/* palette of the app (Wasm/Layout/AppTheme.cs in kikoubook) */
:root {
    --primary: #732A9B;
    --primary-contrast: #FFFFFF;
    --secondary: #E8664A;
    --background: #FAF6FC;
    --surface: #FFFFFF;
    --text: #2B1B33;
    --text-secondary: #6E5C78;
    --lines: #EADFF0;
    --radius: 12px;
    --width: 1080px;
    /* rounded system font, nothing to download */
    --font: ui-rounded, "SF Pro Rounded", Nunito, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #D69BE0;
        --primary-contrast: #2A1033;
        --secondary: #FF9B82;
        --background: #17121B;
        --surface: #221A28;
        --text: #F1E9F5;
        --text-secondary: #B9A8C2;
        --lines: #3A2E42;
    }
}

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

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.6;
}

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

h1, h2, h3 {
    line-height: 1.2;
    text-wrap: balance;
}

img {
    max-width: 100%;
    height: auto;
}

.button {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    background: var(--primary);
    color: var(--primary-contrast);
    font-weight: 700;
    text-decoration: none;
}

.button.secondary {
    background: transparent;
    color: var(--primary);
}

.note {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* logo (AnimatedLogo), animated like the logo of the app (kikoubook Wasm/wwwroot/css/app.css): a hop when the page
   loads, hops while hovered with its ribbon swinging, a blink from time to time; transforms only, nothing when motion
   is reduced */

.logo {
    flex-shrink: 0;
    overflow: visible;
}

.logo-jump, .logo-body {
    transform-box: fill-box;
    transform-origin: 50% 100%;
}

.logo-flag, .logo-ribbon {
    transform-box: fill-box;
    transform-origin: 50% 0;
}

.logo-eye {
    transform-box: fill-box;
    transform-origin: center;
    animation: logo-blink 7s infinite;
}

.logo-jump {
    animation: logo-hop 0.7s ease-in-out;
}

.logo-flag {
    animation: logo-swing 0.7s ease-in-out;
}

/* the hero logo hops again from time to time: a hop of 0.7s every 4s (logo-hop / logo-swing squeezed in the first 17.5%
   of the cycle, a css animation having no delay between its iterations) */
.hero-logo .logo-jump {
    animation: logo-hop-idle 4s ease-in-out infinite;
}

.hero-logo .logo-flag {
    animation: logo-swing-idle 4s ease-in-out infinite;
}

@media (hover: hover) {
    .brand:hover .logo-body, .hero-logo:hover .logo-body {
        animation: logo-hop 0.7s ease-in-out infinite;
    }

    .brand:hover .logo-ribbon, .hero-logo:hover .logo-ribbon {
        animation: logo-swing 0.7s ease-in-out infinite;
    }
}

/* px: units of the viewBox (368 wide) */
@keyframes logo-hop {
    0%, 20%, 100% {
        transform: translateY(0) scale(1, 1);
    }
    36% {
        transform: translateY(0) scale(1.06, 0.94);
    }
    65% {
        transform: translateY(-40px) scale(0.97, 1.03);
    }
}

@keyframes logo-swing {
    0%, 20%, 100% {
        transform: rotate(0);
    }
    45% {
        transform: rotate(10deg);
    }
    75% {
        transform: rotate(-8deg);
    }
}

@keyframes logo-hop-idle {
    0%, 3.5%, 17.5%, 100% {
        transform: translateY(0) scale(1, 1);
    }
    6.3% {
        transform: translateY(0) scale(1.06, 0.94);
    }
    11.4% {
        transform: translateY(-40px) scale(0.97, 1.03);
    }
}

@keyframes logo-swing-idle {
    0%, 3.5%, 17.5%, 100% {
        transform: rotate(0);
    }
    7.9% {
        transform: rotate(10deg);
    }
    13.1% {
        transform: rotate(-8deg);
    }
}

@keyframes logo-blink {
    0%, 94%, 100% {
        transform: scaleY(1);
    }
    97% {
        transform: scaleY(0.1);
    }
}

@media (prefers-reduced-motion: reduce) {
    .logo-jump, .logo-flag, .logo-eye,
    .hero-logo .logo-jump, .hero-logo .logo-flag,
    .brand:hover .logo-body, .hero-logo:hover .logo-body,
    .brand:hover .logo-ribbon, .hero-logo:hover .logo-ribbon {
        animation: none;
    }
}

/* header and footer */

.site-header, .site-footer, main {
    max-width: var(--width);
    margin: 0 auto;
    padding: 0 1rem;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-block: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

.header-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.site-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 4rem;
    padding-block: 2rem;
    border-top: 1px solid var(--lines);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.site-footer nav {
    display: flex;
    gap: 1.5rem;
}

/* home */

section {
    padding-block: 3rem;
}

.hero {
    display: grid;
    grid-template-columns: 3fr 2fr;
    align-items: center;
    gap: 2rem;
}

.hero h1 {
    margin: 0.5rem 0 1rem;
    font-size: clamp(2.2rem, 6vw, 3.6rem);
    color: var(--primary);
}

.eyebrow {
    margin: 0;
    color: var(--secondary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
}

.hero-logo {
    justify-self: center;
}

.lead {
    font-size: 1.2rem;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.steps, .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    padding: 0;
    list-style: none;
}

.steps {
    counter-reset: step;
}

.steps li, .features li {
    padding: 1.25rem;
    border: 1px solid var(--lines);
    border-radius: var(--radius);
    background: var(--surface);
}

.steps li::before {
    counter-increment: step;
    content: counter(step);
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background: var(--secondary);
    color: #FFFFFF;
    font-weight: 700;
}

.steps h3, .features h3 {
    margin: 0.75rem 0 0.5rem;
}

.features h3 {
    margin-top: 0;
    color: var(--primary);
}

.steps p, .features p {
    margin: 0;
}

.highlight {
    margin-block: 2rem;
    padding: 2rem;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--lines);
}

.closing, .not-found {
    text-align: center;
}

/* legal pages */

.legal {
    max-width: 720px;
    padding-block: 2rem;
}

.legal h2 {
    margin-top: 2rem;
    font-size: 1.3rem;
}

@media (max-width: 720px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .hero-logo {
        display: none;
    }

    .header-links .button {
        display: none;
    }
}