation: driftX 35s infinite alternate-reverse ease-in-out;
    transform-origin: center;
}

.v1-s3 {
    animation: driftX 30s infinite alternate ease-in-out;
    transform-origin: center;
}

@keyframes driftX {
    0% {
        transform: translateX(-5vw);
    }

    100% {
        transform: translateX(5vw);
    }
}