/* ═══════════════════════════════════════════════════════════════════════════
 * ROMANTIC LETTER STYLING - SCOPED TO .rm-letter-card ONLY
 * ═══════════════════════════════════════════════════════════════════════════
 * This file contains ONLY styles that target .rm-letter-card and its children.
 * No global styles, no modifications to other components.
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════════════════════════
 * PAPER / BACKGROUND - VINTAGE TEXTURE
 * ═══════════════════════════════════════════════════════════════════════════ */

.rm-letter-card {
  /* Base paper appearance */
  position: relative;
  background: 
    /* Subtle grain overlay */
    url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.035'/%3E%3C/svg%3E"),
    /* Warm yellowed paper gradient */
    linear-gradient(
      168deg,
      #fdf8f0 0%,
      #faf3e8 15%,
      #f7efe0 35%,
      #f5ead8 55%,
      #f2e6d2 75%,
      #f0e2cc 100%
    );
  
  /* Paper fiber texture via box-shadow insets */
  box-shadow: 
    /* Drop shadow - paper on desk effect */
    0 25px 60px rgba(60, 40, 30, 0.25),
    0 10px 25px rgba(60, 40, 30, 0.15),
    0 4px 8px rgba(60, 40, 30, 0.1),
    /* Inner vignette effect */
    inset 0 0 80px rgba(180, 150, 120, 0.12),
    inset 0 0 40px rgba(160, 130, 100, 0.08),
    /* Subtle edge darkening */
    inset 2px 2px 8px rgba(120, 90, 60, 0.04),
    inset -2px -2px 8px rgba(120, 90, 60, 0.04);
  
  /* Soften edges like real paper */
  border: 1px solid rgba(200, 170, 140, 0.35);
  border-radius: 4px;
  
  /* Padding for content breathing room */
  padding: var(--rm-space-8);
  max-width: 100%;
  
  /* Enable pseudo-elements for effects but contain content */
  overflow: hidden;
  isolation: isolate;
}

/* Vignette overlay using ::before */
.rm-letter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
  
  /* Soft vignette - darker at edges */
  background: radial-gradient(
    ellipse 85% 80% at 50% 45%,
    transparent 0%,
    transparent 55%,
    rgba(180, 150, 110, 0.06) 70%,
    rgba(160, 130, 90, 0.12) 85%,
    rgba(140, 110, 70, 0.18) 100%
  );
  
  /* Breathing vignette animation */
  animation: rm-letter-vignette-breathe 8s ease-in-out infinite;
}

/* Glowing heart watermark using ::after */
.rm-letter-card::after {
  content: '💕';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 180px;
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
  filter: blur(8px);
  animation: rm-letter-watermark-pulse 12s ease-in-out infinite;
}

/* Breathing vignette keyframes */
@keyframes rm-letter-vignette-breathe {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.85;
  }
}

/* Heart watermark pulse */
@keyframes rm-letter-watermark-pulse {
  0%, 100% {
    opacity: 0.04;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 0.06;
    transform: translate(-50%, -50%) scale(1.02);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
 * INK / TYPOGRAPHY - HANDWRITTEN FEEL
 * ═══════════════════════════════════════════════════════════════════════════ */

/* Default text styling - elegant serif */
.rm-letter-card,
.rm-letter-card * {
  position: relative;
  z-index: 2;
}

.rm-letter-card__body {
  font-family: 'Crimson Text', 'Cormorant Garamond', Georgia, serif;
  font-size: 1.15rem;
  line-height: 2;
  color: #3b2b2b;
  letter-spacing: 0.01em;
  word-wrap: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

.rm-letter-card__body p {
  margin-bottom: 1.5em;
  text-indent: 0;
  color: #3b2b2b;
  transition: color 0.3s ease;
}

/* Subtle ink color variation */
.rm-letter-card__body p:nth-child(odd) {
  color: #352626;
}

.rm-letter-card__body p:nth-child(even) {
  color: #3f2e2e;
}

/* Header styling */
.rm-letter-card__header {
  text-align: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(180, 140, 100, 0.25);
}

