/* ============================================================================
   main.css — layout, components, timeline, lookups, preview, responsive.
   Relies on the colour tokens defined in themes.css.
   ============================================================================ */


/* --------------------------------------------------------------------------
   Base layout
   -------------------------------------------------------------------------- */

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --------------------------------------------------------------------------
   Theme picker
   -------------------------------------------------------------------------- */

.theme-picker {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 6px 10px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.theme-picker-icon {
    color: var(--accent);
    flex-shrink: 0;
}

#themeSelect {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    padding-right: 4px;
    outline: none;
}

#themeSelect option {
    background: var(--card-bg);
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

header {
    text-align: center;
    color: var(--header-text);
    margin-bottom: 40px;
    margin-top: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Input section
   -------------------------------------------------------------------------- */

.input-section {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px var(--shadow-color);
    margin-bottom: 30px;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.button-group {
    display: flex;
    gap: 10px;
}

.paste-btn {
    flex: 1;
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 15px 30px;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}

.paste-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--shadow-color);
    filter: brightness(1.05);
}

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

.toggle-btn {
    background: var(--toggle-bg);
    border: 1px solid var(--toggle-border);
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
}

.toggle-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.toggle-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--button-text);
}

.textbox-container {
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s, margin-top 0.3s;
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

.textbox-container.visible {
    max-height: 500px;
    opacity: 1;
    margin-top: 20px;
}

.textbox-container.hidden {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

#headersInput {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--code-font);
    font-size: 0.9rem;
    resize: vertical;
    margin-bottom: 15px;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#headersInput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--shadow-color);
}

.textbox-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.analyze-btn {
    background: var(--accent);
    color: var(--button-text);
    border: none;
    padding: 12px 25px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, filter 0.2s;
}

.analyze-btn:hover {
    background: var(--accent-strong);
}

.clear-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.clear-btn:hover {
    border-color: var(--fail-border);
    color: var(--fail-border);
}

/* --------------------------------------------------------------------------
   Results
   -------------------------------------------------------------------------- */

.results {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.results.hidden {
    display: none;
}

.results-toolbar {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.ghost-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.ghost-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.security-summary,
.sender-info,
.relay-timeline,
.all-headers {
    margin-bottom: 30px;
}

.all-headers {
    margin-bottom: 0;
}

.security-summary h2,
.sender-info h2,
.relay-timeline h2,
.all-headers h2 {
    color: var(--accent);
    margin-bottom: 15px;
    font-size: 1.4rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.security-checks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.security-check {
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--neutral-border);
    background: var(--neutral-bg);
    transition: background 0.3s ease;
}

.security-check.pass {
    border-left-color: var(--pass-border);
    background: var(--pass-bg);
}

.security-check.fail {
    border-left-color: var(--fail-border);
    background: var(--fail-bg);
}

.security-check.warning {
    border-left-color: var(--warn-border);
    background: var(--warn-bg);
}

.security-check.neutral {
    border-left-color: var(--neutral-border);
    background: var(--neutral-bg);
}

.check-label {
    font-weight: 600;
    margin-bottom: 5px;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.02em;
    color: var(--text-header);
}

.check-value {
    font-size: 0.95rem;
    color: var(--text-secondary);
    word-break: break-word;
}

/* Sender info */
.info-grid {
    display: grid;
    gap: 15px;
}

.info-item {
    padding: 12px 15px;
    background: var(--input-bg);
    border-radius: 8px;
    border-left: 3px solid var(--accent);
    transition: background 0.3s ease;
}

.info-item.important {
    background: var(--important-bg);
    border-left-color: var(--important-border);
}

.info-item.suspicious {
    background: var(--suspicious-bg);
    border-left-color: var(--suspicious-border);
}

.info-label {
    font-weight: 700;
    color: var(--text-header);
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.info-value {
    color: var(--text-secondary);
    word-break: break-all;
}

.info-value.bold {
    font-weight: 700;
    color: var(--text-header);
}

/* All headers */
.headers-list {
    display: grid;
    gap: 10px;
}

.header-item {
    padding: 10px 15px;
    background: var(--input-bg);
    border-radius: 6px;
    font-family: var(--code-font);
    font-size: 0.85rem;
    word-break: break-word;
    transition: background 0.3s ease;
}

.header-item.important {
    background: var(--important-bg);
    border-left: 3px solid var(--important-border);
}

.header-item.suspicious {
    background: var(--suspicious-bg);
    border-left: 3px solid var(--suspicious-border);
}

.header-name {
    font-weight: 700;
    color: var(--text-header);
    margin-right: 10px;
}

.header-value {
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Empty state & footer
   -------------------------------------------------------------------------- */

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-header);
}

.empty-state.hidden {
    display: none;
}

.empty-state svg {
    opacity: 0.6;
    margin-bottom: 20px;
    color: var(--accent);
}

.empty-state p {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.empty-state .hint {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.page-footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   Timeline
   -------------------------------------------------------------------------- */

.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline-item {
    position: relative;
    padding: 20px 20px 20px 50px;
    margin-bottom: 20px;
    background: var(--input-bg);
    border-radius: 8px;
    border-left: 4px solid var(--accent);
    transition: background 0.3s ease, transform 0.2s ease;
}

.timeline-item:hover {
    transform: translateX(5px);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 25px;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: 3px solid var(--card-bg);
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 25px;
    top: 45px;
    width: 2px;
    height: calc(100% + 20px);
    background: var(--accent);
    opacity: 0.3;
}

