/*
  BY JS 2026-06-05
  르노코리아 로딩 컴포넌트 단독 CSS

  사용법:
  1. assets/css/loading.css를 공통 레이아웃에 연결한다.
  2. 로고 파일은 assets/img/logo.svg 경로에 둔다.
  3. 전체 화면 로딩은 .rk-loading-overlay를 사용한다.
  4. 인라인 로딩은 .rk-inline-loader를 사용한다.
  5. 버튼 로딩은 버튼에 .is-loading을 붙이고 내부에 .rk-button-loader-logo를 둔다.
*/

:root {
  color-scheme: dark;

  --rk-loading-bg: #05070a;
  --rk-loading-panel: rgba(10, 15, 22, .58);
  --rk-loading-panel-strong: rgba(13, 18, 25, .86);
  --rk-loading-line: rgba(255, 255, 255, .13);
  --rk-loading-text: #f7f8fa;
  --rk-loading-muted: #7f8a99;
  --rk-loading-yellow: #f7d100;
  --rk-loading-yellow-strong: #ffe066;
  --rk-loading-radius-lg: 28px;
  --rk-loading-radius-md: 18px;
  --rk-loading-ease: cubic-bezier(.45, 0, .2, 1);
  --rk-loading-font: "Happiness Sans", "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

* {
  box-sizing: border-box;
}

.rk-loading-demo-body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 70% 20%, rgba(247, 209, 0, .09), transparent 25%),
    radial-gradient(circle at 22% 78%, rgba(255, 255, 255, .05), transparent 26%),
    linear-gradient(135deg, #030509 0%, #101720 52%, #05070a 100%);
  color: var(--rk-loading-text);
  font-family: var(--rk-loading-font);
}

.rk-loading-demo {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0;
}

.rk-loading-demo h1 {
  margin: 0;
  font-size: 32px;
  letter-spacing: -.05em;
}

.rk-loading-demo p {
  margin: 10px 0 0;
  color: var(--rk-loading-muted);
  line-height: 1.7;
}

.rk-loading-demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.rk-loading-demo-card {
  min-height: 300px;
  padding: 22px;
  border: 1px solid var(--rk-loading-line);
  border-radius: var(--rk-loading-radius-lg);
  background:
    linear-gradient(180deg, rgba(255,255,255,.074), rgba(255,255,255,.02)),
    var(--rk-loading-panel);
  box-shadow:
    0 18px 46px rgba(0, 0, 0, .28),
    inset 0 1px 0 rgba(255, 255, 255, .1);
  backdrop-filter: blur(28px) saturate(1.34);
}

/* ==========================================================================
   1. 로고 빌드 로딩
   ========================================================================== */
.rk-logo-loader {
  position: relative;
  isolation: isolate;
  width: 172px;
  height: 172px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
}

.rk-logo-loader::before {
  content: "";
  position: absolute;
  inset: -28px;
  z-index: 0;
  border-radius: 999px;
  background:
    radial-gradient(circle, rgba(247,209,0,.19), transparent 42%),
    conic-gradient(from 0deg, transparent 0deg, rgba(247,209,0,.13) 42deg, rgba(255,255,255,.06) 58deg, transparent 104deg, transparent 360deg);
  filter: blur(8px);
  animation: rkLoaderHalo 5.2s var(--rk-loading-ease) infinite;
}

.rk-logo-loader::after {
  content: "";
  position: absolute;
  left: -28%;
  top: 50%;
  z-index: 2;
  width: 156%;
  height: 1.5px;
  background:
    linear-gradient(
      90deg,
      transparent 0%,
      rgba(247,209,0,.08) 20%,
      rgba(247,209,0,.62) 46%,
      rgba(255,255,255,.48) 52%,
      rgba(247,209,0,.18) 62%,
      transparent 100%
    );
  filter:
    drop-shadow(0 0 10px rgba(247,209,0,.48))
    drop-shadow(0 0 24px rgba(247,209,0,.16));
  opacity: 0;
  transform: translateY(-50%);
  animation: rkLogoBuildLine 5.2s var(--rk-loading-ease) infinite;
}

