:root {
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    --surface: #ffffff;
    --surface-muted: rgba(255, 255, 255, 0.55);
    --backdrop: #f3f4ff;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --border-radius: 20px;
    --shadow-lg: 0 20px 45px rgba(82, 97, 255, 0.25);
    --shadow-sm: 0 10px 25px rgba(82, 97, 255, 0.18);
    --transition-fast: 150ms ease;
    --transition-medium: 250ms cubic-bezier(0.22, 1, 0.36, 1);
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: 'Segoe UI', 'Nunito', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    background: var(--gradient-primary);
    color: var(--text-primary);
    display: flex;
    align-items: stretch;
    justify-content: center;
    padding: clamp(12px, 2vw, 24px);
    box-sizing: border-box;
}

body[data-reduced-motion="on"] *,
html[data-reduced-motion="on"] * {
    animation: none !important;
    transition: none !important;
}

body[data-reduced-motion="on"],
html[data-reduced-motion="on"] {
    scroll-behavior: auto !important;
}

.app-root {
    width: min(1200px, 100%);
    min-height: 90vh;
    background: var(--surface);
    border-radius: calc(var(--border-radius) + 10px);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
}

.loading-state,
.noscript {
    margin: auto;
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    padding: 32px;
}

.app-shell {
    display: grid;
    grid-template-columns: 3fr 1fr;
    grid-template-rows: auto 1fr auto;
    min-height: 100%;
    background: var(--backdrop);
}

.app-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: clamp(16px, 2vw, 28px);
    background: var(--surface);
    border-bottom: 1px solid rgba(99, 102, 241, 0.08);
    gap: 12px;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-radius: calc(var(--border-radius) / 1.8);
    border: none;
    background: rgba(102, 126, 234, 0.08);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.avatar-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.avatar {
    font-size: 2rem;
}

.avatar-meta {
    text-align: left;
}

.avatar-name {
    font-weight: 600;
    display: block;
}

.avatar-sub {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(102, 126, 234, 0.1);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.primary-button,
.ghost-button,
.link-button {
    font-family: inherit;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
    border: none;
}

.primary-button {
    padding: 10px 22px;
    background: var(--gradient-secondary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.primary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.primary-button:not(:disabled):hover {
    transform: translateY(-2px);
}

.ghost-button {
    padding: 9px 18px;
    background: transparent;
    border: 1px solid rgba(102, 126, 234, 0.4);
    color: var(--text-secondary);
}

.ghost-button:hover {
    background: rgba(102, 126, 234, 0.08);
}

.link-button {
    padding: 0;
    background: none;
    border: none;
    color: #6366f1;
    text-decoration: none;
}

.link-button:hover {
    text-decoration: underline;
}

.app-main {
    padding: clamp(20px, 2vw, 32px);
}

.app-aside {
    padding: clamp(20px, 2vw, 32px);
    background: rgba(255, 255, 255, 0.6);
    border-left: 1px solid rgba(99, 102, 241, 0.08);
}

.panel {
    background: var(--surface);
    border-radius: var(--border-radius);
    padding: clamp(20px, 2vw, 32px);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel-header h1 {
    margin: 0;
    font-size: clamp(1.6rem, 2vw, 2.2rem);
    font-weight: 700;
}

.panel-header.with-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-weight: 600;
}

.panel-header p {
    margin: 4px 0 0;
    color: var(--text-secondary);
}

.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.profile-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: rgba(99, 102, 241, 0.08);
    border-radius: calc(var(--border-radius) / 1.8);
    padding: 18px 12px;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.profile-card-main {
    background: none;
    border: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 100%;
    font: inherit;
    color: inherit;
    cursor: pointer;
}

.profile-card-main:focus-visible {
    outline: 2px solid rgba(99, 102, 241, 0.5);
    outline-offset: 4px;
}

.profile-card-delete {
    align-self: stretch;
    font: inherit;
    border: none;
    border-radius: 12px;
    padding: 8px 12px;
    background: rgba(220, 53, 69, 0.12);
    color: #dc3545;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.profile-card-delete:hover {
    background: rgba(220, 53, 69, 0.2);
    transform: translateY(-2px);
}

