.method-dialog { width: min(940px, calc(100% - 28px)); max-height: calc(100dvh - 32px); margin: auto; padding: 0; border: 1px solid var(--theme-line); border-radius: 24px; color: var(--theme-ink); background: var(--theme-panel); box-shadow: 0 32px 120px #0009; }
.method-dialog::backdrop { background: #020617b8; backdrop-filter: blur(6px); }
.method-dialog *, .method-dialog *::before, .method-dialog *::after { box-sizing: border-box; }
.method-dialog button, .method-dialog select { font: inherit; }
.method-dialog button, .method-link, .topic-select { cursor: pointer; }
.method-dialog :focus-visible, .method-link:focus-visible, .topic-select:focus-visible { outline: 3px solid var(--theme-accent-light); outline-offset: 4px; }
.method-dialog-header { position: sticky; top: 0; z-index: 2; background: var(--theme-panel); display: flex; align-items: start; justify-content: space-between; gap: 20px; padding: 24px 28px 20px; border-bottom: 1px solid var(--theme-line); }
.method-eyebrow { color: var(--theme-accent-light); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 8px; }
.method-dialog h2 { margin: 0; font-size: clamp(22px, 4vw, 30px); font-weight: 800; line-height: 1.25; }
.method-close { flex-shrink: 0; width: 40px; height: 40px; border: 1px solid var(--theme-line); border-radius: 12px; background: var(--theme-control); color: var(--theme-ink); font-size: 24px !important; }
.method-dialog-body { padding: 24px 28px; }
.method-picker { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; color: var(--theme-muted); font-size: 13px; }
.method-picker select { flex: 1; min-width: 0; max-width: 100%; background: var(--theme-control); color: var(--theme-ink); border: 1px solid var(--theme-line); border-radius: 10px; padding: 10px; }
.method-intro { display: grid; grid-template-columns: 1fr 1.4fr; gap: 24px; margin-bottom: 22px; }
.method-dialog h3 { margin: 0 0 8px; font-size: 16px; font-weight: 800; }
.method-dialog p { line-height: 1.65; }
.method-intro p, .method-notation { margin: 0; color: var(--theme-muted); font-size: 14px; }
.method-formula { background: var(--theme-card); border: 1px solid var(--theme-line); border-left: 3px solid var(--theme-accent); border-radius: 12px; padding: 16px 20px; margin-bottom: 26px; }
.method-formula strong { display: block; font-family: 'JetBrains Mono', monospace; font-size: 15px; line-height: 1.8; overflow-wrap: anywhere; }
.method-formula .method-notation { margin-top: 6px; font-size: 12px; }
.method-examples { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 18px; }
.method-example { min-height: 44px; padding: 10px 16px; border: 1px solid var(--theme-line); border-radius: 12px; color: var(--theme-muted); background: transparent; font-weight: 700 !important; }
.method-example[aria-pressed="true"] { background: var(--theme-control); border-color: var(--theme-accent); color: var(--theme-accent-light); }
.method-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.method-step { display: flex; gap: 14px; padding: 16px; border: 1px solid var(--theme-line); border-radius: 14px; background: var(--theme-card); }
.method-step-number { width: 28px; height: 28px; flex-shrink: 0; display: grid; place-items: center; border-radius: 50%; background: var(--theme-control); color: var(--theme-accent-light); font-size: 12px; font-weight: 800; }
.method-step-content { min-width: 0; }
.method-step h4 { margin: 2px 0 8px; font-size: 14px; font-weight: 700; }
.method-calculation { font-family: 'JetBrains Mono', monospace; font-weight: 700; line-height: 1.6; font-size: clamp(14px, 2.5vw, 18px); overflow-wrap: anywhere; }
.method-step p { margin: 6px 0 0; color: var(--theme-muted); font-size: 13px; }
.method-answer { display: flex; flex-wrap: wrap; gap: 10px 20px; align-items: center; justify-content: space-between; margin-top: 14px; padding: 18px 20px; border: 1px solid var(--theme-accent); border-radius: 14px; background: var(--theme-card); }
.method-answer span { font-size: 12px; color: var(--theme-muted); }
.method-answer strong { font-family: 'JetBrains Mono', monospace; color: var(--theme-accent-light); font-size: clamp(18px, 3.5vw, 24px); overflow-wrap: anywhere; }
.method-caution { margin: 22px 0 0; padding: 16px 18px; border-left: 3px solid #fbbf24; background: var(--theme-card); border-radius: 0 12px 12px 0; font-size: 13px; color: var(--theme-muted); }
.method-caution strong { color: var(--theme-ink); }
.method-dialog-footer { padding: 18px 28px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; border-top: 1px solid var(--theme-line); }
.method-dialog-footer p { margin: 0; font-size: 12px; color: var(--theme-muted); }
.method-primary { padding: 12px 20px; min-height: 44px; border-radius: 12px; border: 0; color: #082f49; background: var(--theme-accent-light); font-weight: 800 !important; }
.method-link { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; width: 100%; border: 0; border-top: 1px solid var(--theme-line); background: transparent; color: var(--theme-accent-light); font-size: 12px; font-weight: 700; padding: 10px; }
.method-link:hover { background: #ffffff08; }
.topic-select { display: block; text-align: left; width: 100%; padding: 16px; background: transparent; border: 0; border-radius: 16px 16px 0 0; }
.method-entry { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; padding: 22px 24px; border: 1px solid var(--theme-line); border-radius: 20px; background: var(--theme-card); color: var(--theme-ink); text-align: left; margin-bottom: 24px; cursor: pointer; }
.method-entry strong { display: block; font-size: 17px; }
.method-entry small { display: block; color: var(--theme-muted); font-size: 12px; margin-top: 6px; line-height: 1.6; }
.method-entry > span:last-child { font-size: 24px; color: var(--theme-accent-light); }
.math-training { padding-top: 76px !important; padding-bottom: 104px !important; }
.math-problem { font-size: clamp(36px, 10vw, 60px) !important; }
.math-lobby { padding-top: 76px !important; }
body:has(.method-dialog[open]) .floating-enroll-btn { visibility: hidden; }
@media (max-width: 640px) {
    .method-dialog { width: calc(100% - 16px); max-height: calc(100dvh - 16px); border-radius: 18px; }
    .method-dialog-header, .method-dialog-body, .method-dialog-footer { padding: 18px; }
    .method-dialog-header { gap: 12px; }
    .method-intro { grid-template-columns: 1fr; gap: 18px; }
    .method-picker { align-items: stretch; flex-direction: column; gap: 6px; }
    .method-example { flex: 1; padding: 10px; font-size: 13px !important; }
    .method-step { gap: 10px; padding: 12px; }
    .method-step-number { width: 24px; height: 24px; }
    .method-answer { padding: 14px; }
    .method-dialog-footer .method-primary { width: 100%; }
    .math-start { bottom: 88px !important; }
    .math-lobby > div:first-child { flex-wrap: wrap; gap: 20px; }
}
@media (prefers-reduced-motion: reduce) {
    .math-lobby *, .math-training * { animation: none !important; transition: none !important; }
}