:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-border: #e0e3e8;
    --color-text: #1f2430;
    --color-text-muted: #6b7280;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-income: #0f9d58;
    --color-expense: #d93025;
    --color-danger: #d93025;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
}

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

.app-shell { display: flex; min-height: 100vh; }

.app-nav {
    width: 220px;
    background: #1f2430;
    color: #dfe3ea;
    flex-shrink: 0;
    padding: 16px 0;
}
.app-nav .brand { font-weight: bold; font-size: 16px; padding: 0 16px 16px; color: #fff; }
.app-nav .company-name { padding: 0 16px 16px; font-size: 12px; color: #9aa4b2; }
.app-nav .nav-group { margin-bottom: 12px; }
.app-nav .nav-group-title { padding: 4px 16px; font-size: 11px; color: #7d8794; letter-spacing: .05em; }
.app-nav a { display: block; padding: 8px 16px; color: #dfe3ea; }
.app-nav a:hover, .app-nav a.active { background: #313848; text-decoration: none; }

.app-main { flex: 1; padding: 24px 32px; max-width: 1200px; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.topbar h1 { font-size: 20px; margin: 0; }
.topbar .user-info { font-size: 13px; color: var(--color-text-muted); }

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.flash { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 16px; font-size: 13px; }
.flash-success { background: #e6f4ea; color: #0f9d58; border: 1px solid #b7e1c5; }
.flash-error { background: #fce8e6; color: #d93025; border: 1px solid #f3b4ae; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--color-border); text-align: left; }
th { color: var(--color-text-muted); font-weight: 600; background: #fafbfc; }
tr:hover td { background: #f9fafb; }
.text-right { text-align: right; }
.num { text-align: right; font-variant-numeric: tabular-nums; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; }
.badge-income { background: #e6f4ea; color: var(--color-income); }
.badge-expense { background: #fce8e6; color: var(--color-expense); }
.badge-paid { background: #e6f4ea; color: var(--color-income); }
.badge-unpaid { background: #fff4e5; color: #b06000; }

form .field { margin-bottom: 14px; }
label { display: block; margin-bottom: 4px; font-size: 12px; color: var(--color-text-muted); }
input[type=text], input[type=number], input[type=date], input[type=password], select, textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    background: #fff;
    color: var(--color-text);
}
textarea { resize: vertical; }
.radio-group { display: flex; gap: 16px; }
.radio-group label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--color-text); }
.radio-group input { width: auto; }

.btn {
    display: inline-block;
    padding: 8px 18px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-text);
    cursor: pointer;
    font-size: 14px;
}
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn-danger { color: var(--color-danger); border-color: var(--color-danger); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.filter-bar { display: flex; gap: 12px; align-items: end; margin-bottom: 16px; flex-wrap: wrap; }
.filter-bar .field { margin-bottom: 0; min-width: 160px; }

.journal-preview { background: #f8f9fb; border: 1px dashed var(--color-border); border-radius: var(--radius); padding: 14px; font-size: 13px; }
.journal-preview .line { display: flex; justify-content: space-between; padding: 3px 0; }
.stat-row { display: flex; gap: 16px; margin-bottom: 20px; }
.stat-tile { flex: 1; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px; }
.stat-tile .label { font-size: 12px; color: var(--color-text-muted); }
.stat-tile .value { font-size: 22px; font-weight: 600; margin-top: 4px; }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { width: 360px; }