/* ═══════════════════════════════════════════════
   FOCUS — 카메라 초점 시뮬레이터
   style.css
   폰트: Share Tech Mono (HUD/숫자), Noto Sans KR (한글)
   테마: 카메라 뷰파인더 — 딥블랙 + 앰버 액센트
═══════════════════════════════════════════════ */

/* ── 커스텀 프로퍼티 ─────────────────────────── */
:root {
  --c-bg:          #0a0a0c;
  --c-panel:       #111116;
  --c-panel-2:     #18181f;
  --c-border:      #2a2a35;
  --c-border-dim:  rgba(255,255,255,0.07);

  --c-amber:       #f5a623;
  --c-amber-dim:   rgba(245,166,35,0.25);
  --c-amber-glow:  rgba(245,166,35,0.08);
  --c-green:       #39ff88;
  --c-green-dim:   rgba(57,255,136,0.3);
  --c-white-dim:   rgba(255,255,255,0.55);
  --c-white-faint: rgba(255,255,255,0.15);

  --font-mono: 'Share Tech Mono', monospace;
  --font-sans: 'Noto Sans KR', sans-serif;

  --vf-radius:  12px;
  --dial-size:  130px;
  --dial-size-sm: 100px;

  --transition-fast:   0.12s ease;
  --transition-medium: 0.25s ease;
  --transition-slow:   0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ── 리셋 & 베이스 ───────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--c-bg);
  color: var(--c-white-dim);
  font-family: var(--font-sans);
  font-weight: 300;
  touch-action: none;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100dvh;
}


/* ═══════════════════════════════════════════════
   VIEWFINDER
═══════════════════════════════════════════════ */

.viewfinder-wrap {
  flex: 1 1 auto;
  width: 100%;
  max-width: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 12px 0;
  min-height: 0;
}

.viewfinder {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  max-height: 100%;
  border-radius: var(--vf-radius);
  overflow: hidden;
  background: #0a0f1a;
  /* 바깥 테두리: 카메라 바디 느낌 */
  box-shadow:
    0 0 0 1px var(--c-border),
    0 0 0 3px #0a0a0c,
    0 0 30px rgba(0,0,0,0.8),
    inset 0 0 60px rgba(0,0,0,0.4);
}


/* ── SVG 씬 & 레이어 ─────────────────────────── */

.scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  /* CSS transition은 JS에서 개별 제어하므로 기본만 */
  will-change: filter;
}

/* 각 레이어의 초기 filter 상태 — JS가 덮어씀 */
.layer--bg  { z-index: 1; }
.layer--mid { z-index: 2; }
.layer--fg  { z-index: 3; }


/* ── 뷰파인더 오버레이 ────────────────────────── */

.vf-overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none; /* AF 포인트만 pointer-events: auto */
}

/* 격자선 */
.vf-grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* 코너 브라켓 */
.vf-corners {
  position: absolute;
  inset: 0;
}

.corner {
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: var(--c-amber);
  border-style: solid;
  opacity: 0.7;
}

.corner--tl { top: 10px;    left: 10px;    border-width: 2px 0 0 2px; border-radius: 3px 0 0 0; }
.corner--tr { top: 10px;    right: 10px;   border-width: 2px 2px 0 0; border-radius: 0 3px 0 0; }
.corner--bl { bottom: 10px; left: 10px;    border-width: 0 0 2px 2px; border-radius: 0 0 0 3px; }
.corner--br { bottom: 10px; right: 10px;   border-width: 0 2px 2px 0; border-radius: 0 0 3px 0; }


/* ── HUD ─────────────────────────────────────── */

.vf-hud {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--c-amber);
  letter-spacing: 0.08em;
  pointer-events: none;
}

.vf-hud--tl { top: 14px; left: 16px; }
.vf-hud--tr { top: 14px; right: 16px; }
.vf-hud--bc {
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.1em;
  transition: color var(--transition-medium);
}
.vf-hud--bc.is-locked {
  color: var(--c-green);
}

.hud-label {
  opacity: 0.6;
  font-size: 10px;
  vertical-align: middle;
  margin-right: 2px;
}
.hud-value {
  font-size: 14px;
  font-weight: normal;
}


/* ── AF 포인트 ───────────────────────────────── */

.af-point {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: auto;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.af-point__box {
  width: 38px;
  height: 38px;
  border: 1.5px solid rgba(255,255,255,0.3);
  border-radius: 3px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.af-point__label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.3);
  transition: color var(--transition-fast);
}

