/* ─── Soundcheck Design System ──────────────────────────────────────── */
/* Centre Channel OS · Diagnostic Intelligence Platform                  */

:root {
    /* Base tokens (CC OS) */
    --bg: #f5f2eb;
    --bg-secondary: #ebe6db;
    --bg-tertiary: #e8e6e2;
    --border: #d8d6d0;
    --text: #0a0a0a;
    --text-secondary: #4a4a4a;
    --text-muted: #6b6b6b;
    --text-placeholder: #9a9a9a;
    --brass: #b8976a;
    --brass-light: #d4b896;
    --brass-dark: #8a7048;
    --error: #dc5050;
    --success: #4a9d6b;
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;
    --transition-base: 250ms ease;
    --transition-fast: 150ms ease;

    /* Data visualisation tokens (Soundcheck) */
    --viz-client: #b8976a;
    --viz-benchmark: #0a0a0a;
    --viz-range-low: #e8e6e2;
    --viz-range-high: #d8d6d0;
    --viz-positive: #1e2d24;
    --viz-negative: #4a2c2a;
    --viz-positive-bg: rgba(30, 45, 36, 0.08);
    --viz-negative-bg: rgba(74, 44, 42, 0.08);
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* ─── App Header ────────────────────────────────────────────────────── */

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

.app-brand {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.app-brand h1 {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 1.5rem;
    color: var(--text);
    letter-spacing: 0.02em;
}

.app-brand span {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--brass);
}

.app-nav {
    display: flex;
    gap: 4px;
    align-items: center;
}

.app-nav button {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 4px;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.app-nav button:hover {
    color: var(--text);
}

.app-nav button.active {
    color: var(--text);
    border-color: var(--border);
    background: var(--bg-secondary);
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.header-user-name {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ─── Buttons ───────────────────────────────────────────────────────── */

.btn {
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--brass);
    color: var(--brass);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: 4px;
    transition: background var(--transition-base), color var(--transition-base);
    white-space: nowrap;
}

.btn:hover {
    background: var(--brass);
    color: var(--bg);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--brass);
    color: var(--bg);
}

.btn-primary:hover {
    background: var(--brass-dark);
    border-color: var(--brass-dark);
}

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

.btn-danger:hover {
    background: var(--error);
    color: #fff;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.6875rem;
}

.btn-ghost {
    border-color: var(--border);
    color: var(--text-muted);
}

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--text);
}

.btn-logout {
    border-color: var(--border);
    color: var(--text-muted);
}

.btn-logout:hover {
    background: var(--bg-secondary);
    color: var(--text);
}

/* ─── Layout ────────────────────────────────────────────────────────── */

.app-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* ─── Cards & Lists ─────────────────────────────────────────────────── */

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
    transition: border-color var(--transition-base);
}

.card:hover {
    border-color: var(--brass-light);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.25rem;
    color: var(--text);
}

.card-label {
    display: inline-block;
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--brass);
    padding: 3px 8px;
    border: 1px solid var(--brass-light);
    border-radius: 3px;
}

.card-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.client-card {
    cursor: pointer;
}

/* ─── Section Headers ───────────────────────────────────────────────── */

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.75rem;
    color: var(--text);
}

.section-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.breadcrumb a {
    color: var(--brass);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb .separator {
    color: var(--border);
}

/* ─── Forms ─────────────────────────────────────────────────────────── */

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    transition: border-color var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--brass);
}

.form-input::placeholder {
    color: var(--text-placeholder);
}

.form-input-small {
    width: 120px;
}

.form-select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    transition: border-color var(--transition-base);
    cursor: pointer;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%236b6b6b' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.form-select:focus {
    outline: none;
    border-color: var(--brass);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-section {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-section-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 20px;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-inline {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-suffix {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ─── Traffic Sources Table ─────────────────────────────────────────── */

.sources-table {
    width: 100%;
    border-collapse: collapse;
}

.sources-table th {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-align: left;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
}

.sources-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
}

.sources-table input {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.875rem;
}

.sources-table input:focus {
    outline: none;
    border-color: var(--brass);
}

.sources-table .remove-row {
    background: none;
    border: none;
    color: var(--text-placeholder);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    transition: color var(--transition-fast);
}

