.ds-app-bar{display:flex;align-items:center;gap:calc(8px * var(--tier-density));padding:calc(12px * var(--tier-density)) calc(16px * var(--tier-density));background-color:var(--md-sys-color-surface);color:var(--md-sys-color-on-surface);border-bottom:1px solid var(--md-sys-color-outline-variant);box-shadow:none}.ds-app-bar__title{flex:1 1;font-weight:600}.ds-app-bar__actions,.ds-app-bar__leading{display:flex;align-items:center;gap:calc(4px * var(--tier-density))}.ds-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--shape-corner-control);padding:calc(10px * var(--tier-density)) calc(20px * var(--tier-density));font:inherit;font-weight:600;cursor:pointer;border:1px solid transparent;transition:background-color .15s ease}.ds-button:disabled{cursor:not-allowed;opacity:.38}.ds-button:focus,.ds-button:focus-visible{outline:2px solid var(--md-sys-color-primary);outline-offset:2px}.ds-button--filled{background-color:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary)}.ds-button--filled:hover:not(:disabled){filter:brightness(.95)}.ds-button--tonal{background-color:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.ds-button--outlined{border-color:var(--md-sys-color-outline)}.ds-button--outlined,.ds-button--text{background-color:transparent;color:var(--md-sys-color-primary)}.ds-button--outlined:active:not(:disabled),.ds-button--text:active:not(:disabled){background-color:var(--md-sys-color-surface-container)}.ds-chip{display:inline-flex;align-items:center;gap:calc(4px * var(--tier-density));border-radius:var(--shape-corner-pill);padding:calc(6px * var(--tier-density)) calc(12px * var(--tier-density));font:inherit;border:none;cursor:default;background-color:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface)}.ds-chip__select,button.ds-chip{cursor:pointer}.ds-chip__select{display:inline-flex;align-items:center;gap:calc(4px * var(--tier-density));border:none;background:transparent;color:inherit;font:inherit;padding:0;cursor:pointer}.ds-chip--selected,.ds-chip:has(.ds-chip__select):has([aria-pressed=true]){background-color:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.ds-chip__remove{border:none;background:transparent;color:inherit;cursor:pointer;line-height:1;padding:0 2px}.ds-chip:focus,.ds-chip:focus-visible,.ds-chip__remove:focus,.ds-chip__remove:focus-visible,.ds-chip__select:focus,.ds-chip__select:focus-visible{outline:2px solid var(--md-sys-color-primary);outline-offset:2px}.ds-card{background-color:var(--md-sys-color-surface-container-low);color:var(--md-sys-color-on-surface);border-radius:var(--shape-corner-card);box-shadow:none}.ds-card--padding-default{padding:calc(16px * var(--tier-density))}.ds-card--padding-compact{padding:calc(8px * var(--tier-density))}.ds-lesson-list-item{display:flex;align-items:center;gap:calc(8px * var(--tier-density));padding:calc(8px * var(--tier-density)) 0;color:var(--md-sys-color-on-surface)}.ds-lesson-list-item__icon{display:inline-flex;align-items:center;justify-content:center;width:1.5em;color:var(--md-sys-color-on-surface-variant)}.ds-lesson-list-item__icon--completed{color:var(--md-sys-color-on-success-container)}.ds-lesson-list-item--current .ds-lesson-list-item__status,.ds-lesson-list-item__icon--current{color:var(--md-sys-color-primary)}.ds-lesson-list-item__title{flex:1 1}.ds-lesson-list-item__status{color:var(--md-sys-color-on-surface-variant);font-size:calc(12px * var(--tier-type-scale, 1))}.ds-lesson-list-item--completed .ds-lesson-list-item__status{color:var(--md-sys-color-on-success-container)}.ds-lesson-list-item__minutes{color:var(--md-sys-color-on-surface-variant);font-size:calc(12px * var(--tier-type-scale, 