/* ================================================================
   KRYPTIX — Secure Mesh Messenger
   Clean Responsive Stylesheet
   ================================================================ */

/* ─── Design Tokens ─────────────────────────────────────────── */
:root {
  color-scheme: dark;
  --bg: #0a1118;
  --bg2: rgba(10, 17, 24, 0.92);
  --panel: rgba(14, 22, 30, 0.95);
  --panel2: rgba(18, 28, 36, 0.98);
  --surf: rgba(255, 255, 255, 0.05);
  --surf2: rgba(255, 255, 255, 0.08);
  --brd: rgba(130, 200, 210, 0.16);
  --brd2: rgba(130, 200, 210, 0.28);
  --txt: #eaf5f8;
  --txt2: #8fa8b0;
  --acc: #5eebd8;
  --acc2: #1eb8a5;
  --acc-s: rgba(94, 235, 216, 0.12);
  --red: #ff6b67;
  --red-s: rgba(255, 107, 103, 0.12);
  --grn: #7ee4a8;
  --grn-s: rgba(126, 228, 168, 0.1);
  --ylw: #f0c87a;
  --ylw-s: rgba(240, 200, 122, 0.1);
  --shd: 0 20px 60px rgba(0, 0, 0, 0.35);
  --ui: "Space Grotesk", sans-serif;
  --mono: "IBM Plex Mono", monospace;
  --out-bg: linear-gradient(145deg, rgba(30, 184, 165, 0.2), rgba(18, 90, 82, 0.25));
  --in-bg: rgba(255, 255, 255, 0.04);
}

body[data-theme="light"] {
  color-scheme: light;
  --bg: #f2ede5;
  --bg2: rgba(242, 237, 229, 0.92);
  --panel: rgba(255, 250, 242, 0.96);
  --panel2: rgba(255, 248, 238, 0.99);
  --surf: rgba(18, 28, 34, 0.04);
  --surf2: rgba(18, 28, 34, 0.07);
  --brd: rgba(28, 70, 78, 0.12);
  --brd2: rgba(28, 70, 78, 0.22);
  --txt: #161f26;
  --txt2: #5c6c74;
  --acc: #0c8a82;
  --acc2: #0a6f69;
  --acc-s: rgba(12, 138, 130, 0.1);
  --red: #c24248;
  --red-s: rgba(194, 66, 72, 0.1);
  --grn: #17704a;
  --grn-s: rgba(23, 112, 74, 0.08);
  --ylw: #966800;
  --ylw-s: rgba(150, 104, 0, 0.08);
  --shd: 0 20px 60px rgba(30, 24, 16, 0.1);
  --out-bg: linear-gradient(145deg, rgba(12, 138, 130, 0.14), rgba(12, 138, 130, 0.2));
  --in-bg: rgba(16, 26, 32, 0.03);
}

/* ─── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--ui);
  color: var(--txt);
  background: radial-gradient(ellipse at 10% 0%, rgba(30, 184, 165, 0.12), transparent 40%),
              radial-gradient(ellipse at 90% 5%, rgba(220, 150, 80, 0.08), transparent 35%),
              var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior-y: contain;
}
button, input, textarea { font: inherit; }
button { border: 0; background: none; color: inherit; cursor: pointer; }

/* ─── App Shell ─────────────────────────────────────────────── */
.app-shell {
  min-height: 100vh;
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
}

