/* ═══════════════════════════════════════════
   ZapChat – Complete Stylesheet
   ═══════════════════════════════════════════ */

:root {
  --bg-main: #0d1117;
  --bg-card: #161b22;
  --bg-sidebar: #161b22;
  --bg-input: #21262d;
  --bg-hover: #30363d;
  --border: #30363d;
  --border-light: #21262d;
  --accent: #3fb950;
  --accent-hover: #2ea043;
  --danger: #da3633;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-xl: 16px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'DM Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-main);
  background: var(--bg-main);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
}

/* ─── AUTH SCREEN ─────────────────────────────────────────────────────── */
.auth-screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  background: var(--bg-main);
}

.auth-screen.hidden {
  display: none !important;
}

.auth-bg {
  position: absolute; inset: 0;
  overflow: hidden;
}

.auth-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}

.auth-blob.b1 {
  width: 400px; height: 400px;
  background: var(--accent);
  top: -100px; right: -100px;
}

.auth-blob.b2 {
  width: 300px; height: 300px;
  background: #58a6ff;
  bottom: -50px; left: -50px;
}

.auth-blob.b3 {
  width: 250px; height: 250px;
  background: #bc8cff;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.auth-card {
  position: relative;
  width: min(400px, 90vw);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 40px 32px;
  animation: cardIn 0.4s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo-icon {
  width: 56px; height: 56px;
  margin: 0 auto 12px;
  background: var(--accent);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  color: var(--bg-main);
}

.auth-logo h1 {
  font-size: 28px; font-weight: 700;
  margin-bottom: 4px;
}

.auth-logo p {
  font-size: 13px;
  color: var(--text-secondary);
}

.auth-tabs {
  display: flex;
  position: relative;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 24px;
}

.auth-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 14px; font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  position: relative;
  z-index: 1;
  transition: color 0.2s;
}

.auth-tab.active {
  color: var(--text-primary);
}

.auth-tab-slider {
  position: absolute;
  top: 4px; left: 4px;
  width: calc(50% - 4px);
  height: calc(100% - 8px);
  background: var(--bg-card);
  border-radius: 6px;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

.auth-tab-slider.right {
  transform: translateX(100%);
}

.auth-panel {
  display: none;
}

.auth-panel.active {
  display: block;
}

.input-group {
  position: relative;
  margin-bottom: 16px;
}

.input-group i {
  position: absolute;
  left: 14px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

.input-group input {
  width: 100%;
  padding: 12px 14px 12px 40px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  transition: border-color 0.2s;
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent);
}

.auth-error {
  font-size: 12px;
  color: var(--danger);
  margin-bottom: 12px;
  min-height: 18px;
}

.auth-btn {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: var(--bg-main);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  gap: 8px;
  transition: background 0.2s, transform 0.15s;
}

.auth-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ─── APP LAYOUT ───────────────────────────────────────────────────────── */
.app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.app.hidden {
  display: none !important;
}

/* ─── SIDEBAR ──────────────────────────────────────────────────────────── */
.sidebar {
  width: 340px;
  min-width: 340px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  display: flex; align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.me-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 16px;
  color: var(--bg-main);
  flex-shrink: 0;
}

.me-info {
  flex: 1;
  min-width: 0;
}

.me-name {
  font-weight: 600; font-size: 15px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.me-status {
  font-size: 11px; color: var(--text-secondary);
}

.sidebar-actions {
  display: flex; gap: 4px;
}

.icon-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 15px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-search {
  padding: 12px 16px;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.sidebar-search i {
  position: absolute;
  left: 30px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 13px;
}

.sidebar-search input {
  width: 100%;
  padding: 10px 14px 10px 36px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 13px;
}

.sidebar-search input:focus {
  outline: none;
  border-color: var(--accent);
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.s-tab {
  flex: 1;
  padding: 12px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 13px; font-weight: 500;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  gap: 6px;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.s-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.s-tab:hover {
  color: var(--text-primary);
}

.contact-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.contact-list.hidden {
  display: none;
}

.contact-item {
  display: flex; align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
}

.contact-item:hover {
  background: var(--bg-hover);
}

.contact-item.active {
  background: var(--bg-input);
}

.c-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--bg-input);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 16px;
  flex-shrink: 0;
  position: relative;
}

