/* =====================================================================
   ECOLOGICS AFFILIATE & MLM BINARY PLATFORM — Design System
   Palette: White base / Green primary (from logo) / Gold-Yellow secondary
   ===================================================================== */

:root {
  /* Brand palette pulled from the E-cologics leaf-and-ring mark */
  --eco-green-900: #0d3d1c;
  --eco-green-700: #1a6b32;
  --eco-green-600: #1f8a3d;
  --eco-green-500: #2fa84e;   /* primary */
  --eco-green-100: #e5f5ea;
  --eco-green-50:  #f3fbf5;

  --eco-gold-700: #a8760a;
  --eco-gold-600: #c8940f;
  --eco-gold-500: #e0ac1c;   /* secondary */
  --eco-gold-300: #f0cc63;
  --eco-gold-100: #fdf3d9;

  --eco-white: #ffffff;
  --eco-ink-900: #16241a;
  --eco-ink-600: #4b5c50;
  --eco-ink-400: #8a9a8f;
  --eco-border: #e2ece4;
  --eco-danger: #c0392b;
  --eco-danger-bg: #fdecea;
  --eco-success-bg: #e8f7ec;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-card: 0 4px 24px rgba(13, 61, 28, 0.08);
  --shadow-pop: 0 10px 40px rgba(13, 61, 28, 0.16);

  --font-display: 'Poppins', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--eco-green-50);
  color: var(--eco-ink-900);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, .display {
  font-family: var(--font-display);
  color: var(--eco-green-900);
  margin: 0 0 .5rem;
  font-weight: 600;
}

a { color: var(--eco-green-600); text-decoration: none; }
a:hover { color: var(--eco-green-700); }

img { max-width: 100%; display: block; }

::selection { background: var(--eco-gold-300); color: var(--eco-green-900); }

:focus-visible {
  outline: 3px solid var(--eco-gold-500);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------------
   Auth Layout (Login / Register)
   --------------------------------------------------------------------- */
.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  background: linear-gradient(160deg, var(--eco-green-900) 0%, var(--eco-green-700) 45%, var(--eco-green-600) 100%);
}

.auth-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 3.5rem;
  color: var(--eco-white);
  overflow: hidden;
}

.auth-visual::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(224,172,28,.35), transparent 70%);
  border-radius: 50%;
}

.auth-visual::after {
  content: "";
  position: absolute;
  left: -12%;
  bottom: -18%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255,255,255,.10), transparent 70%);
  border-radius: 50%;
}

.auth-visual .brand-logo {
  width: 108px;
  height: auto;
  margin-bottom: 2rem;
  filter: drop-shadow(0 8px 20px rgba(0,0,0,.25));
}

.auth-visual h1 {
  color: var(--eco-white);
  font-size: 2.35rem;
  line-height: 1.15;
  max-width: 480px;
}

.auth-visual .accent { color: var(--eco-gold-300); }

.auth-visual p {
  color: rgba(255,255,255,.85);
  max-width: 440px;
  font-size: 1.02rem;
  line-height: 1.6;
}

.auth-stats {
  display: flex;
  gap: 2.25rem;
  margin-top: 2.5rem;
  position: relative;
  z-index: 1;
}

.auth-stats div strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--eco-gold-300);
}

.auth-stats div span {
  font-size: .8rem;
  color: rgba(255,255,255,.75);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.auth-form-panel {
  background: var(--eco-white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 2.5rem;
}

.auth-card {
  width: 100%;
  max-width: 440px;
}

.auth-card .mobile-logo { display: none; }

.auth-card h2 {
  font-size: 1.6rem;
}

.auth-card .subtitle {
  color: var(--eco-ink-600);
  margin-bottom: 1.75rem;
  font-size: .95rem;
}

/* ---------------------------------------------------------------------
   Forms
   --------------------------------------------------------------------- */
.form-group { margin-bottom: 1.15rem; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--eco-ink-900);
  margin-bottom: .4rem;
}

label .req { color: var(--eco-danger); }

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: .78rem .95rem;
  border: 1.5px solid var(--eco-border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: var(--font-body);
  background: var(--eco-white);
  color: var(--eco-ink-900);
  transition: border-color .15s ease, box-shadow .15s ease;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--eco-green-500);
  box-shadow: 0 0 0 4px rgba(47,168,78,.12);
  outline: none;
}

