/* ============================================================
   COMPONENTS — Buttons, Cards, Forms, Navigation
   ============================================================ */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-base);
  font-weight: 600;
  letter-spacing: .03em;
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-base),
              color            var(--transition-base),
              border-color     var(--transition-base),
              box-shadow       var(--transition-base),
              transform        var(--transition-fast);
}
.btn:active { transform: translateY(1px); }

/* Sizes */
.btn-sm  { padding: 8px 16px;  font-size: .875rem; }
.btn-md  { padding: 12px 24px; font-size: 1rem;    }
.btn-lg  { padding: 16px 36px; font-size: 1.125rem; }

/* Primary — emerald */
.btn-primary {
  background-color: var(--emerald-primary);
  color: var(--white);
  border-color: var(--emerald-primary);
}
.btn-primary:hover {
  background-color: var(--emerald-dark);
  border-color: var(--emerald-dark);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

/* Secondary — gold */
.btn-secondary {
  background-color: var(--gold-primary);
  color: var(--charcoal);
  border-color: var(--gold-primary);
}
.btn-secondary:hover {
  background-color: var(--gold-dark);
  border-color: var(--gold-dark);
  color: var(--dark);
  box-shadow: var(--shadow-md);
}

/* Outline — emerald border */
.btn-outline {
  background-color: transparent;
  color: var(--emerald-primary);
  border-color: var(--emerald-primary);
}
.btn-outline:hover {
  background-color: var(--emerald-primary);
  color: var(--white);
}

/* Outline gold */
.btn-outline-gold {
  background-color: transparent;
  color: var(--gold-primary);
  border-color: var(--gold-primary);
}
.btn-outline-gold:hover {
  background-color: var(--gold-primary);
  color: var(--charcoal);
}

/* Dark — dùng trên nền sáng/vàng */
.btn-dark {
  background-color: var(--dark);
  color: var(--white);
  border-color: var(--dark);
}
.btn-dark:hover {
  background-color: var(--charcoal);
  border-color: var(--charcoal);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

/* Ghost */
.btn-ghost {
  background-color: transparent;
  color: var(--charcoal);
  border-color: transparent;
}
.btn-ghost:hover { background-color: var(--light-gray); }

/* Outline white — dùng trên nền tối */
.btn-outline-white {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.55);
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  letter-spacing: .06em;
  border-radius: 0;
  text-decoration: none;
  transition: background var(--transition-base),
              border-color var(--transition-base),
              letter-spacing var(--transition-slow);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.85);
  color: var(--white);
  letter-spacing: .1em;
}

/* hero-btn — góc vuông, uppercase, letter-spacing, corner brackets vàng */
.btn.hero-btn {
  position: relative;
  border-radius: 0;
  overflow: visible;
  letter-spacing: .07em;
  text-transform: uppercase;
  font-size: .82rem;
  transition: background-color var(--transition-base),
              color            var(--transition-base),
              border-color     var(--transition-base),
              box-shadow       var(--transition-base),
              letter-spacing   var(--transition-slow);
}
.btn.hero-btn:hover { letter-spacing: .11em; }

.btn.hero-btn::before,
.btn.hero-btn::after {
  content: '';
  position: absolute;
  width: 9px;
  height: 9px;
  transition: width var(--transition-base), height var(--transition-base),
              top var(--transition-base), left var(--transition-base),
              bottom var(--transition-base), right var(--transition-base),
              opacity var(--transition-base);
  pointer-events: none;
}
.btn.hero-btn::before {
  top: -4px; left: -4px;
  border-top:  1.5px solid var(--gold-primary);
  border-left: 1.5px solid var(--gold-primary);
  opacity: .7;
}
.btn.hero-btn::after {
  bottom: -4px; right: -4px;
  border-bottom: 1.5px solid var(--gold-primary);
  border-right:  1.5px solid var(--gold-primary);
  opacity: .7;
}
.btn.hero-btn:hover::before { top: -6px; left: -6px; width: 13px; height: 13px; opacity: 1; }
.btn.hero-btn:hover::after  { bottom: -6px; right: -6px; width: 13px; height: 13px; opacity: 1; }

/* Full width */
.btn-block { width: 100%; }

/* ---- Cards ---- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

/* Project card */
.card-project {
  position: relative;
  display: flex;
  flex-direction: column;
}
.card-project .card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}
.card-project .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.card-project:hover .card-image img { transform: scale(1.06); }