.profile-avatar {
    font-size: 2.4rem;
}

.profile-name {
    font-weight: 600;
}

.profile-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.profile-form {
    background: rgba(255, 255, 255, 0.7);
    border-radius: calc(var(--border-radius) / 1.6);
    padding: 18px;
    display: grid;
    gap: 14px;
}

.profile-form h2 {
    margin: 0;
    font-size: 1.1rem;
}

.form-group {
    display: grid;
    gap: 6px;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    font: inherit;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(99, 102, 241, 0.25);
    background: #fff;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
}

.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}

.quick-card {
    background: #fff;
    border-radius: calc(var(--border-radius) / 1.6);
    padding: 14px;
    display: flex;
    gap: 12px;
    align-items: center;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.12);
}

.quick-card strong {
    display: block;
    font-size: 1.1rem;
}

.panel-section header h2 {
    margin: 0 0 4px;
}

.kp-note {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.challenge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    max-height: clamp(320px, 55vh, 560px);
    overflow-y: auto;
    padding-right: 6px;
}

.skills-grid::-webkit-scrollbar {
    width: 6px;
}

.skills-grid::-webkit-scrollbar-track {
    background: rgba(99, 102, 241, 0.08);
    border-radius: 12px;
}

.skills-grid::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.35);
    border-radius: 12px;
}

.skill-card {
    background: var(--surface);
    border-radius: calc(var(--border-radius) / 1.6);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: 12px;
}

.skill-card header h3 {
    margin: 0;
    font-size: 1.1rem;
}

.skill-card header p {
    margin: 4px 0 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.challenge-card {
    background: var(--surface);
    border-radius: calc(var(--border-radius) / 1.4);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.9);
}

.challenge-card::before {
    content: '';
    position: absolute;
    inset: -40% -40% auto auto;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: var(--accent, var(--gradient-accent));
    opacity: 0.12;
    transform: rotate(20deg);
}

.challenge-card header {
    position: relative;
    z-index: 1;
}

.panel-toolbar {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin: 12px 0;
}

.difficulty-badges {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.difficulty-button {
    padding: 8px 16px;
    border-radius: 999px;
    border: none;
    background: rgba(102, 126, 234, 0.12);
    cursor: pointer;
    font-weight: 600;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.difficulty-button:hover {
    transform: translateY(-2px);
    background: rgba(102, 126, 234, 0.2);
}

.quiz-panel {
    gap: 16px;
}

.kp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.kp-card {
    background: var(--surface);
    border-radius: calc(var(--border-radius) / 1.4);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: 12px;
}

.kp-card header h3 {
    margin: 0;
    font-size: 1.15rem;
}

.kp-card header p {
    margin: 6px 0 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.kp-child-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.kp-helper {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.quiz-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.progress-bar {
    height: 10px;
    background: rgba(102, 126, 234, 0.15);
    border-radius: 999px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-secondary);
    transition: width var(--transition-medium);
}

.question-card {
    background: #fff;
    border-radius: calc(var(--border-radius) / 1.4);
    padding: clamp(20px, 2vw, 32px);
    display: grid;
    gap: 20px;
    box-shadow: var(--shadow-sm);
}

.question-text {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 600;
    margin: 0;
}

.question-sub {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.option-button {
    padding: 14px;
    border-radius: 14px;
    border: 1px solid rgba(102, 126, 234, 0.3);
    background: rgba(102, 126, 234, 0.08);
    cursor: pointer;
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.option-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    background: rgba(102, 126, 234, 0.16);
}

.option-button.correct {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-color: #059669;
    color: white;
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(16, 185, 129, 0.5);
    animation: pulse-correct 0.6s ease-out, bounce-in 0.5s ease-out;
    position: relative;
    overflow: hidden;
}

.option-button.correct::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.3) 50%, transparent 70%);
    animation: shimmer 1.5s ease-in-out infinite;
}

