/**
 * CBD COA Library - Frontend Styles
 * Premium 2025 Design System v2.0
 * Clean, Calm, Professional
 *
 * @package CBD_COA_Library
 * @since 1.0.4
 */

/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
    /* Brand Primary Palette */
    --coa-primary: #89AF8B;
    --coa-primary-light: #acc7ae;
    --coa-primary-lighter: #eef4ef;
    --coa-primary-dark: #6a8f6c;

    /* Brand Secondary Palette */
    --coa-secondary: #8a7d75;
    --coa-secondary-light: #bfaa97;
    --coa-secondary-dark: #806f67;

    /* CTA Color */
    --coa-cta: #ff934f;

    /* Neutral Palette */
    --coa-white: #ffffff;
    --coa-surface: #eef4ef;
    --coa-border: rgba(0, 0, 0, 0.08);
    --coa-border-strong: rgba(0, 0, 0, 0.12);

    /* Text Colors */
    --coa-text: #000000;
    --coa-text-secondary: #4e4e4e;
    --coa-text-muted: #705222;

    /* Semantic Colors */
    --coa-success: #89AF8B;
    --coa-success-bg: #eef4ef;
    --coa-warning: #705222;
    --coa-warning-bg: rgba(112, 82, 34, 0.08);

    /* Typography Scale - Desktop minimum 14px */
    --font-sm: 14px;
    --font-base: 15px;
    --font-md: 17px;
    --font-lg: 22px;
    --font-xl: 28px;

    /* Font Family */
    --font-family: 'canada-type-gibson', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* Spacing Scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 100px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --duration: 200ms;
}

/* ==========================================================================
   Base
   ========================================================================== */

.coa {
    max-width: 880px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-5) var(--space-8);
    font-family: var(--font-family);
    font-size: var(--font-base);
    font-weight: 400;
    line-height: 1.6;
    color: var(--coa-text-secondary);
    -webkit-font-smoothing: antialiased;
}

.coa h1 {
    font-size: var(--font-xl);
    font-weight: 500;
    color: var(--coa-text);
    line-height: 1.25;
    margin: 0;
    letter-spacing: -0.02em;
}

.coa h2 {
    font-size: var(--font-lg);
    font-weight: 500;
    color: var(--coa-text);
    line-height: 1.3;
    margin: 0 0 var(--space-4);
}

.coa h3 {
    font-size: var(--font-md);
    font-weight: 500;
    color: var(--coa-text);
    margin: 0 0 var(--space-2);
}

.coa p {
    margin: 0 0 var(--space-4);
}

.coa a {
    color: var(--coa-primary);
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}

.coa a:hover {
    color: var(--coa-primary-dark);
}

/* ==========================================================================
   Buttons - Sleek & Consistent
   ========================================================================== */

.coa button,
.coa .coa-btn {
    appearance: none;
    font-family: var(--font-family);
    cursor: pointer;
    border: none;
    background: none;
}

.coa-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration) var(--ease);
    white-space: nowrap;
}

.coa-btn.primary {
    background: var(--coa-primary);
    color: var(--coa-white);
    box-shadow: var(--shadow-sm);
}

.coa-btn.primary:hover {
    background: var(--coa-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.coa-btn.primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.coa-btn.secondary {
    background: var(--coa-white);
    color: var(--coa-text-secondary);
    border: 2px solid #d1d5db;
    box-shadow: var(--shadow-sm);
}

.coa-btn.secondary:hover {
    background: var(--coa-surface);
    border-color: var(--coa-primary);
    color: var(--coa-primary-dark);
    transform: translateY(-1px);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.coa-hero {
    background: var(--coa-white);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-5);
    align-items: start;
    margin-bottom: var(--space-6);
    border: 1px solid var(--coa-border);
    box-shadow: var(--shadow-sm);
}

.coa-hero-media {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--coa-surface);
    border: 1px solid var(--coa-border);
}

.coa-hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration) var(--ease);
}

