*{box-sizing:border-box}
:root{--green:#00a884;--green-dark:#008069;--panel:#f0f2f5;--border:#e9edef;--muted:#667781;--chat:#efeae2;--text:#111b21}
html,body{width:100%;height:100%;margin:0}
body{font-family:"Segoe UI",Tahoma,Arial,sans-serif;background:#d1d7db;color:var(--text)}
button,input{font:inherit}
button{cursor:pointer}
#app{width:100%;min-height:100dvh}

/* Global page loading: only the centered modal, never in the header or buttons. */
.page-loader{position:fixed;inset:0;z-index:9999;display:grid;place-items:center;background:rgba(255,255,255,.58);backdrop-filter:blur(2px)}
.page-loader[hidden]{display:none}
.loader-modal{width:min(320px,calc(100vw - 40px));padding:28px 22px;border-radius:16px;background:#fff;box-shadow:0 12px 40px rgba(17,27,33,.18);text-align:center}
.loader-spinner{width:34px;height:34px;margin:0 auto 14px;border:3px solid #dfe5e8;border-top-color:var(--green);border-radius:50%;animation:spin .75s linear infinite}
.loader-title{font-size:15px;font-weight:600}
.loader-text{margin-top:5px;color:var(--muted);font-size:12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* Home */
.landing-page,.auth-page,.error-page{min-height:100dvh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#f7fafb,#e9f4f1)}
.landing-card,.auth-card,.error-card{width:min(760px,100%);background:#fff;border:1px solid #e1e7e9;border-radius:24px;box-shadow:0 18px 60px rgba(17,27,33,.10)}
.landing-card{padding:56px}
.brand-mark{width:62px;height:62px;border-radius:18px;background:var(--green);color:#fff;display:grid;place-items:center;font-size:28px;font-weight:800;margin-bottom:22px}
.brand-mark.small{width:46px;height:46px;border-radius:14px;font-size:20px;margin:0}
.eyebrow{display:inline-block;color:var(--green-dark);font-size:13px;font-weight:700;margin-bottom:10px}
.landing-card h1{margin:0;max-width:650px;font-size:clamp(32px,5vw,56px);line-height:1.12;letter-spacing:-1px}
.landing-card>p{max-width:620px;margin:18px 0 30px;color:var(--muted);font-size:16px;line-height:1.9}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:30px}
.feature-grid article{padding:18px;border:1px solid var(--border);border-radius:14px}
.feature-grid span{display:block;color:var(--green);font-size:22px;margin-bottom:10px}
.feature-grid strong{display:block;font-size:14px}
.feature-grid small{display:block;color:var(--muted);font-size:11px;line-height:1.6;margin-top:5px}
.primary-btn{width:100%;height:50px;border:0;border-radius:10px;background:var(--green);color:#fff;font-weight:700;transition:.15s ease}
.primary-btn:hover{background:var(--green-dark);transform:translateY(-1px)}

/* Login */
.auth-page{background:#f0f2f5}
.auth-card{width:min(440px,100%);padding:28px}
.back-link{border:0;background:transparent;color:var(--muted);padding:5px 0;margin-bottom:25px}
.auth-brand{display:flex;align-items:center;gap:12px;margin-bottom:28px}
.auth-brand strong,.auth-brand span{display:block}
.auth-brand strong{font-size:20px}
.auth-brand span{margin-top:4px;color:var(--muted);font-size:12px}
.auth-form{display:grid;gap:18px}
.auth-form label span{display:block;font-size:13px;font-weight:600;margin-bottom:7px}
.auth-form input{width:100%;height:48px;border:1px solid #d8dee2;border-radius:9px;padding:0 13px;outline:0;background:#fff}
.auth-form input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(0,168,132,.10)}
.form-error{padding:10px 12px;border-radius:8px;background:#fff1f0;color:#c0392b;font-size:12px}

