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<!DOCTYPE html>
<html lang="fa" dir="rtl">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
  <title>پیام رسان مینیمال | MinimalChat</title>
  
  <style>
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e1b4b 100%);
      background-attachment: fixed;
      -webkit-tap-highlight-color: transparent;
      margin: 0;
      padding: 0;
      color: white;
    }

    .glass-panel {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .input-minimal {
      background: transparent;
      border-bottom: 1px solid rgba(255, 255, 255, 0.2);
      transition: all 0.3s;
    }

    .input-minimal:focus {
      border-color: rgba(255, 255, 255, 0.6);
      outline: none;
    }

    .message-bubble-me {
      background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
      border-radius: 16px 16px 4px 16px;
    }

    .message-bubble-other {
      background: rgba(255, 255, 255, 0.12);
      border-radius: 16px 16px 16px 4px;
    }

    .fade-in {
      animation: fadeIn 0.3s ease-out;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .slide-in {
      animation: slideIn 0.3s ease-out;
    }

    @keyframes slideIn {
      from {
        transform: translateX(100%);
      }
      to {
        transform: translateX(0);
      }
    }

    .slide-out {
      animation: slideOut 0.3s ease-out;
    }

    @keyframes slideOut {
      from {
        transform: translateX(0);
      }
      to {
        transform: translateX(100%);
      }
    }

    /* Custom Scrollbar */
    ::-webkit-scrollbar {
      width: 4px;
      height: 4px;
    }

    ::-webkit-scrollbar-track {
      background: transparent;
    }

    ::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.2);
      border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
      background: rgba(255, 255, 255, 0.3);
    }

    /* Mobile Optimizations */
    @media (max-width: 768px) {
      .mobile-sidebar {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        height: 100dvh;
        width: 85%;
        max-width: 300px;
        z-index: 40;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      }

      .mobile-sidebar.open {
        transform: translateX(0);
      }

      .sidebar-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(4px);
        z-index: 35;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s;
      }

      .sidebar-overlay.active {
        opacity: 1;
        pointer-events: auto;
      }

      .chat-container {
        position: fixed;
        inset: 0;
        z-index: 30;
      }

      .safe-bottom {
        padding-bottom: env(safe-area-inset-bottom, 20px);
      }
    }

    /* Touch friendly buttons */
    .touch-target {
      min-height: 44px;
      min-width: 44px;
    }

    /* Prevent zoom on input focus for iOS */
    @media screen and (max-width: 768px) {
      input,
      textarea,
      select {
        font-size: 16px;
      }
    }

    /* Message animations */
    .message-enter {
      animation: messagePop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }

    @keyframes messagePop {
      0% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
      }
      100% {
        opacity: 1;
        transform: scale(1) translateY(0);
      }
    }

    /* Loading shimmer */
    .shimmer {
      background: linear-gradient(90deg, rgba(255, 255, 255, 0.05) 25%, rgba(255, 255, 255, 0.1) 50%, rgba(255, 255, 255, 0.05) 75%);
      background-size: 200% 100%;
      animation: shimmer 1.5s infinite;
    }

    @keyframes shimmer {
      0% {
        background-position: 200% 0;
      }
      100% {
        background-position: -200% 0;
      }
    }

    /* Sticker picker styles */
    .sticker-picker {
      position: absolute;
      bottom: 70px;
      right: 0;
      width: 100%;
      max-height: 300px;
      background: rgba(30, 27, 75, 0.95);
      border-radius: 12px 12px 0 0;
      border: 1px solid rgba(255, 255, 255, 0.1);
      overflow-y: auto;
      padding: 10px;
      display: none;
      z-index: 100;
    }

    .sticker-picker.active {
      display: block;
    }

    .sticker-category {
      margin-bottom: 10px;
    }

    .sticker-category-title {
      font-size: 12px;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 5px;
      padding-right: 5px;
    }

    .sticker-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 5px;
    }

    .sticker-item {
      width: 100%;
      aspect-ratio: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border-radius: 8px;
      transition: background 0.2s;
    }

    .sticker-item:hover {
      background: rgba(255, 255, 255, 0.1);
    }

    .sticker-item img {
      max-width: 80%;
      max-height: 80%;
    }

    /* Profile edit modal */
    .profile-edit-modal {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 100;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s;
    }

