/* ===========================
   MÀU CHỦ ĐẠO – CAM
   =========================== */
:root {
  --green:   #ff8a00;   /* cam đậm (navbar, nút) */
  --green-2: #ffb347;   /* cam nhạt (button phụ, chatbox) */
  --green-3: #fff4e5;   /* nền cam lợt, dùng cho background */
}

/* ===========================
   THANH TRÊN (TOPBAR)
   =========================== */
.topbar {
  background: var(--green);
  font-size: 0.9rem;
}

/* ===========================
   HEADER / LOGO TEXT
   =========================== */
.header .brand {
  color: var(--green);
  font-size: 1.4rem;
  font-weight: bold;
}
.text-green {
  color: var(--green);
}

/* ===========================
   BUTTON
   =========================== */
.btn-green {
  background: var(--green);
  color: #fff;
  border: none;
  transition: background 0.2s;
}
.btn-green:hover {
  background: #ff6a00;  /* cam đậm hơn khi hover */
  color: #fff;
}

/* ===========================
   NAVBAR
   =========================== */
.nav-green {
  background: var(--green);
}

.nav-green .nav-link {
  color: #fff;
  opacity: 0.9;
  transition: opacity 0.2s;
}

.nav-green .nav-link:hover,
.nav-green .nav-link.active {
  opacity: 1;
  color: #fff;
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
  background: linear-gradient(90deg, var(--green) 0%, var(--green-2) 100%);
  padding: 18px 0 26px;
}

.hero .hero-box {
  background:
    url('../img/hero-med.jpg') right bottom / contain no-repeat,
    linear-gradient(90deg, rgba(255,255,255,.20), rgba(255,255,255,.05));
  min-height: 220px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 0.75rem;
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  background: #cc6d00;  /* cam đậm hơn để chữ trắng dễ đọc */
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer a:hover {
  text-decoration: underline;
}

/* ===========================
   CHATBOX
   =========================== */
#chatbox {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 320px;
  z-index: 9999;
}

#chatbox .card-header {
  background: var(--green);
  color: #fff;
  font-weight: 600;
}

#chatbox .btn-green {
  background: var(--green-2);
}

/* ===========================
   SERVICE CARDS
   =========================== */
.service-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 28px 20px;
  background: #fff7ef;          /* nền cam rất nhẹ */
  border: 1px solid #ffe5c2;
  border-radius: 14px;
  text-decoration: none;
  color: #7a3c00;
  text-align: center;
  height: 100%;
  transition:
    transform .15s ease,
    box-shadow .15s ease,
    border-color .15s ease,
    background .15s ease;
}

.service-card i {
  font-size: 36px;
  color: var(--green);
  line-height: 1;
}

.service-card span {
  font-size: 18px;
  font-weight: 600;
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 22px rgba(0,0,0,.06);
  border-color: #ffcd8f;
  background: #ffffff;
}