@import url('https://fonts.googleapis.com/css2?family=Vazirmatn&display=swap');
    :root {
      --accent: #2196f3;
      --text-color: #ffffff;
      --box-bg: rgba(0, 0, 0, 0.2);
      --info-box-bg: rgba(0, 0, 0, 0.1);
      --telegram-quote-bg: rgba(0, 0, 0, 0.2);
      --telegram-quote-border: #00bcd4;
    }
    body {
      margin: 0;
      font-family: "Vazirmatn", sans-serif;
      background-image: url('https://lachost.ir/background.jpg');
      background-size: cover;
      background-attachment: fixed;
      background-position: center;
      background-color: #0d1b2a;
      color: var(--text-color);
      transition: all 0.3s ease;
      overflow-x: hidden;
    }
    header {
      background-color: rgba(28, 42, 53, 0.90);
      backdrop-filter: blur(15px);
      -webkit-backdrop-filter: blur(15px);
      color: white;
      text-align: center;
      font-size: 1.5rem;
      font-weight: bold;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      transition: box-shadow 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(0,0,0,0.6);
      height: 60px;
      padding: 0 20px;
    }
    .header-nav {
        display: flex;
        gap: 1.5rem;
    }
    .header-nav a {
        color: var(--text-color);
        text-decoration: none;
        font-size: 1rem;
        font-weight: bold;
        padding: 0.5rem 0;
        transition: color 0.3s, transform 0.3s;
        position: relative;
        cursor: pointer;
    }
    .header-nav a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background-color: var(--accent);
        transition: width 0.3s ease;
    }
    .header-nav a.active {
        color: var(--accent);
    }
    .header-nav a.active::after {
        width: 100%;
    }
    .header-nav a:not(.active):hover {
        color: var(--accent);
        transform: translateY(-2px);
    }
    .header-nav a:not(.active):hover::after {
        width: 100%;
    }
    .header-nav a.active:hover {
        transform: translateY(-2px);
    }
    @media (max-width: 480px) {
        .header-nav {
            gap: 0.8rem;
        }
        .header-nav a {
            font-size: 0.9rem;
            padding: 0.5rem 0.2rem;
        }
        header {
            padding: 0 10px;
        }
    }
    .content-page {
        max-width: 800px;
        margin: 0 auto;
        padding: 5rem 2rem 5rem;
        z-index: 100;
        position: relative;
        display: none;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.4s ease, transform 0.4s ease;
        visibility: visible;
        min-height: 100vh;
        overflow: visible;
    }
    .content-page.page-fade-in {
        opacity: 1;
        transform: translateY(0);
    }
    @keyframes cardFloat {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }
    .card {
      background-color: var(--box-bg);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      color: var(--text-color);
      border-radius: 15px;
      padding: 2rem;
      margin-bottom: 2rem;
      text-align: center;
      transition: all 0.3s ease;
    }
    .buttons {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 1rem;
      margin-top: 1.5rem;
    }
    .btn {
      background-color: var(--accent);
      color: white;
      padding: 0.6rem 1.2rem;
      border: none;
      border-radius: 10px;
      font-size: 1rem;
      cursor: pointer;
      text-decoration: none;
      display: inline-block;
      transition: 0.3s;
    }
    .btn:hover {
      background-color: #1976d2;
      transform: scale(1.05);
    }
    .blue-info-box {
      background-color: var(--info-box-bg);
      backdrop-filter: blur(5px);
      -webkit-backdrop-filter: blur(5px);
      padding: 15px;
      border-radius: 10px;
      margin: 20px 0;
      font-size: 1rem;
      line-height: 1.8;
      color: var(--text-color);
      transition: background-color 0.3s ease;
      box-shadow: none;
    }
    .blue-info-box p { margin: 5px 0;
    }
    .blue-info-box .buttons {
        margin-top: 10px;
    }
    #tutorialPage img {
        width: 100%;
        max-width: 450px;
        border-radius: 10px;
        margin: 1rem auto;
        display: block;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }
    .tutorial-text {
        line-height: 2;
        margin-top: 1.5rem;
        text-align: center;
        padding: 0 1rem;
    }
    .telegram-quote-box {
        background-color: var(--telegram-quote-bg);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-left: 4px solid var(--telegram-quote-border);
        border-radius: 8px;
        padding: 10px;
        margin: 20px auto;
        max-width: 350px;
        text-align: right;
        box-shadow: 0 2px 4px rgba(0,0,0,0.3);
        display: flex;
        align-items: center;
        direction: ltr;
        user-select: text !important;
        -webkit-user-select: text !important;
    }
    .ip-address-display {
        flex-grow: 1;
        font-family: monospace;
        font-size: 1.1rem;
        font-weight: bold;
        color: var(--text-color);
        text-align: left;
        margin-right: 0;
        padding-left: 10px;
        user-select: text !important;
        -webkit-user-select: text !important;
    }
    .btn-copy {
        background-color: transparent;
        color: var(--accent);
        border: none;
        padding: 0.5rem;
        border-radius: 8px;
        cursor: pointer;
        font-size: 1.3rem;
        line-height: 1;
        transition: color 0.3s, transform 0.3s;
        box-shadow: none;
        flex-shrink: 0;
        user-select: none !important;
        -webkit-user-select: none !important;
    }
    .btn-copy:hover {
        color: #1976d2;
        background-color: rgba(33, 150, 243, 0.1);
        transform: scale(1.1);
    }
    .ip-message {
        margin-top: 10px;
        font-size: 0.9rem;
        color: var(--accent);
    }
    .content-overlay {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(0, 0, 0, 0.7);
      display: none;
      justify-content: center;
      align-items: center;
      z-index: 2000;
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .content-overlay.active {
        display: flex;
        opacity: 1;
    }
    .content-box {
      background-color: rgba(0, 0, 0, 0.5);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 8px 30px rgba(0,0,0,0.5);
      color: var(--text-color);
      padding: 30px;
      border-radius: 20px;
      width: 90%;
      max-width: 300px;
      position: relative;
      text-align: center;
      transform: translateY(-50px);
      transition: all 0.3s ease-out;
      opacity: 0;
    }
    .content-overlay.active .content-box {
        transform: translateY(0);
        opacity: 1;
    }
    .close-button {
      position: absolute;
      top: 10px;
      right: 20px;
      font-size: 2rem;
      font-weight: bold;
      cursor: pointer;
      color: var(--text-color);
      transition: color 0.2s;
    }
    .close-button:hover {
        color: #f44336;
    }
    .modal-info {
        margin-top: 15px;
        text-align: center;
        line-height: 1.7;
    }
    .content-container {
        margin:15px auto;
        background:#FFFFFF;
        border-radius:10px;
        padding:10px;
        min-height:120px;
        cursor: pointer;
    }
.rubika-logo-link {
    display: block;
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
}

.rubika-logo {
    width: 100%;
    height: auto;
}

.rubika-text {
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-color);
    margin-top: 5px;
}

@media (max-width: 768px) {
    .rubika-logo {
        width: 40px;
    }
    .rubika-text {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .rubika-logo {
        width: 35px;
    }
    .rubika-text {
        font-size: 0.8rem;
    }
}