    .profile-edit-modal.active {
      opacity: 1;
      pointer-events: auto;
    }

    .profile-edit-content {
      background: #1e1b4b;
      border-radius: 16px;
      padding: 20px;
      width: 90%;
      max-width: 400px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .avatar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-top: 15px;
    }

    .avatar-option {
      width: 100%;
      aspect-ratio: 1;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      cursor: pointer;
      transition: transform 0.2s;
    }

    .avatar-option:hover {
      transform: scale(1.1);
    }

    .avatar-option.selected {
      border: 3px solid #3b82f6;
    }

    /* Room settings modal */
    .room-settings-modal {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 100;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s;
    }

    .room-settings-modal.active {
      opacity: 1;
      pointer-events: auto;
    }

    .room-settings-content {
      background: #1e1b4b;
      border-radius: 16px;
      padding: 20px;
      width: 90%;
      max-width: 400px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .danger-zone {
      border-top: 1px solid rgba(255, 0, 0, 0.3);
      padding-top: 15px;
      margin-top: 15px;
    }

    .danger-button {
      background: rgba(255, 0, 0, 0.2);
      color: #ff6b6b;
      border: 1px solid rgba(255, 0, 0, 0.3);
    }

    .danger-button:hover {
      background: rgba(255, 0, 0, 0.3);
    }
  </style>
</head>

<body class="text-white h-screen h-[100dvh] overflow-hidden selection:bg-blue-500/30 bg-slate-900">

<!-- Toast Container -->
<div id="toast-container" class="fixed top-4 left-1/2 transform -translate-x-1/2 z-50 flex flex-col gap-2 w-full max-w-sm px-4 pointer-events-none">
</div>

<!-- Auth View -->
<div id="auth-view" class="h-full w-full flex items-center justify-center p-4 overflow-y-auto">
  <div class="glass-panel p-6 md:p-8 rounded-2xl w-full max-w-md fade-in my-auto">
    <div class="text-center mb-6 md:mb-8">
      <div class="w-14 h-14 md:w-16 md:h-16 bg-white/10 rounded-full mx-auto flex items-center justify-center mb-4">
        <span style="font-size: 24px;">💬</span>
      </div>
      <h1 class="text-xl md:text-2xl font-bold">پیام رسان مینیمال</h1>
      <p class="text-white/50 text-xs md:text-sm mt-1">پیام رسان مینیمال با PHP</p>
    </div>

    <!-- Tabs -->
    <div class="flex gap-4 mb-6 border-b border-white/10 pb-1">
      <button onclick="switchAuthTab('login')" id="tab-login" class="flex-1 pb-2 text-sm font-medium border-b-2 border-white text-white transition-colors touch-target flex items-center justify-center">ورود</button>
      <button onclick="switchAuthTab('register')" id="tab-register" class="flex-1 pb-2 text-sm font-medium border-b-2 border-transparent text-white/50 hover:text-white transition-colors touch-target flex items-center justify-center">ثبت نام</button>
    </div>

    <!-- Login Form -->
    <form id="login-form" class="space-y-4 md:space-y-5" onsubmit="handleLogin(event)">
      <div>
        <label class="block text-xs text-white/60 mb-2">شماره موبایل</label>
        <input type="tel" id="login-phone" placeholder="09XXXXXXXXX" inputmode="tel" class="w-full input-minimal py-3 text-white placeholder-white/30 touch-target" required>
      </div>
      <div>
        <label class="block text-xs text-white/60 mb-2">رمز عبور</label>
        <input type="password" id="login-password" placeholder="••••••••" class="w-full input-minimal py-3 text-white placeholder-white/30 touch-target" required>
      </div>
      <button type="submit" class="w-full bg-white text-slate-900 font-bold py-3 rounded-lg hover:bg-white/90 transition-colors mt-4 touch-target active:scale-95 transform transition-transform">
        ورود
      </button>
    </form>

