@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;700&display=swap');

    :root {
      --bg-color: #f9fafc;
      --text-color: #333;
      --header-bg: #fff;
      --accent-color: #00b9b9;
      --accent-dark: #008080;
      --card-bg: #fff;
      --shadow-color: rgba(0,0,0,0.08);
      --footer-bg-start: #111;
      --footer-bg-end: #222;
      --footer-text: #aaa;
    }

    [data-theme="dark"] {
      --bg-color: #121212;
      --text-color: #ddd;
      --header-bg: #1e1e1e;
      --accent-color: #00dada;
      --accent-dark: #00b9b9;
      --card-bg: #1e1e1e;
      --shadow-color: rgba(0,0,0,0.5);
      --footer-bg-start: #000;
      --footer-bg-end: #111;
      --footer-text: #ccc;
    }

    body {
      margin: 0;
      font-family: "Vazirmatn", sans-serif;
      background-color: var(--bg-color);
      color: var(--text-color);
      direction: rtl;
      overflow-x: hidden;
      -webkit-tap-highlight-color: transparent;
      font-size: 16px;
      transition: background-color 0.3s ease, color 0.3s ease;
    }

    /* --- تولبار --- */
    header {
      background: var(--header-bg);
      box-shadow: 0 2px 6px var(--shadow-color);
      padding: 5px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 1000;
      height: 55px;
      transition: box-shadow 0.3s ease, background 0.3s ease;
    }

    header:hover {
      box-shadow: 0 4px 12px rgba(0,185,185,0.1);
    }

    header .logo {
      display: flex;
      align-items: center;
    }

    header .logo img {
      width: 130px;
      height: 55px;
      object-fit: contain;
    }
  
    nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    nav a {
      margin: 0 12px;
      text-decoration: none;
      color: var(--text-color);
      font-weight: 400;
      font-size: 1rem;
      transition: color 0.3s ease, background-color 0.3s ease;
      padding: 4px 8px;
      border-radius: 4px;
    }
    
    nav a.active {
      color: var(--accent-color);
      background-color: rgba(0,185,185,0.1);
      font-weight: 700;
    }

    nav a:hover {
      color: var(--accent-color);
      background-color: rgba(0,185,185,0.05);
    }
    
    .theme-switch {
      display: flex;
      align-items: center;
      margin-left: 20px;
    }

    .theme-switch input {
      display: none;
    }

    .theme-switch-label {
      position: relative;
      display: inline-block;
      width: 56px;
      height: 28px;
      background-color: #ccc;
      border-radius: 28px;
      cursor: pointer;
      transition: background-color 0.3s ease;
      overflow: hidden;
    }

    .theme-switch-label::before {
      content: '';
      position: absolute;
      top: 2px;
      left: 2px;
      width: 24px;
      height: 24px;
      background-color: #fff;
      border-radius: 50%;
      transition: transform 0.3s ease;
      box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    }

    .theme-switch-label .sun-icon,
    .theme-switch-label .moon-icon {
      display: none;
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      font-size: 16px;
      transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .theme-switch-label .sun-icon {
      content: '\f185';
      left: 8px;
      color: #ffd700;
      opacity: 1;
    }

    .theme-switch-label .moon-icon {
      content: '\f186';
      right: 8px;
      color: #292929;
      opacity: 0;
    }

    .theme-switch input:checked + .theme-switch-label {
      background-color: var(--accent-color);
    }

    .theme-switch input:checked + .theme-switch-label::before {
      transform: translateX(28px);
    }

    .theme-switch input:checked + .theme-switch-label .sun-icon {
      opacity: 0;
      transform: translateY(-50%) translateX(-10px);
    }

    .theme-switch input:checked + .theme-switch-label .moon-icon {
      opacity: 1;
      transform: translateY(-50%) translateX(0);
    }

    .theme-switch input:not(:checked) + .theme-switch-label .sun-icon {
      opacity: 1;
      transform: translateY(-50%) translateX(0);
    }

