/* CSS Variables - Prompt Review Design System */
:root {
    /* Background Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #18181f;
    --bg-elevated: #1e1e28;
    --bg-hover: #262632;
    --bg-input: #15151d;

    /* Text Colors */
    --text-primary: #f5f5f7;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-muted: #52525b;

    /* Accent Colors */
    --accent-primary: #14b8a6;
    --accent-secondary: #0d9488;
    --accent-glow: rgba(20, 184, 166, 0.15);
    --accent-border: rgba(20, 184, 166, 0.3);

    /* Quality Level Colors */
    --excellent-primary: #22c55e;
    --excellent-glow: rgba(34, 197, 94, 0.15);
    --excellent-border: rgba(34, 197, 94, 0.3);

    --good-primary: #14b8a6;
    --good-glow: rgba(20, 184, 166, 0.15);
    --good-border: rgba(20, 184, 166, 0.3);

    --fair-primary: #f59e0b;
    --fair-glow: rgba(245, 158, 11, 0.15);
    --fair-border: rgba(245, 158, 11, 0.3);

    --poor-primary: #ef4444;
    --poor-glow: rgba(239, 68, 68, 0.15);
    --poor-border: rgba(239, 68, 68, 0.3);

    /* Status Colors */
    --success: #22c55e;
    --success-glow: rgba(34, 197, 94, 0.15);
    --error: #ef4444;
    --error-glow: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --warning-glow: rgba(245, 158, 11, 0.15);

    /* Border Colors */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.15);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Typography */
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* App Container */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-default);
}

.header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header__logo {
    width: 40px;
    height: 40px;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.header__title-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.header__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.header__subtitle {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin: 0;
}

.header__status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    transition: background var(--transition-normal);
}

.status-indicator.online {
    background: var(--success);
    animation: pulse 2s infinite;
}

.status-indicator.error {
    background: var(--error);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Main */
.main {
    flex: 1;
    padding: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Input Section */
.input-section {
    margin-bottom: var(--space-xl);
}

.input-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.input-card__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.input-card__description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.input-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.input-textarea {
    width: 100%;
    min-height: 200px;
    padding: var(--space-lg);
    background: var(--bg-input);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition-fast);
}

.input-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.input-textarea::placeholder {
    color: var(--text-muted);
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.input-counter {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.analyze-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.analyze-btn:hover:not(:disabled) {
    background: var(--accent-secondary);
    transform: translateY(-1px);
}

.analyze-btn:active:not(:disabled) {
    transform: translateY(0);
}

.analyze-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    width: 18px;
    height: 18px;
}

/* Loading Section */
.loading-section {
    margin-bottom: var(--space-xl);
}

.loading-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-default);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* Error Section */
.error-section {
    margin-bottom: var(--space-xl);
}

.error-card {
    background: var(--error-glow);
    border: 1px solid var(--error);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.error-icon {
    width: 48px;
    height: 48px;
    color: var(--error);
}

.error-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.error-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
    max-width: 400px;
}

.error-retry-btn {
    padding: var(--space-sm) var(--space-lg);
    background: var(--error);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.error-retry-btn:hover {
    background: #dc2626;
}

/* Results Section */
.results-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* Result Card */
.result-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.result-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.result-icon {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.result-icon.not-prompt-icon {
    font-size: 2rem;
}

.result-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.result-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Quality Card */
.quality-card {
    position: relative;
}

.quality-card.excellent {
    border-left: 4px solid var(--excellent-primary);
}

.quality-card.good {
    border-left: 4px solid var(--good-primary);
}

.quality-card.fair {
    border-left: 4px solid var(--fair-primary);
}

.quality-card.poor {
    border-left: 4px solid var(--poor-primary);
}

.quality-badge {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-xs);
}

.quality-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.quality-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.quality-value.excellent {
    color: var(--excellent-primary);
}

.quality-value.good {
    color: var(--good-primary);
}

.quality-value.fair {
    color: var(--fair-primary);
}

.quality-value.poor {
    color: var(--poor-primary);
}

/* Purpose Section */
.purpose-section {
    margin-bottom: var(--space-lg);
}

.section-title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.purpose-text {
    font-size: 0.9375rem;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Scores Section */
.scores-section {
    margin-bottom: var(--space-lg);
}

.scores-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.score-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

.score-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.score-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.score-value {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.score-bar {
    height: 6px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.score-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.overall-score {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.overall-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.overall-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

/* Metrics Grid */
.metrics-section {
    margin-bottom: var(--space-lg);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.metric-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.metric-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.metric-value {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Conversion Section */
.conversion-section {
    margin-bottom: var(--space-lg);
}

.conversion-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.conversion-list li {
    font-size: 0.875rem;
    color: var(--text-primary);
    padding-left: var(--space-lg);
    position: relative;
    line-height: 1.5;
}

.conversion-list li::before {
    content: counter(list-item) ".";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: 600;
}

.conversion-list {
    counter-reset: list-item;
}

.conversion-list li {
    counter-increment: list-item;
}

/* Analysis Grid */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.analysis-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.analysis-list li {
    font-size: 0.875rem;
    color: var(--text-primary);
    padding-left: var(--space-lg);
    position: relative;
    line-height: 1.5;
}

.analysis-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

/* Strengths Card */
.strengths-card {
    border-left: 3px solid var(--success);
}

.strengths-card .analysis-list li::before {
    color: var(--success);
}

/* Weaknesses Card */
.weaknesses-card {
    border-left: 3px solid var(--warning);
}

.weaknesses-card .analysis-list li::before {
    color: var(--warning);
}

/* Recommendations Card */
.recommendations-card {
    border-left: 3px solid var(--accent-primary);
}

.recommendations-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.recommendation-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.recommendation-priority {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.recommendation-priority.high {
    background: var(--error-glow);
    color: var(--error);
}

.recommendation-priority.medium {
    background: var(--warning-glow);
    color: var(--warning);
}

.recommendation-priority.low {
    background: var(--success-glow);
    color: var(--success);
}

.recommendation-text {
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Improved Prompt Card */
.improved-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--accent-border);
}

.improved-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.card-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-icon {
    font-size: 1.25rem;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.improved-prompt {
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 400px;
    overflow-y: auto;
}

/* Processing Time */
.processing-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: var(--space-md);
}

/* Footer */
.footer {
    padding: var(--space-lg) var(--space-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.footer__text {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.footer__brand {
    color: var(--accent-primary);
    font-weight: 500;
}

.footer__separator {
    margin: 0 var(--space-sm);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--space-md);
        padding: var(--space-md);
    }

    .main {
        padding: var(--space-md);
    }

    .input-card {
        padding: var(--space-lg);
    }

    .quality-badge {
        position: static;
        flex-direction: row;
        justify-content: space-between;
        margin-bottom: var(--space-md);
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .analysis-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .input-footer {
        flex-direction: column;
        gap: var(--space-md);
        align-items: stretch;
    }

    .analyze-btn {
        justify-content: center;
    }
}