* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-1: #080616;
    --bg-2: #120828;
    --bg-3: #1a0f3a;
    --accent-1: #a78bfa;
    --accent-2: #ec4899;
    --accent-3: #06b6d4;
    --accent-4: #fbbf24;
    --accent-5: #60a5fa;
    --accent-6: #f472b6;
    --text: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    --glass: rgba(255, 255, 255, 0.04);
    --glass-hover: rgba(255, 255, 255, 0.08);
    --border: rgba(167, 139, 250, 0.2);
    --border-bright: rgba(167, 139, 250, 0.4);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    --glow: 0 0 40px rgba(167, 139, 250, 0.3);
}

html, body {
    min-height: 100vh;
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    color: var(--text);
    background-color: var(--bg-1);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at top, var(--bg-3) 0%, var(--bg-2) 40%, var(--bg-1) 100%);
    z-index: -2;
    pointer-events: none;
}

#stars {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

#app {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    padding: 3rem 1.5rem;
}

.screen {
    display: none;
    width: 100%;
    max-width: 820px;
    margin: 0 auto;
    animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.screen.active {
    display: block;
}

.screen--welcome.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================
   Welcome Screen
   ========================================= */
.welcome-content {
    text-align: center;
    padding: 2rem 1rem;
}

.compass-icon {
    position: relative;
    width: 140px;
    height: 140px;
    margin: 0 auto 2.5rem;
}

.compass-ring {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-radius: 50%;
    border-top-color: var(--accent-1);
    border-right-color: var(--accent-2);
    animation: rotate 8s linear infinite;
    box-shadow: 0 0 40px rgba(167, 139, 250, 0.4);
}

.compass-ring--inner {
    inset: 18px;
    border-top-color: transparent;
    border-bottom-color: var(--accent-3);
    border-left-color: var(--accent-4);
    animation-duration: 6s;
    animation-direction: reverse;
}

.compass-ring--core {
    inset: 36px;
    border: 1px solid var(--accent-1);
    border-right-color: transparent;
    animation-duration: 4s;
}

.compass-center {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle, #fff, var(--accent-1), var(--accent-2));
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 30px var(--accent-1), 0 0 60px var(--accent-2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.8;
    }
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

.title {
    margin-bottom: 1.5rem;
}

.title-zh {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: clamp(2.8rem, 7vw, 4.5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 40%, var(--accent-3) 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.3em;
    margin-bottom: 0.8rem;
    margin-left: 0.15em;
    line-height: 1.2;
    animation: shimmer 4s ease infinite;
    background-size: 200% 200%;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.title-en {
    display: block;
    font-size: 0.85rem;
    letter-spacing: 0.5em;
    color: var(--text-muted);
    font-weight: 300;
    margin-left: 0.25em;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    letter-spacing: 0.15em;
    font-weight: 300;
}

.welcome-content .description {
    font-size: 1.15rem;
    line-height: 2.2;
    color: var(--text);
    margin-bottom: 3rem;
    font-family: 'Noto Serif SC', serif;
    font-weight: 400;
    opacity: 0.9;
}

.dimensions-preview {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.8rem;
    margin-bottom: 3rem;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.dim-item {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.2rem 0.5rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: default;
}

.dim-item:hover {
    transform: translateY(-6px);
    background: var(--glass-hover);
    border-color: var(--border-bright);
    box-shadow: 0 10px 30px rgba(167, 139, 250, 0.2);
}

.dim-symbol {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.4rem;
    line-height: 1;
}

.dim-item:nth-child(2) .dim-symbol {
    background: linear-gradient(135deg, var(--accent-3), var(--accent-5));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dim-item:nth-child(3) .dim-symbol {
    background: linear-gradient(135deg, var(--accent-2), var(--accent-6));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dim-item:nth-child(4) .dim-symbol {
    background: linear-gradient(135deg, var(--accent-4), #f97316);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dim-item:nth-child(5) .dim-symbol {
    background: linear-gradient(135deg, var(--accent-5), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dim-item:nth-child(6) .dim-symbol {
    background: linear-gradient(135deg, var(--accent-6), var(--accent-1));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.dim-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    letter-spacing: 0.05em;
}