    .theme-switch input:not(:checked) + .theme-switch-label .moon-icon {
      opacity: 0;
      transform: translateY(-50%) translateX(10px);
    }

    .nav-toggle {
      display: none;
    }

    .nav-toggle-label {
      display: none;
      cursor: pointer;
      width: 35px;
      height: 35px;
      position: relative;
      transition: background-color 0.3s ease;
    }

    .nav-toggle-label img {
      width: 30px;
      height: 30px;
      padding: 8px;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }

    @media screen and (max-width: 768px) {
      header {
        justify-content: space-between;
        padding: 10px 20px;
        align-items: center;
      }

      .nav-toggle-label {
        display: flex;
        align-items: center;
        justify-content: center;
        order: -1;
      }

      .logo {
        margin-right: 10px;
        margin-left: 0;
      }

      .theme-switch {
        margin-right: auto;
        margin-left: 0;
      }

      nav {
        display: none;
        position: absolute;
        top: 55px;
        right: 0;
        width: 100%;
        background: var(--header-bg);
        box-shadow: 0 2px 6px var(--shadow-color);
        padding: 20px 0;
        opacity: 0;
        transform: translateY(-20px);
        transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      }

      .nav-toggle:checked ~ nav {
        display: block;
        opacity: 1;
        transform: translateY(0);
      }
      
      nav a:hover, nav a.active {
        border-right: 4px solid var(--accent-color);
        background-color: rgba(0,185,185,0.05);
        transform: translateX(-5px);
        }
        
      nav a {
        display: block;
        margin: 10px 0;
        padding: 10px 40px;
        text-align: right;
        border-right: 4px solid transparent;
        font-size: 1rem;
        transition: border-color 0.3s ease, background-color 0.3s ease, transform 0.3s ease;
      }

      nav a:hover {
        border-right: 4px solid var(--accent-color);
        background-color: rgba(0,185,185,0.05);
        transform: translateX(-5px);
      }
    }

    @media screen and (min-width: 769px) {
      .nav-toggle-label {
        display: none;
      }
    }

    /* --- بخش معرفی --- */
    .hero {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 60px 40px;
      max-width: 1200px;
      margin: auto;
      flex-wrap: wrap;
      gap: 40px;
      position: relative;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at top right, rgba(0,185,185,0.05), transparent);
      z-index: -1;
    }

    .hero-text {
      flex: 1;
      min-width: 300px;
    }

    .hero-text h1 {
      font-size: 2rem;
      color: #222;
      margin-bottom: 1rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-color), var(--accent-dark), var(--accent-color));
      background-size: 200% 200%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      animation: gradient-rotate 5s ease infinite;
      transition: transform 0.3s ease;
    }

    @keyframes gradient-rotate {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }

    /*
    .hero-text h1:hover {
      transform: scale(1.05);
    }
    */

    .hero-text p {
      font-size: 1rem;
      color: #555;
      margin-bottom: 1.5rem;
      line-height: 1.8;
      font-weight: 300;
    }

    .download-buttons {
      display: flex;
      flex-direction: row;
      gap: 16px;
    }

    .download-buttons a {
      display: inline-flex;
      align-items: center;
      padding: 14px 28px;
      text-decoration: none;
      font-size: 0.9375rem;
      font-weight: 600;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      border-radius: 12px;
      box-shadow: 0 3px 6px var(--shadow-color);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
      color: #fff;
    }

    .btn-primary::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: rgba(255,255,255,0.15);
      transition: top 0.3s ease;
    }

    .btn-primary:hover::before {
      left: 0;
    }

    .btn-primary:hover {
      transform: translateY(-5px);
      color: #fff;
    }

    .btn-secondary {
      background: linear-gradient(135deg, #f5F5F5, #ddd);
      color: #333;
    }

    .btn-secondary::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.05);
      transition: left 0.3s ease;
    }

    .btn-secondary:hover::before {
      left: 0;
    }

    .btn-secondary:hover {
      transform: translateY(-5px);
      color: #333;
    }