.rk-logo-edge {
  position: absolute;
  z-index: 4;
  width: 112px;
  height: 112px;
  background:
    conic-gradient(
      from 0deg,
      rgba(247,209,0,.1),
      rgba(255,255,255,.96),
      rgba(247,209,0,.88),
      rgba(255,224,102,.22),
      rgba(247,209,0,.1)
    );
  -webkit-mask: url("../img/logo.svg") center / contain no-repeat;
  mask: url("../img/logo.svg") center / contain no-repeat;
  filter:
    drop-shadow(0 0 8px rgba(255,255,255,.16))
    drop-shadow(0 0 22px rgba(247,209,0,.44))
    drop-shadow(0 0 56px rgba(247,209,0,.18));
  opacity: .34;
  animation: rkLogoEdgeGlow 5.2s var(--rk-loading-ease) infinite;
  pointer-events: none;
}

.rk-logo-scan {
  position: absolute;
  left: 50%;
  top: -20%;
  z-index: 5;
  width: 2px;
  height: 140%;
  border-radius: 999px;
  background:
    linear-gradient(
      180deg,
      transparent,
      rgba(247,209,0,.18),
      rgba(255,255,255,.72),
      rgba(247,209,0,.2),
      transparent
    );
  filter:
    drop-shadow(0 0 8px rgba(247,209,0,.46))
    drop-shadow(0 0 18px rgba(247,209,0,.16));
  opacity: 0;
  animation: rkLogoVerticalBuild 5.2s var(--rk-loading-ease) infinite;
}

.rk-logo-scan--bottom {
  top: auto;
  bottom: -20%;
  animation-delay: .18s;
}

.rk-logo-loader img {
  position: relative;
  z-index: 3;
  width: 100px;
  height: 100px;
  object-fit: contain;
  filter:
    brightness(0) invert(1)
    drop-shadow(0 0 7px rgba(255,255,255,.12))
    drop-shadow(0 0 18px rgba(247,209,0,.34))
    drop-shadow(0 0 44px rgba(247,209,0,.12));
  animation: rkLogoMaterialize 5.2s var(--rk-loading-ease) infinite;
}

/* ==========================================================================
   2. 전체 화면 로딩
   ========================================================================== */
.rk-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 44%, rgba(247,209,0,.12), transparent 32%),
    rgba(3,5,8,.72);
  backdrop-filter: blur(30px) saturate(1.28);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 320ms cubic-bezier(.16, 1, .3, 1);
}

.rk-loading-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.rk-loading-card {
  position: relative;
  width: min(360px, 100%);
  min-height: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--rk-loading-radius-lg);
  background:
    linear-gradient(180deg, rgba(255,255,255,.082), rgba(255,255,255,.032)),
    var(--rk-loading-panel-strong);
  box-shadow:
    0 34px 96px rgba(0,0,0,.48),
    inset 0 1px 0 rgba(255,255,255,.09);
  backdrop-filter: blur(28px) saturate(1.32);
  overflow: visible;
  transform: translateY(18px) scale(.975);
  opacity: 0;
  transition:
    opacity 420ms cubic-bezier(.16, 1, .3, 1),
    transform 420ms cubic-bezier(.16, 1, .3, 1);
}

.rk-loading-overlay.is-visible .rk-loading-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.rk-loading-card::before {
  content: "";
  position: absolute;
  inset: -44px;
  z-index: -1;
  border-radius: 38px;
  background:
    radial-gradient(circle at 50% 46%, rgba(247,209,0,.16), transparent 34%),
    radial-gradient(circle at 50% 62%, rgba(247,209,0,.06), transparent 38%);
  filter: blur(22px);
  pointer-events: none;
}

.rk-loading-card::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(247,209,0,.52), transparent);
  filter: drop-shadow(0 0 12px rgba(247,209,0,.28));
}

.rk-loading-title {
  margin: 24px 0 0;
  color: var(--rk-loading-text);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: -.02em;
}

.rk-loading-desc {
  margin: 8px 0 0;
  color: var(--rk-loading-muted);
  font-size: 12px;
  font-weight: 800;
}

