* { box-sizing: border-box; }
:root { color-scheme: light; --page-bg: #f6f4ee; --page-text: #292922; --page-dim: #646257; --page-faint: #767267; --page-border: #dcd7ca; --page-card: #fffdf8; --page-accent: #a65338; }
:root[data-theme="dark"] { color-scheme: dark; --page-bg: #262624; --page-text: #f4f3ee; --page-dim: #c0bdb3; --page-faint: #aaa69b; --page-border: #555246; --page-card: #30302e; --page-accent: #e49a79; }
body { margin: 0; background: var(--page-bg); color: var(--page-text); font-family: system-ui, sans-serif; }
a { color: inherit; }
.site-header, main, footer { width: min(1200px, calc(100% - 48px)); margin: auto; }
.site-header { display: flex; justify-content: space-between; align-items: center; padding: 25px 0; border-bottom: 1px solid var(--page-border); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 750; font-size: 22px; }
.brand img { width: 40px; height: 40px; aspect-ratio: 1; flex-shrink: 0; border-radius: 50%; object-fit: cover; }
.login-link { border: 1px solid var(--page-border); border-radius: 30px; padding: 11px 22px; text-decoration: none; }
.hero { padding: 85px 0 70px; max-width: 850px; }
.eyebrow { font-size: 11px; letter-spacing: 2px; font-weight: 700; color: var(--page-accent); }
h1 { font-family: Georgia, serif; font-weight: 400; font-size: clamp(38px, 5.5vw, 68px); line-height: 1.09; letter-spacing: -2px; margin: 22px 0; }
h1 span { color: var(--brand-accent-text); }
.hero > p:not(.eyebrow) { font-size: 18px; color: var(--page-dim); max-width: 600px; line-height: 1.7; }
.trial-link { display: inline-block; font-size: 14px; margin-top: 18px; text-underline-offset: 5px; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 12px; margin-bottom: 25px; }
.section-heading h2 { font-size: 22px; margin: 0; }
.section-heading span { color: var(--page-faint); font-size: 13px; }
.plans-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.plan { position: relative; display: flex; flex-direction: column; padding: 30px 24px; border: 1px solid var(--page-border); border-radius: 18px; background: var(--page-card); }
.plan.featured { background: #292c27; color: #fffdf5; border-color: #292c27; }
.plan-tag { font-size: 10px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--page-faint); min-height: 20px; }
.featured .plan-tag { color: #e5a387; }
.plan h3 { font-size: 22px; margin: 12px 0 8px; }
.plan-price { font-size: 34px; font-weight: 650; white-space: nowrap; margin: 20px 0 3px; letter-spacing: -1px; }
.plan-unit { color: var(--page-faint); font-size: 12px; margin-bottom: 25px; }
.featured .plan-unit { color: #c4c3b8; }
.plan-credits { font-size: 16px; font-weight: 650; padding-top: 20px; border-top: 1px solid var(--page-border); }
.plan p { font-size: 13px; line-height: 1.7; }
.plan a { margin-top: auto; display: block; padding: 13px 10px; text-align: center; border-radius: 8px; text-decoration: none; font-size: 13px; font-weight: 650; border: 1px solid var(--page-border); }
.featured a { background: #e49a79; color: #27251f; border: 0; }
.plan a:hover, .login-link:hover { filter: brightness(.94); }
a:focus-visible, button:focus-visible { outline: 3px solid #b76241; outline-offset: 4px; }
.how-it-works { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; padding: 70px 0; margin-top: 70px; border-top: 1px solid var(--page-border); }
.how-it-works h2 { font-family: Georgia, serif; font-size: 36px; font-weight: 400; line-height: 1.2; }
.explanations { display: grid; gap: 24px; }
.explanations h3 { font-size: 16px; margin: 0 0 9px; }
.explanations p { color: var(--page-dim); font-size: 14px; line-height: 1.8; margin: 0; }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 15px; font-size: 12px; color: var(--page-faint); border-top: 1px solid var(--page-border); padding: 28px 0; }
@media (max-width: 1000px) { .plans-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .site-header, main, footer { width: calc(100% - 32px); } .hero { padding: 50px 0; } .plans-grid { grid-template-columns: 1fr; } .how-it-works { grid-template-columns: 1fr; gap: 20px; margin-top: 45px; padding: 45px 0; } .plan { padding: 24px; } }

.header-actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle { font: inherit; color: var(--page-text); background: transparent; border: 1px solid var(--page-border); border-radius: 30px; padding: 11px 15px; cursor: pointer; font-size: 12px; }
@media (max-width: 600px) { .brand { font-size: 18px; gap: 6px; } .brand img { width: 30px; height: 30px; } .header-actions { gap: 6px; } .theme-toggle, .login-link { padding: 9px 10px; font-size: 11px; } }

/* Language controls share the active colour scheme and remain usable on mobile. */
.locale-picker { display: flex; align-items: center; gap: .6rem; font-size: .85rem; }
.locale-picker select { min-width: 0; max-width: 100%; padding: .45rem .6rem; border: 1px solid var(--page-border, var(--border, #999)); border-radius: 8px; background: var(--page-card, var(--bg, #fff)); color: var(--page-text, var(--text, #222)); font: inherit; }
.auth-card .locale-picker { justify-content: center; margin: .8rem 0; }
@media (max-width: 600px) { .header-actions { flex-wrap: wrap; justify-content: flex-end; } .site-header { gap: .6rem; } .locale-picker { flex-wrap: wrap; } }

.chat-models-section { margin-top: 72px; padding-top: 48px; border-top: 1px solid var(--page-border); }
.chat-models-intro { color: var(--page-dim); max-width: 720px; font-size: 15px; line-height: 1.8; margin: 0 0 28px; }
.chat-models-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.chat-model-card { display: flex; flex-direction: column; padding: 26px 22px; border: 1px solid var(--page-border); border-radius: 16px; background: var(--page-card); }
.chat-model-tag { font-size: 11px; color: var(--page-accent); letter-spacing: .3px; }
.chat-model-card h3 { font-size: 20px; margin: 16px 0 4px; line-height: 1.3; }
.chat-model-card p { color: var(--page-dim); font-size: 14px; line-height: 1.8; margin: 12px 0 22px; }
.chat-model-use { margin-top: auto; padding-top: 15px; border-top: 1px solid var(--page-border); font-size: 12px; line-height: 1.7; }
.chat-models-note { color: var(--page-faint); font-size: 13px; line-height: 1.8; margin: 20px 0 0; }
@media (max-width: 1000px) { .chat-models-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .chat-models-section { margin-top: 45px; padding-top: 32px; } .chat-models-grid { grid-template-columns: 1fr; } }