    <!-- Register Form -->
    <form id="register-form" class="space-y-4 md:space-y-5 hidden" onsubmit="handleRegister(event)">
      <div>
        <label class="block text-xs text-white/60 mb-2">نام کامل</label>
        <input type="text" id="reg-name" placeholder="نام شما" class="w-full input-minimal py-3 text-white placeholder-white/30 touch-target" required>
      </div>
      <div>
        <label class="block text-xs text-white/60 mb-2">شماره موبایل</label>
        <input type="tel" id="reg-phone" placeholder="09XXXXXXXXX" inputmode="tel" class="w-full input-minimal py-3 text-white placeholder-white/30 touch-target" required>
      </div>
      <div>
        <label class="block text-xs text-white/60 mb-2">رمز عبور</label>
        <input type="password" id="reg-password" placeholder="حداقل ۴ کاراکتر" class="w-full input-minimal py-3 text-white placeholder-white/30 touch-target" required>
      </div>
      <button type="submit" class="w-full bg-white text-slate-900 font-bold py-3 rounded-lg hover:bg-white/90 transition-colors mt-4 touch-target active:scale-95 transform transition-transform">
        ثبت نام
      </button>
    </form>

    <div class="mt-6 text-center">
      <p class="text-xs text-white/40">
        ساخته شده با PHP و MySQL
      </p>
    </div>
  </div>
</div>

<!-- Dashboard View -->
<div id="dashboard-view" class="h-full w-full flex flex-col md:flex-row relative hidden">

  <!-- Mobile Sidebar Overlay -->
  <div id="sidebar-overlay" class="sidebar-overlay md:hidden" onclick="toggleSidebar()"></div>

  <!-- Sidebar -->
  <aside id="sidebar"
    class="mobile-sidebar md:relative md:transform-none md:w-72 md:h-full glass-panel border-l border-white/10 flex flex-col bg-slate-900/95 md:bg-transparent">
    <!-- Profile -->
    <div class="p-4 md:p-6 border-b border-white/10 flex items-center justify-between">
      <div class="flex items-center gap-3 flex-1">
        <div id="user-avatar" class="w-10 h-10 md:w-12 md:h-12 rounded-full flex items-center justify-center text-blue-300 font-bold text-lg">
          <span id="user-avatar-initial">U</span>
        </div>
        <div class="flex-1 min-w-0">
          <h2 id="user-name-display" class="font-bold text-sm truncate">کاربر</h2>
          <p id="user-phone-display" class="text-xs text-white/50 font-mono">09123456789</p>
        </div>
      </div>
      <button onclick="logout()" class="text-white/40 hover:text-white transition-colors p-2 touch-target mr-2">
        <span style="font-size: 18px;">🚪</span>
      </button>
    </div>

    <!-- Create Room -->
    <div class="p-4 border-b border-white/10">
      <div class="flex justify-between items-center mb-3">
        <span class="text-xs font-medium text-white/60">اتاق‌های من</span>
        <span id="room-count-badge" class="text-xs bg-white/10 px-2 py-0.5 rounded-full">۰/۳</span>
      </div>
      <button onclick="openCreateRoomModal()" id="btn-create-room" class="w-full py-3 border border-dashed border-white/20 rounded-lg text-sm text-white/70 hover:border-white/40 hover:text-white transition-colors touch-target">
        <span style="font-size: 14px;">➕</span> اتاق جدید
      </button>
      <p id="room-limit-msg" class="text-xs text-red-400 mt-2 hidden">حداکثر ۳ اتاق مجاز است</p>
    </div>

    <!-- Room List -->
    <div class="flex-1 overflow-y-auto p-2 space-y-1" id="room-list-container">
      <div class="text-center mt-8 text-white/30 text-sm">
        <p>اتاقی وجود ندارد</p>
      </div>
    </div>

    <!-- Mobile Safe Area -->
    <div class="h-safe-bottom md:hidden"></div>
  </aside>

  <!-- Main Content -->
  <main class="flex-1 flex flex-col h-full relative bg-slate-900/20 w-full">

    <!-- Mobile Header -->
    <header
      class="h-14 glass-panel border-b border-white/10 flex items-center justify-between px-4 md:px-6 md:hidden">
      <button onclick="toggleSidebar()" class="touch-target flex items-center justify-center w-10 h-10 -mr-2 text-white/80">
        <span style="font-size: 18px;">☰</span>
      </button>
      <span class="text-sm font-medium text-white/60">پیام رسان مینیمال</span>
      <div class="w-10"></div> <!-- Spacer for balance -->
    </header>

