/* ═══════════════════════════════════════════════════════════
   WhatsApp Clone - CSS
   ═══════════════════════════════════════════════════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --wa-green:#25d366;--wa-dark-green:#075e54;--wa-light-green:#dcf8c6;
  --wa-teal:#128c7e;--wa-bg:#f0f2f5;--wa-panel:#ffffff;
  --wa-msg-out:#dcf8c6;--wa-msg-in:#ffffff;
  --wa-text:#111b21;--wa-text2:#667781;--wa-border:#e9edef;
  --wa-blue:#53bdeb;--wa-red:#f15c6d;
}
html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--wa-bg);color:var(--wa-text);overflow:hidden}

/* ── Screens ───────────────────────────────────────────────── */
.screen{display:none;width:100vw;height:100vh}
.screen.active{display:flex;align-items:center;justify-content:center}

/* ── Auth ──────────────────────────────────────────────────── */
.auth-container{background:var(--wa-panel);border-radius:16px;padding:40px 32px;width:100%;max-width:400px;box-shadow:0 4px 40px rgba(0,0,0,.15);text-align:center}
.auth-logo{background:var(--wa-dark-green);border-radius:50%;width:100px;height:100px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.auth-container h1{font-size:28px;color:var(--wa-dark-green);margin-bottom:4px}
.auth-subtitle{color:var(--wa-text2);margin-bottom:20px;font-size:14px}
.auth-tabs{display:flex;border-radius:8px;overflow:hidden;margin-bottom:20px;border:1px solid var(--wa-border)}
.tab-btn{flex:1;padding:10px;border:none;background:#fff;cursor:pointer;font-size:14px;transition:.2s}
.tab-btn.active{background:var(--wa-dark-green);color:#fff}
.auth-form{display:none;flex-direction:column;gap:12px}
.auth-form.active{display:flex}
.auth-form input{padding:12px 16px;border:1px solid var(--wa-border);border-radius:8px;font-size:14px;outline:none;transition:.2s}
.auth-form input:focus{border-color:var(--wa-teal)}
.btn-primary{padding:12px;background:var(--wa-dark-green);color:#fff;border:none;border-radius:8px;font-size:15px;cursor:pointer;transition:.2s}
.btn-primary:hover{background:var(--wa-teal)}
.error-msg{color:var(--wa-red);font-size:13px;min-height:20px}

/* ── App Layout ────────────────────────────────────────────── */
#app-screen{align-items:stretch;justify-content:flex-start}
.app-layout{display:flex;width:100%;height:100%;max-width:1920px}

/* ── Sidebar ───────────────────────────────────────────────── */
.sidebar{width:360px;min-width:280px;background:var(--wa-panel);border-right:1px solid var(--wa-border);display:flex;flex-direction:column;flex-shrink:0}
.sidebar-header{background:var(--wa-bg);padding:10px 16px;display:flex;align-items:center;justify-content:space-between;min-height:59px}
.sidebar-actions{display:flex;gap:8px;align-items:center}
.icon-btn{background:none;border:none;cursor:pointer;color:var(--wa-text2);padding:6px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:.2s}
.icon-btn:hover{background:var(--wa-border)}
.search-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--wa-bg);border-bottom:1px solid var(--wa-border)}
.search-bar input{flex:1;border:none;background:#fff;border-radius:8px;padding:8px 12px;font-size:14px;outline:none}

/* ── Chat List ─────────────────────────────────────────────── */
.chat-list{flex:1;overflow-y:auto}
.chat-item{display:flex;align-items:center;padding:10px 16px;cursor:pointer;border-bottom:1px solid var(--wa-border);transition:.15s;gap:12px}
.chat-item:hover,.chat-item.active{background:#f5f6f6}
.chat-info{flex:1;min-width:0}
.chat-item-name{font-size:16px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item-last{font-size:13px;color:var(--wa-text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.chat-item-meta{text-align:right;display:flex;flex-direction:column;gap:4px;align-items:flex-end}
.chat-item-time{font-size:11px;color:var(--wa-text2)}
.unread-badge{background:var(--wa-green);color:#fff;border-radius:50%;min-width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;padding:0 4px}

/* ── Avatars ───────────────────────────────────────────────── */
.avatar-sm{width:40px;height:40px;border-radius:50%;object-fit:cover}
.avatar-md{width:42px;height:42px;border-radius:50%;object-fit:cover}
.avatar-lg{width:54px;height:54px;border-radius:50%;object-fit:cover}
.avatar-xl{width:96px;height:96px;border-radius:50%;object-fit:cover;margin:0 auto 12px;display:block}
.clickable{cursor:pointer}

