:root {
  --page-bg-start: #f5f7fb;
  --page-bg-end: #edf2ff;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --surface-soft: #f2f6ff;
  --border: #e2e8f0;
  --text-main: #182033;
  --text-muted: #6b7280;
  --bubble-in: #eef2ff;
  --bubble-own: #3b82f6;
  --bubble-own-text: #ffffff;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --shadow-soft: 0 12px 35px rgba(15, 23, 42, 0.1);
}

:root[data-theme="dark"] {
  --page-bg-start: #0f172a;
  --page-bg-end: #1e293b;
  --surface: #111827;
  --surface-muted: #1f2937;
  --surface-soft: #1e293b;
  --border: #334155;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --bubble-in: #273449;
  --bubble-own: #2563eb;
  --bubble-own-text: #eff6ff;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --danger: #f87171;
  --shadow-soft: 0 18px 42px rgba(2, 6, 23, 0.45);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

html,
body {
  height: 100%;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 16px;
  background: linear-gradient(145deg, var(--page-bg-start), var(--page-bg-end));
  color: var(--text-main);
}

p {
  margin-bottom: 0 !important;
}

.messageContainer {
  position: relative;
  width: min(100%, 760px);
  height: min(86vh, 900px);
  display: flex;
  flex-direction: column;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.messageHeader {
  display: flex;
  align-items: center;
  min-height: 70px;
  padding: 0 22px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(6px);
}

.messageHeader h1 {
  color: var(--text-main);
  font-size: clamp(1.15rem, 1rem + 0.5vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.messageBody {
  flex: 1;
  padding: 18px 14px 8px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--surface) 94%, #ffffff 6%) 0%,
    color-mix(in srgb, var(--surface) 88%, #0f172a 12%) 100%
  );
  overflow-y: auto;
  scroll-behavior: smooth;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.post {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  width: 100%;
  max-width: 100%;
  padding: 2px 4px;
  animation: postAppear 0.22s ease;
}

.postContent {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  max-width: min(78%, 620px);
}

.profilePicture {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid #dbe3f1;
  background: #ffffff;
  flex-shrink: 0;
}

.userName {
  margin-left: 4px;
  color: var(--text-muted);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.message {
  width: fit-content;
  max-width: 100%;
  padding: 10px 13px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--border) 85%, #ffffff 15%);
  background-color: var(--bubble-in);
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.4;
  word-break: break-word;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

.postActions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 2px;
}

.postActionButton {
  display: grid;
  place-items: center;
  border: 1px solid transparent;
  background: transparent;
  color: #64748b;
  cursor: pointer;
  font-size: 0.95rem;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  transition: all 0.2s ease;
}

.postActionButton:hover {
  background-color: #edf2ff;
  border-color: #d8e2ff;
  color: #334155;
  transform: scale(1.03);
}

.postActionButton.delete {
  color: #b91c1c;
}

.postActionButton.delete:hover {
  background-color: #fee2e2;
  border-color: #fecaca;
}

/* Owner messages are identified by presence of edit/delete actions. */
.post:has(.postActions .postActionButton) {
  flex-direction: row-reverse;
}

.post:has(.postActions .postActionButton) .postContent {
  align-items: flex-end;
}

.post:has(.postActions .postActionButton) .userName {
  margin-left: 0;
  margin-right: 6px;
  text-align: right;
}

.post:has(.postActions .postActionButton) .message {
  background: linear-gradient(145deg, var(--bubble-own), #2563eb);
  color: var(--bubble-own-text);
  border-color: transparent;
}

.messageFooter {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background-color: var(--surface);
}

.messageFooter input {
  flex: 1;
  min-width: 0;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: none;
  padding: 0 14px;
  font-size: 0.95rem;
  color: var(--text-main);
  background-color: var(--surface-muted);
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease;
}

.messageFooter input:focus {
  border-color: #93c5fd;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.14);
  background-color: #ffffff;
}

.messageFooter p {
  font-size: 0.78rem;
  color: var(--text-muted);
  min-width: 58px;
  text-align: center;
}

.messageFooter button {
  width: 42px;
  height: 42px;
  border: 1px solid transparent;
  border-radius: 12px;
  outline: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.messageFooter #sendButton {
  background-color: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(59, 130, 246, 0.34);
}

.messageFooter #sendButton:hover,
.messageFooter #sendButton:focus-visible {
  background-color: var(--accent-hover);
  transform: translateY(-1px) scale(1.02);
}

.messageFooter #settingsButton {
  background-color: #eef2ff;
  color: #475569;
  border-color: #dbe3ff;
}