.help-text { font-size: .78rem; color: var(--eco-ink-400); margin-top: .3rem; }

.side-toggle {
  display: flex;
  gap: .75rem;
}

.side-toggle label {
  flex: 1;
  border: 1.5px solid var(--eco-border);
  border-radius: var(--radius-sm);
  padding: .7rem;
  text-align: center;
  cursor: pointer;
  font-weight: 600;
  color: var(--eco-ink-600);
  margin: 0;
  transition: all .15s ease;
}

.side-toggle input { display: none; }
.side-toggle input:checked + span { color: var(--eco-white); }
.side-toggle label:has(input:checked) {
  background: var(--eco-green-500);
  border-color: var(--eco-green-500);
  color: var(--eco-white);
}

/* ---------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.4rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .95rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform .1s ease, box-shadow .15s ease, background .15s ease;
  font-family: var(--font-body);
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--eco-green-600), var(--eco-green-500));
  color: var(--eco-white);
  box-shadow: 0 8px 20px rgba(47,168,78,.28);
}
.btn-primary:hover { background: linear-gradient(135deg, var(--eco-green-700), var(--eco-green-600)); color: var(--eco-white); }

.btn-gold {
  background: linear-gradient(135deg, var(--eco-gold-600), var(--eco-gold-500));
  color: var(--eco-green-900);
  box-shadow: 0 8px 20px rgba(224,172,28,.3);
}
.btn-gold:hover { background: linear-gradient(135deg, var(--eco-gold-700), var(--eco-gold-600)); color: var(--eco-green-900); }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--eco-green-500);
  color: var(--eco-green-600);
}
.btn-outline:hover { background: var(--eco-green-50); color: var(--eco-green-700); }

.btn-danger { background: var(--eco-danger); color: var(--eco-white); }
.btn-sm { padding: .5rem .9rem; font-size: .82rem; }
.btn-block { width: 100%; }

/* ---------------------------------------------------------------------
   Alerts
   --------------------------------------------------------------------- */
.alert {
  padding: .85rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: .88rem;
  margin-bottom: 1.1rem;
  border-left: 4px solid transparent;
}
.alert-error { background: var(--eco-danger-bg); color: var(--eco-danger); border-color: var(--eco-danger); }
.alert-success { background: var(--eco-success-bg); color: var(--eco-green-700); border-color: var(--eco-green-500); }
.alert-info { background: var(--eco-gold-100); color: var(--eco-gold-700); border-color: var(--eco-gold-500); }

/* ---------------------------------------------------------------------
   App Shell (Dashboard + Admin)
   --------------------------------------------------------------------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  background: linear-gradient(180deg, var(--eco-green-900), var(--eco-green-700));
  color: var(--eco-white);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: transform .2s ease;
  z-index: 40;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: 1.4rem 1.4rem 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.sidebar-brand img { width: 40px; }
.sidebar-brand span { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: .02em; }
.sidebar-brand small { display: block; color: var(--eco-gold-300); font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; }

.nav-group { padding: 1rem .8rem; }
.nav-label { font-size: .68rem; text-transform: uppercase; letter-spacing: .1em; color: rgba(255,255,255,.5); margin: 1rem .6rem .4rem; }

.nav-link {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .68rem .9rem;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,.82);
  font-size: .89rem;
  font-weight: 500;
  margin-bottom: .15rem;
}
.nav-link:hover { background: rgba(255,255,255,.08); color: var(--eco-white); }
.nav-link.active { background: var(--eco-gold-500); color: var(--eco-green-900); font-weight: 700; }
.nav-link .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: .6; }

.main-area { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.75rem;
  background: var(--eco-white);
  border-bottom: 1px solid var(--eco-border);
  position: sticky;
  top: 0;
  z-index: 30;
}

.topbar .menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--eco-green-700);
}

.topbar-title h1 { font-size: 1.15rem; margin: 0; }
.topbar-title small { color: var(--eco-ink-400); font-size: .78rem; }

.topbar-user { display: flex; align-items: center; gap: .8rem; }
.avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--eco-gold-500), var(--eco-green-500));
  color: var(--eco-white); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .9rem;
}

.page-content { padding: 1.75rem; max-width: 1400px; width: 100%; margin: 0 auto; }

