:root {
  --green-main: #2e7d32;
  --green-light: #e5f6e8;
  --green-dark: #1b5e20;
  --accent: #ffd54f;
  --border-color: #dde5dd;
  --bg-body: #f4f7f4;
  --text-main: #1f2933;
  --text-muted: #6b7280;
  --danger: #e53935;
  --radius-lg: 14px;
  --radius-md: 10px;
  --shadow-soft: 0 10px 30px rgba(15, 94, 35, 0.08);
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-body); color: var(--text-main);
}

/* HEADER */
.app-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 5vw;
  background: linear-gradient(90deg, var(--green-main), var(--green-dark));
  color: white; box-shadow: 0 4px 12px rgba(0,0,0,.12);
}

.header-left { display: flex; align-items: center; gap: 14px; }
.logo { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; background: white; padding: 4px; }
.header-title { display: flex; flex-direction: column; }
.brand-name { font-weight: 700; font-size: 20px; letter-spacing: .5px; }
.brand-subtitle { font-size: 13px; opacity: .9; }
.header-right { display: flex; align-items: center; gap: 12px; }
.user-info { font-size: 13px; }

/* NAV */
.main-nav { display: flex; align-items: center; gap: 8px; margin: 0 16px; }
.nav-link {
  background: transparent; border-radius: 999px; border: none; padding: 6px 12px;
  font-size: 13px; color: #e9f5eb; cursor: pointer; transition: background .15s, color .15s, transform .1s;
}
.nav-link:hover { background: rgba(255,255,255,.16); transform: translateY(-1px); }
.nav-link.active { background: #fff; color: var(--green-main); }

/* Disabled tabs for non-owner */
.nav-link.disabled { opacity: .5; cursor: not-allowed; }
.nav-link.disabled:hover { background: transparent; transform: none; }

/* 3-gach */
.hamburger {
  display: none; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.5); background: transparent; padding: 0;
  align-items: center; justify-content: center; flex-direction: column; gap: 4px; cursor: pointer;
}
.hamburger span { width: 18px; height: 2px; background: #fff; border-radius: 999px; transition: transform .2s, opacity .2s; }
.hamburger.open span:nth-child(1){ transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2){ opacity: 0; }
.hamburger.open span:nth-child(3){ transform: translateY(-6px) rotate(-45deg); }

/* LAYOUT */
main { padding: 24px 5vw 40px; }
.section { max-width: 1200px; margin: 0 auto; }
.section-landing { margin-top: 24px; }
.hidden { display: none !important; }

/* LANDING */
.landing-grid { display: grid; grid-template-columns: minmax(0,3fr) minmax(0,2fr); gap: 24px; align-items: center; }
.landing-text h1 { font-size: 30px; margin-bottom: 12px; }
.landing-text p { font-size: 15px; color: var(--text-muted); max-width: 480px; }
.landing-bullets { margin-top: 12px; padding-left: 20px; color: var(--text-main); font-size: 14px; }
.landing-bullets li + li { margin-top: 6px; }
.landing-footer { margin-top: 28px; text-align: center; font-size: 13px; color: var(--text-muted); }

/* CARD */
.card {
  background: #fff; border-radius: var(--radius-lg); padding: 18px 18px 20px;
  box-shadow: var(--shadow-soft); border: 1px solid #e0ece1;
}
.card h2 { margin-top: 0; font-size: 18px; }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; }

/* LOGIN CARD */
.login-card { max-width: 380px; margin-left: auto; }
.login-card h2 { text-align: center; }

/* FORM */
.form-grid { display: grid; gap: 10px; }
.form-row { display: flex; flex-direction: column; gap: 4px; }
.form-row.two-col { display: grid; grid-template-columns: 1.5fr .8fr; gap: 8px; }
.form-inline { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); align-items: end; }

label { font-size: 13px; color: var(--text-muted); }
input, select, textarea {
  padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border-color);
  font-size: 14px; outline: none; transition: border-color .15s, box-shadow .15s; background: #fff;
}
input:focus, select:focus, textarea:focus { border-color: var(--green-main); box-shadow: 0 0 0 1px rgba(46,125,50,.15); }
textarea { resize: vertical; }