.rm-letter-card__title {
  font-family: 'Dancing Script', 'Caveat', cursive;
  font-size: 1.6rem;
  font-weight: 500;
  color: #4a3535;
  letter-spacing: 0.02em;
}

/* Emotional closing paragraph - script font */
.rm-letter-card__closing {
  font-family: 'Caveat', 'Dancing Script', cursive !important;
  font-size: 1.4rem !important;
  line-height: 1.8 !important;
  color: #3d2828 !important;
  font-weight: 500;
  margin-top: 0.5rem;
  position: relative;
}

/* Subtle shimmer on closing line */
.rm-letter-card__closing::before {
  content: '';
  position: absolute;
  top: 0;
  left: -10%;
  right: -10%;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 200, 180, 0.15) 25%,
    rgba(255, 220, 200, 0.2) 50%,
    rgba(255, 200, 180, 0.15) 75%,
    transparent 100%
  );
  opacity: 0;
  animation: rm-letter-shimmer 6s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

/* Signature styling */
.rm-letter-card__signature {
  font-family: 'Dancing Script', cursive !important;
  font-size: 1.5rem !important;
  font-weight: 600 !important;
  color: #3a2525 !important;
  text-align: center;
  display: block;
  margin-top: 1rem;
  position: relative;
}

/* Hand-drawn underline for signature */
.rm-letter-card__signature::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(180, 100, 100, 0.4) 20%,
    rgba(180, 100, 100, 0.6) 50%,
    rgba(180, 100, 100, 0.4) 80%,
    transparent 100%
  );
  border-radius: 50%;
}

/* Footer styling */
.rm-letter-card__footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(180, 140, 100, 0.2);
  text-align: center;
}

.rm-letter-card__from {
  font-family: 'Crimson Text', serif;
  font-size: 0.95rem;
  font-style: italic;
  color: #5a4545;
  display: block;
  margin-bottom: 0.75rem;
}

.rm-letter-card__sign {
  font-family: 'Dancing Script', cursive;
  font-size: 1.3rem;
  font-weight: 600;
  color: #4a3030;
  display: block;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * EMOTIONAL EMPHASIS EFFECTS
 * ═══════════════════════════════════════════════════════════════════════════ */

/* Shimmer animation for romantic sentences */
@keyframes rm-letter-shimmer {
  0%, 100% {
    opacity: 0;
    transform: translateX(-5%);
  }
  40%, 60% {
    opacity: 1;
    transform: translateX(5%);
  }
}

/* Ink bleed effect on emphasized text (using text-shadow) */
.rm-letter-card__body p:nth-child(3),
.rm-letter-card__body p:nth-child(4) {
  text-shadow: 
    0 0 1px rgba(50, 30, 30, 0.1),
    0.5px 0.5px 0 rgba(60, 40, 40, 0.03);
}

/* Special emphasis for the most heartfelt paragraph */
.rm-letter-card__body p:nth-child(4) {
  position: relative;
  padding: 0.75rem 1rem;
  margin-left: -1rem;
  margin-right: -1rem;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 230, 210, 0.25) 10%,
    rgba(255, 230, 210, 0.3) 50%,
    rgba(255, 230, 210, 0.25) 90%,
    transparent 100%
  );
  border-radius: 4px;
}

/* Hand-drawn swirl decoration for select lines */
.rm-letter-card__body p:nth-child(4)::before {
  content: '~';
  position: absolute;
  left: -0.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'Dancing Script', cursive;
  font-size: 1.5rem;
  color: rgba(180, 120, 120, 0.4);
  pointer-events: none;
}

.rm-letter-card__body p:nth-child(4)::after {
  content: '~';
  position: absolute;
  right: -0.5rem;
  top: 50%;
  transform: translateY(-50%) scaleX(-1);
  font-family: 'Dancing Script', cursive;
  font-size: 1.5rem;
  color: rgba(180, 120, 120, 0.4);
  pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════════════════════
 * MAGICAL EFFECTS - PINK DUST PARTICLES
 * ═══════════════════════════════════════════════════════════════════════════ */

