/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #ffffff;
  --fg:        #1a1a1a;
  --fg-dim:    #888888;
  --fg-muted:  #cccccc;
  --accent:    #e0e0e0;
  --border:    #e8e8e8;
  --font:      '游明朝体', '游明朝', 'Yu Mincho', 'YuMincho', serif;
  --form-h:    220px;
}

html, body {
  width: 100%;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  overflow-x: hidden;
}

.hidden { display: none !important; }

/* ============================================================
   NIGHT MODE — 16:04〜04:03 は画面・文字を反転
   ============================================================ */
body.night {
  --bg:       #0d0d0d;
  --fg:       #e5e5e5;
  --fg-dim:   #888888;
  --fg-muted: #555555;
  --accent:   #1f1f1f;
  --border:   #2a2a2a;
}

body.night #loading,
body.night #terms-modal,
body.night #the-end {
  background: #0d0d0d;
}

body.night #waveform {
  background: #1a1a1a;
}

body.night .end-404-code,
body.night .end-404-msg {
  color: #666;
}

body.night .chaos-text {
  color: #e5e5e5;
}
body.night .chaos-text.rain {
  color: #e5e5e5;
}

body.night #end-404 {
  background: #0d0d0d;
}

body.night .post-item:hover {
  background: rgba(13, 13, 13, 0.94);
  color: #e5e5e5 !important;
}

/* ============================================================
   LOADING
   ============================================================ */
#loading {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 9999;
  font-size: 24px;
  color: var(--fg-dim);
}

.blink {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ============================================================
   LAYOUT
   ============================================================ */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  padding-bottom: 0;
}

/* ============================================================
   HEADER
   ============================================================ */
#site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  backdrop-filter: blur(4px);
  width: 100%;
}

.site-title {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--fg-dim);
}

.counter {
  font-size: 12px;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
}

/* ============================================================
   EMPTY STATE
   ============================================================ */
#empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 60vh;
}

.err-block {
  text-align: center;
  user-select: none;
}

.err-code {
  font-size: clamp(80px, 20vw, 160px);
  font-weight: 400;
  color: var(--fg-muted);
  letter-spacing: -0.04em;
  line-height: 1;
}

.err-msg {
  font-size: 14px;
  color: var(--fg-dim);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-top: 8px;
}

.err-sub {
  font-size: 11px;
  color: var(--fg-muted);
  margin-top: 12px;
  letter-spacing: 0.1em;
}

/* ============================================================
   FEED
   ============================================================ */
#feed-area {
  flex: 1;
  overflow: hidden;
  position: relative;
  min-height: 0;
  width: 100%;
}

#posts-list {
  list-style: none;
  position: relative;
  width: 100%;
  height: 100%;
}

.post-item {
  position: absolute;
  padding: 2px 5px;
  transition: opacity 2s linear, background 0.35s ease, color 0.25s ease;
  max-width: 38vw;
  /* opacity, top, left set inline via JS */
}

.post-item:hover {
  opacity: 1 !important;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  color: #1a1a1a !important;
  transition: opacity 0.35s ease, background 0.35s ease, color 0.25s ease;
  cursor: default;
}

.post-item.extending {
  animation: extend-pulse 0.6s ease forwards;
}

@keyframes extend-pulse {
  0%   { opacity: 1; }
  30%  { opacity: 0.15; }
  100% { opacity: 1; }
}

.post-item.vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  max-width: none;
  max-height: 38vh;
}

.post-text-content {
  font-size: 13px;
  line-height: 1.7;
  word-break: break-all;
  white-space: pre-wrap;
}


.post-audio-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-play {
  background: none;
  border: 1px solid var(--fg-dim);
  color: var(--fg-dim);
  font-family: var(--font);
  font-size: 11px;
  padding: 4px 10px;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: color 0.2s, border-color 0.2s;
}

.btn-play:hover {
  color: var(--fg);
  border-color: var(--fg);
}

.btn-play.playing {
  color: #606060;
  border-color: #606060;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.post-meta {
  font-size: 10px;
  color: var(--fg-muted);
  margin-top: 6px;
  letter-spacing: 0.05em;
}

/* ============================================================
   BOTTOM POST BAR
   ============================================================ */
#post-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  z-index: 200;
}

#bar-collapsed {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  cursor: pointer;
}

