/* ==========================================================================
   Base — reset, typography, layout primitives, utilities
   ========================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-body);
    font-weight: var(--fw-normal);
    line-height: var(--lh-body);
    letter-spacing: var(--tracking-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul[class], ol[class] {
    list-style: none;
}

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

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

button, input, select, textarea {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    background: none;
    border: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-normal);
    line-height: var(--lh-heading);
    letter-spacing: var(--tracking-tight);
    text-transform: uppercase;
    color: var(--color-text);
    text-wrap: balance;
}

::selection {
    background: var(--color-accent);
    color: var(--color-on-accent);
}

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

/* ---------- Skip link ---------- */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-4);
    z-index: 2000;
    padding: var(--space-3) var(--space-5);
    background: var(--color-accent);
    color: var(--color-on-accent);
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    border-radius: var(--radius-button);
    transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
    top: var(--space-4);
    color: var(--color-on-accent);
}

/* ---------- Layout container ---------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

@media (max-width: 1024px) {
    .container {
        padding-inline: var(--container-pad-tablet);
    }
}

@media (max-width: 640px) {
    .container {
        padding-inline: var(--container-pad-mobile);
    }
}

/* ---------- Section rhythm ---------- */
.section {
    padding-block: var(--section-pad);
}

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

.section--alt {
    background-color: var(--color-bg-alt);
}

.section--accent {
    background-color: var(--color-accent-red);
    color: var(--color-text-inverse);
}

@media (max-width: 768px) {
    .section {
        padding-block: var(--space-8);
    }
    .section--tight {
        padding-block: var(--space-7);
    }
}

/* ---------- Headings ---------- */
h1, .h1 {
    font-size: var(--fs-hero);
    line-height: var(--lh-tight);
}

h2, .h2 {
    font-size: var(--fs-section);
}

h3, .h3 {
    font-size: var(--fs-property);
}

h4, .h4 {
    font-size: var(--fs-sub);
}

/* ---------- Body copy ---------- */
.lead {
    font-size: var(--fs-sub);
    font-weight: var(--fw-light);
    line-height: var(--lh-heading);
    color: var(--color-text-secondary);
}

@media (max-width: 640px) {
    .lead {
        font-size: var(--fs-body);
        line-height: var(--lh-body);
    }
}

.text-secondary {
    color: var(--color-text-secondary);
}

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

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

/* ---------- Section header block ---------- */
.section-header {
    max-width: 720px;
    margin-bottom: var(--space-7);
}

.section-header--center {
    margin-inline: auto;
    text-align: center;
}

.section-header__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--fs-eyebrow);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
    color: var(--color-accent);
}

.section-header__eyebrow::before {
    content: "";
    width: 28px;
    height: 1px;
    background: currentColor;
    opacity: 0.6;
}

.section-header--center .section-header__eyebrow::after {
    content: "";
    width: 28px;
    height: 1px;
    background: currentColor;
    opacity: 0.6;
}

.section-header__title {
    font-size: var(--fs-section);
    margin-bottom: var(--space-4);
}

.section-header__intro {
    color: var(--color-text-secondary);
    font-size: var(--fs-body);
}

.section--accent .section-header__eyebrow,
.section--accent .section-header__title,
.section--accent .section-header__intro {
    color: var(--color-text-inverse);
}

.section--accent .section-header__intro {
    color: rgba(255, 255, 255, 0.78);
}

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

.hidden {
    display: none !important;
}

.is-disabled,
[disabled] {
    cursor: not-allowed;
    opacity: 0.6;
}

/* ---------- Scroll reveal primitives ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }
}