:root {
    --green-900: #064a2b;
    --green-700: #0a7a44;
    --green-500: #15a85f;
    --green-50:  #eafaf1;
    --ink-900:   #0f1b24;
    --ink-700:   #2a3a45;
    --ink-500:   #5b6a76;
    --ink-300:   #9aa6ae;
    --ink-100:   #e3e8eb;
    --bg:        #f5f7f8;
    --paper:     #ffffff;
    --danger:    #b3261e;
    --danger-bg: #fdecea;
    --warn:      #946200;
    --warn-bg:   #fff5dd;
    --info:      #074785;
    --info-bg:   #e2efff;
    --ok:        #0a7a44;
    --ok-bg:     #e6f6ed;
    --radius:    10px;
    --shadow:    0 1px 3px rgba(15, 27, 36, 0.05), 0 4px 12px rgba(15, 27, 36, 0.04);
    --font:      -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono:      ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--ink-900);
    line-height: 1.45;
    font-size: 15px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }

a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { color: var(--ink-900); margin: 0 0 12px; }
h1 { font-size: 1.6rem; letter-spacing: -0.01em; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1rem; }
p { color: var(--ink-700); }

/* Header */
.site-header {
    background: var(--paper);
    border-bottom: 1px solid var(--ink-100);
    position: sticky;
    top: 0;
    z-index: 10;
}
.header-inner {
    display: flex;
    align-items: center;
    height: 60px;
    gap: 24px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--ink-900);
    letter-spacing: -0.01em;
    font-size: 1.1rem;
}
.brand:hover { text-decoration: none; }
.brand-mark {
    background: var(--green-700);
    color: #fff;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.brand-name { color: var(--ink-900); }

.primary-nav { display: flex; gap: 4px; flex: 1; }
.primary-nav a {
    color: var(--ink-700);
    padding: 8px 12px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.92rem;
}
.primary-nav a:hover { background: var(--ink-100); text-decoration: none; }
.primary-nav a.active { background: var(--green-50); color: var(--green-900); }

.user-menu { display: flex; align-items: center; gap: 12px; }
.user-email { color: var(--ink-500); font-size: 0.88rem; }

/* Main */
.site-main { flex: 1; padding: 28px 0 56px; }
.guest-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 56px 0;
}

.site-footer {
    border-top: 1px solid var(--ink-100);
    background: var(--paper);
    padding: 16px 0;
    color: var(--ink-500);
}

/* Cards */
.card {
    background: var(--paper);
    border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}
.card-tight { padding: 16px 20px; }
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    gap: 12px;
}
.card-header h2 { margin: 0; }
.card-header .subtitle { color: var(--ink-500); font-size: 0.88rem; }

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
@media (max-width: 820px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .primary-nav { display: none; }
    .header-inner { gap: 12px; }
}

/* Forms */
.form-row { margin-bottom: 16px; }
.form-row label {
    display: block;
    font-weight: 600;
    color: var(--ink-700);
    margin-bottom: 6px;
    font-size: 0.88rem;
}
.form-row .hint { color: var(--ink-500); font-size: 0.82rem; margin-top: 4px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.form-grid .span-2 { grid-column: 1 / -1; }
@media (max-width: 720px) { .form-grid { grid-template-columns: 1fr; } }

input[type="text"], input[type="email"], input[type="password"], input[type="url"],
input[type="number"], input[type="datetime-local"], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--ink-100);
    border-radius: 8px;
    background: var(--paper);
    font: inherit;
    color: var(--ink-900);
    transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px rgba(21, 168, 95, 0.15);
}

input[type="checkbox"] { accent-color: var(--green-700); margin-right: 6px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: var(--green-700);
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, transform 0.05s;
    text-decoration: none;
}
.btn:hover { background: var(--green-900); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-secondary {
    background: var(--paper);
    color: var(--ink-900);
    border-color: var(--ink-100);
}
.btn-secondary:hover { background: var(--ink-100); }
.btn-ghost {
    background: transparent;
    color: var(--ink-700);
    border-color: transparent;
}
.btn-ghost:hover { background: var(--ink-100); }
.btn-sm { padding: 6px 12px; font-size: 0.86rem; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #8e1e18; }

/* Login */
.login-card {
    width: 100%;
    max-width: 420px;
    padding: 36px;
}
.login-card .brand { margin-bottom: 24px; }
.login-card h1 { font-size: 1.4rem; margin-bottom: 6px; }
.login-card p.lead { color: var(--ink-500); margin: 0 0 24px; font-size: 0.92rem; }
.login-card .btn { width: 100%; padding: 12px; }

/* Flash */
.flash-stack { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
.flash {
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid transparent;
    font-size: 0.92rem;
}
.flash-success { background: var(--ok-bg);    color: var(--ok);     border-color: #b8e3ca; }
.flash-error   { background: var(--danger-bg);color: var(--danger); border-color: #f3c4c0; }
.flash-warning { background: var(--warn-bg);  color: var(--warn);   border-color: #f1ddae; }
.flash-info    { background: var(--info-bg);  color: var(--info);   border-color: #bcd5ef; }

/* Stat tiles */
.stat-tile {
    background: var(--paper);
    border: 1px solid var(--ink-100);
    border-radius: var(--radius);
    padding: 16px 18px;
}
.stat-tile .label { color: var(--ink-500); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-tile .value { font-size: 1.6rem; font-weight: 700; margin-top: 4px; }
.stat-tile.ok    .value { color: var(--ok); }
.stat-tile.warn  .value { color: var(--warn); }
.stat-tile.bad   .value { color: var(--danger); }
.stat-tile.info  .value { color: var(--info); }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--ink-100); border-radius: var(--radius); background: var(--paper); }
table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
table.data th, table.data td {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--ink-100);
    vertical-align: top;
}
table.data th {
    background: #fafbfc;
    color: var(--ink-500);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.74rem;
    letter-spacing: 0.05em;
}
table.data tr:last-child td { border-bottom: none; }
table.data td.mono, table.data th.mono { font-family: var(--mono); font-size: 0.84rem; }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: var(--ink-100);
    color: var(--ink-700);
}
.badge.ok       { background: var(--ok-bg);     color: var(--ok); }
.badge.warn     { background: var(--warn-bg);   color: var(--warn); }
.badge.bad      { background: var(--danger-bg); color: var(--danger); }
.badge.info     { background: var(--info-bg);   color: var(--info); }

.event-accepted, .event-stored               { background: var(--info-bg);   color: var(--info); }
.event-delivered, .event-opened, .event-clicked { background: var(--ok-bg); color: var(--ok); }
.event-failed, .event-rejected, .event-complained { background: var(--danger-bg); color: var(--danger); }
.event-unsubscribed                          { background: var(--warn-bg);   color: var(--warn); }

/* Code blocks */
pre.code {
    background: #0f1b24;
    color: #e3e8eb;
    border-radius: 8px;
    padding: 14px 16px;
    overflow-x: auto;
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.5;
}

/* Empty / status states */
.empty-state {
    padding: 40px 20px;
    text-align: center;
    color: var(--ink-500);
}
.empty-state h3 { color: var(--ink-700); margin-bottom: 4px; }

/* Dashboard tool cards */
.tool-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 20px 22px;
}
.tool-card h2 { margin: 0; }
.tool-card p { margin: 0; }
.tool-card .btn { align-self: flex-start; margin-top: 8px; }

/* Status indicators */
.status-dot {
    width: 8px; height: 8px; border-radius: 50%;
    display: inline-block; margin-right: 6px;
    background: var(--ink-300);
}
.status-dot.ok  { background: var(--ok); }
.status-dot.bad { background: var(--danger); }