.coa-hero-media:hover img {
    transform: scale(1.03);
}

/* Hero clickable links */
a.coa-hero-media {
    text-decoration: none;
}

.coa-hero-title-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}

.coa-hero-title-link:hover {
    color: var(--coa-primary);
}

.coa-context-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--coa-text-muted);
    margin: 0 0 var(--space-1);
}

.coa-context-label::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--coa-primary);
}

.coa-status {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin: var(--space-3) 0;
}

.coa-status > div {
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text-secondary);
}

.coa-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--coa-success-bg);
    color: var(--coa-success);
    border-radius: var(--radius-full);
    font-size: var(--font-sm);
    font-weight: 500;
    width: fit-content;
}

.coa-key-metrics {
    list-style: none;
    padding: 0;
    margin: var(--space-4) 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.coa-key-metrics li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-sm);
    color: var(--coa-text-secondary);
}

.coa-key-metrics li::before {
    content: '✓';
    color: var(--coa-success);
    font-weight: 600;
    font-size: var(--font-sm);
}

.coa-hero-downloads,
.coa-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.coa-btn-product::before {
    content: '→';
    font-size: 16px;
    font-weight: 600;
}

.coa-details-line {
    margin-top: var(--space-3);
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
}

.coa-progress {
    display: none;
}

/* ==========================================================================
   Summary Card
   ========================================================================== */

.coa-summary-card {
    background: var(--coa-white);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    border: 1px solid var(--coa-border);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-6);
}

.coa-summary-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
    flex-wrap: wrap;
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--coa-border);
}

.coa-summary-header h2 {
    margin: 0;
}

.coa-summary-subtitle {
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
    margin-top: var(--space-1);
}

.coa-summary-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    margin: var(--space-5) 0;
}

.coa-summary-metrics > div {
    padding: var(--space-3) var(--space-4);
    background: var(--coa-surface);
    border-radius: var(--radius-sm);
    transition: background var(--duration) var(--ease);
}

.coa-summary-metrics > div:hover {
    background: var(--coa-primary-lighter);
}

/* Primary metrics (CBD & THC) */
.coa-summary-metrics > div:nth-child(1),
.coa-summary-metrics > div:nth-child(2) {
    background: var(--coa-primary-lighter);
    border: 1px solid rgba(137, 175, 139, 0.15);
}

.coa-summary-metrics > div:nth-child(1) span,
.coa-summary-metrics > div:nth-child(2) span {
    font-size: var(--font-md);
    font-weight: 600;
}

.coa-summary-metrics > div strong {
    display: block;
    font-size: var(--font-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--coa-text-muted);
    margin-bottom: var(--space-1);
}

.coa-summary-metrics > div span {
    display: block;
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text);
    font-variant-numeric: tabular-nums;
}

.coa-uncertainty-note {
    margin-top: 0;
    padding: var(--space-3) var(--space-4);
    background: var(--coa-warning-bg);
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
    color: var(--coa-text-secondary);
    line-height: 1.5;
}

/* ==========================================================================
   How-To Section
   ========================================================================== */

.coa-howto {
    margin: var(--space-7) 0;
}

.coa-howto details {
    background: var(--coa-warning-bg);
    border: 1px solid rgba(112, 82, 34, 0.15);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.coa-howto summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    gap: var(--space-3);
    align-items: center;
    padding: var(--space-4);
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text);
    transition: background var(--duration) var(--ease);
}

.coa-howto summary:hover {
    background: rgba(112, 82, 34, 0.08);
}

/* Hide ALL browser default details markers - comprehensive fix */
.coa-howto summary,
.coa-howto details > summary,
.coa .coa-howto summary {
    list-style: none !important;
    list-style-type: none !important;
}

.coa-howto summary::marker,
.coa-howto summary::-webkit-details-marker,
.coa-howto summary::-moz-list-bullet,
details.coa-howto summary::marker,
.coa .coa-howto summary::marker {
    display: none !important;
    content: '' !important;
    font-size: 0 !important;
    width: 0 !important;
    height: 0 !important;
}

/* Question mark icon */
.coa-howto summary > svg:first-child {
    flex-shrink: 0;
    color: var(--coa-warning);
}

