:root {
    --ba-blue: #075AAA;
    --ba-navy: #01295C;
    --ba-red: #EB2226;
    --ba-cream: #EFE9E5;
    --ba-taupe: #ACA095;
    --ba-sky-blue: #B9CFED;
    --ba-grey: #A7A9AC;
    
    --ios-radius: 12px;
    --ios-radius-lg: 16px;
    --ios-radius-xl: 20px;
    --ios-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --ios-shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    --transition-normal: 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-fast: 150ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

* {
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background-color: var(--ba-cream);
    color: #1d1d1f;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.ios-card {
    background: white;
    border-radius: var(--ios-radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--ios-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-fast), color var(--transition-fast);
    cursor: pointer;
    display: block;
}

.ios-card:active {
    transform: scale(0.98);
}

/* iOS-style hidden inputs for quiz/daily question pages only */
.daily-question-page input[type="checkbox"].form-check-input,
.daily-question-page input[type="radio"].form-check-input,
.quiz-page input[type="checkbox"].form-check-input,
.quiz-page input[type="radio"].form-check-input {
    opacity: 0;
    position: absolute;
    pointer-events: none;
}

/* Keep Bootstrap default radio/checkbox styling for admin areas */
.modal input[type="checkbox"].form-check-input,
.modal input[type="radio"].form-check-input {
    opacity: 1;
    position: static;
    pointer-events: all;
}

.ios-card-lg {
    border-radius: var(--ios-radius-lg);
    padding: 24px;
}

.ios-button {
    display: inline-block;
    padding: 12px 24px;
    background: var(--ba-blue);
    color: white !important;
    border-radius: 25px;
    border: none;
    font-weight: 500;
    font-size: 16px;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    text-align: center;
}

.ios-button:active {
    transform: scale(0.96);
}

.ios-button:hover {
    background: var(--ba-navy);
    box-shadow: var(--ios-shadow-lg);
}

.ios-button-pill {
    border-radius: 50px;
    padding: 14px 32px;
    font-weight: 600;
}

.ios-button-red {
    background: var(--ba-red);
}

.ios-button-red:hover {
    background: #c41c1f;
}

.ios-nav-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
    z-index: 1000;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    transform: translate3d(0, 0, 0);
    -webkit-transform: translate3d(0, 0, 0);
}

.ios-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 4px;
    color: var(--ba-grey);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-size: 11px;
    font-weight: 500;
}

.ios-nav-item i {
    font-size: 24px;
    margin-bottom: 2px;
}

.ios-nav-item.active {
    color: var(--ba-blue);
}

.ios-nav-item:active {
    opacity: 0.6;
}

.ios-header-large {
    font-size: 34px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
    color: #1d1d1f;
}

.ios-header-subtitle {
    font-size: 16px;
    color: var(--ba-grey);
    font-weight: 400;
    margin-bottom: 24px;
}

.ios-modal-sheet {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-radius: 16px 16px 0 0;
    padding: 20px;
    padding-bottom: calc(20px + env(safe-area-inset-bottom));
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    z-index: 1100;
    max-height: 90vh;
    overflow-y: auto;
}

.ios-modal-sheet.show {
    transform: translateY(0);
}

.ios-modal-handle {
    width: 36px;
    height: 5px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 3px;
    margin: 0 auto 20px;
}

.ios-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1050;
    pointer-events: none;
}

.ios-modal-backdrop.show {
    opacity: 1;
    pointer-events: all;
}

.ios-answer-option {
    display: block;
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 12px;
    background: white;
    border: 2px solid var(--ba-sky-blue);
    border-radius: 14px;
    font-size: 16px;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: #1d1d1f;
}

.ios-answer-option:hover {
    background: var(--ba-sky-blue);
    border-color: var(--ba-blue);
}

.ios-answer-option.selected {
    background: var(--ba-blue);
    color: white;
    border-color: var(--ba-blue);
}

.ios-answer-option.correct {
    background: #34c759;
    color: white;
    border-color: #34c759;
    animation: pulse-correct 0.4s ease;
}

.ios-answer-option.incorrect {
    background: var(--ba-red);
    color: white;
    border-color: var(--ba-red);
    animation: shake 0.4s ease;
}

@keyframes pulse-correct {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

@keyframes badge-unlock {
    0% { transform: scale(0.5); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.ios-badge-unlock {
    animation: badge-unlock 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.ios-badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
    padding: 16px 0;
}

.ios-badge-card {
    background: white;
    border-radius: var(--ios-radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--ios-shadow);
    transition: transform var(--transition-normal);
}

.ios-badge-card:active {
    transform: scale(0.95);
}

.ios-badge-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 12px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    background: linear-gradient(135deg, var(--ba-blue) 0%, var(--ba-navy) 100%);
    box-shadow: 0 4px 12px rgba(7, 90, 170, 0.3);
}

.ios-badge-icon.bronze {
    background: linear-gradient(135deg, #cd7f32 0%, #b8860b 100%);
    box-shadow: 0 4px 12px rgba(205, 127, 50, 0.3);
}

.ios-badge-icon.silver {
    background: linear-gradient(135deg, #c0c0c0 0%, #808080 100%);
    box-shadow: 0 4px 12px rgba(192, 192, 192, 0.3);
}

.ios-badge-icon.gold {
    background: linear-gradient(135deg, #ffd700 0%, #b8860b 100%);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.ios-badge-icon.platinum {
    background: linear-gradient(135deg, #e5e4e2 0%, #bcc6cc 100%);
    box-shadow: 0 4px 12px rgba(229, 228, 226, 0.4);
}

.ios-segment-control {
    display: flex;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    padding: 2px;
    margin-bottom: 20px;
}

.ios-segment-item {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: #1d1d1f;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.ios-segment-item.active {
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.ios-list-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: white;
    border-radius: var(--ios-radius);
    margin-bottom: 8px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.ios-list-item:active {
    background: var(--ba-cream);
}

.ios-list-item i {
    margin-right: 12px;
    color: var(--ba-blue);
    font-size: 20px;
}

.ios-divider {
    height: 1px;
    background: rgba(0, 0, 0, 0.1);
    margin: 16px 0;
}

.haptic-feedback {
    transition: transform 50ms;
}

.haptic-feedback:active {
    transform: scale(0.95);
}

@media (hover: none) {
    .ios-card:hover {
        transform: none;
    }
}

.content-with-bottom-nav {
    padding-bottom: calc(80px + env(safe-area-inset-bottom));
}

.ios-safe-area-top {
    padding-top: env(safe-area-inset-top);
}

.slide-in-right {
    animation: slideInRight 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.slide-in-left {
    animation: slideInLeft 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.ios-status-bar {
    height: env(safe-area-inset-top);
    background: var(--ba-navy);
}

@supports (padding: max(0px)) {
    .ios-nav-bottom {
        padding-bottom: max(8px, env(safe-area-inset-bottom));
    }
}