* { box-sizing: border-box; }

:root {
  --msn-blue: #0054e3;
  --msn-blue-dark: #0d47a3;
  --msn-blue-mid: #1a5cc8;
  --msn-blue-light: #4e97e8;
  --msn-red: #e2231a;
  --surface: #ffffff;
  --surface-alt: #f6f7fb;
  --border-soft: rgba(13, 71, 163, 0.12);
  --text-main: #1c2430;
  --text-muted: #6b7686;
  --status-online: #22c55e;
  --status-away: #f0ad2e;
  --status-busy: #ef4444;
  --status-offline: #9aa3b2;
  --radius-window: 18px;
  --radius-el: 10px;
  --shadow-window: 0 20px 60px -12px rgba(13, 40, 90, 0.35), 0 4px 16px rgba(13, 40, 90, 0.12);
}

* { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }

body {
  margin: 0;
  font-size: 13px;
  color: var(--text-main);
  min-height: 100vh;
  background: radial-gradient(circle at 20% 20%, #8fb4e8 0%, #4a6fa5 45%, #23407a 100%);
}

/* ---------- Window chrome (2026: glass + soft depth) ---------- */
.msn-window, .login-window {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-window);
  box-shadow: var(--shadow-window);
  overflow: hidden;
}

.titlebar {
  background: linear-gradient(135deg, var(--msn-blue-light) 0%, var(--msn-blue-mid) 55%, var(--msn-blue-dark) 100%);
  backdrop-filter: blur(6px);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.1px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: default;
}
.titlebar-btns { display: flex; gap: 6px; align-items: center; }
.tb-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.18);
  color: #fff;
  width: 22px;
  height: 22px;
  border-radius: 7px;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease;
}
.tb-btn:hover { background: rgba(255,255,255,0.32); }
.tb-btn.tb-close:hover { background: var(--msn-red); }
.tb-btn.tb-settings { font-size: 13px; }

.menubar {
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-soft);
  padding: 6px 10px;
  font-size: 11.5px;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
  position: relative;
}
.menu-item { cursor: pointer; padding: 2px 4px; border-radius: 6px; position: relative; }
.menu-item:hover { background: rgba(0,84,227,0.08); color: var(--msn-blue); }
.menu-dropdown {
  display: none;
  position: absolute;
  top: 26px;
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-el);
  box-shadow: 0 12px 30px rgba(13,40,90,0.2);
  min-width: 170px;
  padding: 4px;
  z-index: 50;
}
.menu-extra.open .menu-dropdown { display: block; }
.menu-dropdown-item {
  padding: 7px 10px;
  border-radius: 7px;
  font-size: 12px;
  color: var(--text-main);
  cursor: pointer;
  white-space: nowrap;
}
.menu-dropdown-item:hover { background: rgba(0,84,227,0.08); color: var(--msn-blue); }

/* ---------- Login screen ---------- */
.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}
.login-window { width: 340px; }
.login-body { padding: 26px 26px 18px; }
.login-logo { text-align: center; margin-bottom: 20px; }
.brand-mark {
  width: 56px; height: 56px;
  margin: 0 auto 10px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--msn-blue-light), var(--msn-blue-dark));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.5px;
  box-shadow: 0 10px 24px rgba(13,71,163,0.35);
}
.wordmark { font-size: 19px; font-weight: 800; letter-spacing: -0.2px; }
.msn-red { color: var(--msn-red); }
.msn-blue { color: var(--msn-blue); margin-left: 4px; }
.wordmark-sub { display: block; font-size: 11px; font-weight: 500; color: var(--text-muted); letter-spacing: 1.5px; text-transform: uppercase; margin-top: 2px; }

.field-row { margin-bottom: 13px; }
.field-row label { display: block; margin-bottom: 5px; color: var(--text-muted); font-size: 11.5px; font-weight: 600; }
.field-row input[type="email"], .field-row input[type="password"], .field-row input[type="text"] {
  width: 100%;
  padding: 9px 11px;
  border: 1.5px solid #dbe3f0;
  border-radius: var(--radius-el);
  font-size: 13px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  background: var(--surface-alt);
}
.field-row input:focus {
  outline: none;
  border-color: var(--msn-blue);
  box-shadow: 0 0 0 3px rgba(0,84,227,0.12);
  background: #fff;
}
.checkbox-row label { display: flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 500; color: var(--text-muted); }
.checkbox-row input { margin: 0; }