/* Buttons */
button { font-family: inherit; }
.btn-primary, .btn-secondary, .btn-danger, .btn-link {
  border-radius: 999px; padding: 8px 16px; font-size: 14px; border: none; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 4px; white-space: nowrap;
}
.btn-primary { background: linear-gradient(135deg,#2e7d32,#1b5e20); color: #fff; box-shadow: 0 6px 14px rgba(27,94,32,.25); }
.btn-primary:hover { background: linear-gradient(135deg,#29692d,#174f1a); transform: translateY(-.5px); }
.btn-secondary { background: #fff; color: var(--green-main); border: 1px solid rgba(46,125,50,.3); }
.btn-secondary:hover { background: #f3faf4; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c62828; }
.btn-link { background: transparent; color: var(--green-main); padding-inline: 0; }
.btn-link.small { font-size: 13px; }
.small { padding: 4px 10px; font-size: 12px; }
.full-width { width: 100%; }

/* DASHBOARD GRID */
.dashboard-grid { display: grid; grid-template-columns: minmax(0,2fr) minmax(0,3fr); gap: 20px; }
.dashboard-grid > .card:nth-child(3), .dashboard-grid > .card:nth-child(4) { grid-column: 1 / -1; }

/* FARM VIETGAP CARD */
.farm-vietgap-card {
  display: flex; align-items: center; gap: 10px; background: linear-gradient(135deg,#e4f9e7,#c8f0cf);
  border: 1px solid #a5d8a9; border-radius: 12px; padding: 10px 14px; box-shadow: 0 2px 5px rgba(0,60,0,.08); margin-bottom: 14px;
}
.farm-vietgap-left { display: flex; align-items: center; }
.vietgap-logo-circle { width: 40px; height: 40px; border-radius: 50%; background: #fff; border: 2px solid #4caf50; display: flex; align-items: center; justify-content: center; }
.vg-text { font-weight: 700; color: #2e7d32; font-size: 16px; }
.farm-vietgap-info { flex: 1; }
.farm-vietgap-title { font-weight: 700; font-size: 14px; color: #1e4620; }
.farm-vietgap-detail { font-size: 13px; color: #245c2a; }
.farm-vietgap-note { font-size: 11px; color: #3d6f40; }
.farm-vietgap-status { font-size: 22px; color: #2c882e; }

/* TREE LIST */
.tree-list {
  display: flex; flex-direction: column; gap: 10px; max-height: 540px; overflow-y: auto; padding-right: 4px;
}
.tree-card {
  display: grid; grid-template-columns: minmax(0,3fr) minmax(0,2fr); gap: 8px;
  padding: 10px 12px; border-radius: var(--radius-md); border: 1px solid #e0ece1; background: #f9fbf9;
}
.tree-main { display: flex; flex-direction: column; gap: 2px; }
.tree-title { font-weight: 600; font-size: 15px; }
.tree-sub { font-size: 13px; color: var(--text-muted); }
.tree-health { font-size: 13px; margin-top: 3px; }
.tree-vietgap { font-size: 13px; color: var(--text-main); }
.tree-areaha { font-size: 13px; color: var(--text-main); }
.tree-disease { font-size: 12px; color: #b45309; }
.tree-actions { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; align-items: flex-start; }

/* STAFF & ACTIVITY */
.staff-list { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.staff-row { display: flex; justify-content: space-between; align-items: center; border-radius: var(--radius-md); padding: 6px 10px; background: #f7faf7; border: 1px solid #e2efe4; font-size: 14px; }

.activity-list { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; max-height: 260px; overflow-y: auto; }
.activity-item { border-radius: var(--radius-md); border: 1px solid #e2efe4; padding: 8px 10px; background: #f7faf7; font-size: 13px; }
.activity-meta { color: var(--text-muted); font-size: 12px; }

/* MODALS */
.modal { position: fixed; inset: 0; z-index: 30; display: flex; align-items: center; justify-content: center; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(15,23,42,.55); }
.modal-content {
  position: relative; z-index: 1; background: #fff; border-radius: var(--radius-lg); padding: 18px 18px 20px;
  box-shadow: 0 18px 40px rgba(15,23,42,.35); max-width: 560px; width: 100%;
}
.modal-qr { text-align: center; max-width: 320px; }
.modal-qr img { width: 220px; height: 220px; margin-bottom: 12px; }
.modal-actions { margin-top: 10px; display: flex; justify-content: flex-end; gap: 8px; }

/* DISEASE */
.disease-list {
  border-radius: var(--radius-md); border: 1px solid #e2efe4; padding: 8px 10px; max-height: 220px; overflow-y: auto;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 4px 8px; font-size: 13px;
}
.disease-item { display: flex; align-items: center; gap: 6px; }