.sources-table .remove-row:hover {
    color: var(--error);
}

/* ─── Modal ─────────────────────────────────────────────────────────── */

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 10, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 32px;
}

.modal-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 24px;
}

/* ─── Empty State ───────────────────────────────────────────────────── */

.empty-state {
    text-align: center;
    padding: 64px 24px;
    color: var(--text-muted);
}

.empty-state h3 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 0.875rem;
    margin-bottom: 24px;
}

/* ─── Loading ───────────────────────────────────────────────────────── */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.loading::before {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--brass);
    border-radius: 50%;
    margin-right: 12px;
    animation: spin 0.8s linear infinite;
}

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

/* ─── Error / Success Messages ──────────────────────────────────────── */

.message {
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 0.8125rem;
    margin-bottom: 16px;
}

.message-error {
    background: rgba(220, 80, 80, 0.08);
    border: 1px solid rgba(220, 80, 80, 0.25);
    color: var(--error);
}

.message-success {
    background: rgba(74, 157, 107, 0.08);
    border: 1px solid rgba(74, 157, 107, 0.25);
    color: var(--success);
}

/* ─── Dashboard ─────────────────────────────────────────────────────── */

.dashboard-grid {
    display: grid;
    gap: 24px;
    margin-top: 24px;
}

.dashboard-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
}

.dashboard-section-title {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.125rem;
    color: var(--text);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

/* ─── Level Meters ──────────────────────────────────────────────────── */

.level-meters {
    display: grid;
    gap: 24px;
}

.level-meter {
    padding: 16px 0;
}

.level-meter-label {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 12px;
}

.level-meter-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
}

.level-meter-gap {
    font-size: 0.75rem;
    font-weight: 500;
}

.level-meter-gap.positive {
    color: var(--viz-positive);
}

.level-meter-gap.negative {
    color: var(--viz-negative);
}

.level-meter-bar {
    position: relative;
    height: 8px;
    background: linear-gradient(90deg, var(--viz-range-low), var(--viz-range-high));
    border-radius: 4px;
    margin-bottom: 8px;
}

.level-meter-client {
    position: absolute;
    top: -4px;
    width: 16px;
    height: 16px;
    background: var(--viz-client);
    border-radius: 50%;
    border: 2px solid var(--bg-secondary);
    transform: translateX(-50%);
    z-index: 2;
}

.level-meter-median {
    position: absolute;
    top: -6px;
    width: 2px;
    height: 20px;
    background: var(--viz-benchmark);
    transform: translateX(-50%);
    z-index: 1;
}

.level-meter-scale {
    display: flex;
    justify-content: space-between;
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.level-meter-values {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.level-meter-values .client-val {
    color: var(--viz-client);
    font-weight: 500;
}

.level-meter-values .benchmark-val {
    color: var(--viz-benchmark);
    font-weight: 500;
}

.level-meter-impact {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-style: italic;
}

/* ─── Conversion Funnel ─────────────────────────────────────────────── */

.funnel-stages {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.funnel-stage {
    display: grid;
    grid-template-columns: 140px 1fr 80px;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
}

.funnel-stage-label {
    font-size: 0.8125rem;
    color: var(--text);
    font-weight: 500;
}

.funnel-bars {
    position: relative;
    height: 28px;
}

.funnel-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 12px;
    border-radius: 3px;
    transition: width var(--transition-base);
}

.funnel-bar.client {
    background: var(--viz-client);
    top: 0;
}

.funnel-bar.benchmark {
    background: var(--viz-benchmark);
    opacity: 0.2;
    top: 14px;
}

.funnel-stage-value {
    font-size: 0.8125rem;
    text-align: right;
}

.funnel-dropoff {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0 4px 156px;
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.funnel-dropoff-arrow {
    color: var(--viz-negative);
}

/* ─── Device Split ──────────────────────────────────────────────────── */

.device-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.device-column h4 {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.device-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.device-bar-label {
    width: 60px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.device-bar-track {
    flex: 1;
    height: 8px;
    background: var(--viz-range-low);
    border-radius: 4px;
    overflow: hidden;
}

.device-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width var(--transition-base);
}

