/**
 * PoHW Verification Web App - Branded Styles
 * Minimal, durable, long-term design aligned with PoHW protocol
 */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
    --bg-primary: #0c0c0c;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #d1d1d1;
    --text-secondary: #a0a0a0;
    --text-tertiary: #666666;
    --accent-green: #7ef9a9;
    --accent-green-bright: #00ff9c;
    --accent-green-hover: #adffda;
    --accent-green-glow: rgba(0, 255, 120, 0.2);
    --border-color: #333333;
    --border-dashed: #444444;
    --success-color: #00ff9c;
    --error-color: #ff6b6b;
    --shadow-glow: 0 0 10px rgba(0, 255, 120, 0.1);
    --text-glow: 0 0 2px rgba(0, 255, 120, 0.2);
}

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

body {
    font-family: 'IBM Plex Mono', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.6;
    min-height: 100vh;
    padding: 4vw;
}

::selection {
    background: var(--accent-green-bright);
    color: var(--bg-primary);
}

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

/* Header */
header {
    text-align: left;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px dashed var(--border-dashed);
}

.header-content h1 {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    text-shadow: var(--text-glow);
    letter-spacing: 0.05em;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Cards */
.verification-card,
.info-card,
.result-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-glow);
}

.card-header {
    margin-bottom: 1.5rem;
}

.card-header h2 {
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.card-header p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Tabs */
.verification-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px dashed var(--border-dashed);
}

.tab-button {
    padding: 0.75rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
    font-family: 'IBM Plex Mono', monospace;
    cursor: pointer;
    border-bottom: 1px solid transparent;
    margin-bottom: -1px;
    transition: all 0.2s;
    letter-spacing: 0.02em;
}

.tab-button:hover {
    color: var(--accent-green);
    background: var(--bg-tertiary);
}

.tab-button.active {
    color: var(--accent-green-bright);
    border-bottom-color: var(--accent-green-bright);
    text-shadow: 0 0 3px var(--accent-green-glow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Upload Area */
.upload-area {
    border: 1px dashed var(--border-dashed);
    border-radius: 0;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-tertiary);
}

.upload-area:hover {
    border-color: var(--accent-green);
    background: var(--bg-secondary);
    box-shadow: 0 0 10px var(--accent-green-glow);
}

.upload-area.dragover {
    border-color: var(--accent-green-bright);
    background: var(--bg-secondary);
    box-shadow: 0 0 15px var(--accent-green-glow);
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    opacity: 0.7;
}

.upload-text {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.file-input {
    display: none;
}

.file-info {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.file-info-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.file-info-item:last-child {
    margin-bottom: 0;
}

.file-info-item strong {
    color: var(--text-primary);
}

/* Input Groups */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.85rem;
    letter-spacing: 0.02em;
}

.hash-input,
.content-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0;
    font-size: 0.9rem;
    font-family: 'IBM Plex Mono', monospace;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all 0.2s;
}

.hash-input:focus,
.content-textarea:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 5px var(--accent-green-glow);
    background: var(--bg-secondary);
}

.registry-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0;
    font-size: 0.9rem;
    font-family: 'IBM Plex Mono', monospace;
    background: var(--bg-tertiary);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all 0.2s;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237ef9a9' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
    box-shadow: none;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    text-shadow: none;
    -webkit-text-shadow: none;
    -moz-text-shadow: none;
    filter: none;
    -webkit-filter: none;
    -moz-filter: none;
}

.registry-select::-webkit-appearance {
    -webkit-appearance: none;
    appearance: none;
}

.registry-select::-moz-appearance {
    -moz-appearance: none;
    appearance: none;
}

.registry-select:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 5px var(--accent-green-glow);
    background-color: var(--bg-secondary);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237ef9a9' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    -webkit-box-shadow: 0 0 5px var(--accent-green-glow);
    -moz-box-shadow: 0 0 5px var(--accent-green-glow);
}

.registry-select:hover {
    border-color: var(--accent-green);
    background-color: var(--bg-secondary);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237ef9a9' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

.registry-select option {
    background: var(--bg-tertiary);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.5rem;
    border: none;
    box-shadow: none;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
}

.content-textarea {
    resize: vertical;
    min-height: 200px;
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
}

.registry-selector {
    margin: 1.25rem 0;
}

.registry-selector label {
    display: block;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.85rem;
    letter-spacing: 0.02em;
}

/* Verify Button */
.verify-button {
    width: 100%;
    padding: 1rem;
    background: var(--bg-tertiary);
    color: var(--accent-green-bright);
    border: 1px solid var(--accent-green);
    font-size: 0.9rem;
    font-weight: 400;
    font-family: 'IBM Plex Mono', monospace;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    letter-spacing: 0.02em;
    text-shadow: var(--text-glow);
}

.verify-button:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--accent-green-bright);
    color: var(--accent-green-hover);
    box-shadow: 0 0 10px var(--accent-green-glow);
    text-shadow: 0 0 4px var(--accent-green-glow);
}

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

.button-loader {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(126, 249, 169, 0.3);
    border-top-color: var(--accent-green);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Results */
.results-section {
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed var(--border-dashed);
}

.result-header h3 {
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.status-badge {
    padding: 0.4rem 0.8rem;
    border: 1px solid;
    font-size: 0.8rem;
    font-weight: 400;
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.05em;
}

.status-badge.valid {
    background: transparent;
    border-color: var(--success-color);
    color: var(--success-color);
    text-shadow: 0 0 3px var(--accent-green-glow);
}

