:root {
    --tk-orange: #ED6B06;
    --tk-orange-dark: #C95605;
    --tk-orange-light: #FFF4ED;
    --tk-gray-dark: #4A4A4A;
    --tk-gray: #6B6B6B;
    --tk-gray-light: #F5F5F5;
    --tk-border: #E0E0E0;
    --tk-text: #1A1A1A;
    --tk-white: #FFFFFF;
    --tk-success: #027A48;
    --tk-success-bg: #ECFDF3;
    --tk-error: #B42318;
    --tk-error-bg: #FEF3F2;
    --tk-warning: #B54708;
    --tk-warning-bg: #FFFAEB;
    --shadow-sm: 0 1px 3px rgba(74, 74, 74, 0.08);
    --shadow-md: 0 4px 16px rgba(74, 74, 74, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--tk-gray-light);
    color: var(--tk-text);
    line-height: 1.5;
    min-height: 100vh;
}

a { color: var(--tk-orange); text-decoration: none; }
a:hover { color: var(--tk-orange-dark); text-decoration: underline; }

/* ── Header ── */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.5rem;
    background: var(--tk-gray-dark);
    color: var(--tk-white);
    border-bottom: 4px solid var(--tk-orange);
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.topbar-logo {
    width: 36px;
    height: 36px;
    background: var(--tk-orange);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.topbar h1 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.2;
}

.topbar-sub {
    margin: 0;
    font-size: 0.78rem;
    color: #BBBBBB;
    font-weight: normal;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.topbar-nav {
    display: flex;
    gap: 0.25rem;
}

.topbar-nav a {
    color: #DDDDDD;
    padding: 0.35rem 0.65rem;
    border-radius: 4px;
    font-size: 0.88rem;
    text-decoration: none;
}

.topbar-nav a:hover,
.topbar-nav a.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--tk-white);
    text-decoration: none;
}

.user-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: #CCCCCC;
}

a.user-chip-link {
    text-decoration: none;
    cursor: pointer;
}

a.user-chip-link:hover {
    color: #FFFFFF;
}

.topbar .btn-logout {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: var(--tk-white);
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
}

.topbar .btn-logout:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* ── Layout ── */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 1.5rem 1rem 2.5rem;
}

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

.page-header h2 {
    margin: 0 0 0.35rem;
    font-size: 1.65rem;
    color: var(--tk-gray-dark);
}

.page-lead {
    margin: 0;
    color: var(--tk-gray);
    font-size: 0.95rem;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--tk-white);
    border: 1px solid var(--tk-border);
    border-radius: var(--radius);
    padding: 1rem 1.15rem;
    box-shadow: var(--shadow-sm);
}

.stat-card.accent-new { border-left: 4px solid var(--tk-orange); }
.stat-card.accent-edit { border-left: 4px solid var(--tk-gray-dark); }
.stat-card.accent-total { border-left: 4px solid var(--tk-gray); }

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--tk-gray-dark);
}

.stat-card.accent-new .stat-value { color: var(--tk-orange); }

.stat-label {
    margin-top: 0.25rem;
    font-size: 0.85rem;
    color: var(--tk-gray);
}

.layout-2col {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 1rem;
    align-items: start;
}

@media (max-width: 900px) {
    .layout-2col { grid-template-columns: 1fr; }
    .topbar { flex-wrap: wrap; }
}

/* ── Cards ── */
.card {
    background: var(--tk-white);
    border: 1px solid var(--tk-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.35rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--tk-border);
}

.card-header h2,
.card-header h3,
.card > h2,
.card > h3 {
    margin: 0;
    color: var(--tk-gray-dark);
    font-size: 1.1rem;
}

.card > h2 { font-size: 1.2rem; margin-bottom: 1rem; }

.card-desc {
    margin: 0.35rem 0 0;
    font-size: 0.88rem;
    color: var(--tk-gray);
    font-weight: normal;
}

.card-accent-orange { border-top: 3px solid var(--tk-orange); }
.card-accent-gray { border-top: 3px solid var(--tk-gray-dark); }