/* Chevron icon - pushed to right */
.coa-howto-chevron {
    margin-left: auto;
    flex-shrink: 0;
    color: var(--coa-warning);
    transition: transform var(--duration) var(--ease);
}

.coa-howto details[open] .coa-howto-chevron {
    transform: rotate(180deg);
}

.coa-howto .content {
    padding: 0 var(--space-5) var(--space-4);
}

.coa-howto ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.coa-howto li {
    padding: var(--space-3) 0;
    padding-left: var(--space-5);
    position: relative;
    font-size: var(--font-sm);
    color: var(--coa-text-secondary);
    border-bottom: 1px solid rgba(112, 82, 34, 0.1);
}

.coa-howto li:last-child {
    border-bottom: none;
}

.coa-howto li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--coa-warning);
    font-weight: 500;
}

.coa-howto li strong {
    color: var(--coa-text);
}

/* Definition list styling for howto */
.coa-howto-list {
    margin: var(--space-4) 0 0;
    padding: 0;
}

.coa-howto-item {
    padding: var(--space-4) 0;
    padding-left: var(--space-6);
    position: relative;
    border-bottom: 1px solid rgba(112, 82, 34, 0.15);
}

.coa-howto-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.coa-howto-item:first-child {
    padding-top: 0;
}

.coa-howto-item::before {
    content: '→';
    position: absolute;
    left: 0;
    top: var(--space-4);
    color: var(--coa-warning);
    font-weight: 600;
    font-size: var(--font-base);
}

.coa-howto-item:first-child::before {
    top: 0;
}

.coa-howto-item dt {
    font-size: var(--font-base);
    font-weight: 600;
    color: var(--coa-text);
    margin-bottom: var(--space-2);
}

.coa-howto-item dd {
    font-size: var(--font-base);
    color: var(--coa-text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* ==========================================================================
   Controls - Unit Toggle & Filter Chips
   ========================================================================== */

.coa-section {
    margin: var(--space-7) 0;
}

.coa-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
    align-items: flex-start;
    margin-bottom: var(--space-5);
    /* Sticky positioning on scroll - accounts for typical WP header */
    position: sticky;
    top: var(--wp-admin--admin-bar--height, 0px);
    z-index: 50;
    background: var(--coa-white);
    padding: var(--space-3) var(--space-4);
    margin: 0 calc(-1 * var(--space-4)) var(--space-5);
    border-bottom: 1px solid var(--coa-border);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.coa-control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.coa-control-label {
    font-size: var(--font-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--coa-text-muted);
}

.coa-unit-toggle {
    display: inline-flex;
    background: var(--coa-surface);
    border-radius: var(--radius-md);
    padding: 3px;
    border: 1px solid var(--coa-border);
}

.coa-unit-toggle button {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--duration) var(--ease);
}

.coa-unit-toggle button:hover:not(.active) {
    color: var(--coa-text-secondary);
}

.coa-unit-toggle button.active,
.coa-unit-toggle button[aria-pressed="true"] {
    background: var(--coa-white) !important;
    color: var(--coa-text);
    box-shadow: var(--shadow-sm);
}

.coa-toggle-note {
    margin: var(--space-3) 0 var(--space-5);
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
}

.coa-chip-row {
    display: inline-flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    background: var(--coa-surface);
    border-radius: var(--radius-md);
    padding: 4px;
    border: 1px solid var(--coa-border-strong);
}

/* Filter chips - strong overrides against theme */
.coa .coa-chip,
.coa .coa-chip-row .coa-chip,
.coa button.coa-chip,
main.coa .coa-chip {
    display: inline-flex !important;
    align-items: center !important;
    padding: 8px 16px !important;
    font-size: var(--font-sm) !important;
    font-weight: 500 !important;
    color: #4a4a4a !important;
    background: #ffffff !important;
    background-color: #ffffff !important;
    border: 2px solid #d1d5db !important;
    border-radius: var(--radius-sm) !important;
    transition: all var(--duration) var(--ease) !important;
    cursor: pointer !important;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05) !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.coa .coa-chip:hover:not(.active) {
    color: var(--coa-text) !important;
    background: var(--coa-surface) !important;
    border-color: var(--coa-border-strong);
}

