* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #2F5B9E;
    font-family: 'Tahoma', 'Verdana', sans-serif;
    height: 100vh;
    overflow: hidden;
    color: #FFF;
}

.window-container {
    background-color: #000;
    width: 100%;
    height: calc(100vh - 45px);
    margin-bottom: 45px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    border-top: 2px solid #FFF;
    box-shadow: inset 0 0 10px rgba(255,255,255,0.2);
}

.window-header {
    background-color: #3874C6;
    background: linear-gradient(to bottom, #5996E0 0%, #2F5B9E 100%);
    padding: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    border-radius: 4px 4px 0 0;
}

.app-icon {
    font-size: 20px;
    margin-right: 5px;
}

.title-text {
    color: #FFF;
    font-weight: bold;
    text-shadow: 1px 1px 0 rgba(0,0,0,0.8);
    flex-grow: 1;
}

.window-controls button {
    background: linear-gradient(to bottom, #E4E4E4, #B0B0B0);
    border: 1px solid #7A7A7A;
    padding: 2px 8px;
    margin-left: 5px;
    cursor: pointer;
    font-weight: bold;
    color: #333;
}

.dos-content {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 20px;
    line-height: 1.6;
    font-size: 18px;
}

.dos-content::-webkit-scrollbar {
    width: 15px;
}
.dos-content::-webkit-scrollbar-track {
    background: #000; 
}
.dos-content::-webkit-scrollbar-thumb {
    background-color: #C0C0C0;
    border: 2px solid #FFF;
    box-shadow: inset -1px -1px 0 rgba(0,0,0,0.5);
}

.taskbar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 45px;
    background-color: #2F5B9E;
    border-top: 2px solid #6C87BF;
    display: flex;
    align-items: center;
    padding-left: 10px;
}

.start-button {
    background-color: #E3F6FF;
    border-radius: 5px 5px 0 0;
    border-top-left-radius: 5px;
    padding: 8px 15px;
    font-weight: bold;
    color: #000;
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    box-shadow: inset 2px 2px 5px rgba(255,255,255,1), inset -2px -2px 3px rgba(0,0,0,0.2);
    margin-right: auto;
}

.start-button:hover {
    background-color: #D6EFFF;
}

.clock {
    color: #FFF;
    font-size: 14px;
    margin-left: auto;
    padding-right: 10px;
}

@media (max-width: 600px) {
    .dos-content { font-size: 14px; }
}