/* ─── Top Bar ───────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border: 1px solid var(--brd);
  border-radius: 16px;
  background: var(--bg2);
  backdrop-filter: blur(20px);
  box-shadow: var(--shd);
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.brand-block { min-width: 0; }
.brand {
  font-family: var(--mono);
  font-size: clamp(1rem, 3vw, 1.4rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--acc);
}
.brand-sub {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--txt2);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--brd);
  background: var(--surf);
  font-size: 0.8rem;
  white-space: nowrap;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--txt2);
  flex-shrink: 0;
}
.status-pill[data-tone="ready"] { border-color: rgba(126, 228, 168, 0.3); background: var(--grn-s); }
.status-pill[data-tone="ready"] .status-dot { background: var(--grn); }
.status-pill[data-tone="pending"] { border-color: var(--brd2); background: var(--acc-s); }
.status-pill[data-tone="pending"] .status-dot { background: var(--acc); }
.status-pill[data-tone="danger"] { border-color: rgba(255, 107, 103, 0.3); background: var(--red-s); }
.status-pill[data-tone="danger"] .status-dot { background: var(--red); }

.btn-icon {
  width: 38px; height: 38px;
  border-radius: 12px;
  border: 1px solid var(--brd);
  background: var(--surf);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  transition: background 0.15s;
}
.btn-icon:hover { background: var(--surf2); }

/* ─── Main Layout ───────────────────────────────────────────── */
.main-layout {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
  border: 1px solid var(--brd);
  border-radius: 20px;
  background: var(--panel);
  padding: 20px;
  box-shadow: var(--shd);
}
.card-muted {
  background: var(--surf);
  box-shadow: none;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.card-header h2 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.step-badge {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--acc), var(--acc2));
  color: #041112;
  font-weight: 700;
  font-size: 0.82rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.help-text {
  margin: 0 0 14px;
  color: var(--txt2);
  font-size: 0.88rem;
  line-height: 1.5;
}

/* ─── Form Fields ───────────────────────────────────────────── */
.field {
  margin-bottom: 14px;
}
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--txt);
}
.field-hint {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--txt2);
}

.input-wrap {
  display: flex;
  align-items: center;
  border: 1px solid var(--brd);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.15s, background 0.15s;
}
.input-wrap:focus-within {
  border-color: var(--brd2);
  background: rgba(255, 255, 255, 0.05);
}

input, textarea {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--txt);
  padding: 12px 14px;
  outline: none;
  resize: none;
  font-size: 0.92rem;
}
input::placeholder, textarea::placeholder { color: var(--txt2); }

.input-btn {
  padding: 0 12px;
  font-size: 0.78rem;
  font-family: var(--mono);
  color: var(--txt2);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.9rem;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:active:not([disabled]) { transform: scale(0.97); }
.btn[disabled] { opacity: 0.4; cursor: not-allowed; }

.btn-accent {
  background: linear-gradient(135deg, var(--acc), var(--acc2));
  color: #041112;
}
.btn-accent:hover:not([disabled]) { filter: brightness(1.06); }

.btn-outline {
  border: 1px solid var(--brd);
  background: var(--surf);
  color: var(--txt);
}
.btn-outline:hover:not([disabled]) { background: var(--surf2); }

.btn-small {
  min-height: 32px;
  padding: 0 12px;
  font-size: 0.78rem;
  border-radius: 10px;
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

/* ─── ID Display ────────────────────────────────────────────── */
.id-display {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--panel2);
  border: 1px solid var(--brd);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.id-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--txt2);
  flex-shrink: 0;
}
.id-display code {
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--acc);
  word-break: break-all;
  flex: 1;
  min-width: 0;
}

/* ─── Peer List ─────────────────────────────────────────────── */
.peer-count {
  font-size: 0.8rem;
  color: var(--txt2);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--brd);
  background: var(--surf);
}

.peer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.peer-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--brd);
  border-radius: 14px;
  background: var(--panel2);
}
.peer-card-info {
  min-width: 0;
  flex: 1;
}
.peer-card-name {
  font-family: var(--mono);
  font-size: 0.84rem;
  word-break: break-all;
}
.peer-card-status {
  font-size: 0.74rem;
  color: var(--txt2);
}
.peer-card-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.badge {
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--brd);
  white-space: nowrap;
}
.badge-ok { border-color: rgba(126, 228, 168, 0.3); background: var(--grn-s); color: var(--grn); }
.badge-wait { border-color: var(--brd2); background: var(--acc-s); color: var(--acc); }
.badge-off { border-color: rgba(255, 107, 103, 0.3); background: var(--red-s); color: var(--red); }