/* Error */
.error-card{width:min(420px,100%);padding:30px;text-align:center}
.error-card strong{font-size:18px}
.error-card p{color:var(--muted);font-size:13px;line-height:1.8}

/* Chat - original structure retained and cleaned */
.chat-app{width:100%;height:100dvh;display:grid;grid-template-columns:72px clamp(330px,31vw,440px) minmax(0,1fr);direction:rtl;background:#fff;overflow:hidden}
.nav-rail{grid-column:1;grid-row:1;display:flex;flex-direction:column;justify-content:space-between;background:#f0f2f5;border-left:1px solid #d1d7db;padding:12px 8px;direction:rtl;z-index:5}
.rail-top,.rail-bottom{display:flex;flex-direction:column}
.nav-item{position:relative;width:56px;min-height:58px;margin:2px auto;border:0;border-radius:12px;background:transparent;color:#54656f;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:10px}
.nav-item:hover{background:#e2e6e8}.nav-item.active{background:#d9fdd3;color:#008069;font-weight:600}
.nav-icon{width:26px;height:24px;display:grid;place-items:center;font-size:20px;line-height:1}
.nav-badge{position:absolute;top:4px;right:3px;min-width:17px;height:17px;padding:0 4px;border-radius:9px;background:#25d366;color:#fff;font-size:9px;display:grid;place-items:center}
.sidebar{grid-column:2;grid-row:1;min-width:0;display:flex;flex-direction:column;background:#fff;border-left:1px solid #d1d7db;z-index:2}
.sidebar-head,.chat-head{height:60px;min-height:60px;background:var(--panel);display:flex;align-items:center;padding:0 16px}
.sidebar-head{justify-content:space-between}
.head-tools,.chat-tools{display:flex;gap:4px;align-items:center}
.round-btn{width:40px;height:40px;border:0;border-radius:50%;background:transparent;color:#54656f;display:grid;place-items:center;font-size:22px}
.round-btn:hover{background:#e2e6e8}
.avatar{width:46px;height:46px;border-radius:50%;flex:none;display:grid;place-items:center;background:linear-gradient(145deg,#84939b,#c1c9cd);color:#fff;font-size:18px;font-weight:700}
.my-avatar{width:40px;height:40px}
.search-area{background:#fff;padding:8px 12px 7px;border-bottom:1px solid var(--border)}
.search-box{height:42px;background:#f0f2f5;border-radius:8px;display:flex;align-items:center;padding:0 12px;gap:10px;color:#54656f}
.search-box span{font-size:20px;line-height:1}
.search-box input{min-width:0;flex:1;border:0;outline:0;background:transparent;font-size:14px;direction:rtl}
.filter-row{height:36px;display:flex;align-items:end;gap:7px;overflow:auto;scrollbar-width:none}
.filter{height:28px;padding:0 12px;border:0;border-radius:14px;background:#f0f2f5;color:#54656f;font-size:12px;white-space:nowrap}
.filter.active{background:#d9fdd3;color:#008069;font-weight:600}
.conversation-list{flex:1;overflow:auto;background:#fff}
.conversation{width:100%;height:74px;border:0;border-bottom:1px solid var(--border);background:#fff;padding:0 16px;display:flex;align-items:center;gap:12px;text-align:right;direction:rtl}
.conversation:hover,.conversation.selected{background:#f0f2f5}
.conversation-content{min-width:0;flex:1}
.conversation-top,.conversation-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;min-width:0}
.conversation-top strong{font-size:15px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.conversation-top time{font-size:11px;color:var(--muted);white-space:nowrap}
.conversation-bottom{margin-top:5px}
.preview{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:13px}
.badge{min-width:20px;height:20px;padding:0 5px;border-radius:10px;background:#25d366;color:#fff;display:grid;place-items:center;font-size:11px}
.empty-search{text-align:center;color:var(--muted);padding:40px;font-size:14px}
.chat-panel{grid-column:3;grid-row:1;min-width:0;min-height:0;display:flex;flex-direction:column;background:var(--chat)}
.chat-head{direction:rtl;gap:12px;border-bottom:1px solid #d9dfe2}
.avatar-chat{width:40px;height:40px}
.person{min-width:0;flex:1;display:flex;flex-direction:column;gap:2px}
.person strong{font-size:15px;font-weight:500}.person span{font-size:12px;color:var(--muted)}
.chat-tools{margin-right:auto}.back-btn{display:none}
.messages{position:relative;flex:1;overflow:auto;padding:14px clamp(22px,5vw,76px) 12px;background-color:var(--chat);background-image:radial-gradient(rgba(60,60,60,.045) .7px,transparent .7px);background-size:6px 6px}
.notice{max-width:620px;margin:0 auto 9px;background:#fff3c4;color:#54656f;border-radius:7px;padding:7px 12px;text-align:center;font-size:11px;line-height:1.55;box-shadow:0 1px 1px #00000012}
.date-chip{width:max-content;margin:7px auto 10px;background:#fff;border-radius:7px;padding:6px 12px;color:#667781;font-size:11px;box-shadow:0 1px 1px #00000014}
.msg{display:flex;width:100%;margin:2px 0;direction:rtl}.msg.incoming{justify-content:flex-start}.msg.outgoing{justify-content:flex-end}
.bubble{max-width:min(62%,560px);padding:6px 9px 5px;border-radius:7px;box-shadow:0 1px 1px #0000001a;line-height:1.55;font-size:14px;word-break:break-word}
.incoming .bubble{background:#fff;border-top-right-radius:2px}.outgoing .bubble{background:#d9fdd3;border-top-left-radius:2px}
.bubble small{float:left;color:#667781;font-size:10px;line-height:1;margin:6px 0 0;direction:ltr}
.bubble i{font-style:normal;color:#53a8e8;margin-right:3px}
.composer{height:62px;min-height:62px;padding:9px 12px;background:var(--panel);display:flex;align-items:center;gap:8px;direction:rtl}
.compose-btn,.mic{border:0;background:transparent;color:#54656f;width:40px;height:40px;border-radius:50%;font-size:24px;display:grid;place-items:center}
.compose-btn:hover{background:#e2e6e8}.mic{background:var(--green);color:#fff;font-size:12px}
.composer-input{height:44px;flex:1;min-width:0;background:#fff;border-radius:8px;display:flex;align-items:center;direction:rtl}
.composer-input input{min-width:0;flex:1;height:100%;border:0;outline:0;background:transparent;padding:0 5px;font-size:14px}
.emoji{width:42px;height:42px;border:0;background:transparent;color:#54656f;font-size:21px}

