/* chiengpt.com — page d'entrée (/), aussi chargée par /settings/ pour ses boutons et ses champs.
   Direction : « Vous lancez, il rapporte. » Encre presque noire, un seul accent (jaune balle de tennis
   par défaut), le nom du chien en très grand avec une balle pour point final. */

:root {
    --on-accent: #111111;
    --bg: #f4f4f3;
    --bg-2: #ffffff;
    --bg-3: #ebeae7;
    --fg: #161616;
    --dim: #3a3a3a;
    --border: #e4e1da;
    --accent: #d4f03c;
    --ok: #1a7f46;
    --ko: #c23b3b;
    --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --max: 1240px;
    --gutter: clamp(1rem, 4vw, 2.5rem);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

body.dark-theme {
    --bg: #0e0e0e;
    --bg-2: #171717;
    --bg-3: #1f1f1f;
    --fg: #f2f2f0;
    --dim: #b4b4b0;
    --border: #2a2a2a;
    --ok: #4cc283;
    --ko: #f07171;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-sans);
    font-size: 1.1rem;
    line-height: 1.55;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    overflow-x: clip;
}

a { color: inherit; }
.hidden { display: none !important; }
:focus-visible { outline: 2px solid var(--accent-ink, var(--fg)); outline-offset: 3px; border-radius: 6px; }

main { flex: 1; width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter) clamp(4rem, 10vw, 8rem); }

/* ─── Le nom, la balle ─── */
.hero { padding: clamp(1.5rem, 6vw, 5rem) 0 clamp(3.5rem, 9vw, 7.5rem); }
.hero-name {
    --n: 8;
    /* Le nom remplit la largeur sans jamais déborder, quelle que soit sa longueur. */
    font-size: min(14rem, calc((min(100vw, var(--max)) - 2 * var(--gutter)) / (var(--n) * .58 + .35)));
    font-weight: 800;
    letter-spacing: -0.055em;
    line-height: .86;
    white-space: nowrap;
    margin-left: -.04em;
}
.hero-name .ball {
    margin-left: .04em;
    cursor: pointer;
    transform-origin: 50% 100%;
    -webkit-tap-highlight-color: transparent;
}
.hero-name .ball:focus-visible { outline-offset: .04em; border-radius: 50%; }

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 30rem);
    gap: clamp(2rem, 6vw, 6rem);
    align-items: end;
    margin-top: clamp(2rem, 5vw, 4rem);
}
.hero-tagline {
    font-size: clamp(2.1rem, 5.2vw, 4.4rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.04em;
    max-width: 11ch;
    text-wrap: balance;
}
.hero-sub { color: var(--fg); font-size: 1.15rem; line-height: 1.55; }

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .75rem 1.75rem;
    margin-top: 2rem;
}
.link-go {
    font-weight: 600;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: .35em;
    text-decoration-color: color-mix(in srgb, var(--fg) 25%, transparent);
    transition: text-decoration-color .25s ease;
}
.link-go:hover { text-decoration-color: var(--fg); }

/* ─── Boutons et champs (partagés avec /settings/) ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .95rem 1.6rem;
    border-radius: 999px;
    border: 0;
    background: var(--bg-3);
    color: var(--fg);
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none !important; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-big { font-size: 1.1rem; padding: 1.1rem 2rem; }

.already {
    margin: 1.5rem 0 0;
    padding: .9rem 1.1rem;
    border-radius: 14px;
    background: var(--bg-2);
    font-size: .98rem;
}
.already strong { display: block; margin-bottom: .1rem; }
.already strong::before {
    content: "";
    display: inline-block;
    width: .6em; height: .6em;
    margin-right: .45em;
    border-radius: 50%;
    background: var(--ok);
}
.already span { color: var(--dim); }

