* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --primary: #1976D2;
  --primary-dark: #0D1B2A;
  --primary-light: #42A5F5;
  --accent: #F57C00;
  --accent-light: #FFB74D;
  --bg: #F5F5F5;
  --surface: #FFFFFF;
  --chat-bg: #E3F2FD;
  --text: #212121;
  --text-sec: #757575;
  --text-white: #FFFFFF;
  --online: #4CAF50;
  --offline: #9E9E9E;
  --error: #F44336;
  --success: #4CAF50;
  --border: #E0E0E0;
  --bubble-sent: #1976D2;
  --bubble-recv: #FFFFFF;
  --tick: #2196F3;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  max-width: 430px;
  margin: 0 auto;
  height: 100vh;
  overflow: hidden;
  color: var(--text);
}

.hidden { display: none !important; }

/* ========== SCREENS ========== */
.screen { display: none; height: 100vh; flex-direction: column; background: var(--bg); }
.screen.active { display: flex; }

/* ========== LOGIN SCREEN ========== */
#loginScreen {
  background: var(--primary);
  justify-content: center;
  align-items: center;
  padding: 24px;
}
.logo-circle {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 8px;
}
.logo-circle span { font-size: 42px; font-weight: bold; color: white; }
.logo-title { font-size: 28px; font-weight: bold; color: white; }
.logo-subtitle { font-size: 14px; color: rgba(255,255,255,0.8); margin-bottom: 24px; }

.card {
  background: white; border-radius: 16px; padding: 24px;
  width: 100%; max-width: 380px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.tabs { display: flex; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); margin-bottom: 20px; }
.tab { flex: 1; padding: 10px; text-align: center; font-weight: bold; font-size: 13px; cursor: pointer; background: white; color: var(--text-sec); border: none; }
.tab.active { background: var(--accent); color: white; }

.form-input {
  width: 100%; padding: 14px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg);
  font-size: 14px; margin-bottom: 12px; outline: none;
  font-family: inherit;
}
.form-input:focus { border-color: var(--accent); }
.form-input:disabled { opacity: 0.6; }

.btn {
  width: 100%; padding: 14px; border-radius: 8px; border: none;
  background: var(--accent); color: white;
  font-size: 16px; font-weight: bold; cursor: pointer;
  margin-top: 8px;
}
.btn:active { opacity: 0.9; }
.btn:disabled { opacity: 0.5; }
.btn.btn-outline { background: transparent; color: var(--error); border: 1px solid var(--border); }

.btn-link {
  background: none; border: none; color: var(--accent);
  font-size: 14px; font-weight: 600; cursor: pointer; padding: 6px;
}
.btn-link-close {
  background: none; border: none; color: var(--text-sec);
  font-size: 22px; cursor: pointer; padding: 0 8px;
}

.footer-text { color: rgba(255,255,255,0.5); font-size: 11px; margin-top: 24px; text-align: center; }

.error-box {
  background: #FFEBEE; color: var(--error); border-radius: 6px;
  padding: 10px; font-size: 13px; margin-top: 8px;
}

.field-label { font-size: 12px; color: var(--text-sec); display: block; margin-top: 12px; margin-bottom: 4px; }

/* ========== HEADERS ========== */
.header {
  background: var(--primary-dark);
  padding: env(safe-area-inset-top) 16px 12px;
  padding-top: max(env(safe-area-inset-top), 36px);
}
.header-row { display: flex; align-items: center; justify-content: space-between; padding: 4px 0 8px; }
.header h1 { color: white; font-size: 22px; flex: 1; }
.header small { color: rgba(255,255,255,0.6); font-size: 12px; display: block; padding: 4px 0 0; }
.header-actions { display: flex; gap: 6px; }
.icon-btn {
  background: rgba(255,255,255,0.1); color: white; border: none;
  width: 36px; height: 36px; border-radius: 50%; font-size: 16px;
  cursor: pointer;
}
.search-bar {
  width: 100%; background: rgba(255,255,255,0.15);
  border: none; color: white; padding: 10px 14px;
  border-radius: 20px; font-size: 13px; margin-top: 4px;
  outline: none;
}
.search-bar::placeholder { color: rgba(255,255,255,0.6); }
.back-btn { color: white; font-size: 22px; margin-right: 10px; cursor: pointer; background: none; border: none; }

/* ========== CHAT LIST ========== */
.contact-list { flex: 1; overflow-y: auto; background: white; }
.contact-item {
  display: flex; align-items: center; padding: 12px 16px;
  background: white; border-bottom: 1px solid var(--border);
  cursor: pointer; position: relative;
}
.contact-item:active { background: #f0f0f0; }
.contact-item.pinned { background: #FFF8E1; }
.contact-item .pin-icon { position: absolute; top: 10px; right: 14px; font-size: 11px; color: var(--accent); }