/* =========================================
   Buttons
   ========================================= */
.btn {
    display: inline-block;
    padding: 1.1rem 3.5rem;
    border: none;
    border-radius: 100px;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 500;
    letter-spacing: 0.3em;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--text);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 50%, var(--accent-3) 100%);
    background-size: 200% 200%;
    box-shadow: 0 10px 30px rgba(167, 139, 250, 0.4);
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.7s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(167, 139, 250, 0.6);
    background-position: 100% 100%;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.9rem 2rem;
    font-size: 0.9rem;
    letter-spacing: 0.2em;
}

.btn-ghost:hover {
    background: var(--glass);
    color: var(--text);
    border-color: var(--border-bright);
}

.hint {
    margin-top: 1.8rem;
    font-size: 0.8rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
}

/* =========================================
   Test Screen
   ========================================= */
.screen--test {
    max-width: 720px;
}

.test-header {
    margin-bottom: 2.5rem;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.progress-bar {
    flex: 1;
    height: 3px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 100px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-3));
    width: 0%;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 100px;
    box-shadow: 0 0 15px var(--accent-1);
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 8px;
    height: 100%;
    background: #fff;
    box-shadow: 0 0 15px #fff;
    border-radius: 100px;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    font-family: 'Noto Serif SC', serif;
}

#current-q {
    color: var(--accent-1);
    font-weight: 700;
    font-size: 1rem;
}

.current-dimension {
    text-align: center;
    font-size: 0.9rem;
    color: var(--accent-1);
    letter-spacing: 0.3em;
    font-family: 'Noto Serif SC', serif;
    font-weight: 500;
}

.question-card {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 3.5rem 2.5rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow), var(--glow);
    animation: slideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.question-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-1), transparent);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.question-number {
    font-family: 'Noto Serif SC', serif;
    font-size: 0.85rem;
    color: var(--accent-1);
    letter-spacing: 0.4em;
    margin-bottom: 1.2rem;
    font-weight: 700;
}

.question-text {
    font-family: 'Noto Serif SC', serif;
    font-size: clamp(1.3rem, 3vw, 1.7rem);
    font-weight: 500;
    line-height: 1.7;
    margin-bottom: 2.8rem;
    color: var(--text);
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.option {
    display: flex;
    align-items: center;
    padding: 1.2rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    font-size: 1rem;
    color: var(--text);
    text-align: left;
    width: 100%;
    font-family: inherit;
    position: relative;
}

.option:hover {
    background: var(--glass-hover);
    border-color: var(--border-bright);
    transform: translateX(6px);
    box-shadow: -4px 0 20px rgba(167, 139, 250, 0.15);
}

.option.selected {
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), rgba(236, 72, 153, 0.1));
    border-color: var(--accent-1);
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.2);
}

.option-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border-bright);
    margin-right: 1.2rem;
    flex-shrink: 0;
    position: relative;
    transition: all 0.3s ease;
}

.option.selected .option-indicator {
    border-color: var(--accent-1);
    background: radial-gradient(circle, var(--accent-1), var(--accent-2));
    box-shadow: 0 0 15px var(--accent-1);
}

.option.selected .option-indicator::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.option-content {
    flex: 1;
}

.option-label {
    font-size: 0.72rem;
    color: var(--accent-1);
    letter-spacing: 0.2em;
    margin-bottom: 0.35rem;
    opacity: 0.85;
    font-weight: 500;
}

.option-text {
    font-size: 0.98rem;
    line-height: 1.5;
    color: var(--text);
}

.option.neutral .option-text {
    color: var(--text-muted);
    font-style: italic;
}

.test-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    gap: 1rem;
}

.test-footer .btn-ghost {
    padding: 0.8rem 1.5rem;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
}

/* =========================================
   Result Screen
   ========================================= */
.screen--result {
    max-width: 920px;
    padding: 2rem 0;
}

.result-container {
    animation: fadeIn 1s ease;
}

.result-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.5em;
    margin-bottom: 1.2rem;
    font-weight: 300;
}

.archetype-name {
    font-family: 'Noto Serif SC', serif;
    font-size: clamp(2.8rem, 6vw, 4.8rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.2em;
    margin-bottom: 0.8rem;
    margin-left: 0.1em;
    line-height: 1.1;
    animation: shimmer 4s ease infinite;
    background-size: 200% 200%;
    text-shadow: 0 0 60px rgba(167, 139, 250, 0.4);
}