/* ---------------------------------------------------------------------
   Cards / Stats / Tables
   --------------------------------------------------------------------- */
.grid { display: grid; gap: 1.25rem; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--eco-white);
  border: 1px solid var(--eco-border);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  box-shadow: var(--shadow-card);
}

.card-title {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--eco-ink-400);
  margin-bottom: .3rem;
  font-weight: 700;
}

.stat-card { position: relative; overflow: hidden; }
.stat-card .stat-value { font-family: var(--font-display); font-size: 1.7rem; color: var(--eco-green-800, var(--eco-green-700)); font-weight: 700; }
.stat-card .stat-icon {
  position: absolute; right: 1.1rem; top: 1.1rem;
  width: 42px; height: 42px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--eco-green-100); color: var(--eco-green-600); font-size: 1.2rem;
}
.stat-card.gold .stat-icon { background: var(--eco-gold-100); color: var(--eco-gold-700); }
.stat-card .stat-trend { font-size: .78rem; color: var(--eco-green-600); margin-top: .3rem; }

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 2rem 0 1rem;
}
.section-title h2 { font-size: 1.05rem; margin: 0; }

table { width: 100%; border-collapse: collapse; font-size: .88rem; }
thead th {
  text-align: left;
  padding: .8rem 1rem;
  background: var(--eco-green-50);
  color: var(--eco-green-800, var(--eco-green-700));
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 1px solid var(--eco-border);
}
tbody td { padding: .8rem 1rem; border-bottom: 1px solid var(--eco-border); color: var(--eco-ink-900); }
tbody tr:hover { background: var(--eco-green-50); }
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--eco-border); background: var(--eco-white); }

.badge {
  display: inline-block;
  padding: .25rem .65rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.badge-green { background: var(--eco-green-100); color: var(--eco-green-700); }
.badge-gold { background: var(--eco-gold-100); color: var(--eco-gold-700); }
.badge-gray { background: #eef1ef; color: var(--eco-ink-600); }
.badge-red { background: var(--eco-danger-bg); color: var(--eco-danger); }

/* ---------------------------------------------------------------------
   Binary Tree Visualization
   --------------------------------------------------------------------- */
.binary-tree-wrap { overflow-x: auto; padding: 1.5rem .5rem; }
.tree { display: flex; flex-direction: column; align-items: center; }
.tree-node-row { display: flex; justify-content: center; }
.tree-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0 auto;
}
.node-box {
  min-width: 128px;
  padding: .6rem .8rem;
  border-radius: var(--radius-sm);
  background: var(--eco-white);
  border: 2px solid var(--eco-green-500);
  text-align: center;
  font-size: .78rem;
  box-shadow: var(--shadow-card);
}
.node-box.empty { border-style: dashed; border-color: var(--eco-ink-400); color: var(--eco-ink-400); }
.node-box.inactive { border-color: var(--eco-gold-500); }
.node-box strong { display: block; font-size: .82rem; color: var(--eco-green-800, var(--eco-green-700)); }
.node-children { display: flex; gap: 2.5rem; margin-top: 1.75rem; position: relative; }
.node-children::before {
  content: "";
  position: absolute;
  top: -1.75rem;
  left: 50%;
  width: 1px;
  height: 1.75rem;
  background: var(--eco-border);
}

/* ---------------------------------------------------------------------
   Landing minimal footer note / misc
   --------------------------------------------------------------------- */
.muted { color: var(--eco-ink-400); }
.text-right { text-align: right; }
.flex { display: flex; align-items: center; }
.gap-sm { gap: .5rem; }
.gap-md { gap: 1rem; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ---------------------------------------------------------------------
   Responsive
   --------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .auth-shell { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .auth-card .mobile-logo { display: flex; justify-content: center; margin-bottom: 1.5rem; }
  .auth-card .mobile-logo img { width: 84px; }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: 0; top: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-pop);
  }
  .sidebar.open { transform: translateX(0); }
  .topbar .menu-toggle { display: block; }
  .page-content { padding: 1.1rem; }
  .auth-form-panel { padding: 2rem 1.25rem; }
  .node-children { gap: 1rem; }
  .node-box { min-width: 100px; font-size: .7rem; }
}

@media (max-width: 480px) {
  .auth-card h2 { font-size: 1.35rem; }
  .topbar-title h1 { font-size: 1rem; }
}

.sidebar-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(13,61,28,.45);
  z-index: 35;
}
.sidebar-backdrop.show { display: block; }