assets/css/style.css

/* ==========================================================================
   LEAF_AI — Clean Pure-White Organic Agrotech Theme (Light Mode)
   Phong cách trang nhã, nền trắng tinh khôi (#ffffff), sắc xanh nông nghiệp tự nhiên.
   Đảm bảo 100% không còn nền tối/đen/xám đen, chia tab/page rõ ràng và trực quan.
   ========================================================================== */

:root {
  /* Nền & Thẻ — Tinh khôi màu trắng */
  --bg-body: #ffffff;
  --bg-card: #ffffff;
  --bg-card-subtle: #ffffff;
  --bg-green-light: #f0fdf4;
  --bg-green-soft: #dcfce7;
  
  /* Viền & Đường phân cách */
  --border-light: #e2e8f0;
  --border-subtle: #f1f5f9;
  --border-green: #bbf7d0;
  --border-green-active: #86efac;
  
  /* Màu sắc chủ đạo Nông nghiệp (Tự nhiên, tươi mát) */
  --primary-green: #16a34a;       /* Xanh lá chuẩn */
  --primary-green-hover: #15803d; /* Xanh đậm hơn khi hover */
  --primary-forest: #14532d;      /* Xanh đậm thương hiệu */
  --primary-emerald: #059669;
  
  /* Màu trạng thái & Bệnh cây */
  --color-orange: #ea580c;        /* Úa sớm (Early blight) */
  --color-red: #dc2626;           /* Đốm vi khuẩn / Sương mai */
  --color-amber: #d97706;         /* Đốm lá Septoria */
  --color-teal: #0d9488;          /* Phấn trắng */
  
  /* Chữ & Độ tương phản */
  --text-main: #0f172a;           /* Chữ chính đen xám đậm rõ nét */
  --text-secondary: #334155;      /* Chữ phụ */
  --text-muted: #64748b;          /* Chữ mờ / Chú thích */
  --text-green: #15803d;
  
  /* Đổ bóng tự nhiên thanh thoát */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-card: 0 2px 8px -1px rgba(0, 0, 0, 0.05), 0 1px 3px -1px rgba(0, 0, 0, 0.03);
  --shadow-hover: 0 8px 18px -2px rgba(0, 0, 0, 0.07), 0 3px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-green: 0 4px 12px rgba(22, 163, 74, 0.18);

  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-body);
  color: var(--text-main);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  padding-bottom: var(--safe-bottom);
  line-height: 1.5;
}

/* ==========================================================================
   MULTI-PAGE ROUTING SYSTEM (.page-view)
   ========================================================================== */

.page-view {
  display: none;
  animation: fadeInPage 0.22s ease-in-out forwards;
}

.page-view.active {
  display: block;
}

@keyframes fadeInPage {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================================================
   TOP NAVBAR & NAVIGATION LINKS
   ========================================================================== */

.top-navbar-wrapper {
  background: #ffffff !important;
  border-color: var(--border-light) !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  z-index: 1030;
}

.brand-icon-wrap {
  transition: transform 0.2s ease;
}

.brand-icon-wrap:hover {
  transform: scale(1.05);
}

.brand-logo-text {
  font-weight: 900;
  font-size: 1.8rem;
  letter-spacing: 0.5px;
  color: var(--primary-forest);
  line-height: 1;
}

.brand-subtitle {
  font-size: 0.72rem;
  letter-spacing: 0.8px;
  color: var(--primary-green);
  text-transform: uppercase;
  font-weight: 700;
}

.nav-link-custom {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 14px !important;
  border-radius: 8px;
  transition: all 0.18s ease;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-link-custom:hover {
  color: var(--primary-green);
  background: var(--bg-green-light);
}

.nav-link-custom.active {
  color: var(--primary-forest);
  background: var(--bg-green-soft);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.project-info-card {
  background: var(--bg-green-light);
  border: 1px solid var(--border-green);
  border-radius: 10px;
  padding: 6px 14px;
}

/* ==========================================================================
   PANEL TRẮNG THANH LỊCH (GLASS-PANEL CLEAN WHITE)
   ========================================================================== */

.glass-panel {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-panel:hover {
  box-shadow: var(--shadow-hover);
  border-color: #cbd5e1;
}

.panel-header {
  border-bottom: 1px solid var(--border-light);
  padding: 12px 18px;
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.3px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  background: #ffffff;
  border-top-left-radius: 14px;
  border-top-right-radius: 14px;
}

.panel-body {
  padding: 18px;
  background: #ffffff;
  border-bottom-left-radius: 14px;
  border-bottom-right-radius: 14px;
}

/* ==========================================================================
   MODEL SWITCHER & SPECS
   ========================================================================== */

.model-switch-btn {
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s ease;
  font-weight: 600;
}

.model-switch-btn:hover {
  background: var(--bg-green-light);
  border-color: var(--border-green);
}

.model-switch-btn.active {
  background: var(--bg-green-light);
  border-color: var(--primary-green);
  color: var(--primary-forest);
  box-shadow: 0 2px 6px rgba(22, 163, 74, 0.12);
}

/* ==========================================================================
   FEATURES GRID TILES (Trang chủ)
   ========================================================================== */

.feature-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 12px 14px;
  height: 100%;
  transition: all 0.18s ease;
}

.feature-box:hover {
  transform: translateY(-2px);
  border-color: var(--primary-green);
  box-shadow: var(--shadow-card);
}

.feature-box.active-feat {
  border-color: var(--primary-green);
  background: #fafdfa;
}

.feature-icon-circle {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-green-light);
  color: var(--primary-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

/* ==========================================================================
   USER FLOW BAR (5 Bước trực quan)
   ========================================================================== */

