/*
  Original ink atmosphere enhancement layer.
  This file only adds decorative motion and hover polish. It does not own layout or business behavior.
*/

:root {
  --ink-enhance-black: rgba(2, 2, 2, 0.86);
  --ink-enhance-soft: rgba(8, 8, 8, 0.16);
  --ink-enhance-mist: rgba(255, 255, 255, 0.58);
  --ink-enhance-red: #9f1f18;
}

.ink-enhance-root,
.ink-enhance-hero,
.ink-trail-canvas,
.ink-dialog-veil {
  pointer-events: none;
}

.ink-enhance-root {
  position: fixed;
  inset: 0;
  z-index: 6;
  overflow: hidden;
  mix-blend-mode: multiply;
}

.ink-enhance-hero {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: hidden;
}

.ink-enhance-hero::before,
.ink-enhance-hero::after,
.ink-enhance-fog,
.ink-enhance-paper {
  content: "";
  position: absolute;
  inset: -14%;
}

.ink-enhance-hero::before {
  opacity: 0.18;
  filter: blur(18px);
  background:
    radial-gradient(ellipse at 14% 42%, rgba(255, 255, 255, 0.7), transparent 42%),
    radial-gradient(ellipse at 88% 58%, rgba(0, 0, 0, 0.14), transparent 38%),
    linear-gradient(115deg, transparent 0 42%, rgba(0, 0, 0, 0.16) 49%, transparent 58%);
  animation: inkEnhanceWash 22s ease-in-out infinite;
}

.ink-enhance-hero::after {
  opacity: 0.16;
  mix-blend-mode: multiply;
  background:
    linear-gradient(103deg, transparent 0 21%, rgba(0, 0, 0, 0.26) 22%, transparent 28%),
    linear-gradient(97deg, transparent 0 57%, rgba(0, 0, 0, 0.16) 59%, transparent 64%);
  transform: rotate(-4deg);
  animation: inkEnhanceDryBrush 18s ease-in-out infinite alternate;
}

.ink-enhance-fog {
  opacity: 0.24;
  filter: blur(20px);
  background:
    radial-gradient(ellipse at 18% 76%, var(--ink-enhance-mist), transparent 46%),
    radial-gradient(ellipse at 72% 48%, rgba(255, 255, 255, 0.38), transparent 44%),
    linear-gradient(93deg, transparent 0%, rgba(255, 255, 255, 0.7) 45%, transparent 88%);
  transform: translate3d(-4%, 2%, 0);
  animation: inkEnhanceFog 28s linear infinite alternate;
}

.ink-enhance-paper {
  opacity: 0.055;
  mix-blend-mode: multiply;
  background-image:
    radial-gradient(circle at 24% 32%, rgba(0, 0, 0, 0.02), transparent 18%),
    radial-gradient(circle at 72% 68%, rgba(255, 255, 255, 0.2), transparent 20%),
    repeating-linear-gradient(8deg, rgba(0, 0, 0, 0.012) 0 1px, transparent 1px 14px);
  transform: translate3d(0, 0, 0);
  animation: inkEnhancePaper 16s steps(6, end) infinite;
}

.ink-enhance-root span {
  position: absolute;
  left: calc(var(--x) * 1%);
  top: calc(var(--y) * 1%);
  width: var(--s);
  height: var(--s);
  border-radius: 999px;
  opacity: 0;
  background: rgba(0, 0, 0, var(--a));
  box-shadow: 0 0 calc(var(--s) * 2) rgba(255, 255, 255, 0.28);
  animation: inkEnhanceDust var(--d) linear infinite;
  animation-delay: var(--delay);
}

.ink-enhance-root span:nth-child(5n) {
  background: rgba(255, 255, 255, 0.5);
  mix-blend-mode: screen;
}

.ink-enhance-root span:nth-child(11n) {
  width: calc(var(--s) * 3);
  height: 1px;
  border-radius: 0;
  background: rgba(159, 31, 24, 0.28);
  transform: rotate(-16deg);
}

.ink-trail-canvas {
  position: fixed;
  inset: 0;
  z-index: 12;
  width: 100%;
  height: 100%;
  opacity: 0.78;
}

.hero-bg {
  transform-origin: 60% 50%;
  animation: inkEnhanceHeroBreath 20s ease-in-out infinite;
  will-change: transform;
}