    .hero-mobile-image {
      display: none;
    }

    .hero-desktop-image {
      flex: 0 0 40%;
      width: 40%;
      height: 400px;
      object-fit: contain;
      transition: transform 0.3s ease;
    }

    .hero-desktop-image:hover {
      transform: scale(1.02);
    }

    @media screen and (max-width: 768px) {
      .hero {
        flex-direction: column;
        padding: 40px 20px;
        text-align: center;
      }

      .hero-text {
        max-width: 100%;
      }

      .hero-text h1 {
        font-size: 1.75rem;
      }

      .hero-text p {
        font-size: 0.9375rem;
      }

      .hero-mobile-image {
        display: block;
        width: 220px;
        height: 220px;
        padding: 0px;
        margin: 0 auto 1rem;
        object-fit: contain;
      }

      .hero-desktop-image {
        display: none;
      }

      .download-buttons {
        flex-direction: column;
        gap: 12px;
        max-width: 100%;
      }

      .download-buttons a {
        width: 100%;
        justify-content: center;
        padding: 16px 0;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0,185,185,0.1);
      }

      .btn-primary {
        background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
      }

      .btn-primary:hover {
        background: linear-gradient(135deg, var(--accent-dark), var(--accent-color));
        transform: translateY(-5px);
        box-shadow: 0 4px 8px rgba(0,185,185,0.2);
      }

      .btn-secondary {
        background: linear-gradient(135deg, #e0e0e0, #f5f5f5);
      }

      .btn-secondary:hover {
        background: linear-gradient(135deg, #ffffff, #e0e0e0);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
      }
    }

    /* --- بخش رویدادها / ویژگی‌ها --- */
    .features {
      background: var(--card-bg);
      padding: 40px 20px;
      text-align: center;
      position: relative;
      transition: background 0.3s ease;
    }

    .features::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at bottom left, rgba(0,185,185,0.03), transparent);
      z-index: -1;
    }

    .features h2 {
      font-size: 2rem;
      margin-bottom: 40px;
      color: var(--text-color);
      position: relative;
      font-weight: 700;
      transform: scale(1);
    }

    .features h2::after {
      content: '';
      display: block;
      width: 50px;
      height: 3px;
      background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
      margin: 10px auto 0;
      border-radius: 2px;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      max-width: 1200px;
      margin: auto;
    }

    .feature-card {
      background: linear-gradient(135deg, var(--card-bg), rgba(0,185,185,0.02));
      padding: 20px;
      border-radius: 20px;
      box-shadow: 0 4px 8px var(--shadow-color);
      transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
      text-align: right;
      border: 1px solid rgba(0,185,185,0.1);
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(0,185,185,0.1) 0%, transparent 70%);
      transition: transform 0.5s ease;
      opacity: 0;
    }

    .feature-card:hover::before {
      transform: scale(1.2);
      opacity: 1;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 8px 16px rgba(0,185,185,0.15);
    }

    .feature-card h3 {
      color: var(--accent-color);
      margin-bottom: 12px;
      font-size: 1.5rem;
      display: flex;
      align-items: center;
      font-weight: 400;
    }

    .feature-card h3 i {
      font-size: 1.5rem;
      margin-left: 8px;
      color: var(--accent-color);
      transition: transform 0.3s ease, color 0.3s ease;
    }

    .feature-card:hover h3 i {
      transform: rotate(15deg) scale(1.2);
      color: var(--accent-dark);
    }

    .feature-card p {
      color: #555;
      font-size: 1rem;
      line-height: 1.6;
      border-top: 1px solid rgba(0,185,185,0.1);
      padding-top: 12px;
      font-weight: 300;
      transform: scale(1);
    }

    /* --- بخش توضیحات اضافی --- */
    .additional-info {
      padding: 60px 20px;
      max-width: 1200px;
      margin: auto;
      text-align: center;
      background: linear-gradient(to bottom, var(--bg-color), var(--card-bg));
      transition: background 0.3s ease;
    }