/* ─── Trois façons ─── */
.ways-title {
    font-size: clamp(1.6rem, 3.4vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.05;
    margin-bottom: clamp(1.25rem, 3vw, 2rem);
}
.ways-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; }
.way {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: .4rem;
    min-height: 15rem;
    padding: 1.6rem 1.6rem 1.4rem;
    border-radius: 1.5rem;
    background: var(--bg-2);
    text-decoration: none;
    transition: background .35s var(--ease-out), transform .5s var(--ease-out);
}
.way strong { font-size: clamp(1.45rem, 2.4vw, 1.9rem); font-weight: 700; letter-spacing: -0.035em; line-height: 1.1; }
.way > span:not(.way-go) { color: var(--dim); font-size: 1.05rem; max-width: 22ch; }
.way-go { margin-top: auto; font-weight: 600; font-size: .98rem; display: inline-flex; align-items: center; gap: .4rem; }
/* La balle se pose sur la façon que l'on vise. */
.way::after {
    content: "";
    position: absolute;
    top: 1.6rem; right: 1.6rem;
    width: 1.1rem; height: 1.1rem;
    border-radius: 50%;
    background: var(--accent);
    transform: translateY(-.6rem) scale(0);
    transition: transform .55s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@media (hover: hover) {
    .way:hover { background: var(--bg-3); }
    .way:hover::after { transform: translateY(0) scale(1); }
    .way:hover .way-go span[aria-hidden] { transform: translateX(3px); }
}
.way:focus-visible::after { transform: none; }
.way-go span[aria-hidden] { transition: transform .35s var(--ease-out); }

/* ─── Assistant ─── */
#assistant { max-width: 780px; padding-top: clamp(3rem, 8vw, 5.5rem); }
.assist-title { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 700; letter-spacing: -0.035em; line-height: 1.05; margin-bottom: .5rem; }
.assist-sub { color: var(--dim); margin-bottom: 1.5rem; }

.choice {
    background: var(--bg-2);
    border-radius: 1.5rem;
    padding: 1.6rem 1.6rem 1.7rem;
    margin-bottom: .75rem;
}
.choice-head { display: flex; align-items: center; gap: .7rem; flex-wrap: wrap; margin-bottom: .5rem; }
.choice h3 { font-size: 1.35rem; letter-spacing: -0.025em; }
.choice > p { color: var(--fg); font-size: 1.02rem; }
.badge {
    font-size: .78rem;
    font-weight: 700;
    padding: .22rem .6rem;
    border-radius: 999px;
    background: var(--accent);
    color: var(--on-accent);
}
.badge.beta { background: var(--bg-3); color: var(--fg); }

.brand-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.brand-btn {
    font: inherit;
    font-weight: 700;
    padding: .75rem 1.2rem;
    border-radius: 999px;
    border: 0;
    background: var(--bg-3);
    color: var(--fg);
    cursor: pointer;
    transition: background .2s ease, transform .3s var(--ease-out);
}
.brand-btn:hover { transform: translateY(-1px); }
.brand-btn.active { background: var(--accent); color: var(--on-accent); }
.brand-openai, .brand-anthropic { font-size: 1.05rem; padding: .85rem 1.45rem; }

.paste, .fields { margin-top: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.paste label, .fields label { font-size: .9rem; font-weight: 600; color: var(--dim); }
.step { font-size: .98rem; margin-bottom: .25rem; }
.paste input, .fields input, .paste select, .fields select {
    width: 100%;
    font: inherit;
    padding: .85rem 1rem;
    border-radius: 14px;
    border: 0;
    background: var(--bg-3);
    color: var(--fg);
    outline: none;
}
.paste input:focus, .fields input:focus, .paste select:focus, .fields select:focus { box-shadow: 0 0 0 2px var(--accent-ink, var(--fg)); }

.status { font-size: .98rem; margin-top: .5rem; min-height: 1.4em; color: var(--fg); }
.status.ok { color: var(--ok); font-weight: 600; }
.status.ko {
    color: var(--fg);
    background: color-mix(in srgb, var(--ko) 12%, transparent);
    border-radius: 12px;
    padding: .7rem .9rem;
}
.actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: .9rem; }

#assistant, .choice { scroll-margin-top: 7rem; }
.choice.focus { box-shadow: 0 0 0 3px var(--accent-ink, var(--fg)); }
#assistant.rv { opacity: 1; transform: none; }

