:root {
    --ink: #12201f;
    --glaze: #2a4ba0;
    --glaze-dark: #1d3676;
    --celadon: #cfe3da;
    --celadon-deep: #9dc3b2;
    --paper: #f3f5f4;
    --ochre: #e0a93b;
    --line: #c9d3cf;

    --font-display: Georgia, "Times New Roman", serif;
    --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

    --space: clamp(1rem, 4vw, 2rem);
    --max-width: 68rem;
}

/* Base styles */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 4.5rem;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.6;
    color: var(--ink);
    background: var(--paper);
}

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

h1, h2, h3 {
    font-family: var(--font-display);
    line-height: 1.15;
    margin: 0 0 0.5em;
}

h1 {
    font-size: clamp(2.25rem, 7vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.6rem, 4vw, 2.25rem);
}

h3 {
    font-size: 1.25rem;
}

p {
    margin: 0 0 1em;
    max-width: 60ch;
}

a {
    color: var(--glaze);
}

:focus-visible {
    outline: 3px solid var(--ochre);
    outline-offset: 3px;
}

.container {
    width: min(100% - 2 * var(--space), var(--max-width));
    margin-inline: auto;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -4rem;
    background: var(--ink);
    color: #fff;
    padding: 0.5rem 1rem;
    z-index: 100;
}

.skip-link:focus {
    top: 1rem;
}

/* Buttons and links */
.btn {
    display: inline-block;
    background: var(--glaze);
    color: #fff;
    padding: 0.8rem 1.4rem;
    border: 0;
    border-radius: 0.4rem;
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn:hover {
    background: var(--glaze-dark);
}

.btn--small {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
}

.text-link {
    font-weight: 600;
}

/* Header and navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
}

.site-header.is-scrolled {
    box-shadow: 0 2px 10px rgba(18, 32, 31, 0.12);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 4rem;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
}

.nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: none;
    border: 1px solid var(--ink);
    border-radius: 0.4rem;
    padding: 0.45rem 0.8rem;
    font: inherit;
    font-weight: 600;
    color: var(--ink);
    cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
    display: block;
    width: 1.1rem;
    height: 2px;
    background: currentColor;
    transition: transform 0.2s, background-color 0.2s;
}

.nav-toggle__bars {
    position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
    content: "";
    position: absolute;
    left: 0;
}

.nav-toggle__bars::before {
    top: -6px;
}

.nav-toggle__bars::after {
    top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
    transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    display: none;
}

.site-nav.is-open {
    display: block;
}

.nav-list {
    list-style: none;
    margin: 0;
    padding: 0.5rem var(--space) 1.25rem;
}

.nav-list a:not(.btn) {
    display: block;
    padding: 0.8rem 0;
    color: var(--ink);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid var(--line);
}

.nav-list li:last-child {
    padding-top: 1rem;
}

/* Hero section */
.hero {
    background: var(--celadon);
    padding-block: clamp(2.5rem, 8vw, 5rem);
}

.hero-inner {
    display: grid;
    gap: 2.5rem;
    align-items: center;
}

.lead {
    font-size: 1.2rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.25rem;
}

.svg-shadow {
    fill: rgba(18, 32, 31, 0.12);
}

.pot--tall {
    fill: var(--glaze);
}

.pot--bowl {
    fill: var(--celadon-deep);
}

.pot--cup {
    fill: var(--ochre);
}

.pot-band {
    fill: none;
    stroke: var(--celadon);
    stroke-width: 6;
    stroke-linecap: round;
}

/* Feature section */
.features {
    padding-block: clamp(3rem, 8vw, 5.5rem);
}

.feature-grid {
    list-style: none;
    margin: 2rem 0 0;
    padding: 0;
    display: grid;
    gap: 1.75rem;
}

.feature {
    border-top: 3px solid var(--ink);
    padding-top: 1rem;
}

/* Class process */
.process {
    background: var(--ink);
    color: var(--paper);
    padding-block: clamp(3rem, 8vw, 5rem);
}

.process a {
    color: var(--ochre);
}

.process-inner {
    display: grid;
    gap: 1.5rem;
}

.steps {
    margin: 0;
    padding-left: 1.4rem;
    display: grid;
    gap: 1rem;
}

.steps li::marker {
    color: var(--ochre);
    font-family: var(--font-display);
    font-weight: 700;
}

.steps strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.15rem;
}

/* Signup form */
.join {
    padding-block: clamp(3rem, 8vw, 5rem);
}

.join-inner {
    display: grid;
    gap: 2rem;
    align-items: center;
}

.join-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.join-form__row {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.join-form input {
    font: inherit;
    padding: 0.8rem 1rem;
    border: 2px solid var(--ink);
    border-radius: 0.4rem;
    background: #fff;
    width: 100%;
}

.join-form input[aria-invalid="true"] {
    border-color: #b3261e;
}

.form-message {
    min-height: 1.6em;
    margin: 0.6rem 0 0;
    font-weight: 500;
}

.form-message.is-error {
    color: #b3261e;
}

.form-message.is-success {
    color: #1b6b3a;
}

/* Footer */
.site-footer {
    background: var(--celadon);
    padding-top: 2.5rem;
}

.footer-grid {
    display: grid;
    gap: 1.5rem;
}

.footer-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.15rem;
    margin-bottom: 0.3em;
}

address {
    font-style: normal;
}

.footer-bottom {
    margin-top: 2rem;
    padding-block: 1rem;
    border-top: 1px solid var(--celadon-deep);
}

/* Tablet layout */
@media (min-width: 700px) {
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }

    .footer-grid {
        grid-template-columns: 2fr 2fr 1fr;
    }

    .join-inner {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }

    .join-form__row {
        flex-direction: row;
    }

    .join-form input {
        flex: 1;
    }
}

/* Desktop layout */
@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: block;
        border: 0;
        background: none;
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 2rem;
        padding: 0;
    }

    .nav-list a:not(.btn) {
        border: 0;
        padding: 0.4rem 0;
    }

    .nav-list a:not(.btn):hover {
        text-decoration: underline;
        text-underline-offset: 6px;
    }

    .nav-list li:last-child {
        padding-top: 0;
    }

    .hero-inner {
        grid-template-columns: 1.1fr 0.9fr;
        gap: 4rem;
    }

    .process-inner {
        grid-template-columns: 1fr 1.4fr;
        gap: 4rem;
    }
}

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

    * {
        transition: none !important;
    }
}