.hero-content h1,
.hero-copy,
.hero-actions,
.hero-ribbon {
  animation: inkTextBloom 0.92s cubic-bezier(0.19, 1, 0.22, 1) both;
}

.hero-content h1 {
  animation-duration: 0.82s;
}

.hero-copy {
  animation-delay: 0.2s;
}

.hero-actions {
  animation-delay: 0.32s;
}

.hero-ribbon {
  animation-delay: 0.42s;
}

.calligraphy-wall span {
  animation:
    inkCalligraphyWake 1.12s cubic-bezier(0.19, 1, 0.22, 1) both,
    calligraphyFloat 8s ease-in-out infinite;
}

.calligraphy-wall span:nth-child(2) {
  animation-delay: 0.08s, -1.2s;
}

.calligraphy-wall span:nth-child(3) {
  animation-delay: 0.16s, -2.4s;
}

.calligraphy-wall span:nth-child(4) {
  animation-delay: 0.24s, -3.5s;
}

.btn,
.profile-btn,
.forum-actions button,
.reaction-row button,
.comment-form button,
.wall-form button,
.profile-like,
.wall-like,
.filter-btn,
.chapter-item {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn::after,
.profile-btn::after,
.forum-actions button::after,
.reaction-row button::after,
.comment-form button::after,
.wall-form button::after,
.profile-like::after,
.wall-like::after,
.filter-btn::after,
.chapter-item::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 5px;
  z-index: 0;
  pointer-events: none;
  height: 3px;
  opacity: 0;
  border-radius: 999px;
  background:
    linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.52), transparent),
    linear-gradient(90deg, transparent 0 18%, rgba(255, 255, 255, 0.55) 19% 23%, transparent 24% 48%, rgba(255, 255, 255, 0.45) 49% 54%, transparent 55%);
  filter: blur(0.15px);
  transform: scaleX(0.2);
  transform-origin: left;
  transition: opacity 0.24s ease, transform 0.28s ease;
}

.btn:hover::after,
.profile-btn:hover::after,
.forum-actions button:hover::after,
.reaction-row button:hover::after,
.comment-form button:hover::after,
.wall-form button:hover::after,
.profile-like:hover::after,
.wall-like:hover::after,
.filter-btn:hover::after,
.chapter-item:hover::after {
  opacity: 0.82;
  transform: scaleX(1);
}

.btn-primary:hover {
  border-color: rgba(159, 31, 24, 0.8);
  box-shadow:
    0 20px 46px rgba(0, 0, 0, 0.18),
    inset 0 -2px 0 rgba(159, 31, 24, 0.65);
}

.btn-primary:hover::after {
  background:
    linear-gradient(90deg, transparent, rgba(159, 31, 24, 0.8), transparent),
    linear-gradient(90deg, transparent 0 22%, rgba(255, 255, 255, 0.48) 23% 29%, transparent 30%);
}

.ink-panel,
.member-card,
.forum-card,
.activity-item,
.chapter-paper,
.profile-section,
.notice-panel,
.pulse-panel {
  transition:
    translate 0.24s ease,
    border-color 0.24s ease,
    box-shadow 0.24s ease,
    background-color 0.24s ease;
}

.ink-panel:hover,
.forum-card:hover,
.activity-item:hover,
.chapter-paper:hover,
.profile-section:hover,
.notice-panel:hover,
.pulse-panel:hover {
  translate: 0 -3px;
  border-color: rgba(0, 0, 0, 0.36);
  box-shadow:
    0 30px 82px rgba(0, 0, 0, 0.16),
    inset 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.member-card:hover {
  translate: 0 -4px;
  border-color: rgba(0, 0, 0, 0.38);
}

.profile-modal[open] {
  animation: inkDialogIn 0.24s cubic-bezier(0.2, 0.9, 0.2, 1) both;
}

.profile-modal[open]::backdrop {
  animation: inkBackdropIn 0.24s ease both;
}

.profile-modal.ink-dialog-closing {
  animation: inkDialogOut 0.18s ease both;
}

.profile-modal.ink-dialog-closing::backdrop {
  animation: inkBackdropOut 0.18s ease both;
}