1))}.ds-metric-card{display:flex;flex-direction:column;gap:calc(4px * var(--tier-density))}.ds-metric-card__label{color:var(--md-sys-color-on-surface-variant);font-size:calc(12px * var(--tier-type-scale, 1))}.ds-metric-card__value{color:var(--md-sys-color-on-surface);font-size:calc(24px * var(--tier-type-scale, 1));font-weight:600}.ds-metric-card__supporting-text{color:var(--md-sys-color-on-surface-variant);font-size:calc(12px * var(--tier-type-scale, 1))}.ds-skeleton{display:block;background-color:var(--md-sys-color-surface-container)}.ds-skeleton--text{border-radius:var(--shape-corner-control)}.ds-skeleton--card{border-radius:var(--shape-corner-card);background-color:var(--md-sys-color-surface-container-high)}.ds-skeleton--ring{border-radius:50%}.ds-text-field{display:flex;flex-direction:column;gap:4px}.ds-text-field__label{font:inherit;font-weight:600;color:var(--md-sys-color-on-surface)}.ds-text-field__input{font:inherit;padding:calc(10px * var(--tier-density)) calc(14px * var(--tier-density));border-radius:var(--shape-corner-control);border:1px solid var(--md-sys-color-outline);background-color:var(--md-sys-color-surface);color:var(--md-sys-color-on-surface)}.ds-text-field__input::placeholder{color:var(--md-sys-color-on-surface-variant)}.ds-text-field__input:disabled{cursor:not-allowed;opacity:.38}.ds-text-field__input:focus,.ds-text-field__input:focus-visible{outline:2px solid var(--md-sys-color-primary);outline-offset:2px}.ds-text-field__input[aria-invalid=true]{border-color:var(--md-sys-color-error)}.ds-text-field__error{display:flex;align-items:center;gap:6px;margin:0;color:var(--md-sys-color-error);font-size:.875rem}.ds-text-field__error-icon{font-weight:700}.ds-step-indicator__list{display:flex;align-items:center;gap:calc(16px * var(--tier-density));list-style:none;margin:0;padding:0}.ds-step-indicator__item{display:inline-flex;align-items:center;gap:calc(6px * var(--tier-density));color:var(--md-sys-color-on-surface-variant)}.ds-step-indicator__item--current{color:var(--md-sys-color-on-surface);font-weight:600}.ds-step-indicator__item--complete{color:var(--md-sys-color-primary)}.ds-step-indicator__icon{display:inline-flex;align-items:center;justify-content:center;width:calc(20px * var(--tier-density));height:calc(20px * var(--tier-density));border-radius:var(--shape-corner-pill);font-size:.75em;line-height:1}.ds-step-indicator__icon--complete{background-color:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary)}.ds-step-indicator__icon--current{border:2px solid var(--md-sys-color-primary);color:var(--md-sys-color-primary)}.ds-step-indicator__icon--upcoming{border:2px solid var(--md-sys-color-outline-variant);color:var(--md-sys-color-on-surface-variant)}.ds-step-indicator__label{font-size:.875em}.ds-linear-progress{display:flex;align-items:center;gap:calc(8px * var(--tier-density))}.ds-linear-progress__track{position:relative;flex:1 1 auto;height:6px;border-radius:var(--shape-corner-pill);background-color:var(--md-sys-color-surface-variant);overflow:hidden}.ds-linear-progress__fill{height:100%;background-color:var(--md-sys-color-tertiary);border-radius:var(--shape-corner-pill);transition:width .2s ease}.ds-linear-progress__label{color:var(--md-sys-color-on-surface-variant);font-size:.875em}.ds-linear-progress__value{color:var(--md-sys-color-on-surface);font-size:.875em;font-weight:600}.ds-streak-indicator{display:inline-flex;align-items:center;gap:calc(4px * var(--tier-density))}.ds-streak-indicator__icon{color:var(--md-sys-color-tertiary);font-size:1em;line-height:1}.ds-streak-indicator__count{color:var(--md-sys-color-on-surface);font-size:.875em;font-weight:600}