:root{--bg:#f4f7f8;--panel:#fff;--ink:#162324;--muted:#758486;--brand:#0f766e;--brand2:#115e59;--line:#e6eeee;--warn:#b45309;--danger:#b91c1c}
*{box-sizing:border-box}body{margin:0;font-family:Tahoma,Arial,sans-serif;background:var(--bg);color:var(--ink)}
.app{min-height:100vh}.side{position:fixed;right:0;top:0;width:245px;height:100vh;background:#102526;color:#fff;padding:20px;display:flex;flex-direction:column;z-index:3}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.brand-mark,.login-logo{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:#d5a937;color:#102526;font-weight:900}
.brand small{display:block;color:#9eb1b1;margin-top:4px}.side nav{display:flex;flex-direction:column;gap:5px;overflow:auto}.side a{color:#dbe7e7;text-decoration:none;padding:10px 12px;border-radius:9px}.side nav a:hover{background:#1b3b3c;color:#fff}.logout{margin-top:auto;background:#183536}
main{margin-right:245px;padding:24px 30px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}h1{margin:0;font-size:28px}header p{margin:6px 0;color:var(--muted)}.user{background:#fff;padding:10px 14px;border:1px solid var(--line);border-radius:12px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:18px}.kpi{background:var(--panel);padding:18px;border:1px solid var(--line);border-radius:16px;box-shadow:0 4px 18px #193b3b0a}.kpi span{color:var(--muted);font-size:13px}.kpi b{display:block;font-size:26px;margin-top:8px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:18px;overflow:auto}.panel h2{font-size:18px;margin:0 0 16px}.panel-title,.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
table{width:100%;border-collapse:collapse;min-width:620px}th,td{text-align:right;padding:11px;border-bottom:1px solid var(--line);font-size:14px}th{color:var(--muted);font-weight:700;background:#fbfdfd}
.grid-form{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;align-items:end}label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#526466}.wide{grid-column:span 2}
input,select{width:100%;border:1px solid #cedadb;background:#fff;border-radius:9px;padding:10px;font:inherit;color:var(--ink)}input:focus,select:focus{outline:2px solid #99d5d0;border-color:var(--brand)}
.btn,button{border:0;text-decoration:none;cursor:pointer;border-radius:9px;padding:10px 14px;font-weight:700;background:#e9f0f0;color:var(--ink)}.primary,button{background:var(--brand);color:#fff}.primary:hover,button:hover{background:var(--brand2)}.big{padding:13px 22px;margin-top:14px}
.alert{padding:11px 14px;border-radius:10px;margin-bottom:14px;background:#e7f6f2}.alert.danger{background:#fee2e2;color:#991b1b}.alert.warning{background:#fef3c7;color:#92400e}.danger-text{color:var(--danger);font-weight:700}.muted{color:var(--muted);text-align:center}
.invoice-head{display:grid;grid-template-columns:1fr 2fr 1fr;gap:16px;align-items:end}.invoice-head span{display:block;color:var(--muted);font-size:13px}.invoice-head b{font-size:18px}
.line-row{display:grid;grid-template-columns:2fr 1fr 1fr;gap:10px;margin-bottom:8px}.report-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.report-grid .panel{margin:0}
.login-bg{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0e2526,#123d3d)}.login-card{width:min(430px,92vw);background:#fff;border-radius:22px;padding:32px;box-shadow:0 30px 70px #0005;display:flex;flex-direction:column;gap:11px}.login-card h1{margin:3px 0}.login-card p{color:var(--muted);margin:0 0 12px}.login-card button{margin-top:8px;padding:13px}.login-card small{text-align:center;color:var(--muted)}
@media(max-width:950px){.side{position:static;width:100%;height:auto}.side nav{display:grid;grid-template-columns:repeat(3,1fr)}main{margin:0}.cards{grid-template-columns:1fr 1fr}.grid-form{grid-template-columns:1fr 1fr}.report-grid{grid-template-columns:1fr}}
@media(max-width:600px){main{padding:16px}.side nav{grid-template-columns:1fr 1fr}.cards,.grid-form,.invoice-head,.line-row{grid-template-columns:1fr}.report-grid{display:block}.report-grid .panel{margin-bottom:14px}}