.user-flow-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow-x: auto;
  padding: 10px 0;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  flex: 1;
  min-width: 135px;
}

.flow-step-num {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #ffffff;
  border: 2px solid #cbd5e1;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 6px;
  transition: all 0.25s ease;
}

.flow-step.active .flow-step-num {
  background: var(--primary-green);
  border-color: var(--primary-forest);
  color: #ffffff;
  box-shadow: 0 3px 10px rgba(22, 163, 74, 0.25);
}

.flow-step.completed .flow-step-num {
  background: var(--bg-green-soft);
  border-color: var(--primary-green);
  color: var(--primary-forest);
}

.flow-step-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
}

.flow-step-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   CANVAS & 3D BOTANICAL LEAF CONTAINER (Nền trắng)
   ========================================================================== */

.canvas-wrapper {
  position: relative;
  background: #ffffff;
  border-radius: 10px;
  border: 1px solid var(--border-light);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 310px;
}

#scanCanvas {
  max-width: 100%;
  height: auto;
  display: block;
}

#threeLeafContainer {
  height: 100%;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* ==========================================================================
   DIAGNOSIS RESULT CARDS & ALERTS
   ========================================================================== */

.coinfection-alert {
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 14px;
}

.primary-result-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-left: 5px solid var(--color-orange);
  border-radius: 10px;
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.gauge-circle {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-orange);
}

/* Secondary disease item */
.secondary-disease-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   DISEASE CARD & THUMB WRAP (HOÀN TOÀN MÀU TRẮNG, KHÔNG CÒN NỀN TỐI)
   ========================================================================== */

.disease-card {
  background: #ffffff !important;
  border: 1px solid var(--border-light) !important;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
}

.disease-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-green) !important;
  box-shadow: var(--shadow-hover);
}

.disease-thumb-wrap {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-green-light) !important;
  border: 1px solid var(--border-green) !important;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ==========================================================================
   HANDBOOK TABS & ITEMS (NỀN TRẮNG SẠCH)
   ========================================================================== */

.handbook-nav-btn {
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.82rem;
  padding: 6px 14px;
  border-radius: 8px;
  transition: all 0.18s ease;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.handbook-nav-btn:hover {
  background: var(--bg-green-light);
  color: var(--primary-green);
}

.handbook-nav-btn.active {
  background: var(--bg-green-soft);
  border-color: var(--primary-green);
  color: var(--primary-forest);
  font-weight: 700;
}

.handbook-card-item {
  background: #ffffff !important;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  transition: all 0.18s ease;
}

.handbook-card-item:hover {
  border-color: var(--border-green);
  box-shadow: var(--shadow-hover);
}

/* ==========================================================================
   HISTORY CARDS & ITEMS (NỀN TRẮNG SẠCH)
   ========================================================================== */

.history-card-item {
  background: #ffffff !important;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.18s ease;
}

.history-card-item:hover {
  border-color: #cbd5e1;
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   CHATBOT MESSAGES & CHIPS
   ========================================================================== */

.chat-chip-btn {
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-radius: 20px;
  padding: 4px 12px;
  transition: all 0.18s ease;
}

.chat-chip-btn:hover {
  background: var(--bg-green-light);
  border-color: var(--primary-green);
  color: var(--primary-forest);
}

.user-msg-bubble {
  background: var(--bg-green-light);
  border: 1px solid var(--border-green);
  color: var(--text-main);
  padding: 10px 14px;
  border-radius: 12px;
  display: inline-block;
  max-width: 85%;
  font-size: 13.5px;
}

.bot-msg-bubble {
  background: #ffffff;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  padding: 12px 16px;
  border-radius: 12px;
  display: inline-block;
  max-width: 85%;
  font-size: 13.5px;
  box-shadow: var(--shadow-sm);
}

/* Dropzone drag active */
.dropzone.drag-active {
  border-color: var(--primary-green) !important;
  background: var(--bg-green-light) !important;
}

/* Footer Banner */
.footer-banner {
  border-top: 1px solid var(--border-light);
  padding: 20px 0;
  margin-top: 30px;
  color: var(--text-muted);
  font-size: 0.88rem;
  background: #ffffff;
}

/* Nút bấm thương hiệu */
.btn-primary-agro {
  background: var(--primary-green);
  color: #ffffff;
  border: none;
  font-weight: 600;
  border-radius: 8px;
  padding: 8px 16px;
  box-shadow: var(--shadow-green);
  transition: all 0.2s ease;
}

.btn-primary-agro:hover {
  background: var(--primary-green-hover);
  color: #ffffff;
}

/* ==========================================================================
   MOBILE APP MODE (Thiết kế chế độ App điện thoại Native Nền Trắng)
   ========================================================================== */

.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-light);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04);
  z-index: 1040;
  justify-content: space-around;
  align-items: center;
  padding-bottom: var(--safe-bottom);
}

.mobile-nav-item {
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  transition: all 0.2s;
}

.mobile-nav-item i {
  font-size: 20px;
  margin-bottom: 2px;
}

.mobile-nav-item.active {
  color: var(--primary-green);
}

.mobile-fab-camera {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary-green);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 16px rgba(22, 163, 74, 0.4);
  margin-top: -24px;
  border: 4px solid #ffffff;
  cursor: pointer;
  transition: transform 0.18s ease;
}

.mobile-fab-camera:active {
  transform: scale(0.92);
}

/* Responsive Behavior */
@media (max-width: 991px) {
  body {
    padding-bottom: 74px;
  }
  
  .mobile-bottom-nav {
    display: flex;
  }

  .brand-logo-text {
    font-size: 1.5rem;
  }
}