.c-avatar.online::after {
  content: '';
  position: absolute;
  bottom: 2px; right: 2px;
  width: 10px; height: 10px;
  background: var(--accent);
  border: 2px solid var(--bg-sidebar);
  border-radius: 50%;
}

.c-info {
  flex: 1;
  min-width: 0;
}

.c-name {
  font-weight: 600; font-size: 14px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.c-last {
  font-size: 12px; color: var(--text-secondary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.c-last.typing {
  color: var(--accent);
}

.c-meta {
  text-align: right;
  flex-shrink: 0;
}

.c-time {
  font-size: 11px; color: var(--text-muted);
  margin-bottom: 4px;
}

.c-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--bg-main);
  font-size: 10px; font-weight: 700;
  border-radius: 10px;
  padding: 1px 7px;
  min-width: 20px;
  text-align: center;
}

.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 48px 24px;
  text-align: center;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 40px;
  margin-bottom: 12px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 13px;
  line-height: 1.5;
}

/* ─── CHAT PANEL ───────────────────────────────────────────────────────── */
.chat-panel {
  flex: 1;
  display: flex; flex-direction: column;
  background: var(--bg-main);
}

.chat-empty {
  flex: 1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 48px;
  color: var(--text-secondary);
}

.chat-empty.hidden {
  display: none !important;
}

.chat-empty-icon {
  width: 80px; height: 80px;
  margin-bottom: 24px;
  background: var(--accent);
  border-radius: 24px;
  display: flex; align-items: center; justify-content: center;
  font-size: 36px;
  color: var(--bg-main);
}

.chat-empty h2 {
  font-size: 24px; font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.chat-empty p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.encryption-badge {
  display: inline-flex; align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px; font-weight: 500;
  color: var(--accent);
}

.active-chat {
  flex: 1;
  display: flex; flex-direction: column;
}

.active-chat.hidden {
  display: none !important;
}

.chat-topbar {
  display: flex; align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.back-btn {
  display: none;
}

.chat-topbar-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-input);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 16px;
  flex-shrink: 0;
}

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

.chat-topbar-name {
  font-weight: 600; font-size: 15px;
}

.chat-topbar-sub {
  font-size: 11px; color: var(--text-secondary);
}

.chat-topbar-actions {
  display: flex; gap: 4px;
}

.messages-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex; flex-direction: column;
  gap: 4px;
}

.messages-date-divider {
  text-align: center;
  margin: 16px 0;
}

.messages-date-divider span {
  display: inline-block;
  padding: 4px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 11px; font-weight: 500;
  color: var(--text-secondary);
}

.msg-row {
  display: flex;
  margin-bottom: 8px;
  animation: msgIn 0.2s ease-out;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.msg-row.sent {
  justify-content: flex-end;
}

.msg-row.received {
  justify-content: flex-start;
}

.msg-bubble {
  max-width: 70%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  position: relative;
}

.msg-row.sent .msg-bubble {
  background: var(--accent);
  color: var(--bg-main);
  border-bottom-right-radius: 4px;
}

.msg-row.received .msg-bubble {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.msg-text {
  font-size: 14px;
  line-height: 1.5;
  word-wrap: break-word;
}

.msg-meta {
  display: flex; align-items: center;
  gap: 4px;
  margin-top: 4px;
  font-size: 10px;
}

.msg-row.sent .msg-meta {
  justify-content: flex-end;
  color: rgba(0,0,0,0.5);
}

.msg-row.received .msg-meta {
  color: var(--text-muted);
}

.msg-status {
  font-size: 10px;
}

.msg-status.read {
  color: var(--accent);
}

.typing-dots {
  display: flex; gap: 4px;
  padding: 8px 0;
}

.typing-dots span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: dotPulse 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotPulse {
  0%, 60%, 100% { opacity: 0.3; transform: scale(0.8); }
  30% { opacity: 1; transform: scale(1); }
}

.composer {
  display: flex; align-items: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  position: relative;
}

.emoji-btn {
  margin-bottom: 4px;
}

.emoji-picker {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
  max-width: 320px;
  z-index: 100;
}

.emoji-picker.hidden {
  display: none;
}

.emoji-btn-item {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s;
}

.emoji-btn-item:hover {
  background: var(--bg-hover);
}

.composer-input-wrap {
  flex: 1;
}

.composer-input-wrap textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  resize: none;
  max-height: 120px;
  line-height: 1.5;
  transition: border-color 0.2s;
}