    <!-- Desktop Header -->
    <header class="hidden md:flex h-14 glass-panel border-b border-white/10 items-center justify-between px-6">
      <span class="text-sm font-medium text-white/60">داشبورد</span>
      <div class="flex items-center gap-2 text-xs text-white/40">
        <span class="w-2 h-2 bg-green-500 rounded-full animate-pulse"></span>
        آنلاین
      </div>
    </header>

    <!-- Welcome Screen -->
    <div id="welcome-screen" class="flex-1 flex flex-col items-center justify-center p-8 text-center">
      <div class="w-16 h-16 md:w-20 md:h-20 bg-white/5 rounded-full flex items-center justify-center mb-4">
        <span style="font-size: 28px;">💬</span>
      </div>
      <h2 class="text-lg md:text-xl font-bold mb-2">به پیام رسان خوش آمدید</h2>
      <p class="text-white/50 text-sm max-w-md">اتاق جدید بسازید یا یکی را انتخاب کنید</p>
      <button onclick="openCreateRoomModal()" class="mt-6 md:hidden bg-white/10 px-6 py-3 rounded-full text-sm font-medium touch-target">
        <span style="font-size: 14px;">➕</span> ساخت اتاق جدید
      </button>
    </div>

    <!-- Chat Interface -->
    <div id="chat-interface" class="hidden absolute inset-0 bg-slate-900 flex flex-col fade-in z-20">
      <!-- Chat Header -->
      <div class="h-14 glass-panel border-b border-white/10 flex items-center justify-between px-4 safe-top">
        <div class="flex items-center gap-3 flex-1 min-w-0">
          <button onclick="closeChat()" class="md:hidden text-white/60 hover:text-white touch-target w-10 h-10 flex items-center justify-center -mr-2">
            <span style="font-size: 18px;">←</span>
          </button>
          <div
            class="w-9 h-9 md:w-10 md:h-10 rounded-full bg-indigo-500/20 flex items-center justify-center shrink-0">
            <span style="font-size: 14px;">#</span>
          </div>
          <div class="min-w-0 flex-1">
            <h3 id="chat-room-name" class="font-bold text-sm truncate">اتاق</h3>
            <span id="chat-user-count" class="text-xs text-white/50">۲ عضو</span>
          </div>
        </div>
        <button onclick="openRoomSettings()" class="text-white/40 hover:text-white text-sm touch-target w-10 h-10 flex items-center justify-center">
          <span style="font-size: 18px;">⚙️</span>
        </button>
      </div>

      <!-- Messages -->
      <div id="messages-container" class="flex-1 overflow-y-auto p-4 space-y-3 pb-20 md:pb-4">
        <!-- Messages injected here -->
      </div>

      <!-- Sticker Picker -->
      <div id="sticker-picker" class="sticker-picker">
        <div class="sticker-category">
          <div class="sticker-category-title">خنده</div>
          <div class="sticker-grid">
            <div class="sticker-item" onclick="insertSticker('😂')">😂</div>
            <div class="sticker-item" onclick="insertSticker('😆')">😆</div>
            <div class="sticker-item" onclick="insertSticker('😅')">😅</div>
            <div class="sticker-item" onclick="insertSticker('🤣')">🤣</div>
            <div class="sticker-item" onclick="insertSticker('😁')">😁</div>
          </div>
        </div>
        <div class="sticker-category">
          <div class="sticker-category-title">احساسات</div>
          <div class="sticker-grid">
            <div class="sticker-item" onclick="insertSticker('😍')">😍</div>
            <div class="sticker-item" onclick="insertSticker('😘')">😘</div>
            <div class="sticker-item" onclick="insertSticker('🥰')">🥰</div>
            <div class="sticker-item" onclick="insertSticker('😊')">😊</div>
            <div class="sticker-item" onclick="insertSticker('😢')">😢</div>
          </div>
        </div>
        <div class="sticker-category">
          <div class="sticker-category-title">دیگر</div>
          <div class="sticker-grid">
            <div class="sticker-item" onclick="insertSticker('👍')">👍</div>
            <div class="sticker-item" onclick="insertSticker('👎')">👎</div>
            <div class="sticker-item" onclick="insertSticker('❤️')">❤️</div>
            <div class="sticker-item" onclick="insertSticker('🔥')">🔥</div>
            <div class="sticker-item" onclick="insertSticker('🎉')">🎉</div>
          </div>
        </div>
      </div>

