:root {
  --ink: #1a2b33;
  --ink-soft: #4a5c64;
  --teal: #0d7377;
  --teal-dark: #095c5f;
  --accent: #c45c26;
  --sand: #f4f7f5;
  --line: #d7e3de;
  --font: "Google Sans Flex", "Google Sans", "Helvetica Neue", sans-serif;
}

*,
*::before,
*::after {
  font-family: var(--font);
}

html {
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  font-family: var(--font);
  font-weight: 300;
  letter-spacing: 0.01em;
  background:
    radial-gradient(900px 420px at 0% -10%, #d7ebe6 0%, transparent 55%),
    radial-gradient(700px 360px at 100% 0%, #f8e8da 0%, transparent 50%),
    linear-gradient(180deg, #f7faf8 0%, #eef3f1 100%);
}

/* Chữ thanh mảnh — hạn chế đậm */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: var(--font);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.fw-bold,
.fw-semibold,
.fw-bolder,
strong,
b,
.navbar-brand,
.btn,
.form-label,
.badge,
.stat-val,
.calc-est,
.step-num,
.hero-title,
.app-nav .nav-link.active {
  font-weight: 400 !important;
}

.text-muted {
  font-weight: 300;
  color: var(--ink-soft) !important;
}

.app-nav {
  background: linear-gradient(120deg, #0f2a3d 0%, #0d7377 80%);
  box-shadow: 0 6px 18px rgba(15, 42, 61, 0.18);
}

.app-nav .navbar-brand,
.app-nav .nav-link {
  font-weight: 300;
  letter-spacing: 0.02em;
}

.app-nav .nav-link.active {
  border-bottom: 1px solid rgba(255, 255, 255, 0.85);
}

.hero-panel {
  background: linear-gradient(135deg, #0f2a3d 0%, #0d7377 70%, #14919b 100%);
  color: #fff;
  border-radius: 1.1rem;
  padding: 1.6rem 1.7rem;
  box-shadow: 0 14px 28px rgba(15, 42, 61, 0.16);
}

.hero-title {
  font-size: 1.55rem;
  font-weight: 400;
  margin-bottom: 0.4rem;
}

.hero-lead {
  opacity: 0.92;
  font-weight: 300;
}

.step-card, .panel-card {
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: 0 8px 20px rgba(15, 42, 61, 0.04);
  background: #fff;
}

.step-num {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: var(--teal);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 400;
  margin-bottom: 0.6rem;
}

.btn {
  font-weight: 400;
  letter-spacing: 0.02em;
}

.btn-teal {
  --bs-btn-bg: var(--teal);
  --bs-btn-border-color: var(--teal);
  --bs-btn-hover-bg: var(--teal-dark);
  --bs-btn-hover-border-color: var(--teal-dark);
  --bs-btn-color: #fff;
  --bs-btn-hover-color: #fff;
  --bs-btn-active-bg: var(--teal-dark);
  --bs-btn-active-border-color: var(--teal-dark);
  --bs-btn-active-color: #fff;
}

.btn-outline-teal {
  --bs-btn-color: var(--teal);
  --bs-btn-border-color: var(--teal);
  --bs-btn-hover-bg: var(--teal);
  --bs-btn-hover-border-color: var(--teal);
  --bs-btn-hover-color: #fff;
}

.btn-accent {
  --bs-btn-bg: var(--accent);
  --bs-btn-border-color: var(--accent);
  --bs-btn-hover-bg: #a74c1f;
  --bs-btn-hover-border-color: #a74c1f;
  --bs-btn-color: #fff;
  --bs-btn-hover-color: #fff;
  --bs-btn-active-bg: #a74c1f;
  --bs-btn-active-border-color: #a74c1f;
  --bs-btn-active-color: #fff;
}

.text-bg-teal { background: var(--teal) !important; color: #fff !important; }
.bg-teal { background-color: var(--teal) !important; }
.bg-accent { background-color: var(--accent) !important; }
.text-teal { color: var(--teal) !important; }

.stat-tile {
  background: var(--sand);
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  padding: 0.85rem 0.9rem;
  height: 100%;
}
.stat-val {
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--teal-dark);
  line-height: 1.1;
}
.stat-lbl {
  font-size: 0.8rem;
  font-weight: 300;
  color: #5b6b66;
  margin-top: 0.2rem;
}

.log-box {
  max-height: 260px;
  overflow: auto;
  background: #0f2a3d;
  color: #d7efe9;
  border-radius: 0.7rem;
  padding: 0.85rem 1rem;
  font-size: 0.82rem;
  font-weight: 300;
}

.app-footer {
  border-top: 1px solid var(--line);
  font-weight: 300;
}

/* Bảng */
.table {
  font-weight: 300;
  --bs-table-bg: #fff;
}
.table > :not(caption) > * > * {
  vertical-align: middle;
  font-weight: 300;
}
.table thead th,
.table > thead > tr > th {
  font-weight: 400;
  letter-spacing: 0.02em;
  background: #f3f7f5;
}
.table-bordered {
  border-color: var(--line);
}
.table-bordered > :not(caption) > * > * {
  border-color: var(--line);
}
.table-hover > tbody > tr:hover > * {
  background-color: #eef6f4;
}

#qdImages img {
  object-fit: contain;
  max-height: 280px;
  background: #f8faf9;
}

.border-accent-calc {
  border: 1px solid #e7c4ae !important;
  box-shadow: 0 10px 24px rgba(196, 92, 38, 0.08);
}

.calc-result-tile {
  background: var(--sand);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  padding: 0.85rem 0.9rem;
  height: 100%;
  font-weight: 300;
}
.calc-result-tile.is-source {
  background: #e7f4f2;
  border-color: var(--teal);
}
.calc-est {
  font-size: 1.55rem;
  font-weight: 400;
  color: var(--teal-dark);
  line-height: 1.15;
  margin: 0.15rem 0;
}

#calcCard .nav-pills .nav-link {
  font-weight: 300;
}
#calcCard .nav-pills .nav-link.active {
  background: var(--teal);
  font-weight: 400;
}

.form-label,
.form-control,
.form-select,
.form-check-label {
  font-weight: 300;
}

.badge {
  font-weight: 400;
}

/* Ô danh sách mã: nhiều dòng cao, mã cách nhau bằng dấu phẩy, hết hàng mới xuống dòng */
.codes-box-wrap {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.45;
  resize: vertical;
}