.option-button.incorrect {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border-color: #dc2626;
    color: white;
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(239, 68, 68, 0.5);
    animation: shake 0.5s ease-in-out, pulse-incorrect 0.6s ease-out;
    position: relative;
    overflow: hidden;
}

.option-button:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.option-button.correct::after,
.option-button.incorrect::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 14px;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background-size: contain;
    background-repeat: no-repeat;
    animation: icon-pop 0.4s ease-out 0.2s both;
}

.option-button.correct::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E");
}

.option-button.incorrect::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z'/%3E%3C/svg%3E");
}

/* Special Effects Animations */
@keyframes pulse-correct {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 12px 35px rgba(16, 185, 129, 0.5); }
}

@keyframes pulse-incorrect {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 12px 35px rgba(239, 68, 68, 0.5); }
}

@keyframes bounce-in {
    0% { transform: scale(0.3); }
    50% { transform: scale(1.1); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1.05); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0) scale(1.05); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px) scale(1.05); }
    20%, 40%, 60%, 80% { transform: translateX(4px) scale(1.05); }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes icon-pop {
    0% { transform: translateY(-50%) scale(0); opacity: 0; }
    70% { transform: translateY(-50%) scale(1.2); opacity: 1; }
    100% { transform: translateY(-50%) scale(1); opacity: 1; }
}

@keyframes confetti-fall {
    0% { transform: translateY(-100px) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}

@keyframes float-up {
    0% { transform: translate(-50%, -40%) scale(0.8); opacity: 0; }
    20% { transform: translate(-50%, -60%) scale(1.1); opacity: 1; }
    80% { transform: translate(-50%, -60%) scale(1.1); opacity: 1; }
    100% { transform: translate(-50%, -80%) scale(0.9); opacity: 0; }
}

@keyframes particle-explosion {
    0% { transform: translate(0, 0) scale(0); opacity: 1; }
    100% { transform: translate(var(--tx), var(--ty)) scale(1); opacity: 0; }
}

.answer-feedback {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: var(--surface);
    padding: 32px 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    text-align: center;
    z-index: 1000;
    opacity: 0;
    transition: transform var(--transition-medium), opacity var(--transition-medium);
    pointer-events: none;
    animation: float-up 2s ease-in-out;
}

.answer-feedback.show {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.answer-feedback.correct {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: 3px solid rgba(255, 255, 255, 0.3);
}

.answer-feedback.incorrect {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border: 3px solid rgba(255, 255, 255, 0.3);
}

.answer-feedback h3 {
    margin: 0 0 12px;
    font-size: 1.8rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: text-glow 1s ease-in-out infinite alternate;
}

.answer-feedback p {
    margin: 0;
    font-size: 1.1rem;
    opacity: 0.9;
}

@keyframes text-glow {
    from { text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); }
    to { text-shadow: 0 2px 20px rgba(255, 255, 255, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2); }
}

.feedback-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium);
    backdrop-filter: blur(4px);
}

.feedback-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.confetti {
    position: fixed;
    width: 12px;
    height: 12px;
    background: var(--color);
    border-radius: 2px;
    z-index: 998;
    animation: confetti-fall var(--duration) linear forwards;
    top: -20px;
    left: var(--left);
}

.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--color);
    border-radius: 50%;
    pointer-events: none;
    animation: particle-explosion 1s ease-out forwards;
}

.star-effect {
    position: absolute;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, #ffd700 30%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: star-twinkle 0.8s ease-out forwards;
}

@keyframes star-twinkle {
    0% { transform: scale(0) rotate(0deg); opacity: 1; }
    50% { transform: scale(1.2) rotate(180deg); opacity: 0.8; }
    100% { transform: scale(0) rotate(360deg); opacity: 0; }
}

.sparkle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: white;
    border-radius: 50%;
    pointer-events: none;
    animation: sparkle-trail 0.6s ease-out forwards;
}