.rk-loading-progress {
  position: relative;
  overflow: hidden;
  width: 210px;
  height: 4px;
  margin-top: 22px;
  border-radius: 999px;
  background: rgba(255,255,255,.07);
}

.rk-loading-progress::before {
  content: "";
  position: absolute;
  left: -35%;
  top: 0;
  width: 38%;
  height: 100%;
  border-radius: inherit;
  background:
    linear-gradient(90deg, transparent, var(--rk-loading-yellow), rgba(255,255,255,.45), transparent);
  filter: drop-shadow(0 0 12px rgba(247,209,0,.52));
  animation: rkLoadingProgress 1.65s var(--rk-loading-ease) infinite;
}

/* ==========================================================================
   3. 인라인 로딩
   ========================================================================== */
.rk-inline-loader {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--rk-loading-text);
  font-size: 13px;
  font-weight: 900;
}

.rk-inline-loader__mark {
  position: relative;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.rk-inline-loader__mark::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(247,209,0,.18), transparent 60%);
  animation: rkInlineGlow 1.8s var(--rk-loading-ease) infinite;
}

.rk-inline-loader__mark img {
  position: relative;
  width: 22px;
  height: 22px;
  object-fit: contain;
  filter:
    brightness(0) invert(1)
    drop-shadow(0 0 10px rgba(247,209,0,.36));
  animation: rkInlineLogo 1.8s var(--rk-loading-ease) infinite;
}

.rk-inline-loader__text {
  color: var(--rk-loading-muted);
}

/* ==========================================================================
   4. 버튼 로딩
   ========================================================================== */
.rk-loading-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 128px;
  height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--rk-loading-yellow), var(--rk-loading-yellow-strong));
  color: #101010;
  font-family: var(--rk-loading-font);
  font-size: 13px;
  font-weight: 900;
  cursor: pointer;
  overflow: hidden;
  box-shadow:
    0 18px 42px rgba(247,209,0,.2),
    inset 0 1px 0 rgba(255,255,255,.46);
}

.rk-loading-button::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      110deg,
      transparent 0%,
      rgba(255,255,255,.36) 45%,
      transparent 62%
    );
  transform: translateX(-118%);
  transition: transform 760ms cubic-bezier(.16, 1, .3, 1);
}

.rk-loading-button:hover::before {
  transform: translateX(118%);
}

.rk-loading-button.is-loading {
  color: transparent;
  pointer-events: none;
}

.rk-button-loader-logo {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 22px;
  height: 22px;
  opacity: 0;
  transform: translate(-50%, -50%) scale(.88);
  pointer-events: none;
}

.rk-button-loader-logo::before {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 999px;
  background:
    radial-gradient(circle, rgba(17,17,17,.12), transparent 58%);
  opacity: 0;
}

.rk-button-loader-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter:
    brightness(0)
    drop-shadow(0 0 5px rgba(17,17,17,.28));
}

.rk-loading-button.is-loading .rk-button-loader-logo {
  opacity: 1;
  animation: rkButtonLogo 1.45s var(--rk-loading-ease) infinite;
}

.rk-loading-button.is-loading .rk-button-loader-logo::before {
  opacity: 1;
  animation: rkButtonLogoGlow 1.45s var(--rk-loading-ease) infinite;
}

/* ==========================================================================
   5. 키프레임
   ========================================================================== */
@keyframes rkLoaderHalo {
  0% {
    opacity: .34;
    transform: scale(.88) rotate(0deg);
  }
  12% {
    opacity: .52;
    transform: scale(.94) rotate(5deg);
  }
  42% {
    opacity: .92;
    transform: scale(1.06) rotate(18deg);
  }
  68% {
    opacity: .62;
    transform: scale(.99) rotate(28deg);
  }
  88% {
    opacity: .38;
    transform: scale(.92) rotate(34deg);
  }
  100% {
    opacity: .34;
    transform: scale(.88) rotate(36deg);
  }
}

