/* =====================================
   Tahouri Edu Platform
   Activity Selection UI

   Shared activity-button language:
   modern, touch-friendly, soft card UI.
   No legacy button/pseudo-icon styling.
   ===================================== */

#app > .screen.activityScreen:has(> .tahouri-app-header) { padding: 18px 16px 34px; }

#app > .screen.activityScreen:has(> .tahouri-app-header) #activityList {
    width: min(760px, 100%);
    margin: 24px auto 18px;
    padding: 0 8px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn {
    position: relative;
    width: 100%;
    min-height: 78px;
    padding: 15px 54px 15px 22px;
    border: 1px solid rgba(125, 145, 170, .18);
    border-radius: 22px;
    background: var(--ui-surface, #ffffff);
    color: var(--ui-text, #243247);
    font-family: inherit;
    font-size: clamp(17px, 2.5vw, 21px);
    font-weight: 750;
    line-height: 1.45;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    direction: rtl;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(45, 65, 90, .09);
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
    -webkit-tap-highlight-color: transparent;
    appearance: none;
}

/* Icons come from the button markup; never inject a generic icon with CSS. */
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupIcon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    font-size: 28px;
    line-height: 1;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn[data-id="evenOdd"]::before {
    content: "🔢";
    position: static;
    transform: none;
    font-size: 27px;
    line-height: 1;
    flex: 0 0 auto;
}

/* Navigation affordance only; it is not a Back button. */
#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn::after,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn::after {
    content: "‹";
    position: absolute;
    top: 50%;
    left: 18px;
    transform: translateY(-52%);
    color: var(--ui-muted, #7a8798);
    font-family: Arial, sans-serif;
    font-size: 30px;
    font-weight: 400;
    line-height: 1;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn:hover,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn:hover {
    transform: translateY(-2px);
    border-color: rgba(90, 120, 155, .28);
    box-shadow: 0 10px 24px rgba(45, 65, 90, .13);
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn:active,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn:active {
    transform: translateY(0) scale(.99);
    box-shadow: 0 4px 12px rgba(45, 65, 90, .10);
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn:disabled,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn:disabled {
    opacity: .68;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    background: #f5f7fa;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn:disabled::before,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn:disabled::before {
    content: "🔒";
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    font-size: 22px;
    line-height: 1;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn:focus-visible,
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn:focus-visible {
    outline: 3px solid var(--ui-focus, #7aa7d9);
    outline-offset: 3px;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupHeading {
    width: min(760px, 100%);
    margin: 10px auto 22px;
    padding: 18px 16px 4px;
    text-align: center;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupHeadingIcon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    margin-bottom: 6px;
    border-radius: 18px;
    background: rgba(255, 255, 255, .72);
    box-shadow: 0 5px 16px rgba(45, 65, 90, .08);
    font-size: 34px;
    line-height: 1;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupHeading h1 { margin: 4px 0 5px; }
#app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupHeading p {
    margin: 0;
    color: var(--ui-muted, #718096);
    font-size: 15px;
}

#app > .screen.activityScreen:has(> .tahouri-app-header) .activityEmptyMessage {
    width: min(680px, 100%);
    margin: 28px auto;
    padding: 24px 18px;
    text-align: center;
    color: var(--ui-muted, #718096);
    border: 1px dashed #d5dee9;
    border-radius: 20px;
    background: #fbfcfe;
}

/* The global header owns Back navigation. */
#app > .screen.activityScreen:has(> .tahouri-app-header) #backChaptersBtn,
#app > .screen.activityScreen:has(> .tahouri-app-header) #backToActivitiesBtn {
    display: none !important;
}

@media (max-width: 520px) {
    #app > .screen.activityScreen:has(> .tahouri-app-header) { padding: 12px 10px 26px; }
    #app > .screen.activityScreen:has(> .tahouri-app-header) #activityList {
        margin-top: 18px;
        padding: 0 2px;
        gap: 11px;
    }
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn,
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn {
        min-height: 72px;
        padding: 13px 46px 13px 18px;
        border-radius: 19px;
        gap: 7px;
        box-shadow: 0 5px 15px rgba(45, 65, 90, .08);
    }
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupIcon {
        width: 38px;
        height: 38px;
        font-size: 25px;
    }
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn[data-id="evenOdd"]::before { font-size: 24px; }
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn::after,
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn::after {
        left: 14px;
        font-size: 27px;
    }
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activitySelectBtn:disabled::before,
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupBtn:disabled::before {
        right: 11px;
        font-size: 20px;
    }
    #app > .screen.activityScreen:has(> .tahouri-app-header) .activityGroupHeading {
        margin-top: 4px;
        padding-top: 10px;
    }
}


/* Temporary lock message — replaces blocking browser alert. */
.activityLockMessageOverlay {
    position: fixed;
    inset: 0;
    z-index: 10050;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    box-sizing: border-box;
    pointer-events: none;
    opacity: 1;
    transition: opacity .22s ease;
}

.activityLockMessageOverlay.is-hiding { opacity: 0; }

.activityLockMessage {
    width: max-content;
    max-width: calc(100vw - 32px);
    box-sizing: border-box;
    padding: 8px 14px;
    border-radius: 16px;
    background: rgba(30, 30, 30, .68);
    color: #fff;
    text-align: center;
    box-shadow: 0 12px 34px rgba(0, 0, 0, .18);
    cursor: pointer;
    pointer-events: auto;
}

.activityLockIcon {
    margin-bottom: 5px;
    font-size: 25px;
    line-height: 1;
}

.activityLockText {
    white-space: pre-line;
    font-size: clamp(15px, 2.4vw, 17px);
    font-weight: 700;
    line-height: 1.8;
}

@media (prefers-reduced-motion: reduce) {
    .activityLockMessageOverlay { transition: none; }
}