.card-project .card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--gold-primary);
  color: var(--charcoal);
  font-size: .75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  letter-spacing: .05em;
  text-transform: uppercase;
}

.card-project .card-body { padding: var(--sp-md); flex: 1; }
.card-project .card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: var(--sp-xs);
}
.card-project .card-location {
  font-size: .875rem;
  color: var(--mid-gray);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: var(--sp-sm);
}
.card-project .card-price {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--emerald-primary);
  margin-bottom: var(--sp-sm);
}
.card-project .card-footer {
  padding: var(--sp-sm) var(--sp-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Blog card */
.card-blog {
  display: flex;
  flex-direction: column;
}
.card-blog .card-image {
  overflow: hidden;
  aspect-ratio: 16/9;
}
.card-blog .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.card-blog:hover .card-image img { transform: scale(1.05); }
.card-blog .card-body { padding: var(--sp-md); flex: 1; }
.card-blog .card-category {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--emerald-primary);
  margin-bottom: var(--sp-xs);
}
.card-blog .card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: var(--sp-xs);
  line-height: 1.4;
}
.card-blog .card-excerpt {
  font-size: .9rem;
  color: var(--mid-gray);
  line-height: 1.6;
  margin-bottom: var(--sp-sm);
}
.card-blog .card-meta {
  font-size: .8rem;
  color: var(--mid-gray);
  display: flex;
  gap: var(--sp-sm);
}

/* ---- Forms ---- */
.form-group { margin-bottom: var(--sp-md); }

.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 6px;
}
.form-label .required { color: var(--error); margin-left: 2px; }

.form-control {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--font-base);
  color: var(--charcoal);
  background-color: var(--white);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}
.form-control::placeholder { color: var(--mid-gray); }
.form-control:focus {
  outline: none;
  border-color: var(--emerald-primary);
  box-shadow: 0 0 0 3px rgba(5,150,105,.15);
}
.form-control.is-error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(239,68,68,.15);
}
.form-control.is-success { border-color: var(--success); }

textarea.form-control { resize: vertical; min-height: 120px; }

.form-error {
  font-size: .8rem;
  color: var(--error);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.form-hint {
  font-size: .8rem;
  color: var(--mid-gray);
  margin-top: 4px;
}

/* Select */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24'%3E%3Cpath fill='%239ca3af' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
  cursor: pointer;
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--emerald-primary);
  cursor: pointer;
}

/* ---- Navigation ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background: transparent;
  border-bottom: none;
  box-shadow: none;
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 var(--sp-lg);
  max-width: 1200px;
  margin: 0 auto;
}

/* Offset non-hero pages so content isn't hidden under fixed navbar */
#main-content { padding-top: 68px; }
body.page-home #main-content { padding-top: 0; }

.navbar-logo img { height: 44px; width: auto; }
.navbar-logo span {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: .02em;
}
.navbar-logo-sub {
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.65);
  font-weight: 700;
  line-height: 1;
  transition: color var(--transition-base);
}
.navbar-logo-main {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  transition: color var(--transition-base);
}
.navbar.scrolled .navbar-logo-sub { color: rgba(0,0,0,.45); }
.navbar.scrolled .navbar-logo-main { color: var(--dark); }

/* Hamburger scrolled overrides */
.navbar.scrolled .navbar-toggle { background: rgba(0,0,0,0.07); border-color: rgba(0,0,0,0.14); }
.navbar.scrolled .navbar-toggle span { background-color: var(--dark); }

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.navbar-nav a {
  font-size: .875rem;
  font-weight: 700;
  color: var(--white);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  letter-spacing: .02em;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}
.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--white);
  background-color: rgba(255, 255, 255, 0.15);
}
.navbar.scrolled .navbar-nav a { color: var(--dark); }
.navbar.scrolled .navbar-nav a:hover,
.navbar.scrolled .navbar-nav a.active {
  color: var(--dark);
  background-color: rgba(0, 0, 0, 0.07);
}

.navbar-cta { margin-left: var(--sp-xs); }
.navbar-cta.btn-dark {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.35);
  color: var(--white);
}
.navbar-cta.btn-dark:hover {
  background: rgba(255,255,255,0.28);
  border-color: rgba(255,255,255,0.6);
  color: var(--white);
}
.navbar.scrolled .navbar-cta.btn-dark {
  background: var(--dark);
  border-color: var(--dark);
  color: var(--white);
}
.navbar.scrolled .navbar-cta.btn-dark:hover {
  background: var(--charcoal);
  border-color: var(--charcoal);
}