.timeline-item.first-hop {
    border-left-color: var(--pass-border);
    background: var(--pass-bg);
}

.timeline-item.first-hop::before {
    background: var(--pass-border);
    width: 20px;
    height: 20px;
    left: 16px;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 10px;
}

.timeline-number {
    display: inline-block;
    background: var(--accent);
    color: var(--button-text);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.timeline-server {
    font-weight: 700;
    color: var(--text-header);
    font-size: 1rem;
    margin-bottom: 8px;
    word-break: break-all;
}

.timeline-details {
    display: grid;
    gap: 5px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: var(--code-font);
}

.timeline-detail-row {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 10px;
}

.timeline-detail-label {
    font-weight: 600;
    color: var(--text-header);
}

.timeline-detail-value {
    word-break: break-all;
}

.timeline-empty {
    color: var(--text-secondary);
    padding: 20px;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translate(-50%, 20px);
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent);
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 8px 24px var(--shadow-color);
    font-size: 0.9rem;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 2000;
    max-width: 90vw;
}

.toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

.toast.error {
    border-left-color: var(--fail-border);
}

.toast.success {
    border-left-color: var(--pass-border);
}

/* --------------------------------------------------------------------------
   Input hints, drag & drop, example link
   -------------------------------------------------------------------------- */

.input-hint {
    margin-top: 14px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.input-hint code {
    font-family: var(--code-font);
    background: var(--input-bg);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

.link-btn {
    background: none;
    border: none;
    color: var(--accent);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

#dropZone.drag-over {
    outline: 2px dashed var(--accent);
    outline-offset: 4px;
}

/* --------------------------------------------------------------------------
   Section notes / tags
   -------------------------------------------------------------------------- */

.section-tag {
    display: inline-block;
    vertical-align: middle;
    font-size: 0.65em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--button-text);
    background: var(--accent);
    padding: 2px 8px;
    border-radius: 999px;
    margin-left: 8px;
}

.section-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
}

.investigation.hidden,
.attachments.hidden,
.email-preview.hidden {
    display: none;
}

.investigation,
.attachments,
.email-preview {
    margin-bottom: 30px;
}

/* --------------------------------------------------------------------------
   External lookup cards
   -------------------------------------------------------------------------- */

.investigation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.lookup-card {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 16px;
}

.lookup-title {
    font-weight: 700;
    color: var(--text-header);
    margin-bottom: 10px;
    word-break: break-all;
    font-family: var(--code-font);
    font-size: 0.9rem;
}

.lookup-type {
    display: inline-block;
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1px 6px;
    margin-right: 6px;
}

.lookup-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.lookup-link {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 4px 10px;
    text-decoration: none;
    transition: all 0.15s ease;
}

.lookup-link:hover {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--button-text);
}

.lookup-link.vt {
    color: var(--warn-border);
}

.lookup-link.vt:hover {
    background: var(--warn-border);
    border-color: var(--warn-border);
    color: var(--button-text);
}

button.lookup-link {
    font: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    background: transparent;
    cursor: pointer;
}

button.lookup-link:disabled {
    opacity: 0.5;
    cursor: default;
}

.lookup-type.warn {
    color: var(--warn-border);
    border-color: var(--warn-border);
}

.lookup-note {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin: 6px 0 0;
    word-break: break-word;
    line-height: 1.5;
}

.icann-card {
    border-left: 3px solid var(--warn-border);
}

/* --------------------------------------------------------------------------
   Attachments
   -------------------------------------------------------------------------- */

.attachments-list {
    display: grid;
    gap: 12px;
}

.attachment-item {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent);
    border-radius: 8px;
    padding: 12px 15px;
}

.attachment-name {
    font-weight: 700;
    color: var(--text-header);
    word-break: break-all;
}

.attachment-meta {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 4px 0;
}

.attachment-hash {
    font-size: 0.8rem;
    color: var(--text-secondary);
    word-break: break-all;
    font-family: var(--code-font);
}

.attachment-hash code {
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Message body preview
   -------------------------------------------------------------------------- */

.preview-warning {
    background: var(--warn-bg);
    border-left: 4px solid var(--warn-border);
    color: var(--text-primary);
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.preview-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.ghost-btn.danger {
    color: var(--fail-border);
    border-color: var(--fail-border);
}

.ghost-btn.danger:hover {
    background: var(--fail-border);
    color: var(--button-text);
}

.ghost-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.preview-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: #ffffff;
}

.preview-frame {
    width: 100%;
    min-height: 320px;
    border: none;
    background: #ffffff;
    display: block;
}

.preview-text {
    margin: 0;
    padding: 15px;
    font-family: var(--code-font);
    font-size: 0.85rem;
    color: var(--text-primary);
    background: var(--input-bg);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 400px;
    overflow: auto;
}

/* --------------------------------------------------------------------------
   Timeline summary
   -------------------------------------------------------------------------- */

.timeline-summary {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 15px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.timeline-summary strong {
    color: var(--text-header);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
    header {
        margin-top: 60px;
    }

    header h1 {
        font-size: 2rem;
    }

    .timeline-item {
        padding-left: 40px;
    }

    .timeline-item::before {
        left: 12px;
        width: 12px;
        height: 12px;
    }

    .timeline-item:not(:last-child)::after {
        left: 17px;
    }

    .timeline-detail-row {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .input-section,
    .results {
        padding: 20px;
    }

    .security-checks {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}