    .additional-info h2 {
      font-size: 2rem;
      margin-bottom: 20px;
      color: var(--text-color);
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      transform: scale(1);
    }

    .additional-info p {
      font-size: 1rem;
      color: #555;
      line-height: 1.8;
      max-width: 800px;
      margin: auto;
      border: 1px solid rgba(0,185,185,0.1);
      padding: 20px;
      border-radius: 12px;
      background: var(--card-bg);
      box-shadow: 0 2px 4px var(--shadow-color);
      font-weight: 300;
      transform: scale(1);
    }

    @media screen and (max-width: 768px) {
      .features h2 {
        font-size: 1.75rem;
      }

      .feature-card h3 {
        font-size: 1.25rem;
      }

      .feature-card p {
        font-size: 0.9375rem;
      }

      .additional-info h2 {
        font-size: 1.75rem;
      }

      .additional-info p {
        font-size: 0.9375rem;
      }
    }

    /* --- فوتر --- */
    footer {
      background: linear-gradient(180deg, var(--footer-bg-start), var(--footer-bg-end));
      color: var(--footer-text);
      padding: 40px 20px;
      text-align: center;
      font-size: 1rem;
      font-weight: 300;
      position: relative;
      overflow: hidden;
      transform: scale(1);
    }

    footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at top center, rgba(0,185,185,0.05), transparent);
      z-index: 0;
    }

    .footer-content {
      max-width: 1200px;
      margin: auto;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-around;
      gap: 20px;
      position: relative;
      z-index: 1;
    }

    .footer-section {
      flex: 1;
      min-width: 200px;
    }

    .footer-section h4 {
      color: #fff;
      margin-bottom: 15px;
      font-weight: 400;
      font-size: 1rem;
      position: relative;
    }

    .footer-section h4::after {
      content: '';
      display: block;
      width: 30px;
      height: 2px;
      background: var(--accent-color);
      margin-top: 5px;
    }

    .footer-section a {
      display: block;
      color: var(--footer-text);
      text-decoration: none;
      margin-bottom: 8px;
      font-size: 0.875rem;
      transition: color 0.3s ease, transform 0.3s ease;
    }

    .footer-section a:hover {
      color: var(--accent-color);
      transform: scale(1.06);
    }

    .social-icons {
      display: flex;
      justify-content: center;
      gap: 15px;
    }

    .social-icons a {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 45px;
      height: 45px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
      color: #fff;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    .social-icons a:hover {
      transform: translateY(-3px);
      box-shadow: 0 4px 8px rgba(0,185,185,0.3);
    }

    .social-icons img {
      width: 24px;
      height: 24px;
    }

    .footer-bottom {
      margin-top: 20px;
      border-top: 1px solid #333;
      padding-top: 20px;
      position: relative;
      z-index: 1;
    }

    @media screen and (max-width: 768px) {
      .social-icons {
        flex-wrap: nowrap;
      }

      footer {
        font-size: 0.9375rem;
      }
    }

    /* رنگ اصلی فیروزه‌ای برای اکسنت‌ها */
    a {
      color: var(--accent-color);
    }

    a:hover {
      color: var(--accent-dark);
    }

    /* Dark mode adjustments */
    [data-theme="dark"] .hero-text p,
    [data-theme="dark"] .feature-card p,
    [data-theme="dark"] .additional-info p {
      color: #bbb;
    }

    [data-theme="dark"] .hero-text h1,
    [data-theme="dark"] .features h2,
    [data-theme="dark"] .additional-info h2 {
      color: #eee;
    }

    [data-theme="dark"] .btn-secondary {
      background: linear-gradient(135deg, #333, #444);
      color: #ddd;
    }

    [data-theme="dark"] .btn-secondary:hover {
      color: #fff;
    }

    /* Ensure consistent font scaling in mobile desktop mode */
    @media screen and (min-width: 769px) {
      .features h2,
      .additional-info h2 {
        font-size: 2rem !important;
      }

      .feature-card p,
      .additional-info p,
      footer {
        font-size: 1rem !important;
      }
    }