.device-bar-fill.brass {
    background: var(--viz-client);
}

.device-bar-value {
    width: 40px;
    font-size: 0.8125rem;
    color: var(--text);
    text-align: right;
}

.device-insight {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--viz-negative-bg);
    border-radius: 4px;
    font-size: 0.8125rem;
    color: var(--viz-negative);
    line-height: 1.5;
}

/* ─── Traffic Source Grid ───────────────────────────────────────────── */

.source-grid {
    position: relative;
    min-height: 240px;
    padding: 16px 0;
}

.source-grid-axes {
    position: absolute;
    inset: 0;
}

.source-dot {
    position: absolute;
    border-radius: 50%;
    background: var(--viz-client);
    opacity: 0.8;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-fast);
}

.source-dot:hover {
    opacity: 1;
}

.source-dot-label {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-size: 0.6875rem;
    color: var(--text-secondary);
    margin-top: 4px;
    pointer-events: none;
}

.source-reference-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--viz-benchmark);
    opacity: 0.3;
}

.source-reference-label {
    position: absolute;
    right: 0;
    font-size: 0.625rem;
    color: var(--text-muted);
    transform: translateY(-100%);
    padding-bottom: 2px;
}

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

.source-item {
    display: grid;
    grid-template-columns: 1fr 80px 80px;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.source-item:last-child {
    border-bottom: none;
}

.source-name {
    font-size: 0.875rem;
    color: var(--text);
}

.source-sessions {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: right;
}

.source-cr {
    font-size: 0.8125rem;
    font-weight: 500;
    text-align: right;
}

/* ─── Signals & Diagnosis Notes ─────────────────────────────────────── */

.signals-list {
    display: grid;
    gap: 16px;
}

.signal-item {
    padding: 16px;
    border-radius: 6px;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.signal-item.negative {
    background: var(--viz-negative-bg);
    border-left: 3px solid var(--viz-negative);
}

.signal-item.positive {
    background: var(--viz-positive-bg);
    border-left: 3px solid var(--viz-positive);
}

.signal-item .signal-label {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.diagnosis-notes {
    margin-top: 24px;
}

.diagnosis-notes textarea {
    width: 100%;
    min-height: 200px;
    padding: 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.7;
    resize: vertical;
    transition: border-color var(--transition-base);
}

.diagnosis-notes textarea:focus {
    outline: none;
    border-color: var(--brass);
}

.diagnosis-notes .save-indicator {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
    text-align: right;
    min-height: 18px;
}

/* ─── Benchmarks View ───────────────────────────────────────────────── */

.benchmark-vertical {
    margin-bottom: 32px;
}

.benchmark-vertical-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.benchmark-vertical-name {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.25rem;
}

.benchmark-sources {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.benchmark-table {
    width: 100%;
    border-collapse: collapse;
}

.benchmark-table th {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-align: left;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
}

.benchmark-table td {
    padding: 8px 12px;
    font-size: 0.875rem;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.benchmark-table .metric-name {
    font-weight: 500;
}

.benchmark-table input {
    width: 80px;
    padding: 4px 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.875rem;
    text-align: right;
}

.benchmark-table input:focus {
    outline: none;
    border-color: var(--brass);
}

/* ─── Diagnostics List ──────────────────────────────────────────────── */

.diagnostics-list {
    display: grid;
    gap: 12px;
    margin-top: 16px;
}

.diagnostic-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color var(--transition-base);
}

.diagnostic-item:hover {
    border-color: var(--brass-light);
}

.diagnostic-item-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.diagnostic-period {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.125rem;
    color: var(--text);
}

.diagnostic-status {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 3px;
}

.diagnostic-status.draft {
    color: var(--text-muted);
    background: var(--bg-tertiary);
}

.diagnostic-status.complete {
    color: var(--viz-positive);
    background: var(--viz-positive-bg);
}

.diagnostic-date {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.diagnostic-actions {
    display: flex;
    gap: 8px;
}

/* ─── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }

    .app-nav {
        width: 100%;
        overflow-x: auto;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .device-grid {
        grid-template-columns: 1fr;
    }

    .funnel-stage {
        grid-template-columns: 100px 1fr 60px;
    }

    .source-item {
        grid-template-columns: 1fr 60px 60px;
    }

    .app-content {
        padding: 20px 16px;
    }
}