:root {
    --ink: #14171A;
    --paper: #E8E6DE;
    --structural: #2B4C5C;
    --severity: #8C3B2E;
    --neutral: #8A8778;
    
    --font-heading: 'IBM Plex Mono', monospace;
    --font-body: 'Lora', serif;
}

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

body {
    background-color: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    line-height: 1.6;
    font-size: 16px;
    padding-bottom: 4rem;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--structural);
    font-weight: 700;
}

.mono {
    font-family: var(--font-heading);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.main-header {
    border-bottom: 2px solid var(--structural);
    padding: 4rem 0 2rem;
    margin-bottom: 3rem;
}

.main-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--neutral);
    font-family: var(--font-heading);
    font-size: 1rem;
}

section {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--structural);
    padding-bottom: 0.5rem;
}

.section-num {
    color: var(--neutral);
    font-size: 1.25rem;
}

/* Evidence Tag Signature Element */
.catalog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}
@media(min-width: 768px) {
    .catalog-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.evidence-tag {
    position: relative;
    border: 2px solid var(--structural);
    border-left: 20px solid var(--structural);
    background-color: var(--paper);
    padding: 1.5rem;
    padding-right: 140px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Torn/perforated left edge */
.evidence-tag::before {
    content: '';
    position: absolute;
    left: -20px;
    top: -2px;
    bottom: -2px;
    width: 10px;
    background: radial-gradient(circle at left, var(--paper) 4px, transparent 5px);
    background-size: 100% 16px;
    background-repeat: repeat-y;
}

.tag-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.technique-id {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--ink);
    font-size: 1.1rem;
}

.rule-id {
    font-family: var(--font-heading);
    color: var(--structural);
    font-size: 0.85rem;
}

.severity {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    color: var(--neutral);
}

.severity.high {
    color: var(--severity);
}

.rule-title {
    font-family: var(--font-heading);
    color: var(--structural);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.rule-desc {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tag-footer {
    font-size: 0.85rem;
    color: var(--neutral);
    border-top: 1px dashed var(--neutral);
    padding-top: 0.5rem;
}

/* Rubber Stamp */
.stamp {
    position: absolute;
    top: 1.5rem;
    right: 1rem;
    transform: rotate(-6deg);
    border: 2px double var(--structural);
    color: var(--structural);
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.85;
    pointer-events: none;
    background: transparent;
    text-align: center;
    line-height: 1.2;
}

.stamp.matched {
    color: var(--severity);
    border-color: var(--severity);
    transform: rotate(8deg);
}

.stamp.coverage-gap {
    color: var(--ink);
    border-color: var(--ink);
    transform: rotate(-4deg);
}

/* Content Blocks */
.content-block {
    background-color: var(--paper);
    border: 1px solid var(--neutral);
    padding: 1.5rem;
    border-left: 4px solid var(--structural);
}

.content-block p {
    margin-bottom: 1rem;
}

.content-block p:last-child {
    margin-bottom: 0;
}

.evidence-block {
    background-color: #dfdcd3;
    padding: 1rem;
    margin: 1rem 0;
    border: 1px solid var(--neutral);
}

.evidence-block pre {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--ink);
    white-space: pre-wrap;
    word-break: break-all;
    margin-bottom: 0.5rem;
}

.evidence-block pre:last-child {
    margin-bottom: 0;
}

.evidence-label {
    color: var(--structural);
    font-weight: 700;
}

/* FP Analysis */
.fp-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.fp-item {
    border: 1px solid var(--neutral);
    padding: 1.5rem;
}

.fp-title {
    font-family: var(--font-heading);
    color: var(--structural);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    border-bottom: 1px dashed var(--neutral);
    padding-bottom: 0.5rem;
}

.fp-comparison {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
@media(min-width: 600px) {
    .fp-comparison {
        flex-direction: row;
    }
    .fp-col {
        flex: 1;
    }
}

.fp-col h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--ink);
}

footer {
    border-top: 1px solid var(--structural);
    padding-top: 2rem;
    text-align: center;
    color: var(--neutral);
}

footer a {
    color: var(--structural);
    text-decoration: none;
    font-family: var(--font-heading);
}

footer a:hover {
    text-decoration: underline;
}

/* Test Form Styling */
.test-form {
    background-color: var(--paper);
    border: 1px solid var(--structural);
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 700;
    color: var(--structural);
}

.test-form select, .test-form textarea {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    padding: 0.75rem;
    border: 1px solid var(--neutral);
    background-color: #fff;
    color: var(--ink);
    border-radius: 0;
}

.test-form select:focus, .test-form textarea:focus {
    outline: none;
    border-color: var(--structural);
    box-shadow: 0 0 0 2px rgba(43, 76, 92, 0.2);
}

#run-test-btn {
    background-color: var(--structural);
    color: var(--paper);
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    transition: background-color 0.2s;
}

#run-test-btn:hover {
    background-color: var(--ink);
}

#run-test-btn:disabled {
    background-color: var(--neutral);
    cursor: not-allowed;
}

.test-results {
    margin-top: 1.5rem;
    padding: 1rem;
    border: 1px solid var(--structural);
    background-color: #dfdcd3;
}

.test-results h4 {
    margin-bottom: 0.5rem;
}

.match-item {
    font-family: var(--font-heading);
    color: var(--severity);
    font-weight: 700;
    margin-bottom: 0.25rem;
}