@keyframes sparkle-trail {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { transform: translate(var(--sparkle-x), var(--sparkle-y)) scale(0); opacity: 0; }
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    text-align: center;
}

.summary-stats strong {
    display: block;
    font-size: 1.6rem;
}

.summary-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.mistake-actions {
    position: sticky;
    bottom: 0;
    margin: 0 -18px -18px;
    padding: 16px 18px 18px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.65) 0%, rgba(255, 255, 255, 0.98) 55%, rgba(255, 255, 255, 1) 100%);
    box-shadow: 0 -6px 16px rgba(102, 126, 234, 0.12);
    backdrop-filter: blur(4px);
    border-radius: calc(var(--border-radius) / 1.4);
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.analytics-card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: calc(var(--border-radius) / 1.6);
    padding: 18px;
    box-shadow: var(--shadow-sm);
}

.analytics-card h2 {
    margin-top: 0;
}

.mistake-focus-list {
    list-style: none;
    margin: 0 0 12px;
    padding: 0;
    display: grid;
    gap: 8px;
}

.mistake-focus-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.mistake-focus-list span {
    font-weight: 500;
}

.chip-button {
    font-family: inherit;
    font-weight: 600;
    border-radius: 999px;
    border: 1px solid rgba(102, 126, 234, 0.4);
    background: transparent;
    color: var(--text-secondary);
    padding: 6px 16px;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.chip-button:hover {
    background: rgba(102, 126, 234, 0.08);
    transform: translateY(-1px);
}

.chip-button.is-active {
    background: rgba(102, 126, 234, 0.16);
    color: #4338ca;
    border-color: rgba(102, 126, 234, 0.6);
}

.mistake-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
    text-align: center;
}

.mistake-summary strong {
    display: block;
    font-size: 1.5rem;
}

.mistake-summary span {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.mistake-filters {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.mistake-filter-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mistake-focus {
    background: rgba(255, 255, 255, 0.82);
    border-radius: calc(var(--border-radius) / 1.4);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.mistake-focus h2 {
    margin: 0 0 12px;
}

.mistake-focus ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 8px;
}

.mistake-focus li {
    display: flex;
    align-items: center;
    width: 100%;
}

.mistake-focus-button {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    background: rgba(102, 126, 234, 0.08);
    border: 1px solid rgba(102, 126, 234, 0.18);
    border-radius: calc(var(--border-radius) / 2.4);
    padding: 10px 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.mistake-focus-button span {
    font-weight: 600;
}

.mistake-focus-button:hover {
    background: rgba(102, 126, 234, 0.16);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.mistake-focus strong {
    font-weight: 600;
}

.mistake-list {
    display: grid;
    gap: 16px;
    margin-bottom: 24px;
}

.mistake-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: clamp(520px, 78vh, 860px);
    min-height: 0;
}

.mistake-panel-scroll {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding-right: 6px;
    padding-bottom: 140px;
    scrollbar-width: thin;
    scrollbar-color: rgba(99, 102, 241, 0.7) rgba(99, 102, 241, 0.18);
}

.mistake-panel-scroll::-webkit-scrollbar {
    width: 8px;
}

.mistake-panel-scroll::-webkit-scrollbar-track {
    background: rgba(99, 102, 241, 0.18);
    border-radius: 12px;
}

.mistake-panel-scroll::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.85) 100%);
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.6);
}

.mistake-card {
    background: rgba(255, 255, 255, 0.86);
    border-radius: calc(var(--border-radius) / 1.6);
    padding: 18px;
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: 12px;
}

.mistake-card header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.mistake-card time {
    white-space: nowrap;
}

.mistake-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mistake-tag {
    background: rgba(102, 126, 234, 0.12);
    color: #4338ca;
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.mistake-tag.is-skill {
    background: rgba(236, 72, 153, 0.16);
    color: #be185d;
}

.mistake-body {
    display: grid;
    gap: 10px;
}

.mistake-question {
    margin: 0;
    font-weight: 600;
    font-size: 1.05rem;
}