.profile-modal::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  box-shadow:
    inset 0 0 0 1px rgba(0, 0, 0, 0.24),
    inset 0 0 36px rgba(0, 0, 0, 0.06);
  background:
    linear-gradient(115deg, transparent 0 46%, rgba(0, 0, 0, 0.08) 47%, transparent 55%),
    radial-gradient(ellipse at 8% 14%, rgba(0, 0, 0, 0.08), transparent 32%);
  opacity: 0.5;
}

@keyframes inkEnhanceHeroBreath {
  0%, 100% {
    transform: scale(1.035) translate(calc(var(--parallax-x) * -9px), calc(var(--parallax-y) * -7px));
  }
  50% {
    transform: scale(1.055) translate(calc(var(--parallax-x) * -9px), calc(var(--parallax-y) * -7px));
  }
}

@keyframes inkEnhanceFog {
  from {
    transform: translate3d(-5%, 2%, 0) rotate(-1deg);
  }
  to {
    transform: translate3d(5%, -2%, 0) rotate(1deg);
  }
}

@keyframes inkEnhanceWash {
  0%, 100% {
    opacity: 0.13;
    transform: translate3d(-1%, 1%, 0) scale(0.99);
  }
  50% {
    opacity: 0.23;
    transform: translate3d(1.5%, -1%, 0) scale(1.02);
  }
}

@keyframes inkEnhanceDryBrush {
  from {
    transform: translate3d(-2%, 1%, 0) rotate(-5deg);
  }
  to {
    transform: translate3d(2%, -1%, 0) rotate(-3deg);
  }
}

@keyframes inkEnhancePaper {
  0%, 100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(-8px, 6px, 0);
  }
}

@keyframes inkEnhanceDust {
  0% {
    opacity: 0;
    transform: translate3d(0, 18px, 0) scale(0.8) rotate(0deg);
  }
  22% {
    opacity: 0.62;
  }
  78% {
    opacity: 0.32;
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--dx), -78px, 0) scale(1.08) rotate(18deg);
  }
}

@keyframes inkTextBloom {
  from {
    opacity: 0;
    filter: blur(8px);
    transform: translate3d(-10px, 16px, 0);
    clip-path: inset(0 8% 26% 0);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: translate3d(0, 0, 0);
    clip-path: inset(0 0 0 0);
  }
}

@keyframes inkCalligraphyWake {
  from {
    opacity: 0;
    filter: blur(10px);
    transform: translate3d(-12px, 20px, 0) rotate(var(--r));
  }
  to {
    opacity: 1;
    filter: blur(0.2px);
    transform: translate3d(0, 0, 0) rotate(var(--r));
  }
}

@keyframes inkDialogIn {
  from {
    opacity: 0;
    filter: blur(10px);
    transform: scale(0.972) translateY(10px);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: scale(1) translateY(0);
  }
}

@keyframes inkDialogOut {
  from {
    opacity: 1;
    filter: blur(0);
    transform: scale(1) translateY(0);
  }
  to {
    opacity: 0;
    filter: blur(8px);
    transform: scale(0.978) translateY(8px);
  }
}

@keyframes inkBackdropIn {
  from {
    opacity: 0;
    backdrop-filter: blur(0);
  }
  to {
    opacity: 1;
    backdrop-filter: blur(8px);
  }
}

@keyframes inkBackdropOut {
  from {
    opacity: 1;
    backdrop-filter: blur(8px);
  }
  to {
    opacity: 0;
    backdrop-filter: blur(0);
  }
}

@media (max-width: 760px), (pointer: coarse) {
  .ink-trail-canvas {
    display: none;
  }

  .ink-enhance-root {
    opacity: 0.45;
  }

  .ink-enhance-root span:nth-child(n + 10) {
    display: none;
  }

  .hero-bg {
    animation-duration: 28s;
  }

  .ink-enhance-hero::before,
  .ink-enhance-hero::after {
    opacity: 0.1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ink-trail-canvas,
  .ink-enhance-root {
    display: none;
  }

  .hero-bg,
  .ink-enhance-hero,
  .ink-enhance-hero::before,
  .ink-enhance-hero::after,
  .ink-enhance-fog,
  .ink-enhance-paper,
  .hero-content h1,
  .hero-copy,
  .hero-actions,
  .hero-ribbon,
  .calligraphy-wall span,
  .profile-modal[open],
  .profile-modal[open]::backdrop {
    animation: none !important;
    filter: none !important;
  }
}