.mobile-nav{display:none}
@media(max-width:1200px) and (min-width:901px){.chat-app{grid-template-columns:64px 330px minmax(0,1fr)}.nav-item{width:48px}}
@media(max-width:900px){
  .chat-app{display:block;position:relative}
  .nav-rail{display:none}
  .sidebar,.chat-panel{position:absolute;inset:0;bottom:64px;width:100%;height:calc(100% - 64px)}
  .chat-panel{display:none}
  .chat-app.chat-open .sidebar{display:none}.chat-app.chat-open .chat-panel{display:flex}
  .back-btn{display:grid}
  .messages{padding-left:3%;padding-right:3%}
  .bubble{max-width:78%}
  .mobile-nav{position:absolute;display:grid;grid-template-columns:repeat(5,1fr);bottom:0;left:0;right:0;height:64px;background:#fff;border-top:1px solid #d1d7db;z-index:20;padding:5px 4px env(safe-area-inset-bottom);direction:rtl}
  .mobile-nav-item{min-width:0;border:0;background:transparent;color:#54656f;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:10px}
  .mobile-nav-item.active{background:#d9fdd3;color:#008069}
  .mobile-nav-item strong{font-size:10px;font-weight:500}
  .mobile-icon{position:relative;font-size:21px;height:26px;line-height:24px}
  .mobile-icon b{position:absolute;top:-3px;right:-9px;min-width:15px;height:15px;border-radius:8px;background:#25d366;color:#fff;font-size:8px;display:grid;place-items:center}
}
@media(max-width:520px){
  .landing-page,.auth-page{padding:14px}
  .landing-card{padding:30px 22px;border-radius:18px}
  .landing-card h1{font-size:34px}
  .feature-grid{grid-template-columns:1fr}
  .feature-grid article{padding:14px}
  .auth-card{padding:22px 18px;border-radius:16px}
  .sidebar,.chat-panel{bottom:62px;height:calc(100% - 62px)}
  .mobile-nav{height:62px}
  .sidebar-head,.chat-head{height:56px;min-height:56px;padding:0 9px}
  .search-area{padding:7px 9px 5px}
  .conversation{height:68px;padding:0 11px}
  .avatar{width:44px;height:44px}
  .messages{padding:9px 2.5%}
  .composer{height:58px;min-height:58px;padding:7px 8px}
  .composer-input{height:42px;border-radius:21px}
  .compose-btn,.mic{width:40px;height:40px}
  .bubble{max-width:88%}
}
@media(min-width:901px) and (max-width:1200px){.messages{padding-left:3.5%;padding-right:3.5%}}

