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button{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);border-radius:var(--radius);background:#fff;cursor:pointer;transition:border-color var(--transition),background var(--transition)}.stepper-control button:hover{border-color:var(--accent-dark);background:var(--accent-soft)}.stepper-control span{width:42px;text-align:center;font-weight:720}.settings-ratio-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.ratio-value{white-space:nowrap;font-size:.92rem}.ratio-control{display:grid;grid-template-columns:32px minmax(140px,1fr) 32px;gap:12px;align-items:center}.ratio-control button{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);border-radius:var(--radius);background:#fff;cursor:pointer;transition:border-color var(--transition),background var(--transition)}.ratio-control button:hover{border-color:var(--accent-dark);background:var(--accent-soft)}.ratio-control input[type=range]{width:100%;accent-color:var(--accent-dark)}@media(max-width:1024px){.dashboard-shell{grid-template-columns:200px minmax(0,1fr)}.dashboard-brand{font-size:1.15rem;padding:8px 14px 16px}.dashboard-nav-item{padding:11px 14px 11px 11px;font-size:.86rem}.dashboard-main{padding:20px}.learner-shell{max-width:100%}}@media(max-width:760px){.app-shell{padding:12px 8px 24px}.learner-shell{padding:16px 8px 28px}.auth-shell{min-height:auto;padding:12px 0 24px}.auth-card{width:min(100vw - 16px,100vw);padding:18px 16px;border-radius:14px}.home-screen{padding-top:2vh}.dashboard-shell{grid-template-columns:1fr;height:auto;min-height:100vh;border-radius:0;border:0}.dashboard-nav{position:static;height:auto;overflow-y:visible;border-right:0;border-bottom:1px solid var(--line);border-radius:0;padding:10px 8px;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:auto auto;align-items:stretch}.dashboard-brand{grid-column:1 / -1;border-bottom:0;padding:0 0 8px;font-size:1.1rem}.dashboard-nav-item{justify-content:center;border-left:0;border-bottom:3px solid transparent;padding:10px 6px;font-size:.82rem;min-height:44px}.dashboard-nav-item.active{border-bottom-color:var(--accent-dark);border-left-color:transparent}.dashboard-sidebar-bottom{display:none}.dashboard-main{padding:14px 10px;overflow-y:visible}.dashboard-header,.settings-row,.settings-ratio-head{display:grid}.kpi-grid,.cefr-level-grid,.study-action-grid,.daily-session-grid,.speaking-actions{grid-template-columns:1fr}.session-card-head,.speaking-card-head{display:grid}.session-source{white-space:normal}.practice-calendar-panel{padding:16px}.practice-calendar-grid{gap:6px}.practice-calendar-day-tile{min-height:36px;border-radius:8px}.speaking-sentence{font-size:1.25rem}.home-copy h1{max-width:100%}.study-card{padding:18px;min-height:340px}.study-chat-shell{gap:14px;padding-bottom:calc(214px + env(safe-area-inset-bottom,0px))}.study-chat-header{display:grid}.study-page-search{top:42px;left:calc(50% + 28px);width:calc(100vw - 88px)}.dictionary-structure-page{padding:72px 16px 36px}.study-chat-panel-body{padding:0 14px}.study-chat-dock{width:calc(100vw - 16px);padding:12px 22px calc(16px + env(safe-area-inset-bottom,0px));gap:12px}.learner-page{padding:72px 16px 36px}.learner-page:has(.study-page-search){padding-top:96px}.learner-back-button{top:10px;left:8px;width:46px;height:46px}.learner-back-button svg{width:22px;height:22px}.learner-progress-bar{top:12px;width:280px;gap:10px}.learner-progress-count{left:calc(100% + 8px);right:auto;font-size:.8rem;padding:1px 7px}.learner-progress-track{height:10px}.learner-header h1{font-size:clamp(2.5rem,10vw,4rem)}}