/* ── Variables ───────────────────────────────────────────────────────────── */
:root {
    --green:       #3d6b4f;
    --green-dark:  #2e5240;
    --amber:       #d4850a;
    --bg:          #f7f4ef;
    --card-bg:     #ffffff;
    --border:      #ddd6cc;
    --text:        #2c2c2c;
    --muted:       #6b6b6b;
    --danger:      #b83232;
    --danger-dark: #962828;
    --radius:      8px;
    --shadow:      0 2px 8px rgba(0,0,0,0.08);
    --nav-h:       56px;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

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

/* ── Nav ─────────────────────────────────────────────────────────────────── */
.nav {
    height: var(--nav-h);
    background: var(--green);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.nav-brand {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
}
.nav-brand:hover { text-decoration: none; }

.nav-links {
    display: flex;
    gap: 0.25rem;
    list-style: none;
}

.nav-links a {
    color: rgba(255,255,255,0.8);
    padding: 0.4rem 0.75rem;
    border-radius: 4px;
    font-size: 0.95rem;
    transition: background 0.15s, color 0.15s;
}
.nav-links a:hover,
.nav-links a.active {
    background: rgba(255,255,255,0.18);
    color: #fff;
    text-decoration: none;
}

/* ── Layout ──────────────────────────────────────────────────────────────── */
.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

h1 { font-size: 1.6rem; margin-bottom: 1.5rem; }
h2 { font-size: 1.15rem; margin-bottom: 1rem; color: var(--green-dark); }

/* ── Stat cards ──────────────────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1rem;
    text-align: center;
    box-shadow: var(--shadow);
}
.stat-card .label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    margin-bottom: 0.4rem;
}
.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--green);
    line-height: 1.1;
}
.stat-card .unit {
    font-size: 0.78rem;
    color: var(--muted);
    margin-top: 0.2rem;
}
.stat-card.accent .value { color: var(--amber); }

/* ── Cards / sections ────────────────────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    font-size: 0.93rem;
}

thead { background: var(--green); color: #fff; }
th, td { padding: 0.7rem 1rem; text-align: left; }
th { font-weight: 600; font-size: 0.82rem; letter-spacing: 0.04em; }
tbody tr:nth-child(even) { background: #f9f7f4; }
tbody tr:hover { background: #f0ebe3; }

td.notes { color: var(--muted); font-style: italic; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.actions { white-space: nowrap; }
.empty-row td { text-align: center; color: var(--muted); padding: 2rem; font-style: italic; }
.total-row td { font-weight: 600; background: #ede8e0 !important; }

/* ── Forms ───────────────────────────────────────────────────────────────── */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
    gap: 1rem;
    align-items: end;
}

.form-group { display: flex; flex-direction: column; gap: 0.35rem; }
.form-group.span-full { grid-column: 1 / -1; }

label { font-size: 0.875rem; font-weight: 500; }

input[type="text"],
input[type="number"],
input[type="date"],
textarea,
select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.93rem;
    font-family: inherit;
    background: #fff;
    color: var(--text);
    transition: border-color 0.15s, box-shadow 0.15s;
    width: 100%;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(61,107,79,0.12);
}
textarea { resize: vertical; min-height: 68px; }

/* Inline edit inputs inside table cells */
td input[type="text"],
td input[type="number"],
td input[type="date"] {
    padding: 0.3rem 0.5rem;
    font-size: 0.88rem;
    min-width: 80px;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
    display: inline-block;
    padding: 0.5rem 1.1rem;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
    line-height: 1.4;
}
.btn-primary { background: var(--green);  color: #fff; }
.btn-primary:hover { background: var(--green-dark); }
.btn-danger  { background: var(--danger); color: #fff; }
.btn-danger:hover  { background: var(--danger-dark); }
.btn-ghost   { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover   { background: #ede8e0; }
.btn-sm { padding: 0.28rem 0.65rem; font-size: 0.8rem; }

/* ── Messages ────────────────────────────────────────────────────────────── */
.message {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    display: none;
}
.message.success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.message.error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.message.visible { display: block; }

/* ── Filter bar ──────────────────────────────────────────────────────────── */
.filter-bar {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.filter-bar .form-group { min-width: 140px; }

/* ── Misc ────────────────────────────────────────────────────────────────── */
.text-muted { color: var(--muted); font-size: 0.9rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.gap-1 { gap: 0.5rem; }
.flex { display: flex; }

/* ── Mobile nav ──────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
    .nav { gap: 0.5rem; padding: 0 0.75rem; }
    .nav-brand span { display: none; }   /* hide text, keep emoji */
    .nav-links { overflow-x: auto; scrollbar-width: none; }
    .nav-links::-webkit-scrollbar { display: none; }
    .nav-links a { padding: 0.4rem 0.55rem; font-size: 0.82rem; white-space: nowrap; }
}