.sidebar-card {
    background: var(--tk-orange-light);
    border: 1px solid #F5D5BC;
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.88rem;
}

.sidebar-card h4 {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
    color: var(--tk-gray-dark);
}

.sidebar-card ul {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--tk-gray);
}

.sidebar-card li { margin-bottom: 0.3rem; }

.narrow { max-width: 420px; margin: 3rem auto; }

/* ── Forms ── */
.form-grid { display: grid; gap: 0.85rem; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

@media (max-width: 600px) {
    .form-row { grid-template-columns: 1fr; }
}

label {
    display: grid;
    gap: 0.35rem;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--tk-gray-dark);
}

input, select, textarea, button {
    font: inherit;
}

input, select, textarea {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--tk-border);
    border-radius: 6px;
    background: var(--tk-white);
    color: var(--tk-text);
    transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--tk-orange);
    box-shadow: 0 0 0 3px rgba(237, 107, 6, 0.15);
}

textarea { width: 100%; resize: vertical; }

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    cursor: pointer;
}

.checkbox input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--tk-orange);
    cursor: pointer;
}

.display-options {
    border: 1px solid var(--tk-border);
    border-radius: var(--radius);
    padding: 0.85rem 1rem;
    display: grid;
    gap: 0.5rem;
    background: var(--tk-gray-light);
}

.display-options legend {
    font-weight: 600;
    padding: 0 0.35rem;
    color: var(--tk-gray-dark);
    font-size: 0.88rem;
}

/* ── Buttons ── */
button {
    width: fit-content;
    background: var(--tk-orange);
    color: var(--tk-white);
    border: 0;
    border-radius: 6px;
    cursor: pointer;
    padding: 0.6rem 1.1rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background 0.15s, transform 0.1s;
}

button:hover { background: var(--tk-orange-dark); }
button:active { transform: scale(0.98); }

.btn-primary {
    background: var(--tk-orange);
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
}

.btn-block { width: 100%; }

.btn-secondary {
    background: var(--tk-gray-dark);
}

.btn-secondary:hover { background: #3A3A3A; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--tk-border);
    color: var(--tk-gray-dark);
}

.btn-outline:hover {
    background: var(--tk-gray-light);
    border-color: var(--tk-gray);
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

/* ── Badges ── */
.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-admin { background: var(--tk-orange-light); color: var(--tk-orange-dark); }
.badge-editor { background: #EEEEEE; color: var(--tk-gray-dark); }
.badge-reader { background: var(--tk-gray-light); color: var(--tk-gray); }

.badge-sent { background: var(--tk-success-bg); color: var(--tk-success); }
.badge-failed { background: var(--tk-error-bg); color: var(--tk-error); }
.badge-skipped { background: var(--tk-warning-bg); color: var(--tk-warning); }

.count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.6rem;
    padding: 0.15rem 0.5rem;
    background: var(--tk-gray-light);
    border: 1px solid var(--tk-border);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--tk-gray-dark);
}

.count-badge.orange {
    background: var(--tk-orange-light);
    border-color: #F5D5BC;
    color: var(--tk-orange-dark);
}

/* ── Tables ── */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th {
    background: var(--tk-gray-light);
    color: var(--tk-gray-dark);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.65rem 0.75rem;
    text-align: left;
    border-bottom: 2px solid var(--tk-border);
}

td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--tk-border);
    vertical-align: top;
}

tbody tr:hover { background: #FAFAFA; }

.empty-row td {
    color: var(--tk-gray);
    font-style: italic;
    text-align: center;
    padding: 1.5rem;
}

/* ── Preview & Copy ── */
.copy-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding: 0.85rem;
    background: var(--tk-gray-light);
    border-radius: var(--radius);
    border: 1px solid var(--tk-border);
}

.copy-status {
    font-size: 0.88rem;
    color: var(--tk-gray);
    flex: 1 1 100%;
    margin-top: 0.25rem;
}