      <!-- Input -->
      <div
        class="absolute bottom-0 left-0 right-0 p-3 md:p-4 glass-panel border-t border-white/10 safe-bottom bg-slate-900/90 backdrop-blur-xl">
        <form onsubmit="sendMessage(event)" class="flex gap-2 max-w-4xl mx-auto">
          <button type="button" onclick="toggleStickerPicker()" class="bg-white/10 border border-white/10 rounded-full w-11 h-11 flex items-center justify-center transition-colors touch-target active:scale-95 transform shrink-0">
            <span style="font-size: 18px;">😊</span>
          </button>
          <input type="text" id="message-input" placeholder="پیام خود را بنویسید..."
            class="flex-1 bg-white/10 border border-white/10 rounded-full px-4 py-3 text-sm text-white placeholder-white/30 focus:outline-none focus:border-white/30 focus:bg-white/15 transition-all touch-target"
            autocomplete="off">
          <button type="submit" class="bg-blue-600 hover:bg-blue-500 text-white w-11 h-11 rounded-full flex items-center justify-center transition-colors touch-target active:scale-95 transform shadow-lg shadow-blue-600/30 shrink-0">
            <span style="font-size: 18px;">📤</span>
          </button>
        </form>
      </div>
    </div>
  </main>
</div>

<!-- Create Room Modal -->
<div id="create-room-modal"
  class="fixed inset-0 z-50 hidden flex items-end md:items-center justify-center p-0 md:p-4 bg-black/60 backdrop-blur-sm transition-opacity">
  <div
    class="glass-panel w-full md:max-w-sm rounded-t-2xl md:rounded-2xl p-6 fade-in bg-slate-900 border-t md:border border-white/10">
    <div class="flex justify-between items-center mb-4">
      <h3 class="font-bold text-lg">اتاق جدید</h3>
      <button onclick="closeCreateRoomModal()" class="text-white/40 hover:text-white touch-target w-10 h-10 flex items-center justify-center">
        <span style="font-size: 20px;">✕</span>
      </button>
    </div>
    <form onsubmit="handleCreateRoom(event)" class="space-y-4">
      <div>
        <label class="block text-xs text-white/60 mb-2">نام اتاق</label>
        <input type="text" id="new-room-name" placeholder="مثلاً: گروه دوستان"
          class="w-full bg-white/5 border border-white/10 rounded-xl px-4 py-3 text-white placeholder-white/30 focus:outline-none focus:border-white/30 touch-target"
          required>
      </div>
      <div class="flex gap-3 pt-2">
        <button type="button" onclick="closeCreateRoomModal()" class="flex-1 py-3 rounded-xl border border-white/10 text-sm hover:bg-white/5 transition-colors touch-target">
          انصراف
        </button>
        <button type="submit" class="flex-1 py-3 rounded-xl bg-white text-slate-900 text-sm font-bold hover:bg-white/90 transition-colors touch-target active:scale-95 transform">
          ساختن
        </button>
      </div>
    </form>
  </div>
</div>

