/* SecuroChat - iPhone-like SMS UI, responsive full-width */
:root{
  --bg:#0f1115;
  --panel:#161a22;
  --text:#e5e7eb;
  --muted:#9aa0aa;
  --blue:#0a84ff; /* iMessage blue */
  --gray:#e5e5ea; /* iMessage gray bubble */
  --danger:#ff4d4f;
}

*{box-sizing:border-box}
html,body,#app{height:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
}

/* Views */
.view{display:flex;align-items:center;justify-content:center;height:100%;width:100%}
.hidden{display:none !important}

.auth-card{
  width:min(640px,94vw);
  background:var(--panel);
  padding:28px;
  border-radius:18px;
  box-shadow:0 10px 32px rgba(0,0,0,.45);
}
.auth-card h1{margin:0 0 12px 0}
.tabs{display:flex;gap:8px;margin:12px 0 16px}
.tab{flex:1;padding:10px 12px;border-radius:10px;border:1px solid #2a3140;background:#1b2130;color:var(--text);cursor:pointer}
.tab.active{background:#20293a;border-color:#39425a}
.tab-content label{display:block;margin:8px 0 4px;color:var(--muted);font-size:14px}
.tab-content input{width:100%;padding:12px 12px;border-radius:12px;border:1px solid #2b3242;background:#111523;color:var(--text)}
.tab-content button{margin-top:14px;width:100%;padding:12px;border-radius:12px;border:0;background:var(--blue);color:white;font-weight:600;cursor:pointer}
.hint{opacity:.7;margin-top:10px;font-size:12px}
.error{margin-top:10px;color:var(--danger)}

/* Chat layout */
.topbar{
  position:sticky;top:0;
  display:flex;align-items:center;justify-content:space-between;
  width:100%;padding:10px 14px;background:#0c0f14;border-bottom:1px solid #1d2433
z-index:5;}
.brand{font-weight:700}
.actions button{margin-left:8px;padding:8px 12px;border-radius:10px;border:1px solid #2b3242;background:#141a26;color:var(--text);cursor:pointer}
.layout{display:grid;grid-template-columns:300px 1fr;height:calc(100vh - 52px);width:100%}
.sidebar{border-right:1px solid #1d2433;background:#0f131c;display:flex;flex-direction:column}
.add-friend{display:flex;gap:8px;padding:10px;border-bottom:1px solid #1d2433}
.add-friend input{flex:1;padding:10px;border-radius:10px;border:1px solid #2b3242;background:#111523;color:var(--text)}
.add-friend button{padding:10px 12px;border-radius:10px;border:1px solid #2b3242;background:#141a26;color:var(--text);cursor:pointer}
.friends{list-style:none;margin:0;padding:0;overflow:auto;flex:1}
.friends li{display:flex;align-items:center;gap:10px;padding:12px;border-bottom:1px solid #141a26;cursor:pointer}
.friends li.active{background:#151b28}
.friends .avatar{width:32px;height:32px;border-radius:50%;background:#20283a;display:flex;align-items:center;justify-content:center;font-weight:700}
.friends .name{font-weight:600}

.chat{display:flex;flex-direction:column;height:100%;width:100%}
.chat-header{padding:10px 14px;border-bottom:1px solid #1d2433;background:#0f131c}
.messages{flex:1;padding:16px;overflow:auto;background:#0a0e14}
.composer{display:flex;gap:8px;padding:10px;border-top:1px solid #1d2433;background:#0f131c}
.composer input[type="text"]{flex:1;padding:12px;border-radius:20px;border:1px solid #2b3242;background:#111523;color:var(--text)}
.composer button{padding:10px 12px;border-radius:14px;border:1px solid #2b3242;background:#141a26;color:var(--text);cursor:pointer}

/* iMessage-like bubbles */
.bubble{max-width:76%;padding:10px 14px;border-radius:20px;margin:2px 0;word-wrap:break-word;display:inline-block;position:relative}
.mine{background:var(--blue);color:white;align-self:flex-end;border-bottom-right-radius:4px}
.their{background:var(--gray);color:black;align-self:flex-start;border-bottom-left-radius:4px}
.row{display:flex;width:100%}
.row.mine{justify-content:flex-end}
.row.their{justify-content:flex-start}
img.msg-image{max-width:56vw;max-height:56vh;border-radius:16px;display:block}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:10000}
.modal-content{width:min(640px,94vw);background:#161a22;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.4);position:relative;z-index:10001}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #20283a}
.modal-body{padding:10px 16px}
.modal.hidden{display:none}

/* Responsive: full-width on small screens */
@media (max-width: 960px){
  .layout{grid-template-columns:1fr}
  .sidebar{display:none}
  .layout.show-sidebar .sidebar{display:flex;position:absolute;z-index:20;width:80%;height:calc(100% - 52px)}
}


/* Layout robustness */
.layout, .sidebar, .chat, .messages, .composer { min-width: 0; }
.chat { display:flex; flex-direction:column; }
.messages { overflow:auto; }
@media (max-width: 960px){
  body, html, #app { height:auto; }
  .layout{ grid-template-columns: 1fr; height:auto; }
  .chat{ height: calc(100vh - 52px); }
}


/* Hamburger for small screens */
.hamburger{display:none;margin-left:8px;padding:8px 12px;border-radius:10px;border:1px solid #2b3242;background:#141a26;color:var(--text);cursor:pointer}
.hamburger-menu{position:absolute;right:12px;top:52px;background:#161a22;border:1px solid #20283a;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.4);padding:8px;display:flex;flex-direction:column;gap:8px;z-index:10002}
.hamburger-menu button{width:100%;padding:10px 12px;border-radius:10px;border:1px solid #2b3242;background:#141a26;color:var(--text);text-align:left;}

/* Small screens: hide desktop actions, show hamburger */
@media (max-width: 960px){
  .actions button#requestsBtn,
  .actions button#logoutBtn{ display:none; }
  .actions .hamburger{ display:inline-block; }
}


/* Ensure chat view is not centered like auth view */
#chatView.view{
  align-items: stretch;
  justify-content: flex-start;
  flex-direction: column;
}


/* Mobile sidebar toggle and backdrop */
.sidebar-btn{display:none;margin-right:8px;padding:8px 10px;border-radius:10px;border:1px solid #2b3242;background:#141a26;color:var(--text);cursor:pointer}
.sidebar-backdrop{position:fixed;left:0;right:0;top:52px;bottom:0;background:rgba(0,0,0,.4);z-index:18}
@media (max-width: 960px){
  .sidebar-btn{display:inline-block}
  .layout.show-sidebar .sidebar{display:flex;position:absolute;z-index:20;width:80%;max-width:360px;height:calc(100% - 52px)}
  .layout.show-sidebar ~ .sidebar-backdrop{display:block}
}

/* Unread badge */
.friends .name{display:flex;align-items:center;gap:8px}
.badge{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--blue);color:white;font-size:12px;font-weight:700}

/* Modal textareas for key import/export */
.modal textarea{
  width:100%;
  min-height:160px;
  background:#0f131c;
  color:var(--text);
  border:1px solid #2b3242;
  border-radius:12px;
  padding:10px;
  resize:vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
}