/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --green-dark:   #2d6a4f;
  --green-mid:    #40916c;
  --green-light:  #74c69d;
  --green-pale:   #d8f3dc;
  --yellow:       #f4a261;
  --red:          #e63946;
  --bg:           #f0f7f4;
  --card-bg:      #ffffff;
  --text:         #1b3a2d;
  --muted:        #6b8f71;
  --radius:       12px;
  --shadow:       0 2px 12px rgba(0,0,0,0.08);
}

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Nav ── */
nav {
  background: var(--green-dark);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

nav .brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav a {
  color: var(--green-pale);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 6px 14px;
  border-radius: 20px;
  transition: background 0.2s;
}

nav a:hover, nav a.active {
  background: var(--green-mid);
  color: #fff;
}

/* ── Page wrapper ── */
.page {
  max-width: 860px;
  margin: 40px auto;
  padding: 0 20px;
}

h1 {
  font-size: 1.7rem;
  color: var(--green-dark);
  margin-bottom: 24px;
}

/* ── Cards ── */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary   { background: var(--green-mid);  color: #fff; }
.btn-secondary { background: var(--green-pale); color: var(--green-dark); }
.btn-scan      { background: var(--green-dark); color: #fff; font-size: 1rem; padding: 12px 28px; }

.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }

/* ── Scanner ── */
#camera-wrap {
  position: relative;
  width: 100%;
  background: #111;
  border-radius: 10px;
  overflow: hidden;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

#camera-wrap video,
#camera-wrap img#preview {
  width: 100%;
  max-height: 340px;
  object-fit: contain;
  display: block;
}

#placeholder-text {
  color: #aaa;
  font-size: 0.9rem;
}

#file-input { display: none; }

/* ── Bin selector ── */
.field-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.field-row label { font-weight: 600; white-space: nowrap; }

select {
  padding: 8px 12px;
  border: 1px solid #cde;
  border-radius: 8px;
  font-size: 0.95rem;
  background: #fff;
  color: var(--text);
  flex: 1;
}

/* ── Spinner ── */
.spinner {
  display: none;
  width: 22px; height: 22px;
  border: 3px solid var(--green-pale);
  border-top-color: var(--green-dark);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto;
}
.spinner.active { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Result card ── */
#result-card { display: none; }
#result-card.visible { display: block; }

.result-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  align-items: start;
}

.result-label { font-weight: 600; color: var(--muted); }
.result-value { color: var(--text); }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}
.badge-yes { background: var(--green-pale); color: var(--green-dark); }
.badge-no  { background: #fde8e8; color: var(--red); }

/* ── Dashboard ── */
.live-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 0.9rem;
  color: var(--muted);
}

.live-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #ccc;
  display: inline-block;
}
.live-dot.connected { background: #4caf50; animation: pulse 1.5s infinite; }
@keyframes pulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

/* Bin grid */
#bins-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.bin-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  border-left: 5px solid var(--green-light);
  transition: border-color 0.3s;
}
.bin-card.warning { border-left-color: var(--yellow); }
.bin-card.full    { border-left-color: var(--red); }

.bin-name { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.bin-location { font-size: 0.82rem; color: var(--muted); margin-bottom: 12px; }

.fill-bar-bg {
  background: #e8f5e9;
  border-radius: 6px;
  height: 10px;
  overflow: hidden;
  margin-bottom: 6px;
}
.fill-bar {
  height: 100%;
  border-radius: 6px;
  background: var(--green-light);
  transition: width 0.5s ease, background 0.3s;
}
.fill-bar.warning { background: var(--yellow); }
.fill-bar.full    { background: var(--red); }

.fill-label { font-size: 0.82rem; color: var(--muted); margin-bottom: 10px; }

.bin-meta { font-size: 0.85rem; }
.bin-meta span { display: block; color: var(--muted); }
.bin-meta strong { color: var(--text); }

/* ── Activity Log ── */
#activity-log {
  max-height: 220px;
  overflow-y: auto;
  font-size: 0.88rem;
}

.log-entry {
  padding: 7px 0;
  border-bottom: 1px solid #eef3ee;
  display: flex;
  gap: 10px;
}
.log-time { color: var(--muted); white-space: nowrap; }
.log-msg  { color: var(--text); }

/* ── Error ── */
.error-msg {
  background: #fde8e8;
  color: var(--red);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.9rem;
  margin-top: 12px;
  display: none;
}
.error-msg.visible { display: block; }

/* ── Admin panel ── */
.admin-bin-row {
  border: 1px solid #e0ede5;
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 14px;
  background: #fafffe;
}

.admin-bin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 1rem;
}

.admin-bin-fields {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  align-items: end;
}

.admin-bin-fields label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
}

.btn-danger {
  background: var(--red);
  color: #fff;
}

.badge-warn { background: #fff3e0; color: #b26a00; }

/* ── Analytics stat boxes ── */
.stat-box {
  background: var(--green-pale);
  border-radius: 10px;
  padding: 14px 16px;
  text-align: center;
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--green-dark);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 4px;
}

@media (max-width: 600px) {
  .admin-bin-fields {
    grid-template-columns: 1fr;
  }
}

/* ── Disposal Guide ── */
#guide-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.guide-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border-left: 5px solid var(--green-light);
  transition: box-shadow 0.2s;
}

.guide-card:hover { box-shadow: 0 4px 18px rgba(0,0,0,0.12); }

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
}

.guide-card-header:hover { background: #f5faf7; }

.guide-icon   { font-size: 1.6rem; flex-shrink: 0; }
.guide-name   { font-size: 1.05rem; font-weight: 700; color: var(--text); flex: 1; }
.guide-badges { display: flex; gap: 8px; flex-wrap: wrap; }

.guide-chevron {
  font-size: 0.8rem;
  color: var(--muted);
  transition: transform 0.25s;
  flex-shrink: 0;
}

.guide-card.open .guide-chevron { transform: rotate(180deg); }

.guide-card-body {
  display: none;
  padding: 0 20px 20px;
  border-top: 1px solid #eef3ee;
}

.guide-card.open .guide-card-body { display: block; }

.bin-tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 14px 0 16px;
}

.guide-steps {
  padding-left: 22px;
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.8;
}

.guide-steps li { margin-bottom: 4px; }