/* Skin THIỆP — như tấm thiệp in: giấy kem, chữ than đậm, điểm hồng san hô, ảnh tem thư */
.sk-body-thiep {
	--sk-page: #3b3333; --sk-bg: #fbf6f0; --sk-surface: #ffffff; --sk-alt: #f5ece3;
	--sk-ink: #3b3333; --sk-muted: #8e7f7a; --sk-accent: #d9605a; --sk-accent-2: #e7a39b;
	--sk-on-accent: #ffffff; --sk-line: rgba(59, 51, 51, .16);
	--sk-hero-bg: #fbf6f0;
	--sk-radius: 2px;
	--f-body: 'Prata', Georgia, serif; --f-head: 'Prata', Georgia, serif; --f-name: 'Charm', cursive;
	--env-a: #3b3333; --env-b: #e7746f; --env-paper: #fbf6f0; --env-ink: #3b3333;
}
/* Bìa như mặt thiệp: viền mảnh bao quanh, giấy có vân */
.sk-body-thiep .sk { background-image: repeating-linear-gradient(0deg, rgba(0, 0, 0, .012) 0 2px, transparent 2px 4px); }
.sk-body-thiep .sk-hero { margin: 18px; border: 1px solid var(--sk-ink); }
.sk-body-thiep .sk-hero::before { content: ''; position: absolute; inset: 6px; border: 1px solid var(--sk-accent-2); pointer-events: none; }
.sk-body-thiep .sk-names { color: var(--sk-ink); }
.sk-body-thiep .sk-names .sk-amp { color: var(--sk-accent); }
.sk-body-thiep .sk-title, .sk-body-thiep .sk-guestbook .event-heading h2 { color: var(--sk-ink); }
.sk-body-thiep .sk-event, .sk-body-thiep .sk-calendar, .sk-body-thiep .sk-form { border-color: var(--sk-ink); }
.sk-body-thiep .sk-btn { border-radius: 2px; }
.sk-body-thiep .sk-thanks { background: #3b3333; }