/* Shared corner system: presentation only; colours and interactions are unchanged.
   Native corner smoothing is progressive; rounded corners are the fallback.
   Source: https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/corner-shape */
:root { --ear-corner-control:14px; --ear-corner-group:18px; --ear-corner-surface:24px; }
:is(button, .button, input:not([type="checkbox"]):not([type="radio"]):not([type="range"]), select, textarea, .admin-navigation a) { border-radius:var(--ear-corner-control) !important; }
:is(article, dialog, .login-panel, .course-phase, .course-section, .course-observation, .main-stage-detail, .main-stage-card, .journey-intro, .situation-finder, .tonight-card, .mindmap, .mindmap-list button, .checkpoint, .checkpoint-reply, .scenario-question, .quiz-card, .followup-section, .coach-empty, .skill-usage-card, .answer-block, .chat-message > div, .share-post, .hi-zone-card, .share-studio, .hi-zone-share-form, .trainer-game-tile, .trainer-game-shell, .trainer-reflection, .trainer-debrief, .featured-trainer-game, .admin-kpi-card, .admin-stat-card, .admin-message, .admin-navigation, .playable-game-picker, .day-tip-action, .people-notebook section, .rs-card, .rs-panel) { border-radius:var(--ear-corner-surface) !important; }
:is(.segmented, .trainer-difficulty, .game-difficulty, .course-extra-stages, .star-balance, .starter-prompts, .chat-composer) { border-radius:var(--ear-corner-group) !important; }
/* Joined conversation surfaces keep a seamless shared edge. */
.chat-thread { border-radius:var(--ear-corner-surface) var(--ear-corner-surface) 0 0 !important; }
.chat-composer { border-radius:0 0 var(--ear-corner-surface) var(--ear-corner-surface) !important; }
@supports (corner-shape:squircle) {
  :is(button, .button, input:not([type="checkbox"]):not([type="radio"]):not([type="range"]), select, textarea, .admin-navigation a, article, dialog, .login-panel, .course-phase, .course-section, .course-observation, .main-stage-detail, .main-stage-card, .journey-intro, .situation-finder, .tonight-card, .mindmap, .mindmap-list button, .checkpoint, .checkpoint-reply, .scenario-question, .quiz-card, .followup-section, .coach-empty, .skill-usage-card, .answer-block, .chat-message > div, .share-post, .hi-zone-card, .share-studio, .hi-zone-share-form, .trainer-game-tile, .trainer-game-shell, .trainer-reflection, .trainer-debrief, .featured-trainer-game, .admin-kpi-card, .admin-stat-card, .admin-message, .admin-navigation, .playable-game-picker, .day-tip-action, .people-notebook section, .rs-card, .rs-panel, .segmented, .trainer-difficulty, .game-difficulty, .course-extra-stages, .star-balance, .starter-prompts, .chat-composer, .chat-thread) { corner-shape:squircle; }
}
/* Full-screen activity sheets meet the viewport edge. */
@media(max-width:767px) { .trainer-game-shell.is-expanded { border-radius:0 !important; } }