.chat-data-loading{padding:24px;text-align:center;color:#667781;font-size:14px}.auth-form label+label{margin-top:14px}

.phone-row{display:grid;grid-template-columns:130px minmax(0,1fr);gap:10px}.secondary-btn{width:100%;height:46px;border:1px solid #d8dee2;border-radius:10px;background:#fff;color:#54656f;font-weight:600}.secondary-btn:hover{background:#f0f2f5}@media(max-width:520px){.phone-row{grid-template-columns:1fr}.landing-card{padding:32px}.feature-grid{grid-template-columns:1fr}.auth-card{padding:22px}}

.home-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}@media(max-width:520px){.home-actions{grid-template-columns:1fr}}

/* New chat / international phone lookup */
.modal-backdrop{position:fixed;inset:0;background:rgba(11,20,26,.48);display:grid;place-items:center;z-index:1000;padding:20px}
.modal-backdrop[hidden]{display:none}
.new-chat-modal{width:min(460px,100%);background:#fff;border-radius:14px;box-shadow:0 18px 60px rgba(0,0,0,.22);overflow:hidden;direction:rtl}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--border)}
.modal-head>div{display:flex;flex-direction:column;gap:5px}
.modal-head strong{font-size:17px}
.modal-head span{font-size:12px;color:var(--muted)}
.phone-search-form{padding:18px 20px}
.phone-fields{display:grid;grid-template-columns:110px 1fr;gap:10px}
.phone-fields label{display:flex;flex-direction:column;gap:7px}
.phone-fields label>span{font-size:12px;color:#54656f}
.phone-fields input{height:44px;border:1px solid #d8dee2;border-radius:8px;padding:0 12px;outline:0;font-size:14px;background:#fff}
.phone-fields input:focus{border-color:#00a884;box-shadow:0 0 0 2px rgba(0,168,132,.12)}
.phone-search-form .primary-btn{margin-top:14px;width:100%;height:44px}
.phone-search-result{padding:0 20px 20px}
.contact-result{display:flex;align-items:center;gap:12px;padding:13px;border:1px solid #e0e5e7;border-radius:10px}
.contact-result-main{min-width:0;flex:1}
.contact-result-main strong{display:block;font-size:14px}
.contact-result-main span{display:block;color:var(--muted);font-size:12px;margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.contact-result .primary-btn{width:auto;min-width:92px;height:38px}
.search-message{padding:14px;border-radius:9px;background:#f0f2f5;color:#54656f;font-size:13px;text-align:center}
.search-message.error{background:#fff1f0;color:#b42318}
@media (max-width:640px){
  .modal-backdrop{padding:12px}
  .new-chat-modal{border-radius:12px}
}