.btn-row { text-align: center; margin: 14px 0 8px; }
.msn-btn {
  background: linear-gradient(135deg, var(--msn-blue-light), var(--msn-blue-dark));
  border: none;
  border-radius: var(--radius-el);
  padding: 9px 26px;
  font-size: 12.5px;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(13,71,163,0.3);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.msn-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(13,71,163,0.38); }
.msn-btn:active { transform: translateY(0); }
.msn-btn.small { padding: 6px 14px; font-weight: 600; box-shadow: none; }

.switch-link { text-align: center; font-size: 11.5px; color: var(--text-muted); }
.switch-link a { color: var(--msn-blue); cursor: pointer; font-weight: 600; }
.error-msg { color: var(--msn-red); font-size: 11.5px; min-height: 14px; text-align: center; margin: 4px 0; }
.login-footer {
  background: var(--surface-alt);
  font-size: 10.5px;
  color: var(--text-muted);
  padding: 8px 12px;
  border-top: 1px solid var(--border-soft);
  text-align: center;
}

/* ---------- Contact list window ---------- */
.contact-window {
  width: 270px;
  height: 620px;
  position: fixed;
  top: 30px;
  left: 30px;
  display: flex;
  flex-direction: column;
  resize: both;
  overflow: auto;
  min-width: 240px;
  min-height: 340px;
}
.me-panel {
  display: flex;
  gap: 10px;
  padding: 12px;
  align-items: center;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-soft);
}
.avatar-wrap { position: relative; flex-shrink: 0; }
.me-avatar, .contact-item .c-avatar, .chat-header .avatar {
  width: 38px; height: 38px;
  background: #fff;
  border: 1.5px solid var(--border-soft);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px;
}
.status-badge {
  position: absolute;
  bottom: -2px; right: -2px;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2.5px solid #fff;
  background: var(--status-offline);
}
.status-badge.status-online { background: var(--status-online); box-shadow: 0 0 0 0 rgba(34,197,94,0.5); animation: pulse-online 2.2s ease-out infinite; }
.status-badge.status-away { background: var(--status-away); }
.status-badge.status-busy { background: var(--status-busy); }
.status-badge.status-offline, .status-badge.status-invisible { background: var(--status-offline); }

@keyframes pulse-online {
  0% { box-shadow: 0 0 0 0 rgba(34,197,94,0.45); }
  70% { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,197,94,0); }
}

.me-info { flex: 1; min-width: 0; }
.me-name { font-weight: 700; color: var(--text-main); font-size: 13px; margin-bottom: 3px; }
.me-info select {
  font-size: 11px;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  width: 100%;
  margin-bottom: 3px;
  padding: 2px 4px;
  background: #fff;
  color: var(--text-main);
}
.status-msg-input {
  width: 100%;
  font-size: 11px;
  font-style: italic;
  border: none;
  background: transparent;
  padding: 1px 0;
  color: var(--text-muted);
}
.status-msg-input:focus { outline: none; color: var(--text-main); }

.icon-btn {
  background: transparent;
  border: none;
  font-size: 15px;
  cursor: pointer;
  color: var(--text-muted);
  width: 28px; height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
}
.icon-btn:hover { background: rgba(0,84,227,0.1); color: var(--msn-blue); }

.add-contact-row {
  display: flex;
  gap: 6px;
  padding: 8px 10px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-soft);
}
.add-contact-row input {
  flex: 1;
  font-size: 11.5px;
  padding: 6px 8px;
  border: 1.5px solid #dbe3f0;
  border-radius: 8px;
  background: #fff;
}
.add-contact-row input:focus { outline: none; border-color: var(--msn-blue); }

.group-header {
  background: transparent;
  color: var(--text-muted);
  font-weight: 700;
  font-size: 10.5px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 10px 12px 5px;
  cursor: pointer;
}

.contact-list { background: var(--surface); overflow-y: auto; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 12px;
  cursor: pointer;
  transition: background 0.12s ease;
  border-radius: 10px;
  margin: 0 6px 2px;
}
.contact-item:hover { background: rgba(0,84,227,0.07); }
.contact-item .c-avatar { width: 30px; height: 30px; font-size: 15px; border-radius: 10px; }
.contact-item .cname { font-weight: 600; color: var(--text-main); font-size: 12.5px; display: block; }
.contact-item.offline .cname { color: var(--text-muted); font-weight: 500; }
.contact-item .cstatus { font-size: 10.5px; color: var(--text-muted); display: block; }

.pending-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background: #fff8e6;
  border-radius: 10px;
  margin: 0 6px 4px;
  font-size: 11.5px;
}

