:root {
    --color-primary: #FF8000;
    --color-primary-hover: #CC6600;
    --color-primary-light: #FFEEDD;
    --color-primary-ring: rgba(255, 128, 0, .22);
    --color-ink: #545454;
    --color-bg: #F5F5F5;
    --color-surface: #FFFFFF;
    --color-border: #D9D9D9;
    --color-text: #333333;
    --color-muted: #767676;
    --color-error: #B3261E;
    --color-error-bg: #FBEAE9;
    --color-success: #2E6B36;
    --color-success-bg: #EAF4EA;
    --color-info: #545454;
    --color-info-bg: #F0F0F0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 2px rgba(84, 84, 84, .08);
    --shadow-md: 0 8px 24px rgba(84, 84, 84, .14);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

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

/* --- Topbar --- */
.topbar {
    background: var(--color-ink);
    border-bottom: 3px solid var(--color-primary);
}
.topbar-inner {
    max-width: 1040px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 14px 24px;
}
.topbar .brand {
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    margin-right: auto;
    letter-spacing: .2px;
}
.topbar .brand::before {
    content: "●";
    color: var(--color-primary);
    margin-right: 8px;
    font-size: 12px;
}
.topbar nav a {
    color: #DADADA;
    margin-right: 22px;
    font-weight: 500;
    font-size: 14px;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: color .15s ease, border-color .15s ease;
}
.topbar nav a:hover {
    color: #fff;
    text-decoration: none;
    border-bottom-color: var(--color-primary);
}
.topbar .logout {
    color: #DADADA;
    font-size: 14px;
    font-weight: 500;
}
.topbar .logout:hover { color: var(--color-primary-light); border-bottom-color: var(--color-primary); }

.container { max-width: 1040px; margin: 0 auto; padding: 32px 24px 64px; }

.page-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.page-header h1 { margin: 0; font-size: 24px; font-weight: 700; letter-spacing: -.2px; }
.page-header h2 { margin: 0; font-size: 18px; font-weight: 600; }

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 24px;
}
.card h2 { margin-top: 0; }

.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 18px; font-weight: 500; font-size: 14px; }
.alert-success { background: var(--color-success-bg); color: var(--color-success); }
.alert-error { background: var(--color-error-bg); color: var(--color-error); }
.alert-info { background: var(--color-info-bg); color: var(--color-info); }

table.table { width: 100%; border-collapse: collapse; margin: 10px 0; }
table.table th, table.table td { padding: 10px 12px; border-bottom: 1px solid var(--color-border); text-align: left; font-size: 14px; }
table.table thead th {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
    font-weight: 600;
    font-size: 12.5px;
    text-transform: uppercase;
    letter-spacing: .04em;
    border-bottom: 1px solid #FFD9B3;
}
table.table tbody tr:hover { background: #fafafa; }
table.table tfoot td { border-top: 2px solid var(--color-border); border-bottom: none; }
.muted { color: var(--color-muted); }
.actions a, .actions .link-btn { margin: 0 2px; }

.link-btn { background: none; border: none; color: var(--color-primary); cursor: pointer; padding: 0; font-size: 14px; font-weight: 500; text-decoration: underline; }
.link-btn:hover { color: var(--color-primary-hover); }
.inline-form { display: inline; }

.form-grid { display: flex; flex-wrap: wrap; gap: 16px; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: 5px; flex: 1 1 200px; }
.field-small { flex: 0 1 110px; }
.field-wide { flex: 1 1 100%; }

label { font-size: 13px; font-weight: 600; color: var(--color-ink); }
input[type=text], input[type=email], input[type=password], input[type=date], input[type=time], select, textarea {
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    width: 100%;
    background: #fff;
    color: var(--color-text);
    transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-ring);
}
textarea { resize: vertical; }

button, .btn-secondary {
    display: inline-block;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s ease, border-color .15s ease, color .15s ease, transform .05s ease;
}
button[type=submit], button:not(.link-btn):not(.remove-row) {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}
button[type=submit]:hover { background: var(--color-primary-hover); }
button[type=submit]:active { transform: translateY(1px); }
.btn-secondary { background: #fff; color: var(--color-text); border: 1px solid var(--color-border); }
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary-hover); text-decoration: none; }
.form-actions { flex: 1 1 100%; margin-top: 6px; display: flex; gap: 10px; }

.month-nav a {
    margin-left: 10px;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text);
}
.month-nav a:hover { border-color: var(--color-primary); color: var(--color-primary-hover); text-decoration: none; background: var(--color-primary-light); }

.login-box {
    max-width: 380px;
    margin: 90px auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 32px;
}
.login-box h1 { margin-top: 0; font-size: 21px; font-weight: 700; }
.login-box form { display: flex; flex-direction: column; gap: 12px; }
.login-box button { margin-top: 8px; }

.modal-backdrop {
    position: fixed; inset: 0; background: rgba(84, 84, 84, .55);
    display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal {
    background: #fff; border-radius: var(--radius); padding: 26px; width: 380px; max-width: 90vw;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--color-primary);
}
.modal h2 { margin-top: 0; }
.modal .field { margin-bottom: 12px; }

code {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 13px;
}

@media (max-width: 640px) {
    .topbar-inner { flex-wrap: wrap; }
    table.table { font-size: 13px; }
    .login-box { margin: 50px auto; }
}