.mistake-detail {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.mistake-options {
    margin: 0;
    padding-left: 18px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.mistake-answers {
    display: grid;
    gap: 8px;
    margin: 0;
}

.mistake-answers div {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: baseline;
}

.mistake-answers dt {
    margin: 0;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.mistake-answers dd {
    margin: 0;
    font-weight: 600;
}

.mistake-card footer {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.analytics-card ul {
    list-style: none;
    padding: 0;
    margin: 12px 0 0;
    display: grid;
    gap: 8px;
}

.analytics-card li {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
}

.aside-panel {
    background: rgba(255, 255, 255, 0.9);
    border-radius: calc(var(--border-radius) / 1.6);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    display: grid;
    gap: 16px;
}

.aside-panel h2 {
    margin: 0;
}

.aside-panel dl {
    margin: 0;
    display: grid;
    gap: 10px;
}

.aside-panel dt {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.aside-panel dd {
    margin: 0;
    font-weight: 600;
}

.app-toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translate(-50%, 100%);
    background: var(--gradient-secondary);
    color: #fff;
    padding: 14px 24px;
    border-radius: 999px;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-medium), opacity var(--transition-medium);
    opacity: 0;
    pointer-events: none;
    z-index: 1000;
}

.app-toast.is-visible {
    transform: translate(-50%, 0);
    opacity: 1;
}

.app-toast.is-interactive {
    pointer-events: auto;
}

.app-toast.is-dialog {
    top: 50%;
    bottom: auto;
    transform: translate(-50%, -40%);
    width: min(360px, calc(100vw - 48px));
    padding: 24px;
    border-radius: calc(var(--border-radius) * 0.9);
    background: var(--surface);
    color: var(--text-primary);
}

.app-toast.is-dialog.is-visible {
    transform: translate(-50%, -50%);
}

.toast-panel {
    display: grid;
    gap: 12px;
    text-align: center;
}

.toast-panel p {
    margin: 0;
    font-size: 0.95rem;
}

.toast-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.danger-button {
    font: inherit;
    border: none;
    border-radius: 999px;
    padding: 8px 18px;
    background: linear-gradient(135deg, #ff6b6b 0%, #c9184a 100%);
    color: #fff;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.danger-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(201, 24, 74, 0.35);
}

.empty {
    background: rgba(102, 126, 234, 0.08);
    border-radius: calc(var(--border-radius) / 1.8);
    padding: 18px;
    text-align: center;
    color: var(--text-secondary);
}

.sidebar-empty,
.aside-empty {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

@media (max-width: 960px) {
    .app-shell {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto 1fr auto;
    }

    .app-aside {
        grid-row: 3;
        border-left: none;
        border-top: 1px solid rgba(99, 102, 241, 0.1);
        background: transparent;
    }
}

@media (max-width: 720px) {
    body {
        padding: 0;
    }

    .app-root {
        border-radius: 0;
    }

    .app-header {
        flex-direction: column;
        align-items: stretch;
    }

    .header-right {
        flex-wrap: wrap;
        justify-content: center;
    }

    .app-main,
    .app-aside {
        padding: 20px;
    }

    .summary-actions {
        flex-direction: column;
    }
}

/* Pemulihan Tagline Styles */
.pemulihan-tagline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 12px 0;
    padding: 12px 20px;
    background: rgba(102, 126, 234, 0.08);
    border-radius: calc(var(--border-radius) / 1.8);
    border: 1px solid rgba(102, 126, 234, 0.18);
    animation: fade-in 0.6s ease-out;
}

.pemulihan-tagline .tagline-icon {
    font-size: 1.1rem;
}

.pemulihan-tagline .tagline-text {
    font-weight: 600;
}

@keyframes fade-in {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 1; transform: translateY(0); }
}

@media (max-width: 720px) {
    .pemulihan-tagline {
        font-size: 0.85rem;
        padding: 10px 16px;
        flex-direction: column;
        gap: 4px;
    }
    
    .pemulihan-tagline .tagline-icon {
        font-size: 1rem;
    }
}