.main-footer {
  padding: 8px 10px;
  text-align: right;
  background: var(--surface-alt);
  border-top: 1px solid var(--border-soft);
}

.resize-grip {
  position: absolute;
  bottom: 3px; right: 3px;
  width: 10px; height: 10px;
  pointer-events: none;
  background:
    linear-gradient(135deg, transparent 0 40%, var(--border-soft) 40% 46%, transparent 46% 56%, var(--border-soft) 56% 62%, transparent 62%);
  opacity: 0.8;
}

/* ---------- Chat window ---------- */
.chat-window {
  width: 380px;
  height: 460px;
  position: fixed;
  display: flex;
  flex-direction: column;
  resize: both;
  overflow: auto;
  min-width: 300px;
  min-height: 320px;
}
.chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-soft);
}
.chat-header .avatar { width: 34px; height: 34px; font-size: 17px; }
.chat-header .cname { font-weight: 700; color: var(--text-main); font-size: 13px; }
.chat-header .cstatus-msg { font-size: 10.5px; color: var(--text-muted); font-style: italic; }

.chat-log {
  flex: 1;
  background: var(--surface);
  overflow-y: auto;
  padding: 10px 12px;
  font-size: 12.5px;
}
.msg-line { margin-bottom: 10px; }
.msg-meta { font-size: 10px; color: var(--text-muted); margin-bottom: 2px; font-weight: 600; }
.msg-meta .who { font-weight: 700; }
.msg-meta.me .who { color: var(--msn-blue); }
.msg-meta.them .who { color: var(--msn-red); }
.msg-text {
  color: var(--text-main);
  word-wrap: break-word;
  background: var(--surface-alt);
  display: inline-block;
  padding: 6px 10px;
  border-radius: 10px;
  max-width: 85%;
}
.msg-nudge {
  text-align: center;
  color: var(--msn-red);
  font-style: italic;
  font-size: 11px;
  font-weight: 600;
  margin: 8px 0;
}
.typing-indicator { font-size: 10.5px; color: var(--text-muted); font-style: italic; padding: 3px 12px; height: 16px; }

.chat-toolbar {
  display: flex;
  gap: 4px;
  padding: 6px 10px;
  background: var(--surface-alt);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  flex-wrap: wrap;
}
.chat-toolbar button {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  font-size: 12px;
  padding: 4px 9px;
  cursor: pointer;
  transition: background 0.12s ease;
}
.chat-toolbar button:hover { background: rgba(0,84,227,0.08); }

.chat-input-area {
  display: flex;
  flex-direction: column;
  height: 90px;
  border-top: 1px solid var(--border-soft);
}
.chat-input-area textarea {
  flex: 1;
  border: none;
  resize: none;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 12.5px;
  outline: none;
}
.chat-send-row {
  display: flex;
  justify-content: flex-end;
  padding: 6px 10px;
  background: var(--surface-alt);
}

@keyframes shake {
  0%,100% { transform: translate(0,0); }
  10% { transform: translate(-6px,-4px); }
  20% { transform: translate(6px,4px); }
  30% { transform: translate(-6px,4px); }
  40% { transform: translate(6px,-4px); }
  50% { transform: translate(-4px,0); }
  60% { transform: translate(4px,0); }
  70% { transform: translate(-3px,3px); }
  80% { transform: translate(3px,-3px); }
  90% { transform: translate(-2px,0); }
}
.shake { animation: shake 0.5s ease-in-out 2; }

/* ---------- Settings modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 25, 55, 0.45);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.settings-window { width: 340px; }
.settings-body { padding: 18px 20px; }
.settings-section { margin-bottom: 14px; }
.settings-section > label { display: block; margin-bottom: 6px; color: var(--text-muted); font-size: 11.5px; font-weight: 600; }
.settings-section input[type="text"] {
  width: 100%;
  padding: 8px 10px;
  border: 1.5px solid #dbe3f0;
  border-radius: var(--radius-el);
  font-size: 13px;
  background: var(--surface-alt);
}
.settings-section input[type="text"]:focus { outline: none; border-color: var(--msn-blue); background: #fff; }
.avatar-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.avatar-choice {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 10px;
  border: 1.5px solid var(--border-soft);
  background: var(--surface-alt);
  font-size: 17px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.12s ease;
}
.avatar-choice:hover { background: rgba(0,84,227,0.08); }
.avatar-choice.selected { border-color: var(--msn-blue); background: rgba(0,84,227,0.12); box-shadow: 0 0 0 2px rgba(0,84,227,0.18); }
.settings-btn-row { display: flex; justify-content: flex-end; gap: 8px; }