:root{
    --bg:#f3f7fc;
    --panel:#ffffff;
    --panel-soft:#f8fbff;
    --text:#12253d;
    --muted:#6a7a92;
    --line:#dbe5f1;
    --primary:#2b6cf6;
    --primary-dark:#1c55c7;
    --danger:#dc4458;
    --danger-soft:#fff0f3;
    --success:#1f9a61;
    --success-soft:#ecfff5;
    --shadow:0 14px 34px rgba(18,37,61,.08);
    --radius:20px;
    --radius-sm:14px;
    --sidebar-width:280px;
    --content-max:1480px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    font-family:Arial,Helvetica,sans-serif;
    color:var(--text);
    background:linear-gradient(180deg,#f8fbff 0%,#eef4fb 100%);
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{margin:0}
p{margin:0 0 12px}
label{display:block;font-weight:700;margin:0 0 8px}
input,select,textarea,button{font:inherit}
input,select,textarea{
    width:100%;
    border:1px solid var(--line);
    border-radius:14px;
    background:#fff;
    color:var(--text);
    padding:13px 14px;
    min-height:48px;
}
input:focus,select:focus,textarea:focus{
    outline:none;
    border-color:var(--primary);
    box-shadow:0 0 0 4px rgba(43,108,246,.12);
}
textarea{min-height:120px;resize:vertical}
button,.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 16px;
    min-height:46px;
    border-radius:14px;
    border:none;
    background:#eef4ff;
    color:#17396a;
    font-weight:700;
    cursor:pointer;
    text-decoration:none;
    transition:transform .15s ease, background .15s ease, box-shadow .15s ease;
}
button:hover,.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(18,37,61,.08)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-danger{background:var(--danger-soft);color:#8d2533}
.btn-sm{min-height:38px;padding:9px 12px;font-size:14px}
.small{font-size:13px}
.muted,.topbar-subtitle{color:var(--muted)}
.center{text-align:center}
.mt-2{margin-top:16px}
.mt-3{margin-top:24px}
.wrap{flex-wrap:wrap}
.stack-md > * + *{margin-top:16px}
.stack-lg > * + *{margin-top:22px}
.button-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.inline-form{display:flex;flex-direction:column;gap:12px;align-items:stretch}
.grid-2,.grid-3{display:grid;grid-template-columns:1fr;gap:16px}
.full-span{grid-column:1/-1}
.icon-btn{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
    background:#fff;color:var(--text);cursor:pointer;
}
.flash{
    margin:0 auto 16px;
    max-width:var(--content-max);
    padding:14px 16px;
    border-radius:16px;
    box-shadow:var(--shadow);
}
.flash.success{background:var(--success-soft);color:#166440}
.flash.error{background:#fff0f2;color:#a23140}

/* Layout */
.site-shell{min-height:100vh}
.mobile-overlay{
    position:fixed;inset:0;background:rgba(9,20,34,.45);opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:39;
}
.sidebar{
    position:fixed;top:0;left:0;bottom:0;width:min(86vw,var(--sidebar-width));
    background:#10243a;color:#fff;padding:18px 16px 18px;
    transform:translateX(-105%);transition:transform .22s ease;z-index:40;
    display:flex;flex-direction:column;gap:18px;overflow:auto;
}
body.nav-open .sidebar{transform:translateX(0)}
body.nav-open .mobile-overlay{opacity:1;pointer-events:auto}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-size:26px;font-weight:800}
.brand a{color:#fff}
.nav-close{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.12);color:#fff}
.side-nav{display:flex;flex-direction:column;gap:6px}
.nav-link{
    display:flex;align-items:center;gap:10px;
    color:#d7e7ff;padding:12px 14px;border-radius:14px;
}
.nav-link:hover{background:rgba(255,255,255,.08)}
.nav-link.is-active{background:#fff;color:#10243a}
.nav-link-danger{margin-top:6px;background:rgba(255,75,98,.16);color:#ffd8df}
.nav-icon{width:20px;text-align:center;flex:0 0 20px}
.sidebar-footer{margin-top:auto;color:#bbcae4;font-size:13px;line-height:1.45}
.content-shell{min-height:100vh}
.topbar{
    position:sticky;top:0;z-index:20;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:14px 16px;border-bottom:1px solid rgba(219,229,241,.8);
    background:rgba(248,251,255,.92);backdrop-filter:blur(10px);
}
.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
.page-heading{min-width:0}
.topbar h1{font-size:24px;line-height:1.1;margin-bottom:4px}
.topbar-user{
    max-width:40vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
    border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 14px;box-shadow:var(--shadow);
}
.hamburger{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:14px;border:1px solid var(--line);
    background:#fff;color:var(--text);font-size:20px;
}
.main-content{padding:16px}
.card{
    background:var(--panel);border:1px solid rgba(219,229,241,.95);border-radius:var(--radius);
    box-shadow:var(--shadow);margin:0 auto 18px;max-width:var(--content-max);overflow:hidden;
}
.card-header{
    padding:16px;border-bottom:1px solid var(--line);
    display:flex;flex-direction:column;align-items:flex-start;gap:12px;background:var(--panel-soft);
}
.card-header h2{font-size:20px}
.card-actions{display:flex;gap:10px;flex-wrap:wrap;width:100%}
.card-body{padding:16px}