/* ── Chat Area ─────────────────────────────────────────────── */
.chat-area{flex:1;display:flex;flex-direction:column;background:var(--wa-bg)}
.chat-welcome{flex:1;display:flex;align-items:center;justify-content:center}
.welcome-content{text-align:center;color:var(--wa-text2)}
.welcome-content h2{font-size:26px;font-weight:300;margin:16px 0 8px;color:var(--wa-text)}
.welcome-content p{font-size:14px;line-height:1.6}
.chat-view{flex:1;display:flex;flex-direction:column;height:100%}

/* ── Chat Header ───────────────────────────────────────────── */
.chat-header{background:var(--wa-bg);padding:10px 16px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--wa-border);min-height:59px}
.chat-header-info{flex:1;min-width:0}
.chat-header-name{font-size:16px;font-weight:500;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-header-status{font-size:13px;color:var(--wa-text2);display:block}
.chat-header-actions{display:flex;gap:4px}
.back-btn{display:none}

/* ── Messages ──────────────────────────────────────────────── */
.messages-container{flex:1;overflow-y:auto;padding:16px;background:#e5ddd5;nter/cover}
#messages-list{display:flex;flex-direction:column;gap:2px}
.message{max-width:65%;padding:7px 12px 5px;border-radius:8px;line-height:1.4;position:relative;word-wrap:break-word}
.message.out{background:var(--wa-msg-out);align-self:flex-end;border-radius:8px 0 8px 8px}
.message.in{background:var(--wa-msg-in);align-self:flex-start;border-radius:0 8px 8px 8px;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.message .sender-name{font-size:12px;font-weight:600;color:var(--wa-teal);margin-bottom:3px}
.message .msg-text{font-size:14.5px}
.message .msg-time{font-size:11px;color:var(--wa-text2);text-align:right;margin-top:2px}
.message.out .msg-time::after{content:' ✓✓';color:var(--wa-blue)}
.message .msg-image{max-width:280px;max-height:220px;border-radius:6px;cursor:pointer;object-fit:cover}
.message .msg-audio audio{width:180px}
.message .msg-video video{max-width:280px;border-radius:6px}
.message .msg-file{display:flex;align-items:center;gap:8px;background:rgba(0,0,0,.05);padding:8px;border-radius:6px;cursor:pointer}
.message.deleted .msg-text{color:var(--wa-text2);font-style:italic}
.message .reply-bubble{background:rgba(0,0,0,.05);border-left:3px solid var(--wa-teal);padding:4px 8px;border-radius:4px;margin-bottom:4px;font-size:12px}
.date-divider{text-align:center;margin:12px 0}
.date-divider span{background:#e1f3fb;color:var(--wa-text2);padding:4px 12px;border-radius:8px;font-size:12px}

/* ── Typing indicator ──────────────────────────────────────── */
.typing-indicator{background:#fff;border-radius:0 8px 8px 8px;padding:10px 14px;align-self:flex-start;display:flex;gap:4px;align-items:center;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.typing-indicator span{width:8px;height:8px;background:var(--wa-text2);border-radius:50%;animation:bounce 1.4s infinite ease-in-out}
.typing-indicator span:nth-child(1){animation-delay:-0.32s}
.typing-indicator span:nth-child(2){animation-delay:-0.16s}
@keyframes bounce{0%,80%,100%{transform:scale(0)}40%{transform:scale(1)}}

/* ── Reply Preview ─────────────────────────────────────────── */
.reply-preview{background:#f0f2f5;padding:8px 16px;border-left:4px solid var(--wa-teal);display:flex;align-items:center;justify-content:space-between}
.reply-preview .reply-name{font-size:13px;font-weight:600;color:var(--wa-teal);display:block}
.reply-preview .reply-text{font-size:13px;color:var(--wa-text2);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:300px}
#cancel-reply{background:none;border:none;cursor:pointer;font-size:18px;color:var(--wa-text2)}

/* ── Input Area ────────────────────────────────────────────── */
.message-input-area{background:var(--wa-bg);padding:8px 12px;display:flex;align-items:flex-end;gap:8px;border-top:1px solid var(--wa-border)}
.input-wrapper{flex:1;background:#fff;border-radius:24px;display:flex;align-items:flex-end;padding:4px 12px;min-height:40px;max-height:120px}
.input-wrapper textarea{flex:1;border:none;outline:none;font-size:15px;resize:none;max-height:100px;line-height:1.4;padding:6px 0;background:transparent;font-family:inherit}
.send-btn{background:var(--wa-dark-green)!important;color:#fff!important;width:42px;height:42px;border-radius:50%}
.mic-btn svg{fill:#667781}
.recording .mic-btn svg{fill:var(--wa-red)}