/* ─── Chat Panel ────────────────────────────────────────────── */
.chat-area {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.chat-panel {
  border: 1px solid var(--brd);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: var(--shd);
  display: flex;
  flex-direction: column;
  min-height: 340px;
  overflow: hidden;
}

.chat-header {
  padding: 16px 18px;
  border-bottom: 1px solid var(--brd);
  background: var(--panel2);
}
.chat-header h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
}
.chat-header p {
  margin: 4px 0 0;
  font-size: 0.82rem;
  color: var(--txt2);
}

.timeline {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-padding-bottom: 20px;
}

.empty-state {
  margin: auto;
  text-align: center;
  padding: 30px 20px;
  border: 1px dashed var(--brd);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.015);
}
.empty-state h3 { margin: 0 0 8px; font-size: 1.05rem; }
.empty-state p { margin: 0; color: var(--txt2); font-size: 0.88rem; }

/* message entries */
.entry {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 85%;
}
.entry.out { align-self: flex-end; }
.entry.in { align-self: flex-start; }
.entry.sys { align-self: center; max-width: 100%; }

.entry-bubble {
  border: 1px solid var(--brd);
  border-radius: 18px;
  padding: 12px 14px;
  background: var(--in-bg);
  line-height: 1.5;
}
.entry.out .entry-bubble {
  background: var(--out-bg);
  border-color: rgba(94, 235, 216, 0.22);
}
.entry.sys .entry-bubble {
  border-radius: 999px;
  padding: 8px 14px;
  text-align: center;
  font-size: 0.82rem;
  background: var(--surf);
}
.entry.sys[data-tone="success"] .entry-bubble { border-color: rgba(126, 228, 168, 0.25); background: var(--grn-s); color: var(--grn); }
.entry.sys[data-tone="danger"] .entry-bubble { border-color: rgba(255, 107, 103, 0.25); background: var(--red-s); color: var(--red); }
.entry.sys[data-tone="warning"] .entry-bubble { border-color: rgba(240, 200, 122, 0.25); background: var(--ylw-s); color: var(--ylw); }

.entry-sender {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--txt2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.entry-time {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--txt2);
}
.entry.out .entry-time { text-align: right; }
.entry p { margin: 0; white-space: pre-wrap; word-break: break-word; }

/* file entries */
.file-card { display: flex; flex-direction: column; gap: 8px; }
.file-preview { border-radius: 12px; overflow: hidden; border: 1px solid var(--brd); background: var(--surf); }
.file-preview img { display: block; width: 100%; max-height: 220px; object-fit: cover; }
.file-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid var(--brd);
  background: var(--surf);
  color: var(--txt);
  text-decoration: none;
  font-size: 0.82rem;
}

/* ─── Composer ──────────────────────────────────────────────── */
.composer {
  display: flex;
  gap: 10px;
  padding: 12px 16px 14px;
  border-top: 1px solid var(--brd);
  background: var(--panel2);
  align-items: flex-end;
}
.composer-wrap {
  flex: 1;
  min-height: 0;
}
.composer textarea {
  min-height: 44px;
  max-height: 160px;
  line-height: 1.45;
  padding: 10px 14px;
}
.composer .btn {
  flex-shrink: 0;
  min-width: 70px;
}

/* ─── Media Bar ─────────────────────────────────────────────── */
.media-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--brd);
  background: var(--surf);
  color: var(--txt);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s;
}
.btn-pill:hover:not([disabled]) { background: var(--surf2); }
.btn-pill[disabled] { opacity: 0.4; cursor: not-allowed; }
.btn-danger-pill {
  border-color: rgba(255, 107, 103, 0.25);
  background: var(--red-s);
  color: var(--red);
}