@media (min-width: 700px) {
    .copy-status { flex: 1 1 auto; margin-top: 0; margin-left: 0.5rem; }
}

.copy-status.success { color: var(--tk-success); }
.copy-status.error { color: var(--tk-error); }

.preview-banner {
    margin-top: 0.5rem;
    padding: 0.5rem 0.85rem;
    background: var(--tk-orange-light);
    border: 1px solid #F5D5BC;
    border-bottom: none;
    border-radius: var(--radius) var(--radius) 0 0;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--tk-orange-dark);
    text-align: center;
}

.newsletter-preview-frame {
    width: 100%;
    min-height: 640px;
    border: 1px solid var(--tk-border);
    border-radius: 0 0 var(--radius) var(--radius);
    background: #FFFFFF;
    box-shadow: var(--shadow-md);
    display: block;
}

.send-section {
    margin-top: 1.25rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--tk-border);
    border-left: 4px solid var(--tk-orange);
    border-radius: var(--radius);
    background: var(--tk-gray-light);
}

.send-banner {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid transparent;
}

.send-banner-sent {
    background: #E7F5EC;
    color: #1E7A43;
    border-color: #B7E0C6;
}

.send-banner-failed {
    background: #FDEAEA;
    color: #B42318;
    border-color: #F5C2C0;
}

.send-banner-skipped {
    background: var(--tk-orange-light);
    color: var(--tk-orange-dark);
    border-color: #F5C9A6;
}

.textarea-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.readonly-output {
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.82rem;
    line-height: 1.45;
    background: var(--tk-gray-light);
}

.hidden-source { display: none; }

/* ── Collapsible ── */
details.card-details {
    background: var(--tk-white);
    border: 1px solid var(--tk-border);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

details.card-details > summary {
    padding: 1rem 1.35rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--tk-gray-dark);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

details.card-details > summary::-webkit-details-marker { display: none; }

details.card-details > summary::after {
    content: "▸";
    color: var(--tk-gray);
    transition: transform 0.2s;
}

details.card-details[open] > summary::after {
    transform: rotate(90deg);
}

details.card-details > summary:hover { background: var(--tk-gray-light); }

details.card-details .details-body {
    padding: 0 1.35rem 1.25rem;
    border-top: 1px solid var(--tk-border);
}

/* ── Alerts ── */
.error, .alert-error {
    color: var(--tk-error);
    background: var(--tk-error-bg);
    border: 1px solid #FECDCA;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin: 0 0 0.85rem;
    font-size: 0.9rem;
}

.hint {
    color: var(--tk-gray);
    font-size: 0.88rem;
    margin: 0 0 0.75rem;
    line-height: 1.5;
}

/* ── Login ── */
body.login-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body.login-page .topbar { flex-shrink: 0; }

body.login-page .container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.login-card {
    width: 100%;
    max-width: 400px;
    border-top: 4px solid var(--tk-orange);
}

.login-card h2 {
    margin: 0 0 0.35rem;
    color: var(--tk-gray-dark);
}

.login-subtitle {
    margin: 0 0 1.25rem;
    color: var(--tk-gray);
    font-size: 0.9rem;
}

/* ── Copy dialog ── */
.copy-dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(26, 26, 26, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.copy-dialog {
    width: min(900px, 100%);
    max-height: 90vh;
    background: var(--tk-white);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
    border-top: 4px solid var(--tk-orange);
    display: grid;
    gap: 0.85rem;
}

.copy-dialog h4 { margin: 0; color: var(--tk-gray-dark); }
.copy-dialog-hint { margin: 0; color: var(--tk-gray); }
.copy-dialog-textarea {
    width: 100%;
    min-height: 320px;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.85rem;
    line-height: 1.4;
    border: 1px solid var(--tk-border);
    border-radius: 6px;
    padding: 0.75rem;
    resize: vertical;
}

.copy-dialog-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* ── Footer ── */
.site-footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    color: var(--tk-gray);
    border-top: 1px solid var(--tk-border);
    background: var(--tk-white);
}