.coa .coa-chip.active,
.coa .coa-chip[aria-pressed="true"] {
    background: var(--coa-primary) !important;
    color: var(--coa-white) !important;
    border-color: var(--coa-primary-dark) !important;
    box-shadow: 0 2px 4px rgba(137, 175, 139, 0.3);
    font-weight: 600;
}

/* ==========================================================================
   Table - Clean Data Presentation
   ========================================================================== */

.coa-table-wrap {
    border-radius: var(--radius-md);
    border: 1px solid var(--coa-border-strong);
    background: var(--coa-white);
    overflow: hidden;
}

.coa table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-base);
}

.coa thead th {
    background: var(--coa-surface);
    padding: var(--space-3) var(--space-4);
    text-align: left;
    font-size: var(--font-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--coa-text-muted);
    border-bottom: 2px solid var(--coa-border-strong);
}

.coa tbody td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--coa-border);
    color: var(--coa-text-secondary);
    vertical-align: middle;
    font-size: var(--font-base);
}

.coa tbody tr:last-child td {
    border-bottom: none;
}

.coa tbody tr {
    transition: background var(--duration) var(--ease);
}

/* Zebra striping - subtle alternating rows */
.coa tbody tr:nth-child(even) {
    background: var(--coa-surface);
}

.coa tbody tr:hover {
    background: var(--coa-primary-lighter);
    border-left: 3px solid var(--coa-primary);
}

/* Green accent border on hover - using border instead of pseudo-element */
.coa tbody tr {
    border-left: 3px solid transparent;
    transition: background var(--duration) var(--ease), border-left-color var(--duration) var(--ease);
}

/* Table column widths for consistent alignment */
.coa table th:first-child,
.coa table td:first-child {
    width: 80px;
}

.coa table th:nth-child(2),
.coa table td:nth-child(2) {
    width: auto;
}

.coa table th:nth-child(3),
.coa table td:nth-child(3) {
    width: 120px;
    text-align: right;
}

.coa table th:nth-child(4),
.coa table td:nth-child(4) {
    width: 100px;
    text-align: right;
}

.coa th.value,
.coa td.value {
    text-align: right;
}

.coa td.value {
    font-variant-numeric: tabular-nums;
}

/* Unit column */
.coa-unit {
    color: var(--coa-text-muted);
    font-size: var(--font-sm);
}

/* Code column - same font as rest of table, neutral color (NOT red!) */
.coa table td:first-child code,
.coa table tbody td:first-child code,
.coa .coa-table-wrap table td code,
main.coa table td code,
.coa table td code {
    font-size: 14px !important;
    color: #4a4a4a !important;
    background: transparent !important;
    background-color: transparent !important;
    padding: 0 !important;
    border-radius: 0 !important;
    font-family: var(--font-family) !important;
    border: none !important;
    text-decoration: none !important;
}

.coa-badge-ok {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--coa-success-bg);
    color: var(--coa-success);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-sm);
    font-variant-numeric: tabular-nums;
}

.coa-badge-nd {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--coa-surface);
    color: var(--coa-text-muted);
    border-radius: var(--radius-full);
    font-size: var(--font-sm);
    border: 1px solid var(--coa-border);
}

.coa-table-note {
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--coa-surface);
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text-secondary);
    line-height: 1.5;
}

/* ==========================================================================
   Mobile Cards
   ========================================================================== */

.coa-cards {
    display: none;
}

.coa-card {
    background: var(--coa-white);
    border: 1px solid var(--coa-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    transition: all var(--duration) var(--ease);
}

.coa-card:active {
    background: var(--coa-primary-lighter);
}

.coa-card h3 {
    font-size: var(--font-sm);
    margin: 0;
}

.coa-card small {
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
}

.coa-card-value {
    font-size: var(--font-md);
    font-weight: 600;
    margin: var(--space-2) 0;
}

.coa-card-unit {
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
}

/* ==========================================================================
   Chart
   ========================================================================== */

.coa-chart {
    margin-top: var(--space-6);
    padding: var(--space-5);
    background: var(--coa-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--coa-border);
}