.messageFooter #settingsButton:hover,
.messageFooter #settingsButton:focus-visible {
  background-color: #e0e8ff;
  color: #334155;
  transform: translateY(-1px) scale(1.02);
}

.messageFooter #themeButton {
  background-color: #eff6ff;
  color: #475569;
  border-color: #dbeafe;
}

.messageFooter #themeButton:hover,
.messageFooter #themeButton:focus-visible {
  background-color: #dbeafe;
  color: #1d4ed8;
  transform: translateY(-1px) scale(1.02);
}

.settings {
  display: none;
  position: absolute;
  right: 12px;
  bottom: 68px;
  z-index: 8;
  width: min(92%, 430px);
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 20px 38px rgba(15, 23, 42, 0.16);
  backdrop-filter: blur(8px);
}

:root[data-theme="dark"] .messageFooter #themeButton {
  background-color: #1e3a8a;
  color: #dbeafe;
  border-color: #1d4ed8;
}

:root[data-theme="dark"] .messageFooter #themeButton:hover,
:root[data-theme="dark"] .messageFooter #themeButton:focus-visible {
  background-color: #1d4ed8;
  color: #eff6ff;
}

:root[data-theme="dark"] .messageFooter #settingsButton {
  background-color: #273449;
  color: #cbd5e1;
  border-color: #3b4a63;
}

:root[data-theme="dark"] .messageFooter #settingsButton:hover,
:root[data-theme="dark"] .messageFooter #settingsButton:focus-visible {
  background-color: #334155;
  color: #f8fafc;
}

:root[data-theme="dark"] .settings {
  background: rgba(17, 24, 39, 0.96);
}

:root[data-theme="dark"] .settings #pfpInputLabel {
  border-color: #3b4a63;
  color: #cbd5e1;
}

:root[data-theme="dark"] .settings #pfpInputLabel:hover {
  color: #bfdbfe;
  background-color: #1e3a8a;
}

:root[data-theme="dark"] .messageBody::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #475569, #334155);
}

:root[data-theme="dark"] .messageBody::-webkit-scrollbar-track {
  background: #1f2937;
}

.settings .category {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 10px 0;
  padding: 8px 4px;
}

.settings div p {
  margin-right: 0;
  color: var(--text-main);
  font-size: 0.9rem;
}

.settings #usernameInput {
  width: 180px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background-color: var(--surface-muted);
  height: 36px;
  padding: 0 10px;
  font-size: 0.9rem;
  color: var(--text-main);
  outline: none;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.settings #usernameInput:focus {
  border-color: #93c5fd;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.14);
}

.settings #pfpSection {
  align-items: center;
}

.settings #pfpP {
  text-align: left;
}

.settings #pfpInputLabel {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid #d9e3fa;
  font-size: 1.2rem;
  color: #475569;
  cursor: pointer;
  transition: all 0.2s ease;
}

.settings #pfpInputLabel:hover {
  color: #1d4ed8;
  background-color: #eef2ff;
  transform: scale(1.03);
}

.settings #pfpPreview {
  width: 42px;
  height: 42px;
  margin-right: 0;
  border: 1px solid #dbe3f1;
  border-radius: 999px;
  object-fit: cover;
}

.settings #pfpInput {
  display: none;
}

.messageBody::-webkit-scrollbar {
  width: 8px;
}

.messageBody::-webkit-scrollbar-thumb {
  border-radius: 10px;
  background: linear-gradient(180deg, #cbd5e1, #94a3b8);
}

.messageBody::-webkit-scrollbar-track {
  background: #f1f5f9;
}

@keyframes postAppear {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media screen and (max-width: 900px) {
  body {
    padding: 14px 10px;
  }

  .messageContainer {
    height: calc(100vh - 28px);
    border-radius: 14px;
  }

  .postContent {
    max-width: 82%;
  }
}

@media screen and (max-width: 560px) {
  .messageHeader {
    min-height: 62px;
    padding: 0 14px;
  }

  .messageBody {
    padding: 12px 8px 6px;
  }

  .profilePicture {
    width: 34px;
    height: 34px;
  }

  .postContent {
    max-width: 84%;
  }

  .messageFooter {
    gap: 8px;
    padding: 10px 8px;
  }

  .messageFooter input {
    height: 42px;
  }

  .messageFooter button {
    width: 40px;
    height: 40px;
  }

  .settings {
    right: 8px;
    bottom: 62px;
    width: calc(100% - 16px);
  }

  .settings .category {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .settings #usernameInput {
    width: 100%;
  }
}