/* ── Emoji Picker ──────────────────────────────────────────── */
.emoji-picker{position:absolute;bottom:80px;left:12px;background:#fff;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.15);padding:12px;display:grid;grid-template-columns:repeat(8,1fr);gap:6px;z-index:100;max-height:240px;overflow-y:auto;font-size:22px}
.emoji-picker button{background:none;border:none;cursor:pointer;padding:4px;border-radius:4px;transition:.1s}
.emoji-picker button:hover{background:var(--wa-border)}

/* ── Modals ────────────────────────────────────────────────── */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:200;display:none;align-items:center;justify-content:center}
.modal.open{display:flex}
.modal-content{background:#fff;border-radius:12px;width:100%;max-width:420px;max-height:80vh;display:flex;flex-direction:column;overflow:hidden}
.modal-header{background:var(--wa-dark-green);color:#fff;padding:16px;display:flex;align-items:center;gap:12px}
.modal-header h3{font-size:18px;font-weight:500}
.modal-back{background:none;border:none;color:#fff;font-size:20px;cursor:pointer}
.modal-search{padding:12px}
.modal-search input{width:100%;padding:10px 14px;border:1px solid var(--wa-border);border-radius:24px;font-size:14px;outline:none}
.contact-list{flex:1;overflow-y:auto}
.contact-item{display:flex;align-items:center;gap:12px;padding:12px 16px;cursor:pointer;transition:.15s}
.contact-item:hover{background:#f5f6f6}
.contact-info .name{font-size:15px;font-weight:500}
.contact-info .info{font-size:13px;color:var(--wa-text2)}
.fab-btn{margin:12px;background:var(--wa-dark-green);color:#fff;border:none;padding:10px 20px;border-radius:24px;cursor:pointer;font-size:14px}

/* ── Profile ───────────────────────────────────────────────── */
.profile-body{padding:20px;display:flex;flex-direction:column;align-items:center;gap:16px}
.profile-avatar-wrap{position:relative}
.avatar-edit-btn{position:absolute;bottom:0;right:0;background:var(--wa-teal);color:#fff;border:none;border-radius:50%;width:32px;height:32px;cursor:pointer;font-size:16px}
.profile-fields{width:100%;display:flex;flex-direction:column;gap:10px}
.profile-fields label{font-size:13px;color:var(--wa-teal);font-weight:600}
.profile-input{padding:10px 14px;border:none;border-bottom:2px solid var(--wa-border);outline:none;font-size:15px;width:100%;transition:.2s}
.profile-input:focus{border-bottom-color:var(--wa-teal)}

/* ── Call Screen ───────────────────────────────────────────── */
.call-overlay{width:100%;height:100%;display:flex;align-items:center;justify-content:center}
.call-container{background:linear-gradient(135deg,#075e54,#128c7e);border-radius:20px;padding:36px 24px;text-align:center;color:#fff;width:320px;position:relative}
.call-container h2{font-size:24px;margin-bottom:6px}
#call-status-text,#incoming-type-text{font-size:14px;opacity:.8;margin-bottom:20px}
#remote-video{width:100%;border-radius:12px;background:#000;display:none;margin-bottom:8px;max-height:200px;object-fit:cover}
#local-video{width:96px;height:130px;border-radius:8px;object-fit:cover;position:absolute;top:12px;right:12px;border:2px solid rgba(255,255,255,.3);display:none}
.call-controls,.incoming-btns{display:flex;justify-content:center;gap:20px;margin-top:20px}
.call-btn{width:56px;height:56px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer}
.end-btn{background:var(--wa-red)}
.accept-btn{background:var(--wa-green)}
.mute-btn,.cam-btn{background:rgba(255,255,255,.2)}
.mute-btn.active{background:rgba(255,255,255,.5)}

/* ── Online indicator ──────────────────────────────────────── */
.online-dot{display:inline-block;width:10px;height:10px;background:var(--wa-green);border-radius:50%;margin-left:4px}

/* ── Toast ─────────────────────────────────────────────────── */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:rgba(40,40,40,.9);color:#fff;padding:10px 20px;border-radius:8px;font-size:14px;z-index:999;opacity:0;transition:opacity .3s;pointer-events:none}
.toast.show{opacity:1}

/* ── Loading ───────────────────────────────────────────────── */
.loading-chats{padding:24px;text-align:center;color:var(--wa-text2);font-size:14px}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(0,0,0,.15);border-radius:3px}

/* ── Responsive ────────────────────────────────────────────── */
@media(max-width:768px){
  .sidebar{width:100%;position:absolute;z-index:10}
  .sidebar.hidden{display:none}
  .back-btn{display:flex!important}
  .chat-area{width:100%}
  .chat-welcome{display:flex}
}