.coa-chart h3 {
    margin: 0 0 var(--space-1);
    font-size: var(--font-md);
    font-weight: 600;
}

.coa-chart-subtitle {
    margin: 0 0 var(--space-4);
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
}

.coa-chart-bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.coa-chart-bar:last-child {
    margin-bottom: 0;
}

.coa-chart-bar span {
    min-width: 110px;
    font-size: var(--font-sm);
    color: var(--coa-text-secondary);
}

.coa-chart-track {
    flex: 1;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--coa-surface);
    position: relative;
    overflow: hidden;
}

.coa-chart-fill {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 0;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--coa-primary-light), var(--coa-primary));
    /* No transition here - added via JS .animated class for scroll-triggered animation */
}

.coa-chart-bar strong {
    min-width: 55px;
    text-align: right;
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text);
    font-family: var(--font-mono);
}

/* ==========================================================================
   404 Page
   ========================================================================== */

.coa-404 {
    background: var(--coa-white);
    border: 1px solid var(--coa-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8) var(--space-6);
    text-align: center;
    max-width: 420px;
    margin: 0 auto;
}

.coa-404 h1 {
    margin: 0 0 var(--space-3);
    font-size: var(--font-lg);
}

.coa-404 p {
    margin: 0 0 var(--space-5);
    color: var(--coa-text-muted);
}

.coa-404 a {
    display: inline-flex;
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    background: var(--coa-primary);
    color: var(--coa-white);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration) var(--ease);
}

.coa-404 a:hover {
    background: var(--coa-primary-dark);
    transform: translateY(-1px);
}

/* ==========================================================================
   Version Marker
   ========================================================================== */

.coa-version-marker {
    margin-top: var(--space-7);
    padding-top: var(--space-4);
    border-top: 1px solid var(--coa-border);
    text-align: center;
    font-size: 10px;
    color: var(--coa-text-muted);
    opacity: 0.5;
    letter-spacing: 0.02em;
}

/* ==========================================================================
   Responsive - Tablet
   ========================================================================== */

@media (max-width: 768px) {
    .coa {
        padding: var(--space-5) var(--space-4) var(--space-7);
    }

    .coa-hero {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        padding: var(--space-4);
        text-align: center;
    }

    .coa-hero-media {
        width: 100px;
        height: 100px;
        margin: 0 auto;
    }

    .coa-context-label {
        justify-content: center;
    }

    .coa-key-metrics {
        align-items: center;
    }

    .coa-hero-downloads {
        justify-content: center;
    }

    .coa-hero-downloads .coa-btn {
        width: 100%;
        max-width: 240px;
    }

    .coa-summary-card {
        padding: var(--space-4);
    }

    .coa-summary-metrics {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-2);
    }

    .coa-controls {
        flex-direction: column;
        gap: var(--space-3);
    }

    .coa-unit-toggle,
    .coa-chip-row {
        width: 100%;
        justify-content: center;
    }
}

/* ==========================================================================
   Responsive - Mobile (smaller fonts allowed)
   ========================================================================== */

@media (max-width: 640px) {
    /* Mobile typography - smaller sizes allowed */
    .coa {
        --font-sm: 13px;
        --font-base: 14px;
        --font-md: 16px;
        --font-lg: 20px;
        --font-xl: 24px;
    }

    .coa {
        font-size: var(--font-base);
    }

    .coa h1 {
        font-size: var(--font-lg);
    }

    .coa h2 {
        font-size: var(--font-md);
    }

    .coa-table-wrap {
        display: none;
    }

    .coa-cards {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }

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

    .coa-unit-toggle button,
    .coa .coa-chip {
        padding: var(--space-2) var(--space-3);
        font-size: var(--font-sm);
    }

    .coa-chart-bar span {
        min-width: 70px;
    }

    .coa-chart-bar strong {
        min-width: 50px;
    }
}

/* ==========================================================================
   Responsive - Small Mobile
   ========================================================================== */

