/* Nút */
.btn {
  --btn-bg: var(--accent);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 0.97rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.25s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
  text-align: center;
}

.btn svg { width: 18px; height: 18px; flex: none; }
.btn:hover { color: var(--btn-fg); transform: translateY(-2px); box-shadow: 0 14px 34px rgba(255, 77, 33, 0.32); }
.btn:active { transform: translateY(0); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  box-shadow: none;
  border-color: var(--text);
}

.btn--light { --btn-bg: #fff; --btn-fg: #0b0b0d; }
.btn--light:hover { box-shadow: 0 14px 34px rgba(255, 255, 255, 0.18); }
.btn--sm { min-height: 42px; padding: 0 18px; font-size: 0.9rem; }
.btn--block { width: 100%; }

/* Nhãn nhỏ */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
}

.accent { color: var(--accent); }

.text-gradient {
  background: linear-gradient(100deg, #fff 20%, var(--accent-soft) 58%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Thẻ chung */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-md);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
  overflow: hidden;
  height: 100%;
}

.card::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 77, 33, 0.14), transparent 62%);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}

.card:hover { transform: translateY(-5px); border-color: var(--line-strong); }
.card:hover::after { opacity: 1; }

.card__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(255, 77, 33, 0.12);
  border: 1px solid rgba(255, 77, 33, 0.24);
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-size: var(--step-1); margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.97rem; }

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-sm);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text);
}

.card__link svg { width: 16px; height: 16px; transition: transform 0.25s var(--ease); }
.card__link:hover svg { transform: translateX(4px); }

/* Ảnh dự phòng khi chưa có ảnh đại diện */
.work-card__media[data-label]::after {
  content: attr(data-label);
  position: absolute;
  inset: auto 0 0 0;
  padding: 18px 22px;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 0.8rem + 1.2vw, 1.9rem);
  font-weight: 700;
  line-height: 1.15;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.45);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.45), transparent);
}

.ph-1 { background: linear-gradient(135deg, #2a1610, #ff4d21 130%); }
.ph-2 { background: linear-gradient(135deg, #141033, #7c5cff 140%); }
.ph-3 { background: linear-gradient(135deg, #0e2320, #29c7a6 150%); }
.ph-4 { background: linear-gradient(135deg, #251024, #ff4d8d 150%); }

/* Form */
.field { display: grid; gap: 8px; }

.field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 50px;
  padding: 13px 16px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.field textarea { min-height: 130px; resize: vertical; }

.field input::placeholder,
.field textarea::placeholder { color: #6d6d78; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #1f1f27;
}

.field .hint { font-size: 0.82rem; color: var(--muted); }
.field .req { color: var(--accent); }

.honeypot { position: absolute; left: -9999px; opacity: 0; }

.form-notice {
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.95rem;
  border: 1px solid;
  margin-bottom: var(--space-sm);
}

.form-notice--ok { border-color: rgba(41, 199, 166, 0.4); background: rgba(41, 199, 166, 0.1); color: #7ff0d5; }
.form-notice--err { border-color: rgba(255, 77, 33, 0.45); background: rgba(255, 77, 33, 0.1); color: #ffb09a; }

/* Hiệu ứng hiện dần khi cuộn */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--delay, 0ms);
}

html.js [data-reveal].is-visible { opacity: 1; transform: none; }