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

:root {
    --blue-dark:   #0077b6;
    --blue-mid:    #0096c7;
    --blue-light:  #90e0ef;
    --blue-pale:   #caf0f8;
    --blue-bg:     #f0f8ff;
    --white:       #ffffff;
    --text:        #1a1a2e;
    --text-muted:  #5a6a7a;
    --border:      #b8dff0;
    --success:     #2e7d32;
    --success-bg:  #e8f5e9;
    --error:       #c62828;
    --error-bg:    #ffebee;
    --danger:      #d32f2f;
    --radius:      12px;
    --radius-sm:   8px;
    --shadow:      0 2px 12px rgba(0,119,182,0.10);
}

html { font-size: 16px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--blue-bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

/* ===== Header ===== */
header {
    background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 100%);
    color: var(--white);
    padding: 0 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.logo-icon { font-size: 1.5rem; }

nav {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.nav-link {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255,255,255,0.2);
    color: var(--white);
}

/* ===== Main ===== */
main {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem 1rem 2rem;
}

/* ===== Flash messages ===== */
.flash-container { margin-bottom: 1rem; }

.flash {
    padding: 0.85rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.flash-success { background: var(--success-bg); color: var(--success); border-left: 4px solid var(--success); }
.flash-error   { background: var(--error-bg);   color: var(--error);   border-left: 4px solid var(--error); }

/* ===== Page header ===== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.page-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--blue-dark);
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
}

/* ===== Card ===== */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--blue-dark);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--blue-pale);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.4rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: filter 0.15s, transform 0.1s;
    line-height: 1;
    white-space: nowrap;
}

.btn:active { transform: scale(0.97); }
.btn:hover  { filter: brightness(0.92); }

.btn-primary   { background: var(--blue-dark); color: var(--white); }
.btn-secondary { background: var(--blue-pale); color: var(--blue-dark); }
.btn-danger    { background: #fde8e8; color: var(--danger); }

.btn-sm {
    padding: 0.45rem 0.85rem;
    font-size: 0.875rem;
}

/* ===== Table ===== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

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

thead th {
    background: var(--blue-pale);
    color: var(--blue-dark);
    font-weight: 600;
    text-align: left;
    padding: 0.7rem 0.85rem;
    white-space: nowrap;
    border-bottom: 2px solid var(--border);
}

tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f7fbff; }

tbody td {
    padding: 0.7rem 0.85rem;
    vertical-align: middle;
}

.actions {
    display: flex;
    gap: 0.4rem;
    align-items: center;
    flex-wrap: wrap;
}

.inline-form { display: inline; }

.record-count {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.empty-state {
    color: var(--text-muted);
    text-align: center;
    padding: 2rem 1rem;
}

.empty-state a { color: var(--blue-dark); }

/* ===== Charts ===== */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.chart-card { padding: 1.25rem; }
.chart-card canvas { max-height: 220px; }

/* ===== Forms ===== */
.form-card { max-width: 640px; }

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.1rem;
}

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

label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
}

input[type="text"],
input[type="number"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: 1.05rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--text);
    transition: border-color 0.15s, box-shadow 0.15s;
    -webkit-appearance: none;
    appearance: none;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--blue-mid);
    box-shadow: 0 0 0 3px rgba(0,150,199,0.15);
}

textarea { resize: vertical; min-height: 80px; }

/* ===== Checkboxes ===== */
.checkbox-group {
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.1rem;
    margin-bottom: 1.1rem;
}

.checkbox-group legend {
    font-weight: 600;
    color: var(--text);
    padding: 0 0.4rem;
    font-size: 0.95rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0;
    cursor: pointer;
    font-weight: 500;
    font-size: 1rem;
    border-bottom: 1px solid var(--blue-pale);
}

.checkbox-label:last-child { border-bottom: none; padding-bottom: 0; }
.checkbox-label:first-of-type { padding-top: 0.5rem; }

.checkbox-label input[type="checkbox"] {
    width: 1.4rem;
    height: 1.4rem;
    accent-color: var(--blue-dark);
    cursor: pointer;
    flex-shrink: 0;
}

.checkbox-custom { display: none; }

/* ===== Form actions ===== */
.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.form-actions .btn { flex: 1; min-width: 120px; padding: 0.9rem 1rem; }

/* ===== Footer ===== */
footer {
    background: var(--white);
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 0.9rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Mobile (responsive table) ===== */
@media (max-width: 700px) {
    .header-inner { height: auto; padding: 0.75rem 0; flex-direction: column; align-items: flex-start; }
    .nav-link { padding: 0.55rem 0.7rem; font-size: 0.9rem; }

    .page-header h1 { font-size: 1.3rem; }

    .form-row { grid-template-columns: 1fr; gap: 0; }

    /* Responsive table: stack rows */
    table thead { display: none; }
    table, tbody, tr, td { display: block; width: 100%; }

    tbody tr {
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        margin-bottom: 0.85rem;
        padding: 0.5rem 0;
        background: var(--white);
    }

    tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.5rem 1rem;
        border-bottom: 1px solid var(--blue-pale);
        font-size: 0.9rem;
    }

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

    tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--blue-dark);
        flex-shrink: 0;
        margin-right: 0.5rem;
    }

    td.actions {
        justify-content: flex-end;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    td.actions::before { display: none; }

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

    .btn { font-size: 1rem; padding: 0.85rem 1.2rem; }
}

@media (max-width: 400px) {
    main { padding: 1rem 0.75rem; }
    .card { padding: 1rem; }
}