@media (max-width: 420px) {
    /* Even smaller typography for very small screens */
    .coa {
        --font-sm: 12px;
        --font-base: 13px;
        --font-md: 15px;
        --font-lg: 18px;
        --font-xl: 22px;
    }

    .coa {
        padding: var(--space-4) var(--space-3) var(--space-6);
    }

    .coa-hero {
        padding: var(--space-4);
    }

    .coa-summary-metrics {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }

    .coa-cards {
        grid-template-columns: 1fr;
    }

    .coa-unit-toggle,
    .coa-chip-row {
        flex-wrap: wrap;
    }

    .coa-chart {
        padding: var(--space-4);
    }

    .coa-chart-bar {
        flex-wrap: wrap;
        gap: var(--space-2);
    }

    .coa-chart-bar span {
        width: 100%;
        min-width: auto;
    }

    .coa-chart-track {
        width: 100%;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .coa {
        max-width: none;
        padding: 0;
    }

    .coa-hero,
    .coa-summary-card,
    .coa-chart {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .coa-progress {
        display: none;
    }

    .coa-howto details {
        display: block;
    }

    .coa-btn {
        display: none;
    }

    .coa-cards {
        display: grid !important;
    }

    .coa-table-wrap {
        display: block !important;
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   Focus & Accessibility
   ========================================================================== */

.coa :focus-visible {
    outline: 2px solid var(--coa-primary);
    outline-offset: 2px;
}

.coa button:focus:not(:focus-visible),
.coa a:focus:not(:focus-visible) {
    outline: none;
}

@media (forced-colors: active) {
    .coa-badge,
    .coa-badge-ok,
    .coa-badge-nd,
    .coa-btn {
        border: 2px solid currentColor;
    }

    .coa-chart-fill {
        background: CanvasText;
    }
}

/* ==========================================================================
   Tooltip System
   ========================================================================== */

[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--coa-text);
    opacity: 0;
    visibility: hidden;
    transition: all 150ms var(--ease);
    z-index: 101;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-2) var(--space-3);
    background: var(--coa-text);
    color: var(--coa-white);
    font-size: var(--font-sm);
    font-weight: 400;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    max-width: 280px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: all 150ms var(--ease);
    z-index: 100;
    pointer-events: none;
}

[data-tooltip]:hover::before,
[data-tooltip]:hover::after,
[data-tooltip]:focus::before,
[data-tooltip]:focus::after {
    opacity: 1;
    visibility: visible;
}

/* Long tooltips wrap */
[data-tooltip-wrap]::after {
    white-space: normal;
    width: max-content;
}

/* Info icon button */
.coa-info {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    margin-left: var(--space-2);
    border-radius: 50%;
    background: var(--coa-white);
    border: 1px solid var(--coa-border);
    font-size: 10px;
    font-weight: 600;
    color: var(--coa-text-muted);
    cursor: help;
    transition: all var(--duration) var(--ease);
    vertical-align: middle;
    flex-shrink: 0;
}

.coa-info:hover {
    background: var(--coa-primary-lighter);
    border-color: var(--coa-primary-light);
    color: var(--coa-primary);
}

/* ==========================================================================
   Enhanced Download Button
   ========================================================================== */

.coa-btn.coa-btn-download {
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-base);
    gap: var(--space-3);
    background: #ff934f;
    border-color: #ff934f;
}

.coa-btn.coa-btn-download:hover {
    background: #e87f3a;
    border-color: #e87f3a;
}

.coa-btn.coa-btn-download::before {
    content: '↓';
    font-size: 18px;
    font-weight: 600;
}

@keyframes coa-pulse {
    0%, 100% { box-shadow: var(--shadow-sm), 0 0 0 0 rgba(255, 147, 79, 0.4); }
    50% { box-shadow: var(--shadow-sm), 0 0 0 8px rgba(255, 147, 79, 0); }
}

.coa-btn.coa-btn-download {
    animation: coa-pulse 2s ease-in-out 1;
    animation-delay: 0.5s;
}

/* ==========================================================================
   Enhanced Table Row Hover (simplified - no pseudo-element)
   ========================================================================== */

/* Hover is already defined in table section above */

/* ==========================================================================
   Chart Bar Animations & Hover
   ========================================================================== */

