/* =====================================================================
   DELTA EFFICIENCY — SHARED DESIGN SYSTEM
   One stylesheet for every user + admin page. Import with:
   <link rel="stylesheet" href="/assets/css/design-system.css">
   Depends on: Big Shoulders Display, IBM Plex Sans, IBM Plex Mono (Google Fonts)
   ===================================================================== */

:root{
  /* fixed brand anchors — do not change with theme */
  --ink:#0E1512;
  --paper:#F5F1E8;
  --accent-amber:#F2A93B;
  --accent-red:#C4453B;
  --accent-green:#4F9E7A;

  /* theme-adaptive tokens — DARK defaults live here */
  --bg:#0E1512;
  --bg-2:#141C18;
  --text:#F5F1E8;
  --muted:#8B9490;
  --muted-2:#5c645f;
  --line:rgba(139,148,144,.25);
  --line-soft:rgba(139,148,144,.18);
  --surface1:rgba(20,28,24,.65);
  --surface2:rgba(14,21,18,.4);
  --amber-text:#F2A93B;
  --red-text:#C4453B;
  --green-text:#4F9E7A;
  --nav-bg:rgba(14,21,18,.86);
  --grid-line:rgba(139,148,144,.06);
  --ghost-border:rgba(245,241,232,.3);
  --input-bg:rgba(20,28,24,.55);
  --shadow-soft:0 2px 6px rgba(0,0,0,.15), 0 30px 50px -24px rgba(0,0,0,.5);
  --display:'Big Shoulders Display', sans-serif;
  --body:'IBM Plex Sans', sans-serif;
  --mono:'IBM Plex Mono', monospace;
  --radius:3px;
}

html[data-theme="light"]{
  --bg:#F5F1E8;
  --bg-2:#ECE5D3;
  --text:#14201B;
  --muted:#5b645f;
  --muted-2:#8a8f89;
  --line:rgba(20,28,24,.14);
  --line-soft:rgba(20,28,24,.1);
  --surface1:rgba(255,255,255,.6);
  --surface2:rgba(237,231,216,.4);
  --amber-text:#9C6412;
  --red-text:#A33328;
  --green-text:#2F7856;
  --nav-bg:rgba(245,241,232,.88);
  --grid-line:rgba(20,28,24,.05);
  --ghost-border:rgba(20,28,24,.25);
  --input-bg:rgba(255,255,255,.7);
  --shadow-soft:0 2px 6px rgba(20,28,24,.06), 0 30px 50px -24px rgba(20,28,24,.2);
}

*{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }

body{
  background:var(--bg); color:var(--text);
  font-family:var(--body);
  line-height:1.5;
  transition:background .35s ease, color .35s ease;
  perspective:1800px;
}

::selection{ background:var(--accent-amber); color:var(--ink); }
a{ color:inherit; text-decoration:none; }
img,svg{ display:block; max-width:100%; }

h1,h2,h3,h4{
  font-family:var(--display); font-weight:800; letter-spacing:-.01em; line-height:1; text-transform:uppercase;
}
p{ color:var(--muted); }
button{ font-family:inherit; cursor:pointer; }
input,select,textarea{ font-family:var(--body); }

.container{ max-width:1240px; margin:0 auto; padding:0 clamp(1.25rem,4vw,3rem); perspective:1400px; }
.container-narrow{ max-width:880px; margin:0 auto; padding:0 clamp(1.25rem,4vw,3rem); }

.eyebrow{
  font-family:var(--mono); font-size:.72rem; letter-spacing:.22em; text-transform:uppercase;
  color:var(--amber-text); display:flex; align-items:center; gap:.6rem; margin-bottom:.9rem;
}
.eyebrow::before{ content:''; width:22px; height:1px; background:var(--amber-text); }

.reveal{
  opacity:0; transform:translateY(28px) rotateX(8deg); transform-origin:50% 100%;
  transition:opacity .8s cubic-bezier(.16,.8,.24,1), transform .8s cubic-bezier(.16,.8,.24,1);
}
.reveal.in{ opacity:1; transform:translateY(0) rotateX(0); }

@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
  html{ scroll-behavior:auto; }
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}

/* ================= PAGE SHELL ================= */
.page-shell{ padding-top:5.5rem; min-height:100svh; display:flex; flex-direction:column; }
.page-main{ flex:1; padding:2.6rem 0 4rem; }
.page-head{ margin-bottom:2.2rem; }
.page-head h1{ font-size:clamp(1.9rem, 4vw, 2.6rem); }
.page-head p{ margin-top:.6rem; max-width:60ch; }
.page-head-row{ display:flex; align-items:flex-end; justify-content:space-between; gap:1.5rem; flex-wrap:wrap; }

