/* ==========================================================================
   MTP.VN - CÁO BẠCH THÔNG TIN - LETTER STYLE
   ========================================================================== */

/* ---------- VARIABLES ---------- */
:root {
  --color-ink: #1A2332;
  --color-ink-light: #3D4F63;
  --color-ink-muted: #6B7A8D;
  --color-accent: #8B6914;
  --color-accent-light: #C8A35A;
  --color-paper: #FFFDF7;
  --color-paper-edge: #F5F0E6;
  --color-border: #D4C9B0;
  --color-border-light: #E8E0D0;
  --color-white: #FFFFFF;
  --color-bg: #E8E0D0;
  --color-pen-blue: #0b3d91;
  --font-body: 'Be Vietnam Pro', 'Segoe UI', sans-serif;
  --font-serif: 'Cormorant Garamond', 'Times New Roman', Georgia, serif;
  --font-quote: 'Playfair Display', serif;
  --font-signature: 'Great Vibes', cursive;
}

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 100%; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  font-size: 0.938rem;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

a { color: var(--color-accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-ink); }
strong { font-weight: 600; }
em { font-style: italic; }

/* ---------- LETTER PAGE ---------- */
.letter-page {
  background: var(--color-paper);
  max-width: 860px;
  width: 100%;
  padding: 3rem 3.5rem;
  border-radius: 3px;
  box-shadow:
    0 1px 3px rgba(0,0,0,0.06),
    0 6px 16px rgba(0,0,0,0.06),
    0 24px 60px rgba(0,0,0,0.08);
  position: relative;
}

/* Subtle paper texture left edge */
.letter-page::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent-light), var(--color-accent), var(--color-accent-light));
  border-radius: 3px 0 0 3px;
  opacity: 0.5;
}

/* ---------- HEADER ---------- */
.letter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.letter-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.meta-label {
  font-family: var(--font-quote);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.3px;
}

.meta-date {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

/* ---------- DIVIDER ---------- */
.letter-divider {
  height: 1px;
  background: linear-gradient(90deg, var(--color-border), var(--color-border-light), var(--color-border));
  margin: 1.25rem 0;
}

/* ---------- TITLE ---------- */
.letter-title {
  font-family: var(--font-quote);
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-ink);
  text-align: center;
  margin-bottom: 1rem;
  line-height: 1.3;
}

/* ---------- GREETING ---------- */
.letter-greeting {
  font-size: 0.95rem;
  color: var(--color-ink-light);
  margin-bottom: 0.75rem;
}

/* ---------- BODY ---------- */
.letter-body p {
  margin-bottom: 0.7rem;
  text-align: justify;
  hyphens: auto;
  color: var(--color-ink-light);
  font-size: 0.875rem;
  line-height: 1.7;
}

.letter-body p:last-child {
  margin-bottom: 0;
}

/* ---------- QUOTE ---------- */
.letter-quote {
  margin: 1.25rem 0;
  padding: 0.85rem 1.5rem;
  border-left: 3px solid var(--color-accent-light);
  background: linear-gradient(90deg, rgba(200,163,90,0.06), transparent);
  font-family: var(--font-quote);
  font-size: 1.15rem;
  font-weight: 500;
  font-style: italic;
  color: var(--color-ink);
  line-height: 1.6;
  border-radius: 0 4px 4px 0;
}

/* ---------- LINK INLINE ---------- */
.link-inline {
  color: var(--color-accent);
  font-weight: 500;
  border-bottom: 1px solid rgba(200,163,90,0.4);
  transition: all 0.2s;
}
.link-inline:hover {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

/* ---------- SIGNATURE ---------- */
.letter-signature {
  margin-top: 1.5rem;
  text-align: right;
  padding-right: 1rem;
}

.sig-closing {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.sig-ink {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  margin-bottom: 0.4rem;
}

.sig-handwrite {
  font-family: var(--font-signature);
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--color-pen-blue);
  line-height: 0.8;
  padding-right: 0.5rem;
  opacity: 0;
  transform: translateY(8px) rotate(-3deg);
  animation: sigFadeIn 1s 0.5s ease forwards;
}

.sig-line {
  width: 180px;
  height: 1.5px;
  background: linear-gradient(90deg, transparent, var(--color-accent-light), var(--color-accent), var(--color-accent-light), transparent);
  margin-top: 0.2rem;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: right;
  animation: sigDraw 1.2s 1s cubic-bezier(0.4,0,0.2,1) forwards;
}

@keyframes sigFadeIn {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes sigDraw {
  to { opacity: 1; transform: scaleX(1); }
}

.sig-fullname {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 0.1rem;
  line-height: 1.2;
}

.sig-title {
  font-size: 0.85rem;
  color: var(--color-ink-light);
  font-weight: 500;
  margin-bottom: 0.1rem;
  font-style: italic;
}

.sig-dept {
  font-size: 0.72rem;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.15rem;
}

.sig-org {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;

}

/* ---------- FOOTNOTE ---------- */
.letter-footnote {
  font-size: 0.78rem;
  color: var(--color-ink-muted);
  text-align: center;
  line-height: 1.5;
}

/* ---------- DISCLAIMER ---------- */
.letter-disclaimer {
  margin-top: 1rem;
  padding: 0.6rem 0.85rem;
  border-left: 2px solid var(--color-border);
  background: rgba(0,0,0,0.015);
  border-radius: 0 3px 3px 0;
}

.letter-disclaimer p {
  font-size: 0.7rem;
  color: var(--color-ink-muted);
  line-height: 1.55;
  margin-bottom: 0;
  opacity: 0.8;
}

/* ---------- FOOTER ---------- */
.page-footer {
  max-width: 860px;
  width: 100%;
  text-align: center;
  padding: 1rem 0 0.5rem;
  margin-top: 0.5rem;
}

.page-footer p {
  font-size: 0.7rem;
  color: var(--color-ink-muted);
  opacity: 0.6;
  margin-bottom: 0.2rem;
  line-height: 1.4;
}

.page-footer a {
  color: var(--color-accent);
}
.page-footer a:hover {
  color: var(--color-ink);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 768px) {
  body { padding: 1rem 0.5rem; }
  .letter-page { padding: 2rem 1.5rem; }
  .letter-header { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .letter-meta { text-align: left; }
  .logo-img { height: 36px; }
  .letter-title { font-size: 1.25rem; }
  .letter-body p { font-size: 0.82rem; text-align: left; }
  .letter-quote { font-size: 0.95rem; }
  .letter-signature { padding-right: 0; }
  .sig-name { font-size: 1.15rem; }
}

@media (max-width: 480px) {
  .letter-page { padding: 1.5rem 1.15rem; }
  .letter-title { font-size: 1.1rem; }
  .letter-body p { font-size: 0.8rem; line-height: 1.65; }
}

/* ---------- PRINT ---------- */
@media print {
  body { background: white; padding: 0; }
  .letter-page { box-shadow: none; border: 1px solid #ddd; }
  .page-footer { display: none; }
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  .sig-line { opacity: 1; transform: scaleX(1); animation: none; }
}