/* 활성(초점 맞는) 상태 */
.af-point.is-active .af-point__box {
  border-color: var(--c-green);
  box-shadow: 0 0 8px var(--c-green-dim), inset 0 0 4px rgba(57,255,136,0.05);
}
.af-point.is-active .af-point__label {
  color: var(--c-green);
}

/* AF 확정 깜빡임 애니메이션 */
.af-point.is-locking .af-point__box {
  animation: af-lock 0.35s ease forwards;
}

@keyframes af-lock {
  0%   { border-color: rgba(255,255,255,0.3); box-shadow: none; }
  30%  { border-color: var(--c-green); box-shadow: 0 0 16px var(--c-green), 0 0 32px var(--c-green-dim); }
  60%  { border-color: var(--c-green); box-shadow: 0 0 6px var(--c-green-dim); }
  100% { border-color: var(--c-green); box-shadow: 0 0 8px var(--c-green-dim); }
}

/* 탭 피드백 */
.af-point:active .af-point__box {
  border-color: rgba(255,255,255,0.7);
}


/* ═══════════════════════════════════════════════
   DOF INDICATOR
═══════════════════════════════════════════════ */

.dof-indicator {
  flex: 0 0 auto;
  width: 100%;
  max-width: 480px;
  padding: 10px 20px 6px;
}

.dof-bar-wrap {
  position: relative;
  height: 6px;
  background: var(--c-border);
  border-radius: 3px;
  margin-bottom: 6px;
}

/* 피사체 위치 점 */
.dof-subject {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-white-faint);
  border: 1.5px solid rgba(255,255,255,0.35);
  transition: background var(--transition-fast), border-color var(--transition-fast);
  z-index: 3;
}

/* 피사체 점이 선명 구간 안에 들어오면 강조 */
.dof-subject.in-range {
  background: var(--c-amber);
  border-color: var(--c-amber);
  box-shadow: 0 0 6px var(--c-amber-dim);
}

/* 라벨 (::after pseudo) */
.dof-subject::after {
  content: attr(data-label);
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 9px;
  color: rgba(255,255,255,0.35);
  white-space: nowrap;
  letter-spacing: 0.05em;
}

/* 선명 구간 블록 */
.dof-range {
  position: absolute;
  top: 0;
  height: 100%;
  background: var(--c-amber);
  opacity: 0.35;
  border-radius: 3px;
  transition: left var(--transition-fast), width var(--transition-fast);
  z-index: 1;
}

/* 현재 포커스 마커 */
.dof-focus-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 3px;
  height: 16px;
  background: var(--c-amber);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--c-amber-dim);
  transition: left var(--transition-fast);
  z-index: 4;
}

.dof-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 9px;
  color: rgba(255,255,255,0.25);
  letter-spacing: 0.06em;
  padding: 0 2px;
}


/* ═══════════════════════════════════════════════
   CONTROLS (슬라이더 패널)
═══════════════════════════════════════════════ */

.controls {
  flex: 0 0 auto;
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 20px 18px;
}


/* ── 슬라이더 래퍼 ─────────────────────────── */

.slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.slider-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
}

.slider-value {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--c-amber);
  min-width: 52px;
  text-align: right;
}

.slider-value--aperture {
  color: #80aaff;
}


/* ── 슬라이더 트랙 컨테이너 ─────────────────── */

.slider-track-wrap {
  position: relative;
  height: 36px;          /* 터치 영역 확보 */
  display: flex;
  align-items: center;
}


/* ── range input 공통 리셋 ──────────────────── */

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: transparent;
  outline: none;
  cursor: pointer;
  position: relative;
  z-index: 1;
}

/* 트랙 배경 (JS가 --pct CSS 변수로 채워진 부분 색 조절) */
.slider--focus {
  background: linear-gradient(
    to right,
    var(--c-amber) 0%,
    var(--c-amber) var(--pct, 85%),
    var(--c-border) var(--pct, 85%),
    var(--c-border) 100%
  );
}

.slider--aperture {
  background: linear-gradient(
    to right,
    #80aaff 0%,
    #80aaff var(--pct, 0%),
    var(--c-border) var(--pct, 0%),
    var(--c-border) 100%
  );
}

