:root{
  --bg:#f6f8fb; --surface:#ffffff; --text:#0f172a; --muted:#64748b;
  --primary:#009688; --primary-2:#00bfa5; --accent:#f59e0b;
  --border:#e2e8f0; --danger:#dc2626; --success:#059669;
  --shadow:0 10px 30px -12px rgba(2,8,23,.18);
  --radius:14px;
}
[data-theme="dark"]{
  --bg:#0b1220; --surface:#111a2e; --text:#e6edf7; --muted:#94a3b8;
  --border:#1f2a44; --shadow:0 10px 30px -10px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
html[lang="ar"] body{font-family:'Tajawal',sans-serif}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

.topbar{display:flex;align-items:center;gap:1rem;padding:.85rem 1.5rem;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.brand{font-weight:800;font-size:1.4rem;letter-spacing:.5px;display:flex;align-items:center;gap:.25rem}
.logo-mark{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;padding:.2rem .55rem;border-radius:8px}
.logo-pro{color:var(--text)}
.mainnav{display:flex;gap:1.1rem;flex:1;justify-content:center;flex-wrap:wrap}
.mainnav a{color:var(--text);font-weight:500}
.btn-primary{background:var(--primary);color:#fff !important;padding:.45rem .9rem;border-radius:10px}
.btn-primary:hover{background:var(--primary-2);text-decoration:none}
.topbar-actions{display:flex;gap:.5rem;align-items:center}
.lang-select,.theme-toggle{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:.35rem .55rem;cursor:pointer}
[data-theme="dark"] .t-sun{display:none}
[data-theme="light"] .t-moon{display:none}

.page{flex:1;padding:1.5rem;max-width:1280px;margin:0 auto;width:100%}
.site-footer{padding:1rem 1.5rem;border-top:1px solid var(--border);background:var(--surface);display:flex;justify-content:space-between;color:var(--muted);font-size:.9rem;flex-wrap:wrap;gap:.5rem}

/* Hero / landing */
.hero{position:relative;padding:5rem 1.5rem;text-align:center;border-radius:24px;overflow:hidden;background:linear-gradient(135deg,#0f172a 0%,#0b3b3a 50%,#005f56 100%);color:#fff;box-shadow:var(--shadow)}
.hero canvas{position:absolute;inset:0;width:100%;height:100%}
.hero h1{font-size:clamp(2rem,5vw,3.5rem);margin:0 0 1rem;font-weight:800;position:relative}
.hero p{font-size:1.1rem;opacity:.92;margin:0 auto 1.5rem;max-width:640px;position:relative}
.hero .cta{display:inline-flex;gap:.7rem;position:relative}
.hero .btn{padding:.8rem 1.4rem;border-radius:12px;font-weight:600}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.3)}

/* Feature cards */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;margin-top:2.5rem}
.feature-card{background:var(--surface);padding:1.4rem;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);transition:transform .25s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card .ico{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-2));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.3rem;margin-bottom:.7rem}
.feature-card h3{margin:.3rem 0}

/* Cards / forms */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);margin-bottom:1.2rem}
.card h2{margin-top:0}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:.25rem}
input,select,textarea{width:100%;padding:.55rem .7rem;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);font:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:1px}
.btn{display:inline-block;padding:.6rem 1.1rem;border-radius:10px;border:0;cursor:pointer;font-weight:600;background:var(--primary);color:#fff}
.btn:hover{background:var(--primary-2)}
.btn-outline{background:transparent;color:var(--primary);border:1px solid var(--primary)}
.btn-danger{background:var(--danger)}
.btn-row{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1rem}

/* Tables */
table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--radius);overflow:hidden}
th,td{padding:.7rem .9rem;text-align:start;border-bottom:1px solid var(--border)}
th{background:var(--bg);font-size:.85rem;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
.badge{display:inline-block;padding:.15rem .55rem;border-radius:999px;font-size:.75rem;font-weight:600}
.badge.pending{background:#fef3c7;color:#92400e}
.badge.approved{background:#d1fae5;color:#065f46}
.badge.disabled{background:#fee2e2;color:#991b1b}
.badge.draft{background:#e2e8f0;color:#334155}
.badge.sent{background:#dbeafe;color:#1e40af}
.badge.paid{background:#d1fae5;color:#065f46}
.badge.overdue{background:#fee2e2;color:#991b1b}
.badge.cancelled{background:#e2e8f0;color:#475569}

.alert{padding:.85rem 1rem;border-radius:10px;margin-bottom:1rem;border:1px solid var(--border)}
.alert.success{background:#ecfdf5;color:#065f46;border-color:#a7f3d0}
.alert.error{background:#fef2f2;color:#991b1b;border-color:#fecaca}
.alert.info{background:#eff6ff;color:#1e40af;border-color:#bfdbfe}

/* Dashboard layout */
.layout{display:grid;grid-template-columns:240px 1fr;gap:1.5rem}
@media (max-width:880px){.layout{grid-template-columns:1fr}}
.sidebar{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;height:fit-content;position:sticky;top:80px}
.sidebar a{display:block;padding:.55rem .7rem;border-radius:8px;color:var(--text);margin-bottom:.2rem}
.sidebar a.active,.sidebar a:hover{background:var(--bg);text-decoration:none;color:var(--primary)}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.2rem}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem 1.2rem;box-shadow:var(--shadow)}
.stat .v{font-size:1.8rem;font-weight:800}
.stat .l{color:var(--muted);font-size:.85rem;text-transform:uppercase;letter-spacing:.5px}

/* Calendar */
.calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;margin-top:1rem}
.calendar .day,.calendar .dow{background:var(--surface);border:1px solid var(--border);padding:.5rem;min-height:90px;border-radius:8px;font-size:.8rem;position:relative}
.calendar .dow{min-height:auto;text-align:center;font-weight:700;color:var(--muted)}
.calendar .day.other{opacity:.4}
.calendar .day .num{font-weight:700;font-size:.9rem}
.calendar .ev{background:var(--primary);color:#fff;padding:2px 5px;border-radius:4px;font-size:.7rem;margin-top:3px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.barcode-box{font-family:monospace;background:var(--bg);padding:.7rem;border-radius:8px;border:1px dashed var(--border);word-break:break-all}