.btn-expand {
  background: none;
  border: none;
  color: var(--fg-dim);
  font-family: var(--font);
  font-size: 12px;
  letter-spacing: 0.2em;
  cursor: pointer;
  padding: 4px 0;
  transition: color 0.2s;
}

.btn-expand:hover { color: var(--fg); }
.btn-expand:disabled { cursor: default; opacity: 0.3; }

.bar-notice {
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
}

#bar-form {
  position: relative;
  padding: 14px 20px 20px;
  border-top: 1px solid var(--border);
}

.btn-collapse {
  position: absolute;
  top: 10px;
  right: 16px;
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: var(--font);
  font-size: 12px;
  cursor: pointer;
  padding: 2px 6px;
  transition: color 0.2s;
}

.btn-collapse:hover { color: var(--fg); }

/* ============================================================
   FORM TABS
   ============================================================ */
.form-tabs {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
}

.ftab {
  background: none;
  border: none;
  color: var(--fg-muted);
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.2em;
  cursor: pointer;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.ftab.active {
  color: var(--fg);
  border-bottom-color: var(--fg-dim);
}

.fpanel { display: none; }
.fpanel.active { display: block; }

/* ============================================================
   TEXT PANEL
   ============================================================ */
#text-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--fg);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  resize: none;
  padding: 6px 0;
  outline: none;
  height: 80px;
}

#text-input::placeholder { color: var(--fg-muted); }

/* ============================================================
   AUDIO PANEL
   ============================================================ */
#waveform {
  display: block;
  width: 100%;
  height: 48px;
  background: #f5f5f5;
  border: 1px solid var(--border);
  margin-bottom: 10px;
}

.rec-info {
  font-size: 11px;
  color: var(--fg-muted);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.rec-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}

.btn-rec {
  background: none;
  border: 1px solid var(--fg-muted);
  color: var(--fg-muted);
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.2em;
  padding: 5px 14px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.btn-rec:hover:not(:disabled) {
  color: var(--fg);
  border-color: var(--fg);
}

.btn-rec:disabled { opacity: 0.3; cursor: default; }

.btn-rec.recording {
  color: #cc3333;
  border-color: #cc3333;
  animation: pulse 0.8s ease-in-out infinite;
}

.rec-timer {
  font-size: 20px;
  color: var(--fg-dim);
  min-width: 24px;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
}

#audio-preview {
  width: 100%;
  height: 28px;
  margin-bottom: 8px;
}

/* ============================================================
   FORM FOOTER
   ============================================================ */
.form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.char-counter {
  font-size: 11px;
  color: var(--fg-muted);
}

.btn-submit {
  background: none;
  border: 1px solid var(--fg-dim);
  color: var(--fg-dim);
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.2em;
  padding: 5px 18px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.btn-submit:hover:not(:disabled) {
  color: var(--fg);
  border-color: var(--fg);
}

.btn-submit:disabled {
  opacity: 0.3;
  cursor: default;
}

/* ============================================================
   TERMS MODAL
   ============================================================ */
#terms-modal {
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

#terms-modal.hidden {
  display: none;
}

#terms-box {
  max-width: 480px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#terms-box h1 {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--fg);
  font-weight: normal;
}

#terms-box p {
  font-size: 12px;
  color: var(--fg-dim);
  line-height: 1.8;
}

#terms-box ul {
  padding-left: 1.2em;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#terms-box li {
  font-size: 12px;
  color: var(--fg-dim);
  line-height: 1.8;
}

#btn-agree {
  align-self: flex-end;
  margin-top: 8px;
  background: none;
  border: 1px solid var(--fg-dim);
  color: var(--fg-dim);
  font-family: var(--font);
  font-size: 11px;
  letter-spacing: 0.2em;
  padding: 8px 20px;
  cursor: pointer;
}

#btn-agree:hover {
  color: var(--fg);
  border-color: var(--fg);
}

/* ============================================================
   THE END OVERLAY
   ============================================================ */
#the-end {
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 9000;
  overflow: hidden;
}

#chaos-texts {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Individual chaos text element */
.chaos-text {
  position: absolute;
  left: 50%;
  top: 50%;
  white-space: nowrap;
  pointer-events: none;
  font-family: var(--font);
  color: #000;
  will-change: transform, opacity;
  transform: translate(var(--sx), var(--sy)) rotate(var(--sr));
  opacity: var(--io);
}

