:root{
    --navy:#12365c;
    --blue:#1f4e79;
    --sky:#eaf2fb;
    --ink:#1d2733;
    --muted:#64748b;
    --line:#d8e3f0;
    --bg:#f4f7fb;
    --card:#ffffff;
    --success:#0f766e;
    --error:#b42318;
}
*{box-sizing:border-box}
body{
    margin:0;
    font-family:Inter,Segoe UI,Arial,sans-serif;
    color:var(--ink);
    background:linear-gradient(135deg,#eef5ff 0%,#f8fafc 42%,#eef7f9 100%);
}
.app-shell{max-width:1180px;margin:0 auto;padding:32px 20px 64px}
.hero{
    display:grid;
    grid-template-columns:minmax(0,1fr) 320px;
    gap:24px;
    align-items:stretch;
    margin-bottom:22px;
}
.hero>div:first-child,.hero-card,.panel,.preview,.alert{
    background:rgba(255,255,255,.92);
    border:1px solid var(--line);
    box-shadow:0 18px 45px rgba(15,35,64,.08);
    border-radius:24px;
}
.hero>div:first-child{padding:32px}
.eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--blue);
    background:var(--sky);
    border:1px solid #c9dbef;
    padding:7px 12px;
    border-radius:999px;
    font-size:12px;
    font-weight:800;
    letter-spacing:.08em;
    text-transform:uppercase;
}
h1{margin:18px 0 10px;font-size:34px;line-height:1.08;color:var(--navy)}
.hero p,.section-head p,.actions p,small{color:var(--muted);line-height:1.55}
.hero p{max-width:760px;margin:0;font-size:16px}
.hero-card{
    padding:28px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    background:linear-gradient(145deg,var(--navy),var(--blue));
    color:white;
}
.hero-card strong{font-size:22px;margin-bottom:10px}
.hero-card span{color:#dbeafe;line-height:1.5}
.panel{padding:26px}
.form-section,.section-settings{border-top:1px solid var(--line);padding-top:24px;margin-top:24px}
.form-section:first-child{border-top:0;padding-top:0;margin-top:0}
.section-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}
.section-head span{
    width:38px;height:38px;border-radius:12px;
    display:grid;place-items:center;
    background:var(--blue);color:white;font-weight:800;
    flex:0 0 auto;
}
.section-head h2{margin:0 0 4px;color:var(--navy);font-size:21px}
.section-head p{margin:0}
.grid{display:grid;gap:18px;margin-bottom:18px}
.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid.compact{margin-bottom:0}
.field{display:flex;flex-direction:column;gap:8px}
label{font-weight:800;color:#24364b;font-size:14px}
input,textarea,select{
    width:100%;
    border:1px solid #cbd8e8;
    background:#fff;
    border-radius:14px;
    padding:12px 14px;
    font:inherit;
    color:var(--ink);
    outline:none;
    transition:.18s ease;
}
input:focus,textarea:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(31,78,121,.12)}
textarea{resize:vertical;min-height:96px}
small{font-size:12px}
.section-card{
    border:1px solid var(--line);
    border-radius:18px;
    background:#fbfdff;
    padding:0;
    margin:12px 0;
    overflow:hidden;
}
.section-card summary{
    cursor:pointer;
    padding:16px 18px;
    font-weight:900;
    color:var(--blue);
    background:linear-gradient(90deg,#eef6ff,#fff);
}
.section-card[open] summary{border-bottom:1px solid var(--line)}
.section-card .grid,.section-card .field{margin:18px}
.actions{
    display:flex;
    align-items:center;
    gap:18px;
    justify-content:space-between;
    border-top:1px solid var(--line);
    padding-top:24px;
    margin-top:24px;
}
button,.button{
    appearance:none;
    border:0;
    cursor:pointer;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    text-decoration:none;
    color:white;
    background:linear-gradient(135deg,var(--blue),var(--navy));
    border-radius:14px;
    padding:14px 22px;
    font-weight:900;
    box-shadow:0 12px 25px rgba(18,54,92,.22);
}
button:hover,.button:hover{transform:translateY(-1px)}
.alert,.preview{padding:22px;margin:0 0 22px}
.alert h2,.preview h2{margin:0 0 8px;color:var(--navy)}
.alert p{margin:4px 0;color:var(--muted)}
.alert.success{border-color:#99f6e4;background:#f0fdfa}
.alert.error{border-color:#fecaca;background:#fff1f2}
.alert.error p{color:var(--error);font-weight:800}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:white}
table{width:100%;border-collapse:collapse;min-width:760px}
th{background:var(--blue);color:white;text-align:left;font-size:13px;padding:13px}
td{padding:12px 13px;border-top:1px solid var(--line);font-size:13px}
td:first-child{font-weight:800;color:var(--blue)}
@media(max-width:860px){
    .hero,.grid.two,.grid.four{grid-template-columns:1fr}
    .actions{align-items:flex-start;flex-direction:column}
    h1{font-size:28px}
    .app-shell{padding:18px 12px 48px}
    .hero>div:first-child,.panel,.preview,.alert{padding:20px;border-radius:20px}
}