<!-- Profile Edit Modal -->
<div id="profile-edit-modal" class="profile-edit-modal">
  <div class="profile-edit-content">
    <div class="flex justify-between items-center mb-4">
      <h3 class="font-bold text-lg">ویرایش پروفایل</h3>
      <button onclick="closeProfileEditModal()" class="text-white/40 hover:text-white touch-target w-10 h-10 flex items-center justify-center">
        <span style="font-size: 20px;">✕</span>
      </button>
    </div>
    <form onsubmit="saveProfile(event)" class="space-y-4">
      <div>
        <label class="block text-xs text-white/60 mb-2">نام کامل</label>
        <input type="text" id="edit-profile-name" placeholder="نام شما"
          class="w-full bg-white/5 border border-white/10 rounded-xl px-4 py-3 text-white placeholder-white/30 focus:outline-none focus:border-white/30 touch-target"
          required>
      </div>
      <div>
        <label class="block text-xs text-white/60 mb-2">رنگ آواتار</label>
        <div class="avatar-grid">
          <div class="avatar-option" style="background-color: #3b82f620;" onclick="selectAvatarColor('#3b82f6')">A</div>
          <div class="avatar-option" style="background-color: #ef444420;" onclick="selectAvatarColor('#ef4444')">B</div>
          <div class="avatar-option" style="background-color: #10b98120;" onclick="selectAvatarColor('#10b981')">C</div>
          <div class="avatar-option" style="background-color: #f59e0b20;" onclick="selectAvatarColor('#f59e0b')">D</div>
          <div class="avatar-option" style="background-color: #8b5cf620;" onclick="selectAvatarColor('#8b5cf6')">E</div>
          <div class="avatar-option" style="background-color: #ec489920;" onclick="selectAvatarColor('#ec4899')">F</div>
          <div class="avatar-option" style="background-color: #14b8a620;" onclick="selectAvatarColor('#14b8a6')">G</div>
          <div class="avatar-option" style="background-color: #f9731620;" onclick="selectAvatarColor('#f97316')">H</div>
        </div>
        <input type="hidden" id="edit-profile-color" value="#3b82f6">
      </div>
      <div class="flex gap-3 pt-2">
        <button type="button" onclick="closeProfileEditModal()" class="flex-1 py-3 rounded-xl border border-white/10 text-sm hover:bg-white/5 transition-colors touch-target">
          انصراف
        </button>
        <button type="submit" class="flex-1 py-3 rounded-xl bg-white text-slate-900 text-sm font-bold hover:bg-white/90 transition-colors touch-target active:scale-95 transform">
          ذخیره
        </button>
      </div>
    </form>
  </div>
</div>

<!-- Room Settings Modal -->
<div id="room-settings-modal" class="room-settings-modal">
  <div class="room-settings-content">
    <div class="flex justify-between items-center mb-4">
      <h3 class="font-bold text-lg">تنظیمات اتاق</h3>
      <button onclick="closeRoomSettingsModal()" class="text-white/40 hover:text-white touch-target w-10 h-10 flex items-center justify-center">
        <span style="font-size: 20px;">✕</span>
      </button>
    </div>
    <form onsubmit="updateRoomSettings(event)" class="space-y-4">
      <div>
        <label class="block text-xs text-white/60 mb-2">نام اتاق</label>
        <input type="text" id="edit-room-name" placeholder="نام اتاق"
          class="w-full bg-white/5 border border-white/10 rounded-xl px-4 py-3 text-white placeholder-white/30 focus:outline-none focus:border-white/30 touch-target"
          required>
      </div>
      <div>
        <label class="block text-xs text-white/60 mb-2">رنگ آواتار اتاق</label>
        <div class="avatar-grid">
          <div class="avatar-option" style="background-color: #3b82f620;" onclick="selectRoomColor('#3b82f6')">#</div>
          <div class="avatar-option" style="background-color: #ef444420;" onclick="selectRoomColor('#ef4444')">#</div>
          <div class="avatar-option" style="background-color: #10b98120;" onclick="selectRoomColor('#10b981')">#</div>
          <div class="avatar-option" style="background-color: #f59e0b20;" onclick="selectRoomColor('#f59e0b')">#</div>
          <div class="avatar-option" style="background-color: #8b5cf620;" onclick="selectRoomColor('#8b5cf6')">#</div>
          <div class="avatar-option" style="background-color: #ec489920;" onclick="selectRoomColor('#ec4899')">#</div>
          <div class="avatar-option" style="background-color: #14b8a620;" onclick="selectRoomColor('#14b8a6')">#</div>
          <div class="avatar-option" style="background-color: #f9731620;" onclick="selectRoomColor('#f97316')">#</div>
        </div>
        <input type="hidden" id="edit-room-color" value="#3b82f6">
      </div>
      <div class="danger-zone">
        <h4 class="text-xs font-medium text-red-400 mb-2">منطقه خطر</h4>
        <button type="button" onclick="confirmDeleteRoom()" class="w-full py-3 rounded-xl text-sm font-medium transition-colors touch-target danger-button">
          حذف اتاق
        </button>
      </div>
      <div class="flex gap-3 pt-2">
        <button type="button" onclick="closeRoomSettingsModal()" class="flex-1 py-3 rounded-xl border border-white/10 text-sm hover:bg-white/5 transition-colors touch-target">
          انصراف
        </button>
        <button type="submit" class="flex-1 py-3 rounded-xl bg-white text-slate-900 text-sm font-bold hover:bg-white/90 transition-colors touch-target active:scale-95 transform">
          ذخیره
        </button>
      </div>
    </form>
  </div>
</div>