/* ================= NAV ================= */
header.site-header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  background:var(--nav-bg); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transform-style:preserve-3d;
  transition:background .35s ease, border-color .35s ease, box-shadow .4s ease;
}
header.site-header.scrolled{ box-shadow:0 18px 40px -22px rgba(0,0,0,.5); }

.navwrap{ display:flex; align-items:center; justify-content:space-between; padding:.85rem clamp(1.25rem,4vw,3rem); gap:1rem; }

.logo{
  display:flex; align-items:center; gap:.6rem;
  font-family:var(--display); font-weight:800; font-size:1.1rem; letter-spacing:.02em; text-transform:uppercase; white-space:nowrap;
}
.logo svg{ width:24px; height:24px; }
.logo .tag-role{
  font-family:var(--mono); font-size:.62rem; letter-spacing:.08em; text-transform:uppercase;
  color:var(--amber-text); border:1px solid var(--line); border-radius:999px; padding:.15rem .55rem; margin-left:.3rem;
}

nav.links{ display:flex; gap:1.8rem; margin-right:auto; margin-left:2.2rem; font-family:var(--mono); font-size:.76rem; letter-spacing:.04em; text-transform:uppercase; }
nav.links a{ color:var(--muted); transition:color .25s; position:relative; padding-bottom:.2rem; }
nav.links a:hover{ color:var(--amber-text); }
nav.links a.active{ color:var(--text); }
nav.links a.active::after{ content:''; position:absolute; left:0; right:0; bottom:-1rem; height:2px; background:var(--accent-amber); }

.nav-right{ display:flex; align-items:center; gap:.7rem; }

.nav-cta{
  font-family:var(--mono); font-size:.74rem; letter-spacing:.05em; text-transform:uppercase;
  background:var(--accent-amber); color:var(--ink); padding:.6rem 1.1rem; border-radius:2px; font-weight:600;
  box-shadow:0 1px 0 rgba(0,0,0,.25), 0 6px 14px -6px rgba(242,169,59,.55);
  transition:background .2s, transform .2s, box-shadow .2s;
}
.nav-cta:hover{ background:#ffbe57; transform:translateY(-2px) translateZ(4px); box-shadow:0 3px 0 rgba(0,0,0,.25), 0 12px 22px -8px rgba(242,169,59,.6); }

.theme-toggle{
  width:36px; height:36px; border-radius:50%; border:1px solid var(--line); background:transparent; color:var(--text);
  display:flex; align-items:center; justify-content:center; transition:border-color .2s, transform .2s; flex-shrink:0;
}
.theme-toggle:hover{ border-color:var(--amber-text); transform:translateY(-1px) translateZ(3px) rotate(8deg); }
.theme-toggle svg{ width:16px; height:16px; }

.icon-moon{ display:none; }
html[data-theme="light"] .icon-sun{ display:none; }
html[data-theme="light"] .icon-moon{ display:block; }

.user-chip{
  display:flex; align-items:center; gap:.55rem; padding:.35rem .7rem .35rem .4rem;
  border:1px solid var(--line); border-radius:999px; font-family:var(--mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.03em;
}
.user-chip .avatar{
  width:26px; height:26px; border-radius:50%; background:var(--accent-amber); color:var(--ink);
  display:flex; align-items:center; justify-content:center; font-family:var(--display); font-weight:800; font-size:.75rem;
}

.burger{ display:none; flex-direction:column; gap:5px; background:none; border:none; }
.burger span{ width:22px; height:2px; background:var(--text); }

@media (max-width:960px){
  nav.links{ display:none; }
  .burger{ display:flex; }
}

/* nav mobile open state */
nav.links.links-open{
  display:flex; flex-direction:column;
  position:absolute; top:100%; left:0; right:0;
  background:var(--nav-bg); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  padding:1rem clamp(1.25rem,4vw,3rem);
  gap:1rem;
}

/* ================= BUTTONS ================= */
.btn{
  font-family:var(--mono); font-size:.8rem; letter-spacing:.05em; text-transform:uppercase;
  padding:.85rem 1.4rem; border-radius:2px; font-weight:600;
  display:inline-flex; align-items:center; gap:.55rem; justify-content:center;
  transition:transform .2s, background .2s, border-color .2s, box-shadow .2s;
  border:1px solid transparent; transform-style:preserve-3d;
}
.btn-primary{ background:var(--accent-amber); color:var(--ink); box-shadow:0 2px 0 #a8721c, 0 8px 18px -6px rgba(0,0,0,.4); }
.btn-primary:hover{ background:#ffbe57; transform:translateY(-3px) translateZ(6px); box-shadow:0 4px 0 #a8721c, 0 16px 28px -8px rgba(0,0,0,.42); }
.btn-primary:active{ transform:translateY(0) translateZ(0); box-shadow:0 1px 0 #a8721c, 0 4px 10px -4px rgba(0,0,0,.4); }
.btn-ghost{ border-color:var(--ghost-border); color:var(--text); background:transparent; }
.btn-ghost:hover{ border-color:var(--text); transform:translateY(-3px) translateZ(6px); }
.btn-danger{ background:transparent; border-color:var(--red-text); color:var(--red-text); }
.btn-danger:hover{ background:var(--red-text); color:var(--paper); transform:translateY(-2px); }
.btn-sm{ padding:.55rem .95rem; font-size:.72rem; }
.btn[disabled]{ opacity:.45; pointer-events:none; }