.avatar {
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin-right: 12px; position: relative; flex-shrink: 0;
  overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar span { color: white; font-size: 20px; font-weight: bold; }
.avatar.small { width: 36px; height: 36px; }
.avatar.small span { font-size: 14px; }
.avatar.xl { width: 110px; height: 110px; }
.avatar.xl span { font-size: 42px; }

.status-dot {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid white; position: absolute;
  bottom: -1px; right: -1px;
}
.status-dot.online { background: var(--online); }
.status-dot.offline { background: var(--offline); }

.contact-info { flex: 1; min-width: 0; }
.contact-name { font-size: 15px; font-weight: 600; color: var(--text); }
.contact-preview { font-size: 13px; color: var(--text-sec); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.contact-time { font-size: 11px; color: var(--text-sec); margin-left: 6px; }
.unread-badge {
  background: var(--accent); color: white;
  min-width: 20px; height: 20px; padding: 0 6px;
  border-radius: 10px; font-size: 11px; font-weight: bold;
  display: flex; align-items: center; justify-content: center;
  margin-left: 6px;
}

.push-prompt {
  display: flex; align-items: center; gap: 8px;
  background: #E3F2FD; border-top: 1px solid #BBDEFB;
  padding: 10px 16px; font-size: 13px;
}
.push-prompt span { flex: 1; }

/* ========== CHAT SCREEN ========== */
#chatScreen { background: var(--chat-bg); }

.chat-header {
  background: var(--primary-dark);
  padding: max(env(safe-area-inset-top), 36px) 12px 12px;
  display: flex; align-items: center;
}
.chat-header .avatar { margin-right: 8px; }
.chat-header-info { flex: 1; min-width: 0; }
.chat-header-name { color: white; font-size: 16px; font-weight: bold; }
.chat-header-status { color: var(--accent-light); font-size: 12px; }
.call-btns { display: flex; gap: 6px; }
.call-btn { background: none; border: none; font-size: 20px; cursor: pointer; padding: 6px; color: white; }

.messages { flex: 1; overflow-y: auto; padding: 12px 10px; }
.msg-group { margin-bottom: 6px; }
.message {
  max-width: 78%; padding: 8px 12px; border-radius: 14px;
  margin-bottom: 3px; position: relative;
  word-wrap: break-word; overflow-wrap: break-word;
}
.message.sent {
  background: var(--bubble-sent); color: white;
  margin-left: auto; border-bottom-right-radius: 4px;
}
.message.received {
  background: var(--bubble-recv); color: var(--text);
  border: 1px solid var(--border); border-bottom-left-radius: 4px;
}
.message .text { font-size: 14px; line-height: 1.35; white-space: pre-wrap; }
.message .meta {
  font-size: 10px; text-align: right; margin-top: 3px;
  opacity: 0.7; display: flex; justify-content: flex-end; align-items: center; gap: 4px;
}
.message.sent .meta { color: rgba(255,255,255,0.8); }
.ticks { font-size: 11px; letter-spacing: -2px; }
.ticks.read { color: var(--tick); }

.msg-sender-name { font-size: 11px; color: var(--accent); margin-bottom: 2px; font-weight: 600; }

.reply-preview {
  background: rgba(0,0,0,0.08); border-left: 3px solid var(--accent);
  padding: 4px 8px; border-radius: 4px; margin-bottom: 4px;
  font-size: 12px; opacity: 0.85;
}
.message.sent .reply-preview { background: rgba(255,255,255,0.15); }

.reactions-row {
  display: flex; gap: 2px; margin-top: 3px;
  position: absolute; bottom: -10px; right: 8px;
  background: white; border-radius: 12px;
  padding: 2px 6px; box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  font-size: 12px;
}

.message.media img, .message.media video {
  max-width: 100%; max-height: 280px; border-radius: 8px;
  display: block;
}
.voice-msg { display: flex; align-items: center; gap: 8px; font-size: 13px; }

.typing-indicator {
  padding: 6px 12px; font-size: 12px; color: var(--text-sec); font-style: italic;
}

.reply-bar {
  display: flex; align-items: center; background: #BBDEFB;
  padding: 8px 12px; border-top: 1px solid #90CAF9;
}
.reply-text { flex: 1; font-size: 13px; color: var(--primary-dark); }
.reply-cancel { background: none; border: none; font-size: 20px; color: var(--text-sec); cursor: pointer; }

.input-bar {
  display: flex; align-items: center; padding: 8px;
  background: white; border-top: 1px solid var(--border);
  padding-bottom: max(8px, env(safe-area-inset-bottom));
}
.mic-btn, .attach-btn {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--bg); border: none; font-size: 18px;
  cursor: pointer; margin-right: 6px; flex-shrink: 0;
}
.mic-btn.recording { background: var(--error); color: white; }
.msg-input {
  flex: 1; padding: 10px 16px; border-radius: 20px;
  border: none; background: var(--bg); font-size: 14px; outline: none;
  font-family: inherit;
}
.send-btn {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent); border: none; color: white;
  font-size: 18px; cursor: pointer; margin-left: 6px; flex-shrink: 0;
}