/* パターン0: 縦雨（旧来） */
.chaos-text.rain {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  animation: chaos-fly var(--dur) linear var(--delay) infinite;
}

/* パターン1: 横書き→縦書き 反時計回り昇天 */
.chaos-text.p1 {
  writing-mode: horizontal-tb;
  animation: chaos-h-to-v-ccw var(--dur) linear var(--delay) 1 both;
}

/* パターン2: 横書き→縦書き 時計回り昇天 */
.chaos-text.p2 {
  writing-mode: horizontal-tb;
  animation: chaos-h-to-v-cw var(--dur) linear var(--delay) 1 both;
}

/* パターン3: 縦書きでゆらゆら昇天 */
.chaos-text.p3 {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  animation: chaos-float-v var(--dur) linear var(--delay) 1 both;
}

@keyframes chaos-fly {
  from {
    transform: translate(var(--sx), var(--sy)) rotate(var(--sr));
    opacity: var(--io);
  }
  to {
    transform: translate(var(--ex), var(--ey)) rotate(var(--er));
    opacity: 0;
  }
}

@keyframes chaos-h-to-v-ccw {
  0% {
    transform: translate(var(--sx), var(--sy)) rotate(var(--sr));
    opacity: var(--io); color: #000;
  }
  45% {
    transform: translate(calc(var(--sx) + var(--sw1)), calc(var(--sy) - 45vh)) rotate(calc(var(--sr) - 50deg));
    opacity: calc(var(--io) * 0.6); color: #555;
  }
  100% {
    transform: translate(var(--sx), calc(var(--sy) - 115vh)) rotate(calc(var(--sr) - 90deg));
    opacity: 0; color: #ccc;
  }
}

@keyframes chaos-h-to-v-cw {
  0% {
    transform: translate(var(--sx), var(--sy)) rotate(var(--sr));
    opacity: var(--io); color: #000;
  }
  45% {
    transform: translate(calc(var(--sx) + var(--sw1)), calc(var(--sy) - 45vh)) rotate(calc(var(--sr) + 50deg));
    opacity: calc(var(--io) * 0.6); color: #555;
  }
  100% {
    transform: translate(var(--sx), calc(var(--sy) - 115vh)) rotate(calc(var(--sr) + 90deg));
    opacity: 0; color: #ccc;
  }
}

@keyframes chaos-float-v {
  0% {
    transform: translate(var(--sx), var(--sy)) rotate(var(--sr));
    opacity: var(--io); color: #000;
  }
  40% {
    transform: translate(calc(var(--sx) + var(--sw1)), calc(var(--sy) - 42vh)) rotate(calc(var(--sr) + 2deg));
    opacity: calc(var(--io) * 0.5); color: #777;
  }
  100% {
    transform: translate(var(--sx), calc(var(--sy) - 115vh)) rotate(var(--sr));
    opacity: 0; color: #ccc;
  }
}

@keyframes chaos-fade {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes last-post-fade {
  0%   { color: #000; opacity: 1; }
  15%  { color: #000; opacity: 0.2; }
  30%  { color: #000; opacity: 1; }
  50%  { color: #111; opacity: 0.2; }
  70%  { color: #111; opacity: 1; }
  85%  { color: #222; opacity: 0.3; }
  100% { color: #333; opacity: 0; }
}

/* 404 NOT FOUND full-screen reveal */
#end-404 {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 1.2s ease;
}

#end-404.visible {
  opacity: 1;
}

.end-404-code {
  font-size: clamp(80px, 20vw, 160px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: #888;
  font-family: var(--font);
}

.end-404-msg {
  font-size: 14px;
  letter-spacing: 0.3em;
  color: #888;
  font-family: var(--font);
  margin-top: 8px;
}

.end-timer {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #333;
  letter-spacing: 0.3em;
  font-family: var(--font);
  pointer-events: none;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--fg-muted); }

/* ============================================================
   RESPONSIVE — SMARTPHONE
   ============================================================ */
@media (max-width: 600px) {
  #text-input {
    height: 160px;
  }

  .end-404-code {
    font-size: clamp(80px, 20vw, 160px);
  }

  .end-404-msg {
    font-size: 14px;
  }
}