<!-- Confirmation Modal -->
<div id="confirm-modal" class="profile-edit-modal">
  <div class="profile-edit-content">
    <div class="flex justify-between items-center mb-4">
      <h3 class="font-bold text-lg" id="confirm-title">تایید حذف</h3>
      <button onclick="closeConfirmModal()" class="text-white/40 hover:text-white touch-target w-10 h-10 flex items-center justify-center">
        <span style="font-size: 20px;">✕</span>
      </button>
    </div>
    <p id="confirm-message" class="mb-6">آیا مطمئن هستید که می‌خواهید این اتاق را حذف کنید؟ این عمل قابل بازگشت نیست.</p>
    <div class="flex gap-3">
      <button onclick="closeConfirmModal()" class="flex-1 py-3 rounded-xl border border-white/10 text-sm hover:bg-white/5 transition-colors touch-target">
        انصراف
      </button>
      <button onclick="executeConfirmedAction()" class="flex-1 py-3 rounded-xl bg-red-600 text-white text-sm font-bold hover:bg-red-500 transition-colors touch-target active:scale-95 transform">
        حذف
      </button>
    </div>
  </div>
</div>

<script>
// ========== Global Variables ==========
let currentUser = {
  id: 1,
  name: "کاربر تست",
  phone: "09123456789",
  avatar_color: "#3b82f6"
};
let currentRoomId = null;
let isSidebarOpen = false;
let messagePollInterval = null;
let stickerPickerOpen = false;
let pendingAction = null;

// ========== Helper Functions ==========

// Show toast notification
function showToast(message, type = 'info') {
    const container = document.getElementById('toast-container');
    const toast = document.createElement('div');
    
    let bgClass = 'bg-white/10';
    let icon = 'ℹ️';
    
    if (type === 'success') { bgClass = 'bg-green-500/20 text-green-200 border border-green-500/30'; icon = '✅'; }
    if (type === 'error') { bgClass = 'bg-red-500/20 text-red-200 border border-red-500/30'; icon = '❌'; }

    toast.className = `${bgClass} px-4 py-3 rounded-xl flex items-center gap-3 text-sm backdrop-blur-md fade-in shadow-lg`;
    toast.innerHTML = `<span>${icon}</span><span class="font-medium">${message}</span>`;

    container.appendChild(toast);

    setTimeout(() => {
        toast.style.opacity = '0';
        toast.style.transform = 'translateY(-10px)';
        setTimeout(() => toast.remove(), 300);
    }, 3000);
}

// Simulate API call
async function apiCall(endpoint, data = null, method = 'POST') {
    // Simulate network delay
    await new Promise(resolve => setTimeout(resolve, 300));
    
    // Mock responses for demo purposes
    if (endpoint.includes('auth.php?action=login')) {
        return {
            success: true,
            message: "ورود موفقیت‌آمیز بود",
            data: {
                id: 1,
                name: data.phone === "09123456789" ? "کاربر تست" : "کاربر جدید",
                phone: data.phone,
                avatar_color: "#3b82f6"
            }
        };
    }
    
    if (endpoint.includes('auth.php?action=register')) {
        return {
            success: true,
            message: "ثبت‌نام موفقیت‌آمیز بود",
            data: {
                id: 2,
                name: data.name,
                phone: data.phone,
                avatar_color: "#" + Math.floor(Math.random()*16777215).toString(16)
            }
        };
    }
    
    if (endpoint.includes('rooms.php?action=list')) {
        return {
            success: true,
            data: {
                created_rooms: [
                    { id: 1, name: "گروه دوستان", creator_id: 1, member_count: 3 },
                    { id: 2, name: "گروه خانواده", creator_id: 1, member_count: 5 }
                ],
                member_rooms: [
                    { id: 3, name: "گروه کاری", creator_id: 2, member_count: 8 }
                ],
                created_count: 2
            }
        };
    }
    