/* ========== CALL SCREEN ========== */
#callScreen {
  background: var(--primary-dark);
  justify-content: space-between; align-items: center;
  padding: 80px 24px 50px;
  position: relative;
}
.call-contact { font-size: 26px; font-weight: bold; color: white; text-align: center; }
.call-status { font-size: 15px; color: var(--accent-light); margin-top: 6px; text-align: center; }
.call-avatar-lg {
  width: 110px; height: 110px; border-radius: 60px;
  background: var(--primary); display: flex; align-items: center;
  justify-content: center; margin: 32px 0;
  overflow: hidden;
}
.call-avatar-lg img { width: 100%; height: 100%; object-fit: cover; }
.call-avatar-lg span { font-size: 46px; color: white; font-weight: bold; }
.call-timer { font-size: 22px; color: white; font-family: monospace; }
.call-controls { display: flex; gap: 24px; }
.ctrl-btn {
  width: 60px; height: 60px; border-radius: 50%;
  background: rgba(255,255,255,0.2); border: none;
  font-size: 22px; cursor: pointer; color: white;
}
.ctrl-btn.end { background: var(--error); width: 68px; height: 68px; }
.ctrl-btn.answer { background: var(--success); }
.call-video {
  position: absolute; border-radius: 8px;
  background: #000;
}
.call-video.remote { top: 0; left: 0; width: 100%; height: 100%; border-radius: 0; z-index: 0; }
.call-video:not(.remote) { bottom: 150px; right: 16px; width: 110px; height: 150px; z-index: 1; border: 2px solid white; }

/* ========== INCOMING CALL MODAL ========== */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6); display: flex;
  align-items: flex-end; justify-content: center; z-index: 100;
}
.modal { background: white; border-radius: 16px 16px 0 0; width: 100%; max-width: 430px; padding: 20px; }
.modal.incoming-call {
  background: var(--primary-dark); color: white;
  border-radius: 16px; margin: auto 16px; padding: 40px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}

.bottom-sheet { padding: 12px 0; }
.sheet-item {
  display: block; width: 100%; text-align: left;
  background: none; border: none; padding: 14px 20px;
  font-size: 15px; cursor: pointer; font-family: inherit;
}
.sheet-item:hover { background: var(--bg); }
.reaction-row {
  display: flex; justify-content: space-around;
  padding: 12px 0; border-bottom: 1px solid var(--border);
}
.reac-btn {
  background: var(--bg); border: none;
  width: 44px; height: 44px; border-radius: 50%;
  font-size: 22px; cursor: pointer;
}
.reac-btn:active { transform: scale(1.2); }

/* ========== PROFILE ========== */
.profile-body {
  flex: 1; padding: 16px; overflow-y: auto; background: var(--bg);
}
.avatar-editor {
  display: flex; flex-direction: column; align-items: center;
  padding: 16px 0 24px;
}
.avatar-editor .avatar { margin-bottom: 10px; background: var(--primary); }

/* ========== INVITES ========== */
.invites-body { flex: 1; padding: 16px; overflow-y: auto; background: var(--bg); }
.hint { color: var(--text-sec); font-size: 13px; margin-bottom: 12px; }
.invites-list { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.invite-item {
  background: white; border-radius: 8px; padding: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  display: flex; justify-content: space-between; align-items: center;
}
.invite-code { font-family: monospace; font-weight: 700; font-size: 14px; color: var(--primary-dark); }
.invite-meta { font-size: 11px; color: var(--text-sec); margin-top: 2px; }
.invite-actions { display: flex; gap: 6px; }
.mini-btn {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 6px; font-size: 12px; cursor: pointer;
}
.mini-btn.danger { color: var(--error); border-color: #FFCDD2; }

.member-picker { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.member-item {
  background: white; padding: 10px 14px; border-radius: 8px;
  display: flex; align-items: center; cursor: pointer;
}
.member-item input { margin-right: 10px; }
.member-item.selected { background: #E3F2FD; }

/* ========== TOAST ========== */
.toast {
  position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%);
  background: var(--primary-dark); color: white;
  padding: 10px 18px; border-radius: 22px;
  font-size: 13px; z-index: 200;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  max-width: 86%; text-align: center;
}

/* ========== SEARCH RESULTS ========== */
.search-result {
  padding: 12px 16px; background: white;
  border-bottom: 1px solid var(--border); cursor: pointer;
}
.search-result-title { font-size: 14px; font-weight: 600; }
.search-result-snippet { font-size: 12px; color: var(--text-sec); margin-top: 2px; }
.search-result-snippet b { color: var(--accent); }