/* Pink dust particles container */
.rm-letter-card .rm-letter-dust {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 3;
  overflow: hidden;
  border-radius: inherit;
}

/* Individual dust particles - created via JS but styled here */
.rm-letter-card .rm-letter-dust-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: radial-gradient(circle, rgba(255, 180, 200, 0.8) 0%, rgba(255, 150, 180, 0) 70%);
  border-radius: 50%;
  opacity: 0;
  animation: rm-letter-dust-drift 15s ease-in-out infinite;
}

/* Dust particle variations */
.rm-letter-card .rm-letter-dust-particle:nth-child(1) {
  left: 10%;
  animation-delay: 0s;
  animation-duration: 18s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(2) {
  left: 25%;
  animation-delay: 3s;
  animation-duration: 22s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(3) {
  left: 40%;
  animation-delay: 6s;
  animation-duration: 16s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(4) {
  left: 55%;
  animation-delay: 2s;
  animation-duration: 20s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(5) {
  left: 70%;
  animation-delay: 5s;
  animation-duration: 19s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(6) {
  left: 85%;
  animation-delay: 8s;
  animation-duration: 17s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(7) {
  left: 15%;
  animation-delay: 10s;
  animation-duration: 21s;
}

.rm-letter-card .rm-letter-dust-particle:nth-child(8) {
  left: 60%;
  animation-delay: 4s;
  animation-duration: 23s;
}

/* Dust drift animation */
@keyframes rm-letter-dust-drift {
  0% {
    opacity: 0;
    transform: translateY(100%) translateX(0) scale(0.5);
  }
  10% {
    opacity: 0.6;
  }
  50% {
    opacity: 0.4;
    transform: translateY(40%) translateX(20px) scale(1);
  }
  90% {
    opacity: 0.2;
  }
  100% {
    opacity: 0;
    transform: translateY(-20%) translateX(-10px) scale(0.3);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
 * RESPONSIVE ADJUSTMENTS - SCOPED TO LETTER ONLY
 * ═══════════════════════════════════════════════════════════════════════════ */

@media (min-width: 768px) {
  .rm-letter-card__body {
    font-size: 1.25rem;
    line-height: 2.1;
  }
  
  .rm-letter-card__title {
    font-size: 1.8rem;
  }
  
  .rm-letter-card__closing {
    font-size: 1.5rem !important;
  }
  
  .rm-letter-card__signature {
    font-size: 1.7rem !important;
  }
  
  .rm-letter-card::after {
    font-size: 220px;
  }
}

@media (max-width: 480px) {
  .rm-letter-card {
    /* Ensure no horizontal overflow on small screens */
    max-width: 100%;
    box-sizing: border-box;
    padding: var(--rm-space-5, 20px) var(--rm-space-4, 16px);
    /* Simpler shadow on mobile for performance */
    box-shadow: 
      0 15px 40px rgba(60, 40, 30, 0.2),
      0 6px 15px rgba(60, 40, 30, 0.12),
      inset 0 0 50px rgba(180, 150, 120, 0.1);
  }
  
  .rm-letter-card__body {
    font-size: 1.05rem;
    line-height: 1.9;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }
  
  .rm-letter-card__title {
    font-size: 1.35rem;
  }
  
  .rm-letter-card__closing {
    font-size: 1.25rem !important;
  }
  
  .rm-letter-card::after {
    font-size: 140px;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
 * REDUCED MOTION - SCOPED TO LETTER ONLY
 * ═══════════════════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .rm-letter-card::before {
    animation: none;
  }
  
  .rm-letter-card::after {
    animation: none;
  }
  
  .rm-letter-card__closing::before {
    animation: none;
    opacity: 0.5;
  }
  
  .rm-letter-card .rm-letter-dust-particle {
    animation: none;
    display: none;
  }
}