.archetype-title {
    font-size: 1.05rem;
    color: var(--accent-1);
    letter-spacing: 0.25em;
    font-family: 'Noto Serif SC', serif;
    margin-bottom: 1rem;
    font-weight: 400;
}

.archetype-mbti {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: var(--glass);
    border: 1px solid var(--border-bright);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent-2);
    letter-spacing: 0.3em;
    font-family: 'Noto Serif SC', serif;
    font-weight: 500;
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.result-grid--theories {
    grid-template-columns: repeat(3, 1fr);
}

.result-card {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 2.2rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-1), transparent);
}

.result-card:last-child {
    margin-bottom: 0;
}

.result-grid .result-card {
    margin-bottom: 0;
}

.card-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--accent-1);
    letter-spacing: 0.2em;
}

.result-card--radar {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result-card--radar .card-title {
    align-self: flex-start;
}

#radar-chart {
    width: 100%;
    height: auto;
    max-width: 400px;
    display: block;
    margin: 0 auto;
}

.dim-scores {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
    margin-top: 1.8rem;
    font-size: 0.85rem;
    width: 100%;
}

.score-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.9rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(167, 139, 250, 0.1);
    border-radius: 10px;
    font-size: 0.82rem;
}

.score-item span:first-child {
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.score-item span:last-child {
    color: var(--accent-1);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.result-card--desc .archetype-desc {
    line-height: 1.9;
    color: var(--text);
    margin-bottom: 1.8rem;
    font-family: 'Noto Serif SC', serif;
    font-size: 0.98rem;
}

.traits {
    display: grid;
    gap: 1.5rem;
}

.trait-group h4 {
    font-family: 'Noto Serif SC', serif;
    font-size: 0.95rem;
    margin-bottom: 0.9rem;
    color: var(--accent-2);
    letter-spacing: 0.15em;
    font-weight: 700;
}

.trait-group ul {
    list-style: none;
    padding: 0;
}

.trait-group li {
    padding: 0.4rem 0 0.4rem 1.5rem;
    position: relative;
    color: var(--text);
    font-size: 0.9rem;
    line-height: 1.7;
}

.trait-group li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--accent-1);
    font-size: 0.7rem;
    top: 0.65rem;
}

/* Theory Cards */
.theory-card {
    text-align: center;
    padding: 2rem 1.5rem;
}

.theory-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.35em;
    margin-bottom: 1.2rem;
    font-weight: 300;
}

.theory-value {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.35rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
    line-height: 1.4;
}

.theory-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Growth Path */
.result-card--growth {
    background: linear-gradient(135deg, var(--glass), rgba(236, 72, 153, 0.03));
}

.result-card--growth p {
    line-height: 2;
    font-size: 1rem;
    color: var(--text);
    font-family: 'Noto Serif SC', serif;
    font-style: italic;
}

/* Matches */
.matches-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    letter-spacing: 0.1em;
}

.matches {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.match-item {
    padding: 0.8rem 1.6rem;
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), rgba(236, 72, 153, 0.12));
    border: 1px solid var(--border-bright);
    border-radius: 100px;
    font-family: 'Noto Serif SC', serif;
    font-size: 0.95rem;
    color: var(--accent-1);
    transition: all 0.3s ease;
    cursor: default;
    letter-spacing: 0.1em;
}

.match-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(167, 139, 250, 0.2);
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.25), rgba(236, 72, 153, 0.2));
}

.result-actions {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    margin-top: 3.5rem;
    flex-wrap: wrap;
}

.disclaimer {
    text-align: center;
    margin-top: 2.5rem;
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 720px) {
    #app {
        padding: 2rem 1rem;
    }

    .dimensions-preview {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.7rem;
    }

    .result-grid,
    .result-grid--theories {
        grid-template-columns: 1fr;
    }

    .question-card {
        padding: 2.5rem 1.5rem;
    }

    .result-card {
        padding: 1.8rem 1.5rem;
    }

    .btn {
        padding: 1rem 2.5rem;
        font-size: 0.95rem;
    }

    .welcome-content .description {
        font-size: 1.05rem;
        line-height: 2;
    }

    .dim-scores {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 420px) {
    .title-zh {
        letter-spacing: 0.2em;
    }

    .archetype-name {
        letter-spacing: 0.15em;
    }

    .test-footer {
        flex-direction: row;
    }

    .test-footer .btn-ghost {
        padding: 0.7rem 1.2rem;
        font-size: 0.8rem;
    }
}