/* ─── Promesse : une bande pleine largeur dans la couleur d'accent ─── */
.promise { background: var(--accent); color: var(--on-accent); }
.promise-in { max-width: var(--max); margin: 0 auto; padding: clamp(3.5rem, 9vw, 7.5rem) var(--gutter); }
.promise-big {
    font-size: clamp(2.4rem, 7.4vw, 6.6rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: .95;
    max-width: 14ch;
}
.promise-big span { display: block; }
.promise-sub { margin-top: clamp(1.5rem, 3vw, 2.5rem); max-width: 40rem; font-size: 1.1rem; font-weight: 500; }
.promise-sub a { font-weight: 700; text-underline-offset: .25em; white-space: nowrap; }

/* ─── Pied ─── */
.foot {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: 2rem var(--gutter) 2.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem 2rem;
    font-size: .98rem;
}
.foot-brand { font-weight: 800; letter-spacing: -0.03em; }
.foot-links { display: flex; flex-wrap: wrap; gap: .4rem 1.4rem; }
.foot-links a { text-decoration: none; }
.foot-links a:hover { text-decoration: underline; text-underline-offset: .3em; }

/* Sur un très grand écran, le vide va sous le pied, pas au milieu de la page. */
body.page-home { display: block; }

/* Sur l'accueil, « Aller au chat » est déjà sous le titre : la barre n'en a pas besoin. */
@media (min-width: 769px) { body.page-home nav.nav > .nav-controls > .nav-cta { display: none !important; } }

/* ─── Mouvement : la balle tombe, rebondit, se pose. Un clic : elle part, et revient. ─── */
@media (prefers-reduced-motion: no-preference) {
    .hero-name .ball.drop { animation: ball-drop 1.25s .35s both; }
    .hero-name .ball.fetch { animation: ball-fetch 1.9s both; }
    .hero-tagline, .hero-side { animation: rise .9s var(--ease-out) both; }
    .hero-tagline { animation-delay: .15s; }
    .hero-side { animation-delay: .28s; }
}
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes ball-drop {
    0%   { opacity: 0; transform: translateY(-2.6em); animation-timing-function: cubic-bezier(.55, 0, 1, .45); }
    8%   { opacity: 1; }
    40%  { transform: translateY(0) scale(1.22, .78); animation-timing-function: cubic-bezier(0, .55, .45, 1); }
    60%  { transform: translateY(-.62em) scale(.96, 1.04); animation-timing-function: cubic-bezier(.55, 0, 1, .45); }
    76%  { transform: translateY(0) scale(1.12, .88); animation-timing-function: cubic-bezier(0, .55, .45, 1); }
    87%  { transform: translateY(-.16em); animation-timing-function: cubic-bezier(.55, 0, 1, .45); }
    95%  { transform: translateY(0) scale(1.04, .96); }
    100% { opacity: 1; transform: none; }
}
@keyframes ball-fetch {
    0%   { transform: none; animation-timing-function: cubic-bezier(.3, .6, .4, 1); }
    8%   { transform: translateY(.04em) scale(1.15, .85); animation-timing-function: cubic-bezier(.2, .8, .4, 1); }
    38%  { transform: translate(6em, -3.2em) rotate(540deg); opacity: 1; animation-timing-function: cubic-bezier(.6, 0, 1, .6); }
    46%  { transform: translate(9em, 0) rotate(720deg); opacity: 0; }
    54%  { transform: translate(5em, 0) rotate(720deg); opacity: 0; animation-timing-function: cubic-bezier(.16, 1, .3, 1); }
    60%  { opacity: 1; }
    100% { transform: none; opacity: 1; }
}

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; align-items: start; gap: 1.5rem; }
    .hero-tagline { max-width: 14ch; }
    .ways-grid { grid-template-columns: 1fr; }
    .way { min-height: 0; padding: 1.4rem 1.3rem 1.25rem; }
    .way-go { margin-top: .6rem; }
}
@media (max-width: 600px) {
    .hero { padding-top: 1rem; }
    .btn-big { width: 100%; }
    .hero-actions { gap: 1rem; }
    .link-go { width: 100%; text-align: center; padding: .4rem 0; }
    .choice { padding: 1.2rem 1.1rem 1.3rem; }
    .brand-btn { flex: 1 1 calc(50% - .5rem); text-align: center; }
    .foot { flex-direction: column; }
}