:root {
    --primary: #00f2ff;
    --accent: #7000ff;
    --bg: #050505;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-hover: rgba(255, 255, 255, 0.12);
}

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: white;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, #1a1a2e 0%, #050505 100%);
    z-index: -1;
}

.language-selector {
    position: absolute;
    top: 25px;
    right: 25px;
    z-index: 1000;
    cursor: pointer;
    user-select: none;
}

.selected-lang {
    background: var(--glass);
    padding: 10px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: 0.3s ease;
}

.selected-lang:hover {
    background: var(--glass-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    width: 220px;
    overflow: hidden;
    backdrop-filter: blur(25px);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 15px 40px rgba(0,0,0,0.8);
}

.language-selector.open .lang-dropdown {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.lang-dropdown div {
    padding: 12px 20px;
    font-size: 0.9rem;
    color: #bbb;
    transition: 0.2s;
}

.lang-dropdown div:hover {
    background: var(--primary);
    color: #000;
    font-weight: 600;
}

.container {
    width: 90%;
    max-width: 850px;
    text-align: center;
    background: var(--glass);
    padding: 50px;
    border-radius: 40px;
    backdrop-filter: blur(30px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 30px 60px rgba(0,0,0,0.6);
}

.logo {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: 6px;
    margin: 0;
    text-transform: uppercase;
}

.logo span {
    color: var(--primary);
    text-shadow: 0 0 30px rgba(0, 242, 255, 0.5);
}

.subtitle {
    color: #888;
    font-size: 1.1rem;
    margin-top: 10px;
    letter-spacing: 1px;
}

textarea {
    width: 100%;
    height: 140px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    color: white;
    padding: 20px;
    font-size: 1.05rem;
    resize: none;
    margin-top: 40px;
    outline: none;
    box-sizing: border-box;
    transition: 0.3s;
}

textarea:focus {
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.5);
}

.grid-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 12px;
    margin: 30px 0;
}

.task-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #555;
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 500;
    transition: 0.3s;
}

.task-btn.active {
    color: #ccc;
    border-color: rgba(255, 255, 255, 0.2);
}

.task-btn.active:hover {
    background: rgba(255, 255, 255, 0.08);
    color: white;
    border-color: var(--primary);
}

.task-btn.locked {
    opacity: 0.2;
    cursor: not-allowed;
}

#generate-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border: none;
    border-radius: 20px;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    letter-spacing: 2px;
    transition: 0.4s;
    margin-top: 10px;
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(112, 0, 255, 0.4);
}

.hidden { display: none; }

#progress-container {
    margin-top: 40px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: var(--primary);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

#progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    box-shadow: 0 0 20px var(--primary);
    transition: width 0.3s ease;
}

body[dir="rtl"] .language-selector {
    right: auto;
    left: 25px;
}