.stats-grid{max-width:var(--content-max);margin:0 auto 18px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:18px}
.stat-value{font-size:28px;font-weight:800}
.stat-label{margin-top:6px;color:var(--muted)}

.week-grid{display:grid;grid-template-columns:1fr;gap:14px}
.day-card{border:1px solid var(--line);background:#fff;border-radius:18px;padding:16px;display:flex;flex-direction:column;gap:12px}
.day-card h3{font-size:18px}
.meal-item,.meal-block{border:1px solid #e6eef8;background:#f9fbff;border-radius:16px;padding:14px}
.meal-name{font-size:15px;font-weight:700;line-height:1.4;margin:6px 0}

.list-grid{display:grid;grid-template-columns:1fr;gap:14px}
.list-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:16px;box-shadow:0 6px 18px rgba(18,37,61,.04)}
.list-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:10px}
.list-card-title{font-size:18px;font-weight:800}
.list-card-meta{display:grid;gap:8px}
.meta-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;border-top:1px dashed #e8eef6;padding-top:8px}
.meta-label{color:var(--muted);font-size:14px}
.list-card-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#eef4ff;color:#19407a;font-size:12px;font-weight:700}

.form-section{display:grid;gap:14px}
.field-hint{font-size:13px;color:var(--muted);margin-top:6px}
.availability-grid{display:grid;grid-template-columns:1fr;gap:12px}
.availability-card{border:1px solid var(--line);border-radius:18px;padding:14px;background:#fbfdff}
.availability-row{display:grid;grid-template-columns:1fr;gap:12px;margin-top:12px}
.preference-grid{display:grid;grid-template-columns:1fr;gap:12px}
.preference-card{border:1px solid var(--line);border-radius:18px;padding:14px;background:#fff}
.preference-flags{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px}
.flag-check{display:flex;align-items:center;gap:8px;padding:10px 12px;border:1px solid #e6eef8;border-radius:14px;background:#f9fbff;font-size:14px}
.flag-check input{width:18px;height:18px;min-height:18px;padding:0;margin:0}

.table-responsive{width:100%;overflow:auto;-webkit-overflow-scrolling:touch}
.table{width:100%;border-collapse:collapse;min-width:720px}
.table th,.table td{padding:12px 10px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.table thead th{position:sticky;top:0;background:#f7fbff;z-index:1}
.preferences-table{min-width:980px}

.info-grid{display:grid;grid-template-columns:1fr;gap:12px}
.info-box{border:1px solid var(--line);border-radius:16px;padding:14px;background:#fbfdff}

.auth-layout{min-height:100vh}
.auth-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px}
.auth-card{width:100%;max-width:560px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:24px}
.auth-card-large{max-width:760px}
.alert-box{padding:18px;border-radius:16px;border:1px solid var(--line);background:#f9fbff}
.success-box{background:var(--success-soft);border-color:#cbeed8}

@media (min-width: 700px){
    .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
    .inline-form{flex-direction:row;align-items:end;flex-wrap:wrap}
    .stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
    .week-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .availability-row{grid-template-columns:repeat(2,minmax(0,1fr))}
    .preference-flags{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (min-width: 1024px){
    .mobile-overlay{display:none!important}
    .sidebar{
        transform:none;position:sticky;top:0;width:auto;height:100vh;z-index:1;
        padding:24px 18px;
    }
    .nav-close,.hamburger{display:none}
    .site-shell{display:grid;grid-template-columns:var(--sidebar-width) minmax(0,1fr)}
    .content-shell{min-width:0}
    .topbar{padding:22px 28px;position:sticky}
    .topbar h1{font-size:32px}
    .main-content{padding:0 28px 28px}
    .card-header{padding:18px 22px;flex-direction:row;justify-content:space-between;align-items:center}
    .card-actions{width:auto}
    .card-body{padding:22px}
    .week-grid{grid-template-columns:repeat(7,minmax(0,1fr))}
    .day-card{min-height:260px}
    .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
    .list-grid.two-col{grid-template-columns:repeat(2,minmax(0,1fr))}
    .availability-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .preference-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}