/* STATUS */
.status-row { display: flex; gap: 6px; }
.status-row select { flex: 1; }

/* DISPLAY CONFIG */
.display-config-grid {
  margin-top: 10px; border-radius: var(--radius-md); border: 1px solid #e2efe4; padding: 10px 10px 8px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 6px; font-size: 13px;
}
.display-config-grid label { display: flex; align-items: center; gap: 6px; }
.text-muted { font-size: 13px; color: var(--text-muted); }

/* TREE TOOLBAR */
.tree-toolbar { margin: 8px 0 10px; display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.tree-tabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 2px; }
.tree-tabs .tab { border-radius: 999px; }
.tree-tabs .tab.active { background: var(--green-main); color: #fff; border-color: var(--green-main); }
.tree-search { position: relative; max-width: 260px; width: 100%; }
.tree-search input { width: 100%; padding-right: 28px; }
.search-icon { position: absolute; right: 9px; top: 50%; transform: translateY(-50%); font-size: 13px; color: var(--text-muted); pointer-events: none; }

/* Floating contact (public.html dùng) */
.floating-contact { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 999; }
.contact-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 46px; height: 46px; border-radius: 999px; font-size: 12px; font-weight: 600; color: #fff; text-decoration: none; box-shadow: 0 4px 10px rgba(0,0,0,.25); padding: 0 14px; }
.zalo-btn { background: #008fe5; }
.fb-btn { background: #1877f2; }

/* ====== Extras (Trường tuỳ biến) ====== */
.extras-list { display: flex; flex-direction: column; gap: 8px; border: 1px solid #e2efe4; padding: 8px; border-radius: 10px; max-height: 260px; overflow-y: auto; }
.extras-row {
  display: grid; grid-template-columns: 1.2fr 1.5fr auto auto; gap: 8px; align-items: center;
  background: #f9fbf9; border: 1px solid #e2efe4; border-radius: 8px; padding: 8px;
}
.ex-label, .ex-value { width: 100%; }
.ex-toggle { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-main); }
.empty-row { padding: 10px; text-align: center; color: var(--text-muted); }

/* AREA (ha) – addons */
.form-row .with-suffix { position: relative; }
.form-row .with-suffix input[type="number"],
.form-row .with-suffix input[type="text"] { padding-right: 56px; }
.input-suffix { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); font-size: 13px; color: var(--text-muted); pointer-events: none; }

/* Number arrows hidden */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; }

/* RESPONSIVE */
@media (max-width: 900px) {
  .app-header { padding-inline: 4vw; flex-wrap: wrap; row-gap: 6px; }
  .header-left { flex: 1 1 auto; }
  .header-right { width: 100%; justify-content: space-between; font-size: 12px; }
  main { padding: 16px 4vw 32px; }
  .landing-grid { grid-template-columns: minmax(0,1fr); gap: 16px; }
  .landing-text h1 { font-size: 22px; }
  .landing-text p, .landing-bullets { font-size: 13px; }
  .login-card { max-width: 100%; margin: 0; }
  .dashboard-grid { grid-template-columns: minmax(0,1fr); gap: 16px; }
  .tree-card { grid-template-columns: minmax(0,1fr); padding: 10px; }
  .tree-main { gap: 3px; }
  .tree-title { font-size: 14px; }
  .tree-sub, .tree-health, .tree-vietgap, .tree-disease { font-size: 12px; }
  .tree-toolbar { flex-direction: column; align-items: stretch; }
  .tree-search { max-width: none; }
  .main-nav { order: 3; width: 100%; margin: 6px 0 0; padding-top: 6px; border-top: 1px solid rgba(255,255,255,.25); display: none; justify-content: flex-start; flex-wrap: wrap; }
  .main-nav.open { display: flex; }
  .hamburger { display: inline-flex; }
}

@media (max-width: 600px) {
  .brand-name { font-size: 18px; }
  .brand-subtitle { font-size: 11px; }
  .user-info { font-size: 11px; }
  .tree-actions { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
  .tree-actions .btn-secondary, .tree-actions .btn-danger { flex: 0 0 auto; font-size: 11px; padding: 5px 9px; }
  .staff-row, .activity-item { font-size: 12px; }
  .activity-meta { font-size: 11px; }
  .floating-contact { right: 12px; bottom: 12px; gap: 6px; }
  .contact-btn { min-width: 44px; height: 44px; font-size: 11px; padding: 0 12px; }
}

/* DESKTOP NAV */
@media (min-width: 901px) {
  .hamburger { display: none; }
}