/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Design tokens per specs/02_design_direction.md */
    --color-bg: #FAF8F3;
    --color-text: #1A1A18;
    --color-accent: #A8332B;
    --color-secondary: #2B3A42;
    --color-muted: #D8D2C4;
    --color-success: #2B5A3B;
    
    /* Typography */
    --font-serif: 'Georgia', 'Source Serif Pro', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica', 'Arial', sans-serif;
    --font-mono: 'Courier New', 'Consolas', monospace;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-serif);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 48px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-muted);
}

.title {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--color-secondary);
    letter-spacing: 0.01em;
}

/* Scan section */
.scan-section {
    margin-bottom: 32px;
}

.textarea-wrapper {
    position: relative;
    margin-bottom: 16px;
}

.text-input {
    width: 100%;
    min-height: 240px;
    padding: 20px;
    font-family: var(--font-serif);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: white;
    border: 2px solid var(--color-muted);
    border-radius: 4px;
    resize: vertical;
    transition: border-color 0.2s;
}

.text-input:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.text-input::placeholder {
    color: #9B9587;
}

.char-counter {
    position: absolute;
    bottom: 8px;
    right: 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-secondary);
    background: white;
    padding: 2px 6px;
    border-radius: 3px;
}

.char-counter.warning {
    color: var(--color-accent);
    font-weight: 600;
}

/* Controls */
.controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--color-secondary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #1F2C33;
}

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

.btn-secondary {
    background: transparent;
    color: var(--color-secondary);
    border: 1px solid var(--color-muted);
}

.btn-secondary:hover {
    border-color: var(--color-secondary);
    background: rgba(43, 58, 66, 0.05);
}

.btn-text {
    background: transparent;
    color: var(--color-secondary);
    text-decoration: underline;
    padding: 8px 12px;
}

.btn-text:hover {
    color: var(--color-text);
}

/* State messages */
.state-message {
    margin-top: 24px;
    padding: 16px 20px;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
}

.loading-state {
    background: rgba(43, 58, 66, 0.05);
    color: var(--color-secondary);
    border-left: 3px solid var(--color-secondary);
}

.error-state {
    background: rgba(168, 51, 43, 0.05);
    color: var(--color-accent);
    border-left: 3px solid var(--color-accent);
}

.success-state {
    background: rgba(43, 90, 59, 0.05);
    color: var(--color-success);
    border-left: 3px solid var(--color-success);
}

.hidden {
    display: none !important;
}

/* Results section */
.results-section {
    margin-top: 48px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-muted);
}

.results-title {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 600;
}

/* Annotated text */
.annotated-text {
    font-family: var(--font-serif);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 32px;
    padding: 24px;
    background: white;
    border: 1px solid var(--color-muted);
    border-radius: 4px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.fallacy-highlight {
    position: relative;
    text-decoration: underline;
    text-decoration-style: wavy;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    cursor: help;
    transition: background-color 0.2s;
}

.fallacy-highlight:hover {
    background-color: rgba(168, 51, 43, 0.08);
}

/* Tooltip */
.tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-text);
    color: white;
    padding: 12px 16px;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.4;
    max-width: 320px;
    width: max-content;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}

.fallacy-highlight:hover .tooltip {
    opacity: 1;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--color-text);
}

.tooltip-fallacy {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    display: block;
    margin-bottom: 4px;
}

.tooltip-explanation {
    color: #E8E6E0;
}

.tooltip-confidence {
    font-family: var(--font-mono);
    font-size: 11px;
    color: #9B9587;
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Findings list */
.findings-list {
    margin-top: 32px;
}

.finding-card {
    background: white;
    border: 1px solid var(--color-muted);
    border-left: 3px solid var(--color-accent);
    border-radius: 4px;
    padding: 16px 20px;
    margin-bottom: 16px;
}

.finding-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
}

.finding-fallacy {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
}

.finding-confidence {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.finding-category {
    font-family: var(--font-sans);
    font-size: 12px;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.finding-span {
    font-family: var(--font-serif);
    font-size: 14px;
    font-style: italic;
    color: var(--color-text);
    padding: 8px 12px;
    background: rgba(168, 51, 43, 0.05);
    border-radius: 3px;
    display: block;
    margin-bottom: 12px;
}

.finding-explanation {
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text);
}

/* Footer */
.footer {
    margin-top: auto;
    padding-top: 48px;
    border-top: 1px solid var(--color-muted);
    text-align: center;
}

.privacy-notice {
    font-family: var(--font-sans);
    font-size: 13px;
    color: var(--color-secondary);
    line-height: 1.5;
    margin-bottom: 12px;
}

.footer-links {
    font-family: var(--font-sans);
    font-size: 13px;
}

.footer-links a {
    color: var(--color-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--color-muted);
    transition: border-color 0.2s;
}

.footer-links a:hover {
    border-bottom-color: var(--color-secondary);
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 32px 16px;
    }
    
    .title {
        font-size: 28px;
    }
    
    .text-input {
        min-height: 180px;
        font-size: 15px;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .tooltip {
        position: fixed;
        bottom: 20px;
        left: 16px;
        right: 16px;
        top: auto;
        transform: none;
        max-width: none;
    }
    
    .tooltip::after {
        display: none;
    }
}

/* Print styles */
@media print {
    .controls,
    .footer,
    .results-header button {
        display: none;
    }
}