/* ================= TILT CARD (3D) ================= */
.tilt-card{
  --rx:0deg; --ry:0deg; --tz:0px;
  transform-style:preserve-3d;
  transform:perspective(1000px) rotateX(var(--rx)) rotateY(var(--ry)) translateZ(var(--tz));
  transition:transform .6s cubic-bezier(.16,.8,.24,1), box-shadow .6s ease;
  box-shadow:0 1px 2px rgba(0,0,0,.08);
  will-change:transform;
}
.tilt-card.is-hovering{ transition:transform .08s linear, box-shadow .2s ease; box-shadow:var(--shadow-soft); }
.tilt-card > *{ transform:translateZ(16px); transform-style:preserve-3d; }

/* ================= SURFACE / PANEL ================= */
.panel{
  background:var(--surface1); border:1px solid var(--line); border-radius:var(--radius);
  padding:1.6rem; box-shadow:var(--shadow-soft);
}
.panel-flush{ padding:0; overflow:hidden; }
.panel-head{ display:flex; align-items:center; justify-content:space-between; gap:1rem; padding:1.2rem 1.5rem; border-bottom:1px solid var(--line); flex-wrap:wrap; }
.panel-head h2, .panel-head h3{ font-size:1.05rem; text-transform:none; letter-spacing:0; }
.panel-body{ padding:1.5rem; }

/* ================= STAT CARDS ================= */
.stat-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(200px, 1fr)); gap:1.1rem; margin-bottom:2.2rem; }
.stat-card{
  background:var(--surface1); border:1px solid var(--line); border-radius:var(--radius); padding:1.3rem 1.4rem;
}
.stat-card .stat-label{ font-family:var(--mono); font-size:.68rem; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); }
.stat-card .stat-value{ font-family:var(--display); font-size:2rem; font-weight:800; margin-top:.5rem; }
.stat-card .stat-delta{ font-family:var(--mono); font-size:.72rem; margin-top:.4rem; display:flex; align-items:center; gap:.35rem; }
.stat-delta.up{ color:var(--green-text); }
.stat-delta.down{ color:var(--red-text); }
.stat-delta.flat{ color:var(--muted); }

/* ================= BADGES ================= */
.badge{
  display:inline-flex; align-items:center; gap:.4rem; font-family:var(--mono); font-size:.68rem;
  letter-spacing:.05em; text-transform:uppercase; padding:.3rem .65rem; border-radius:999px;
  border:1px solid transparent;
}
.badge::before{ content:''; width:6px; height:6px; border-radius:50%; background:currentColor; }
.badge-green{ color:var(--green-text); background:color-mix(in srgb, var(--green-text) 14%, transparent); border-color:color-mix(in srgb, var(--green-text) 35%, transparent); }
.badge-amber{ color:var(--amber-text); background:color-mix(in srgb, var(--amber-text) 14%, transparent); border-color:color-mix(in srgb, var(--amber-text) 35%, transparent); }
.badge-red{ color:var(--red-text); background:color-mix(in srgb, var(--red-text) 14%, transparent); border-color:color-mix(in srgb, var(--red-text) 35%, transparent); }
.badge-muted{ color:var(--muted); background:var(--surface2); border-color:var(--line); }

/* ================= TABLE ================= */
.table-wrap{ overflow-x:auto; }
table.data-table{ width:100%; border-collapse:collapse; font-size:.9rem; }
table.data-table thead th{
  text-align:left; font-family:var(--mono); font-size:.68rem; letter-spacing:.06em; text-transform:uppercase;
  color:var(--muted); padding:.9rem 1.5rem; border-bottom:1px solid var(--line); white-space:nowrap;
}
table.data-table tbody td{ padding:1rem 1.5rem; border-bottom:1px solid var(--line-soft); vertical-align:middle; }
table.data-table tbody tr{ transition:background .15s; }
table.data-table tbody tr:hover{ background:var(--surface2); }
table.data-table tbody tr:last-child td{ border-bottom:none; }
.cell-strong{ font-weight:600; color:var(--text); }
.cell-mono{ font-family:var(--mono); font-size:.82rem; color:var(--muted); }
.row-actions{ display:flex; gap:.5rem; justify-content:flex-end; }
.empty-state{ text-align:center; padding:3.5rem 1.5rem; color:var(--muted); }
.empty-state h3{ font-size:1.2rem; color:var(--text); margin-bottom:.5rem; text-transform:none; }

