/* @sekai-vendor @sekai/design@v0.1.0 css/layout/chat.css */
/* SPDX-License-Identifier: Apache-2.0 */
/* SPDX-FileCopyrightText: 2026 The 25-ji-code-de Team */

/* ============================================================
   Chat — bar, message list, message row, composer
   ============================================================ */

/* ---------- Top bar ---------- */
.sekai-bar {
  height: var(--sekai-bar-height);
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sekai-space-sm);
  padding: 0 var(--sekai-space-lg);
  background: rgb(var(--sekai-surface) / 0.8);
  border-bottom: var(--sekai-hairline-divider);
}

.sekai-bar__title {
  font-size: var(--sekai-text-md);
  font-weight: var(--sekai-weight-semibold);
}

/* Decorative traffic lights. Purely ornamental — they are not
   window controls and must never be the only way to do anything. */
.sekai-window-dots {
  margin-left: auto;
  display: flex;
  gap: var(--sekai-space-sm);
}

.sekai-window-dots > i {
  width: 12px;
  height: 12px;
  border-radius: var(--sekai-radius-full);
  display: inline-block;
}

.sekai-window-dots > i:nth-child(1) {
  background: #62c4ed;
}
.sekai-window-dots > i:nth-child(2) {
  background: #f5c03b;
}
.sekai-window-dots > i:nth-child(3) {
  background: #f25a64;
}

/* ---------- Message list ---------- */
.sekai-messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--sekai-space-lg) 0;
  overflow-y: auto;
  overflow-x: hidden;
}

/* ---------- Message row ---------- */
.sekai-message {
  position: relative;
  display: flex;
  gap: var(--sekai-space-md);
  padding: var(--sekai-space-sm) var(--sekai-space-lg);
  transition: background var(--sekai-dur-instant);
}

/* Darken rather than lighten: on both worlds' canvases a dark wash
   reads as "under the cursor" without competing with the accent. */
.sekai-message:hover {
  background: rgb(4 4 5 / 0.07);
}

.sekai-message__body {
  flex: 1;
  min-width: 0;
}

.sekai-message__header {
  display: flex;
  align-items: baseline;
  gap: var(--sekai-space-sm);
  margin-bottom: var(--sekai-space-2xs);
}

.sekai-message__author {
  font-size: var(--sekai-text-lg);
  font-weight: var(--sekai-weight-semibold);
}

.sekai-message__time {
  font-family: var(--sekai-font-mono);
  font-size: var(--sekai-text-label);
  color: rgb(var(--sekai-fg-muted));
}

.sekai-message__text {
  margin: 0;
  font-size: var(--sekai-text-lg);
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Being mentioned is the one row-level state that gets a colour.
   Warning amber, strip on the left, padding compensated so the text
   does not shift. */
.sekai-message.is-mentioned {
  background: rgb(var(--sekai-warning) / 0.1);
  border-left: 2px solid rgb(var(--sekai-warning));
  padding-left: 14px;
}

.sekai-message.is-mentioned:hover {
  background: rgb(var(--sekai-warning) / 0.15);
}

/* Jump-to-reply target: pulses once, then holds a tint long enough
   to find with your eyes. */
.sekai-message.is-highlighted {
  background: rgb(var(--sekai-accent-deep) / 0.2);
  animation: sekai-message-pulse 2s ease-out;
}

@keyframes sekai-message-pulse {
  0% {
    background: rgb(var(--sekai-accent-deep) / 0.4);
  }
  100% {
    background: rgb(var(--sekai-accent-deep) / 0.2);
  }
}

/* ---------- Hover action ----------
   Hidden by default, rises into place on row hover. pointer-events
   is off while hidden so it can never eat a click it isn't showing
   an affordance for. */
.sekai-message__action {
  position: absolute;
  top: -12px;
  right: var(--sekai-space-md);
  z-index: var(--sekai-z-raised);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgb(var(--sekai-surface));
  border: var(--sekai-hairline-divider);
  border-radius: var(--sekai-radius-xs);
  /* Off-ladder on purpose, one alpha step darker than elev-1. At 32px
     this chip has almost no area to cast with, so it needs a tighter,
     darker shadow than a card does to read as detached at all. */
  box-shadow: 0 2px 4px rgb(0 0 0 / 0.3);
  color: rgb(var(--sekai-fg-muted));
  cursor: pointer;
  opacity: 0;
  transform: translateY(4px) scale(0.95);
  pointer-events: none;
  transition:
    opacity var(--sekai-dur-fast) ease-out,
    transform var(--sekai-dur-fast) ease-out,
    background var(--sekai-dur-instant);
}