.status-badge.invalid {
    background: transparent;
    border-color: var(--error-color);
    color: var(--error-color);
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.result-label {
    font-weight: 400;
    color: var(--text-secondary);
    min-width: 120px;
    letter-spacing: 0.02em;
}

.result-value {
    text-align: right;
    font-family: 'IBM Plex Mono', monospace;
    word-break: break-all;
    color: var(--text-primary);
}

.hash-value {
    color: var(--accent-green);
    text-shadow: 0 0 2px var(--accent-green-glow);
}

/* Verdict Section */
.verdict-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-dashed);
}

.verdict-section h4 {
    font-size: 0.95rem;
    font-weight: 400;
    margin-bottom: 2rem;
    margin-top: 0;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.verdict-section .result-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.verdict-type {
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.verdict-type.verdict-human-authored {
    color: var(--success-color);
    text-shadow: 0 0 3px var(--accent-green-glow);
}

.verdict-type.verdict-human-approved {
    color: var(--accent-green);
    text-shadow: 0 0 2px var(--accent-green-glow);
}

.verdict-type.verdict-ai-assisted {
    color: #ffa500;
    text-shadow: 0 0 2px rgba(255, 165, 0, 0.3);
}

.verdict-type.verdict-indeterminate {
    color: var(--text-secondary);
}

/* PAV Ontology Section */
.pav-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-dashed);
}

.pav-section h4 {
    font-size: 0.95rem;
    font-weight: 400;
    margin-bottom: 2rem;
    margin-top: 0;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.pav-subsection {
    margin-bottom: 2.5rem;
}

.pav-subsection:last-child {
    margin-bottom: 0;
}

.pav-subsection h5 {
    font-size: 0.85rem;
    font-weight: 400;
    margin-bottom: 1.25rem;
    margin-top: 0;
    color: var(--accent-green);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    padding-bottom: 0;
}

/* Merkle & Anchors Sections */
.merkle-section,
.anchors-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-dashed);
}

.merkle-section h4,
.anchors-section h4 {
    font-size: 0.95rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    margin-top: 0;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.proof-path {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 200px;
    overflow-y: auto;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
}

.proof-path-item {
    padding: 0.4rem 0.6rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.anchors-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.anchor-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-left: 2px solid var(--accent-green);
}

.anchor-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.anchor-chain {
    font-weight: 400;
    color: var(--text-primary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.anchor-link {
    color: var(--accent-green);
    text-decoration: none;
    font-size: 0.8rem;
    border-bottom: 1px dotted var(--accent-green);
    transition: color 0.2s;
}

.anchor-link:hover {
    color: var(--accent-green-hover);
    border-bottom-color: var(--accent-green-hover);
}

.anchor-tx {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
    word-break: break-all;
}

/* Error Section */
.error-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-dashed);
}

.error-message {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-left: 2px solid var(--error-color);
    border: 1px solid var(--border-color);
    border-left: 2px solid var(--error-color);
    color: var(--error-color);
    font-size: 0.85rem;
    font-family: 'IBM Plex Mono', monospace;
}

/* Info Card */
.info-card h3 {
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.info-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.info-list li {
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--border-dashed);
    font-size: 0.85rem;
    line-height: 1.8;
}

.info-list li:last-child {
    border-bottom: none;
}

.info-list strong {
    color: var(--accent-green);
    font-weight: 400;
}

.privacy-note {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-left: 2px solid var(--accent-green);
    border: 1px solid var(--border-color);
    border-left: 2px solid var(--accent-green);
    font-size: 0.85rem;
    color: var(--text-primary);
    font-family: 'IBM Plex Mono', monospace;
}

.privacy-note strong {
    color: var(--accent-green);
}

/* Footer */
footer {
    text-align: left;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-dashed);
    color: var(--text-secondary);
    font-size: 0.8rem;
}

footer p {
    margin-bottom: 0.5rem;
}

footer a {
    color: var(--accent-green);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-green);
    transition: color 0.2s;
}

footer a:hover {
    color: var(--accent-green-hover);
    border-bottom-color: var(--accent-green-hover);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 0;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-green);
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 640px) {
    body {
        padding: 6vw;
        font-size: 14px;
    }

    .header-content h1 {
        font-size: 1.5rem;
    }

    .verification-card,
    .info-card,
    .result-card {
        padding: 1.5rem;
    }

    .verification-tabs {
        flex-wrap: wrap;
    }

    .result-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .result-label {
        min-width: auto;
    }

    .result-value {
        text-align: left;
    }
}

/* Content Page Styles */
.content-section {
    margin-bottom: 2rem;
}

.content-section p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-section a {
    color: var(--accent-green);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-green);
    transition: color 0.2s;
}

.content-section a:hover {
    color: var(--accent-green-hover);
    border-bottom-color: var(--accent-green-hover);
}

.content-section h2,
.content-section h3 {
    color: var(--text-primary);
    font-weight: 400;
    margin-top: 2rem;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.content-section h2 {
    font-size: 1.2rem;
    border-bottom: 1px dashed var(--border-dashed);
    padding-bottom: 0.5rem;
}

.content-section h3 {
    font-size: 1rem;
    color: var(--accent-green);
}

.content-section code {
    background: var(--bg-tertiary);
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--border-color);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9em;
    color: var(--accent-green);
}

.content-section pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 1rem;
    overflow-x: auto;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    margin: 1rem 0;
}

.content-section blockquote {
    border-left: 2px solid var(--accent-green);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    font-style: italic;
}