.composer-input-wrap textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.send-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-main);
  border: none;
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s, transform 0.15s;
  flex-shrink: 0;
}

.send-btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

/* ─── TOASTS ───────────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 99999;
  display: flex; flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  box-shadow: var(--shadow-card);
  animation: slideInRight 0.3s ease-out;
  pointer-events: auto;
  cursor: pointer;
  max-width: 320px;
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

.toast-title {
  font-weight: 600; font-size: 13px;
  margin-bottom: 2px;
}

.toast-body {
  font-size: 12px; color: var(--text-secondary);
}

/* ─── VIDEO / VOICE CALL MODAL ─────────────────────────────────────────── */
.call-modal {
  position: fixed; inset: 0;
  z-index: 10000;
  display: flex; align-items: center; justify-content: center;
}

.call-modal.hidden {
  display: none !important;
}

.call-modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
}

.call-modal-inner {
  position: relative;
  width: min(900px, 94vw);
  height: min(600px, 88vh);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  display: grid;
  grid-template-columns: 1fr 220px;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  animation: cardIn 0.4s cubic-bezier(0.34,1.56,0.64,1);
}

.call-header {
  grid-column: 1 / -1;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.call-title {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 15px;
}

.call-title i { color: var(--accent); }

.call-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-secondary);
}

.call-status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #f59e0b;
}

.call-status-dot.connected { background: var(--accent); }

.call-stage {
  position: relative;
  background: #000;
  overflow: hidden;
}

.call-remote-grid {
  width: 100%; height: 100%;
  display: grid; gap: 4px;
  grid-template-columns: 1fr;
  place-items: center;
}

.call-remote-video {
  width: 100%; height: 100%;
  object-fit: cover;
  background: #000;
}

.call-empty {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  color: var(--text-muted);
  text-align: center; padding: 24px;
}

.call-empty i { font-size: 40px; opacity: 0.4; }
.call-empty p { font-size: 13px; }

.call-local-pip {
  position: absolute;
  bottom: 16px; right: 16px;
  width: 140px; height: 100px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border-light);
  background: #111;
  box-shadow: var(--shadow-card);
}

.call-local-pip video {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* mirror like a selfie cam */
}

.call-local-label {
  position: absolute; bottom: 4px; left: 6px;
  font-size: 10px; color: white;
  background: rgba(0,0,0,0.5);
  padding: 1px 6px; border-radius: 4px;
}

.call-local-mic-off {
  position: absolute; top: 4px; right: 4px;
  width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
  background: var(--danger);
  color: white; font-size: 10px;
  border-radius: 50%;
}

.call-local-mic-off.hidden {
  display: none;
}

.call-roster {
  border-left: 1px solid var(--border);
  background: var(--bg-sidebar);
  padding: 16px;
  overflow-y: auto;
}

.call-roster-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.call-roster-count {
  background: var(--accent);
  color: #0d1117;
  font-size: 10px; font-weight: 700;
  border-radius: 10px;
  padding: 1px 7px;
  margin-left: auto;
}

.call-roster-list {
  list-style: none;
  display: flex; flex-direction: column; gap: 8px;
}

.call-controls {
  grid-column: 1 / -1;
  display: flex; align-items: center; justify-content: center; gap: 14px;
  padding: 18px;
  border-top: 1px solid var(--border);
}

.call-ctrl {
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 16px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.call-ctrl:hover { background: var(--bg-hover); transform: translateY(-2px); }

.call-ctrl-danger {
  background: var(--danger);
  color: white;
}

.call-ctrl-danger:hover { background: #dc2626; }

/* ─── MOBILE RESPONSIVE ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    min-width: 100%;
  }

  .sidebar.hidden-mobile {
    display: none !important;
  }

  .chat-panel {
    display: none;
    position: fixed; inset: 0;
    z-index: 100;
    background: var(--bg-main);
  }

  .chat-panel.visible {
    display: flex !important;
  }

  .back-btn {
    display: flex !important;
  }

  .msg-bubble {
    max-width: 85%;
  }

  .call-modal-inner {
    grid-template-columns: 1fr;
    width: 100vw; height: 100vh;
    border-radius: 0;
  }

  .call-roster { display: none; }
}

/* ─── SCROLLBAR ────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}