.sekai-message:hover .sekai-message__action {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.sekai-message__action:hover {
  background: rgb(var(--sekai-canvas));
  border-color: rgb(var(--sekai-line-strong) / var(--sekai-line-strong-a));
  color: rgb(var(--sekai-fg));
  /* Likewise: 8px spread, not elev-2's 12px. The chip lifts, it does
     not bloom. */
  box-shadow: 0 4px 8px rgb(0 0 0 / 0.4);
  transform: translateY(0) scale(1.05);
}

.sekai-message__action:active {
  transform: translateY(0) scale(0.95);
}

.sekai-message__action svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ---------- Composer ---------- */
.sekai-composer {
  position: relative;
  padding: var(--sekai-space-lg);
  overflow: visible; /* upload menus and progress escape upward */
}

.sekai-composer__actions {
  display: flex;
  align-self: flex-start;
  gap: var(--sekai-space-sm);
  margin-top: 5px;
}

/* ---------- Suggestion list ----------
   Mentions and sticker autocomplete. Anchored above the composer. */
.sekai-suggest {
  position: absolute;
  bottom: 100%;
  left: 0;
  z-index: var(--sekai-z-modal);
  width: 240px;
  max-height: 240px;
  margin-bottom: var(--sekai-space-sm);
  background: rgb(var(--sekai-surface-raised));
  border: var(--sekai-hairline);
  border-radius: var(--sekai-radius-xs);
  box-shadow: 0 -4px 12px rgb(0 0 0 / 0.3);
  overflow-y: auto;
}

.sekai-suggest[hidden],
.sekai-suggest.is-hidden {
  display: none;
}

.sekai-suggest__item {
  display: flex;
  align-items: center;
  gap: var(--sekai-space-sm);
  padding: var(--sekai-space-sm) var(--sekai-space-md);
  color: rgb(var(--sekai-fg-muted));
  font-size: var(--sekai-text-md);
  cursor: pointer;
}

.sekai-suggest__item:hover,
.sekai-suggest__item.is-active {
  background: rgb(var(--sekai-surface-hover));
  color: rgb(var(--sekai-fg));
}

.sekai-suggest__preview {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  object-fit: contain;
  margin-right: var(--sekai-space-2xs);
  background: rgb(0 0 0 / 0.1);
  border-radius: var(--sekai-radius-xs);
}

.sekai-suggest__label {
  font-weight: var(--sekai-weight-semibold);
  color: rgb(var(--sekai-fg));
  font-size: var(--sekai-text-md);
}

.sekai-suggest__desc {
  font-size: var(--sekai-text-label);
  color: rgb(var(--sekai-fg-muted));
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- Responsive ---------- */
@media screen and (max-width: 768px) {
  .sekai-messages {
    padding: var(--sekai-space-md) 0;
  }

  .sekai-message {
    padding: var(--sekai-space-sm) var(--sekai-space-md);
  }

  .sekai-window-dots {
    display: none;
  }

  .sekai-composer {
    padding: var(--sekai-space-md);
  }
}

@media screen and (max-width: 480px) {
  .sekai-message__author,
  .sekai-message__text {
    font-size: var(--sekai-text-md);
  }

  .sekai-message__time {
    font-size: var(--sekai-text-meta);
  }

  /* Opaque and safe-area padded: the composer must cover whatever
     scrolls under it and clear the iPhone home indicator. */
  .sekai-composer {
    padding: var(--sekai-space-sm);
    padding-bottom: max(var(--sekai-space-sm), env(safe-area-inset-bottom));
    background: rgb(var(--sekai-canvas));
  }

  .sekai-composer .sekai-input-shell {
    min-height: 44px;
    padding: var(--sekai-space-xs) 10px;
    gap: var(--sekai-space-sm);
  }

  .sekai-composer__actions {
    gap: 2px;
  }

  .sekai-suggest {
    width: calc(100vw - 48px);
    max-width: 280px;
  }
}

@media screen and (max-width: 768px) and (orientation: landscape) {
  .sekai-bar {
    height: 40px;
  }

  .sekai-composer {
    padding: var(--sekai-space-sm) var(--sekai-space-md);
  }
}