/* Language dropdown */
.lang-dropdown {
  position: relative;
  margin-left: var(--sp-xs);
}
.lang-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .78rem;
  font-weight: 700;
  padding: 6px 11px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.30);
  border-radius: var(--radius-full);
  color: var(--white);
  cursor: pointer;
  font-family: var(--font-base);
  white-space: nowrap;
  letter-spacing: .04em;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.lang-dropdown-trigger:hover { background: rgba(255, 255, 255, 0.25); }
.navbar.scrolled .lang-dropdown-trigger {
  background: rgba(0, 0, 0, 0.07);
  border-color: rgba(0, 0, 0, 0.14);
  color: var(--dark);
}
.navbar.scrolled .lang-dropdown-trigger:hover { background: rgba(0, 0, 0, 0.13); }
.lang-dropdown-trigger svg { transition: transform var(--transition-fast); flex-shrink: 0; }
.lang-dropdown-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }

.lang-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0,0,0,0.14), 0 2px 6px rgba(0,0,0,0.07);
  border: 1px solid var(--border-color);
  min-width: 152px;
  overflow: hidden;
  z-index: var(--z-dropdown);
  animation: fadeDropdown .14s ease;
}
@keyframes fadeDropdown {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.lang-dropdown-menu.open { display: block; }
.lang-dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--charcoal);
  border-radius: 0;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.lang-dropdown-menu a:hover { background: var(--light-gray); color: var(--dark); }
.lang-dropdown-menu a.active {
  color: var(--gold-dark);
  background: rgba(212, 175, 55, 0.10);
  font-weight: 700;
}

/* Hamburger */
.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.28);
  cursor: pointer;
  border-radius: 0;
}
.navbar-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--white);
  border-radius: 0;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}
.navbar-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar-toggle.open span:nth-child(2) { opacity: 0; }
.navbar-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.navbar-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--sp-sm) var(--sp-md) var(--sp-md);
  border-top: 1px solid rgba(255,255,255,0.15);
  background: rgba(10, 24, 16, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
}
.navbar.scrolled .navbar-mobile {
  border-top-color: var(--border-color);
  background: rgba(255,255,255,0.97);
}
.navbar-mobile.open { display: flex; }
.navbar-mobile a {
  padding: 11px 16px;
  font-weight: 700;
  color: var(--white);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.navbar.scrolled .navbar-mobile a { color: var(--dark); }
.navbar-mobile a:hover { background: rgba(255,255,255,0.10); }
.navbar.scrolled .navbar-mobile a:hover { background: rgba(0,0,0,0.06); }

@media (max-width: 1024px) {
  .navbar-inner {
    max-width: 100%;
    height: 64px;
    padding: 0 var(--sp-md);
  }
  .navbar-nav,
  .lang-dropdown,
  .navbar-cta { display: none; }
  .navbar-toggle { display: flex; }
}

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
}
.badge-emerald { background: var(--emerald-muted); color: var(--emerald-dark); }
.badge-gold    { background: var(--gold-muted);    color: var(--gold-dark); }
.badge-gray    { background: var(--light-gray);    color: var(--mid-gray); }

/* ---- Divider ---- */
.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--sp-lg) 0;
}
.divider-gold { border-color: var(--gold-primary); }

/* ---- Section heading ---- */
.section-heading {
  text-align: center;
  margin-bottom: var(--sp-xl);
}
.section-heading .eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold-primary);
  margin-bottom: var(--sp-xs);
}
.section-heading h2 { margin-bottom: var(--sp-sm); }
.section-heading p  { color: var(--mid-gray); max-width: 600px; margin: 0 auto; }

/* ---- Alert ---- */
.alert {
  padding: var(--sp-sm) var(--sp-md);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  font-size: .9rem;
  margin-bottom: var(--sp-md);
}
.alert-success { background: #f0fdf4; border-color: var(--success); color: #166534; }
.alert-error   { background: var(--error-muted); border-color: var(--error); color: #991b1b; }
.alert-warning { background: #fffbeb; border-color: var(--warning); color: #92400e; }
.alert-info    { background: #eff6ff; border-color: #3b82f6; color: #1e40af; }