.guided-one-step { min-height: 0; }
.guided-one-step .solving-body {
    flex: 0 0 auto;
    padding-bottom: 0;
    overflow: visible;
}
.guided-one-step .solving-footer {
    position: static;
    margin-top: 0;
    padding: 0 20px 32px;
}
.guided-one-step .equation-display { display: grid; gap: 8px; }
.guided-one-step .one-step-work-display {
    display: grid;
    gap: 2px;
    width: 100%;
    margin: 0;
    color: #e2e8f0;
    font: 600 clamp(16px, 4.5vw, 22px) 'Courier New', monospace;
    letter-spacing: 0;
}
.guided-one-step .one-step-work-display .guided-work-equation {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 1ch minmax(0, 2fr);
}
.guided-one-step .one-step-work-display .guided-work-operation-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 1ch minmax(0, 1fr);
}
.guided-one-step .one-step-work-display .one-step-pending-term {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) 1ch minmax(0, 2fr);
}
.guided-one-step .one-step-work-display .one-step-pending-constant {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr) 1ch minmax(0, 2fr);
}
.guided-one-step .one-step-work-display .variable { color: #667eea; }
.guided-one-step .one-step-work-current .guided-work-right {
    display: flex;
    justify-content: center;
    min-width: 0;
}
.guided-one-step .guided-work-current-input-slot { display: block; width: 100%; }
.guided-one-step .guided-work-current-input-slot .guided-answer-row {
    width: 100%;
    gap: 4px;
}
.guided-one-step .guided-work-current-input-slot input {
    flex: 1 1 0;
    min-width: 0;
    width: 0;
    padding: 6px;
    font-size: clamp(16px, 4vw, 22px);
}
.guided-one-step .guided-work-current-input-slot .key-btn {
    flex: 0 0 36px;
    min-width: 36px;
    min-height: 40px;
    padding: 4px;
}
@media (max-width: 360px) {
    .guided-one-step .operator-buttons { grid-template-columns: repeat(2, 1fr); }
    .guided-one-step .one-step-work-display { font-size: 16px; }
    .guided-one-step .one-step-work-display .guided-work-equation { gap: 1px; }
}
.guided-one-step [hidden] { display: none !important; }
.guided-one-step #lesson-progress { color: #a0aec0; font-size: 14px; }
.guided-one-step .equation-text { overflow-wrap: anywhere; }
.guided-one-step #guided-answer-form { display: grid; gap: 12px; color: #e2e8f0; }
.guided-answer-row { display: flex; gap: 10px; }
.guided-answer-row input {
    width: 100%; min-width: 0; padding: 12px 16px; border: 2px solid #667eea;
    border-radius: 12px; background: #1a202c; color: #fff; font-size: 24px;
}
.guided-one-step .success-btn { width: 100%; text-align: center; text-decoration: none; display: block; }
.guided-one-step #guided-next { margin-top: 16px; }
.guided-one-step-navigation {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px 12px;
    align-items: center;
    margin-top: 16px;
    color: #cbd5e0;
}
.guided-one-step-navigation label { grid-column: 2; grid-row: 1; }
.guided-one-step-navigation button,
.guided-one-step-navigation select {
    min-width: 0;
    min-height: 44px;
    border: 1px solid #4a5568;
    border-radius: 8px;
    background: #2d3748;
    color: #fff;
    padding: 8px 10px;
    font: inherit;
}
.guided-one-step-navigation select { grid-column: 2; }
.guided-one-step-navigation button { grid-column: 1; grid-row: 1 / span 2; }
.guided-results { color: #e2e8f0; text-align: center; }
.guided-percentage { color: #68d391; font-size: 36px; font-weight: 700; }
.guided-calculator { margin-top: 12px; }
.guided-calculator summary { color: #cbd5e0; cursor: pointer; padding: 10px 0; font-size: 14px; }
.guided-calculator-panel { padding: 12px; border: 1px solid #4a5568; border-radius: 12px; }
.guided-calculator .keypad-display { display: block; overflow-wrap: anywhere; }
.guided-calculator-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.guided-calculator-grid .key-btn { padding: 10px 4px; font-size: 18px; min-height: 44px; }
.guided-calculator-grid [data-calculator-key="="] { grid-column: span 2; background: #276749; }
.guided-one-step button:focus-visible, .guided-one-step summary:focus-visible,
.guided-one-step a:focus-visible { outline: 3px solid #f6e05e; outline-offset: 3px; }