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rgb(31 20 51 / 62%);--surface-glass-soft: rgb(31 20 51 / 55%);--field-bg: rgb(31 20 51 / 78%);--backdrop: rgb(8 4 14 / 60%);--backdrop-strong: rgb(8 4 14 / 66%);--brand-mark-bg: #2e2049;--line: #33244d;--line-soft: rgb(51 36 77 / 70%);--line-mid: #3f2e5c;--line-dashed: #4e3b70;--line-field: #7a64a3;--line-field-hover: #8f7bb8;--line-strong: #7a64a3;--line-focus: #a88cf0;--scrollbar: #453462;--ink-tint-weak: rgb(245 239 230 / 8%);--ink-tint: rgb(245 239 230 / 12%);--ink-tint-strong: rgb(245 239 230 / 16%);--forest: #b49bff;--forest-light: #c7b4ff;--sage: #9b84dc;--sage-soft: #2e2049;--sage-line: #3f2d63;--sage-line-strong: #553e80;--sage-ink: #cfc0ff;--sage-tint: rgb(180 155 255 / 10%);--sage-glow: rgb(180 155 255 / 14%);--terracotta: #ff8a9c;--terracotta-soft: #3b1f2a;--terracotta-pale: #43242f;--terracotta-line: #5e3341;--terracotta-ink: #ffa9b7;--terracotta-ink-strong: #ffc0ca;--terracotta-glow: rgb(255 138 156 / 20%);--danger: #ff8a7a;--danger-hover: #ffa294;--danger-soft: 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button.active{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px var(--shadow-tint)}.provider-grid{display:grid;gap:.5rem;margin-top:.5rem}.provider-button{display:flex;align-items:center;gap:.75rem;width:100%;padding:.65rem .9rem;border:1px solid var(--line-field);border-radius:.75rem;background:var(--surface);color:var(--ink);font:inherit;font-size:.92rem;text-align:left;cursor:pointer;transition:border-color .12s ease,background .12s ease}.provider-button:not(:disabled):hover{border-color:var(--line-field-hover);background:var(--surface-raised)}.provider-button:disabled{opacity:.6;cursor:default}.provider-icon{display:inline-flex;align-items:center;justify-content:center;width:1.75rem;height:1.75rem;border-radius:.5rem;background:var(--ink-tint);color:var(--ink);font-weight:700;font-size:.85rem}.provider-google .provider-icon{background:var(--danger-soft);color:var(--danger-ink)}.provider-facebook .provider-icon,.provider-microsoft 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