:root {
    --kudzu-green: #1f7a3b;
    --kudzu-green-dark: #0e4d2b;
    --kudzu-lime: #8fc52b;
    --kudzu-soft: #eef6ea;
    --kudzu-stone: #f1ece4;
    --ink: #17211b;
    --muted: #66736b;
    --line: #dfe7e1;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); font-family: Arial, Helvetica, sans-serif; background: #f6f8f6; }
a { color: var(--kudzu-green); }
a:hover { color: var(--kudzu-green-dark); }

.login-page { min-height: 100vh; background: radial-gradient(circle at 8% 8%, rgba(143,197,43,.24), transparent 32%), linear-gradient(135deg, #f4f8f2 0%, #ffffff 52%, #f3f7f4 100%); display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-wrap { width: 100%; max-width: 640px; }
.login-card { overflow: hidden; border: 0; border-radius: 22px; background: #fff; box-shadow: 0 24px 60px rgba(18, 59, 35, .18); }
.login-brand { padding: 32px 32px 26px; background: linear-gradient(135deg, var(--kudzu-green-dark), var(--kudzu-green)); text-align: center; }
.login-brand img { display: block; width: min(280px, 90%); max-height: 100px; object-fit: contain; margin: 0 auto 14px; }
.login-brand span { color: #fff; font-size: 14px; letter-spacing: .04em; font-weight: 700; }
.login-body { padding: 34px; }
.login-body h1 { margin: 0 0 8px; font-family: Georgia, 'Times New Roman', serif; font-size: 30px; color: var(--kudzu-green-dark); }
.login-body .lead-copy { color: var(--muted); margin-bottom: 28px; }
.form-label { font-weight: 700; font-size: 14px; }
.form-control, .form-select { min-height: 50px; border-radius: 11px; border-color: #d7dfd9; }
.form-control:focus, .form-select:focus { border-color: var(--kudzu-lime); box-shadow: 0 0 0 .22rem rgba(143,197,43,.18); }
.input-group .form-control { border-radius: 11px 0 0 11px; }
.input-group .btn { border-radius: 0 11px 11px 0; }
.btn-kudzu { color: #fff; background: var(--kudzu-green); border-color: var(--kudzu-green); min-height: 50px; border-radius: 11px; font-weight: 700; }
.btn-kudzu:hover, .btn-kudzu:focus { color: #fff; background: var(--kudzu-green-dark); border-color: var(--kudzu-green-dark); }
.login-footer { border-top: 1px solid var(--line); background: #fbfcfb; padding: 18px 24px; text-align: center; font-size: 13px; color: var(--muted); }
.demo-credentials { background: var(--kudzu-soft); border: 1px solid #d7e9cf; border-radius: 12px; padding: 14px; font-size: 13px; }

.app-shell { min-height: 100vh; display: flex; }
.app-sidebar { width: 270px; flex: 0 0 270px; background: linear-gradient(180deg, #0e4d2b 0%, #103e27 100%); color: #fff; display: flex; flex-direction: column; position: fixed; inset: 0 auto 0 0; z-index: 1035; }
.app-brand { padding: 28px 24px 22px; border-bottom: 1px solid rgba(255,255,255,.12); text-align: center; }
.app-brand img { width: 190px; max-height: 68px; object-fit: contain; }
.app-brand span { display: block; margin-top: 10px; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: rgba(255,255,255,.72); }
.app-nav { padding: 18px 14px; flex: 1; }
.app-nav-link { color: rgba(255,255,255,.78); text-decoration: none; display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 10px; margin-bottom: 5px; font-weight: 600; }
.app-nav-link i { width: 22px; font-size: 18px; }
.app-nav-link:hover, .app-nav-link.active { color: #fff; background: rgba(143,197,43,.22); }
.sidebar-footer { padding: 20px; border-top: 1px solid rgba(255,255,255,.12); }
.app-main { width: calc(100% - 270px); margin-left: 270px; min-height: 100vh; display: flex; flex-direction: column; }
.app-topbar { min-height: 108px; padding: 24px 34px; background: #fff; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.app-topbar h1 { margin: 0 0 4px; font-size: 28px; font-weight: 800; }
.app-topbar p { margin: 0; color: var(--muted); }
.user-chip { display: flex; align-items: center; gap: 10px; }
.user-chip > span { width: 44px; height: 44px; border-radius: 50%; background: var(--kudzu-soft); color: var(--kudzu-green-dark); display: grid; place-items: center; font-weight: 800; }
.user-chip strong, .user-chip small { display: block; }
.user-chip small { color: var(--muted); }
.app-content { padding: 30px 34px; flex: 1; }
.app-footer { padding: 20px 34px; display: flex; justify-content: space-between; color: var(--muted); border-top: 1px solid var(--line); background: #fff; font-size: 13px; }
.app-mobile-nav { background: var(--kudzu-green-dark); }
.app-mobile-nav .navbar-brand img { height: 38px; width: 150px; object-fit: contain; }

.metric-card, .content-card { border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: 0 8px 24px rgba(34, 61, 44, .06); }
.metric-card { padding: 22px; height: 100%; }
.metric-icon { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: var(--kudzu-soft); color: var(--kudzu-green); font-size: 22px; }
.metric-label { color: var(--muted); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.metric-value { margin-top: 8px; font-size: 28px; font-weight: 800; }
.content-card .card-header { border: 0; background: transparent; padding: 22px 22px 10px; }
.content-card .card-header h2 { margin: 0; font-size: 19px; font-weight: 800; }
.content-card .card-body { padding: 18px 22px 22px; }
.table > :not(caption) > * > * { padding: .9rem .75rem; border-bottom-color: var(--line); vertical-align: middle; }
.badge { font-weight: 700; }
.balance-due { color: #b02a37; }
.balance-credit { color: var(--kudzu-green); }
.empty-state { text-align: center; padding: 45px 20px; color: var(--muted); }
.empty-state i { display: block; font-size: 42px; color: #a8b7ac; margin-bottom: 12px; }
.demo-banner { border: 1px solid #ffe69c; background: #fff3cd; border-radius: 12px; padding: 13px 16px; color: #664d03; }
.receipt { max-width: 720px; margin: 0 auto; }
.receipt-logo { background: var(--kudzu-green-dark); border-radius: 14px; padding: 22px; text-align: center; }
.receipt-logo img { max-width: 240px; max-height: 75px; object-fit: contain; }

@media (max-width: 991.98px) {
    .app-sidebar { position: fixed; width: 280px; }
    .app-main { width: 100%; margin-left: 0; }
    .app-topbar { padding: 22px; }
    .app-content { padding: 22px; }
    .app-brand { display: none; }
    .app-nav { padding-top: 8px; }
}

@media (max-width: 575.98px) {
    .login-page { padding: 14px; align-items: flex-start; }
    .login-wrap { margin-top: 18px; }
    .login-brand { padding: 25px 20px 20px; }
    .login-body { padding: 26px 22px; }
    .login-body h1 { font-size: 26px; }
    .app-topbar { align-items: flex-start; }
    .user-chip { display: none; }
    .app-content { padding: 18px 14px; }
    .app-footer { padding: 18px 14px; display: block; }
    .app-footer span { display: block; margin-bottom: 4px; }
    .table-responsive { font-size: 14px; }
}

@media print {
    .app-sidebar, .app-mobile-nav, .app-topbar, .app-footer, .no-print { display: none !important; }
    .app-main { margin: 0; width: 100%; }
    .app-content { padding: 0; }
    .content-card { box-shadow: none; border: 0; }
}