@keyframes rkLogoBuildLine {
  0% {
    transform: translate(-44%, -50%) skewX(-12deg) scaleX(.18);
    opacity: 0;
  }
  14% {
    transform: translate(-38%, -50%) skewX(-12deg) scaleX(.36);
    opacity: .32;
  }
  42% {
    transform: translate(-4%, -50%) skewX(-12deg) scaleX(.88);
    opacity: .74;
  }
  64% {
    transform: translate(18%, -50%) skewX(-12deg) scaleX(.68);
    opacity: .42;
  }
  86% {
    transform: translate(38%, -50%) skewX(-12deg) scaleX(.24);
    opacity: .08;
  }
  100% {
    transform: translate(44%, -50%) skewX(-12deg) scaleX(.18);
    opacity: 0;
  }
}

@keyframes rkLogoEdgeGlow {
  0% {
    opacity: .34;
    transform: scale(.955);
  }
  18% {
    opacity: .58;
    transform: scale(.985);
  }
  46% {
    opacity: 1;
    transform: scale(1.055);
  }
  72% {
    opacity: .66;
    transform: scale(1.01);
  }
  100% {
    opacity: .34;
    transform: scale(.955);
  }
}

@keyframes rkLogoMaterialize {
  0% {
    opacity: .66;
    transform: translateY(3px) scale(.965);
  }
  18% {
    opacity: .82;
    transform: translateY(1px) scale(.99);
  }
  48% {
    opacity: 1;
    transform: translateY(-3px) scale(1.045);
  }
  76% {
    opacity: .84;
    transform: translateY(1px) scale(.998);
  }
  100% {
    opacity: .66;
    transform: translateY(3px) scale(.965);
  }
}

@keyframes rkLogoVerticalBuild {
  0% {
    transform: translate(-42px, -8px) scaleY(.28);
    opacity: 0;
  }
  16% {
    opacity: .34;
  }
  46% {
    transform: translate(0, 0) scaleY(.82);
    opacity: .78;
  }
  76% {
    transform: translate(28px, 8px) scaleY(.42);
    opacity: .22;
  }
  100% {
    transform: translate(42px, 8px) scaleY(.28);
    opacity: 0;
  }
}

@keyframes rkLoadingProgress {
  0% {
    left: -35%;
    opacity: 0;
  }
  18% {
    opacity: 1;
  }
  100% {
    left: 100%;
    opacity: 0;
  }
}

@keyframes rkInlineGlow {
  0%, 100% {
    opacity: .34;
    transform: scale(.86);
  }
  50% {
    opacity: 1;
    transform: scale(1.12);
  }
}

@keyframes rkInlineLogo {
  0%, 100% {
    opacity: .72;
    transform: scale(.9);
  }
  50% {
    opacity: 1;
    transform: scale(1.12);
  }
}

@keyframes rkButtonLogo {
  0%, 100% {
    transform: translate(-50%, -50%) scale(.9);
    opacity: .72;
  }
  48% {
    transform: translate(-50%, -50%) scale(1.14);
    opacity: 1;
  }
}

@keyframes rkButtonLogoGlow {
  0%, 100% {
    transform: scale(.82);
    opacity: .18;
  }
  48% {
    transform: scale(1.18);
    opacity: .48;
  }
}

@media (max-width: 720px) {
  .rk-loading-demo-grid {
    grid-template-columns: 1fr;
  }
}

/* Project conflict guard: keep loading component identical even if design-system.css redefines the same classes. */
.rk-loading-demo-card .rk-logo-loader,
.rk-loading-overlay .rk-logo-loader {
  position: relative !important;
  isolation: isolate !important;
  width: 172px !important;
  height: 172px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  overflow: visible !important;
}

.rk-loading-demo-card .rk-logo-loader::before,
.rk-loading-overlay .rk-logo-loader::before {
  content: "" !important;
  position: absolute !important;
  inset: -28px !important;
  z-index: 0 !important;
  border-radius: 999px !important;
  background:
    radial-gradient(circle, rgba(247,209,0,.19), transparent 42%),
    conic-gradient(from 0deg, transparent 0deg, rgba(247,209,0,.13) 42deg, rgba(255,255,255,.06) 58deg, transparent 104deg, transparent 360deg) !important;
  filter: blur(8px) !important;
  animation: rkLoaderHalo 5.2s var(--rk-loading-ease) infinite !important;
}