/* ── Webkit thumb ───────────────────────────── */

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.12);
  cursor: grab;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.slider:active::-webkit-slider-thumb {
  cursor: grabbing;
  transform: scale(1.15);
}

.slider--focus::-webkit-slider-thumb {
  background: radial-gradient(circle at 35% 35%, #ffd060, var(--c-amber));
  box-shadow: 0 0 0 4px var(--c-amber-dim), 0 2px 8px rgba(0,0,0,0.5);
}

.slider--focus:active::-webkit-slider-thumb {
  box-shadow: 0 0 0 7px var(--c-amber-dim), 0 2px 10px rgba(0,0,0,0.5);
}

.slider--aperture::-webkit-slider-thumb {
  background: radial-gradient(circle at 35% 35%, #b0ccff, #80aaff);
  box-shadow: 0 0 0 4px rgba(128,170,255,0.2), 0 2px 8px rgba(0,0,0,0.5);
}

.slider--aperture:active::-webkit-slider-thumb {
  box-shadow: 0 0 0 7px rgba(128,170,255,0.25), 0 2px 10px rgba(0,0,0,0.5);
}

/* ── Firefox thumb ──────────────────────────── */

.slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.12);
  cursor: grab;
}

.slider--focus::-moz-range-thumb {
  background: var(--c-amber);
  box-shadow: 0 0 0 4px var(--c-amber-dim);
}

.slider--aperture::-moz-range-thumb {
  background: #80aaff;
  box-shadow: 0 0 0 4px rgba(128,170,255,0.2);
}

/* Firefox 트랙 */
.slider--focus::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--c-border);
}

.slider--aperture::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--c-border);
}


/* ── 조리개 스탑 눈금 라벨 ─────────────────── */

.aperture-stops {
  display: flex;
  justify-content: space-between;
  padding: 0 2px;
  /* thumb 중심이 트랙 끝단에 위치하므로 thumb 반폭(12px)만큼 양쪽 패딩 */
  padding: 0 12px;
}

.aperture-stops span {
  font-family: var(--font-mono);
  font-size: 8.5px;
  color: rgba(180,200,255,0.35);
  letter-spacing: 0.02em;
  text-align: center;
  flex: 1;
}

/* 현재 선택된 스탑 강조 (JS가 .is-active 클래스 토글) */
.aperture-stops span.is-active {
  color: #80aaff;
  font-size: 9.5px;
}


/* ═══════════════════════════════════════════════
   BOKEH 빛망울 (SVG 내 circle — JS가 r/opacity 조절)
═══════════════════════════════════════════════ */

.bokeh {
  will-change: r, opacity;
  /* SVG 속성 transition은 CSS로 안 되므로 JS에서 처리 */
}


/* ═══════════════════════════════════════════════
   AF 탭 힌트 오버레이 (최초 진입 온보딩)
═══════════════════════════════════════════════ */

.onboarding-hint {
  position: absolute;
  bottom: 14%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.65);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.06em;
  white-space: nowrap;
  pointer-events: none;
  z-index: 20;
  animation: hint-fade 3.5s ease forwards;
}

@keyframes hint-fade {
  0%   { opacity: 0; transform: translateX(-50%) translateY(6px); }
  15%  { opacity: 1; transform: translateX(-50%) translateY(0); }
  75%  { opacity: 1; }
  100% { opacity: 0; }
}


/* ═══════════════════════════════════════════════
   유틸리티 / 접근성
═══════════════════════════════════════════════ */

/* 포커스 링 제거 (touch UI) */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 2px;
}

/* 모션 감소 선호 시 애니메이션 비활성 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}


/* ═══════════════════════════════════════════════
   반응형 — 가로 모드 / 큰 화면 보정
═══════════════════════════════════════════════ */

@media (max-height: 700px) {
  .controls {
    padding: 6px 16px 10px;
    gap: 6px;
  }

  .dof-indicator {
    padding: 6px 20px 4px;
  }

  .slider-track-wrap {
    height: 28px;
  }
}

@media (max-height: 580px) {
  .controls {
    padding: 4px 14px 8px;
    gap: 4px;
  }
}

/* 데스크탑: 세로 중앙 배치 */
@media (min-width: 600px) {
  body {
    justify-content: center;
  }

  .viewfinder-wrap {
    padding: 16px 16px 0;
  }
}