/* ─── Media Grid ────────────────────────────────────────────── */
.media-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.media-tile {
  border: 1px solid var(--brd);
  border-radius: 18px;
  background: var(--panel2);
  overflow: hidden;
  min-height: 200px;
  display: flex;
  flex-direction: column;
}
.media-stage {
  flex: 1;
  min-height: 160px;
  background: rgba(0, 0, 0, 0.15);
  position: relative;
}
.media-stage video {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.audio-stage {
  width: 100%; height: 100%;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--txt2);
}
.audio-wave {
  width: 60px; height: 60px;
  border-radius: 50%;
  border: 1px solid var(--brd);
  display: grid;
  place-items: center;
  color: var(--acc);
  background: var(--surf);
  font-size: 1.4rem;
}
.media-info {
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.media-title { font-family: var(--mono); font-size: 0.84rem; }
.media-copy { color: var(--txt2); font-size: 0.82rem; }

/* ─── Footer ────────────────────────────────────────────────── */
.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 8px;
  padding: 8px;
  color: var(--txt2);
  font-size: 0.8rem;
  text-align: center;
}
.footer a {
  color: var(--acc);
  text-decoration: none;
}
.footer a:hover { text-decoration: underline; }

/* ─── Toasts ────────────────────────────────────────────────── */
.toast-wrap {
  position: fixed;
  bottom: 16px;
  right: 16px;
  left: 16px;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  padding: 12px 16px;
  border: 1px solid var(--brd);
  border-radius: 14px;
  background: var(--bg2);
  backdrop-filter: blur(16px);
  box-shadow: var(--shd);
  font-size: 0.88rem;
  line-height: 1.45;
  animation: toast-in 0.2s ease-out;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.toast[data-tone="danger"] { border-color: rgba(255, 107, 103, 0.3); background: rgba(60, 18, 18, 0.95); }
.toast[data-tone="success"] { border-color: rgba(126, 228, 168, 0.3); background: rgba(16, 48, 32, 0.95); }
.toast[data-tone="warning"] { border-color: rgba(240, 200, 122, 0.3); background: rgba(64, 50, 12, 0.95); }

/* ================================================================
   RESPONSIVE
   ================================================================ */

/* ─── Tablet+ (640px) ───────────────────────────────────────── */
@media (min-width: 640px) {
  .app-shell { padding: 16px; }
  .topbar { border-radius: 18px; padding: 12px 20px; }
  .media-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
  .toast-wrap { left: auto; width: min(380px, calc(100vw - 32px)); }
}

/* ─── Desktop (900px) ───────────────────────────────────────── */
@media (min-width: 900px) {
  .app-shell { padding: 18px 24px; }

  .main-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 18px;
  }

  .setup-panel {
    width: 380px;
    min-width: 340px;
    max-width: 420px;
    flex-shrink: 0;
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scrollbar-width: thin;
    scrollbar-color: var(--brd) transparent;
  }

  .chat-area {
    flex: 1;
    min-width: 0;
  }

  .chat-panel {
    min-height: calc(100vh - 200px);
  }

  .entry { max-width: 70%; }

  .btn-icon:hover { background: var(--surf2); }
  .btn-pill:hover:not([disabled]) { background: var(--surf2); }
}

/* ─── Wide Desktop (1200px) ─────────────────────────────────── */
@media (min-width: 1200px) {
  .setup-panel { width: 420px; max-width: 450px; }
  .entry { max-width: 65%; }
}

/* ─── Mobile-specific ───────────────────────────────────────── */
@media (max-width: 899px) {
  .setup-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .chat-panel {
    min-height: 50vh;
    scroll-margin-top: 70px;
  }

  .composer textarea {
    min-height: 50px;
  }
}

@media (max-width: 479px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .topbar-actions {
    justify-content: space-between;
  }
  .brand-sub { font-size: 0.72rem; }
}