.coa-chart-fill.animated {
    transition: width 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.coa-chart-bar {
    cursor: default;
    transition: all var(--duration) var(--ease);
}

.coa-chart-bar:hover {
    transform: translateX(4px);
}

.coa-chart-bar:hover .coa-chart-fill {
    filter: brightness(1.1);
}

.coa-chart-bar:hover strong {
    color: var(--coa-primary);
}

/* ==========================================================================
   Copy to Clipboard Feedback
   ========================================================================== */

.coa-value {
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    position: relative;
}

.coa-value:hover {
    color: var(--coa-primary);
}

.coa-value.copied::after {
    content: '✓';
    position: absolute;
    right: -20px;
    color: var(--coa-success);
    font-weight: 600;
    animation: coa-copied 1s ease forwards;
}

@keyframes coa-copied {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
    100% { opacity: 0; transform: scale(1); }
}

/* ==========================================================================
   Micro-Animations on Hover
   ========================================================================== */

/* Summary metric cards - subtle lift on hover */
.coa-summary-metrics > div {
    transition: all var(--duration) var(--ease);
}

.coa-summary-metrics > div:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Badge pulse on hover */
.coa-badge {
    transition: all var(--duration) var(--ease);
}

.coa-badge:hover {
    transform: scale(1.02);
}

/* Hero media zoom is already defined - enhance it */
a.coa-hero-media:hover {
    box-shadow: var(--shadow-md);
}

/* Howto section expansion */
.coa-howto details[open] .content {
    animation: coa-slideDown 200ms var(--ease) forwards;
}

@keyframes coa-slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Filter chips - pop effect */
.coa .coa-chip {
    transition: all 150ms var(--ease);
}

.coa .coa-chip:active {
    transform: scale(0.96);
}

/* Unit toggle buttons - subtle feedback */
.coa-unit-toggle button {
    transition: all 150ms var(--ease);
}

.coa-unit-toggle button:active:not(.active) {
    transform: scale(0.96);
}

/* Table row hover handled with border-left in table section */

/* Mobile cards - touch feedback */
.coa-card {
    transition: all var(--duration) var(--ease);
}

.coa-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--coa-primary-light);
}

/* ==========================================================================
   THC Compliance Progress Indicator
   ========================================================================== */

.coa-thc-compliance {
    margin-top: var(--space-5);
    padding: var(--space-4) var(--space-4) var(--space-4) var(--space-5);
    background: linear-gradient(135deg, var(--coa-success-bg) 0%, rgba(137, 175, 139, 0.04) 100%);
    border-radius: var(--radius-md);
    border: 1px solid rgba(137, 175, 139, 0.15);
    border-left: 4px solid var(--coa-success);
    position: relative;
}

.coa-thc-compliance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.coa-thc-compliance-header strong {
    font-size: var(--font-sm);
    font-weight: 500;
    color: var(--coa-text-secondary);
}

.coa-thc-compliance-header span {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--coa-success);
}

.coa-thc-compliance-header span.warning {
    color: var(--coa-warning);
}

.coa-thc-progress-track {
    height: 10px;
    background: var(--coa-border);
    border-radius: var(--radius-full);
    position: relative;
    overflow: hidden;
}

.coa-thc-progress-fill {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--coa-success), #7bc07e);
    transition: width 600ms var(--ease);
}

.coa-thc-progress-fill.warning {
    background: linear-gradient(90deg, var(--coa-warning), #ddb84a);
}

/* Legal limit marker (dynamic based on setting) */
.coa-thc-progress-limit {
    position: absolute;
    right: 0;
    top: -4px;
    bottom: -4px;
    width: 2px;
    background: var(--coa-text-muted);
}

.coa-thc-progress-limit::after {
    content: attr(data-limit);
    position: absolute;
    right: 0;
    top: -20px;
    font-size: 10px;
    color: var(--coa-text-muted);
    white-space: nowrap;
}

.coa-thc-compliance-note {
    margin-top: var(--space-2);
    font-size: var(--font-sm);
    color: var(--coa-text-muted);
}