    if (endpoint.includes('rooms.php?action=create')) {
        return {
            success: true,
            message: "اتاق با موفقیت ایجاد شد",
            data: {
                id: Math.floor(Math.random() * 1000) + 3,
                name: data.name,
                creator_id: currentUser.id,
                member_count: 1
            }
        };
    }
    
    if (endpoint.includes('rooms.php?action=get')) {
        return {
            success: true,
            data: {
                id: parseInt(endpoint.split('=')[1]),
                name: "اتاق تست",
                creator_id: currentUser.id,
                member_count: 3,
                avatar_color: "#3b82f6"
            }
        };
    }
    
    if (endpoint.includes('messages.php?action=get')) {
        return {
            success: true,
            data: [
                { id: 1, room_id: 1, user_id: 1, sender_name: "کاربر تست", message: "سلام به همه!", created_at: "2023-05-15 10:30:00" },
                { id: 2, room_id: 1, user_id: 2, sender_name: "کاربر دیگر", message: "سلام! چطوری؟", created_at: "2023-05-15 10:32:00" },
                { id: 3, room_id: 1, user_id: 1, sender_name: "کاربر تست", message: "خوبم ممنون! 😊", created_at: "2023-05-15 10:33:00" }
            ]
        };
    }
    
    if (endpoint.includes('messages.php?action=send')) {
        return {
            success: true,
            data: {
                id: Math.floor(Math.random() * 1000) + 10,
                room_id: data.room_id,
                user_id: currentUser.id,
                sender_name: currentUser.name,
                message: data.message,
                created_at: new Date().toISOString()
            }
        };
    }
    
    if (endpoint.includes('auth.php?action=logout')) {
        return { success: true };
    }
    
    if (endpoint.includes('rooms.php?action=delete')) {
        return { success: true, message: "اتاق با موفقیت حذف شد" };
    }
    
    if (endpoint.includes('rooms.php?action=update')) {
        return { success: true, message: "اتاق با موفقیت به‌روزرسانی شد" };
    }
    
    if (endpoint.includes('profile.php?action=update')) {
        return { success: true, message: "پروفایل با موفقیت به‌روزرسانی شد" };
    }
    
    return { success: false, message: "خطا در ارتباط با سرور" };
}

// Escape HTML
function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

// Scroll to bottom of messages
function scrollToBottom() {
    const container = document.getElementById('messages-container');
    if (container) {
        container.scrollTop = container.scrollHeight;
    }
}

// Check if user is near bottom of messages
function isUserNearBottom() {
    const container = document.getElementById('messages-container');
    if (!container) return false;
    const threshold = 100;
    return container.scrollHeight - container.scrollTop - container.clientHeight < threshold;
}

// ========== Auth Functions ==========

async function handleRegister(e) {
    e.preventDefault();
    
    const name = document.getElementById('reg-name').value.trim();
    const phone = document.getElementById('reg-phone').value.trim();
    const password = document.getElementById('reg-password').value;
    
    if (phone.length < 11) {
        showToast('شماره موبایل صحیح نیست', 'error');
        return;
    }
    
    try {
        const result = await apiCall('auth.php?action=register', {
            name: name,
            phone: phone,
            password: password
        });
        
        showToast(result.message, 'success');
        
        // Simulate login after registration
        currentUser = result.data;
        document.getElementById('auth-view').classList.add('hidden');
        document.getElementById('dashboard-view').classList.remove('hidden');
        updateUserProfile();
        await renderRoomList();
        
    } catch (error) {
        showToast(error.message || 'خطا در ثبت‌نام', 'error');
    }
}

async function handleLogin(e) {
    e.preventDefault();
    
    const phone = document.getElementById('login-phone').value.trim();
    const password = document.getElementById('login-password').value;
    
    try {
        const result = await apiCall('auth.php?action=login', {
            phone: phone,
            password: password
        });
        
        currentUser = result.data;
        document.getElementById('auth-view').classList.add('hidden');
        document.getElementById('dashboard-view').classList.remove('hidden');
        updateUserProfile();
        await renderRoomList();
        
        showToast(`خوش آمدید ${result.data.name}`, 'success');
        
    } catch (error) {
        showToast(error.message || 'خطا در ورود', 'error');
    }
}

async function logout() {
    try {
        await apiCall('auth.php?action=logout');
        document.getElementById('dashboard-view').classList.add('