.rk-loading-demo-card .rk-logo-loader::after,
.rk-loading-overlay .rk-logo-loader::after {
  content: "" !important;
  position: absolute !important;
  left: -28% !important;
  top: 50% !important;
  z-index: 2 !important;
  width: 156% !important;
  height: 1.5px !important;
  background:
    linear-gradient(
      90deg,
      transparent 0%,
      rgba(247,209,0,.08) 20%,
      rgba(247,209,0,.62) 46%,
      rgba(255,255,255,.48) 52%,
      rgba(247,209,0,.18) 62%,
      transparent 100%
    ) !important;
  filter:
    drop-shadow(0 0 10px rgba(247,209,0,.48))
    drop-shadow(0 0 24px rgba(247,209,0,.16)) !important;
  opacity: 0 !important;
  transform: translateY(-50%) !important;
  animation: rkLogoBuildLine 5.2s var(--rk-loading-ease) infinite !important;
}

.rk-loading-demo-card .rk-logo-edge,
.rk-loading-overlay .rk-logo-edge {
  position: absolute !important;
  z-index: 4 !important;
  width: 112px !important;
  height: 112px !important;
  background:
    conic-gradient(
      from 0deg,
      rgba(247,209,0,.1),
      rgba(255,255,255,.96),
      rgba(247,209,0,.88),
      rgba(255,224,102,.22),
      rgba(247,209,0,.1)
    ) !important;
  -webkit-mask: url("../img/logo.svg") center / contain no-repeat !important;
  mask: url("../img/logo.svg") center / contain no-repeat !important;
  filter:
    drop-shadow(0 0 8px rgba(255,255,255,.16))
    drop-shadow(0 0 22px rgba(247,209,0,.44))
    drop-shadow(0 0 56px rgba(247,209,0,.18)) !important;
  opacity: .34 !important;
  animation: rkLogoEdgeGlow 5.2s var(--rk-loading-ease) infinite !important;
  pointer-events: none !important;
}

.rk-loading-demo-card .rk-logo-loader .rk-logo-scan,
.rk-loading-overlay .rk-logo-loader .rk-logo-scan {
  position: absolute !important;
  left: 50% !important;
  top: -20% !important;
  z-index: 5 !important;
  width: 2px !important;
  height: 140% !important;
  border-radius: 999px !important;
  background:
    linear-gradient(
      180deg,
      transparent,
      rgba(247,209,0,.18),
      rgba(255,255,255,.72),
      rgba(247,209,0,.2),
      transparent
    ) !important;
  filter:
    drop-shadow(0 0 8px rgba(247,209,0,.46))
    drop-shadow(0 0 18px rgba(247,209,0,.16)) !important;
  opacity: 0 !important;
  transform: translateX(-50%) !important;
  animation: rkLogoVerticalBuild 5.2s var(--rk-loading-ease) infinite !important;
}

.rk-loading-demo-card .rk-logo-loader .rk-logo-scan.rk-logo-scan--bottom,
.rk-loading-overlay .rk-logo-loader .rk-logo-scan.rk-logo-scan--bottom {
  top: auto !important;
  bottom: -20% !important;
  animation-delay: .18s !important;
}

.rk-loading-demo-card .rk-logo-loader img,
.rk-loading-overlay .rk-logo-loader img {
  position: relative !important;
  z-index: 3 !important;
  width: 100px !important;
  height: 100px !important;
  object-fit: contain !important;
  clip-path: none !important;
  opacity: 1 !important;
  transform: none !important;
  filter:
    brightness(0) invert(1)
    drop-shadow(0 0 7px rgba(255,255,255,.12))
    drop-shadow(0 0 18px rgba(247,209,0,.34))
    drop-shadow(0 0 44px rgba(247,209,0,.12)) !important;
  animation: rkLogoMaterialize 5.2s var(--rk-loading-ease) infinite !important;
}