:root {
  color-scheme: dark;
  --page: #061018;
  --panel: rgba(7, 15, 24, 0.78);
  --panel-strong: rgba(8, 19, 30, 0.92);
  --line: rgba(255, 255, 255, 0.15);
  --line-strong: rgba(105, 233, 210, 0.38);
  --text: rgba(255, 255, 255, 0.94);
  --muted: rgba(255, 255, 255, 0.68);
  --soft: rgba(255, 255, 255, 0.08);
  --cyan: #6de7ff;
  --green: #6ef0b2;
  --gold: #f6d37c;
  --rose: #ff6f9d;
  --danger: #ff7777;
  --ink: #081018;
  font-family: "Tajawal", "Cairo", system-ui, -apple-system, Segoe UI, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(3, 8, 13, 0.34), rgba(3, 8, 13, 0.86)),
    linear-gradient(90deg, rgba(4, 53, 48, 0.56), rgba(54, 12, 30, 0.42)),
    url("/assets/salfa-desktop.png") center bottom / cover fixed,
    var(--page);
  overflow-x: hidden;
}

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.62;
}

a {
  color: inherit;
  text-decoration: none;
}

.app-shell {
  width: 100%;
  min-height: 100vh;
  padding: clamp(12px, 2vw, 28px);
}

.topbar,
.lock-panel,
.key-card,
.room-panel,
.messages-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.36);
  backdrop-filter: blur(18px);
}

.topbar {
  width: min(1180px, 100%);
  min-height: 58px;
  margin: 0 auto clamp(14px, 2vw, 24px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 18px;
}

.brand,
.top-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand {
  font-weight: 950;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: var(--ink);
  background: linear-gradient(135deg, var(--green), var(--cyan) 54%, var(--gold));
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.3);
  font-size: 0.88rem;
  font-weight: 950;
}

.top-actions a,
.primary-button,
.secondary-button,
.danger-button,
.key-field button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 13px;
  padding: 0 14px;
  font-weight: 900;
}

.top-actions a,
.secondary-button,
.key-field button {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.08);
}

.primary-button {
  color: var(--ink);
  background: linear-gradient(135deg, var(--green), var(--cyan));
}

.danger-button {
  border-color: rgba(255, 119, 119, 0.42);
  color: #ffe8e8;
  background: rgba(255, 119, 119, 0.13);
}

.top-actions a:hover,
.secondary-button:hover,
.key-field button:hover {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.13);
}

.secure-layout {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.lock-panel {
  min-height: min(680px, calc(100vh - 118px));
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  padding: clamp(18px, 4vw, 46px);
  border-radius: 24px;
}

.lock-copy {
  max-width: 650px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 14px;
  font-size: clamp(2.5rem, 7vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: 0;
}

.lock-copy p,
.security-note,
.room-text,
.file-note,
.messages-head span,
.message-meta,
.system-message {
  color: var(--muted);
  line-height: 1.65;
}

.lock-copy p {
  max-width: 590px;
  font-size: 1.12rem;
}

.key-card {
  display: grid;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 24px);
  border-radius: 20px;
  background: var(--panel-strong);
}

label {
  display: grid;
  gap: 7px;
}

label > span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
  font-weight: 850;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.24);
  outline: none;
}

input {
  min-height: 46px;
  padding: 0 13px;
}

textarea {
  min-height: 58px;
  max-height: 142px;
  resize: vertical;
  padding: 11px 13px;
  line-height: 1.5;
}

input:focus,
textarea:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 3px rgba(109, 231, 255, 0.13);
}

.key-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.key-actions,
.room-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.key-actions > *,
.room-actions > * {
  flex: 1 1 130px;
}

.security-note {
  margin: 0;
  padding: 12px;
  border: 1px solid rgba(246, 211, 124, 0.25);
  border-radius: 14px;
  background: rgba(246, 211, 124, 0.08);
  font-size: 0.92rem;
}

.chat-panel {
  min-height: calc(100vh - 118px);
  display: grid;
  grid-template-columns: minmax(280px, 0.34fr) minmax(0, 1fr);
  gap: 14px;
}

.room-panel,
.messages-card {
  border-radius: 22px;
}

.room-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(16px, 2.5vw, 24px);
}

.room-panel h1 {
  font-size: clamp(2rem, 4vw, 3.7rem);
}

.status-grid {
  display: grid;
  gap: 10px;
}

.status-grid div {
  min-height: 72px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
}

.status-grid span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 850;
}

.status-grid strong {
  overflow-wrap: anywhere;
  font-size: 1.35rem;
}

.messages-card {
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(260px, 1fr) auto auto;
  background: rgba(5, 11, 18, 0.82);
}

.messages-head {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.messages-head div {
  display: grid;
  gap: 4px;
}

.messages {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  overflow-y: auto;
  scroll-behavior: smooth;
}

.message {
  width: min(680px, 86%);
  display: grid;
  gap: 7px;
  align-self: flex-start;
  padding: 12px 13px;
  border: 1px solid var(--line);
  border-radius: 18px 18px 18px 6px;
  background: rgba(255, 255, 255, 0.08);
}

.message.is-own {
  align-self: flex-end;
  border-radius: 18px 18px 6px 18px;
  border-color: rgba(110, 240, 178, 0.3);
  background: rgba(110, 240, 178, 0.13);
}

.message-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 850;
}

.message-body {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.6;
}

.file-card {
  display: grid;
  gap: 7px;
}

.file-card strong {
  overflow-wrap: anywhere;
}

.file-card small {
  color: var(--muted);
}

.file-card a {
  width: fit-content;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: 0 12px;
  color: var(--ink);
  background: linear-gradient(135deg, var(--gold), var(--green));
  font-weight: 950;
}

.system-message {
  align-self: center;
  max-width: min(620px, 94%);
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  text-align: center;
  font-size: 0.9rem;
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 9px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
}

.message-input {
  min-width: 0;
}

.file-note {
  margin: 0;
  padding: 0 14px 14px;
  font-size: 0.88rem;
}

.toast {
  position: fixed;
  z-index: 20;
  inset-inline: 18px;
  bottom: 18px;
  width: fit-content;
  max-width: min(520px, calc(100vw - 36px));
  margin-inline-start: auto;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  color: var(--text);
  background: rgba(5, 11, 18, 0.94);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.34);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 860px) {
  body {
    background-attachment: scroll;
  }

  .topbar,
  .messages-head {
    align-items: stretch;
    flex-direction: column;
  }

  .top-actions {
    flex-wrap: wrap;
  }

  .lock-panel,
  .chat-panel {
    grid-template-columns: 1fr;
  }

  .lock-panel {
    align-items: stretch;
  }

  .room-panel {
    justify-content: start;
  }

  .status-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .app-shell {
    padding: 10px;
  }

  .lock-panel,
  .room-panel,
  .messages-card {
    border-radius: 18px;
  }

  .key-field,
  .composer,
  .status-grid {
    grid-template-columns: 1fr;
  }

  .message {
    width: 94%;
  }
}