/* ================= FORMS ================= */
.form-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:1.2rem; }
.field{ display:flex; flex-direction:column; gap:.45rem; }
.field label{ font-family:var(--mono); font-size:.7rem; letter-spacing:.05em; text-transform:uppercase; color:var(--muted); }
.field .hint{ font-size:.76rem; color:var(--muted-2); }
.field input[type="text"],
.field input[type="email"],
.field input[type="number"],
.field input[type="date"],
.field input[type="password"],
.field select,
.field textarea{
  background:var(--input-bg); border:1px solid var(--line); border-radius:var(--radius); color:var(--text);
  padding:.75rem .9rem; font-size:.92rem; transition:border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--amber-text); box-shadow:0 0 0 3px color-mix(in srgb, var(--amber-text) 20%, transparent);
}
.field textarea{ resize:vertical; min-height:5.5rem; }
.field-row{ display:flex; gap:1rem; align-items:center; }
.form-actions{ display:flex; gap:.8rem; margin-top:1.6rem; flex-wrap:wrap; }
.checkbox-row{ display:flex; align-items:center; gap:.6rem; font-size:.88rem; }
.checkbox-row input{ width:16px; height:16px; accent-color:var(--accent-amber); }
.filter-bar{ display:flex; gap:.8rem; flex-wrap:wrap; align-items:center; margin-bottom:1.4rem; }
.filter-bar input, .filter-bar select{
  background:var(--input-bg); border:1px solid var(--line); border-radius:var(--radius); color:var(--text);
  padding:.6rem .85rem; font-size:.85rem;
}
.filter-bar .search{ flex:1; min-width:200px; }

/* ================= ALERTS ================= */
.alert{ display:flex; gap:.8rem; align-items:flex-start; padding:1rem 1.2rem; border-radius:var(--radius); border:1px solid var(--line); margin-bottom:1.4rem; font-size:.88rem; }
.alert-amber{ border-color:color-mix(in srgb, var(--amber-text) 40%, transparent); background:color-mix(in srgb, var(--amber-text) 10%, transparent); }
.alert-green{ border-color:color-mix(in srgb, var(--green-text) 40%, transparent); background:color-mix(in srgb, var(--green-text) 10%, transparent); }
.alert-red{ border-color:color-mix(in srgb, var(--red-text) 40%, transparent); background:color-mix(in srgb, var(--red-text) 10%, transparent); }

/* ================= PAGINATION ================= */
.pagination{ display:flex; align-items:center; justify-content:space-between; gap:1rem; padding:1.1rem 1.5rem; flex-wrap:wrap; }
.pagination .pages{ display:flex; gap:.4rem; }
.pagination button, .pagination a{
  width:32px; height:32px; display:flex; align-items:center; justify-content:center;
  border:1px solid var(--line); border-radius:var(--radius); font-family:var(--mono); font-size:.78rem; color:var(--muted);
}
.pagination .active{ background:var(--accent-amber); color:var(--ink); border-color:var(--accent-amber); }

/* ================= TABS ================= */
.tabs{ display:flex; gap:.4rem; border-bottom:1px solid var(--line); margin-bottom:1.6rem; }
.tabs a{
  padding:.8rem 1.1rem; font-family:var(--mono); font-size:.76rem; text-transform:uppercase; letter-spacing:.04em;
  color:var(--muted); border-bottom:2px solid transparent; margin-bottom:-1px;
}
.tabs a.active{ color:var(--text); border-color:var(--accent-amber); }

/* ================= FOOTER ================= */
footer.site-footer{ border-top:1px solid var(--line); padding:2rem 0; }
.footer-row{ display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; font-family:var(--mono); font-size:.75rem; color:var(--muted); }
.footer-links{ display:flex; gap:1.4rem; flex-wrap:wrap; }
.footer-links a:hover{ color:var(--amber-text); }

/* ================= MOBILE ================= */
@media (max-width:640px){
  .page-head-row{ flex-direction:column; align-items:flex-start; }
  table.data-table thead{ display:none; }
  table.data-table,
  table.data-table tbody,
  table.data-table tr,
  table.data-table td{ display:block; width:100%; }
  table.data-table tr{ border-bottom:1px solid var(--line); padding:1rem 0; }
  table.data-table td{ padding:.35rem 0; border:none; display:flex; justify-content:space-between; gap:1rem; }
  table.data-table td::before{ content:attr(data-label); font-family:var(--mono); font-size:.68rem; text-transform:uppercase; color:var(--muted); }
}